Improvements in Brake Mechanism, applicable to Bicycles, Tricycles, and the like.
Year: 1897

page_text: Date of Application, 10th Feb., 1897
Complete Specification Left, 10th Nov., 1897-Accepted, 8th Jan., 1898.
PROVISIONAL SPECIFICATION.
Improvements in Brake Mechanism, applicable to Bicycles, Tricycles,
and the like.
I THOMAS ALBERT BORHAM of 112 Hammersmith Road, London, W. Engineer,
do hereby declare the nature of this invention to be as follows:-
My invention consists in improvements in brake mechanism, applicable to
bicycles, tricycles, and the like, and is carried out as follows:-
.
The plunger rod passes through a guide in the centre of handle bar stem and
through part of steering post, being attached by means of a screwed shank to a
nut brazed into an inner tube upheld by a spring and having a feather working
in a guide secured to the bottom crown plate to prevent its turning round. This
tube passes through the crown of the fork and to it is attached the rubber or
other brake block. The upper end of the rod is secured by a pivoted curved link
to a brake lever.
By uncoupling this link and turning round the rod, adjustment can readily be
made to suit the height of the handle bar or the brake action.
1007
FRANCIS M. ROGERS,
Agent for Applicant.
Improvements in Brake Mechanism, applicable to Bicycles, Tricycles,
and the like.
I, THOMAS ALBERT BORHAM, of 112 Hammersmith Road London W. Engineer,
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 follow-
ing statement:-
My invention consists in improvements in brake mechanism, applicable to
bicycles, tricycles, and the like, and is carried out as follows:-
The plunger rod passes through a guide in the centre of handle bar stem and
through part of steering post, being attached by means of a screwed shank to a
nut brazed into an inner tube upheld by a spring and having a feather working
in a guide secured to the bottom crown plate to prevent its turning round. This
tube passes through the crown of the fork and to it is attached the rubber or
other brake block. The upper end of the rod is secured by a pivoted curved link
to a brake lever.
By uncoupling this link and turning round the rod, adjustment can readily be
made to suit the height of the handle bar or the brake action.

page_text: To enable the construction and operation of my invention to be clearly under-
stood reference is made to the accompanying drawing in which:-
Fig. 1, is a general perspective view.
Fig. 2, is a cross section of guide and feather to enlarged scale.
In the drawing 1, is the handle bar stem, and 1º, the handle bar. A hole 2,
is drilled centrally as shewn, and through this is passed a plunger rod 3, having
a screwed shank 3", the upper end of this rod is formed with an eye 4. Into this
is pivoted and secured by riveting over the end of the pivot a curved link 5, the
lower end being forked as at 6, and pivoted to the break lever 7, by a set screw 8.
The threaded end of the rod 3ª, engages with a nut 9, brazed into the inner
tube 9, the lower part having a feather 10, which engages with a guide 11,
formed in the bush 12, which is securely fastened by a set screw 17, or the like
to the crown piece 13, of the fork. The break block 14, which may be shod
with rubber or other suitable substance is attached to the end of the tube 9ª, by
screwing, brazing, or equivalent means. A spiral spring of steel brass or the
like 15, surrounds the tube 9ª, and presses against the pin 16, and guide block
or bush 12. The operation of my invention is as follows. It will be understood
that the spring 15, pressing upwards maintains the brake block in the position
shewn clear of the wheel, but upon pressing the lever the block is forced down
upon the tyre by means of the interacting parts shewn.
By uncoupling the curved link 5, and turning round the rod 3, adjustment can
readily be made to suit the height of the handle bar or the brake action..
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. In a bicycle tricycle or the like the combination with the handle bar stem,
and crown of fork, of a plunger rod threaded into an inner tube to the lower end
of which the brake block is secured, said inner tube being actuated by a curved
link pivoted to it and the brake lever as shewn and described.
2. For the purpose of operating the brake controlling bicycles, tricycles, and
the like vehicles, the combination with the lever 7, of the curved link 5, pivoted
thereto and to the plunger rod 3, adjustably threaded into the nut 9, brazed or
otherwise fastened to the inner tube 9, carrying the brake, the feather 10, on
said tube engaging with the guide 11, formed in bush 12, secured as shewn to
the crown of the fork. The respective parts cooperating for effecting the purpose
set forth.
Dated this 10th day of November 1897