Improvements in Cycle Back Fork Ends for use in conjunction with Chain Adjustments
Year: 1897

page_text: Date of Application, 21st May., 1897
Complete Specification Left, 30th Sept., 1897-Accepted, 18th Dec., 1897
PROVISIONAL SPECIFICATION.
66 Improvements in Cycle Back Fork Ends for use in conjunction with
Chain Adjustments."
I, FREDERICK WILLIAM BRIGGS of 15 Golden Hillock Road, Small Heath, near
the City of Birmingham, Cycle Manufacturer, do hereby declare the nature of this
invention to be as follows:-
This invention relates to the ends of the back fork or chain stay members of the
framings of cycles for use in conjunction with the chain adjustments, and has for
its object, to provide a simple and efficient means of adjusting the chain.
The
Each of the end parts of the chain stays, which are preferably of a D-section,
have the open end closed by a like shaped cap, shouldered plate or equivalent,
with the straight or inner edge provided with an eyed lug wherethrough the
screwed stem of an eyed draw bolt passes and is adjusted forwards by a screw nut
on the end of the said screw bearing against the outer face of the said cap.
eye of the draw bolt comes coincident with a part of a long slot formed longi-
tudinally along the middle of the straight side or face of the D-sectioned stay
member, which said side may be slightly raised from the plane of the tube and is
preferably straight from end to end so as to present a straight surface for the
draw bolt to work upon. The axle of the back wheel passes through the eye of
the draw-bolt and laterally through the slot in the boxed-in end of the stay and
receives a nut taking upon the end of the spindle, within the interior of the stay,
and is screwed up against the inside surface of the slotted straight wall of the fork
end for affixing the spindle in its adjusted position.
Access to the nut is gained through a long slot formed or cut along the bottom
of the chain stay end, preferably adjacent to the bottom edge of the straight side
thereof.
COMPLETE DIECIFICATION.
Improvements in Cycle Back Fork Ends for use in conjunction with
Chain Adjustments.”
I, FREDERICK WILLIAM BRIGGS of 15 Golden. Hillock Road, Small Heath, near
the City of Birmingham, Cycle Manufacturer, 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 the ends of the back form or chain stay members of
DQ77

page_text: the framings of cycles for use in conjunction with the chain adjustments, and has
for its object, to provide a simple and efficient means of adjusting the chain.
Figure 1 of the accompanying drawing represents a safety bicycle fitted with
back fork ends and cycle chain adjustment according to my invention.
Figure 2 represents upon an enlarged scale, an elevation of the inner side of my
improved fork end with chain-adjustment fittings.
Figure 3 is a longitudinal vertical section of the same.
Figure 4 represents an end view of the said fork and chain adjustment fittings,
with the hub of the wheel in position, one of the said fork members being in
section to show the boxing-in of the axle end and its locking nut.
Figure 5 is an underside plan of figure 4, but with the left-hand fork side in
horizontal section.
Figure 6 is an outside elevation of the fork end separately.
The same letters of reference indicate corresponding parts in figures 1 to 6.
Each of the end parts a', of the chain stays a, which are preferably of a D-section,
has the open end a², closed by a like shaped cap a³, shouldered plate or equivalent,
with the straight or inner edge as, provided with an eyed lug a³, wherethrough
the screwed stem 61, of an eyed draw-bolt b, passes and is adjusted by a screw
nut c, on the end of the said screw bearing against the outer face of the said
cap. The eye 62, of the draw bolt comes coincident with a part of a long slot aº,
formed longitudinally along the middle of the straight inner side or face a7, of the
D-sectioned stay member, which said side may be slightly raised from the plane
of the tube and is preferably straight from end to end so as to present a straight
surface for the draw bolt to work upon. The screwed end d', of the axle d, of the
back wheel e, passes through the preferably screwed eye 62, of the draw-bolt and
laterally through the slot into the hollow interior a8, of the boxed-in end of the
stay and there receives a locking nut f, taking, when screwed up, a bearing
against the inside surface a³, of the slotted straight wall of the fork end thereby
affixing the spindle in its adjusted position.
Access to the nut is gained through a long slot a¹o, formed or cut along the
bottom of the chain stay end, preferably adjacent to the bottom edge of the straight
side thereof.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
:
First In back-fork ends for use in conjunction with cycle chain adjustments,
locating the lock nuts for the spindle within the hollow interior of the boxed-in
ends of the chain stays, which have suitable longitudinal slots within them, where-
through access to the said nuts is gained, substantially as described and set forth.
Secondly: A cycle chain adjustment, in which the screwed ends of the wheel
spindle pass respectively through a preferably screwed eye of the draw-bolt and
laterally through a slot into the hollow interior of the boxed-in end of the chain
stay and there receives a locking nut, taking, when screwed up, a bearing against
the inside surface of the slotted straight wall of the fork end, substantially as
described and set forth.
Thirdly: The improvements in back-fork ends for cycles, and in the construc-
tion, arrangement and combination of the parts of cycle chain adjustment used
in conjunction therewith, substantially as described and set forth.
Dated this 20th day of Santambo
1007
FREDERICK WILLIAM BRIGGS
By Henry Skerrett
24 Temple Row Birmingham Agent for Applicant.