Improvements in Window Sash Fasteners.
Year: 1891

page_text: Date of Application, 13th Feb., 1891
Complete Specification Left, 4th Nov., 1891-Accepted, 5th Dec., 1891
PROVISIONAL SPECIFICATION.
Improvements in Window Sash Fasteners.
I ALFRED CLARK HOWELL, No. 4 Sandown Grove, Lozells Road, Aston, in the
County of Warwick, Brassfounder do hereby declare the nature of this invention
to be as follows:-
I use the ordinary sash fastener with the usual parts known as box leg circle
spring and rivet, but my invention consists of a modification in the end of the leg
through which the pin or axis passes, and which part of the leg I will call the
joint. Instead of drilling, or by other means making the usual round hole in the
part of the leg which forms the said joint, I make the joint end of said leg, with a
hole in it which is elongated in the direction transverse to the length of said leg.
By this device the leg of my fastener, when extended across the window sashes,
may be moved in a lateral direction without turning on its axis, thus increasing the
distance from the pin or pivot to the projecting part of the said leg, which forces
down the spring. It will now be seen that on working the fastener, when the pin
or pivot is at the end of the elongated hole nearest the projecting part, the said
projecting part will pass the spring, and the leg turn on the pin or pivot, but when
the pin or pivot is at the end of the hole furthest from the said projecting part, the
spring becomes forced against the back of the box, and the leg prevented from
turning on the pin or pivot.
Dated this 12th day of February 1891.
CHARLES T. POWELL,
Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in Window Sash Fasteners.
I ALFRED CLARK HOWELL, of Sandown Grove Lozells Road, Aston,
Warwickshire, Brassfounder, 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 consists as follows:-I use the ordinary sash fastener with the
usual parts known as box leg, circle, spring, and rivet, but my invention consists of
a modification in the end of the leg, through which the pin or axis passes, and
which part of the leg 1 will call the joint. Instead of drilling, or by other means
making the usual round hole in the part of the leg which forms the said joint, I
make the joint end of the said leg, with a hole in it, which is elongated in the
direction transverse to the length of said leg. By this device, the leg of my
fastener, when extended across the window sashes, may be moved in a lateral
direction without turning on its axis, thus increasing the distance from the pin or
pivot to the projecting part of the said leg, which when turned round forces down
the spring.
.
It will now be seen that on working the fastener, when the pin or pivot is at the
end of the elongated hole nearest the projecting part, the said projecting part will
pass the spring, and the leg turn on the pin or pivot, and act as an ordinary sash
fastener, but when the pin or pivot is at the end of the hole furthest from the said
projecting part, the spring becomes forced against the back of the box, and the leg
prevented from turning on the pin or pivot.
In order to more fully explain this my invention I have appended hereunto an

page_text: 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 :
Fig. 1, is a plan view of this my invention in its complete form.
Fig. 2, is a side view in elevation of this my invention showing its relation to the
sashes, the latter being shown in section.
Fig. 3, is a part plan with the top plate removed, showing the elongated joint
hole, as when in ordinary use.
Fig. 4, is a part plan with the top plate removed, showing the leg turned round
or unfastened.
Fig. 5, shows the leg as it would appear when tampered with, and thus locked.
Fig. 6, shows how that the leg cannot be turned or unlocked when it has been
so tampered with.
A, is the frame of that part of the fastening which is secured to the lowering
sash B, and which carries the spring C, leg D, and joint pin E. F, is the plate of
the counterpart of the fastening, which is secured to the raising sash G, and which
carries the circle, or cam shaped piece H. This plate F, and piece H, are similar
to those at present in use, both in their form and use; that is, when the sashes are
fastened as
seen in Fig. 1, the projection I upon the leg D, rides along the
surface J, and draws the sashes together. The spring C, is also similar to those at
present in use..
In the leg D, however instead of the ordinary round hole to receive the joint
pin E, I provide the elongated or slotted hole K. This hole lies, as shown, in the
direction at right angles to the length of the leg.
Its action will now be understood to be as follows:-
:-
In ordinary use the leg would be pushed to the left as seen in Figs. 1, 3 & 4,
that is, the joint pin E, would occupy the right hand end of the slot K. The
short distance from the pin E, to the point or projection L, when in this position,
enables the free turning, or locking or unlocking of the leg. Should any attempt
be made from the outside to force the fastening (by the well known method of a
knife or similar article being passed up between the sashes, and forced in the
direction shown by the arrow), the leg is moved forward into the position shown in
Fig. 5. Thus the leverage from the pin to the point L, is increased, making it
much more difficult to turn the leg; but in addition to this, even if sufficient force
be applied, the leg could only be turned practically as far as seen in Fig. 6, by
reason of the spring coming in contact with the back M, of the plate. In order to
still further ensure the impossibility of turning the leg beyond the distance shown
in Fig. 6, in cases where a weak spring C, is used, I may provide a stop N, upon
the plate M, so that the spring when pressed backward shall rest thereagainst.
This however in practice I find to be generally unnecessary..
Having now particularly described and ascertained the nature of this my said
invention, and in what manner the same is to be performed, I declare that what
I claim is
The combination in a sash fastening with the plate F, piece H, plate A,
spring C, and pin E, or their equivalents, of the leg D, having the elongated
hole K, substantially as set forth and shown and for the purposes specified.
Dated this 3rd day of November 1891.
CHARLES T. POWELL,
12, Cherry Street, Birmingham, Applicant's Agent.