IMPROVEMENTS IN DOOR BOLTS
Year: 1878

page_text: LETTERS PATENT to John Petty, of Willenhall, in the County of Stafford,
Door Bolt Manufacturer, for the Invention of "IMPROVEMENTS IN DOOR
BOLTS."
Sealed the 27th May 1879, and dated the 30th November 1878.
PROVISIONAL SPECIFICATION left by the said John Petty at the Office
of the Commissioners of Patents on the 30th November 1878.
JOHN PETTY, of Willenhall, in the County of Stafford, Door Bolt Manufacturer.
" IMPROVEMENTS IN DOOR BOLTS."
The object of this Invention is to produce at a cheap rate a door bolt having the
plate, barrel, cheeks, and stump formed in one piece of metal, and thus to obviate
the necessity of riveting them together.
A door bolt constructed according to this Invention has the barrel and stump
trough-shaped and open at the back, being pressed out of the metal blank forming
the plate. The cheeks are pressed up out of the said blank, and the parts of the
plate between the barrel and cheeks and the cheeks and stump and at the front
end of the plate are formed of pieces solid to the blank on each side but butting
against one another in the centre.
In constructing a bolt made according to this Invention a blank is first pressed
out of a metal sheet by means of press tools. The said blank is next acted upon by
a second set of press tools constructed so as to press out transverse pieces of metal
from. between where the cheeks and barrel and the cheeks and stump are to be
formed, and also a transverse piece of metal from the front end of the blank, and a
longitudinal piece from the part between where the checks are to be formed, the
longitudinal opening thus formed extending the whole distance between the two
transverse openings formed towards the back end of the blank. The blank is then
acted upon by a third set of press tools, the moving tools of which are constructed
round-ended transversely of the blank, and cut and force down pieces of metal at
Duins C17

page_text: the extremities of the three transverse openings aforesaid. The blank is then acted
upon by a fourth set of press tools which press out the barrel and stump from the
metal of the blank into a trough-shaped form to receive the bolt-rod (made in the
usual manner), and at the same time force the cheeks (the metal of which has been
shaped by the former processes) into their proper position; and also flatten the end-
most pieces of metal (described as pressed down by the third set of tools), the
corresponding pieces meeting together at the centre and forming part of the base of
the plate. The bolt rod is then put into its place and the two middle or remaining
pieces of metal (described as pressed down by the third set of tools) are then
hammered or otherwise flattened down, and keep the bolt rod in place, and also
form part of the base of the plate. Screw holes are then formed in the plate, and
the bolt is complete.
A door bolt constructed according to this Invention is neat in appearance and is
less liable to get out of repair than an ordinary door bolt which has the parts
riveted to the plate.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Petty in the Great Seal Patent Office on the 29th May
1879.
JOHN PETTY, of Willenhall, in the County of Stafford, Door-bolt Manufacturer.
"IMPROVEMENTS IN DOOR BOLTS."
The object of this Invention is to produce at a cheap rate a door bolt having the
plate, barrel, cheeks, and stump formed in one piece of metal, and thus to obviate
the necessity of riveting them to-gether.
A door bolt constructed according to this Invention has the barrel and stump
trough-shaped and open at the back, being pressed out of the metal blank forming
the plate. A trough shaped part is also pressed up out of the said blank to form
the checks, and the bottom of the trough shaped part for the cheeks is afterwards
cut out to allow the bolt to pass. The parts of the. plate between the barrel and
cheeks and the cheeks and stump and at the front end of the plate are formed of
pieces solid to the blank on each side but butting against one another in the
centre.
In constructing a bolt made according to this Invention a plain blank is first cut
off a metal sheet in the usual manner, but to a greater width than for ordinary
bolts, as will be presently seen.
The said blank is next acted upon by a second set of tools constructed so as to
press out transverse pieces of metal from between where the checks and barrel and
the cheeks and stump are to be formed, and also a transverse piece of metal from
the front end of the blank. The blank is then acted upon by a third set of press
tools, the moving tools of which are constructed curved on the bottom transversely
of the blank, and slit and bend down pieces of metal at the extremities of the three
transverse openings. The blank is then acted upon by a fourth set of tools,
preferably worked in a stamp for the larger sizes, say, 6" and upwards, and in a
press for smaller sizes, which stamp or press out the barrel and stump from the
metal of the blank into a trough-shaped form to receive the bolt-rod (made in the
usual manner), and at the same time stamp down a trough shaped part where the
cheeks are to be formed, and also flatten the outer pieces of metal (described as
being bent down by the third set of tools), the corresponding pieces butting to-
gether at the centre and forming part of the base of the plate. The bolt-rod is then
put into its place and the two middle or remaining pieces of metal (also described
as being bent down by the third set of tools) are then hammered or otherwise
flattened down and keep the bolt-rod in place, and also form part of the base of the
plate. Screw-holes are then formed in the plate, and the bolt is complete.
A door bolt constructed according to this Invention is neat in appearance and is
less liable to get out of repair than an ordinary door bolt which has the parts
riveted to the plate.
Having thus stated the nature of my said Invention, I will now particularly
describe and ascertain the method of performing the same with reference to the
accompanying Drawings.
Figure 1 illustrates a blank which has been first cut to a plain rectangular shape.
The holes A, A, are then cut out by a pair of press tools and the hole B is after-
wards cut out by one of the tools used to cut out one of the holes A, or, if preferred,
three press tools may be used to cut out the holes A, A, and B at one operation,
but in this case the distance of the tool for the hole B from the tools for the
holes A, A, would have to be altered for each different length of blank. Figures 2
and 3 illustrate respectively a face view and end view of the same blank after being
acted upon by the next set of tools. Pieces of metal C, C, etc., are slit down at
each extremity of the holes A, A, and B of Figure 1. Figures 4 and 5 illustrate
respectively an edge view and flat view (shewing the bottom tool in section) of the
press tools used for slitting down the parts C, C, etc., of Figures 2 and 3. Q, Q, are

page_text: the top tools, and R the bottom tool. The slit down parts C, C, are shewn in
section at Figure 5. The blank, as illustrated by Figures 2 and 3, is next acted
upon by the stamping or press tools illustrated by Figures 6, 7, 8, and 9, of which
Figure 6 is a longitudinal section; Figures 7, 8, and 9, sections taken respectively
on lines x, x, y, y, and z, z, of Figure 6. The blank (Figures 2 and 3) is laid with
the face a (Figure 3) upon the bottom tool, with the openings b, c, and d (Figure 2)
respectively at b, c, and d'. The bottom die is trough-shaped (to the section
shewn at Figure 7) at E, F, and G, where the stump, cheeks, and barrel respectively
are to be formed. A piece of metal is let into the tool D at b₁ filling up the trough-
shaped part to the top of the tool and for the width of the hole in the blank (see
also Figure 9). Another piece of metal is let into the tool D at c' for the width of
the hole through the blank. The said piece of metal at c¹ is shaped as shewn at
Figure 8. The part of the tool at d' is flush with the top of the tool. The top
tool H is shaped in section as shewn at Figure 7, at the parts J, K, and L, but is
flush across the face at b¹ and d', and has an opening at c¹ to clear the part let into
the bottom tool at that point (see also Figure 8). The top tool H is allowed to fall
or descend as many times as may be necessary upon the blank, which is then
finished, as shewn by Figures, 10, 11, and 12, which are respectively a front, edge,
and end view of a bolt finished, all but the last operation.. The trough-shaped
parts M, N, and O are formed respectively by the parts J and E, K, and F, and L
and G (Figure 6). The parts C, C, etc., at the ends of the openings b and d
(Figure 2) are drawn butting to-gether as the trough-shaped parts are formed, and
are flattened at 6' and d¹ (Figure 6), forming the finished parts e and f. The
parts C, C, at the ends of the opening c (Figure 2) are further bent and opened out
at c (Figure 6, and see also Figure 8), and are thus shaped as shewn at g. The
part P of the trough-shaped part N is next cut out with a punch and bolster so as
to allow a passage for the bolt neck between the cheeks. The bolt is then put in
place (the bent parts g allowing of this), and the parts g are then hammered or
otherwise forced back, as at e and f. The holes for the screws are then made in
the usual manner, and the bolt is complete.
The barrel, stump, and cheeks may, of course, be made to suit a square or other
shaped bolt-rod if desired.
Having thus stated the nature of my said Invention, and particularly described
and ascertained the manner of performing the same, I declare that I do not limit
myself to the exact details as shewn, as such may be varied without departing from
the nature of my Invention, but what I claim as my Invention, and desire to secure
by Letters Patent is,-
The improved door bolt having the plate, barrel, cheeks, and stump formed in
one piece of metal, the barrel, stump, and part between the cheeks being open at
the back for their whole length and for about their entire width, substantially as
herein described, and illustrated by the Drawings.
In witness whereof, I, the said John Petty, have hereunto set my hand and
seal, this Twenty-third day of April, in the year of our Lord One
thousand eight hundred and seventy-nine.
Witness,
STEPHEN WATKINS,
Assoc. Inst. C.E.,
Patent Office,
Wolverhampton.
JOHN PETTY. (L.S.)`