Improvements in or relating to Brakes for Vehicles.
Year: 1890

page_text: Date of Application, 27th Feb., 1890-Accepted, 12th Apr., 1890
COMPLETE SPECIFICATION.
Improvements in or relating to Brakes for Vehicles.
A communication from ADOLF KRETZSCHMAR, of Johann Meyer Strasse, Dresden,
Saxony, Locksmith.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
M.I.M.E., 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 object of this invention is an arrangement for operating the brake blocks of.
vehicles and differs from the well known contrivances for similar purposes in the
following essential features ;-1st. A wire cord is passed through a tube and wound
on a barrel as required by means of suitable gear operated by worm gearing; and
2nd, that the whole mechanism is arranged within the carriage.
The operation of the mechanism is as follows ;-
A worm or screw which is rotated by means of a crank has in gear with it a worm
wheel, mounted upon a shaft upon which is also secured the wire cord barrel. This
cord passing through a tube which may be bent so as to fit the shape of the carriage
is connected at its end with the brake lever by means of a rod. A collar secured on
this rod guides the same within a case or chamber enclosing a spiral spring. This
spring is compressed while the brake is applied; but as soon as it is released the
expansion of the spring so affects the lever as to cause the same to withdraw the
brake block from the wheel.
The employment of a feed screw arrangement, in the first place, permits of the
crank-handle being arranged immediately above the driver's box or seat and also
enables the elasticity of springs to be utilized, which the screw spindles hitherto used
did not admit of, inasmuch as they would have required a special device for keeping
the spring compressed so long as the brake was desired to act. As to the employ-
ment of a wire cord, it enables the whole mechanism to be located within the vehicle,
owing to the fact that the said tube may be bent into any shape, so as to accommodate
itself to that of the carriage and that naturally the wire will readily follow the curves
of the said tube.
In the accompanying drawing Fig. 1 is a longitudinal section of this brake the
outline of portion of the vehicle being suggested by dotted lines. Fig. 2 is a sectional
side view of the worm gearing the case being in longitudinal section. Fig. 3 is a
top view of the said gear the case being there shown in horizontal section, and Fig. 4
shows the method of connecting the wire cord and brake lever with the chamber or
socket enclosing the spiral spring which is shown in section.
The case a arranged underneath the driver's box or seat contains the worm b on
whose shaft b the crank handle c is fitted. It also contains the wheel d gearing with
the worm b and secured to shaft d¹ upon which is also mounted the barrel e
whereon the cord of is wound. This cord is enclosed in tube g which is attached
to the body of the vehicle by means of staples or hold-fasts of any suitable
description.
Tube g at one end terminates in the socket or chamber h wherein the spiral
spring is contained. Spring k meets and acts upon a collar m provided upon
the rod one of the ends of which is provided with or bent into the shape of a
hook engaging a pin i at the end of the cord and thereby effecting the con-
nection between the said rod and cord; while the opposite end of the said rod
is forked or yoke-shaped so as to engage the brake lever n.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me by my
foreign correspondent, I declare that what I claim is ;-
1. An improved device for operating brakes of vehicles characterized by the
arrangement of worm gearing such as b d in combination with a tube such as g
bent into any desired shape and enclosing a cord or equivalent f and with a chamber
or socket enclosing a spring for the purpose of having the mechanism within`
the carriage and enabling the brake blocks to withdraw from the wheels under, the
action of the spring as soon as the brake. is released substantially as herein described
and illustrated in the accompanying drawings.
2. The arrangement and combination of parts constituting the complete vehicle
brake substantially as herein described and illustrated in the accompanying
drawings.
Dated this 97th day of Fahmi 1800
W. P. THOMPSON & BOULT,
Agents for the Applicant.