close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2136938

код для вставки
Nov. 15, 1938.
B. G. COOPER
2,136,938
TROLLEY CURRENT COLLECTOR
Filed Dec. 11, 1957
ab
‘27' 2Q
25
2o
Igj
22
:3:
2|
\
‘
v
LW
i
l_
~
'
,
29/
'
579.2
20
qm/ ’
I
24
Y
28
>
I
m \IG
fNl/ENTOR.‘
*a
_
'
30-
BENJAMIN G.CooPER,
BY
>
2,1363%
Patented Nov. 15, 1938
UNITED STATES PATENT OFFICE
2,136,938
TROLLEY CURRENT COLLECTOR
Benjamin G. Cooper, Columbus, Ohio, assignor to
The Jeffrey Manufacturing Company, a corpo
ration of Ohio
Application December 11, 1937, Serial No. 179,350
2 Claims. (C1. 191-—59.1)
This invention relates to a trolley current col ' pivotal movement about an upright axis a harp
lector and an object of the invention is to pro - 22 pivotally attached thereto by an upwardly ex
tending bolt 23,
vide such a device including a non-rotary collect
Rigidly but removably attached to the upper
ing shoe which is held with a current collecting
end of the harp 22 is a sliding or non-rotary cur OX
surface
substantially
horizontal
as
said
shoe
5.
rent collecting shoe 25 having a smooth longi
moves Vertically.
Other objects of the invention will appear tudinally extending groove 26 presenting an aphereinafter, the novel features and combinations preciable bearing area which makes sliding con
tact with a trolley. wire 21.
being set forth in the appended claims.
It is to be noted that contact between the
In the accompanying drawing,
10
Fig. 1 is a side elevational view of the device trolley wire 21 and the bottom of groove 26 is
along a substantially horizontal line and the ob
comprising my invention; and
ject of the invention is to maintain the shoe 25
Fig. 2 is a sectional view taken on the line 2-2
of Fig. 1 looking in the direction of the arrows. in parallelism with the position illustrated re
It has been found in practice that where the gardless of any vertical movement thereof. In 15
sliding or non-rotary type of collector shoes are other words, to insure a maximum contact area
employed to collect current from a trollery wire
there is a tendency for the trolley wire contacting
area of the shoe to- wear very unevenly due to
20 the sliding frictional forces which tend to rotate
the shoe, which tendency is particularly notice—
able in the wearing away of the shoe along the
trailing edge. The device comprising my inven
tion maintains the sliding surface of the shoe
against such rotary movement and requires it to
move in parallelism with said surface substan
tially horizontal at all times as said shoe moves
upwardly and downwardly in response to varia
30
tions in the height of the trolley wire.
As illustrated in Figs. 1 and 2 of the drawing,
the trolley current collector comprising my in
vention is formed by a base II] which is rigidly
attached to the car or locomotive to which the
current is to be conducted. Mounted for rota
tion about an upright axis upon the base it] is
a yoke II to which is pivotally attached for
movement about a horizontal axis a bottom
socket l2 pivoted to said yoke II by a pin l3
and receiving the bottom portion of a trolley
40 Pole 14. The trolley pole M and the socket [2
are urged to rotate in a counter-clockwise direc
tion about the pivot pin l3 by spring mechanism
including a bolt 15 trunnioned in the yoke I I,
which mechanism preferably takes the form of
as Ur the trolley mechanism disclosed in the patent
' to Nils D, Levin, No. 1,199,283 dated September
26, 1916.
Adjacent its upper end the trolley pole 14 car
ries an upper socket l6 which is removably at
50 tached to said pole by a bolt I1 and has con
nected thereto an electric cable l8 by clamping
means [9. The upper end of the socket l6 pro
vides a yoke formed by spaced side plates 20, 20
between which is pivoted a casting or carrier 2|
55 by a horizontal pin 24 to which is attached for
between the shoe 25 and the trolley wire 21 and
thus to provide for even wearing on the shoe
and a minimum of wear on the trolley wire and
shoe it is desirable to maintain a maximum of 20
contacting area therebetween at all times. This
is accomplished by the structure of my invention.
Formed as an integral portion of the casting
or carrier 2| and extending downwardly from
the pin 24 is a lever or arm 23 which is pivotally
attached by a pin 29 to a link 30, the lower end
of which is pivotally attached by a pin 3| to the
yoke l I. It is tobe noted that the yoke ll, trolley
pole l4, lever or arm 28 and link 30, together with
the pins I3, 24, 29 and 3|, form a parallel link
mechanism in that the distances between the
axes of pins I3 and 3| on the one hand and pins
24 and 29 on the other are equal and in that
the distances between the axes of pins 13 and
24 on the one hand and 29 and 3| on the other 35
hand, are equal.
It is thus evident that as shoe 25 moves up‘
wardly and downwardly to accommodate itself
to the varying height of the trolley wire 21 it will
be maintained in a substantially horizontal posi 110
tion at all times, thus insuring the maximum
contacting area between the trolley wire 21 and
the groove 26 of said shoe 25 at all times. As
above pointed out, this greatly prolongs the life
of the shoe 25 as well as the life of the trolley 45
wire 21 because the wear on each is maintained
at a minimum.
It is also to be noted that by virtue of the
pivotal connection provided between the carrier
21 and the harp 22 by the pivot bolt 23 said shoe 50
25 is pivotally mounted about an upright axis
which is always substantially vertical.
This parallel motion mechanism is. of particu
lar importance where a sliding shoe 25 is em
ployed as distinguished from a roller because the 55
2
2,136,938
problem of making contact over an extended lon
nected at one end to said base and at the other
gitudinally extending area of the trolley wire is end to said means, said pivotally connected mem
presented by a sliding shoe but not by the rolling ‘ bers forming a positive parallel motion mecha
contact afforded by a trolley wheel.
nism constructed and arranged to maintain said
Obviously those skilled in the art may make shoe horizontal during upward and downward
various changes in the details and arrangement movement thereof.
of parts without departing from the spirit and
2. In a current collector, the combination with
scope of the invention as de?ned by ,the claims _a base, of a, pair of upwardly inclined links in
heretoapp?nded, and I therefore wishnot 1to be ~cluding a. trolley pole pivoted ,to said base on
10 restricted to the precise construction herein dis
parallel horizontal axes, an arm pivotally mount
closed.
led on the upper end of said links cooperating
Having thus described and shown an embodi
therewith to form a positive parallel motion
ment of my invention, what I desire to secure by mechanism, a non-rotary current collecting shoe
Letters Patent of the United States is:
having a substantially horizontally extending
15
1. In a current collector, the combination with concave trolley wire contacting area in the top
a base, of a trolley pole pivoted thereto on a thereof, and means connecting said shoe for
horizontal axis, a non-rotary current collecting movement with said arm and providing for piv
shoe having a substantially‘horizontally extend
otal movement between them on a vertical axis,
ing concave trolley wire contacting area in. the saidmechanism maintaining said shoe horizontal
top thereof, means rigidly attached to said shoe during movement thereof.
and pivotally connecting said shoe to the upper
end of said trolley pole, a link pivotally con
BENJAMIN G. COOPER.
Cl
10
15
20
Документ
Категория
Без категории
Просмотров
0
Размер файла
254 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа