An Automatic Safety Break Applicable to Perambulators and other Wheeled Vehicles.
Year: 1888

page_text: This Specification was, upon the 23rd day of April 1890, Amended under
Sections 18 to 21 of the Patents, Designs, and Trade Marks Act, 1883.
Date of Application, 30th Apr., 1888
Complete Specification Left, 29th Nov., 1888-Accepted, 12th Feb.. 1889
PROVISIONAL SPECIFICATION.
An Automatic Safety Break Applicable to Perambulators and other
Wheeled Vehicles.
WILLIAM HIGFORD GRAHAM GEORGE RODNEY MCDONALD Manufacturers 26 Lambs
Conduit Street W.C. do hereby declare the nature of this invention to be as
follows:-
This break is formed in the following manner-From the inner side of the box
of each hind wheel is a flange having a projection-on which the break acts.
The break consists of two hollow boxes having fixed centres at either side of
which is a grooved and moveablo piece. Across the upper portion of the box is a
crossbar allowing the two grooved pieces to slide freely upwards or downwards
between these the projections on the flanges are caught the wheels cannot then revolve.
The boxes are attached to a moveable bar which is connected with two pieces of
iron or other suitable material in shape of a V joined at the narrow end by a rivet,
wire, or other suitable means. The longer and upper portion of the V shape joining
or forming the handle of the Perambulator or other Vehicle. When the handle is
pressed in wheeling-the longer end of the V shape presses the smaller end against
the moveable bar and the boxes containing the two grooved moveable pieces are
then raised above the projections on the flanges of the wheels allowing the wheels
to revolve freely The moment the downward pressure is removed-by letting go
the handle the boxes fall pressing the two grooved moveable pieces on the pro-
jections on the flanges and one of the moveable pieces therein is raised by the.
revolution of the wheel till both fall on the projections on the flanges then the wheels
can no longer revolve.
Dated this Twentieth day of April 1888.
E

page_text: An Automatic Safety-Break Wheel Locking Device Applicable to Per-
ambulators and other similar Wheeled Vehicles.
We WILLIAM HIGFORD GRAHAM, and GEORGE RODNEY MCDONALD, both of
26 Lambs Conduit Street in the county of Middlesex, Manufacturers, 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 :-
:-
This invention has for its object to provide a brake locking device which shall
automatically lock the wheels of perambulators and other similar wheeled vehicles
when the pressure of the hands is removed from the driving handle, the said brake
device being conversely released from the wheels when the driving handle is depressed
as is the case when the vehicle is being propelled under ordinary circumstances, and
consists essentially in the employment of clutch boxes specially constructed to engage.
with lobes or teeth on the bind wheel centres, the said clutch boxes and teeth being
connected and disconnected by suitable mechanism accordingly as the driving handle
of the vehicle occupies an elevated or depressed position.
In the accompanying two sheets of illustrative drawings
Fig. 1 represents a side elevation of the wheels and underframe of a perambulator;
with an automatic brake wheel locking device constructed according to this invention
and,
Fig. 2 is half plan of the same.
Fig. 3 represents in detail to an enlarged scale, a section through A B Fig. 4 and
shewing in side elevation a clutch box with disconnecting gear.
Fig. 4 is a plan and Fig. 5 is a cross section of the same.
The centres or hubs a of the hind or trailing wheels bare. prolonged inwards,
and on the extremity of each said prolongation are formed lobes or teeth
preferably four in number and free to rotate inside a hollow clutch box d capable
of being elevated or depressed relatively to the axle e and wheel centre a; and in
the upper part of which are arranged two pawls or bolts f free to slide in a vertical
direction to a certain extent, limited by the cross bar .g working in the recesses h,
so that, when the clutch box is lowered the said bolts engage with one of the teeth c
on the wheel centre a and lock the wheel, the vertical play or freedom of the pawls
allowing a tooth in its rotation to displace the pawl immediately before it and strike.
or abutt against the second pawl, the first one then falling into its normal position
and behind the tooth, which is thus effectually locked as will be clearly seen. When
however the clutch box is raised the pawls are elevated with it and so disengaged
from the tooth.
The clutch box casings are constructed in halves di secured together by the
nuts k, and the clutch boxes are held securely together by means of two distance
rods. Im fastened to their tops and bottoms as clearly shewn. The bottom distance
rod m works in. notches in the ends n of two levers no fulcrumed at their central
part p on a bracket q secured to the axle e, their other ends o being oined by a cross

page_text: rod r which is drawn in an upward direction by means of springs s connected to
the main frame t of the vehicle. Resting on this cross bar are the two rods u from
the driving handle u, which rods, are carried down the back and underneath the
vehicle to its front part and hinged to the frame at w, thus forming a long bent double
lever.
The dotted and full lines on Fig. 3 shew the relative positions of the various
parts when the driving handle is in its depressed and elevated positions respectively.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what we
claim is :-
1. The employment of an Automatic brake for locking the wheels of perambulators
and other similar wheeled vehicles.
2. In perambulators and other similar wheeled vehicles the arrangement of
mechanism whereby the brake mechanism is in action until the driving handle is
depressed, the brake being again forced into nction as soon as the handle is released
substantially as described.
3. 1. In perambulators and other similar wheeled vehicles the construction of a
brake clutch arranged to be actuated as described in claim 2, and wheel locking device
comprising a clutch box in which are two sliding bolts or pawls for engaging with lobes or
teeth forming part of or connected to the wheel centre, and operated from the driving
handle in such manner that when the said handle is depressed the clutch box is elevated
and the sliding pawls disengaged from the lobe wheel thus leaving the vehicle wheels free
to rotate but when the hands are removed from the driving handle the sliding pawls
engage with a lobe of the said lobe wheel and thereby effectually locking the said vehicle
wheel substantially as described.
4.2. The arrangement and construction of an automatic safety brake wheel locking
device applicable to perambulators and other similar wheeled vehicles substantially as
described with reference to the drawings.
Dated this 28th day of November 1888.
G. R. MODONALD.
W. H. GRAHAM.

page_text: Date of Application, 30th Apr., 1888
Complete Specification Left, 29th Nov., 1888
Complete Specification Accepted, 12th Feb., 1889
PROVISIONAL SPECIFICATION.
An Automatic Safety Break Applicable to Perambulators and other
Wheeled Vehicles.
WILLIAM HIGFORD GRAHAM GEORGE RODNEY MCDONALD Manufacturers 26 Lambs
Conduit Street W.C. do hereby declare the nature of this invention to be as
follows:-
This break is formed in the following manner-From the inner side of the box
of each hind wheel is a flange having a projection-on which the break acts.
The break consists of two hollow boxes having fixed centres at either side of
which is a grooved and moveable piece. Across the upper portion of the box is a
crossbar allowing the two grooved pieces to slide freely upwards or downwards
between these the projections on the flanges are caught the wheels cannot then revolve.
The boxes are attached to a moveable bar which is connected with two pieces of
iron or other suitable material in shape of a V joined at the narrow end by a rivet,
wire, or other suitable means. The longer and upper portion of the V shape joining
or forming the handle of the Perambulator or other Vehicle. When the handle is
pressed in wheeling-the longer end of the V shape presses the smaller end against
the moveable bar and the boxes containing the two grooved moveable pieces are
then raised above the projections on the flanges, of the wheels allowing the wheels
to revolve freely. The moment the downward pressure is removed-by letting go
the handle-the boxes fall pressing the two grooved moveable pieces on the pro-
jections on the flanges and one of the moveable pieces therein is raised by the
revolution of the wheel till both fall on the projections on the flanges then the wheels
can no longer revolve.
WILLIAM HIGFORD GRAHAM.
GEORGE RODNEY MCDONALD.

page_text: Wheeled Vehicles.
We WILLIAM HIGFORD GRAHAM, and GEORGE RODNEY MCDONALD, both of
26 Lambs Conduit Street in the county of Middlesex, Manufacturers, 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-
This invention has for its object to provide a brake which shall automatically lock
the wheels of perambulators and other similar wheeled vehicles when the pressure
of the hands is removed from the driving handle, the said. brake being conversely
released from the wheels when the driving handle is depressed as is the case when
the vehicle is being propelled under ordinary circumstances, and consists essentially
in the employment of clutch boxes specially constructed to engage with lobes or
teeth on the hind wheel centres, the said clutch boxes and teeth being connected and
disconnected by suitable mechanism accordingly as the driving handle of the vehicle.
occupies an elevated or depressed position.
In the accompanying two sheets of illustrative drawings
Fig. 1 represents a side elevation. of the wheels and underframe of a perambulator
with an automatic brake constructed according to this invention and,
Fig. 2 is half plan of the same.
Fig. 3 represents in detail to an enlarged scale, a section through AB Fig. 4 and
shewing in side elevation a clutch box with disconnecting gear.
Fig. 4 is a plan and Fig. 5 is a cross section of the same.
The centres or hubs a of the hind or trailing wheels are prolonged inwards,
and on the extremity of each said prolongation are formed lobes or teeth_c,
preferably four in number and free to rotate inside a hollow clutch box d capable
of being elevated or depressed relatively to the axle e and wheel centre a; and in
the upper part of which are arranged two pawls or bolts f free to slide in a vertical
direction to a certain extent, limited by the cross bar g working in the recesses h,
so that, when the clutch box is lowered the said bolts engage with one of the teeth c
on the wheel centre a and lock the wheel, the vertical play or freedom of the pawls
allowing a tooth in its rotation to displace the pawl immediately before it and strike
or abutt against the second pawl, the first one then falling into its normal position
and behind the tooth, which is thus effectually locked as will be clearly seen. When
however the clutch box is raised the pawls are elevated with it and so disengaged
froin the tooth.
The clutch box casings are constructed in halves di secured together by the
nuts, and the clutch boxes are held securely together by means of two distance
rods in fastened to their tops and bottoms as clearly shewn. The bottom distance
rod m works in notches in the ends n of two levers no fulcrumed at their central
part p on a bracket q secured to the axle e, their other ends o being joined by a cross

page_text: rod which is drawn in an upward direction by means of springs s connected to
the main frame t of the vehicle. Resting on this cross bar rare the two rods u from
the driving handle which rods, are carried down the back and underneath the
vehicle to its front part and hinged to the frame at w, thus forming a long bent double
lever.
The dotted and full lines on Fig. 3 shew the relative positions of the various
parts when the driving handle is in its depressed and elevated positions respectively.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what we
claim is :-
1. The employment of an Automatic brake for locking the wheels of perambulators
and other similar wheeled vehicles.
2. In perambulators and other similar wheeled vehicles the arrangement of
mechanism whereby the brake mechanism is in action until the driving bandle is
depressed, the brake being again forced into action as soon as the handle is released
substantially as described.
.
3. In perambulators and other similar wheeled vehicles the construction of a brake
clutch arranged to be actuated as described in claim 2, and comprising two sliding
bolts or pawls engaging with lobes or teeth forming part of or connected to the
wheel centre, and thereby locking the said wheel substantially as described.
4. The arrangement and construction of an automatic safety brake applicable to
perambulators and other similar wheeled vehicles substantially as described with
reference to the drawings.