Year: 1887

page_text: Date of Application, 5th Mar., 1887.
Specification Accepted, 19th Apr., 1887.
We CARL MARKMANN and LOUIS PETERSMANN of Neviges in the Kingdom of
Prussia and German Empire Manufacturers do hereby declare our invention and
in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement:-
The present invention described and illustrated by the accompanying drawings
relates to the manufacture of locks of any desired size by means of only one invariable
size of lock mechanism or interior a bolt of the required length being inserted and
fixed in the space designed for it in the lock mechanism.
By this arrangement dealers and purchasers of locks need no longer keep a stock of
locks of different sizes, being enabled to combine their locks in any size that is wanted
they will simply have to provide the mechanism a single size of which will suffice to
form all sizes of locks in use with a bolt of the required length that can be applied
without dismounting the mechanism or even removing any part of same.
Figure 1 of the accompanying drawing shows the work in front view without cover
plate. Figure 2 is a side view with cover plate. Figures 3, 4, and 5 shew different
bolts which are to be fixed in the lock works.
The outer lock plate a serves as base to the plate d which is freely supported on the
lateral guides b and c for the bolt.
The open space formed between the outer lock plate a and plated and between
the lateral guides b and c (fig. 2) is designed to receive the body or shank of the bolt
(figures 3, 4 and 5) which after being inserted works between the guides b and c.
This bolt is held in place by the heads of small screws e and f on the plate d. The
plate d is guided on its supports by a pin g and a spring pink which pass through
slots in the plate d.
i
The pin serves for hollow keys whilst for solid keys there must be a perforation to
receive the pin of the key.

page_text: On the plate d there are placed levers which have their fulcrum in the spring pink.
Instead of this (the so called Chubb's system) any other system may be employed.
The whole mechanism is closed by a plate provided with a key hole (with or without
barrel).
By the accompanying drawing and this specification are described lock mechanism
which when provided with a bolt may be used as furniture locks.
The application or fastening on a piece of furniture is very simple. The lock works
are fastened at a convenient distance from the key hole to the upper edge of the wood
then the bolt is inserted between the screws e and sufficiently deep so as to get the
bolt head in flush with the upper edge of the wood after this the bolt is fastened by
screwing up the screws e and f.
The case may be made of any material or of any desired shape. By making the
necessary changes this construction of lock mechanism may also be applied to any
other kind of lock.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed we declare that what we claim is :—
Constructing the interior or works of locks suitable for the manufacture of locks of
any size by introducing and fastening a bolt with the desired length of body without
being compelled to dismount the works or even to remove any part thereof this being
effected by an arrangement of parts whereby the plate d in the lock works is freely
supported and the open space thus formed between the plate d and the outer plate a
of the works is reserved for receiving the body of a bolt.
Dated this 5th day of March 1887.
BROWNE & Co,
Agents for the Applicants.