Improved Means for Starting Tram-cars and other Vehicles.
Year: 1890

page_text: Date of Application, 13th Sept., 1890-Accepted, 18th Oct.. 1890
COMPLETE SPECIFICATION.
Improved Means for Starting Tram-cars and other Vehicles.
We, WILHELM BUSCHBAUM and FRITZ HOLLAND, Manufacturers of Linden before
Hanover, Germany do hereby declare the nature of this invention and in what manner
the same is to be performed, to be particularly described and ascertained in and by
the following statement:-
The present invention has reference to a traction arrangement worked by the
brake, for tramway cars, carriages and the like in which, by putting on the brake,
the draw-rod is drawn backwards out of its real position in such manner that a hook
which is link-jointed with it slides with a tooth of a spur wheel attached to the
wheel axle. When the horses pull again, by the bringing back of the draw bar into
its real position, the spur wheel and with it the wheels. are transposed by a quarter
turn and the traction of the car is then rendered easier for the horses.
An arrangement carried out according to the idea of this invention is represented
in inserted position, in section and plan at Figs. 1 and 3; and in disconnected
position in section at Fig. 2 of the accompanying drawings.
The draw-bar a, provided at a¹ with the swing bars, is connected with one end of a
lever b the other end of which is pivoted at 1 to the cross beam of the carriage
frame A. The middle part of this lever is link-jointed by a rod c, at f, with a
hook d, which lies above a spur wheel e attached to the wheel axle. Besides this
there is fixed under the rod c a roller g resting in a bearing g' fitted to the cross
beam 2 of the frame A and the rod c itself is provided with a spring / fixed to the
cross beam 2. Under the stem of the hook d there is a crank brace o, resting in the
bearings o¹ which is attached to a rod n going to the front part of the car.
From the brake i (Fig. 3) a chain k runs over a pulley or drum to the draw-
rod a and is fixed to a loop m on the latter. The draw-rod a has also on it a tappet p
which, when the rod is drawn forward, lies against the roller 9 of the carriage
frame.
The arrangement works in the following manner :
So soon as the driver applies the brake, the draw-bar a is, by the chain k moved
backwards out of the real position indicated in Fig. 2 and brought into position as
represented in Figs. 1 and 3 so that now the hook d, pushed backwards with its
joint over the roller g, slides into the teeth of the spur wheel e attached to the
wheel axle. When the horses pull again at the swing bars, the movement forward
of the draw-bar a brought about thereby causes a turn of the spur wheel e and
consequently of the wheel axle with its wheels until the tappet p lies before the drum q.
The arrangement is then in the position indicated in Fig. 2; because by the forward
movement of the draw-bar a the joint fis pushed forward over the drum g whereupon
the spring lifts the hook d from off the teeth of the spur wheel e. The horses now
draw the car forward in the usual manner by the draw-rod a.
By the arrangement before described, therefore the wheels are turned, before the
traction of the car in the usual way, by means of the action of the horses on the
spur wheel fixed to the wheel axle; and the pull of the horses is thus very much
alleviated. If in changing the horses it is desired to disconnect the traction
arrangement, it is only necessary to pull the rod n; the hook d will then be removed
from the spur wheel e by the crank brace o.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is―
1. A traction arrangement for tramway cars or the like, the characteristics of which
P

page_text: position in such manner that a hook (d) link-jointed with it slides into a tooth of
a spur-wheel (e) fixed to the axle so that, when the horses pull again, and the draw-bar
is brought back to its original position, a turn of the axle is effected and the drag on
the horses is consequently alleviated, substantially as hereinbefore described and
shown on the annexed drawings.
2. In apparatus of the class herein before described the arrangement of a roller (9)
and a spring (h) in connection with the jointed hook d, for the purpose of effecting
an automatic lifting of the hook d from the spur-wheel e after the draw-rod has been
brought back into its normal position, substantially as hereinbefore set forth.
3. In apparatus of the class hereinbefore described the arrangement of a crank
brace (o) to be worked from the front part of the car, underneath the jointed hook d
for the purpose of lifting the book off the spur wheel e, substantially as hereinbefore
set forth.
Dated this 12th day of September 1890
H. D. FITZPATRICK,
70, Wellington Street, Glasgow, Agent.