A New or Improved Car Brake.
Year: 1898

page_text: Date of Application,. 17th Nov., 1898
Complete Specification Left, 19th July, 1899-Accepted, 19th Aug., 1899
A New or Improved Car Brake.
I, HERBERT JOHN HADDAN, of the Firm of Herbert Haddan & Co., of 18,
Buckingham Street, Strand, London, W.C., Civil Engineer, do hereby declare
the nature of this invention, a communication to me from abroad by Münchener
Werkzeugmaschinenfabrik G. Hänsler & Co., of Isarthorplatz 3, Munich, in the
Empire of Germany, to be as follows:-
This invention relates to a car brake consisting of a hand lever and a draw
lever to which a brake rod is joined.
Both these levers being separated one from the other and seated or joined to
a socket like lower end which is provided with a screw threaded spindle fastened
on the car at any suitable place.
The hand lever is provided with a shoulder capable of bearing when turned
in a certain direction against the draw lever so that the hand lever seated upon
the spindle is so close to the draw lever that both are seated tight together.
The effect is then as follows:-In moving the hand lever in the desired direc-
tion such a friction is originated at the junction of the sockets of the respective
levers that by co-operation of the screw thread the draw lever is operated by
the hand lever and the brake consequently worked. On the brake arriving in
this position the counter pressure of the tightened brake block has a tendency
to draw the draw lever back but the latter would be forced to move on the spindle
which is however hindered by the hand lever thereon which is sufficient to hold
the draw lever back in its braking position. This effect is the more intense the
steeper the thread of the spindle is made. The effect of the hand lever on the
draw lever is consequently the same as a counter screw. In pulling the hand
lever, the shoulder thereon pushes against the draw lever pushing it back and
the brake effect is dissolved. The working of the draw brake lever is effected
in one direction of movement by the friction of its plane coming in contact
with the plane of the other lever by the shoulder whereby the friction of the
two planes in the braking position replaces the hitherto used latch or other
locking mechanism, but with more solidity and security.
Dated this 17th day of November 1898.
H. J. HADDAN.
Herbert Haddan & Co.,
Agents.

page_text: the nature of this invention a communication to me from abroad by Münchener
Werkzeugmaschinenfabrik G. Hänsler & Co., of Isarthorplatz 3, Munich, in the
Empire of Germany, and in what manner the same is to be performed to be
particularly described: and ascertained in and by the following statement:
This invention relates to an improved car brake. In the annexed drawing
Fig. 1 is a side view and Fig. 2 a front view partially in section of the improved
brake. The brake consists of a hand lever a and a draw lever to which the
brake rod is joined.
These levers are separated one from the other and are seated by means of
their socket like lower ends, which are screw-threaded, on a spindle c fastened on
the car at any suitable place.
The hand lever is provided with a shoulder d capable of bearing when
turned in a certain direction against draw lever bor a shoulder d' of the same
so that the hand lever a seated upon the spindle c is so close to the draw lever
that both are seated close together at i.
The effect is then as follows:-In moving the hand lever in the desired direc-
tion such a friction is originated at the junction of the sockets of the respective
levers that by co-operation of the screw thread the draw lever bis operated by
the hand lever and the brake consequently worked. On the brake arriving in
this position the counter pressure of the tightened brake block has a tendency
to draw the draw lever b back, but the latter would be forced to move on the spindle c
which is however hindered by the hand lever a thereon which is sufficient to hold
the draw lever back in its braking position. This effect is the more intense
the steeper the thread of the spindle is made. The effect of the hand lever on
the draw lever is consequently the same as a counter screw. In pulling the
hand lever back the shoulder & thereon pushes against the draw lever pushing
it back and the brake effect is stopped. The working of the draw brake lever b
is effected in the one direction of movement by the friction planes i, and in the
other direction by the shoulders whereby the friction of the two planes i in the
braking position replaces the hitherto used latch or other locking mechanism,
but with more solidity and security.
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:
1. A new or improved brake for cars in which a hand lever a and a drawing
lever connected with the brake rod are arranged one behind the other on a
threaded spindle fixed on the car, in such a manner that when turning the
hand lever a the lever bis drawn with it in consequence of the friction exercised
at the parts in contact whilst the friction in the threads prevents voluntary
backward movement.
2. An improved brake for cars as in Claim 1 in which the hand lever a is
provided with a shoulder d capable of bearing when the hand lever is turned in
a certain direction, against the draw lever.
Dated this 10th day of July 1800