Improvements in Locks for Sliding Doors.
Year: 1896

page_text: Date of Application, 10th Apr., 1896
Complete Specification Left, 2nd June, 1896-Accepted, 1st Aug., 1896
Improvements in Locks for Sliding Doors.
1, GEORGE ALBERT MANCHESTER, a citizen of the United States, of Box 1321
Providence, in the County of Providence, and State of Rhode Island, Clerk, do
hereby declare the nature of this invention to be as follows:-
This invention relates to door locks, and particularly to that class thereof, which is
used in connection with sliding doors; and the object of the invention is to provide
an effective device of this kind, which may be employed in connection with sliding
doors, wherever used, and which is particularly applicable to car doors; and with
this and other objects in view, the invention consists in the construction, combination
and arrangement of parts, hereinafter described.
In the practice of my invention, I employ a casing of any preferred form, having
a back, a bottom, ends and a top plate, said casing being in use also provided with
a front side or casing.
Within the casing is pivoted an arm, said arm being pivotally connected with the
casing near the rear end thereof, and arranged above said arm, and mounted in
bearings secured to the back of the casing is a sliding bolt and the bearings in which
said bolt is mounted.
Formed on the upper side of the arm, near the middle portion thereof, is a
shoulder, and formed on the lower side of said arm, is a shoulder, the outer surface
of which is beveled or inclined.
Connected with the bottom of the casing is a bar which extends through the
front side thereof, and formed thereon is an inclined shoulder adapted to operate
in connection with the shoulder on the arm.
The arm projects through a slot formed in the end of the casing, and the outer
end thereof is provided with a downwardly directed hook or projection, which is
adapted to pass through an opening formed in the plate which is secured to the
frame in the door or the body of a car.
The plate is provided with a projection or shoulder in which the opening is formed,
adapted to receive the hook or projection of the arm and the operation will be
readily understood from the foregoing description.
The pivoted bar extends through the front of the casing and in the normal position
of the parts, the arm is raised thereby into position by simply moving said bar
backward under the shoulder formed on the arm. Whenever it is desired to lock
the door, the bar is moved forward, and the arm dropped into position in which the
hook or projection formed thereon passes through the opening formed in the plate,
and the bar is locked in this position by inserting a properly constructed key and
sliding the bolt forward until it rests on the shoulder formed on the upper side of
the arm.
The bolt is provided on its under side with a notch or recess in which the key
operates and whenever it is desired to unlock the door the bolt must be moved
backward by the key and the arm may be raised by operating the bar as will be
readily understood.
Although I have described the casing of my improved lock as secured to or
connected with the door and the plate as connected with the frame thereof, it is
evident that this arrangement may be reversed and the casing secured to the frame

page_text: in this position by inserting a properly constructed key and sliding the bolt H forward
until it rests on the shoulder g formed on the upper side of the arm as shown in
Fig. 1.
The bolt H is provided on its under side with a notch or recess in which the key
operates and whenever it is desired to unlock the door the bolt H must be moved
backward by the key and the arm G may be raised by operating the bar K as will
be readily understood.
The bar G is also provided at its outer end with an outwardly directed extension R
in which is formed an aperturer and the plate M is provided with a corresponding
projection m in which is formed a similar aperture or opening not shown and by
means of this construction the arm G may be sealed to the plate N in the usual or
any desired manner.
My invention is not limited to the exact form construction and arrangement of the
various parts shown and described and I therefore reserve the right to make all such
alterations and changes therein as fairly come within the scope of the invention.
Although I have described the casing of my improved lock as secured to or
connected with a door and the plate M as connected with the frame thereof it is
evident that this arrangement may be reversed and the casing secured to the frame of
the door and the plate M to the door the construction and operation being substantially
the same in either case.
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. In a lock the combination of a casing an arm pivotally secured therein at
one end thereof and projecting through the opposite end a pivoted bar arranged
transversely of the casing below said arm by which it may be raised and a sliding
bolt mounted in said casing above said arm by which the latter may be held in a
depressed portion, substantially as shown and described.
2. The combination with a sliding door of a lock comprising a casing in which is
pivoted an arm one end of which projects through a vertical slot formed in the end
of the casing a pivoted bar arranged transversely of the casing below said arm and
a sliding bolt arranged longitudinally of the casing above said arm said bolt being
adapted to hold said arm in a depressed position and said transverse bar to raise the
same the outer end of said arm being provided with an upwardly directed hook or
projection which is adapted to pass through a plate secured to the frame of the door
substantially as shown and described.
3. The combination with a door of a casing secured thereto an arm pivotally
connected with said casing at one end thereof and extending through a vertical slot
formed in the opposite end said arm being provided on its outer end with an
outwardly directed shoulder and on its upper end with an upwardly directed
shoulder and a bar arranged transversely below said arm and pivotally connected
with the casing and adapted to operate in connection with a downwardly directed
shoulder formed on the arm to raise the same, a sliding bolt mounted in said casing
and adapted to bear on an upwardly directed shoulder formed on said arm so as to
hold the arm in a depressed position the outer end of said arm being also provided
with an upwardly directed hook or projection which is adapted to pass through a
plate secured to the door frame substantially as shown and described.
Dated this 1st day of June 1896
WHEATLEY & MACKENZIE,
40 Chancery Lane, London, W.C., Agents.