Improvements in Locks.
Year: 1891

page_text: Date of Application, 7th May, 1891-Accepted, 13th June, 1891
CUMI LEIN DIMUITIATION.
Improvements in Locks.
I, JOSEPH LEGGE, of Stafford Street, Willenhall in the County of Stafford,
Lock Manufacturer, 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 object of my invention is to simplify the construction of locks of all
descriptions, but particularly of trunk and cash box locks.
22
In such locks the mechanism is generally mounted on certain "stumps," which
are riveted on to the lock plate, to which the " drill-pin" is also riveted in a
similar manner.
Two processes are thus necessary in the preparation of this part
of the lock. The lock plate has to be perforated for the reception of the "stumps
and "drill-pin," and then the stumps and drill-pin" have to be riveted in
their proper positions. Besides it is frequently found that the "stumps” and
drill-pin so fixed are liable to become loosened either by constant use or on
account of imperfect riveting.
According to my invention tongues pressed out of the lock plate itself, in any
suitable manner, are made to do duty for the " stumps" and "drill-pin," such
tongues being attached to the lock plate each by one end, and being made. to
project at right angles from the plane of the lock plate.
In order that the nature of my invention may be more clearly understood, I
will now describe it in reference to the accompanying drawings, and the letters of
reference marked thereon. The same letters occurring in different figures indicate
corresponding parts.
Figure 1 is a front view of a very simple lock plate and Figure 2 is a plan of
Figure 1. The lock plate A is here shewn fitted with " stumps" BC'D and
drill-pin" E in the usual manner, by riveting, the rivet heads being clearly
illustrated by Figure 2.
56
Figure 3 is a front view of the same lock plate treated according to my
invention, and Figure 4 is a plan of Figure 3.
It will be seen on reference to Figures 3 and 4 that B'C' D' are tongues
pressed from the lock plate A' in such a manner that they project forwards at
right angles to the plane of the lock plate their position corresponding to that of
the "stumps" CD on the lock plate A, Figures 1 and 2. Similarly it will be
seen that E is a tongue pressed from the lock plate A in such a manner that it
projects forwards at right angles to the plane of the lock plate its position
corresponding to that of the "drill-pin E, Figures 1 and 2.
The tongues above described are cut out on three sides only the fourth side
being that at which each tongue is attached to the lock plate. The same tool which
cuts the three sides of each tongue in passing through the lock plate turns the
tongues at right angles to the plane of the said lock plate. The tongues to serve for
stumps" and "drill-pin," are thus produced by one process; and indeed by a
very simple modification of the tool the lock plate itself can be pressed and the
tongues pressed out of it at a single operation.
66
I have not thought it necessary to illustrate or describe elaborately the construc-
tion of the tools for cutting out the tongues above described because they will vary
in different cases. But their shape and construction will always at once suggest
themselves to a practical man accustomed to the use of press tools.
Although I have described my invention only as it applies to the lock plate of a
lock it is obviously applicable to other parts, and very notably to the "stump" on
the "shut or "bolt of the lock, which according to my invention is made to
consist of a tongue projecting at right angles from the plane of the said "shut."

page_text: or "bolt" in the proper direction. But I may observe, generally, that my invention
is applicable to any part of a lock in which a pin is required to project from a plate
and in which that pin is at present riveted in its position.
Having thus 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 :-
"
1st. Forming the "stumps" and "drill-pin on a lock plate out of the metal of
the lock plate itself, substantially as and for the purpose herein described and
illustrated by Figures 3 and 4 of the accompanying drawings.
22'
2nd. Forming the "stump" on the "shut or "bolt" of a lock in a manner
analogous to that herein described in connection with the "stumps" and "drill-
pin" on a lock plate, and illustrated by Figures 3 and 4 of the accompanying
drawings.
"and
3rd. Forming whatever pins in a lock are required to project from a plate in a
manner analogous to that herein described in connection with the "stumps
drill-pin " on a lock plate, and illustrated by Figures 3 and 4 of the accompanying
drawings.
1
1001
JOSEPH LEGGE.