Improvements in Locks.
Year: 1889

page_text: Date of Application, 22nd July, 1889-Accepted, 19th July, 1890
COMPLETE SPECIFICATION.
Improvements in Locks.
I, STEPHEN W. HUNTON, a citizen of the United States, residing at Wilkinsburg,
in the County of Allegheny and State of Pennsylvania, Furniture 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, reference being had to the accompanying drawings, which form a part of
this specification
My invention relates to an improved lock; and it consists in a bolt provided with
a head adapted to enter and be confined between two sliding blocks operated by
means of connecting-rods and double crank attached to a shaft provided with
handles, which extend through the door on which the lock is attached, together with
certain other details of construction and combination of parts, as will be fully
described hereinafter.
In the accompanying drawings,
Figure 1 is a front elevation of my improved lock constructed in accordance with
my invention.
Fig. 2 is a sectional plan view on the line of the same.
Fig. 3 is a front elevation of the knob, showing the position of the locking
device.
To put my invention into practice, I provide two metallic blocks A and mount the
same in suitable slides bon a plate c, which is adapted to be attached to the frame d
of a door by screws e. On one end of each of these blocks A is formed a series of
inter-locking dovetailed projections and corresponding recesses g, which, when the
blocks A are brought together, cannot be separated by a lateral strain brought against
or from either side of the blocks A. At the rear of each of these blocks A is a spiral
spring, so placed as to keep the same together. Passing transversely through the
plate c is a short shaft k, to which is rigidly secured a double crank 1, each end of
which is separately connected by short rods m to the blocks A in a manner that when
the shaft is partially revolved the blocks A will move toward or away from each other.
A locking device may be attached to this shaft & to be operated by a key or com-
bination. I now provide a sliding bolt p, having an enlarged head' o, of peculiar
construction, which is adapted to enter an opening, formed in the sides of
the blocks A when the same are open, and be confined therein when the same are
closed.
The lock herein shown and described is especially adapted for use on sliding doors,
and the sliding bolt p can be fixed either to the sliding door or to the jamb or
frame, as desired.
In the drawings I have illustrated the lock as applied to the jamb and the sliding
bolt pas secured to the door but these parts can be reversed without interfering
with the successful operation of the device.
To secure the bolt p between the locking-blocks A, the shaft k is turned to move
the links m m, so as to simultaneously move the locking-blocks away from each other,
and thus separate the interlocking fingers thereof, so that the bolt-head can fit in the
recess r, provided in the contiguous opposing edges of the locking-blocks, after which
the shaft is reversed to force the blocks toward each other, thereby causing the
fingers of the blocks to again interlock with each other and adjust the blocks upon the
heal of the bolt to confine the bolt between the blocks, as is obvious.

page_text: 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. A lock for sliding doors, consisting of two blocks limited to vertical movement
in opposite directions on a fixed base, and having interlocking fingers formed in their
opposing edges, and a recess for the reception of a bolt-lead, and a headed bolt
limited to endwise movement in a line at right angles to the line of movement of the
blocks, substantially as and for the purpose described.
2. Á lock for sliding doors, consisting of two sliding blocks limited to vertical
movement in opposite directions on a guideway of a base, and having the interlocking
fingers, and a recess formed in their opposing edges, an axially-turning shaft
connected by intermediate devices with said blocks for adjusting the latter simul-
taneously in opposite directions, and a headed bolt, substantially as and for the purpose
described.
In testimony that I claim the foregoing I hereunto affix my signature this 15th
day of April A.D. 1889.
In presence of―
M. E. HARRISON.
H. J. LEVIS.
STEPHEN W. HUNTON.