Improvements in the Manufacture of Bolts for Doors and other similar Purposes.
Year: 1888

page_text: COMPLETE SPECIFICATION.
Improvements in the Manufacture of Bolts for Doors and other
similar Purposes.
I JOHN HOWARD CARTLAND of Constitution Hill, Birmingham Brassfounder
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 manufacture of the bolt barrels or sockets, and their
staple ends, for doors and other similar purposes, such as are generally known as
barrel or socket bolts, and consists in making such bolt barrels &c., of a certain cross
sectional form, that is, having a close "necked in" sectional form, their said
manufacture being conducted and carried out in the manner following:
In order to more clearly describe this my invention I have appended hereunto an
illustrative sheet of drawings, upon which are figures and letters of reference, similar
letters referring throughout the several views to the same thing or part, and in
which;
Fig. 1 represents a blank piece of metal, from which the bolt barrel or socket is to
be made.
Fig. 2 represents the first operation upon the blank.
Fig. 3 represents the tools used for the second operation, and ready for such
operation.
Fig. 4, represents the tools Fig. 3 after the said operation has taken place.
Fig. 5, shews the partly made barrel or socket subsequent to the third operation.
Fig. 6 shows an arrangement of tools for the "necking in" process, and the partly
formed barrel, in position, ready for such "necking in."
Fig. 7 illustrates the tools in Fig. 6, after the "necking in" process has been
completed.
Fig. 8, shows a spring clip to be inserted in the said barrel.
Fig. 9 illustrates the position of the spring clip in the barrel.
Fig. 10, is an elevation of a bolt and staple end, made and completed according to
this my invention.
Fig. 11, is a plan of Fig. 10.
Fig. 12 is a sectional elevation of Figs. 10 & 11.
10
1 A
R & C D

page_text: I provide a piece of metal a, cut to the required size to form the barrel 6 of the
bolt. I then pierce the two cross slots c, c as seen in Fig. 2; then place the blank
in a pair of tools as seen in Fig. 3, when by bringing down the top tool d in a press,
the projecting rib e forces the metal into a U shape having two side plates f as seen
in Fig. 4, the bottom die g being made to correspond.
The tools as seen in Figs. 3, 4, 6 & 7, illustrate their cross sectional form, their
length being suitable to the length of bolt barrel to be made. I then place the partly
made barrel, in suitable cutting out tools, and form the longitudinal slot h, between
the two cross slots c, c, (see Fig. 5).
"
"
I next proceed to neck in the said barrel by the tools and process seen in
Figs. 6 & 7. is a bed or base, carrying the bevilled sliding forming, or necking
blocks jj.
These two necking blocks are kept apart automatically, by means of a spring or
springs as seen for instance at k
The upper part of these two blocks upon their insides are hemispherically grooved
at 1, 1, to correspond to the exterior of the barrel of the bolt; and upon their outsides,
is formed the bevil portions m, m.
n, is the top tool, having corresponding bevil surfaces o, o, to those at m, m, in the
bottom 'tool.
Upon placing the piece Fig. 5, in the tools as seen in Fig. 6, with a mandril p
lying in the recessed portion, then bringing down the top tool n, causes the two sliding
blocks jj, to approach each other by reason of the contact of the bevil surfaces o, o,
upon those of m, m, and thus the barrel part is "necked in as seen in Fig. 7.
"
Upon again raising the top tool, the spring k, automatically opens the blocks j, j,
as seen in Fig. 6, when the now "necked in " barrel may be removed, and the
mandril p, taken therefrom.
I then provide a spring clip piece q Fig. 8, of thin springy metal and open the
one end of the "necked in" portion of the barrel to receive it, as seen in Fig. 9,
the shank part of which is nipped tightly in the neck of the barrel, while the
clips s, s, clip the sliding circular bolt t, as seen in Fig. 14.
At the rear end of the barrel, I insert a piece u, and secure it by closing the said
barrell end tightly upon it, or by soldering or other suitable means.
The bolt t is prepared in the usual manner, having the knob or handle v similar
as usual.
The staple end wis produced similarly as described for Figs. 1, 3, 4, 6 & 7.
The parts thus formed are provided with screw down holes a, as may be required;
and polished or otherwise finished according to taste or necessity, as ordinarily.
Having now particularly described and ascertained the nature of this my said
invention and in what manner the same is to be performed, I declare that what
I claim is :-
1. The improvements in the manufacture or production of door and other bolts for
various purposes, hereinbefore described and illustrated in the accompanying drawings,
that is to say, producing such bolts having a close "necked in "shaped section of
barrel & staple end, as seen in Fig. 13, by the combination of processes or method,
described and illustrated.
2. The "necking in" of the barrel of the bolt socket b, and the staple end w, by
means of the combination of the parts constituting the operating tools, substantially
as hereinbefore described and illustrated in Figs. 6 & 7.
D
30
CHARLES T. POWELL,
12, Cherry Street, Birmingham,
Applicant's Agent.