Improvements in Sash Locks.
Year: 1892

page_text: Date of Application, 19th Apr., 1892-Accepted, 18th June, 1892
COMPLETE SPECIFICATION.
Improvements in Sash Locks.
I, GEROLT GIBSON, Lawyer, a Citizen of the United States of America, of
No. 325 Chestnut Street, Saint Louis, Saint Louis County, State of Missouri, do
hereby declare the nature of my invention for IMPROVEMENTS IN SASH LOCKS, and
in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement :—
My invention has for its object, first, to prevent the rattling of window sashes,
and second, to lock the upper sash so as to prevent its being lowered; the locking
of the two sashes to prevent rattling being automatic upon the parts of the device
coming together in closing the window, while the locking of the upper sash so as
to prevent its being lowered is not automatic; and this device is intended for use
in connection with a suitable lock for locking the lower sash when closed.
In carrying out my invention I proceed as follows-reference being had to the
accompanying drawings forming a part hereof and in which drawings
Figs. 1 and 2 are views in elevation of my window sash lock as applied in
position.
Figs. 3, 4 and 5, are views in detached detail of the several parts composing my
lock.
My window sash lock is composed essentially of three parts of novel configura-
tion the part L being attached to the top of the meeting rail of the lower sash,
the part D imbeded flush with the face of the side rail of the upper sash near
the meeting rail, and the part A fixed to the vertical bead that separates the
two sashes. The part L has a hook end W that when the parts of the lock are
in their locked position engages a lug B of the part A. B¹ is a lug formed on
the member A and similar in contour to the lug B and these lugs B and B' have
curved edges N and G respectively and are separated by a slot C for a purpose
as will presently appear.
The member D is a rectangular frame within which is arranged to slide a bolt H
having a finger depression J and laterally projecting lug K, and at one corner a
lug E with curved under surface F.
The curved surfaces N and G of the lugs B and B₁ of the part A of the lock
are adapted to fit respectively the curved surface F of the lug E of the member D
and beneath the hook_end W of part L, and the slot C of part A is to receive
the lug K of the bolt H.
To lock the sashes of the window to prevent their rattling-supposing the two
sashes to be slightly separated as in Fig. 1-upon raising the upper sash, the lug E
is brought in engagement with the lug B of the immovable member A of the
lock and by reason of the curved engaging surfaces of said lugs the top sash is
drawn towards the lower sash-now upon lowering the lower sash, the hook end W
of the member L engaged the lug B and the said lower sash is similarly drawn
towards the upper sash thus the two meeting rails of the window are brought
together and both of said sashes being locked to an immovable part of the window
frame, rattling of said sashes is prevented.
To lock the top sash so as to prevent its being lowered, the bolt H is shot so
that the lug K will enter the slot C of the member A as in Fig. 2. The upper
sash cannot therefore be lowered until the said bolt is withdrawn.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:
The window sash-lock described, composed of the member L with hook end W,

page_text: secured to the top of the meeting rail of the lower sash; the member A with
lugs B and B and slot C, secured to the vertical, dividing bead of the window
frame and the member D with lug E F and sliding bolt H K all constructed and
arranged to operate substantially as and for the purposes specified.
Dated this 25th February 1892.
GEROLT GIBSON.