Improvements in connection with Locks and Keys.
Year: 1894

page_text: Date of Application, 19th Nov., 1894
Complete Specification Left, 17th Aug., 1895-Accepted, 19th Nov., 1895
Improvements in connection with Locks and Keys.
JAMES KELLETT Oldfield 199 Dawes Road Fulham London S. W. Builder do
hereby declare the nature of this invention to be as follows:-
The improvements I claim is more connected with the key and keyhole than with
the internal mechanism of the lock.
The key consists of an outside tube inside which the shank of the key works and
by pressing forward the shank after insertion in the key hole lifts up the stud of the
key by means of two connecting rods working on pins to end of shank and stud of
key. The stud of key working on pins through outer casing to give it the necessary
movement inside the lock through a groove made in the inside end of the key hole
and when the key is turned and comes opposite the groove the stud shuts up again
by means of a spiral spring working inside the outer lining of the key and coiled
round a reduced portion of the shank of the key with check pin through outer
lining and working backward and forward in a slot through the shank the necessary
length for sliding purposes.
The key hole is made by a tube outside the lock fastened into a larger tube
inside the lock and one or more grooves are cut in the larger tube the stud of the
key to open.
November 10th 1001
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JAMES KELLETT OLDFIELD 199 Dawes Road Fulham London Builder 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:-
The improvements I claim is more connected with the key and key hole; than
with the internal mechanism of the lock, the object being to have a round key-hole
and the key to open out after insertion in the lock. The key consists of an outside
metal tube, inside which the shank of the key works; and by pressing forward the
shank after insertion in the key hole of lock, lifts up the stud or bit of the key by
means of connecting rods working on pins to end of shank and stud or bit of key.
The stud or bit of key working on pin through outer tube, the end of outer tube,
is made solid, where practicable, to allow stud to open and shut, for better
securing pin; through the outer tube a grove being cut in the solid end and the
outer tube, to allow the stud to open and shut.
The stud or bit of key is shut down level with the outer tube, by means of a
spiral spring coiled round a reduced portion of the shauk of the key against a check
pin or abutment through the outer tube, and working backwards and forwards,
through a slot cut through the shank of key; the necessary length for sliding
purposes.
The key hole consists of a metal tube, size of key, made with a slot cut inside the
lock; to allow the stud or bit of key to open up inside the lock; and fixed to the
lock, according to kind of lock for which it may be used.

page_text: In order that the invention may be clearly understood, reference is had to
accompanying sheet of drawings in which
Fig. 1. shows inside lock with stud or bit (A) of key open, and key hole with
screw (B) from face plate through the lock and into outer rim of the key hole,
which will be necessary in some description of locks.
Fig. 2. shows end of lock with screw heads (C) for securing rim of key hole, as
will be required for mortise or other locks.
Fig. 3 shows end section of a lock with key (D) open inside, also showing tube
and rims (E) forming key hole.
Fig. 4 shows key, shut with check pin (F) serving an abutment of the spiral
spring.
Fig. 5 shows key open, with slot (G) through shank of key and spiral spring,
with connected rod (H) from shank to stud.
Fig. 6-7 shows alternative form of key handle, which will be without lateral
projections when not in use; the dotted lines (I) show handle in position for use, and
more than one bit may be used in the construction of the key, and applicable for
other than lever locks.
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.) The construction of the lock and key substantially, and for the purpose,
herein before described.
(2.) The method of lifting one, or more bits of the key, to any length form or
angle inside the lock, substantially as described.
(3.) In connection with my improved key a handle substantially as described.with
reference to Figs. 6 & 7.
Dated this 16th day of August 1895.
JAMES KELLETT OLDFIELD.