Year: 1886

page_text: WILLIAM JOSEPH PARKYN and JAMES HENRY PARKYN, trading as W. Parkyn
and Sons, Van and Cart Builders and Contractors &c. 1 Cobourg Street, Euston
Square, London N.W. do hereby declare the nature of our said invention to be as
follows:-
The object of our invention is to increase the grip of the Block on the tire of the
wheel by a minimum amount of power and thereby more effectually check the velocity
of the wheel or wheels of the vehicles.
This we attain in our Improvement by fixing the axis or Fulcrum of the pan and
Block always parallel with the face of the tire of the wheel instead of as heretofore by
the lever arm, by which only one point of the Block is parallel and comes in contact
with the tire of the wheel and thereby only wearing away the outside edge of the face
of the Block.
The drawing herewith, having reference to the figures thereto will more fully
explain the nature of this our Invention, Fig. 1. section of wheel, Fig. 2. Pan and
Block Fig. 3. Axis or Fulcrum of Pan and Block. Fig. 4 Axis or Fulcrum of lever
of application, Fig. 5. Stay or rest to keep Fig. 2 (Pan & Block) in vertical
line when not in action, Fig. 6 Lever of Application to Fig. 4, Fig. 7. Tire of
wheel.
The above is fixed to the bottom frame of vehicle by means of suspenders.
It will be seen by this our said Invention that the block is at all times parallel with
the face of the tire of wheel, no matter how worn or thin the Block may be, and
that from first to last the power and check of the velocity of the wheel is equal.
WILLIAM J. PARKYN.
JAMES H. PARKYN.
Trading as W. Parkyn & Sons,
1, Cobourg Street, N.W.

page_text: We WILLIAM JOSEPH PARKYN. and JAMES HENRY PARKYN trading as W. Parkyn
and Sons Van and Cart Builders, Contractors etc. of 1 Cobourg Street Euston
Square in the Parish of St. Pancras in the County of Middlesex 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 our invention is to increase the grip of the brake block on the tyre of
the wheel with a minimum expenditure of power and thereby more effectually retard
the velocity of the wheel, or wheels, of the vehicle. We attain this end by mounting
the brake lever and pan on a horizontal axis, parallel with the axis of the wheel against
which the block bears, so that the block is always parallel and square with the face of
the tyre of the wheel.
In order that our invention may be fully understood we will more particularly
describe it making reference to the accompanying drawing in which similar parts are
marked with like letters of reference.
In the accompanying drawing Fig. 1 is a side elevation of our improved brake gear,
and Fig. 2 is a plan thereof.
Referring to these figures it will be seen that on a suitable suspender or hanger A
fixed to the under frame of the vehicle, and stayed by the rod A³, we pivot by a pin a
a lever B carrying the brake pan C and block C¹ at one end, and having any suitable
connection for the application of power at the other end. The brake pan C is pivotted
to the end of the lever B by a pin 6 so that the brake block C is free to accomodate
itself to the tyre of the wheel X. To keep the face of the brake block C parallel with
the face of the tyre of the wheel when the brake is "off," a rest, spring or equivalent
device, is used to support the block. In the accompanying drawing a spring D of
india-rubber or coiled wire is shown, connected at one end to the under frame of the
vehicle, and at the other end to the brake pan C by means of a small hook c fixed
thereto.
It will be understood that a brake gear as hereinbefore described may be applied
either to one or both of the rear wheels of a vehicle.
We do not limit ourselves to any particular method of applying the brake, or brakes,
as the method of application depends to a great extent on the particular type of vehicle
to which it is fitted; we sometimes use an ordinary foot lever, sometimes a hand lever,
and in some cases a travelling nut and screw operated by a hand wheel. In either
case the free end of the lever B is connected to the operating mechanism by a chain or
other convenient form of coupling.

page_text: 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. A brake for vehicles, constructed arranged and operating, specifically as and for
the purpose herein before set forth.
2. In a brake for vehicles, mounting the brake block and lever of application on a
horizontal axis as, and for, the purpose herein before described and shown.
3. In a brake for vehicles, the combination of the horizontal pivotted lever B, the
horizontal pivotted brake pan and block Cand C, and the rest or spring D, all arranged
and operating as and for the purpose described and shown.
ROBT. ED. PHILLIPS, M.I.M.E.,
Consulting Engineer & Patent Agent,
Royal Courts Chambers,
70, 71, & 72, Chancery Lane, London, W.C.,
Agent for the Applicants.