Improvements in Apparatus for Locking Adjustable Seats in Dog-carts and other Vehicles.
Year: 1894

page_text: Date of Application, 17th Apr., 1894
Complete Specification Left, 16th Jan., 1895-Accepted, 16th Feb., 1895
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Locking Adjustable Seats in
Dog-carts and other Vehicles.
I, GEORGE DENNIS SAMPSON of 8 Holland Villas Road, Kensington, Loudon, W.
Retired Captain in the Army, and Justice of the Peace do hereby declare the
nature of this invention to be as follows:-
In dog carts and other vehicles having adjustable seats, screws and other devices
are used for locking the seats in position after adjustment, and girders or boards are
necessary across the trap to strengthen the sides. The object of my invention is to
provide a rapid and secure means of effecting this result and to render girders &c.
unnecessary. For this purpose, with slides on which the seat moves I combine a
crank shaft with connecting rods hooked over or engaged with aforesaid slides,
adapted, so that when the connecting rods are extended outwards by the cranks to
their fullest extent, the seat to which the crank-shaft and connecting rods are
attached is free to move on the slides for adjustment; but when the connecting rods
are drawn inwards or contracted by the partial rotation of the crank shaft, the
hooked extremities bind on the slides, thus locking the seat and the sides of the
vehicle together. The crank shaft may have a handle at each end to be operated
on from either the front or back of the seat.
Improvements in Apparatus for Locking Adjustable Seats in
Dog-carts and other Vehicles.
I, GEORGE DENNIS SAMPSON, of 8, Holland Villas Road, Kensington,
London, W. Retired Captain in the Army, and Justice of the Peace, 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 the following
statement :--
In dog-carts and other vehicles having adjustable seats, screws and other
devices are used for locking the seat in position after adjustment, and girders
or transoms are necessary across the trap to strengthen the sides. The object of
my invention is to provide a rapid and secure means of effecting this result and to
render girders &c. unnecessary. For this purpose with slides on which the seat
moves I combine a crank shaft with connecting rods hooked over or engaged with
aforesaid slides adapted so that when the connecting rods are extended outwards by
the cranks to their fullest extent, the seat, to which the crank shaft and connecting
rods are attached, is free to move on the slides for adjustment, but when the
connecting rods are drawn inwards or contracted by the partial rotation of the
crank shaft the hooked extremities bind on the slides, thus locking the seat and
the sides of the vehicle together. The crank shaft may have a handle at each end
to be operated on from either the back or front of the seat.

page_text: In carrying out my invention I adopt the following arrangements :-
Referring to the accompanying drawing, Fig. 1 is a plan of the under-side of the
moveable seat. No. 2 is a front view.
a is the crank shaft revolving in bearings c c c. a and a are two or more
cranks placed at opposite sides of the crank shaft a. bb are connecting rods
engaging with the crank throws a a, and are provided with a screw or other length
adjustment. The other ends of the connecting rods bb are curved over or formed
with a hook, that engages with the bar or slides ff, which are fixed to and form
part of the side of the vehicle. Projections d d on the under-side of the seat form
guides for the hooked ends of the connecting rods. When the crank shaft a is
revolved by the handles g g placed at the front and back of the seat until the cranks
extend their connecting rods to their fullest extent the hooked ends will cease to
engage with the bar. or slide f, and the seat will be free to be lifted out of the
vehicle or moved backwards or forwards for adjustment in position. When the crank
shaft is revolved towards its opposite dead centre the connecting rods are drawn
inwards by the crank, causing the hooked ends to engage with the bar or slide f
and press the connections d d hard against the slide f, thus locking the seat in its
then position. A suitable stop is placed to arrest the handle in this position.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, I declare that what
I claim is
The particular construction and arrangement of locking apparatus for adjustable
vehicle seats, substantially, as described, and for the purposes set forth.
Dated this 15th of January 1895.
GEORGE DENNIS SAMPSON.