An Improved Window Sash Fastener.
Year: 1897

page_text: Date of Application, 28th Jan., 1897-Accepted, 6th Mar.,
1897
An Improved Window Sash Fastener.
I, JOHN WILLIAM MCDOUGALL, of Napier, in the Colony of New Zealand,
Journalist, 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 has reference to fasteners for window sashes, and has for its object
to provide a fastener of neat design which shall effectually secure the sashes, resist
the entrance of burglars, and prevent the sashes from rattling when the wind is
blowing, or when shaken by passing vehicles or otherwise.
Devices in many forms have been introduced to effect the object of this
invention, but on account their parts being complicated or expensive, or
ineffectually fulfilling their duty, such devices have not come into general use.
This invention overcomes such objections, is easily operated and readily fixed in
position.
The object of the invention is carried into effect by fixing upon the meeting
rail of the inner sash, a bracket having two bearings wherein fits a bolt which may
be shot into and retained by a spring within a bracket fixed upon the meeting
rail of the outer sash. A pin secured radially in the bolt passes beneath a
catch upon the last mentioned bracket and is held up against the inner face of
the said bracket by the spring, thus preventing the turning of the bolt and
unfastening the same from the outside whilst drawing the sashes together to
prevent rattling.
In order that the invention may be most easily understood a description
will now be given in detail, reference being had to the accompanying drawings
whereon:-
Figure 1 is a side view of the fastener fixed upon the rails and ready for
fastening.
Figure 2 is a similar view of the same when fastened.
Figure 3 is a plan of the same unfastened.
Figure 4 is a plan of the same fastened.
Figure 5 is an end view shewing the pin caught by the bracket.
Figure 6 is a section on line A-B, Figure 3.
Upon these drawings, the bracket (a) is fixed upon the meeting rail (b) of the
inner sash and has bearings (a 1) and (a 2) for carrying bolt (c). A spiral spring (d)
is threaded upon bolt (c) and operates against bearings (a 1) and shoulder (c 1) of
bolt (c) with a tendency to keep the bolt in the position shewn on Figure 1. In
such position the projecting point (a 1) of spring (d) catches against bearing (a 2)
and is thus rendered inoperative in further forcing back the bolt. A pin (c2) is
secured to or made solid with bolt (c).
The bracket (f) is fixed upon the meeting rail of the outer sash (g) and is
made to engage bolt (c) in its hole (fl). The catch or hook (2) prevents
pin (c2) from being returned to an upright position unless the same is pushed
forward clear of the said catch.
Slots (a 3) and (a 4) are made in brackets (a 1) and (a 2) respectively to permit
bolt (c) being introduced into or withdrawn from the bearings (a 1) and (a 2)
respectively. The bolt is placed in position by passing its end with pin (c2)
through the hole and slot (a 4) in bearings (a 2), the large diameter of the hole

page_text: allowing the said end of the bolt to be elevated so that the spring (d) may be placed
thereon by threading it upon the bolt and pin (c2), the bolt passing up the internal
diameter and the pin through the spaces between the coils. The bolt is then pulled
back against the resistance of the spring until its end will pass into bearings (a 1),
and pin (c2) through slot (a 3).
To close the fastener, the bolt with pin (c2) in a vertical position is pushed
forward until it enters bracket (f), and pin (c2) is beyond catch (f 2), when
the bolt is turned until pin (c2) about horizontal and will pass beneath the
catch when the bolt is released and allowed to recede under the action of
spring (d).
From this description it will be seen that when the sashes are closed they
are held together by spring (d) operating against shoulder (d1) and bearing (a1)
to pull pin (c2) in bolt (c) against bracket (f), resulting in a tendency to bring
brackets (a) and (f) together, that is to hold the sashes (b) and (g) together.
I wish it to be understood that I do not confine myself to the exact details herein-
before described as these may be modified in several ways without departing from
the spirit of the invention.
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 :-
1. A window sash fastener consisting of a bolt sliding in a bracket fixed to one
sash and having a pin to engage with a catch upon a bracket in the other sash and
holding the sashes together by a spring, substantially as and for the purposes set
forth herein.
2. A window sash fastener constructed, arranged, and operating substantially
as and for the purposes set forth herein and illustrated in the accompanying
drawings..
Dated this 17th day of December 1806
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.