Improvements in Sash Fasteners.
Year: 1891

page_text: Date of Application (in United Kingdom), 16th Oct., 1891
Complete Specification Left, 16th Oct., 1891-Accepted, 6th Feb., 1892
COMPLETE SPECIFICATION.
Improvements in Sash Fasteners.
I, GEORGE BEALE SLOAN Jr., of 107 West Van Buren Street in the City of
Oswego, in the County of Oswego, in the State of New York, United States of
America, Manufacturer, do hereby declare the nature of my invention, and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
This invention relates to the class of sash-locks which are applied to the meeting
rails of the upper and lower sashes of a window.
The object of the invention is to provide a sash-lock which shall be adapted to
retain the latch in its unlocked position sufficiently to allow a person to use both
hands in pushing up the lower sash and thus facilitate said operation.
And the object of the invention is also to provide the sash-lock with more secure
means for automatically drawing the sashes together in the operation of closing the
window and thereby prevent the sashes from rattling.
And to that end the invention consists in the improved construction and
combination of parts as hereinafter described and specifically set forth in the
claims.
In the annexed drawing,
Fig. 1 is a top plan view of a sash-lock embodying my invention,
Fig. 2 is a side view of the same,
Fig. 3 is an inverted plan view of the case to which the latch is pivoted,
Fig. 4 is a transverse section on line x, x, Fig. 3, and
Figs. 5 and 6 are end views of the sash-lock showing the same in its locked and
unlocked positions.
Similar letters of reference indicate corresponding parts.
C denotes the catch-plate which is attached to the top of the meeting rail R of
the upper sash and is formed with the rigid upward projecting hook a and with the
rigid vertical cam 6 facing said hook.
The shoulder or cam-proper being somewhat higher from the base of the
catch-plate than the locking shoulder a of the hook a for the purpose hereinafter
explained.
A represents a metallic case which is secured to the top of the meeting rail of
the lower sash and is formed with a tongue t which laps over the catch-plate C and
is provided with a slot through which both the aforesaid hook a and cam b protrude
when the window is closed.
The cross-bar" of the tongue t extending from side bar to side bar t¹t thereof
and uniting the same serves to brace the tongue so as to better enable it to resist
the strain it is subjected to in drawing the sashes together in the operation of
closing the window, for which latter purpose I slope the backs of the hook a and
cam & rearward as shown in Figs. 1 and 2 of the drawing, and preferably also
bevel the inner side of the cross-bar t¹ of the tongue which engages the sloping
hacks of the hook and tongue.

page_text: To the interior of the case A is pivoted the horizontally swinging latch 1, the
ends of which extend through slots c and respectively in opposite ends of the
case. One end of said latch lies upon the tongue t and is adapted to enter between
the free ends of the hook a and cam bin the operation of closing the window.
The opposite end of the latch is provided with a suitable handle by which to
manipulate it.
The case A is provided with a suitable detent adapted to engage the latch and
retain the same in its unlocked position. For simplicity of construction I prefer to
form said detent of a notch c' in the top edge of the slot c which notch is adapted
to receive and retain the locking end of the latch when thrown into its unlocked
position as represented in Fig. 6 of the drawing, thus enabling a person to employ
both hands for pushing up the lower-sash in the operation of opening the window.
The shoulder 6 of the cam 6 is in such a position that in raising the lower sash the
latch strikes the said cam-shoulder and is thereby thrown out of engagement with
the stop or notch c¹ after the latch is carried above the locking shoulder a¹ of the
hook a.
In this manner the latch is prevented from re-engaging the hook in
raising the sash and at the same time the latch is restored to its normal position
for automatically interlocking with the hook a in the operation of closing the
window.
In order to cause the latch to automatically spring into engagement with the
hook a, I employ a suitable spring & which is connected at one end to the interior of
the case A and bears with its opposite end against the side of the latch so as to
force the latter toward the hook a, and to ensure the engagement of the latch with
the notch c¹, I place the spring at such angle as to cause it to push the latch toward
said notch as shown in Fig. 4 of the drawing.
It will be observed that the lapping of the tongue t over the catch-plate C
effectually prevents the opening of the window by the insertion of an instrument
between the two meeting rails R R from the exterior of the window.
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. The combination of the catch-plate on the meeting rail of the upper sash
provided with a rigid hook and a rigid cam facing said hook and both projecting
vertically from said catch-plate, a horizontally movable latch on the meeting rail
of the lower sash extending between said hook and cam, and a detent on the latter
sash adapted to engage said latch and retain the same in its unlocked position, as
set forth.
2. In combination with the catch-plate C provided with the hook a, the case A
provided with the slot c and notch e' in the edge of said slot, the latch 7 pivoted to
the case and extending through the aforesaid slot, a spring arranged to force the
latch toward the notch c' and the throw-off cam 6 on the catch-plate, substantially
as and for the purpose set forth.
3. In combination with the catch-plate C provided with the hook a and cam b
formed with rearwardly sloping backs, the case A formed with the slotted tongue t
braced by the side-bars t¹¹ united by the cross-bar t", substantially as described
and shown.
Dated this 22nd 1
GEORGE BEALE SLOAN, JR.
Haseltine, Lake & Co.,
45, Southampton Buildings, London, Agents for the Applicant.