Automatic Locking Appliance for Hand Trolleys.
Year: 1899

page_text: Date of Application, 1st Mar., 1899
Complete Specification Left, 19th July, 1899-Accepted, 9th Dec., 1899
PROVISIONAL SPECIFICATION.
Automatic Locking Appliance for Hand Trolleys.
JOHN FRYER UPHILL, 2, Lyndhurst Road, Oldfield Park West, Bath,
Engineer, do hereby declare the nature of this invention to be as follows:-
A metal cam from twelve to eighteen inches in diameter variable with the
size of trolley with a rim from flat to hight of convex, about one and half
inches, and threequarters of an inch thick, the rim is partly convex, two convex
parts opposite each other, two concave ditto, this cam is fixed on the underside
of trolley with the usual centre pin, the rim of cam resting on two metal
rollers, to run on rim of cam, fixed on the frame atached to the front axle
with ordinary wheels and handle, the convex part of cam resting on two metal
rollers when the trolley is in use the trolley must be drawn by the handle, but
on releasing the handle the weight of cam and trolley by a graduated decline
cause the rollers and frame to travel to the concave part of cam, and causes
the trolley to slightly drop in front, and thereby bringing the two front wheels
in a opposite position to the back wheels causing the trolley to selflock and
remain stationary.
Automatic Locking Appliance for Hand Trolleys..
JOHN FRYER UPHILL, 2, Lyndhurst Road, Oldfield Park, West Bath,
Engineer, 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:-
A metal cam from twelve to eighteen inches in diameter variable with the
size of trolley with a rim from flat to hight of convex, about one and half
inches and threequarters of an inch thick the rim is partly convex and partly
concave two convex parts opposite each other two concave ditto, this cam is
fixed on the under side of trolley with the usual centre pin fixed, the rim of
cam resting on two metal rollers, to run on rim of cam fixed on the frame
attached to the front axle with the ordinary wheels and handle, the convex part
of cam resting on two metal rollers when the trolley is in use the trolley must
be drawn by the handle but on releasing the handle the weight of cam and
trolley by a graduated decline cause the rollers and frame to travel to the con-
cave part of the cam, and causes the trolley to slightly drop in front, and thereby
bringing the two front wheels in an opposite position to the back wheels causing
the trolley to selflock and remain stationary.

page_text: Fig. 1, front of trolley when travelling, A convex part of cam resting on C
two metal rollers, B usual centre pin fixed to cam, D concave part of cam.
Fig. 2, rim of cam threequarters of an inch thick A convex part of cam one
and half inches high D concave part of cam half inch high.
Fig. 3, prospective view of cam, size of cam. from twelve to eighteen inches
in diameter according to size of trolley.
Fig. 4, side of trolley when locked showing D concave part of cam resting
on C two metal rollers, with the two front wheels of trolley brought in an
opposite position to the back wheels causing the trolley to selflock. and remain
stationary, B usual centre pin fixed to cam, A convex part of cam.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
99.
JOHN FRYER UPHILL.
2, Lyndhurst Road, Oldfield Park, W., Bath.