Improvements in Locks and Latches.
Year: 1891

page_text: Date of Application, 13th Aug., 1891
Complete Specification Left, 12th May. 1892-Accepted, 30th July, 1892
PROVISIONAL SPECIFICATION.
Improvements in Locks and Latches.
1, ALBERT DESLANDES of 13 Stopford Road, St. Heliers of the Island of
Jersey, Coal Merchant, do hereby declare the nature of this invention to be as
follows:-
::
My improved lock-which is designed to serve for doors, safes, strong rooms,
railway and latch locks or other purposes being made of a suitable form also as a
substitute for Norfolk latches, is fixed in any of the methods usually adopted in
fixing rim mortice or other locks; in such manner that the bolt which is fixed at
an angle of from 35° to 45° in order that the force of gravity may actuate or
facilitate the fall of the bolt. The Norfolk bolt is made with two slots through
which screws or pins are passed and has both ends rounded or sloped, so that the
bolt will move easily until it falls into a notch in the catch prepared to receive it.
An advantage in point of cost, and in smooth and easy working is gained by fixing
the lock, or the bolt diagonally at the angle described allowing the bolt to fall
entirely or partially by its own weight.
Dated this 13th day of August 1891.
JOHN BLACK,
Agent.
COMPLETE SPECIFICATION.
Improvements in Locks and Latches.
ALBERT DESLANDES of 13 Stopford Road, St. Heliers, in the Island of
Jersey, Coal Merchant, 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 improved lock, which is designed to serve for doors, safes, strong rooms,
railway and latch locks, or other purposes, also as a substitute for Norfolk
latches, is fixed in any of the methods usually adopted in fixing rim, mortice,
or other locks. The bolt of the lock is fixed at an angle of from 35 to 45 degrees,
in order that the force of gravity may actuate or facilitate the fall of the bolt.
This bolt, which I propose to call a Norfolk bolt, is made with two slots through
which screws or pins are passed and has both ends rounded or sloped, so that the
bolt will move easily until it falls into a notch in the catch prepared to receive it.
Although the bolt falls by the force of gravity alone, where required a spring or
springs may be fitted to actuate or control it.
In the simplest form as shown in Fig. 1 on the drawings appended hereto
a is the bolt a being the top thereof. c a screw with socket for y. a hanging staple
fixed thereto, d, d slots which engage the screws by which the bolt is fastened
to the door, e representing the frame of the door the door and the panel of same,
is the catch. Fig. 2 shows an enlarged view of the bolt, a being the bottom of
the bolt, and Fig. 3 an enlarged horizontal section of the bolt as fitted to the door
as shown in Fig. 1, the spindle & the front and back of catch respectively,
similar letters referring to similar parts in all the figures. In Figs. 4 and 5 the
bolt is shown as having fallen into the catch by its own weight as before mentioned,
and secured in that position by a staple and padlock. In this case the catch fis
fixed on the frame of the door, which is morticed or cut away to receive the door,
is the inner edge of the catch and the outer edge of the same, showing that the
catch can be fitted to right and left hand doors at will and being a stop or
D
تنف

page_text: staple affixed to the bolt. In Figs. 6 and 7 a further modification is shewn in which
the catch is fitted on the inside of tlie door, and similar arrangements are made for
securing it. Fig. 10 shows the gravity bolt as arranged for an ordinary rim or
mortice lock, m, m², and m² m³ m* and m being the frame, and o small lugs turning on
pivots fixed at each end actuated and controlled by the key, e represents the
frame of the door. Fig. 11 is an horizontal section of the same. Fig. 8 shows the
bolt with locking arrangement as fitted to the door, m, m³, m² m² in m³, being
the frame. Springs t, t', in this case are shown controlling the lock as actuated by
the key 7.
In this case the lug or pivot o is enlarged and is acted upon by a
handle, enabling the bolt k and k¹ to be moved independently of the locking action.
Fig. 9 shews plan of lock in section as marked 1, 2, in Fig. 8 w, w, w, being small
rollers placed to facilitate the action of the bolt k and k³ being the frame of the
bolt.
A simpler form of bolt and catch not shown on the drawings is where a simple
staple loosely hanging on the bolt may be turned up or down over another staple
prepared to receive it and there fastened by any suitable means, the bolt or catch
in this instance acting entirely by its own weight.
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. A catch or bolt fixed at an angle of from 35 to 45 degrees and actuated by
the force of gravity alone.
.
2. A bolt placed in a lock at an angle of from 35 to 45 degrees, and falling by
its own weight into a catch or receptacle prepared for it, and controlled or governed
by a detachable key.
3. A bolt with springs and lock mechanism fixed at an angle of from 35 to
45 degrees actuated by a handle and key and moving in a downward slanting
direction into a catch or receptacle prepared for it.
4. A. bolt, lock, or latch, with catch suitable for the reception of same as
described and illustrated substantially, and as set forth.
Dated this 12th day of May 1892.
JOHN BLACK,
Applicant's Agent.