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 relates to window sash locks; and my said invention consists in
certain novel details of construction and arrangement of the parts composing the
same, as and for the purposes as will be hereinafter more fully described and form
the subject matter of the annexed claim.
The object of my invention is to provide a lock for the meeting rails of windows
which will be simple in construction, practical in operation, and so arranged that
the meeting rails, will, when the window is closed, be automatically locked together
and also to the window casing and in such a manner that the lowering of the upper
sash is prevented as also the rattling of both sashes.
In carrying out my invention, I proceed as follows, reference being had to the
accompanying drawings forming a part hereof and in which drawings
Fig. 1 is a view in front elevation and Fig. 7 is a perspective view of a portion
of a window and its adjoining casing, showing my lock applied in position thereon.
Fig. 2 is a detail perspective view in partial section of the portion of the lock
that is secured to the bead or portion of the window casing.
Fig. 3 is a similar view of the portion of the lock that is attached to the upper
sash; and
Fig. 4 is a similar view of the part of the lock that is secured to the top of the
meeting rail of the lower sash.
Fig. 5 is a view in perspective of the locking tongue and
Fig. 6 is a similar view of the part of the lock to which the said tongue is
pivoted, showing the same in position.
The letter A designates the bead or a portion of the side of the frame or casing
of the window, B the upper, and C the lower sash thereof
My window sash lock is composed of four parts, each of which is of novel
configuration, one of which is stationary being secured to a fixed portion of the
window casing, a second is attached to the face of the side rail of the upper sash
and moves therewith and a third part is attached to the top edge of the meeting
rail of the lower sash and moves therewith; the several parts being in proper
juxtaposition to each other as to accomplish the desired results.
The letter D designates the part of the lock that is attached to the vertical side
bead of the window casing, which part is slotted as at d, the upper edge thereof
being beveled as at d¹ for a purpose as will presently appear, and has pivoted to
its outer curved end a tongue having a beveled front edge as at d. E indicates
the member of the lock that is secured to the top of the meeting rail of the lower
sash, and this part of the lock has a curved end as at e that terminates in a short
depending projection as at el having a beveled base as at e², corresponding to the
bevel of the edges of the slot of in the member D-the said projection e¹ being
of a size relative to the slot d of part D to closely fit the same.
F indicates the member of the lock that is secured to the face of the side rail of
the upper sash, and this part F has a forwardly projecting lug ƒ whose under
surface is beveled as at "and one edge of the base thereof is prolonged as at .
When in position as shown in Fig. 1, the depending projecticu e' of the member E
enters the slot d, of the part D, and the two meeting rails of the window are
therefore held together and prevented from rattling.

page_text: To effect the locking of the parts, the lower sash must be raised slightly so as
to bring the part E out of engagement with the part. D. As the upper sash is
raised to its normal position, the member F, fixed to the vertical side rail of said
sash, is brought into engagement with the tongue of the member D, the curved
top edge of the part F meeting the curved lower edge of the said tongue ďª 5
and forcing the same back in the slot d of the part D and permitting the passage
past said tongue of the member F, after which the tongue d' swings forward and
engages beneath the projection f of the part F, the beveled surface f' of said
part F engaging the beveled edge of the tongue d The tongue d of the
stationary member D of the lock is thus confined between the projection f and 1
base, of the member F, and the rattling of the upper sash prevented.
The lower sash being now lowered to its normal position, during which move-
ment of the sash, the depending projection e' of the member E enters the slot d' of
the stationary member D and when so entering said slot, said projection el engages
the rear edge of the tongue and forces said tongue tight in place against the 1
member F, a shoulder d'formed at the top end of the slot d limiting the outward
movement of the tongue.
Thus, the member F on the upper sash is locked to the stationary member D,
and the rattling as well as the lowering of the upper sash is prevented.
Before the upper sash can be lowered, the lower sash must be raised so as to 2
disengage the member E from the member D and permit the tongue ď to swing
free, when the upper sash may be lowered.
A lock to prevent the raising of the lower sash and intended for use in
connection with the foregoing described lock, forms the subject matter of a separate
'application for patent filed simultaneously with this application.
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 :
The window sash lock described, composed of the stationary member secured to
the side of the window casing and having central slot and pivoted tongue, member
secured to the upper sash having projecting lug adapted to engage the tongue of
the stationary member, and member secured to the top of the meeting rail of the
lower sash having bent upper end and depending projection adapted to enter the
slot of the stationary member, substantially as and for the purposes specified.
Dated this 25th day of February 1892.
1
GEROLT GIBSON.