Improvements in Door and other Fastenings.
Year: 1890

page_text: Date of Application, 20th Nov., 1890
Complete Specification Left, 19th Sept., 1891-Accepted, 24th Oct., 1891
PROVISIONAL SPECIFICATION.
Improvements in Door and other Fastenings.
1, WILLIAM GEORGE FORSTER, of Lonesome Chemical Works, Streatham
Common, in the County of Surrey, Chemist, do hereby declare the nature of this
invention to be as follows:-
This invention relates to that class of. fastening in which there is a bolt having a
handle projecting at right angles to it and which works in a tube, the rear end of
the tube being slotted to allow the handle to pass out, notches being cut in the
walls of the slot for the stem of the handle to drop into to secure the bolt when shot
or withdrawn.
In such fastenings the notch (when the stem of the handle is in it) prevents the
bolt from being moved longitudinally, but the bolt is not prevented from being
turned and so freed from the notch.
According to this invention I provide a second or subsidiary notch at right angles
to the first which notch receives the stem of the handle and prevents it from being
turned. In order to free the bolt therefore two motions have now to be given, first
a slight longitudinal notion to free it from the second notch and then a rotary
motion to free it from the first notch. I still further secure the fastening by pre-
venting the above mentioned slight longitudinal motion being given to the bolt, this
I do by a pivotted catch which, when turned, or by its own weight, comes down
against the side of the handle so that no longitudinal motion can be given to the
bolt until this catch is turned up out of the way.
1011
ד י
1. 1000
W. G. FORSTER.
COMPLETE SPECIFICATION.
Improvements in Door and other Fastenings.
1, WILLIAM GEORGE FORSTER, of Lonesome Chemical Works, Streatham
Common, in the County of Surrey, Chemist, 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 relates to that class of fastening in which there is a bolt having a
handle projecting at right angles to it and which works in a tube, the rear end of
the tube being slotted to allow the handle to pass out, notches being cut in the walls
of the slot for the stem of the handle to drop into to secure the bolt when shot or
withdrawn.
In such fastenings the notch (when the stem of the handle is in it) prevents the
bolt from being moved longitudinally, but the bolt is not prevented from being
turned and so freed from the notch.
According to this invention I provide a second or subsidiary notch at right angles
to the first which notch receives the stem of the handle and prevents it from Leing
turned. In order to free the bolt therefore two motions have now to be given, first
a slight longitudinal motion to free it from the second notch and then a rotary motion
to free it from the first notch. I still further secure the fastening by preventing
the above mentioned slight longitudinal motion being given to the bolt, this I do by
a pivotted catch which, when turned, or by its own weight, comes down against the
side of the handle so that no longitudinal motion can be given to the bolt until this
catch is turned up out of the way.

page_text: DESCRIPTION OF THE DRAWINGS.
Figure is a front elevation of a fastening constructed according to this
invention.
Figure 2 is a similar view of the fastening when the bolt has been shot but the
catch H has not been turned.
Figure 3 is a side view of the fastening in the same position as in Figure 1 except
that the handle is turned outwards ready to shoot the bolt.
Figure 4 is a front elevation of a inodification suitable for being used in an
inverted position as shown.
A is the bolt, and B its handle. C is the tube in which the bolt A works, its
rear end is slotted at D to allow the handle B to pass out. Notches E and Fare
cut in the walls of the slot D for the stem of the handle B to drop into to secure
the bolt A when shot or withdrawn. G is a second notch at right angles to the
notch E which receives the stem of the handle B and prevents it from being turned.
His a catch pivotted at H.which drops or is turned against the stem of the handle
and secures the bolt.
In the arrangement shown in Figure 4 the top of the catch H may be notched to
prevent the bolt from turning and falling when withdrawn.
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. In fastenings of the kind referred to, providing a second notch to receive the
stem of the handle and prevent the bolt being turned substantially as described.
2. In fastenings of the kind referred to providing a second notch in combination
with a fastening to secure the stem of the handle of the bolt in it substantially as
described.
3. A fastening substantially as described and shown in the drawings.