Improvements in Brake Mechanism for Railway and other Vehioles.
Year: 1896

page_text: Date of Application, 10th Aug., 1896
Complete Specification Left, 8th May, 1897-Accepted, 26th June, 1897
PROVISIONAL SPECIFICATION.
Improvements in Brake Mechanism for Railway and other Vehioles.
We GEORGE INGERSOLL ROOT of Main Street Civil Engineer and ARTHUR BEGG
of William Street Inventor, both of Ottawa, Province of Ontario, Canada, do
hereby declare the nature of this invention to be as follows:-
The brake mechanism of this invention comprises a frame fixed to and projecting
downward through the floor of the vehicle. In this frame is journallel a vertical
drum in connection through a chain with the brake block or lever. The drum is
provided internally with a quick threaded screw in which is fitted a screw rod so that
it may work vertically up and down but without turning in the drum. Upon the top
of the drum is fixed a ratchet wheel which is engaged and held by a pawl when the
drum is wound up to put on the brake. The screw rod extends upward through a
casing from the top of which it is worked up and down by a hand lever either to
release or put on the brake. The bottom end of the screw rod is protected by a socket
piece into which it enters when said rod is moved down to turn the drum.
releasing the brake the pawl is first released from the teeth of the ratchet wheel by
pushing it with the foot. The upper part of the drum may be carried on a ball
bearing provided between a flange on the drum and a plate fixed to the floor of the
vehicle.
Dated this 10th day of August 1896.
In
THOMAS R. SHILLITO,
89 Chancery Lane, London, W.C., Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Brake Mechanism for Railway and other Vehicles.
We GEORGE INGERSOLL ROOT, of Main Street, Civil Engineer, and ARTHUR BEGG,
Inventor, of William Street both of Ottawa, Province of Ontario, Canada, 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 brake of this invention is shewn in the accompanying drawing Fig. 1 being
a sectional elevation thereof without the brake shoe and lever. Fig. 2 a somewhat
similar view on an enlarged scale. Fig. 8 a horizontal section on line 3-3 giving a
top view of the ratchet."
D is a chain drum formed with shoulders d", d" and journals d, d', held in suitable
bearings which permit a rotary and prevent a linear motion. For this purpose the
upper journal d, the drum being usually held in a vertical position, may be journalled
in a suitable opening in the floor of the vehicle platform P or, as shewn, in a base
plate F formed with a suitable journal bearing f secured to said floor. A step S is
carried on a suitable bracket such as B secured to the underside of the platform.
Said step may be provided with a downwardly projecting sockets. Ball bearings
such as F, S, may be provided within the journal of the base plate and step to reduce
the friction due to lateral and vertical pressure respectively.
The drum D is provided with a lug or other projection de to which the end of the
brake chain C adapted to coil upon said drum, is secured. A pulley or guide roller C¹

page_text: may be provided on the bracket B over which said chain passes to the brake lever
operating the shoe. (Not shewn in the drawing.) The upper journal d of the drum
is extended to adapt it to receive and carry a ratchet wheel R. This may be secured
by a key or the extension d may be made square and a pin or set screw used to
prevent ready separation. A pawl R¹ adapted to engage said ratchet wheel and
prevent the drum uncoiling, is pivotted upon an extension of the base plate.
Through the centre of the drum D passes a round rod or spindle G in the lower
part of which a series of very steep screw threads g are cut, the bore of the drum
being provided with corresponding threaded nut or guide which the rod fits. Said
rod has a vertical or linear motion only and not a rotary one, and its lower end passes
into the sockets of the step, which is of larger bore and merely acts as a protection
to the lower end of the rod.
Upon the base plate F is secured or formed a hollow post F or it may be separate
and secured to the platform or floor F direct. This acts as a casing to the rod G the
upper smooth end of the latter having a bearing in a bore in the upper closed end f"
of the post. At the rear of the post is an upwardly projecting lug to which is
pivotted a link l. The upper end of the rod or spindle G is formed with a strong
slotted head g in the slot of which is pivotted a hand lever L one end of which is
pivotted to the link 2.
It will be seen that by depressing the hand lever L the drum D is readily rotated,
coiling up the chain Calmost instantly and tightening the brake shoe upon the wheel
or wheels. The pawl R¹ being allowed to engage the ratchet R of the drum, prevents
the latter turning back. When the brake shoe is to be taken off, the pawl R' is
disengaged with the foot and the lever L is raised.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. In a brake for railway and like vehicles the combination of a spindle prevented
from rotating and having a linear movement only and provided with steep screw
threads, a drum suitably journalled to have a rotary movement and prevented from
having a linear motion and provided with a threaded nut or guide fitting the threads
of the spindle and through which said rod passes, a lever suitably fulcrummed and
connected to the non threaded end of the spindle and adapted to operate said spindle
in a linear direction and forcing the same through the drum and causing the same to
rotate, and a chain adapted to coil upon said drum, substantially as described and
shewn.
2. In a brake for railway and like vehicles the combination of a base plate secured
to the floor or platform of a vehicle and adapted to hold one end of a drum rotatively,
a bracket secured to the under side of the floor or platform and adapted to carry a
step for the other end of the drum, a drum having the end of a chain secured to it
and having a ratchet at its upper end and journalled in the base plate and having its
central bore provided with a steep screw thread, a pawl pivotted adjacent to the
ratchet wheel on the drum and adapted to engage the same, ball bearings for the
drum, a spindle having a steep screw thread passing through said drum and prevented
from having a rotary motion, a lever connected to the upper end or head of the
spindle and preventing it from rotating and adapted to impart a linear motion to the
same and a post forming a guide for the upper end of the spindle and having a lug to
which one end of a link is pivotted, the other end of the same being pivotted to the
lever, substantially as described and shewn.
3. The general. combination and arrangement of parts constituting the brake
mechanism for railway and other vehioles, substantially as described and shown.
THOMAS R. SHILLITO,
89 Chancery Lane, London, W.C., Agent for the Applicants.
THOMAS R. SHILLITO,
89 Chancery Lane, London, W.C., Agent for the Applicants.