Lock for Sliding Doors. Page: 2 of 3
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UNITED STATES PATENT OFFICE
MILES HAYDEN AND WILLIAM CASON DIXON, OF GAY HILL, TEXAS.
LOCK FOR SLIDING DOORS.
APECIFICATION forming part of Letters Patent No. 330,236, dated November 10, 1885.
Application filed May 21, 185. Serial No. 166,331. (Model.)To all whom it may concern:
Be it known that we, MILES HAYDEN and
WILLIAM CASON DIXON, citizens of the United
States, residing at Gay Hill, in the county of
5 Washington and State of Texas, have invented
certain new and useful Improvements in Locks
for Sliding Doors, of which the following is a
description.
Figure 1 is a front view of the lock. Fig.
Io 2 is a front view of the lock with the front
portion of the door removed. Fig. 3 is aside
view of the key. Fig. 4 is also a side view of
the key, but showing the handle pushed in.
Fig. 5 is an end view of the head of the key.
15 Fig. 6 is a detail side view of the trip-lever.
This invention relates to locks for sliding
doors, and is specially intended for use in
freight-cars, where great durability and safety
are required. It will be found to be free from
20 liability to damage from collision, and may
be quickly and readily operated.
This invention consists in the detailed con-
struction of the lock and the key for operating
it, as hereinafter described.
25 In the accompanying drawings similar let-
ters of reference indicate corresponding parts
in all the figures.
A is the sliding door. B is a portion of the
framing in which it slides. C is a catch, se-
30 cured in the framing B, with which the latch
of the lock engages. D is a guard-plate fast-
ened on the outside of the door A, and con-
taining the key-hole d, oblong in form and
provided with a small guide-slot, d', in one
35 corner. E is a plate attached to the outside
of the framing and covering the junction of
the frame and door when closed, so that the
latch cannot be raised by inserting anything
between them. F is the latch, which engages
40 with the catch C when the door is closed.
This latch is pivoted to the door on the pin f.
G is a spring which presses upon the top of
the latch, and also upon the top arm of the
trip-lever. H is the trip-lever pivoted to the
45 door by the pin h and provided with the top
arm, h', upon which the spring G presses. h2
is the lower arm of the trip-lever, having a
projection, h', against which the key presses
in the action of unlocking the door. A pro-
50 jection, a, prevents the key from being turned
the wrong way in the lock. a' is a shoulder
which stops the key when it has been turnedfar enough. a' is a slot into which the sliding
bolt of the key projects to raise the latch. a'
is a small circular recess for guiding thehead 55
of the key.
I is the key for unlocking the door, provided
with a sliding bolt, J, attached to it by means
of the spring. K is the handle for operating
the sliding bolt. k is a stop on the said han- 60
dile, which prevents it from moving too far in
either direction.
A slot, i, is formed in the key for the stem
of the handle to slide in. The head of the key
is made hollow for the sliding bolt, and is pro- 65
vided with a projection, i', on one side of it
for engaging with the small slot, d', in the
guard-plate D.
The action of unlocking the door is as fol-
lows: The key is inserted into the lock through 70
the key-hole until the head of the key is un-
derneath the trip-lever,with the small projec-
tion on the head projecting into the circular
recess a3. The key is then turned in the di-
rection of the arrow in Fig. 2. The head of 75
the key presses upon the projection h3 of the
trip-lever and presses it back, thereby raising
the spring G and uncoveringtheslot a'. The
handle of the key is then pushed inward
against the spring until the sliding bolt pro- 80
jects, as shown in Fig. 4, and raises the latch
of the lock out of contact with the catch in the
frame.
We do not confine ourselves to the exact
form of lock as shown in the drawings, as our 85
invention can be applied to sliding doors in
various ways. If desired, the lock may be let
into the frame instead of being let into the
door, and the catch may be fastened to the
door instead of to the frame. 90
We prefer to make the key with a joint in
the middle, as shown in the drawings, so that
it may be folded up when not in actual use.
Having thus described our invention, what
we claim as new, and desire to secure by Let- 95
ters Patent, is-
1. In a lock, the combination of the latch,
the spring pressing upon it, and the trip-lever
provided with upper and lower arms, h' and
h', the former serving as a seat for the spring too
and the latter having a projection, h', for the
key to act upon, substantially as shown and
described, and for the purpose set forth.
2. In a, lock, the combination of the trip-
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Hayden, Miles & Dixon, William Cason. Lock for Sliding Doors., patent, November 10, 1885; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth171122/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.