Improvements in the Manufacture of the Cases or Barrels and Staples of Socket Bolts for Doors and other Articles.
Year: 1890

page_text: Date of Application, 26th Nov., 1890
Complete Specification Left, 29th July, 1891-Accepted, 29th Aug., 1891
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of the Cases or Barrels and
Staples of Socket Bolts for Doors and other Articles.
I GEORGE CLARKE, of Murdoch Road, Handsworth in the County of Stafford
Brassfounder do hereby declare the nature of this invention to be as follows:-
My invention has reference to the manufacture of the cases or barrels and
staples of bolts for doors and other articles from sheet metal and consists of the
improvements in the said manufacture hereinafter described.
In making the case or barrel of a bolt according to my invention I take a
flat strip of sheet metal, brass for example and by the drawing process give
to the middle of the said strip a nearly tubular figure the outer portions of the
said strip being preserved in the same plane. The strip of metal drawn as
described has in cross section the figure or nearly the figure of the barrel and
plate of a door bolt.
Where it is desired to give the plate of the bolt greater strength than that
of the barrel I effect that object by the addition of a flat strip of metal, prefer-
ably iron to the plate made as described. In this case I employ in the formation
of the barrel and plate a strip of metal of somewhat greater width than that
I employ when the plate has not to be strengthened and I connect the strengthen-
ing strip of iron to the underside of the plate by turning over the edges of the
plate upon the strengthening strip. The said strenthening strip is thereby firmly
secured to the plate and virtually constitutes a part of the plate.
The strip of sheet metal fashioned by the drawing process and where desired
strengthened as herein described is cut into pieces of the lengths required for
cases or barrels and staples and the said pieces are finished in the usual way.
That is to say, in the case or barrel the required longitudinal and cross slots for
the handle of the rod or bolt proper to slide in are made and in the plates of the
bolt case and staple holes are made for the attaching screws to pass through.
Dated this 26th day of November 1890.
W. T. WHITEMAN.
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of the Cases or Barrels and
Staples of Socket Bolts for Doors and other Articles.
J GEORGE CLARKE of Murdock Road Handsworth in the County of Stafford
Brassfounder do hereby declare the nature of my invention and in what manner the
same is to be performed to be particularly described and ascertained in and by
the following statement :-
My invention has reference to the manufacture of the cases or barrels and staples
of bolts for doors and other articles from sheet metal and consists of the improve-
ments in the said manufacture hereinafter described.
In making the case or barrel of a bolt according to my invention I take a flat
strip of sheet metal, brass for example, and by the drawing process I give to the
middle of the said strip a nearly tubular figure the outer portions of the said strip
being preserved in the same plane. The strip of metal drawn as described has
in cross section the figure or nearly the figure of the barrel and plate of a
door bolt.
Where it is desired to give the plate of the bolt greater strength than that of the

page_text: barrel I effect that object by the addition of a flat strip of metal preferably iron to
the plate made as described. In this case I employ in the formation of the barrel
and plate a strip of metal of somewhat greater width than that I employ when the
plate has not to be strengthened and I connect the strengthening stripiof iron to the
underside of the plate by turning over the edges of the plate upon the strengthening
strip. The said strengthening strip is thereby firmly secured to the plate and
virtually constitutes a part of the plate.
The strip of sheet metal fashioned by the drawing process and where desired
strengthened as herein described is cut into pieces of the lengths required for cases
or barrels and staples and the said pieces are finished in the usual way. That is to
say in the case or barrel the required longitudinal and cross slots for the handle of
the rod or bolt proper to slide in are made and in the plates of the bolt case and
staple holes are made for the attaching screws to pass through.
I will now proceed to describe with reference to the accompanying drawings the
manner in which my invention is to be performed.
In making the cases or barrels and staples of socket bolts according to the first
described method I take a long strip of sheet brass of the kind represented in
Figure 1 and by a drawing process effected by the use of one or more dies fixed in
a draw bench, I give to the said strip the form represented in end elevation and
plan in Figure 2; that is to say I give to the middle of the strip a trough form
marked a the marginal parts b, b from which the plate of the case or barrel is to be
made being preserved in the same plane as represented. By a further drawing
operation the trough a in the middle of the strip is closed so as to give a cylindrical
figure to it and the plate parts, 6 on either side of it are brought together. or
nearly in contact as represented in end elevation and plan in Figure 3. The strip
of metal thus drawn has in cross section the figure of the case or barrel and plate
of a socket bolt.
The strip of metal Figure 3 fashioned by the drawing process is cut transversely
by sawing into pieces or lengths suitable for the cases or barrels and staples of
socket bolts as indicated by the dotted lines in Figure 3, the pieces or lengths
marked r, c of the strip being suitable for the cases or barrels and the shorter pieces
or lengths marked d, d for the staples of bolts.
Figure 4 represents in plan and Figure 5 in longitudinal section a socket bolt
the case or barrel and staple of which are made from the cut off pieces of the drawn
strip described.
In converting the cut off pieces or lengths into the cases or barrels of the bolts
each of the cut off pieces c is provided with the longitudinal and cross slots
at e, e for the handle of the rod or bolt proper to work in; one end of the
case or barrel is closed at g and countersunk holes for the fixing screws are
made in the plate of the case. The strips d to form the staples are each
closed at one end and countersunk holes made in the plate part for the fixing
screws.
In making cases or barrels and staples of socket bolts according to the second
described method so as to give the plate of the bolt greater strength than that of
the case or barrel I proceed in the following manner.
I take the broad strip of sheet brass Figure 6 and by one or more drawing
operations I give to the said broad strip the form represented in Figure 7; that is,
I give to the middle of the strip the trough form a for the barrel or case of the bolt
leaving unoperated upon the marginal parts 66 of the strip to form the plate of the
finished case or barrel but the edges of the strip by the drawing operation or
operations are bent at right angles to the parts b, b and afterwards parallel to the
parts b, bas represented at 62 6². There is thereby formed a drawn strip having in
cross section the figure of the barrel and plate of a socket bolt and having on the
underside and along the edges of the plate b, b longitudinal seats at 6², 6². I next
take the strengthening strip of iron represented in Figure 8 and insert it by a sliding
motion in the longitudinal seats or edges 6, 6 of the drawn strip Figure 7 and
preferably by a drawing operation. I close the edges or seats 6³,
82
upon the

page_text: strengthening strip as represented in cross section plan and longitudinal section in
Figure 9 where the barrel part of the strip is marked a the plate 6 and the
strengthening strip i. By thus closing the parts or seats 62 62 on the strengthen-
ing strip i it is firmly secured to the plate bb and virtually forms a part of the
plate.
The compound strip Figure 9 is cut transversely into pieces of the lengths required
for the cases or barrels and staples of the bolts as indicated in dotted lines and as
hereinbefore described with respect to the unstrengthened strip Figure 3 and the cut
off lengths or pieces are finished in the manner described with respect to Figures 4
and 5.
Figures 10 and 11 represent a finished socket bolt and its staple made from strips
or pieces having the sectional figure of the compound strip shown in Figure 9 and
Figure 12 represents the finished staple detached.
Although I prefer to secure the strengthening strip i to the plate part of the
drawn strip by a drawing operation as described yet the seats or edges 6² 6² of
the drawn strip may be closed upon the strengthening strip by rolling hammering
or otherwise.
Having now particularly described and ascertained the nature of my invention
and the manner in which the same is to be performed I declare that I claim as
my invention:-
First-Manufacturing the cases or barrels and staples of socket bolts for doors.
and othe: articles by first fashioning by a series of drawing operations a flat strip
of sheet brass or other ductile sheet metal or alloy into the figure in cross section
of the barrel and plate of a door bolt and its staple, cutting the drawn strip trans-
versely into pieces of the lengths required for the cases or barrels and staples and
finishing the said cut off pieces so as to convert them into the cases or barrels
and staples of socket bolts substantially as hereinbefore described and illustrated in
Figures 1. 2. 3. 4 and 5 of the accompanying drawings.
Secondly-Manufacturing the cases or barrels and staples of socket bolts for
doors and other articles from a compound or strengthened drawn strip of the kind
hereinbefore described and illustrated in Figure 9 of the accompanying drawings;
that is to say forming from a flat strip of sheet brass or other ductile sheet metal
or alloy by a drawing process a strip having in cross section the figure of the barrel
and plate of a bolt and its socket together with turned in edges or seats on the
underside of the plate part and strengthening the said drawn strip at the
plate part by a strengthening strip of iron secured preferably by a drawing
operation to the underside of the said plate part the compound or strengthened
strip being made into the cases or barrels and staples of socket bolts substantially as
hereinbefore described and illustrated in Figures 6. 7. 8. 9. 10 and 11 of the
accompanying drawings.
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