An Improved Sash Fastener.
Year: 1891

page_text: Date of Application, 19th Oct., 1891
Complete Specification Left, 5th Jan., 1892-Accepted, 6th Feb., 1892
PROVISIONAL SPECIFICATION.
An Improved Sash Fastener.
ARTHUR JAMES EMERY Hill View Wrottesley Road Plumstead S.E. Surveyor.
I do hereby declare the nature of this invention to be as follows:-
A metal sash fastener, having a tooth on a straight or hinged quadrant arm,
which when the window is fastened, fits into another tooth on the guide, which is
pivoted to the inside plate, with a small spring or india rubber cushion behind it to
keep it in contact with the first named tooth.
Dated thin 10th
1001
A. J. EMERY.
COMPLETE SPECIFICATION.
An Improved Sash Fastener.
ARTHUR JAMES EMERY Hill View Wrottesley Road Plumstead S.E. Surveyor,
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:
My invention has for its object an improvement in window fasteners for sliding
sashes, whereby the sash fastener is made secure, from being opened from the out-
side, without interfering with the ease with which the ordinary sash fastener is
opened from the inside.
The improvement consists essentially of the addition to an ordinary sash fastener
of a pivoted toothed locking piece, described in the Provisional Specification as the
'guide" but hereinafter described as the "pivoted lever," which has a notch or
tooth, which fits against a notch in the pivoted arm, described in the Provisional
Specification as the "quadrant arm.'
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The pivoted lever is attached by means of a screw, which forms the pivot, to the
inner plate, which is fastened to the lower sash, this pivoted lever is kept in its
locking position by means of a spring.
I will now proceed to describe the fastener in connection with the drawings.
Figs. 1 & 3 are plans of sash fasteners of different descriptions with my improve-
ment attached.
Figs. 2 & 4 are side elevations of the same when in the fastened position.
Fig. 5 is a plan of the pivoted lever.
Figs. 6 & 7 are plan and elevation respectively of a portion of pivoted arm,
showing tooth.
To the inside plate A, I attach the pivoted lever B by means of the screw bl
forming the pivot, this lever is kept forward by means of the spring 62; when the
pivoted arm C which is notched out underneath, thereby forming the tooth c', is
moved forward, it presses back the pivoted lever B until ¹ passes the tooth /*, when
the pivoted lever B springs forward & prevents the return of the arm C. To
facilitate the release of the arm C from the inside, the end of the pivoted lever B
is brought round to touch the knob on the arm C, so that the thumb, when
pressing on the left side of the knob c³, in order to force back the pivoted arm C,
presses also the end 6 of the pivoted lever B, thus releasing the tooth c¹.
I may cause the pivoted arm C to pass under the fixed quadrant D as in Figs. 1—
2-6 & 7 or over it as in Figs. 3 & 4.
The fastener may be made of brass or any other suitable material.

page_text: The spring E at the back of the fastener, usually termed the box spring, may be
dispensed with, or replaced by a cupped spring surrounding the pivot F, underneath
the arm C, to keep the latter from swinging loosely, if so desired.
Having now particularly described & 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 :-
1. The improvement in window fasteners, consisting of the pivoted.lever B, the
plan of which is shewn (Fig. 5) in the accompanying sheet of drawings, mounted to.
act substantially as hereinbefore described, and as shewn.
2. The improvement in sash fasteners, substantially as hereinbefore described &
as shewn in the accompanying drawings.