Year: 1895

page_text: Date of Application, 28th Oct., 1895
Complete Specification Left, 15th Jan., 1896-Accepted, 22nd Feb., 1896
I, JAMES MC BURNEY, of Toronto, Canada, but temporarily residing at the
Queen's Hotel, Birmingham, in the County of Warwickshire, England, Manu-
facturer of Cycles, do hereby declare the nature of this invention (which has been
communicated to me from abroad by Robert S. Anderson of Toronto, Canada,
Machinist) to be as follows:-
This invention relates to an improved construction of brake for velocipedes,
which is put into operation by "back-pedalling" i.e. by exerting pressure on the
cranks on their up stroke.
The driving chain wheel, instead of being rigidly fixed to one of the cranks or to
the pedal-crank axle, is mounted loosely on the boss of the adjacent crank so that
it is free to rotate thereon. The crank which is fixed to the axle in the usual
manner has two radial arms which, and together with the crank, each carry a
transverse pin or stud. These pins or studs engage with slots in the chain wheel
so that the crank bas a small pre-determined free radial movement with respect
to the chain wheel. On to the pedal-crank axle bracket adjacent to the chain
wheel is fixed a small drum faced with leather to act as a brake drum. Encircling
this drum for about three parts of its circumference is a curved band of flat spring
steel. One end of this band is fixed to the chain wheel and the other end is fixed
to the crank either directly or indirectly, so that its elasticity acts to keep the pins
carried by the crank and its arms up against the forward ends of the slots in the
chain wheel, so that power applied to the cranks to drive the machine forward is at
once communicated to the chain wheel. When, however, "back-pedalling
" is
resorted to, the cranks move radially with respect to the chain wheel until the flat
spring band comes into contact with the brake drum fixed to the pedal-crank axle
bracket, and thus operates to retard the rotation of the driving chain wheel and
through it the forward movement of the machine.
Dated this 28th day of October 1805
I, JAMES MCBURNEY, of Toronto, Canada, but temporarily residing at the
Queen's Hotel, Birmingham, in the County of Warwickshire, England, Manu-
facturer of Cycles, do hereby declare the nature of this invention (which has been
communicated to me from abroad by Robert S. Anderson of Toronto Canada,
Machinist) 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 construction of brake for velocipedes,
which is put into operation by "back-pedalling," i.e. by exerting pressure on the
cranks on their up stroke.

page_text: In the accompanying drawing which illustrates this invention :-
Figure 1 is a view in front elevation thereof
Figure 2 is a view in back elevation thereof, and
Figure 3 is a section on line x, x, Figure 1.
Throughout the views similar parts are marked with like letters of reference.
The driving chain wheel A instead of being rigidly fixed to the axle or to one
of the cranks is mounted loosely on an extension of the boss of the adjacent
crank B so that it is free to rotate thereon. The crank B which is fixed to the
axle C either by a transverse cottar or by being keyed on in the usual manner has
two radial arms B₁ which together with the crank, each carry a pin or stud D
which engage with slots a in the chain wheel so that the crank has a small
predetermined free radial movement with respect to the said wheel. On to the
pedal-crank axle bracket X or to the frame adjacent to the chain wheel A is fixed
a small drum E which is preferably though not of necessity faced with leather.
Encircling this brake drum for about three parts of its circumference is a curved
band F of flat spring steel, one end f of which is fixed to the chain wheel A by
a stud a¹ and nut, and the other end f¹ is fixed to the crank B by being mounted on
a projection b on the crank into which the pin or stud D carried by it is screwed,
so that its elasticity acts to keep the pins or studs D up against the forward ends
of the slots a in the chain wheel, so that power applied to the cranks to drive the
machine forward is at once communicated to the chain wheel. When, however,
"back-pedalling" is resorted to, the cranks move radially with respect to the chain
wheel until the band F comes into contact with the brake drum E and thus
operates to retard the rotation of the driving chain wheel and through it the
forward movement of the machine.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
(1.) The combination of parts herein before described and illustrated by the
accompanying drawing forming an improved brake for velocipedes.
(2.) A brake for velocipedes consisting essentially of a drum E mounted on the
pedal-crank axle bracket or frame adjacent thereto, of a band F partly encircling
the said drum one end of the said band being fixed to the driving crank B and the
other end to the chain wheel A which is loosely mounted on the boss of the crank B
or on the axle adjacent thereto, motion being imparted from the crank B which
is fixed to the axle of the chain wheel A which is loose by means of pins or studs D
carried by the crank engaging with slots a in the chain wheel, as set forth.
Date this 13th day of January 1896.
1 this 13th day of January 1896.
ROBERT E. PHILLIPS, Assoc. M. Inst. C.E., M.I. Mech. E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.