Improvements in the Manufacture of Flush Bolts for Doors and the like.
Year: 1889

page_text: Date of Application, 10th Apr., 1889
Complete Specification Left, 18th Dec., 1889-Accepted, 1st Feb., 1890
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Flush Bolts for Doors and
the like.
I CHARLES SHOWELL of the firm of Edwin Showell and Sons of Lower Loveday
Street, Birmingham in the county of Warwick Brassfounders, do hereby declare the
nature of this invention to be as follows:-
""
This invention relates to improvements in the manufacture of what are known as
flush bolts, for cupboard or other doors or other similar purposes, and consists in
making the frame or body of such bolts from a flat strip of metal, having a flat "set
in or recess either having a clear open way transversely, or, such recess may be of
a set in box shape, having sides thereto; for a given length wherein the lift piece may
slide, and wherein it may permit of free access for manipulation, such recess portion
also being hollow sprung before attachment of bolt to afford frictional pressure upon
the bolt to retain it in its upward or downward position, and further to eyelet the
guide hole in the said frame or body, through which the said bolt works &c.
In making these bolts, we proceed somewhat as follows:-
We take a parallel narrow strip of metal of a suitable width and length, and pierce
therethrough near one end, a screwhole and such other screw holes as may be
desired.
Also we pierce near the said screw hole a second hole, through which the nose or
end of the holt may work. In piercing this hole, however, we use a punch that will
pierce a smaller hole than the bolt itself, but which will further puncture or enlarge
the hole to the required size, and in so doing throw up the metal around the sides of
the hole, eyeletwise. Or if preferred, we may clean cut the said hole, and insert a
separate eyelet. In either case the object being to increase the wearing surface in
the said hole.
A further perforation or slot is made at a suitable part, through which the lift
piece passes from the front, to the bolt.
The front end of the strip is now bent at right angles to the main body, allowing
the bolt hole at a proper distance from the front surface.
Next, we set back the strip for a portion of its length, about the aforesaid slot,
which set back portion lies parallel to the main part of the body, so that sideways,
such recess is quite open. In some cases however, we further provide walls or sides
to this recess, either by slitting the metal at the set back part, for a short distance, so
that such parts may be then turned up by press tools each side, and its corners
soldered or otherwise, or, the original strip may be cut out having extended portions
along its sides at this part, which said extended portions may be turned up, forming
the sides of the recess as before described. This set back portion is further slightly
convex (front view).
The bolt is made in the ordinary manner, and practically of the ordinary shape,
and is now attached to the frame, by reason of the lift piece being passed through the
slot and rivetted or screwed thereto. In fastening this lift piece to the said bolt,
however, it draws inwards the convex form of the recess, which, by reason of its
being somewhat springy in its nature, clips the said bolt thereto, with sufficient force
to dispense with the spring as ordinarily used.
Although we have described a method for dispensing with the ordinary frictional
spring upon the bolt, yet we may in some cases use the ordinary bolt and spring with
our improved bolt frame.

page_text: The whole is now ready for use, affording unfettered access to the lift piece,
security against involuntary falling of the bolt, and ample wearing surface in its
wearing part, while it may be made from light metal, with a neat finish and
appearance.
Dated this 9th day of April 1889.
CHARLES T. POWELL,
Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Flush Bolts for Doors and the
like.
I, CHARLES SHOWELL, of the firm of Edwin Showell and Sons, of Lower Loveday
Street, Birmingham, in the county of Warwick, Brassfounders, 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 improvements in the manufacture of what are known as
flush bolts, for cupboard or other doors, or other similar purposes, and consists in
making the frame or body of such bolts from a flat strip of metal, having a flat
" set in " or recess, either having a clear open way transversely, or, such recess may be
of a set in box shape, having sides thereto, for a given length, wherein the lift piece
may slide, and wherein it may permit of free access for manipulation, such recess
portion also being hollow sprung before attachment of bolt, to afford frictional pressure
upon the bolt to retain it in its upward or downward position.
In order to explain more clearly how this my invention is to be performed, 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, shews a side view; Fig. 2, is a front view, and Fig. 3, is a side sectional
view of this my invention.
Fig. 4, is a detail view of the strip from which the frame or plate is formed.
Figs. 5, & 6, are detail views of the bolt.
Figs. 7 & 8, are views of the spring plate, and Fig. 9, a detail plan of the finger
lift piece.
Fig. 10, is a view of the plate from which the frame is made, having sides to
the recess.
Fig. 11, is a side view, and Fig. 12, a front view of the frame having these
said sides to the recess.
In making these bolts, I proceed somewhat as follows:-
I take a parallel narrow strip a, of metal, of a suitable width and length, and pierce
therethrough such screw holes 6, 6, as may be desired.
Also I pierce near the said screw hole b₁, a second hole c, through which the nose or
end of the bolt d, may work. A further perforation or slot e, is made at a suitable
part, through which the lift piece f, passes from the front, to the bolt d.
The front end of the strip is now bent at g, at right angles to the main body,
allowing the bolt hole c, at a proper distance from the front surface.
Next, I set back the strip for a portion h, to i, of its length, about the aforesaid
slot e, which set back portion lies parallel to the main part of the body a, so that
sideways, such recess is quite open.
In some cases however, I further provide walls or sides to this recess, see
Figs. 10, 11, & 12, by cutting out the strip a, with extended portions j, along
its sides at this part, which said extended portions may be turned up, forming the
sides of the recess as before described.

page_text: The bolt d, is made in the ordinary manner, and practically of the ordinary
shape, and is now attached to the frame a, by reason of the lift piece f, being
passed through the slot e, and rivetted or screwed thereto. In fastening this lift piece
to the said bolt, 1 provide a plate k, of the same metal as the plate a, having a hole 7,
through which the lift piece f, also passes, and hides the commoner metal of the bolt,
from view through the slot hole e. This piece k, is further made of springy
metal and slightly bent, as seen in Fig. 8. By placing this piece k, between the
bolt and the frame a, and rivetting the lift piece f, upon the rear side of the bolt d,
the said piece k, produces sufficient friction upon the sliding of the bolt to prevent its
involuntary dropping.
Although I have described a method for dispensing with the ordinary frictional
spring upon the bolt, yet 1 may in some cases use the ordinary bolt and spring
with my improved bolt frame a.
The whole is now ready for use, affording unfettered access to the lift piece,
security against involuntary falling of the bolt, and ample wearing surface in its
wearing part, while it may be made from light metal, with a neat finish and
appearance.
Having now particularly described and ascertained the nature of my said Inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
°
1st. In flush bolts for doors and other similar purposes, the making of the frame or
body from a flat strip of metal, substantially in the manner described and illustrated
upon the drawings in reference to Figs. 1, 2, 3, & 4.
2nd. The making of the frame or body of such bolts by means of the modified form
of flat strip of metal, substantially in the manner described and illustrated upon the
drawings in reference to Figs. 10, 11, & 12.
3rd. The general combination and arrangement of parts constituting this my
improved flush bolt as described and illustrated in Figs. 1, to 9, inclusive, and
also of parts constituting the modification as described and illustrated in Figs. 5
to 12 inclusive.
Dated this 17th day of December 1880
CHARLES T. POWELL,
12. Cherry Street, Birmingham, Applicant's Agent.