Improvements in the Construction of Sash Fasteners.
Year: 1899

page_text: Improvements in the Construction of Sash Fasteners.
I, ARTHUR ILLIDGE, of Alexandra Foundry, Wolverhampton, in the County of
Stafford, Brass Founder, do hereby declare the nature of this invention to be as
follows:
A sash fastener, as ordinarily constructed, has the spring which bears against
the inner end of the arm riveted at one end to the back of the box to which the
arm is pivoted.
Now, this invention has for its objects to cheapen the manufacture of a sash
fastener and avoid any weakening of the spring by the formation of a rivet hole
therethrough; and these objects are accomplished, according to this invention,
by pressing inwards from the back of the box a tongue of metal which itself forms
the spring. This tongue of metal remains connected at its inner end with the
back of the box, but is free along its sides and outer end so that it may be sprung
back by the arm as the arm is turned.
A sash fastener formed, in the manner of this invention, with the spring formed
of the metal of the box, may be more cheaply produced than a sash fastener
having the spring formed separately from the box and riveted in place, and the
spring is not weakened by the formation of a hole therethrough; and there is
the additional advantage that the avoidance of a rivet head at the outer face of
the box enables a box of a given width to be used on a sash having a narrower
margin inside the glass than would otherwise be the case.
The box is, of course, made of metal, such as sheet steel or phosphor bronze,
bent to the desired form, which is adapted for the purpose of a spring, the tongue
being, of course, hardened or tempered when made of steel.
STEPHEN WATKINS,
Wolverhampton,
Agent for the Applicant.
Improvements in the Construction of Sash Fasteners.
I, ARTHUR ILLIDGE, of Alexandra Foundry, Wolverhampton, in the County of
Stafford, Brass Founder, 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:-
A sash fastener, as ordinarily constructed, has the spring which bears against
the inner end of the arm riveted at one end to the back of the box to which the
is nicated

page_text: Now, this invention has for its objects to cheapen the manufacture of a sash
fastener and avoid any weakening of the spring by the formation of a rivet hole
therethrough; and these objects are accomplished, according to this invention,
by pressing inwards from the portion of a blank which is to form the back of
the box a tongue of metal which itself forms the spring. This tongue of metal
remains connected at its inner end with the back the box, but is free along its
sides and outer end so that it may be sprung back by the arm as the arm is
turned,
The box is, of course, made of metal, such as sheet steel or phosphor bronze,
which may be bent to the desired form, and which is adapted for the purpose of
a spring, the tongue being, of course, hardened or tempered when made of steel.
In the drawings which serve to illustrate this invention:
Figure 1 is a plan view of a sheet metal blank which when bent to shape will
form the box for a sash fastener and shews the tongue to have been pressed out
"therefrom.
Figure 2 is a sectional plan of the sash fastener box, as the same appears before
the arm is put in place therein.
Figure 3 is a transverse section of the box taken on line xx of Figure 2.
Figure 4 is a sectional plan of the box, with the arm in its turned-back position
therein.
Figure 5 is a sectional plan of the box with the arm in its outward position.
Figure 6 is a plan of the box and arm, the latter being shewn in its turned-
back position; and
Figure 7 is a back elevation of the box.
a is the metal tongue to form the spring, which is first pressed out from the
blank A by cutting two parallel slits and a transverse slit joining their ends.
When the tongue has thus been formed, the box is bent to the trough-shape
indicated by Figure. 3. If made of steel as is preferred, it is then hardened by
heating and plunging in oil, so as to give the required elasticity to the spring a.
The arm B is then fastened within the box C by means of the vertical pin b,
and the inner end of this arm plays against the spring a in the manner in which
a sash fastener arm ordinarily plays against its spring.
The holes for the pin b, and for the screws which are used in fixing the box to
the sash, are formed before the blank is bent up to shape.
A sash fastener formed, in the manner of this invention, with the spring
formed of the metal of the box, may be more cheaply produced than a sash
fastener having the spring formed separately from the box and riveted in place.
and the spring is not weakened by the formation of a hole therethrough; and
there is the additional advantage that the avoidance of a rivet head at the outer
face of the box enables a box, of a given width, to be used on a sash having a
narrower margin inside the glass than would otherwise be the case.
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: :-
1. In a sash fastener, the spring, against which the inner end of the arms
plays, formed as a tongue of metal which is integral with the metal of one end
of the back of the box, substantially as set forth.
2. In a sash fastener, the spring, against which the inner end of the arm plays,
consisting of a tongue of metal which is integral with the metal of the box,
substantially as set forth.
STEPHEN WATKINS,
Wolverhampton,
Agent for the Applicant.