Improvements in Brakes or Retarding Devices, applicable for Cycles and other Purposes.
Year: 1897

page_text: Date of Application, 9th Feb., 1897
Complete Specification Left, 9th Nov., 1897-Accepted, 15th Jan., 1898
Improvements in Brakes or Retarding Devices, applicable for Cycles
and other Purposes.
I, HENRY GRENDON TIPPET, of 292, Vauxhall Road, Liverpool, in the County
of Lancaster, Merchant, do hereby declare the nature of this invention to be as
follows:
-
It is
This invention relates to brakes or retarding devices applicable for cycles, motor
cars, machinery and other purposes, of that class in which a friction band or strap
is applied to the nave or other suitable part of a wheel, pulley, etcetera.
designed to make such devices more useful and convenient, while possessing
certain advantages over such other mechanism now in use.
One way of carrying my invention into effect as applied to bicycles is as
follows:
I employ a friction band or strap surrounding a part of the nave of the wheel
or surrounding a friction disc or surface, forming part of, or secured to the wheel
so as to rotate therewith. The band or strap is flexible or elastic, and is made
capable of being applied to the friction surface by means of a pair of levers
articulated by a pivot, which pivot is fixed by means of a sleeve or otherwise to the
framework of the machine. At one end these articulated levers are pivoted to
the opposite and adjacent ends of the brake band and at the other coupled to the
brake rod by means of links. The impulse imparted to the rod by the brake
handle is adapted to separate the ends of the levers to which the rod is coupled
by the links, causing the opposite ends to approach each other and operate with
great power to close the brake band round the disc. The converse takes place
when the brake handle is liberated. The strap or band may be faced inside with
wood, leather or other suitable material, or it may be used without any such
facing, and the coupling of the ends of the levers to the opposite ends of the band
may be effected in an adjustable manner, so that wear of the brake band by
frictional contact with the disc may be compensated for. It must be understood
that I do not confine myself to this exact arrangement of levers, as toggle levers,
or levers articulated like a pair of shears or scissors or lazy tong levers moved by
the impulse communicated to the first pair, or other equivalent arrangements,
might be used for closing the brake band on to the frictional surface.
Instead of using the aforesaid double levers, a single lever may be employed
for closing the frictional band or strap onto the disc. In such case, one end of the
band or strap is made a fixture, and the other is pivoted or secured to a single lever
whose opposite end works (by means of a pin or otherwise) in an eccentric slot
firmly secured as a fixture to the framework of the machine. The end of the
brake rod which is worked by the brake handle, is jointed to this single lever at
a suitable distance from the point where it is pivoted to the end of the brake band.
The result is that when the brake rod is depressed to depress the lever, the latter
being controlled and influenced by the eccentric slot, closes the band around the

page_text: friction surface on the nave, and so provides the necessary braking effect to
retard the movement.
I have described my invention more especially in regard to bicycles, but it will
be understood that it can be equally well applied to tricycles, motor carriages and
machinery of all kinds. The manner of applying my invention to these other
purposes will be obvious without further description.
Dated this 8th day of Th1007
WM. P. THOMPSON & Co.,
Of 6 Lord Street, Liverpool, Patent Agents for the Applicant.
Improvements in Brakes or Retarding Devices, applicable for Cycles
and other Purposes.
I, HENRY GRENDON TIPPET, of 292, Vauxhall Road, Liverpool, in the County
of Lancaster, Merchant, 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 relates to brakes or retarding devices applicable for cycles, motor
cars and machinery and other purposes, of that class in which a friction band or
strap is applied to the nave or other suitable part of a wheel, pulley or the like.
It is designed to make such devices more useful and convenient, while possessing
certain advantages over such mechanism now in use.
The invention is best described by aid of the accompanying drawings, in
which:-
Figure 1 is a front view of my apparatus;
Figure 2 a side view;
Figure 3 a detail of shaft and pulley;
Figure a detail of strap;
Figure 5 a slight variation showing the strap and the lower part of the
mechanism for working the same.
In these A is a friction band or strap surrounding a part of the nave of the wheel
or a friction disc or surface B forming part of or secured to the wheel or its hub
so as to rotate therewith. The band or strap A is flexible or elastic and is made
capable of being applied to the friction surface by means of a pair of levers C and
B articulated on a pivot E, which pivot is fixed by means of a sleeve F or other-
wise to the framework G of the machine. At one end these articulated levers
are pivotted to the opposite and adjacent sides of the brake band A by means of
pivots H H and at the other ends they are coupled to the brake rod I by means
of links J. The impulse imparted to the rod by the brake handle is so arranged
as to separate the ends of the levers C and D to which the rod is coupled by the
links J, causing the opposite ends to approach each other and operate with great.
force to close the brake band A round the disc B. The converse takes place when
the brake handle is liberated. The strap or band may be faced inside with wood,
leather or other suitable material, or it may be used without any such facing, and
the coupling of the ends of the levers to the opposite ends of the band may be
effected in an adjustable manner, such as by means of a screw K and check nuts L
so that the wear of the brake band by frictional contact with the disc may be
compensated for. It must be understood that I do not confine myself to this
exact arrangement of levers, as toggle levers or levers articulated like a pair of
shears or scissors or lazy tongs levers moved by the impulse communicated to the
first pair, or other equivalent arrangements, might be used for closing the brake
4

page_text: band on the frictional surface, or instead of using the aforesaid double levers, a
single lever M, Figure 5, may be employed for closing the friction band or strap
on to the disc. In such case one end of the band or strap is made a fixture, being
attached to the piece N fixed to the framework in any convenient manner, the
other end is pivotted or secured to the single lever M, whose opposite end works
by means of a pin or otherwise in an eccentric slot Q firmly secured as a fixture
to the framework of the machine and preferably formed in one with the part N.
The end of the brake rod is worked by the brake handle and is jointed to this
single lever at a suitable distance from the point where it is pivotted to the end of
the brake band. The result is that when the brake rod is depressed to depress the
lever, the latter being controlled and influenced by the eccentric slot, closes the
band around the friction surface on the nave, and so provides the necessary
braking effect to retard the movement.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I wish it to be understood
that I am well aware that brake bands have been placed before on discs of
machinery for the purpose of acting as a brake, and I make no claim for this
broadly, but I declare that what I claim is:
1. The combination with a bicycle, motor car or the like of a drum or disc
attached to the wheel, a brake band surrounding the same and two levers pivotted
together and actuated by means of a brake handle, substantially as described.
2. Also the modification, whereby one end of the brake band is fixed to the
framework and the other is adjusted in position by the pull or push of the brake
handle in the manner specified and set forth in relation to Figure 5.
3. The special form of apparatus for putting on and taking off the brake,
substantially as described, with reference to Figure 1.
Dated this 8th day of November 1897.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicant.