Quick Acting Hand Brake for Vehicles.
Year: 1893

page_text: Date of Application, 31st July, 1893
Complete Specification Left, 23rd Apr., 1894-Accepted, 16th June, 1894
PROVISIONAL SPECIFICATION.
A Quick Acting Hand Brake for Vehicles.
I, CARL KEINER, of No. 61 Ober Donau Strasse, Vienna, Austria, Manufac-
turer, do hereby declare the nature of this invention to be as follows:-
My invention relates to a hand brake applicable to carriages of any kind so con-
structed that the first action of the hand causes a considerable movement of the
brake block towards the wheel to which it has to be applied, and then the farther
action of the hand causes the block to be pressed against the wheel. For this
purpose, I connect the brake block to a rod the end of which is formed as a nut to
receive a screwed spindle. This spindle is fitted to slide, without turning, within a
tube which can be turned by a winch handle within a stationary sleeve, but which
is prevented, by a pin engaged in a groove, from moving longitudinally in the sleeve.
To the end of the tube is pivotted the winch handle which besides being capable of
revolving can be turned half round in the plane of the axis of the screw spindle.
By this movement a short arm which projects from the winch and which is connected
by a link to the end of the screwed spindle, effects longitudinal movement of the
spindle, moving the brake block through a considerable distance towards the wheel,
and then, by the revolution of the winch handle turning the tube and screwed
spindle the brake block is farther moved so as to press against the wheel. For
releasing the brake, the two movements of the winch handle are repeated in the
inverse order. It is preferred to interpose a spring between a collar on the screwed
spindle and the end of the tube in which it slides, as this holds the winch handle in
the position in which it is left by the operator, ensuring it against accidental
movement such as might give considerable motion to the brake block.
Dated this 31st day of July 1893.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
A Quick Acting Hand Brake for Vehicles.
I, CARL KEINER, of No. 61 Ober Donau Strasse, Vienna, Austria, Manufac-
turer, 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 :-
I
My invention relates to a hand brake mechanism applicable to carriages of any
kind so constructed that the first action of the hand causes a considerable movement
of the brake block or blocks towards the wheel to which they have to be applied,
and then the farther action of the hand causes the block or blocks to be pressed
against the wheels. For this purpose I connect the brake block to a rod the end
of which is formed as a nut to receive a screwed spindle. This spindle is fitted to
slide without turning within a tube which can be turned by a winch handle within
a stationary sleeve, but which is prevented, by a pin engaged in a groove, from
moving longitudinally in the sleeve. To the end of the tube is pivotted the winch
handle which, besides being capable of revolving, can be turned half round in the
plane of the axis of the screw spindle. By this movement a short arm which
projects from the winch and which is connected by a link to the end of the screwed
DQ77

page_text: .
spindle, effects longitudinal movement of the spindle, moving the brake block
through a considerable distance towards the wheel, and then, by the revolution of
the winch handle, turning the tube and screwed spindle the brake block is farther
moved, so as to press against the wheel. For releasing the brake, the two move-
ments of the winch handle are repeated in the inverse order. It is preferred to
interpose a spring between a collar on the screwed spindle and the end of the tube
in which it slides, as this holds the winch bandle in the position in which it is left
by the operator, ensuring it against accidental movement such as might give
considerable motion to the brake block.
The said quick acting screw brake mechanism is shewn in the accompanying
drawings in which
Fig. 1 shews a longitudinal section, Fig. 2 a side elevation, Fig. 3 a front view
of the crank lever,
Fig. 4 a longitudinal section at right angles to that at Fig. 1,
to the
Figs. 5 and 6 shew cross sections respectively on lincs XX and Y Y Fig. 1.
The rod a connected at one end to the brake block gear, which may be of
any known kind, has its other end formed as a nut into which screws the screw
spindle b. This spindle has a part c of square or prismatic section which can
slide without turning in a tube d; it is connected by an are-shaped link
forked arme of the crank lever f g and being the pivot pins of the
connecting link. The crank lever is pivoted to a pin in the head of
the tube d and can be turned upon such pin in the direction of the arrow >
Fig. 1, so as to assume the dotted position. By such motion of the crank lever
the link y will be moved from the position shewn in full lines at Fig.
shewn in dotted lines, and consequently the spindle cb will be slid forward in a
longitudinal direction in the tube d. This tube is carried in a sleeve fixed to
the framing, in which sleeve the tube is free to turn, being prevented from
shifting longitudinally therein by a pin k screwed through the sleeve and entering
a groove in the tube d.
into that
By the above described longitudinal motion of the spindle the brake block
gear is actuated so as to remove the brake block or blocks away from the wheels,
this being the ordinary position of the apparatus when the brake is not applied.
For applying the brake, the crank lever is first turned on its pivot from
the dotted position into that shewn in full lines, whereby the link y and spindle b c
are drawn inwards, thus bringing the brake blocks against or in close proximity
to the wheels. The forcible application of the brake blocks is then effected by
rotating the crank lever whereby the tube d and the spindle care rotated in
the sleeve h, thus causing the nut of the brake rod a to be screwed up the spindle b,
BO as to draw the brake blocks tight against the wheels. For releasing the brake
again, the crank lever is first turned backwards so as to screw the rod a along
the spindle and thus relieve the pressure of the blocks, after which the crank
lever is turned over into the dotted position again so as to remove the blocks from
the wheels.
In order to prevent the crank lever from being accidentally turned over from
one position to the other, the pin which connects the link to the arm e of the
lever, is not in the line passing through the pins f¹ and y' when the crank lever
is in the position shewn in full, but is situated to one side of such line, in the
direction towards the lever. By this means it will be seen that the pull exerted
by the rod a when the brake is screwed up, being exerted at y² to one side of the
fulerum of the lever f, will hold this with a corresponding force against accidental
displacement.
There may also be provided a spring between the end of the tube d and_a
collar on the spindle bc, which, in tending to press the spindle in the
direction towards the brake rod;, will put an additional strain on the link g and
pin tending to hold the crank lever still more securely, as in endeavouring to
turn over the lever, the spring I will have to be farther compressed until the pin g²
has passed beyond the axial line of the spindle.

page_text: It will be obvious that the various details of the above described invention, such
as the form of the link g, crank f, head d¹ and mode of mounting the tube d in the
sleeve h can be variously modified without departing from the nature of my
invention.
Having now particularly described and ascertained the nature of this inven--
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. In quick-acting brake mechanism the combination of a pivoted crank lever
such as with a screw spindle be in such manuer that by turning the crank lever
over upon its pivot it actuates the said spindle and brake rod so as to bring the
brake blocks against or in close proximity to the wheels, and on then rotating the
crank lever the screw spindle is rotated so as to forcibly apply the brake blocks,
substantially as described.
2. In quick acting brake mechanism, the combination of a crank lever / pivoted
to a pin carried by a rotatable tube d containing the screw spindle bc and
having an arm e jointed to a link g which is also pivoted to the screw spindle b c of
the brake gear substantially as and for the purposes described.
Dated this 23rd day of April 1894.
ABEL & IMRAY,
Agents for the Applicant.