Improvements in the Fork-ends of Cycles.
Year: 1897

page_text: Improvements in the Fork-ends of Cycles.
I, ROBERT FREDERICK HALL, Managing Director of R. F. Hall, Limited, of
Sherlock Street, in the City of Birmingham, do hereby declare the nature of this
invention to be as follows:-
This invention relates to the back-fork-ends or jaws of cycles.
The
According to my improvements, the said back-jaws or fork-ends, wherein the ends
of the back wheel axle or spindle is mounted, is made in two longitudinal halves
or opposed parts, one being fixed to the outer end of the chain stay by brazing or
otherwise and the other half being similarly secured to the adjacent lower end of
the seat stay. These two halves are recessed or chambered out on their inner opposed
faces or sides so as to form an internal chamber adapted to accommodate the chain
adjusting draw bolt which is partly enclosed or secreted between them.
spindle of the hub axle is then passed through coincident holes in the two opposed
halves and also through a like piercing in the plate or block end of the chain
adjusting bolt (which is located between them) and is there secured by nuts
screwing on the outer ends of the said spindles and bearing upon the outside sur-
faces of the outer cheeks of the sectional fork end, thereby locking all the parts
together. The chain bolt is adjusted by being drawn up by a nut in the usual way.
Dated this 17th day of September 1897.
ROBERT FREDERICK HALL,
By Henry Skerrett,
Agent for Applicant.
improvements in the Fork-ends of Cycles.
I, ROBERT FREDERICK HALL, Managing Director of R. F. Hall, Limited, of
Sherlock Street, in the City of Birmingham, 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 back fork ends or jaws of cycles.
According to my improvements, the said back jaws or fork-ends, wherein the ends
of the back wheel axle or spindle is mounted, is made in two longitudinal halves
or opposed parts, one being fixed to the outer end of the chain stay by brazing or
otherwise and the other half being similarly secured to the adjacent lower end of
the seat stay. These two halves are recessed or chambered out on their inner opposed
faces or sides so as to form an internal chamber adapted to accommodate the chain
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page_text: adjusting draw bolt which is partly enclosed or secreted between them. The
spindle of the hub axle is then passed through coincident holes in the two opposed
halves and also through a like piercing in the plate or block end of the chain
adjusting bolt (which is located between them) and is there secured by nuts
screwing on the outer ends of the said spindles and bearing upon the outside sur-
faces of the outer cheeks of the sectional fork end, thereby locking all the parts
together. The chain bolt is adjusted by being drawn up by a nut in the usual way.
Figure 1 of the accompanying drawing represents in side elevation, the left-hand
side fork end of a safety bicycle constructed according to my invention.
Figure 2 is a complete longitudinal vertical section of the same.
Figure 3 is a transverse vertical section of Figure 2, upon the dotted line, and
Figure 4 is a transverse longitudinal section thereof upon the dotted line r¹.
Figure 5 is a similar section to Figure 3, of the said fork end, but with the chain
adjusting fittings removed and the longitudinal halves separated to a short distance.
Figure 6 represents, in plan, the component halves of the fork end, and the chain
adjusting draw bolt (the head of which is in section) bearing end cap or plate and
adjusting nut separated.
Figure 7 is a plan of the improved fork end, with the chain adjusting fittings
in position.
Figure 8 is an elevation of the inner side of that element or sectional part of the
fork end which is secured to and carried by the chain stay member of a cycle, showing
how the inner face is recessed out to form one half of the chamber which receives
the head of the chain adjusting draw bolt.
Figure 9 represents a like view of the inner and recessed out side of the other
half of the said end, which is brazed or secured to the lower end of the framing back
stay.
The same letters of reference indicate corresponding parts in the several figures
of the drawing.
a is a fork-end or back jaw fitting, two of which are employed in connection with
a bicycle, one on either end of the rear wheel axle, which is supported thereby.
Each fork end consists of two longitudinal halves or sections b and c, the former
being provided with a lug b¹, adapted to receive, and be connected by brazing or
otherwise to the lower end of, one of the back stays d, of the framing of the machine,
whilst the other half or section c, has a similar lug c', by which it is connected with
the rearward end of one of the chain stays e. The inner face of the back stay
half b, which, in the form shown, comes innermost, is recessed at 6, throughout ita
whole length, whilst a longitudinal closed-ended slot 63, is formed through its walls
and through which the axle f, of the hub g, of the back wheel, passes. The inwardly
presented face of the chain stay and outermost section c, is coincidently chambered
or recessed at c², and slotted at 3, the rear end c, of the said slot being open to admit
of the wheel axle being passed longitudinally therein, the arrangement being such
that when the two said sections b and c, are placed together, with their opposed faces
in contact, the coincident recesses b, c, form an internal box like chamber h, within
whigh is located the head end ¹, of the chain adjusting draw bolt i, the said head
having a transverse hole *, coinciding with the slots 63, 3, and through which the
axle passes, whilst the screwed tail end 23, receives a sleeved nut j, the shoulder j³,
of which comes upon the outer side of a bearing cap or plate k, having flanges ki
at the top and bottom adapted to take over shoulders 65, 3, on the rearmost ends of
the fork end sections, so that by the rotation of the said nut (the sleeve of which
passes through the central hole in the bearing cap) the draw bolt is traversed,
drawing the wheel axle along with it and so adjusting the tension of the driving
chain.
m is a locking nut, taking and screwing upon the extending end f¹ of the axle,
and by the screwing up of which the back jaw sections are forced together and
clamped up against the shoulder f, or other equivalent abutment on the wheel axle,
thereby rigidly securing the whole of the elements together, making the connection
of the back stay to the chain stay, and at the same time, clamping the back wheel

page_text: axle to the back jaw or fork end in its adjusted position. On the other hand, when
the nuts m, on each end of the axle are unscrewed, and the upper end connections of
the back stay unfastened, the said back stay and the sections of the fork ends carried
by them may be withdrawn rearwardly from the machine carrying the axle and
wheel away with them.
Instead of employing a nut for locking together the longitudinal halves of the
back jaw, I may employ any suitable equivalent, such as a taper cotter pin, clip,
screw cap or the like.
As an alternative arrangement, the chain stay sections may be disposed inwardly,
with the sections connected with the back stays coming upon the outside, so that in
this case, when the clamping or lock are unscrewed off the axles, the back staya
and their fork end sections may be lifted away laterally from the machine, leaving
the wheel spindle and wheel still carried in the chain stay sections and the chain
adjusting fittings undisturbed.
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:-
.
First: A cycle fork end or back jaw fitting, comprising two longitudinal halves
or sections, connected or carried respectively to or by the adjacent ends of a chain
stay and back stay of a bicycle framing, and clamped together by a nut or equivalent
fastening, or by the nut which locks the spindle of a wheel to the said fitting, or
between a nut and a shoulder or collar ou the said wheel spindle.
Secondly: A cycle fork end or back jaw fitting,, comprising two longitudinal
halves or sections, each provided with a lug, socket or equivalent junction by which
they are respectively connected to the ends of a cycle framing chain stay and back
stay, whilst their inner and opposed faces are coincidently recessed to form a
chamber or box wherein the chain adjusting draw bolt is located and their outer
walls are slotted to admit of the said sections being passed onto the spindle of a
wheel to which they are secured and at the same time clamped together by being
forced against a shoulder or equivalent abutment on the said spindle by the screwing
up of a nut, substantially as described and set forth.
Thirdly: The combination with a cycle fork end or back jaw fitting comprising
two longitudinally separated, interiorly recessed or chambered and slotted sections.
clamped together by a nut on the extending end of a shouldered wheel spindle
passing therethrough, of chain adjusting fittings. comprising a draw bolt through
the head of which the aforesaid wheel spindle passes, a bearing plate, and a sleeved
nut, arranged and operating substantially as described and set forth.
Dated this 22nd day of Fehmiam. 1000
ROBERT FREDERICK HALL,
By Henry Skerrett,
24, Temple Row, Birmingham, Agent for Applicant.