A New or Improved Device for Fastening or Securing Windows, also Applicable for other Purposes.
Year: 1897

page_text: Date of Application, 29th May, 1897-Accepted; 3rd July, 1897
A New or Improved Device for Fastening or Securing Windows,
also Applicable for other Purposes.
I, THOMAS ROBERT BLACKMORE, of 74, Bradgate Road, Catford, London, S.E.,
Gentleman, do hereby declaro the nature of this invention and in what mannor the
same is to be performed, to be particularly described and ascertained in and by
the following statement :-
My invention relates to a new or improved device more particularly intended for
fastening or securing windows, but which is also applicable for use in connection
with doors, or the like, that may require to be securely fastened, the object being
to provide a neat and strong fastening device of simple construction that auto-
matically looks the window, door or the like, upon being slightly turned or pressed
round by the fingers, said dovice being moreover of few and simple parts and not
liable to get out of order, while the actuating spring can be readily replaced when
required and the whole will be found far more durable and efficient than the
ordinary window fastener of well known construction.
In order that my invention may be fully understood, I will now proceed to describe
same with reference to the accompanying drawing in which Fig. 1 is a plan of my
improved fastening device in the looked position, Fig. 2 being an elevation of same
with the case or outer parts of the device in section, and showing it in the locked
position. Fig. 3 is a similar view to Fig. 2 but with the bolt shown in the unlocked
position.
Like letters of reference indicate corresponding parts throughout the views.
According to my invention I provide a suitable base plate b upon which I mount
a oylindrical sleeve c retained in position by means of a metal strap or top plate 8
secured in position by screws a, and in such a manner as to be readily removed
when required.
Within the inner sleeve c is arranged a bolt B having behind it a sufficiently
powerful spiral spring d, the bolt B being furnished with a projecting stem f
passing through a slot g in the inner sleeve c and through a corresponding slot or
opening gl formed in the strap or top plate 8, said slot being extended to one side
and slightly curved as shown at g2 to accommodate the stein f when in the unlocked
position, said stem carrying a knob for operating the bolt or fastening.
The receiver portion of my device comprises a base plate b1 furnished with a
cylindrical sleeve ol and retained in position by a strap or top plate 81 secured by
means of screws as shown, the sleeve ol being designed to receive and accommodate
the end of the bolt B when in the locked or closed position.
The operation or action of my improved fastening device is as follows:-
The bolt B being in the open or unlocked position as shown in Fig. 3 with
the stem flying within the curved extension g' of the alot gl, it is only necessary to
press over the knob h until the stem f is clear of the curved extension g' when the
bolt is automatically shot forward by the action of the coiled spring d, the end of
the bolt engaging with the sleeve cl as shown.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to bo performed, I declare that what I
claim is :-
:-
1. The new or improved fastening device for windows, doors, and the like,
comprising a bolt B actuated by a spiral spring d, in combination with a suitable
cylindrical sleeve or case such as c and having formed therein and in the securing
strap or top plate 8 a horizontal slot with a curved extension such as g²; and a
receiver portion comprising a cylindrical sleeve or case such as cl, secured in position
by a strap or top plato 81, the whole combined and arranged substantially as herein
described and shown, and for the purposes specified.
2. In a fastening or securing device for windows, doors and the like, such as
above claimed, the curved extension g' of the slot g¹, substantially as herein described
and shown, and for the purposes specified.
3. The new or improved device for fastening or securing windows, doors, and the
like, substantially as herein described and shown, and for the purposes specified.
Dated this 21st day of Alny, 1897.
F. G. CASSELL
(Of Cassell & Co.),
22, Glasshouse Street, Regent Street, London, W.,
Agents for the Applicant.