Improvements in Driving Chains for Cycles, Motor Cars, and Mechanism, and in the Manufacture of the same.
Year: 1899

page_text: Date of Application, 2nd Dec., 1899
Complete Specification Left, 10th Aug., 1900-Accepted, 15th Sept., 1900
PROVISIONAL SPECIFICATION.
Improvements in Driving Chains for Cycles, Motor Cars, and
Mechanism, and in the Manufacture of the same.
I, WALTER BRAMPTON, of Formosa, Great Malvern, in the County of Worcester,
Gentleman, do hereby declare the nature of my said invention to be as follows:
-
My invention has for its object improvements in driving chains for cycles
motor cars and mechanism and in the manufacture of the same which are more
compact and less liable to catch any projecting parts with which the links may
come in contact and the outer links to which this invention particularly refers
are in the process of manufacture compressed and consolidated.
This invention refers in particular to the outer links of chains which are
more liable than the inner links to come in contact with the dress and other
parts and these links may be used with almost any class or design of chain_with
advantage. Each link during the process of manufacture is brought under a
powerful press or stamp and between dies one of which is correctly sunk or
hollowed out to give the exact outside or face shape required. This face shape
in cross or longitudinal or in fact any section rises in a curve from the inner
face continuing to curve to the edge of the rivets or holes the greatest thickness
of the link being attained at the centre of the link or where the holes are formed.
By this means the links are considerably consolidated and the finish of the
face is beautifully rounded more or less to a parabolic curve though the curve
may be concentric if desired.
WALTER BRAMPTON,
By George Barker,
Fellow of the Chartered Institute of Patent Agents,
Agent for Applicant,
7,7, Colmore Row, Birmingham.
Improvements in Driving Chains for Cycles, Motor Cars, and
Mechanism, and in the Manufacture of the same.
1, WALTER BRAMPTON, of Formosa, Great Malvern, in the County of Worcester,
0 Gentleman, do hereby declare the nature of my said invention and in what manner
Price 811

page_text: the same is to be performed to be particularly described and ascertained in and
by the following statement:-
My invention has for its object improvements in driving chains for cycles,
motor cars, and mechanism and in the manufacture of the same which are more
compact and less liable to catch any projecting parts with which the links may
come in contact and the outer links to which this invention particularly refers
are in the process of manufacture compressed and consolidated.
This invention refers in particular to the outer links of chains which are
more liable than the inner links to come in contact with the dress and other
parts and these links may be used with almost class or design of chain with
advantage. Each link during the process of manufacture is brought under a
powerful press or stamp and between dies one of which is correctly sunk or
hollowed out to give the exact outside or face shape required. This face shape
in cross or longitudinal or in fact any section rises in a curve from the inner
face continuing to curve to the edge of the rivets or holes the greatest thickness
of the link being attained at the centre of the link or where the holes are formed.
In order that my invention may be more clearly understood and easily carried
into practical effect I have appended hereunto a sheet of drawings upon which
I have illustrated examples of a driving chain the outer links of which are
made according to my invention but it will be evident these outer links may be
used with almost any design of chain.
Figure 1 is a side elevation shewing a short length of a driving chain made
according to my invention.
Figure 2 is a plan view of a short length of chain shewing each of the outer
links 1234 and 5 of a different longitudinal curve or form.
Figure 3 is an end view of Figure 1.
Figure 4 is an enlarged cross sectional view of the outside plates of one of
the links as shewn at Figure 1.
In carrying my invention into practice each link L during the process of
manufacture is brought under a powerful press or stamp and between dies one
of which is sunk or hollowed out to give the exact outside or face shape required.
This face shape in longitudinal and cross section rises in a curve from the inner
face continuing to curve to the edge of the rivet holes r the greatest thick-
ness of the link being attained at the centre 13. In the case of the links as
shewn at Figure 2 the first link marked 1 is thicker in the centre 13 than the next
link marked 2 and so on, the link marked 4 being almost the same thickness in
the centre in longitudinal section as in cross section through the centre of the
rivet holes r¹ but the link marked 5 is the same thickness centrally in longitudinal
section as in cross section centrally through the rivet holes thus the greatest
thickness of the link being attained at the centre of the link or where the rivet
holes are formed. In all cases the outside or coupling links L are formed
with a rounded or curved surface in cross section as clearly shewn at Figure 4.
By this means the links are considerably consolidated and the finish of the face
1 of each outer link L is beautifully rounded more or less to a parabolic curve
though the curve may be concentric, if desired.
The inner links B are formed in the ordinary manner and connected to the
outer links L by the rivets 2 the friction rollers R being interposed between
the inner links as clearly shewn at Figure 2.
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:
CLAIM
The improvements in driving chains for cycles motor cars and mechanism and
in the manufacture of the comd
ranciatin
1

page_text: rounded surface which may also be so curved longitudinally the entire length or
flat the ends longitudinally only being rounded to the parabolic curve substantially
as and for the purpose herein set forth and shewn upon the drawings.
Dated this 9th day of August 1900.
WALTER BRAMPTON,
By George Barker,
Fellow of the Chartered Institute of Patent Agents,
Agent for Applicant,
77, Colmore Row, Birmingham.