provements in Flush and other Bolts for Doors and other like purposes, and in the Manufacture of the same.
Year: 1896

page_text: Date of Application, 3rd Feb., 1896
Complete Specification Left, 10th Oct., 1896-Accepted, 14th Nov.. 1996
PROVISIONAL SPECIFICATION
Improvements in Flush and other Bolts for Doors and other like
purposes, and in the Manufacture of the same.
We, EVERED AND COMPY. LIMITED, of Barnet Works, Birmingham, in the County
of Warwick, Manufacturers, and GEORGE CLARKE, Works Manager at Barnet Works,
Birmingham, aforesaid, do hereby declare the nature of this invention to be as
follows:-
The said invention has reference to flush and other bolts for doors and other like
purposes made from sheet metal; and consists of the construction and arrangement
of parts hereinafter described of the said bolts and in the manufacture of the same.
In making a flush bolt according to the said invention we take a strip of thin
sheet metal or alloy, preferably brass, and bend a portion near one end at right
angles to the main portion of the strip as usual and thereby form the fixing plate
of the bolt. The said short hent part is provided with the hole for the acting end of
the bolt to work in and also with a countersunk hole for an attaching screw to pass
through.
In the other or main part of the fixing plate at the part where the box or sunken
part for the thumb piece of the bolt to work in is to be formed we pierce an oblong
opening and between the said opening and the end of the fixing plate we make a
second countersunk or screw hole. At the back of the fixing plate described and opposite
the oblong opening in the said fixing plate we fix by rivetting, or otherwise, a strip of
sheet metal the ends of which are cranked, that is, are raised into a higher plane
than the middle part. The said middle part is provided with a slot through which
the stem of the thumb piece is passed and works the said stem being engaged with
the tang of the bolt as usual. The corners of the thumb piece are cut away for
engaging under the two strips constituting the sides of the oblong opening in the
main portion of the fixing plate. The front face of the tang of the bolt is preferably
provided with a brass covering plate soldered thereto or attached thereto by the
rivetting of the stem of the thumb piece. The cylindrical part of the bolt
upon near its end by the ordinary spring.
acted
Instead of forming the box or sunken part of the strip for the thumb piece of the
bolt to work in, in the way described the box or sunken part in the fixing plate may
be formed by making two side piercings and one middle cross piercing, the two
divided parts formed by the cross piercing being hent down so as to form supports
for a slotted plate to be attached thereto by rivetting or otherwise. Or the box or
sunken part of the fixing plate may be formed by a longitudinal middle slit or
piercing the two divided parts being bent down and forming sides to the box like
recess for the thumb piece the box being completed by a slotted back plate.
In making slide bolts for the insides of cupboard and like doors of the kind
technically called "blind bolts' we make the bolt proper separate from the slide
carrying the same. The inner end of the said slide is turned up at right angles and
is provided with a hole for receiving the bolt proper which consists of a headed pin
the cylindrical body of which is near the head of a larger diameter than the main
part of the said body. The body of the headed pin is passed through the hole in the
cranked or turned up part of the slide from the back, the larger cylindrical part
occupying the said hole and the pin is secured to the slide by rivetting over the
larger part of the body of the pin projecting through the said hole.

page_text: Bolts made in the way described are much neater in appearance than bolts of the
ordinary construction.
Dated this 3rd day of February 1896
W. T. WHITEMAN,
Agent for the Applicants.
Improvements in Flush and other Bolts for Doors and other like.
purposes, and in the Manufacture of the same.
We, EVERED AND COMPY. LIMITED, of Barnet Works, Birmingham in the County
of Warwick, Manufacturers, and GEORGE CLARKE, Works Manager at Barnet Works,
Birmingham, aforesaid, do hereby declare the nature of the said invention and in what
manner the same is to be performed to be particularly described and ascertained
in and by the following statement :-
The said invention has reference to flush and other bolts for doors and other
like purposes made from sheet metal; and consists of the construction and
arrangement of parts hereinafter described of the said bolts and in the manufacture
of the same.
In making a flush bolt according to the said invention we take a strip of thin
sheet metal or alloy, preferably brass, and bend a portion near one end at right
angles to the main portion of the strip as usual and thereby form the fixing plate
of the holt. The said short bent part is provided with the hole for the acting end
of the bolt to work in and also with a countersunk hole for an attaching screw to
pass through. In the other or main part of the fixing plate at the part where the
box or sunken part for the thumb piece of the bolt to work in is to be formed, we
pierce an oblong opening and between the said opening and the end of the fixing
plate we make a second countersunk or screw hole. At the back of the fixing
plate described and opposite the oblong opening in the said fixing plate we fix by
rivetting or otherwise, a strip of sheet metal the ends of which are cranked, that is,
are raised into a higher plane than the middle part. The said middle part is provided
with a slot through which the stem of the thumb piece is passed and works the said
stem being engaged with the tang of the bolt as usual. The corners of the thumb
piece are cut away for engaging under the two strips constituting the sides of the
oblong opening in the main portion of the fixing plate. The front face of the tang
of the bolt is preferably provided with a brass covering plate soldered thereto or
attached thereto by the rivetting of the stem of the thumb piece. The cylindrical
part of the bolt is acted upon near its end by the ordinary spring.
Instead of forming the box or sunken part of. the strip for the thumb piece of
the bolt to work in, in the way described, the box or sunken part in the fixing
plate may be formed by making two side piercings and one middle cross piercing,
the two divided parts formed by the cross piercing being bent down so as to form
supports for a slottod plate to be attached thereto by rivetting or otherwise. Or the
box or sunken part of the fixing plate may be formed by a longitudinal middle slit or
piercing the two divided parts being bent down and forming sides to the box like
recess for the thumb piece, the box being completed by a slotted back plate.
In making slide bolts for the insides of cupboard and like doors of the kind
technically called "blind bolts" we make the bolt proper separate from the slide
carrying the same. The inner end of the said slide is turned up at right angles and
is provided with a hole for receiving the bolt proper which consists of a headed pin
the cylindrical body of which is near the head of a larger diameter than the main
part of the said body. The body of the headed pin is passed through the hole in the
cranked or turned up part of the slide from the back, the larger cylindrical part

page_text: occupying the said bole and the pin is secured to the slide by rivetting over the
larger part of the body of the pin projecting through the said hole.
Bolts made in the way described are much neater in appearance than bolts of the
ordinary construction.
Figures 1 and 2 of the accompanying drawings represent respectively in front and
side elevation a flush bolt constructed according to one of the arrangements constituting'
the said invention;
Figure 3 is a section of the said bolt taken on the line x, x Figure 1 and
Figures 4, 5 and 6 represent some of the blanks or parts of which the flush bolt
Figures 1, 2 and 3 is made.
In making the flush bolt Figures 1, 2 and 3 we form by stamping and piercing
from strips of thin sheet brass or other ductile metal or alloy, blanks of the kind,
represented in Figures 4, 5 and 6. The blank represented in back and side elevation
in Figure 4 and marked a, a constitutes the fixing plate of the flush bolt and the blank
Figure 6 constitutes the thumb piece of the bolt. The box of the flush bolt, that is,
the part for the thumb piece e to work in is formed by rivetting at the back of the
large rectangular opening h, the slotted box piece c, c, Figure 5, after the part e¹ of
the thumb piece e has been engaged in the slot d of the said box piece. In riveting
the box piece c to the fixing plate a the projections c³, on the said box piece are
passed through holes g, 9 in the fixing plate a and riveted over the front ends of the said
holes (as will be seen by reference to Figure 1) the cut away corners or notches fin
the part of the thumb piece engaging under the strips a' constituting the longer
sides of the oblong opening b, which strips a' form the guides for the thumb piece e
(as will be seen by reference to Figure 3). The stem of the thumb piece is passed
through a hole in the tang of the bolt h, h and is connected to the said tang by.
riveting. The part of the tang of the bolt which is exposed to view by the slot d
in the back plate c is preferably covered by a sheet of thin sheet brass i.
Figure 7. represents a flush bolt constructed according to another arrangement of
the said invention; Figure 8 represents the pierced blank from which the fixing plate
Figure 9, of the said bolt is made. The piercing of the blank Figure 8 leaves
projecting parts marked a³, a which when the blank is bent to form the fixing plate
are turned inwards at right angles the parts a, a on the said parts a, a receiving
the slotted back plate c represented detached in Figure 10. The thumb piece of the
flush bolt having been put in position the ends of the pins or parts a', a projecting
through the back plate care riveted over the holes therein and the said back plate is
thereby attached to the fixing plate.
Figure 11 represents a flush bolt constructed according to another arrangement of
the said invention and Figure 12 is a section of the same taken on the line y, y
Figure 11 Figure 13 represents the pierced blank fromed which the tixing
plate a, a (represented separately in Figure 14) is formed. The fixing plate
Figure 14 is made by bending inwards the side projecting parts a, a and also
bending at right angles the end a³ of the fixing plate as usual. The back plate c
Figure 15 is attached to the fixing plate and the box of a flush bolt thereby
formed by bending the ear or projecting pieces a, a of the parts a, a over the
ends, of the said back plate c as will be best understood by reference to the
section Figure 12. Or a back plate of the kind represented in Figure 16 having an
oblong piercing or rivet hole in each corner may be employed the ends of the ear
pieces a, a being riveted over the said holes as will be best understood by reference
to the section Figure 17.
Figures 19 and 20 represent respectively in back and side elevation a flush bolt
constructed according to another arrangement of the said invention, the bolt proper
being omitted in Figure 19; Figure 18 represents the stamped and pierced blank
from which the fixing plate and box for the thumb piece are formed. The upper part
is bent back at the dotted line z, z upon the other or longer part and is fixed thereto
by rivets 1, 1. The lower end a of the fixing plate is turned at right angles to the
longer part as usual. In all of the finished bolts described and represented we
employ an ordinary spring m for pressing on the lower end of the bolt h.

page_text: Figures 21 and 22 respresent in front and side elevation, the latter partly in section,
-a "blind" bolt constructed according to the said invention.
Figures 23, 24 and 25 represent respectively the bolt proper, the slide to which the
bolt proper is to be connected and the combined bolt and slide.
It will be seen by reference to Figures 23 and 25 that the headed pin constituting
the bolt proper has a collar n' at the junction of the head n with the stem or body of
the pin and the hole in the turned out end of the slide is made of a size proper to
receive the said collar n'. The pin n, n', nis fixed to the slide p by rivetting up or
expanding the part of the collar n¹ projecting through the hole in the slide p as will
be seen by reference to the finished bolt Figures 21 and 22.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that we claim
as the said invention of "Improvements in flush and other bolts for doors and other
like purposes and in the manufacture of the same!"
First. Forming the boxes or sunken parts of flush bolts by rivetting at the back
of a rectangular opening in the part constituting the fixing plate of the bolt, a slotted
plate substantially of the kind hereinbefore described and illustrated in Figures 1, 2, 3
and 5 of the accompanying drawings.
Secondly. Forming the boxes or sunken parts of flush bolts by providing the
fixing plate with turned back parts and pins for receiving a slotted back plate which
is riveted to, the said turned back parts substantially as hereinbefore described and
illustrated in Figures 7 to 17 both inclusive of the accompanying drawings.
Thirdly. Forming the boxes or sunken parts of flush bolts in one piece with the
part constituting the fixing. plate of the flush bolt substantially as hereinbefore
described and illustrated in Figures 18, 19 and 20 of the accompanying drawings.
Fourthly. Providing the thumb pieces of flush bolts with guides by forming the
said thumb pieces with notches or cut away corners for engaging and working
under the parts of the fixing plate constituting the sides of the rectuanglar opening at the
back of which the box or back-plate is rivetted substantially as herein before described
and illustrated in Figures 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 19 and 20 of the accompanying
drawings.
Fifthly The improvement in the construction of "blind" bolts herein before
described and illustrated in Figures 21, 22, 23, 24 and 25 of the accompanying
drawings the said improvement consisting in the method described and represented
of attaching the bolt proper to the slide, namely by employing a headed pin for
the bolt proper having a collar or enlargement immediately under the head which collar
when the pin is passed through the hole in the slide is riveted up or expanded
over the said hole in the slide substantially as described and illustrated.
Dated the Tenth day of October 1896.
W. T. WHITEMAN,
Agent for the Applicants.