Improvements in the Manufacture of Metal Cases for use on Cycles and other like purposes.
Year: 1892

page_text: Date of Application, 11th Aug., 1892
Complete Specification Left, 11th May, 1893-Accepted, 17th June, 1893
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Metal Cases for use on Cycles
and other like purposes.
We, JOHN MARSHALL STARLEY and WILLIAM STARLEY, of St. John's
Works, Cycle Manufacturers, and THOMAS GROVES, of Psycho Villas, Starley
Road, Engineer, all of Coventry, in the County of Warwick, do hereby declare
the nature of this invention to be as follows:-
The invention relates to the manner in which we construct metal cases or boxes
from sheet metal instead of constructing them from a block stamping, or from a
casting as at present. The cases or boxes being employed to carry the crank axle
or for the ball head or for the front fork crown or other junction bosses, when
employed upon a cycle; also employed for other like purposes where it is desired
to combine lightness with economy of manufacture and strength of construction.
In carrying our invention into effect when constructing a crank axle case for a
cycle, we form the case or box out of sheet or plate metal, and we wrap or bend
the strip or plate round to form a circular barrel or tube, the ends of the plate
being nipped together at the completion or joining of the cylindrical surfaces and
then bent out to form a projecting pair of jointing plates or cars capable of being
attached to any tube, rod or other article in the manner described. These pro-
jecting jointing plates we prefer however to rivet together making thereby an ear
of flat bar surface of double the thickness of the metal in the barrel portion of
the case.
We prefer to join the tubes of our cycle to this jointing plate or ear by cutting
or piercing the tubes in the form of a saw-cut or slit having a width equal to the
thickness of the plate, and a depth equal to the depth of the projection, so that
when the ear or plate is passed into the tube or tubes, the slits or saw-cuts are thus
filled.
To more effectually secure the plate to the tube or tubes we sometimes pass a
rivet or rivets through the combined tube and joint plate before brazing their
meeting surface together; and we also prefer to braze the meeting or joining
surfaces of the edges of the metal forming the barrel or tube portion of our
improved case.
When we have thus constructed a case from sheet metal we prefer to bore out
or clean up the ends for the reception of the cups for the crank axle bearing, the
cups being formed and rigidly secured within the ends of the case in the usual
ordinary manner. The projecting jointing strip or plate we arrange to suit any
desired bar, tube or other fitting it is desired to secure thereto, cutting away the
portion not required for jointing purposes or leaving it as a web or stiffener standing
between the two connected tubes when so desired.
We do not limit the application of our invention of manufacturing metal cases
from strip or sheet metal to any particular form or shape of case that is to be
constructed for any particular purpose, but we employ the same essential features
hereinbefore described when constructing a case or box for any like purpose.
By this our improved system of constructing bearing cases for cycles we are
enabled to reduce the weight of the machine while prodncing a less costly and at
the same time stronger form of case than is at present possible with the same
weight of metal.
Dated this 10th day of August 1892.
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in the Manufacture of Metal Cases for use on Cycles
and other like purposes.
We, JOHN MARSHALL STARLEY and WILLIAM STARLEY, of St. John's
Works, Cycle Manufacturers, and THOMAS GROVES, of Psycho Villas, Starley
Road, Engineer, all of Coventry in the County of Warwick, 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 manner in which we construct metal cases or boxes
from sheet metal instead of constructing them from a block stamping, or from a
casting as at present. The cases or boxes being employed to carry the crank axle
or for the ball head or for the front fork crown or other junction bosses, where
employed upon a cycle; also employed for other like purposes where it is desired
to combine lightness with economy of manufacture and strength of construction.
In the accompanying sheet of explanatory drawings-
Figure 1 shows a sectional elevation of a steering socket constructed in
accordance with the present invention, while Figures 2 and 3 show sections on
the lines vw and x y respectively; and Figure 4 shows a plan of the tube C
(Figure 1).
Figures 5 and 6 show in sectional elevation and plan respectively, a saddle pillar
junction boss made according to our present invention; while Figure 7 shows a
sectional elevation on the line tu (Figure 6).
Figures 8 and 9 show in sectional elevation and plan respectively the construction
of a bearing or axle box in accordance with the present invention.
Figure 10 shows in elevation (part in section) the construction of a steering
fork crown in accordance with our present invention, while Figure 11 shows a
section on the line vw (Figure 10) and Figure 12 shows a section on the line a y
(Figure 10).
Figure 13 shows a section through p 9 (Figure 1).
In carrying our invention into effect when constructing a steering socket out of
sheet instead of stamped or cast metal as shown in Figure 1, we form the case or
socket A out of sheet or plate metal and we wrap or bend the strip or plate to
form a circular barrel or tube, the ends of the plate being nipped together at the
completion or joining of the cylindrical surfaces as shown at A', and at A¹ A'
Figures 2 and 3, and then bent out to form a projecting pair of jointing plates or
cars A¹ A capable of being attached by our improved method hereafter described
to the frame tubes or members CD.
We join the tubes CD to the jointing plate or seam plate A' A' by cutting or
piercing the tubes in the form of a saw cut or slit such as C¹ (Figure 4) and of a
depth equal to the depth of the projection of the plate, so that when the seam
plate or joint plate has been passed into the tubes the slits or saw cuts are thus
completely filled.
Figure 3 shows in cross sectional plan the socket A and tube C joined together,
and Figure 4 is a detailed plan of the tube C showing the slot or saw cut C¹ for
receiving the projecting plate.
Figures 5, 6 and 7 show our invention carried into effect when constructing a
saddle pillar junction boss. We form the joint or junction box or case A in the
manner herein before described with reference to Figure 1, when constructing &
steering socket out of sheet or plate metal, and we wrap or bend the strip to form
projecting plates or ears A' A' to enter a saw cut or slit made for their reception
in the tube member C.
Figures 8 and 9 show our invention carried into effect when constructing a crank
axle box or case for a cycle, in which we form the box or case A out of sheet or
plate metal in the manner hereinbefore described with reference to Figure 1, and

page_text: cause the projecting plates or ears A' A' formed therefrom to enter saw cuts
formed on the tube members C C. When we have thus constructed a case or box
from sheet metal we prefer to bore out or clean up the ends for the reception of
the cups for the crank axle bearing, the cups being formed and rigidly secured
within the ends of the case in the usual ordinary manner.
Figures 10, 11 and 12 show our invention carried into effect when constructing a
steering fork crown A which we form as a circular case from sheet or plate metal
as hereinbefore described with reference to Figure 1.
"
Figure 13 shows a section on the line p q Figure 1, when we employ "filling in
pieces or tubes C2 C3 for the purpose of strengthening the joint and for increasing
the brazing surfaces.
To more effectually secure the double plate to the tube or tubes we sometimes
pass a rivet a or rivets through the combined tube and joint plate A¹ A³ before
brazing their meeting surfaces together; and we also prefer to braze the meeting
or joining surfaces of the edges of the metal forming the barrel or tube portion of
our improved case A.
The projecting jointing double strip or plate we arrange to suit any desired bar,
tube or other fitting it is desired to secure thereto, cutting away the portion not
required for jointing purposes or leaving it as a web or stiffener standing between
the two connected tubes when so desired.
We do not limit the application of our invention of manufacturing metal cases
from strip or sheet metal to any particular form or shape of case that is to be
constructed for any particular purpose, but we employ the same essential
features hereinbefore described when constructing a case or box for any like
ригрове.
By this our improved system of constructing metal cases or boxes for cycles we
are enabled to reduce the weight of the machine while producing less costly and
at the same time stronger forms of cases than are at present possible with the same
weight of metal.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. The construction of metal cases or boxes for use on cycles and for like
purposes, having the cylindrical portion formed by bending a strip or flat sheet of
metal round, and having the joining edges formed by carrying out the ends of the
strip to form a web or flanged ear, substantially as herein before described and as
illustrated in the accompanying drawings.
2. The construction of cycle axle bearing boxes, sockets and other like fittings
from sheet metal, having a projecting web or pair of webs for entering into a tube
or tubes, rod or rods, substantially as and for the purposes hereinbefore described
and as illustrated in the accompanying drawings.
Dated this 10th day of May 1893
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for the Applicants.