mprovements in Self-acting Brakes for Railway Platform Trolleys and the like.
Year: 1898

page_text: Date of Application, 27th Sept., 1898
Complete Specification Left, 27th June, 1893-Accepted, 5th Aug.,
1899
PROVISIONAL SPECIFICATION.
mprovements in Self-acting Brakes for Railway Platform Trolleys
and the like.
I, HAYDON PARKER, of 54, Avenue Road, Forest Gate, in the County of Essex,
Railway Coach Maker, do hereby declare the nature of this invention to be as
follows:-
My invention consists in the application of self acting brake devices to railway
platform trolleys and the like for the purpose of preventing the accidental or
spontaneous motion of the trolley whereby accidents sometimes occur, and also
for the purpose of selfactingly controlling the motion of the trolley when
descending a decline. The hind wheels or front wheels are provided with brake
blocks, which by suitable spring or weight device are normally held hard against
their wheels but which can be readily released therefrom by lever or other gear
arranged at the end or ends of the trolley.
In one form of apparatus I suspend a brake block against each front wheel
and connect them by a cross bar which by a rod suitably fitted with right and
left hand wing nut for length adjustment to take up wear on block is connected
to one arm of a bell crank lever at the rear of the trolley. The rod passes through
a bracket fixed under the floor of the trolley and a coil spring is provided between
the bracket and a stop on the rod, said spring (or it might be a weighted lever)
tending to normally hold the brake blocks hard on to the wheels. The other
arm of the bellcrank lever is by a rod connected to a horizontal lever so arranged
at the end top bar of the trolley that the operator's hand can readily grasp it
while at the same time pushing against the said top bar for propelling the trolley.
The action is such that so long as he retains it in his grasp while thereby push-
ing it against the top bar the brake blocks are kept off so that he can push the
trolley along easily against the action of the spring or weight but when he releases
his grasp or leaves the trolley, the spring puts on the brakes self actingly.
If brake blocks are fitted to the hind wheels which usually are on a swivelling
axle I in one form make the fork bars hollow and provide for each an internal
rod fitted below with a brake block and loaded with a spring for normally hold-
ing the brake block on, lever or other gear being provided for raising the brake
block rods to take the brake off when desired.
.
ca 1900

page_text: Improvements in Self-acting Brakes for Railway Platform Trolleys
and the like.
I, HAYDON PARKER, of 54, Avenue Road, Forest Gate, in the County of Essex,
Railway Coach Maker, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
My invention consists in the application of selfacting brake devices to railway
platform trolleys and the like for the purpose of preventing the accidental or
spontaneous motion of the trolly whereby accidents sometimes occur, and also
for the purpose of selfactingly controlling the motion of-the trolly when descend-
ing a decline. The hind wheels or front wheels are provided with brake blocks,
which by suitable spring or weight device are normally held hard against their
wheels, but which can be readily released therefrom by lever or other gear
arranged at the end or ends of the trolley.
In order that my invention may be better understood and more readily carried
into effect I will describe it with reference to the accompanying drawings in
which the same letters refer to the same parts or substitutes therefor in the
several figures.
Figure 1 is a side elevation of a platform trolley fitted with automatic brake
according to my invention. Figure 2 is an end view of same, and Figure 3 is
a plan.
In one form of apparatus I suspend a brake block a against each front wheel
and connect them by a cross bar b which by a rod c suitably fitted with right
and left hand wing nut d for length adjustment to take up wear on blocks a
is connected to one arm of a bell crank lever e at the rear of the trolley. The
rod c passes through a bracket f fixed under the floor of the pulley and a coil
spring is provided between the bracket and a stop gl on the rod, said spring g
(or it might be a weighted lever) tending to normally hold the brake block a
hard on the wheels. The other arm of the bell crank lever is by a rod h connected
to a horizontal lever j so arranged at the end top bar of the trolley that the
operator's hand can readily grasp it while at the same time pushing against the
said top bar for propelling the trolley. The action is such that as long as he
retains it in his grasp while thereby pushing it against the top bar the brake
blocks a are kept off so that he can push the trolley along easily, against the
action of the spring g (or weight) but when he releases his grasp or leaves the
trolley, said spring g puts on the brakes selfactingly.
In Figures 4, 5, and 6 which are, respectively, side elevation, end view and
plan, of an alternative arrangement in which the brake blocks can be released
from either end of the trolley, the brake blocks a are connected, through the
crank bon rod b, by means of rods c and c¹ to the uprights h and h¹ respectively
at opposite ends of the trolley said uprights being centered at f f¹ to brackets k k¹
fastened to the trolley frame. are the operating handles on uprights h h¹
respectively, the action being the same in this case as described with reference to
Figures 1 to 3 inclusive, i.c., while the operator pushes against either of the
handles or the connecting rod c, or c¹ as the case may be, is operated to release
the brake blocks a from the wheels; immediately the pressure is taken off the
handle (or ) a reverse movement of the rods c c¹ takes place. In this case
the brake blocks are held on by gravity.
If the brake blocks are fitted to the hind wheels which are usually on a
swivelling axle, I, in one form make the fork bars hollow and provide for each

page_text: an internal rod fitted below with a brake block and loaded with a spring for
normally holding the brake block on, lever or other gear being provided for rais-
ing the brake block rods to take off the brake when desired.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim is:
In railway platform trolleys automatic brake apparatus arranged and operating
substantially as herein set forth with reference to the accompanying drawings.
Dated this 27th day of June 1899.
JOHN P. O'DONNELL, Fel. Chart. Inst. P.A.,
Agent for Applicant,
70 and 71, Palace Chambers, Westminster, S.W.
JOHN P. O'DONNELL, Fel. Chart. Inst. P.A.,
Agent for Applicant,
70 and 71, Palace Chambers, Westminster, S.W.