Improvements in Window Sash Fasteners.
Year: 1891

page_text: Date of Application, 26th May, 1891-Accepted, 4th July, 1891
COMPLETE SPECIFICATION.
Improvements in Window Sash Fasteners.
We JAMES DUNBAR and JonaS NICHOLS both of 58 Cranbury Avenue
Southampton, Hampshire, Gentlemen 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 relates to improvements in window sash fasteners and has for its
object to provide a simple and inexpensive locking device which will be burglar
proof and easy to manipulate.
In the accompanying drawings
Fig. 1 is a vertical section of the meeting rails of the two window sashes locked
by means of my improved device the bolt of which is shown in elevation.
Fig. 2. is a front view of a portion of the meeting rail of the lower sash showing
the device applied thereto, with the bolt in cross section.
My improved device consists of two metal parts, a plate a furnished with a
hollow extension band two perforations by means of which the said plate is
screwed in the front part of the meeting rail R of the upper or rear sash (Fig. 2)
a recess being formed in this rail to receive the extension b.
The second part or locking device proper is located in a recess formed in the
meeting rail of the lower sash and consists of a bolt c furnished at the rear with a
tapered enlargement d which is designed to enter the hollow part of the extension b
and in front with a knob e. This bolt c works through a circular opening f of a
plate which is provided with a central circular extension h formed at the back
thereof, and slotted on each side as shown.
g
The opening has two lateral rectangular slots i corresponding to the slots of
the extension, the pinj fixed to the bolt c being capable of passing freely through
all these slots when the said bolt is drawn for the purpose of locking or unlocking
the sashes. A spiral spring is coiled upon the bolt one end resting against the
front of the enlargement d and the other against the rear end of the extension .
Fig. 1 shows in full lines the device in its locked position and in dotted lines the
same in its unlocked position. To unlock the sashes the knob e is pulled out
against the pressure of the spring k until the pin j has issued from either of the
slots i, when by giving a slight turn to the said knob the pin ; will come to bear
upon the metal of the plate g, thus securing the device in an open position, as
shewn in Fig. 2. and releasing the sashes.
The latter are locked again by turning the knob e round until the pin j is able
to pass through one of the slots i and the corresponding slot of the extension h,
when the pressure of the spring will cause the end d of the bolt to be shot into
the extension b.
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. The improved window sash fastener arranged, constructed and operating
substantially as herein described and shown and for the purpose set forth.
1. 222 .
1001
RAYNER & CASSELL,
37, Chancery Lane, London, W.C., Agents for the Applicants.