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Патент USA US2117029

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May-10, 1938.
E. A. LARssoN
Filed Feb. 1e, 19:57
Á flor ney
Patented May 1o, 193s
Ernst A. Larsson, Mansiield, Ohio. assignor to
The Ohio Brass Company, Manslield, Ohio, a
corporation of New Jersey
Application February 16, 1937, Serial No. 126,012
4 claims.
(C1. rial-332)
My invention relates to couplers and particularly to electric couplers for connecting conduc-
is connected directly to the spring advanced con
tact member; thus, the contactor and the cable
tors of one car with the conductors of a coupled
must move simultaneously.
To over-come the diilìculty mentioned above, I
The use of electric couplers on cars both inde-
have devised a construction in which the con- 5
pendent. of and in combination with mechanical
couplers is old, but under both conditions there
has been diñlculty in maintaining a constant
connection between the electric couplers at all
io `time, and one object of my invention is to provide a new and improved form of electric coupler
over-coming this diincult ,
tact member at the front end of the coupler is
free to reciprocate `independent of the cable.
thus when there is a tendency for the contactors
to reciprocate for the reasons mentioned above.
the advancing spring will maintain the contact
members in coupled relation regardless of how y. . 0
much stress may be placed on the cable from the
My invention resides in the new and novel
construction, combination, and relation of the
15 various parts hereinafter described and shown
in the accompanying drawing.
In the drawing;_
Fig. 1 shows a face view of an electric coupler
having incorporated therein my invention and
20 attached tc amechanicai car coupler,
Eig. 2 is a, view in partial section on the line
2_.2 of Em 1_
Fig. 3 is a fragmentary view in partial section
of two electric couplers having incorporated
25 therein a portion of my invention, in coupled relation.
Fig. 4 is a transverse sectional view on the line
4-4 of Fig. 2.
Fig. 5 is a view of a single coupling unit of
3“ a type in common use and previously referred to
In rounding curves there is a decided side or
lateral strain to the two coupling units holding
the cars mechanicallyincoupled relation. Where
35 the electric coupleris attached to the mechanical
coupler this side strain is also transmitted to the
electric coupler.
The eiîect of this side strain tends to separate
the electric contacts of the electric coupler on
lo the far side of the coupler from the center of
curvature of the track.
Under normal operations this slight relative
movement of the electric couplers on one side will
not open the circuit from car to car with the com5 mon type of coupler (see Fig. 5), but it is foundV
that particularly in the winter time when the
cable leading to the coupler becomes loaded with
ice due to condensation and freezing of leaking'
Steam that the weight of such ice formation on
D the cable and the stillness of the cable will not
permit the contact member of the coupler to
operate freely under the action of the advancing
spring, thus causing the circuit to open at lthe
contacts under the conditions mentioned.y
i It will be noted in Fig. 5 that the conductor
accumulation of ice or for other reasons. '
In the preferred embodiment of my invention,
I employ a Support l Which may be of various 15
forms and constructions and which I have shown
as supported from a mechanical car coupler 2
by means of the bolts 3. In Fig. 1, I have shown
the Support as a easing l equipped With three
electric connecters 4, but any number may be 20
used to meet requirements. The car coupler 2
holds the cooperating electrical connecters on
two coupled cars in connected relation.
The Casing I is provided With registering open
ings 5 and 6. the latter being shown as threaded. „
Mounted in the opening 5 is an insulating bushing
1 having a cavity 8 in which is mounted a con
tactor 9 having a. head I Il and stem Il.
The contactor reciprocates in the cavity 8 and
is yieldingly held in its advanced position by 30
means of the spring I2. The contactar 9 is pre
vented from advancing beyond a predetermined
amount by means of a nut or collar I3 pinned to
the end 0f the Stem Il and abutting against the
end face of the bushing 1. The bushing 7 1S ~
provided with a flange Il which butts against
the inner adjacent face of the casing I preventing
the bushing advancing.
Mounted upon the projecting end of the bush- v
ing `| iSaSeeOnd insulating bushing l5 Which pl‘o- 40
`jects rearwardly and through the opening 6 and
is provided with shoulders I6 and I'I. The bush
inf.’ l5 iS held in position by means 0f the metal
bushing I 8 which is adjustably held in position
by threads cooperating with the threads of the 45
opening 6. The bushing I8 is provided with a
flange I9 which butts against the adjacent outer
face of the casing I. 'I'he inner face of the bush
ing I8 engages the shoulder I6 on the insulating
bushing I5, thus ñxedly holding the bushing I5 50
in advanced position and in turn ñxedly holding
the bushing ‘l in its advanced Position.
Mounted within the bushing I5 at its rear end
is a collar 20 having a projecting stem 2l which
is semi-circular >and cross-section. Secured to 55
the stem 2| by means of a bolt 22 is a cable
tactor, the first and second bushing insulating
the conductors from the support and means to
connecter 23. The cable connecter has a flange suspend the support from a car.
24 which holds the cable connecter '23 and the
2. An electrical connecting device comprising
parts 20 and 2| against longitudinal movement ‘ a metallic support having a front wall and a rear
relative to the insulating bushing I5. '
wall and registering openings through the walls,
The conducting portion 25 of the cable 26 is insulating bushings extending through the open
secured in the socket portion of the connecter ings, means to hold the bushings in ñxed rela
23 and in order to maintain the connection free tion to the support, a terminal member at one
from dirt, moisture, etc., a flexible rubber sleeve end of one bushing and projecting Within and
21 is secured to the end of the bushing I5 by
10 means of a clamp 29 and is secured to the outer without the bushing and having means to re
ceive a cable, an insulating bushing to protect
surface of the cable insulation 29 by means of a the last said means, a reciprocating contactor
clamp 30.
mounted within one end of the other bushing and
In order to electrically connect the cable 26 projecting from the bushing, the bushings insu
to the contact 9, I employ a plurality of very lating the terminal member and contactor from
flexible conductors 3| having their ends secured the support, means to yieldingly hold the con
to the members I3 and 20 as by means of welding tactor in its advanced position to engage a con
or through the medium of a soldered connection. tactor on a counterpart device, ñexible means
These flexible members 3| permit reciprocating positioned within the bushings to electrically con
20 movement of the member 9 relative to the casing nect the contactor and the terminal member.
I, The members |3 and'20 might be electrically
3. An electrical connecting device comprising
connected by means of an interposed helical a metallic support member having a front and a
spring, but such a connection would be of very rear wall with registering openings through the
low efliciency and would not conduct large cur
walls, an insulating bushing extending through
25 rents which applicant’s construction is intended the openings, a reciprocating contactor mounted
for and which it will accomplish eilïlciently. ,
in the said bushing at one end thereof and insu
In order to maintain the abutting surfaces of lated from the support member by the bushing,
I0 in as clean a condition as the contactor projecting from the end of the
' the contactor heads
possible, I mount upon the projecting front end bushing, means to yieldingly advance the con
30 of the bushing 1 a’ñexible rubber sleeve 32 held tactor into engagement with a contactor on a
in place by the clamp 33. The bushing 32 abuts cooperating connecting device and maintain said
against the corresponding bushing on the coun
engagement, means to support the said support
ter-part coupler and the tendency is for these memberv and to cooperate with like means on a
bushings to buckle more or less as shown in
Fig. 3, thus insuring a sealed joint.
By comparing the construction shown in Figs.
'2 and 5, it will be apparent that the cable ycan
not inñuence in any >manner the movement of
the contactor 9. The members 3| are so ñexlble
that they readily yield under the reciprocal move
ment of the contactor 9.`
cooperating connecting device to yieldingly hold
the connecting device in operative relation,
means on the bushing to engage one wall and ad
justable means cooperating with the other wall
to engage the bushing to hold the bushing
mounted in position in the wall openings, a con
necter mounted Within the bushing adjacent the
end remote from the contactor, a ñexible mem
Modiñcations will suggest themselves to those ~ ber positioned within the bushing and connect
skilled in the art basedupon my disclosure and, ing the contactor and connecter, means on the
therefore, I wish to be limited only by my claims. connecter~to receive a cable and the end of the
I claimz-
1. An electrical connecting device .comprising
a metallic support having a front and a rear
Wall and registering openings through the walls,
an insulating bushing extending through one
opening, a second insulating bushing extending
60 through the other opening and held in position
by a bushing threadedly secured in the said other
opening, the last said bushing holding the said
second bushing against longitudinal movement
in one direction and the said second bushing
55 holding the said first bushing against longitudinal
movement in the same direction and the first
bushing held against longitudinal movement in
bushing extending beyond the connecter to en
close the connection oi the cable to the con
4. An electrical connecting device comprising a
metallic support having a front wall and a rear
wall and registering openings through the walls,
an insulating bushing extending through the
openings, means to hold the bushing in ñxed re
lation to the support, a terminal member at one
end of the bushing and projecting within and
without the bushing and having means to receive
a cable, a reciprocating contactor mounted with
in and projecting without the other end of the
bushing, the bushing insulating the terminal
the other direction by the support, the ñrst bush ' member and the contactor from the metallic sup
ing forming an apertured opening within the port, means to yieldingly hold the contactor in
second bushing, a cable connecter secured to the its advanced position to engage a contactor on
rear end of the said second insulating bushing a counterpart device, flexible means positioned
against longitudinal movement in either direc
within the bushing to electrically connect .the
tion, a reciprocating contactor mounted in the contactor and the terminal member, and a ilexi
65 first said bushing and projecting into the said ble bushing surrounding the exposed end of the
second bushing, means on the reciprocating con
contactor but leaving the end face of the con
tactor and engaging the said shoulder of the
tactor exposed, the flexible bushing engaging a
like bushing on a counterpart device to- protect
two contactors while in engagement.
ñrst bushing to limit movement of the con
tactor in one direction, and a spring yleldingly
holding the contactor in its advance position, ñex
ible means within the second bushing electrically
connecting the cable connecter and the con
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