Improvements in Combined Locks and Latches.
Year: 1891

page_text: COMPLETE SPECIFICATION,
Improvements in Combined Locks and Latches.
I, CHARLES RETTIE, of 29, Alder Street, Toxteth Park, Liverpool, England,
do hereby declare that the nature of my invention the title of which is IMPROVE-
MENTS IN COMBINED LOCKS AND LATCHES, and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:
My invention relates to improvements in combined locks and latches and is
specially designed for use on cupboard and water-closet doors and where there is
much jar and vibration, as on board ships.
In the drawings herewith accompanying and making a part of this application,
Fig. 1. is a view of a part of a door having my improved lock and latch attached
thereto, Fig. 2. is a cross section of the same, Fig. 3. is a plan of the inside of a
door having my lock and latch attached and showing the spring and its recess in
dotted lines, Fig. 4. is a section of Fig. 3. taken on line 1-1, and in all said figures
same letters refer to like parts.
g
In the edge of a door a is made a recess and in said recess is pivoted a latch_
having a set off b, finger c and beveled edge d and handle or knob e, which extends
outwardly from the outside of the door. At the rear of said latch is a spring t
arranged to force the finger end of the latch outwardly so as to engage with the
casing when the door is closed. Directly behind the latch in the door is made a
recess or well in which is pivoted a lock-bar having a spur-projection i 80
arranged in said recess that the lock-bar may be turned to right or left to allow
the latch to be forced backward and the door opened when said projection i is
turned against the edge of the extension of the recess as shown in Fig. 1. Over
said lock is placed a cover which holds it in place and a key / passes through the
lock-bar. Said key has a handle m and extends through the door and terminates
in a stem n by which said lock-bar may be operated to lock and unlock the door
from the outside as well as the inside. On the under side of the lock-bar is made
a series of indentations o into which the bent part p of a spring g fits. By this
spring the lock-bar is kept in any desired position.
It will be evident that the principle involved in this invention is the same
whether the lock-bar is inserted in a recess in the face of the door or is contained
within a hollow case which is adapted to be attached to the face of the door.
The operation of my improved lock is as follows: to lock the door from the
inside, take hold of the knob m of the key and turn the lock-bar until it reaches
the position shown in Fig. 1, directly behind the finger end of the latch; to unlock
and open the door from the inside, turn the lock-bar until the projection i strikes
against the edge of the recess f, then press the finger c of the latch backward, the
cover k having a slot r therein to permit said backward movement, and push the
door open; to unlock and open the door. from the outside, insert a key in the key-
holes and turn the lock-bar as before, then press knob e forward and pull the
door open.
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 combination with a latch pivoted in the edge of a door and a spring
arranged to force said latch outwardly to engage a clip in the door jamb, of a
plate or cover located behind said latch and having a recess therein to receive
said latch when drawn back, a locking bar having a spur thereon arranged beneath
said cover and means substantially as set forth for rotating said locking bar into

page_text: positions which will respectively lock and unlock said latch, substantially as and
for the purposes set forth.
2. The combination with a latch pivoted in the edge of a door, a spring con-
stantly tending to force said latch outward a locking-bar set in a recess in the
face of the door and having a spur thereon as set forth and a key for operating
said locking-bar and a series of indentations in the under side thereof, of a spring
set in said-recess and having a bend therein adapted to enter said indentations
and hold said locking-bar in any desired position, substantially as and for the
purposes set forth.
Dated this 17th day of February 1891.
CHARLES RETTIE.