Improvements relating to Certain Parts of Cycle Frames.
Year: 1899

page_text: Date of Application, 8th. Sept., 1899
Complete Specification Left, 28th Apr., 1900-Accepted, 2nd June, 1900
PROVISIONAL SPECIFICATION.
Improvements relating to Certain Parts of Cycle Frames.
I, CHARLES THOMAS BROCK SANGster, General Manager of the Cycle Com-
ponents Manufacturing Company Limited, of Bournbrook, near the City of
Birmingham, do hereby declare the nature of this invention to be as follows:-
This invention has relation to certain parts of cycle framings, and principally
to the junctions or connections between the upper terminations of the back
stays of a bicycle frame and the seat lug or seat-pillar clip of the same.
In such junctions or connections of that class in which the back-stay ends (or
the lugs receiving the back-stay ends) are made solid with the seat pillar cup,
the whole fitting is usually made in a single solid casting, which in addition to
the defect or requiring considerable boring, machining and filing to fashion it
to the desired shape-has a further disadvantage inasmuch that the lugs onto
which the upper ends of the back stays are fitted project at a fixed angle from
the seat clip lug and thus is only available for one particular size of framing,
so that a number of castings with the lugs at varying angles have to be made
to suit different sizes of frames.
The object of my invention is to provide a fitting of this class which admits
of being applied and set with the lugs at any angle according to the size of the
frame or the inclination of the back stays and this I propose to accomplish as
follows: The seat lug or clip is made of the usual figure with the seat tube
socket part split vertically at the back to admit of it being closed around the
saddle pillar by drawing together the sides of the split through the medium
of a transverse pin passing through a pair of eyed ears projecting from the back.
The said ears may be hollow and each have on their outer faces, a collar short
sleeve or neck surrounding the hole through which the pin passes. The back
stay end pieces may be separately formed in the required shape by drop-stamping
or otherwise and the parts onto which the stays take may either be round, D
or other shaped, according to the section of the stays themselves. The outer
edge of the end is concaved or so formed as to come and work hinge-wise upon
the corresponding edge of the ear, whilst a side of the end fitting is extended
into a plate, preferably of a circular figure, with its edges coming flush with those
of the ear and with a central hole taking over the collar or neck on the outer side
of the ear and which collars form centres whereon the stay ends may be turned
to any suitable angle relative to the body of the junction lug.
In building up a frame, the stay ends are set to the desired angle, which is
governed by the size of the frame or the rake of the back stays, and are then
brazed in position, little or no subsequent dressing being required to give
them the finished shape.
The application of my invention to other parts of cycle frames, such as the
connections between the back stays and the chain stays, differs in no essential
respect from its application to a back stay and seat lug junction as herein
described.

page_text: improvements relating to Certain farts of Cycle Frames.
I, CHARLES THOMAS BROCK SANGSTER, General Manager of the Cycle Com-
ponents Manufacturing Company Limited, of Bournbrook, 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 has relation to certain parts of cycle framings, and principally
to the junctions or connections between the upper terminations of the back
stays of a bicycle frame and the seat lug or seat-pillar clip of the same.
In back-stay junctions or connections of that class in which the. back-stay
ends (or lugs receiving the back-stay ends) are made solid with the seat pillar
clip, the whole fitting is ordinarily made in a single casting, which in addition
to requiring considerable boring, machining and filing to fashion it to the desired
shape has the further disadvantage that the lugs onto which the upper ends of
the back stays are fitted project at a fixed angle from the seat clip lug and
thus each fitting is only available for one particular size of framing, so that a
number of castings with the lugs at varying angles have to be made to suit
different sizes of frames.
One object of my invention is to provide a fitting of this class having adjust-
able back stay lugs which admit of being set at any angle relative to the clip
casting, according to the size of the frame required, or the inclination of the
back stays, whilst a further object is to give the appearance of flush joints at
the junction of the seat pillar clip of the eyed bosses or lugs which are brazed
into the stays.
Figure 1 of the accompanying drawings represents an elevation of a cycle
frame having fixed or non-detachable back stays and provided with back stay
junction fittings in accordance with my invention.
Figure 2 is an end view of the said frame.
Figure 3 represents, upon an enlarged scale, a side elevation of the improved
junction fitting, with the end of the back stay in section. The dotted lines in
this view indicate another angle to which the back stay may be set before
being brazed in position, in order to suit a frame of a different size.
Figure 4 is a sectional view of Figure 3, taken upon the dotted line a.
Figure 5 is a back elevation of the seat clip, and back stay fittings separately,
or before being assembled, adjusted and brazed up.
Figure 6 is an elevation of the inner side of one of the stays with its attach-
ment lug.
Figure 7 is a horizontal section of Figure 5 upon the dotted line ..
Figure 8 shows a separate view of the pin which secures the clip around the
seat pillar, but which has no function as a means for securing the back stay
Ings to the said clip.
Figure 9 represents a plan of the fitting with the parts assembled and adjusted,
before being brazed up.
Figure 10 is a similar view of the junction after being brazed and dressed or
finished, showing the solid and flush appearance of the joint.
.
Figure 11 shows my invention as applied to the framing of a ladies bicycle.
The same letters of reference indicate corresponding parts in the several
figures of the drawing.
According to this form of my invention, the seat-pillar clip a, is made of
the usual figure with the socket-part a split vertically at a, down the back to
admit of it being closed around the saddle pillar by drawing together the sides

page_text: of the split through the medium if a transverse pin b, passing through a pair
of eyed ears e projecting from the back. The said ears each have on their outer
faces, a collar, short sleeve, or neck e surrounding the hole through which.
the pin passes. The back stay end lugs d, may be separately formed in the
required shape by drop-stamping or otherwise and the parts onto which the
back stays take may either be round, 1 or other shaped, according to the
section of the stays themselves. An edge of the lug is concaved at or so
formed as to come and work knuckle or hinge-wise upon the corresponding con-
vexed edge, of the ear c, whilst a side of the end fitting is extended into a
plate preferably of a circular figure, with its edges coming flush with those
of the ear and with a central hole taking over the collar or neck on the
outer side of the ear and which collars form centres whereon the stay ends may
be turned for adjustment to any suitable angle relative to the body or clip
part of the junction lug.
In building up a frame, the stay ends are set to the desired angle, which is
governed by the size of the frame or the rake of the back stays, and are then
brazed in position, little or no subsequent dressing being required. When
finished, the back stay lugs or ends have the appearance of being integral or
solid and flush with the casting of the seat pillar clip.
The application of my invention to other parts of cycle frames, such as the
connections between the back stays and the chain stays, differs in no essential
respect from its application to a back stay and seat lug junction as herein
described.
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 An adjustable junction fitting between the seat pillar clip and back
stay lugs of cycle frames having fixed back stays, consisting in the combina-
tion with a clip provided with ears having circular edges, of stay lugs having
corresponding concaved edges for working upon the said ears, and side plates
having piercings adapted to take over necks or collars on the sides of the said
ears, with the collars forming centres about which the stay ends are turned for
adjusting the relative angles of the parts prior to the brazing up of the same
in their set positions substantially as herein described and also as set forth
in the accompanying drawings.
Secondly In adjustable junction fittings for connecting the back stay lugs
to the seat pillar clips of cycle frames having fixed or non-detachable back stays,
the construction and arrangement of the several parts as herein described and
also as set forth in the accompanying drawings whereby solidity of appearance,
with flush joints, are obtained at the junction of the pillar clip with the lugs
which are brazed to the stays.
:
Thirdly Adjustable junction fittings for connecting fixed or non-detachable
back stays to cycle framings, comprising the several parts constructed and arranged
as herein described and also as set forth in the accompanying drawings, whereby
flush joints of a solid appearance are obtained.
Dateu Im18 240TH DAY OF ADRI 1900
Dated LMS <H OHN OF ADC11 1900
CHARLES THOMAS BROCK SANGSTER.
By Henry Skerrett,
24, Temple Row, Birmingham, Agent for Applicant.