Improvements in Sash Fasteners.
Year: 1897

page_text: Date of Application, 17th Aug., 1887
Complete Specification Left, 13th May, 1898-Accepted, 16th July, 1898
DI MULTIVALIUN.
Improvements in Sash Fasteners.
I, WILLIAM EDWARD ISON, of 49, High Street, Bedford, in the County of
Bedford, Jeweller, do hereby declare the nature of this invention to be as
follows:-
The object of this invention is to provide a fastener for double hung windows,
which when in use, will draw and hold the two sashes closely together so as to
exclude draughts, stop rattling and prevent the throwing back of the fastening
catch from the outside by forcing an instrument between the sashes.
The fastener comprises a bed plate in two portions, one to be screwed or
otherwise secured on each sash in the usual positions. One portion of the bed
plate is provided with a stop or pin with an enlarged head; the other portion
of the bed plate has pivotted on to it a flat plate, containing a cam slot, so
arranged that on rotating the plate and bringing part of it over the other portion
of the bed plate, the body of the stop or pin will enter the slot, although the
sashes be not in close juxtaposition.
On engaging the stop further within the slot the two sashes are drawn closely
together.
The head of the pin overlaps the edges of the slot so as to engage with the
plate and prevent raising or lowering of the sashes.
The pivotted plate is provided with a short arm, carrying a knob for use in
rotating the plate, or the knob may be placed on part of the plate itself.
Instead of a plate a three armed lever may be employed one short arm carry-
ing the pivot, another short arm the knob, the third, and longest arm, being
curved so that its inner edge may act as a cam and engage the stop body.
A small stop may be placed in the portion of the bed plate carrying the cam
plate or lever, so as to prevent the plate being over rotated when the fastening
is disengaged.
Dated this 17th day of August 1897
BOULT & WADE,
Agents for the Applicant.
I, WILLIAM EDWARD ISON, of 49, High Street, Bedford, in the County of
Bedford, Jeweller, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
35 in and by the following statement:―
The object of this invention is to provide a fastener for double hung windows.

page_text: which when in use, will draw and hold the two sashes closely together so as to
exclude draughts, stop rattling, and prevent the throwing back of the fastening
catch from the outside by forcing an instrument between the sashes.
The fastener comprises a bed plate in two portions, one to be screwed or
otherwise secured on each sash in the, usual positions. One portion of the bed
plate is provided with a stop or pin with an enlarged head; the other portion
of the bed plate has pivotted on to it a flat plate, containing a cam slot, so
arranged that on rotating the plate and bringing part of it over the other portion
of the bed plate, the body of the stop or pin will enter the slot, although the
sashes be not in close juxtaposition.
On engaging the stop further within the slot the two sashes are drawn closely
together.
The head of the pin overlaps the edges of the slot so as to engage with the
plate and prevent raising or lowering of the sashes.
The pivotted plate is provided with a short arm, carrying a knob for use in
rotating the plate, or the knob may be placed on part of the plate itself.
Instead of a plate a three armed lever may be employed one short arm carry-
ing the pivot, another short arm the knob, the third, and longest arm, being
curved so that its inner edge may act as a cam and engage the stop body.
A small stop may be placed in the portion of the bed plate carrying the cam
plate or lever, so as to prevent the plate being over rotated when the fastening
is_disengaged.
In the accompanying drawings which illustrate one construction of such
fastener according to this invention:-
Fig. 1 is a plan showing the two portions of the fastener in engagement,
Fig. 2 is a similar view showing the two portions of the fastener when dis-
engaged.
Fig. 3 is a side elevation looking in the direction of the arrow in Fig. 1.
Like letters indicate like parts throughout the drawings.
A and A¹ are plates of metal, forming when in juxtaposition, as in Fig. 1, a
circular bedplate in two portions upon which the various parts of the sash
fastener are mounted. The plates A and A¹ are secured by screws B to portions
of sashes C, C¹ respectively. Upon the plate A a pin D is fixed having an en-
larged head D¹. E is an arm or lever, pivotally mounted on the plate A¹ as at El
and having its edge E2 in the form of a cam. It is provided with a projection E³
preferably formed from the same piece of metal by means of which it may be
held and rotated about its pivot E¹.
F is a stop to prevent the lever E from moving too far back when being dis-
engaged.
When it is desired to fasten the sashes the lever E is rotated and engages with
the pin D, passing under the head D¹. As the lever E is further rotated its
cam-shaped edge operates upon the pin D and draws the sashes C C closely
together as shown in Fig. 1.
When the fastener is in engagement as in Fig. 1 it is impossible to disengage
it by means of a knife or other instrument inserted between the sashes, a defect
which constitutes a serious disadvantage in many forms of sash-fasteners as
hitherto constructed.
Having now particularly described and ascertained the nature of the said
invention and in what manner he same is to be performed, I declare that what
I claim is:-
1. A sash-fastener having a pivotted cam which locks the sashes and also draws
them together.
2. A sash-fastener having a pivotted lever such as E with a cam-edge E2 which
engages with a pin, substantially as and for the purpose described.
3. In a sash-fastener a flat pivotted cam-lever such as E, E2, E3 substantially
as described and illustrated in the accompanying drawings.

page_text: 4. The complete sash-fastener substantially
accompanying drawings.
as described or illustrated in the
Dated this 12th day of May 1890.
W. E. ISON.
Boult & Wade,
Agents for the Applicant.
W. E. ISON.
Boult & Wade,
Agents for the Applicant.