IMPROVEMENTS IN THE MANUFACTURE OF SUNK-SLIDE FLUSH AND KNOB BOLTS to be as follows:- FOR DOORS AND OTHER ARTICLES
Year: 1884

page_text: I FREDERIC ARTHUR HARRISON of Legge Lane Birmingham in the County of
Warwick Manufacturer do hereby declare the nature of the 'said Invention for
"IMPROVEMENTS IN THE MANUFACTURE OF SUNK-SLIDE FLUSH AND KNOB BOLTS
to be as follows:-
FOR DOORS AND OTHER ARTICLES
"
In the ordinary method of manufacturing the said bolts the case or plate of the
bolt as well as the thumb piece are made by the process of casting. In making one
of the said bolts according to my invention I take a strip of brass or other metal
or alloy of which the case or plate of the bolt is to be made the said strip being of
a width equal to the width of the case and of a length equal to the sum of the
lengths of the finished case and its bottom part through which the shoot or bolt
I make
works which bottom part is at right angles to the other part of the case.
the box of the case that is the sunken part in which the thumb piece slides by
means of a pair of dies or tools of the required shape and operated by means of a
press or stamp the said box being near one end which I will call the top end of the
strip. I afterwards by the use of other dies or tools pierce countersunk holes near
the ends of the strip for the attaching screws to pass through and also a cylindrical
hole near the bottom end of the strip for the shoot or bolt to work through.
I pierce an oblong longitudinal slot-hole at the bottom of the box for the shank or
neck of the thumb piece 'to pass through and work in. The bottom end of the
strip is next bent at right angles a short distance above the cylindrical or shoot
hole described. I form the thumb piece and its shank by cutting out from sheet
metal at a press. The shoot or bolt is made in the ordinary way and the shank of
the thumb piece is attached to the head of the shoot by rivetting as usual. The
case of the bolt is dressed or finished in the ordinary manner.
Instead of making the box or sunk part in one piece with the strip forming the
case the said box or sunk part together with the required slot may be inade
separately from the strip by stamping or pressing and a hole of the necessary form
and size having been pierced in the strip near its upper end the box or sink part
may be attached to the back of the strip by soldering or rivetting. Or the sides
of the box or sunk part may be made from the strip and a separately made bottom
having the required alot rivetted or soldered thereto.
Or the box or sunk part may be dispensed with. In this case a longitudinal
slot hole is pierced in the strip and the shank of the thumb piece or the shank of a
knob passed through the said slot-hole and rivetted to the shoot or bolt.
W. T. WHITEMAN,
Agent for the Applicant.

page_text: I FREDERIC ARTHUR HARRISON of Legge Lane, Birmingham in the County of
Warwick Manufacturer do hereby declare the nature of my Invention for
"IMPROVEMENTS IN THE MANUFACTURE OF SUNK-SLIDE, FLUSH AND KNOB BOLTS
FOR DOORS AND OTHER ARTICLES and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement:
"
In the ordinary method of manufacturing the said bolts the case or plate of the
bolt as well as the thumb piece are made by the process of casting. In making one
of the said bolts according to my invention I take a strip of brass or other metal
or alloy of which the case or plate of the bolt is to be made the said strip being of
a width equal to the width of the case and of a length equal to the sum of the
lengths of the finished case and its bottom part through which the shoot or bolt
works, which bottom part is at right angles to the other part of the case. I make
the box of the case, that is, the sunken part in which the thumb piece slides, by
means of a pair of dies or tools of the required shape and operated by means of a
press or stamp the said box being near one end which I will call the top end of the
strip. I afterwards by the use of other dies or tools pierce countersunk holes near
the ends of the strip for the attaching screws to pass through and also a circular
bole near the bottom end of the strip for the shoot or bolt to work through.
I pierce an oblong longitudinal slot-hole at the bottom of the box for the shank or
neck of the thumb piece to pass through and work in. The bottom end of the
strip is next bent at right angles a short distance above the cylindrical or shoot
hole described. I form, the thumb piece and its shank by cutting out from sheet
metal at a press. The shoot or bolt is made in the ordinary way and the shank of
the thumb piece is attached to the head of the shoot by rivetting as usual. The
case of the bolt is dressed or finished in the ordinary manner.
Instead of making the box or sunk part in one piece with the strip forming the
case, the said box or sunk part together with the required slot may be made
separately from the strip by stamping or pressing and a hole of the necessary form
and size having been pierced in the strip near its upper end, the box or sunk part
may be attached to the back of the strip by soldering or rivetting. Or the sides
of the box or sunk part may be made from the strip and a separately made bottom
having the required slot rivetted or soldered thereto.
Or the box or sunk part may be dispensed with. In this case a longitudinal slot
bole is pierced in the strip and the shank of the thumb piece or the shank of a
knob passed through the said slot hole and rivetted to the shoot or bolt.
Figure 1 of the accompanying Drawing represents in front and side elevation
the shaped or fashioned strip of brass or other metal or alloy for forming the case
or plate of the bolt, the said strip being provided with the sunk part or box and
with countersunk holes and the shoot hole and Figure 2 represents a cross section
of the plate taken through the box or sunk part; a a³ is the plate or case of the
bolt and b-is the box or sunk part in which the thumb piece slides the said box

page_text: being made in one piece with the plate a by a pair of raising tools worked in a
stamp or press. The sides of the box bare inclined as best seen in the section
Figure 2 but the said sides may be straight or parallel. After the box b has been
shaped from the plate a an oblong slot hole c is made in the bottom of the said
box for the shank of the thumb piece to work in; d, d are the countersunk holes
at the top and bottom of the plate for the fixing screws and e is a circular hole
near the bottom part a³ of the plate for the cylindrical bolt or shoot to work in.
Having fashioned the plate in the manner represented in Figures 1 and 2, the
bottom end a' of the plate is bent at right angles at the dotted line f as shown in
the finished bolt represented in front and side elevation in Figure 3 and back
elevation and longitudinal section in Figure 4 and cross section in Figure 5.
Figure 6 represents the thumb piece and its shank made by cutting out from
sheet metal at a press, the sides of the thumb piece g being inclined to bear against
the inclined sides of the box b of the plate a. The sides of the thumb piece are
straight or parallel when the sides of the box are straight or parallel. h is the
cylindrical bolt having a flat head h³ for bearing against the flat bottom of the
box b. The cylindrical bolt or shoot h having been introduced into the shoot
hole e in the bottom a² of the plate the shank of the thumb plate g is passed
through the slot c in the bottom of the box b and through a hole in the flat head h
of the shoot h and rivetted on the back of the said flat head as represented in the
drawing. The cylindrical bolt or shoot h is thereby attached to the plate and the
bolt is complete. As the bolt or shoot h is shot or withdrawn the flush thumb
plate g bears against the inclined sides of the box b the motion of the bolt being
limited by the slot c in which the shank of the thumb piece works. A spring i
bearing against the cylindrical bolt holds it firmly in its shot or withdrawn
position.
The box or sunk part 6 slotted at its bottom may be made separate from the
plate a and attached to the back of the plate a by soldering or rivetting, an opening
being made in the plate a to the back of which opening the separate box or sunk
part b is attached.
Instead of forming the box or sunk part by means of dies worked in a stamp
or press the said box or sunk part may be made by applying pressure in other
ways.
Figure 7 represents in back elevation and Figure 8 in side elevation the
arrangement of my invention in which the slotted bottom of the box b is made
separately and attached by ears to the sides of the box or sunk part 6 made from
the plate a by stamping or pressing in any convenient way. Figure 9 represents
in elevation and Figure 10 in longitudinal section the finished bolt; Figure 11
represents the separate bottom and Figure 12 the thumb piece.
The open bottom box or sunk part 6 has along its longer edges, ears marked k k
and the slotted separate bottom has corresponding notches m, m made in its
longer sides. By engaging the notched edges of the separate bottom with the
ears k, k on the box b and closing the said ears upon the back of the bottom the
latter is fixed in its place and a closed box having a slotted bottom similar to that
herein first described is produced.
b
Or the box or sunk part 6 may be used with an open bottom as represented in
back elevation and longitudinal section (with the sliding bolt or shoot omitted) in
Figure 13; the bolt or shoot separately in Figure 14 and a cross section of the
complete bolt in Figure 15. In this modification the bottom of the box b is closed
by the flat head of the bolt or shoot h. the edges of the flat head h² being
inclined to fit and work against the inclined sides of the box b and the thumb
piece g is rivetted to the back of the flat part h² of the shoot as seen in the cross
section Figure 15.
I do not limit myself to the shape represented of the box or sunk part of the
3 plate of the bolt as other shapes may be given to the said box or sunk part.
Figure 16 represents in front elevation and side elevation and Figure 17 in
longitudinal section, a knob bolt the sunk part or box in the plate being dispensed

page_text: with. In this arrangement a longitudinal slot hole p is made in the plate a and the
shank of the knob q is passed through the said slot hole p and rivetted to the flat
head h of the bolt or shoot h. The knob q has at its back a covering plate r
which covers the slot hole p, whether the bolt h is shot or withdrawn.
Figure 18 represents in front elevation and longitudinal section a bolt of the last
described construction excepting that a thumb piece s is used in place of a knob
and the covering plate is omitted.
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 of "Improvements in the manufacture of sunk-slide flush and knob bolts
for doors and other articles
"
First Making the box or sunk part 6 in which the thumb piece of the sunk-
slide or flush bolt works by raising it from a part of the sheet metal case or plate
of the bolt and afterwards making an oblong slot in the bottom of the box or sunk
part for the shank of the sheet metal thumb piece to pass through and work in
substantially as herein before described and illustrated in Figures 1, 2 3, 4 and 5
of the accompanying Drawing.
b
Secondly Making the box or sunk part 6 separately from the plate or case and
attaching it to the plate or case by soldering or rivetting as herein before described.
Thirdly Making the sides of the box or sunk part b from the sheet metal plate
or case and closing the said box or sunk part by a separate slotted bottom l, m
substantially as herein before described and illustrated in Figures 7, 8, 9, 10 and 11
of the accompanying Drawing.
Fourthly Closing the open bottom of the box or sunk part b by the flat
head of the bolt or shoot instead of by a separate plate substantially as herein
before described and illustrated in Figures 13, 14 and 15 of the accompanying
Drawing.
Fifthly Making the plates or cases of sunk-slide flush and knob bolts of a strip
of strong sheet metal provided with a shoot hole for the bolt to work through and
in knob bolts with a slot for the stem of the knob or thumb plate to work in the
said slot being made in the plain strip or plate instead of in the bottom of a box
or sunk part substantially as herein before described and illustrated in the
accompanying Drawing.
Dated this Twenty seventh day of January 1885.