United States Patent
[72] Inventor
1111 3,594,676
Donald 0. Misare
OTHER REFERENCES
Riverside, Ill.
[21] Appl. No. 850,078
[22] Filed
Aug. 14, 1969
_ [45] Patented
[73] ‘Assignee
WESTINGHOUSE DESCRIPTIVE BULLETIN, 38-620,
Dec. 1961, pages l- 8
July 20, 1971
Primary Examiner-Bernard A. Gilheany
Joslyn Mfg. and Supply Co.
Chicago, Ill.
Assistant Examiner-Dewitt M. Morgan
Attorney- Mason, Kolehmainen, Rathburn & Wyss
[54] ELECTRICAL CUTOUT
,
ABSTRACT: An electrical cutout comprising a ?rst terminal
6 Claims, 3 Drawing Figs.
and a of terminal movable on a path into and out of contact
[52]
[51]
0.8. CI. ...................................... .. 337/180
Int. Cl ....................... Quin...‘ ................... .JLLlghjl/OB,
'ing a free end portion extending generally transversely across
[50]
Field ot'Search .......................................... ..
HOlh 71/10, H01h 85/54
337/168,
l7],172,174,176,177,l78,180,181
[56]
References Cited
UNITED STATES PATENTS
2,549,635
2,398,469
4/1951 Pittman ...................... ..
4/1946 Schultz etal. .............. ..
2,359,153
1,953,136
9/1944
4/1934
Rawlins ......... ..
Steinmayer ................. ..
337/171
337/180(X)
337/172
337/176
therewith. The ?rst terminal includes a contact member hav
said path and de?ectable along the path during the making
and breaking of contact with said second terminal. The second
terminal includes a contact surface extended generally trans
versely of said path adapted to provide a low resistance cur‘
rent interchange point when in contact against the de?ectable
free end portion of the ?rst terminal. The ?rst terminal in—
cl udes a terminal support bracket having stop means extended
transversely across said path for limiting the movement of the
free end portion of the contact member and a sleet hood on
which the bracket is mounted, which sleet hood includes in
tegrally formed top, side, and end walls.
PATENTEDJuL20i9n
3'» 594- 676
SHEET 3 OF 3
FIG?)
BYDONALD OMISARE
ATT'YS
'
3,594,676
1
2
FIG. 2 is a side elevational view similar to FIG. 1 but illus
v
ELECTRICAL curour
-
- trating the cutout assembly in a disconnected or open-circuit
position;
The present invention relates to a new and improved electri
cal cutout and, more particularly, to a new and improved fusi
ble dropout-type cutout which is of simple and rugged con
struction and thoroughly reliable in operation.
The present invention is an improvement over the fusible
cutout shown in US. Pat. No. 2,862,080, which patent is
owned by the assignee of the present application. In dropout
type, fusible cutouts it is desirable and an object of the present
invention to provide for a minimum of contact resistance and
a minimum number of current interchange points between the
powerlines connected across the fusible lin .
-
Another object of the present invention is to provide a new
and improved cutout wherein at least one contact member is
fonned of low-resistance, high-current-capacity material, such
FIG. 3, comprising parts 3A and 3B, is an exploded view in
perspective illustrating the individual terminal components of
the upper and lower ?xed terminals of the cutout.
Referring now to the drawings, and more particularly to
FIGS. 1 and 2 thereof, a new and improved dropout-type, fusi
ble cutout constructed in accordance with the invention is il
lustrated and generally referred to by the reference numeral
10. The cutout includes an elongated insulating support in the
form of a petticoat insulator 12 formed of porcelain having a
center section around which a support clamp assembly 14 is v
provided for supporting the cutout from a crossarm or other
structure. Upper and lower end portions of the petticoat insu
lator 12 are formed with cylindrical terminal sections 16, each
having an annular groove therein for receiving a U-bolt,18
used for supporting upper and lower terminal assemblies 20
as copper or silver, and is physically supported by a backup
spring formed of a relatively strong material well able to
‘
l
20 and 22 on the insulator body.
withstand relatively high forces or pressures needed to provide
The lower terminal assembly 22 is adapted to pivotally sup
a minimum resistance contact at a current interchange point.
port the lower end of an expulsion, dropout'type fuse as
Another object of the present invention is to provide a new
sembly 24 which, except for the terminals at the upper and
and improved electrical cutout wherein a minimum number of
current interchange contact points are required. '
vStill another object of the present invention is to provide a
cutout having newland improved terminal means including a
unitary sleet‘ hood having integrally formed top, end, and
sidewalls which can be mass produced at relatively low cost on
' lower ends thereof, may be identical or similar to the fuse as
sembly shown in U.S. Pat. No. 3,344,251, which patent is as
signed to the same assignee as the present invention.
The fuse assembly 24 includes an elongated, hollow, insulat
ing fuse tube 26 having an upper fuse terminal 28 at the upper
end. The upper fuse terminal'28 includes a cylindrical main
a punch press, or the like, and which does not require welding 30 body 30 and an integrally formed loop 32 extending outwardly
or other fabricating operations thereon.
thereof and adapted to receive the pin of a hot stick used for
Another object of the present invention is to provide a new
working the cutout while hot. Projecting upwardly from the
and improved electrical cutout of the character described
main body 30 is a short tubular section 34 threaded externally
which lends itself to manufacture on a mass production basis
to receive a terminal cap 36 and adapted to enclose the upper
with the consequent economy thereof and yet without sacri?c 35 end portion of a fusible link which includes a cable 38. The
ing any operational reliability or useful life of the cutout, even
cable extends longitudinally through the fuse tube and passes
though the cutout may be subjected to extreme weather con
out the open lower end. The trailing end of the cable 38 is
ditions for long periods of time.
~
secured to the bottom of a contact loop 40 on a lower fuse ter
A further object of the present invention is to provide a new
minal assembly. 42 at the lower end of the fuse tube 26. The
,and improved electrical cutout having a new and improved 40 lower fuse terminal 42 includes a body 44 mounted on the fuse
sleet hood which supports the terminal contact members in
tube and having a pair of iladially outwardly extending arms
novel fashion.
‘
I
The foregoing and other objects and advantages of the
present invention are provided by a new and improved electri
cal cutout comprising a ?rst terminal and a second terminal
movable on a path into and out of contact therewith. The ?rst
terminal includes a contact member having a free end portion
extending generally transversely across the path of movement
of the second termiiial and is de?ectable along said path when
46. A pivot pin 48 is carried by the arms to pivotally support
the contact loop‘ 40 which is fonned with a pair of trunnion
pins 404 extendingin opposite directions and laterally out
wardly of the fuse tube. The trunnion pins or axles 40a are
adapted to pivotally support the lower end of the fuse as
sembly 24 on the lower ?xed terminal 22 on the insulator
body. -
The trailing end of the cable 38 is secured to the lower end
contact between the terminals is being made or broken. The 50 of the contact loop 40 by a pair of washers 49and a bolt 50, so
second terminal includes a contact surface generally transver
that proper tension is maintained on the fuse link. The cable
sely of said path for establishing high-pressure physical con
passes underneath a guide member 52 which is pivotally sup
tact with the contact member of the ?rst terminal, thereby
ported on a pin 54 extending through the contact loop 40, and
providing a low-resistance, high-current-capacity interchange
when the fusible link is melted by a fault current, the guide
point. The ?rst terminal also includes a support bracket and
member 52 pivots downwardly and permits the fuse assembly
sleet hood for supporting the contact member, which can be . to drop out.
formed of low-resistance copperor silver, and the bracket in
In accordance with the present invention, the ?xed terminal
cludes stop means extending transversely across said path for
assembly 22 at the lower end of the insulator body 12 includes
limiting the movement of the free end portion of the contact 60 a unitary sleet hood 56 having a pair of downwardly depend
member when the second terminal is brought into contact
ing opposite sidewalls 58, a i'ear end wall 60, and a top wall 62.
The walls of the sleet hood are integrally joined and the hood
The cutout includes a new and improved unitary sleet hood
is formed from a single piece of metal in a punch press, deep
therewith.
.
_
.
having integrally formed, end, top, and sidewalls and the con
drawing operation. The hood requires no bending or welding
tact member is supported on the sleet hood in a manner 65 and can be mass produced on an economical basis. The rear
wherein a minimum number of current interchange contact
end wall 60 is formed with a vertically extending, curved
points are required to establish the current path between lead
recess or indentation 60a at the central portion thereof
wires connected to the cutout.
adapted to fit arolmd and seat tightly against the cylindrical,
For a better understanding of the present invention,
lower terminal end portion 16 of the insulator body. A pair of
reference may be had to the following detailed description and 70. holes are punched in the end wall on opposite sides of the
claims and the accompanying drawings, in which:
recess 60}: for receiving the legs of the U-bolt 18. The forward
FIG. I is a side'elevational view, with portions broken away
end of the sleet hood 56 is open (as best shown in FIG. 38) to
and in cross section, illustrating anew and improved dropout
receive the contact member 40 of the lower fuse terminal 42.
type, fusible cutout constructed in accordance with the fea
Each sidewall 58 of the sleet hood includes a curved projec
tures of the present'invention;
1
75 tion 580 at the forward end de?ning a curved groove 59 along
'3
3,594,676
4
its inner edge, and the groove is open at the upper end for
removably receiving and supporting a trunnion axle 400 on
the contact loop 40. The pin and slot connection between the ,
axles 40a andslots 59 permits the fuse assembly 24 to be
pivoted out of engaging contact with the upper terminal 20 on
the insulator body I2 and also permits the fuse assembly to be
removed completely from contact with the lower terminal 22
at the lower end of the insulator body 12..
In accordance with the invention, the unitary, integrally
formed, sleet hood 56 is ?rmly secured to the lower cylindrical 10
because the contact between the upper fuse terminal 28 and
the ?xed terminal 20 is made or broken in advance of the
‘terminal portion 16 on the insulator body 12 by the lower U
struction results in a high-pressure contact with a low re
bolt 18 and a pair‘ of nuts and washers shown in dotted lines in
FIG. 3B. The sleet hood directly supports the terminal contact
members of the lower terminal 22 which make and break con
tact with the Contact loop 40 of the lower fuse terminal. The
sistance and high current-carrying capacity. Only a single cur
rent interchange point is used, and this occurs between the
lower terminals. The spring member 68 resists deflection of
the free end portion 66 of the contact strip as contact is made
and provides the force necessary to establish the desired con
tact pressure. This permits the contact strip 66 to‘ be
fabricated of material such as copper or silver, which has ex
cellent current-carrying capacity but is relatively soft and
would not be suitable from a purely mechanical standpoint
because of the relatively high forces involved. This novel con
head of the contact button 4I and the de?ectable free end
portion 66e of the contact strip. The lower vertical leg 66c is in
lower, ?xed terminal 22 includes a generally Z-shaped support
direct contact with the external conductor 70, and the contact
bracket 64 formed of relatively thick strap material with an
strip 66 thus carries the current direct between the button 41
and the conductor with a minimum number of current in
upper leg 64a provided'with a pair of laterally outwardly ex
tending ears 64b; Each ear 6412 has an open~ended slot 65
therein for receiving the end of the U_bolt 18 which passes
through the slot and holds the bracket in place when the
terchange points. The legs 64a, 66a, and 68a of the support,
contact strip and spring member and the rear wall 60 of the
sleet hood are connected together with a rivet 69 so that all of
washer and nuts are tightened.v The ears 64b are slightly offset
these members are maintained at the same electrical potential.
(FIG. 38) from the main body of the upper leg 64a in order to
provide space for a generally Z-shaped current carrying con
vThe conductor 70 is formed with a looped end 70a disposed
directly against one face of the lower leg 660 of the contact
strip, and high-pressure contact is maintained by means of a
U-shaped clamping bracket 72 held in place by a bolt 74 and
tact strip 66 formed of low-resistance, high-conductance
material, such as copper or silver. The contact strip includes
an upper, vertical, leg 66a, and intermediate horizontal leg -
nut 74a.
-
66b, and a lower vertically downwardly extending terminal leg
Referring to FIGS. I and 2, it will be seen that when the fuse
66c. The horizontal leg 66b is adapted to nest in contact 30 assembly 24 is pivoted from the open or broken circuit condi
tion of FIG. 2 to the closed or contact-making position of FIG.
against a horizontal intermediate leg 640 of the support
1, the contact button 41 on ‘the contact loop 40 of the lower
bracket, which includes a downwardly extending vertical '
fuse terminal 42 is forcefully thrust in contact against the
lower terminal leg 64d in juxtaposition with the lower leg 66c
downwardly depending free end portions 664: of the contact
of the contact strip. The contact strip 66 is formed with a for
strip 66. After lower contact, is established, the upper fuse ter
wardly extending portion 66d extending generally parallel
minal 28 establishes contact with the terminal assembly 20 on
with the top wall 62 of the sleet hood 56 and at the forward
the upper end of the insulator body. If the cutout 10 is opened
end of the leg 66d the strip is bent downwardly to form a
with a hot stick or the like, contact is ?rst broken'between the
curved free end portion 66c especially adapted to make con
upper terminals and then between the lower terminals. The
tact with the contact loop 40 of the lower fuse terminal 42.
In order to back up and support the free end portion 66a of 40 cutout is designed so that when a fault current occurs, the fusi
the contact strip, the terminal 22 includes a generally U
ble link is broken, releasing tension on the cable 38, and the
shaped backup spring 68 which includes a vertical leg 68a
sandwiched between the contact strip leg 66a and support
bracket leg
The backup spring includes a bight portion
fuse assembly drops downwardly and contact is broken
between the upper terminal assembly 20 on the upper end of
the insulator body 12 and the upper fuse tenninal 28.
68b disposed beneath the leg 66d of the contact strip and a 45 - In accordance with the invention, the terminal assembly 20
on the upper end of the insulator body 12 includes a unitary
downwardly extendingfree-end portion 68c which backs up
sleet hood 76 having a top wall 78, a pair of depending
the free end portion 66c of the contact strip. The backup
' spring 68 is made ‘of material having the desired mechanical
strength characteristics-such as stainless steel and the like,
and the free end portion 680 functions to back up the contact
strip 66 and force the free end portion 66e of the contact strip
sidewalls 80, and a rear wall 82. Similar to the lower sleet
hood 56, the upper sleet hood 76 is integrally formed from a
single piece of metal on a punch press in a deep drawing
operation and does not require additional welding or bending
operations. Accordingly, the sleet hoods 56 and 76 can be
toward the contact loop 40 with sufficient pressure to
fabricated on a mass production basis at economical costs.
establish a low-resistance current interchange point with a
high current-carrying capability. _
55 The rear wall 82 of the sleet hood is formed with a vertically
extending, curved indentation or recess 82a adjacent the cen
Preferably, a headed contact button 41 of silver is mounted
tral portion thereof to conform to the adjacent surface of the
on a forward leg of the contact loop 40 to make contact
against the free end portion 66e of the contact strip. When the _ upper cylindrical terminal end portion 16 on the insulator
body 12. The upper sleet hood 76 is held in place by an upper .
fuse assembly 24 is pivoted in a counterclockwise manner
U-bolt 18, the legs of which extend through the circular holes
about the trunnion axles 40a from the open position of FIG. 2
punched in the rear wall 82, and suitable nuts and washers are
to the closed or contact making position of FIG. I, the contact 7
provided to hold the sleet hood firmly in place.
The upper terminal assembly body 20 includes a generally
Z-shaped support bracket 84 having an intermediate leg 84a
2,’and after contact initially occurs (FIG. 2) the contact por-v
tion 66c is de?ected inwardly in the general direction of the 65 disposed in parallel with the top wall 78 of the sleet hood and
secured thereto by a pair of upwardly extending bolts 86
arrow A to the position of FIG. I. The free end 66c of the con
which project through punched holes formed therein. In order
tact stn'p extends generally transversely across the path of
button Men the contact loop 40 is moved inwardly toward
the contact strip portion 66c, as shown by the arrow A in FIG. '
movement (arrow A) of the contact button 41 and, as the eu
tout is closed or opened, sliding contact between the head of
the button 41 and the free end portion 66c of the contact strip,
as well as inward and outward deflection-of the free end por
tion 66c in the direction generally the same as that of arrow
A, takes place. This action in making and breaking contact
to facilitate making connection between the upper terminal 20
and an upper exterior wire 70 having a looped end 70a (FIG.
3A), a rectangular slot 780 is formed in the top wall of the
sleet hood and an upper vertically extending leg 84b of the Z—
_ bracket 84 projects upwardly through the slot. At the forward
end, the support bracket includes a downwardly extending
stop leg 84c and the leg supports a pair of laterally outwardly
minimizes arcing or burning 'of the contacts, although nor
‘mally there is no current flow when'contact is made or broken 75 divergent, integral, guide lugs 84d for laterally guiding the
3,594,676
5
6
upper fuse terminal 28 into proper lateral alignment with the
12. In operation, when a fault current passes through the fuse
terminal assembly 20. The downwardly depending stop leg
link within the fuse tube 26, vertical upward thrust is initially
imparted to the fuse assembly 24 followed by a downward or
dropout thrust caused by the expulsion of gases from the tube.
When the vertical movement occurs sliding contact between
84c of the support bracket 84 provides a stop surface extend
ing generally transversely across the path of movement of the
contact portions of the upper fuse terminal 28 when the latter
is moved into contacting engagement in the direction‘ of the
arrow B. Because the fuse assembly 24 is oftentimes manipu
lated with a hot stick while carrying current, relatively high
forces may be imposed against the contacts on the upper ter»
minal assembly 20 when the circuit is being closed or opened
and the stop leg 840 provides means for backing up the con
‘ tact members to prevent excessive force and breakage result
ing therefrom.
The upper terminal includes a generally Z-shaped contact
' strip 88 having an upwardly extending terminal leg 88b, a - 5
horizontal, intermediate leg 88a parallel with the intermediate
current interchange points. In order to facilitate working of
the cutout with a hot stick while current is ?owing, a hook
strip 99 is extended across the top wall 78 of the upper sleet
hood 76 and is bolted thereto with bolts I00. Opposite end
portions of the strip 99 project laterally outwardly beyond the
sidewalls 80 of the sleet hood and are hooked, as at 99a, so
thatengagement with the hot stick is facilitated.
sembly 20 (arrow B, FIG. 2) and is spaced forwardly of the 25
stop leg 84c of the support bracket 84. When the fuse as
sembly 24 is pivoted in a counterclockwise direction from the
open position of FIG. 2 to the contact making position of FIG.
1, a pair of upper contact buttons 96 on the upper fuse ter
minal 28 move along the path described by the arcuate arrow
B into contact against the free end, contact portion 88c of the
-shaped contact strip and de?ect the contact portion rear
An upper external cable or line 70 is connected directly to
the upper terminal leg 88b of the Z-shaped contact strip 88, in
the same manner as below, to again minimize the number of
leg 84a of the support bracket 84, and the top wall 78 of the
sleet hood. At the forward end of the intermediate leg 88a, the
contact strip 88 is formed with a downwardly depending free
end portion 88c for making contact with the upper terminal 28
on the fuse assembly when the latter is closed. When the‘ eu
tout is open (FIG. 2), the contact portion 880 extends
generally transversely across the path of movement of the
upper fuse terminal 28 toward and away from the terminal as
the buttons 96 and contact strip portion 880 is maintained
until the‘ current ?ow is intei'rupted and the arc extinguished.
This results in reduced burning or arcing between the buttons
and contact strip 88 when the fuse assembly drops out and
pivots downwardly. Dropout occurs when the lug 920 has
moved downwardly far enough to clear the holding detent 98a
of the ?nger 98, and the fuse assembly then pivots in a
clockwise direction about the lower trunnion axles 400.
The new and improved cutout 10 of the present invention
provides many advantages over the prior art, including a more
economical cost because of the integrally formed, deep~
drawn, sleet hood and fewer parts in the units. Current han~
dling capacity is increased and contact resistance is reduced
30 by providing for a fewer number of current interchange points
and using low-resistance material for the contacts backed up
by spring members of the desired physical strength A novel
means for supporting the contact members, backing the con
wardly along the path into the de?ected position of FIG. I. In
order to back up the free end portion 880 of the contact strip, 35 tacts up, and providing guide and stop surfaces to protect
them from damage are another group of advantageous fea
which is preferably formed of copper or silver, there is pro.
tures provided by the invention. Because vertical contact sur
vided a generally -shaped, leaf spring member 90 which may
faces are provided, arcing or burning of contacts is minimized
be formed of stainless steel or other suitably strong material.
and
a double-venting fuse assembly can be readily accom
The spring 90 has a horizontal leg 90a sandwiched between
modated.
the intermediate legs 84a and 88a and a downwardly depend 40
What I claim as new and desire to be secured by Letters
ing free end portion 90b extends between the free end contact
patent of the United States is:
portion 88c of the Z-shaped contact member and the stop leg
1. An electrical cutout assembly comprising ?rst terminal
84c of the bracket 84. The spring member leg 90b backs up
means and second terminal means movable on a path into and
the free end contact portion 88c and provides the desired con
tact pressure between the portion 88c and the upper contact 45 out of contact therewith, said ?rst terminal means including a
contact member having a free end portion extending generally
buttons 96 to establish a low-resistance current interchange
transversely across said path and de?ectable along said path
point. The upper fuse terminal 28 includes a ?nger 92 project
upon making and breaking contact with said second terminal
ing forwardly from the cylindrical body 30, and the ?nger in
means, said second terminal means including a contact sur
cludes an upwardly projecting detent lug 92a for engagement
with a retaining ?nger 98 on‘the terminal assembly 20. At the 50 face generally transversely of said path for low-resistance cur
rent interchange contact against said de?ectable free end por
forward end of the ?nger 92 is formed a transverse contact
face 94 and the contact buttons 96 are mounted thereon. The
heads of the silver buttons are adapted to make a low-re
sistance contact with the forward face of the free end contact
portion 880 when the fuse assembly 24 is in the closed position
of FIG. 1, and the spring leg 90b provides the desired contact
pressure.
.
In order to hold the upper fuse terminal 28 of the fuse as
tion of said contact member, said ?rst terminal means includ
ing support means for said contact member having stop means
extended transversely across said path for limiting the move
ment of said free end portion along said path when said second
terminal contact surface is moved into contact therewith, both
said contact member and said support of said ?rst terminal
means being generally Z-shaped, each having a middle leg in
close parallel relation with the middle leg of the other and an
sembly 24 in the closed position (FIG. 1), the holding ?nger
98 includes a downwardly and forwardly extending detent 60 upstanding terminal leg at one end in contacting engagement
with the leg of the other forming a cable terminal for said cu
portion 98a‘ having a hooklike bend at the lower end. The de
tout,
said free end portion and said stop means comprising legs
tent portion 98a is adapted to engage a sloping rearward sur
of said contact member and said support, respectively, at the
' face on the lug 92a to thus retain the desired contact pressure
opposite ends of said middle legs thereof.
between the contact buttons 96 and the contact strip 88. The 65
2. The electrical cutout of claim I wherein said ?rst ter
retaining ?nger 98 is formed of relatively strong material, such
minal means includes a leaf spring member having one leg
as stainless steel, and includes an elongated base leg portion
disposed between and in engagement with the middle legs of
said
coritact'member and said support and a de?ectable leg
the Z-shuped contact strip 88 and the underside of the top wall
having a free end disposed between said free end portion of
78 of the sleet hood.
70 said contact member and said stop means for urging said free
From the foregoing, it will be seen that the contacting sur
end portion into high-pressure contact against said contact
faces of the buttons 96 and contact strip portion 88c are
surface of said second terminal means while the latter is in cir
generally perpendicular or transverse to the path of arcuate
cult-making contact with said ?rst terminal means.
movement of the terminal 28 into and-out of contact with the
terminal assembly 20 at the upper end of the insulator body 75 3. The electrical cutout assembly of claim I including an in~
sulator body for supporting said ?rst terminal means at one
98b sandwiched between the upper surface of the leg 88a of ‘
7
3,594,676
8
end thereof and a sleet hood having integrally formed
5. The electrical cutout assembly of claim 1 including
de?ectable latching means for holding said ?rst and second
terminal means in latchingly engaged electrical contact, said
' sidewalls, an inner end wall secured to said insulator body, and
a top wall, fastening means for securing said middle legs to the
underside of said top wall, and opening de?ning means in said
top wall for accommodating said upstanding terminal legs ex
latching means having a de?ectable latch ?nger with a free
outer end adapted to engage and hold a latch surface of said
second terminal means and an elongated body portion in close
tended upwardly therethrough.
4. An electrical cutout assembly comprising ?rst terminal
parallel relation with said middle legs.
means and second terminal means movable on a path into and
out of contact therewith, said ?rst terminal means including a
6. An electrical cutout assembly comprising an elongated
insulator body having ?xed terminals at opposite ends, a
switch member pivotally supported at one end by one of said
terminals and having contact means at the other end swinga
"ble into and out of contact with the other of said fixed ter
minals, said other ?xed terminal comprising a sleet hood hav
contact member having a free end portion extending generally
transversely across said path and deflectable along said path
upon making and breaking contact with said second terminal
means, said‘second terminal means including a contact sur
face generally transversely of said path for low-resistance cur
ing an integrally formed top wall, parallel sidewalls and inner
rent interchange contact against said deflectable free end por 15
end wall secured to said insulator body and a terminal contact
tion of said contact member, said ?rst terminal means includ
secured to the underside of said top wall and having a terminal
ing support means for said contact member having stop means
leg extended upwardly through a slot therein for supporting an
extended transversely across said path for limiting the move
external connection to said cutout, said terminal contact being
ment of said free end portion along said path when said second
terminal contact surface is moved into contact therewith, and 20 Z-shaped. and including a ‘contact leg at the forward end
spacedfrom said terminal leg and projecting downwardly of
a pair of guide members integrally fonned on said support ex
said top wall of said sleet hood generally transversely across an
tending laterally outwardly in opposite angular directions
arcuate path of movement of said contact ‘means on said
from said stop means for guiding said second terminal means
switch member toward and away from said‘contact leg.
into circuit-making contacting engagement with said ?rst ter
minal means.
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