A New or Improved Lock.
Year: 1892

page_text: Date of Application, 18th Jan., 1892-Accepted, 20th Feb., 1892
A New or Improved Lock.
We, ALEXANDER KENNEDY YOUNG of 13 Dixon Street Glasgow, Merchant,
and ROBERT CHESNEY, of 60 McLellan Street, Plantation, Glasgow Engineer,
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 a new or improved lock and has for its object simplicity
of construction and cheapness in production.
In order that our invention may be properly understood and readily carried
into effect we have hereunto appended an explanatory sheet of drawings in the
several figures of which corresponding parts are marked with the same letters of
reference.
Figure 1 is a front elevation.
Figure 2 is a plan of Figure 1.
Figure 3 is a sectional end view taken through a Figure 1:
Figure 4 is a front elevation of part of the lock under a modification.
A is the plate which is screwed on to the inside of the door, and to this plate
there are pivoted at one end by means of rivets or screws B B two bolts CC,
which when the lock is closed or shut lie in the position as shown in Figure 1, the
pind preventing them from coming too close together, and the springs GG which
are secured to the plate A, retaining the bolts in their closed position. Fixed to
the plate A there are two pins a a on which there slides or works a kind of cone or
wedge-shaped piece F preferably grooved having a handle or knob E attached to
it. This cone or wedge shaped piece F has at its lower end an opening or hole b
into which the key H passes through the hole c in the plate A when the door is to
be opened from the outside. This key as shown in Figure 3 of the accompanying
drawings has a screw at the end of it which fits into a corresponding screw in the
cone or wedge-shaped piece F, but it is to be understood that the key may be
constructed in any other form to suit other catches in the cone or wedge-shaped
piece F.
The door is opened from the outside in the following manner. The key His
inserted into the lock and gets fixed into the cone or wedge-shaped piece F, and is
then pulled in an outward direction. In doing this the cone or wedge shaped
piece slides down the pins a a, at same time opening out the bolts CC, thus
releasing them from the catch 1 which is fixed to the door sash, and so allowing the
door to be opened. When the key is released the cone or wedge-shaped picce F
slides up the pins a a again, thus allowing the bolts C C to return to their normal
or closed position, and they are kept in such position by means of the springs G G.
The band always keeps the bolts CC flush with the plate A.
In opening the door from the inside the hand is pressed against the handle E,
and it forcing down the cone or wedge-shaped piece F opens out the bars C C thus
releasing them from the catch I.
In order to assist the opening of the door we may provide a knob Q to the plate
or door so that while the lower part of the hand presses in the handle E the fingers
catch hold of the knob Q and open the door.
In place of having two springs to retain the bolts in their normal or closed
position as described and shown with reference to Figures 1, 2, and 3 we may only
have one spiral spring K as shown in Figure 4.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what
we claim is :-
1. The general arrangement and combination of the parts constituting our new
or improved lock operating in the manner substantially as herein before described
and shown on the accompanying sheet of drawings.
2. The new or improved lock consisting of the bars CC fixed at one end to the
plate A, the pin d, and band J, the springs G G, the pins a a, and cone or wedge
shape piece F catch I, and key H, all operating in the manner substantially as
described and shown in Figures 1, 2, and 3 of the accompanying sheet of
drawings.
3. The new or improved lock consisting of the bars C C fixed at one end to the
plate A, the pin d, and band J, the spiral spring K, the pins a a, and cone or
wedge-shaped piece F, and catch I, and key H all operating in the manner
substantially as described and shown on the accompanying sheet of drawings.
Dated this 16th day of January 1892.
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicants' Agents.