Improvements in Locks for Doors, Drawers, and for other purposes.
Year: 1895

page_text: Date of Application, 3rd Apr., 1895-Accepted, 11th May, 1895
COMPLETE SPECIFICATION.
Improvements in Locks for Doors, Drawers, and for other purposes.
We, JAMES EDMUND ALLDRITT SQUIRE, and HENRY ALEXANDER SQUIre,
both of New Invention, near Wolverhampton, Lock Manufacturers and Brass
Founders, 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 has reference to all kinds of door locks, drawer locks and other
like locks and consists in constructing and arranging the spring tumbler in com-
bination with the bolt as herein described whereby the spring tumbler is not liable
to break in wear, and the cost of manufacture of the locks is reduced.
We will describe this invention by referring to the accompanying drawings on
which
Fig. 1 is an elevation, partly in section, of a lock constructed according to this
invention, showing the parts in the positions which they occupy when the bolt is shot
forward into its locked position ;
Fig. 2 shows the same parts as Fig. 1 but with the bolt shot back into the case
as when it is unlocked ;
Fig. 3 shows the spring tumbler separately;
Fig. 4 shows the well known ordinary bolt of the said lock separately; and
Fig. 5 shows another arrangement of our invention.
The same letters of reference indicate the same parts in all the figures.
In carrying out this invention we make the tumbler C and its spring in one piece
of steel wire or other suitable spring wire, or of a strip of steel or other suitable
spring metal, bent to about the shape shown by Fig. 3, by examination of which it
will be seen that the piece of wire or spring metal is bent at c so as to partly
encircle the pin A. This pin A may also form a guide for the back part of the
bolt B which as in some other well known locks is slotted to take on to this pin A
as shewn in Figs. 1, 2, and 4; or the spring wire tumbler C may be carried by a
separate pin E outside the bolt B as shewn in Fig. 5. In either case the front of
the bolt is guided in the usual manner as shewn namely by passing through the
hole d in the front of the lock case. The said spring tumbler C thus has two
arms c', c, one of which c¹, takes against the side d¹ of the lock case and forms
the spring for the tumbler, and the other arm is bent in the form of a projection
at c against which the pin 6 of the bolt B comes in contact when the lock is locked
as shown in Fig. 1 thus forming a stop to prevent the bolt B being moved back except
by turning the key to lift the arm. The extreme end c of this arm c² rests upon
the pin when the bolt is shot forward. D is the pin on which the key turns. The
bolt B is made in any convenient shape at 63 (for instance as shewn by Fig. 4) for
the key to engage with.
The improved spring tumbler C and bolt B act in the usual way, that is to say,
when the key is inserted in the lock and turned the bit of the key lifts the arm c
of the spring tumbler and also shoots forward the bolt B into its locked position
shown by Fig. 1 so that the projection of the arm c² will, by coming in contact
with the projection block the bolt B in its forward position. When the key is
turned in the opposite direction the bit lifts the arm and then acts upon the
bolt B and shoots the same back into the lock case where it is maintained by the
projection of the spring tumbler acting on the projection of the bolt B.

page_text: It will be seen that by constructing and arranging the spring tumbler and bolt as
above described the lock is rendered very simple and cheap to manufacture.
This invention is applied to rim locks, dead locks, and other door locks similarly
as above described with reference to a cupboard door lock.or drawer lock.
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. In a door-lock, drawer-lock or other like lock provided with a bolt such as B
which is guided by the front of the lock case and by a slot in the back part of the
bolt working on a pin, the employment, in combination with the said bolt, of the
spring wire or strip metal tumbler C carried by the said pin which guides the bolt
and constructed and arranged and acting on the said bolt in the manner herein before
set forth and shewn by Figs. 1, 2, and 3 of the accompanying drawing.
2. In a door-lock drawer-lock or other like lock provided with a bolt such as B
which is guided by the front of the lock case and by a slot in the back part of the
bolt working on a pin, the employment, in combination with the said bolt, of the
spring wire or strip metal tumbler C carried by a pin outside the bolt and con-
structed and arranged and acting on the said bolt in the manner hereinbefore set
forth and shewn by Fig. 5 of the accompanying drawing.
3. The improved spring tumbler for door-locks, drawer-locks and other like locks
made from wire or strip metal bent to the form substantially as shewn by Fig. 3 or
by Fig. 5 for the purposes set forth.
Dated this 1st day of April 1895.
CHARLES BOSWORTH KETLEY,
Agent for the Applicants.