An Improved Self-locking Sashfastener.
Year: 1891

page_text: Date of Application, 24th July, 1891
Complete Specification Left, 8th Aug., 1891-Accepted, 12th Sept., 1891
PROVISIONAL SPECIFICATION.
An Improved Self-locking Sashfastener.
I, LAWRENCE EADSON MANNINGS of 46 London Street, Reading, in the County
of Berks, Hairdresser do hereby declare the nature of this invention to be as
follows:-
In this improved sashfastener the usual horizontal spring, behind the working
arm, is extended, and has an enlarged end, forming a thumb-bit, by means of which
the fastener is unlocked.
The horizontal arm has a somewhat enlarged end or heel piece, beyond the pivot
on which it turns. This heel piece carries a projecting lug and also a small pin
which when the arm is placed in the locked position, at right angles to the spring,
engage with holes cut in the spring and thus lock the fastener. To release it the
thumb-bit at the end of the spring must be pressed back to disengage the lug and
pin, and the arm can then be turned and the sashfastener opened.
The projecting pin is rounded so as to pass over the spring more easily, and the
backplate of the fastener is also enlarged at the end near the thumb-bit on the
spring, so as to afford a suitable purchase for the operation of pressing back
the spring.
Dand the auth
T11001
COMPLETE SPECIFICATION.
An Improved Self-locking Sashfastener.
I, LAWRENCE EADSON MANNINGS of 46 London Street, Reading in the County
of Berks, Hairdresser, 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 is designed to supply a simple and inexpensive form of self-locking
sashfastener, which in appearance and construction will differ very little from the
sashfastener in ordinary use.
In this improved sashfastener the usual horizontal spring is made rather larger,
that is to say longer and wider, and has perforations or apertures corresponding
with projections at the back of the pivotted arm.
It therefore locks itself automatically in the position which fastens the sash, and
before it can be opened the spring must be pressed back so as to disengage the
projections on the arm. As this back pressure cannot be applied to the spring from
outside the sash it is obvious that the fastener is secure from any attempt to open
it burglariously by means of a blade inserted between the sashes as is often done
with the common fastener.
I will now describe the invention with reference to the accompanying drawings
in which
Fig. 1 shews a plan view of the fastener and catch m, with the arm a, in the
locked position and the horizontal cover plate removed.
Fig. 2 shews an elevation of the backplate.
Fig. 3 shews an elevation of the spring s, with the apertures f, and
g-
Fig. 4 shews a plan of the arm a, detached so that the lug d, and locking pin e,
are in view.
It will be observed that the horizontal arm a, has an enlarged end or heel piece b,
beyond the pivot c, on which it turns.

page_text: This heel piece carries a projecting lug d, and also a small pin e, the latter of
which when the arm a, is placed in the locked position at right angles to the
springs, engages with the aperture g, in the spring and thus locks the fastener.
The lug d, also passes through the spring at f, and rests on the projecting
stop p, attached to the backplate h.
In order to open the fastener it is necessary to first press back the springs,
towards the vertical backplate h. With a view to facilitate this operation the free
end of the spring at t, is enlarged so as to form a thumb-bit, and the backplate h, is
also enlarged at i, so as to afford a suitable purchase for the forefinger.
The mode of action is as follows :-
The arm a, being drawn forward in the usual way by means of the knob k, till it
passes under the catch m, the lug d, passes through the hole or slot f, while the pin e,
engages with the hole
9.
The fastener is now locked by the pin and cannot be unfastened until the spring s,
is pressed back towards h.
This being done the arm a, can be turned on its pivot in the usual way and the
fastener opened. The pin e, is rounded off on one side, to enable it the better to
slide over the spring when the fastener is being locked.
said
Having now particularly described and ascertained the nature of my
invention and in what manner the same is to be performed I declare that what I
claim is :-
1. In a self-locking sash fastener the enlarged springs, the enlarged backplate h,
the stop p, the lug d, the pin e, and the corresponding holes or slots f, g, as herein
explained and set forth.
2. In a self-locking sash fastener, the general arrangement and combination of
parts as herein explained and set forth.
Dated this 7th devor
S. S. BROMHEAD.
97, Newgate Street, London, E.C., Patent Agent.