An Improvement in Door Locks.
Year: 1889

page_text: Date of Application. 31st Oct.. 1889
Complete Specification Left. 30th July. 1890-Accepted, 4th Oct., 1890
An Improvement in Door Locks.
EMIL HOLLANDERS 3 Queen's Buildings Osborne Road Southsea, Chronometer
Watch & Clock Maker, do hereby declare the nature of this invention to be as
follows:-
--
A compound locking tumbler or bolt & cam arranged as under. The tumbler
revolves round a centre and is not fixed to the handle but to the cam moved by it when
opening or locking the door. The tumbler revolves on the cam in three ways. In one
concentrically, in another excentrically and in a third round a pin excentrically to the
cam. These movements are arranged so that the tumbler may be moved independently
of the handle & cam when the latter are in certain positions. When the handle is
turned to open the door, the tumbler is withdrawn by the cam. In closing the door
the tumbler is self-acting as in an ordinary spring latch and on the handle being turned
forward the tumbler is thrown out further, locked, and a projection of the cam is
turned into the striking plate.
TEL: 20 of Out 1000
EMIL HOLLANDERS.
COMPLETE SPECIFICATION.
An Improvement in Door Locks.
I EMIL HOLLANDERS 3 Queen's Buildings Osborne Road Southsea Watch and
Clock Maker 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:-
A compound locking tumbler or bolt and cam arranged as under. The tumbler
revolves round a centre; and is not fixed to the handle, but to the cam moved by it;
when opening or locking the door. The tumbler revolves on the can in three ways,
in one concentrically, in another excentrically and in the third round a pin
excentrically to the cam. These movements are arranged so that the tumbler
may be
moved independently of the handle and cam when the latter are in certain positions.
When the handle is turned to open the door, the tumbler is withdrawn by the cam. In
closing the door the tumbler is self-acting as in an ordinary spring latch and on the
handle being turned forward the tumbler is thrown out further, locked, and a projection
of the cam is turned into the striking plate.
In the accompanying drawing
Fig. 1 represents the lock with the tumbler and cam in their normal positions.
Fig. 2 represents the front plate of the lock and
Fig. 3 the lock with tumbler cam &c. in their locked positions.
The parts are lettered as follows, A-tumbler. B-cam. C-transmitter of springs S
to tumbler A. D-transmitter of springs and locking bar combined to cam B.
H-centre of, and hole in, cam B through which handle passes. X-centre through
which tumbler A is pinned to cam B.
In the normal position shewn in Fig. 1 the tumbler A is free to act as a latch
without moving the handle or cam B thus permitting the use of weak springs S or
gravity alone, and obviating the necessity for slamming the door. In order to with-
draw the tumbler A so as to open the door, it is necessary to turn the handle back or
to the left, when the long side of the cam B moves the tumbler A within the front
plate.
In the locked position Fig. 3 the handle and can have been moved forward or to the

page_text: right. The tumbler A is fixed by the front plate of the lock so that it cannot be forced
back and the long side of the cam B projects- beyond the front plate.
This invention is specially designed for use with my (Hollanders) patent
number 12039 improved striking plate dated the 21st day of August 1888.
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.
1st. The combination of the tumbler A and the cam B.
2nd. The arrangement of the springs S and the transmitter C in combination
with A.
3rd. The arrangement of the springs in combination with D and B.
EMIL HOLLANDERS.