Year: 1893

page_text: Date of Application, 16th Feb., 1893-Accepted, 27th May, 1893

page_text: With equal obstacles and an equal load, the pulling force required when accessory
wheels are used is only about one-half that necessary when they are not employed
for lifting the axle of the main wheels as described.
The number and arrangement of the accessory wheels differs according to the
In small
kind of vehicle, its construction and the purpose for which it is intended.
hand-carts, a single accessory wheel b', shown in dotted lines in Fig. 3, may be
fitted between the two main wheels. In the case of large two-wheel hand-carts,
it is better to employ two accessory wheels, moving independently; the supports i
being so formed and placed that they strike the forked arms g g a little above the
axles of the accessory wheels, whereby a complete tilting over of the cart is
prevented. These supports, being shorter than the usual supports, do not.prevent
the raising and lowering of the shafts of the cart.
In hand-carts which are pushed instead of pulled, an easy passage over obstacles
can also be obtained in another manner by placing both the accessory wheels behind
the main wheels (as in Fig. 4), and letting the supports i rest on the forked
arms gg. By pressing down the shafts of the cart about the axis of the accessory
wheels h, the main wheels can be lifted and the cart allowed to run on the accessory
wheels until the main wheels have passed over the obstacle, whereupon the shafts
are raised and the accessory wheels pass the obstacle without difficulty.
In vehicles with two main axles, each main wheel has an accessory wheel; each
pair of accessory wheels, as shown in Fig. 9, being connected together by a rope
running round a loose pulley which is coupled to the traces of the harness. By
this arrangement, each accessory wheel is enabled to move freely and independently
of the one to which it is connected.
By suitable contrivances or means for attaching the lugs d, or by the use of
brackets, as shown in Figs. 10 and 11, for carrying the shaft, accessory wheels
with the requisite auxiliary parts can be applied to any vehicle already made.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I claim :-
:―
1. The improved means for enabling vehicles to overcome obstacles arranged
or operating substantially as described with reference to the accompanying
drawings.
2. In vehicle of all kinds, the employment of accessory wheels carried by forked
arms pivoted to the vehicle, the accessory wheels and arins being acted upon, when
required, by a draw-rope for the purpose of enabling the vehicle to surmount
obstacles lying in the way, thus necessitating the expenditure of a comparatively
small tractive force.
3. In two-wheeled vehicles furnished with accessory wheels of the kind herein
referred to, the employment of supports which catch against the forked arnis
wherein the accessory wheels are mounted, thus supporting the vehicle, substantially
as described with reference to the accompanying drawings.
'
Dated the 11th day of February 1893.
G. G. M. HARDINGHAM,
191, Fleet Street, London, E.C., Chartered Patent Agent.