Improvements in Sash Fasteners.
Year: 1893

page_text: COMPLETE SPECIFICATION.
[Communicated from abroad by STEPHEN OLIN JOHNSON, of 810 Second
Avenue, in the City of Detroit, Wayne County and State of Michigan,
United States of America, Manufacturer.]
Improvements in Sash Fasteners.
I, HENRY HARRIS LAKE of the firm of Haseltine Lake & Co., Patent Agents,
45 Southampton Buildings in the County of Middlesex 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 :—
This invention consists in the peculiar construction of a detachable key adapted
to enter and be locked in a key plate on the upper sash having a stem extending
across the lower sash and a wing on the stom adapted to normally turn the key
with the locking lug into its locked position.
Further in the peculiar construction of a wearing plate on the upper sash with
which this wing is adapted to engage to tightly lock the windows in their closed
positions and hold them against rattling, all as more fully hereinafter described.
In the drawings,
Fig. 1 is a vertical section through adjacent portion of the upper and lower
sash of my device applied to it shown in position in which the two sashes are
locked together.
Fig. 2 is a detached elevation of the key plate.
Fig. 3 is a plan view of the wearing plate.
Fig. 4 is a top plan viow of the locking key.
Fig. 5 is a perspective view of the looking key in position together with a
modified form of key plate.
Fig. 6 is a vertical section through the key plate, the parts being in the position
shown in Fig. 5.
Fig. 7 is an elevation similar to Fig. 1 showing the key used without the
wearing plate.
A represents the upper sash and B the lower sash, of which C C' are
respectively the meeting rails.
Dis a key having a stem E and a shank F.
Gis a locking lug extending at right angles from the shank. His a key plato
which is provided with suitable apertures for securing screws and also with an
aperture adapted to permit the insertion of the key shank and lug, and so
constructed that when the key is turned from its entering position it will be locked
therein.
Instead of using the key plate H where there is no center rail we may use a koy
plate such as shown at J in Fig. 5, comprising a socket and a base plate K
secured to the upper face of the mecting rails C of the upper sash. Tho stem E
of the key is provided with a wing L having a curved or cam shaped bearing
face L' at its lower edge, the wing L and the Ing G projecting at right angles to
each other from the axis of the key.
engage
Mis a rail plate secured on the upper face of the meeting rail C' of the sash and
against which the curved bearing L'of the wing L is adapted to to force
the two sashes tightly to their closed position, and lock the koy tightly in its
position.
This plate is preferably provided also with a locking lug N having the curved
or cam shaped bearing O on its outer face against which the inner face of the
wing L is adapted to engage, when turned to its locked position, whereby the two
meeting rails will be drawn together to prevent rattling thereof.
I preferably employ a series of key plates, such as H arranging them on the

page_text: sash in vertical series, as shown in Fig. 1, so that the key may be inserted in any
of these plates, and the sash opened more or less for ventilating purposes, at the
same time as the key enters the upper sash and projects across the path of the
lower sash the sash will be prevented from further opening.
If desired the wearing plate M may be entirely dispensed with or the lug N
may be omitted and the groove may be cut in the top of the sash as shown in
Fig. 6.
By arranging the wing L at right angles to the locking lug G as soon as the
key is engaged in the plate, the woight of the wing will tond to turn the key to its
locked position and any jar or shaking of the window will not effect it.
It is obvious with our construction when the key is in position to allow of a
partial opening of the window that either sash may be moved independently of the
other without moving the koy.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed as communicated to
me by my foreign correspondent I declare that what I claim is :-
1. In a sash fastener, the combination of the upper sash having a key plate, n
detachable key having means for securing it in said plate, and a stem extending
over the lower sash, a wing on said stem having a curved bearing and a wearing
plate on the meeting rail of the lower sash against which said wing is adapted to
bear, substantially as described.
2. In a sash fastener, the combination of the upper sash having a vertical sorios
of key plates, a detachablo key having means for securing it in said plate, and n
stem extending over the lower sash, a wing on said stem having a curved bearing,
a wearing plate on the mooting rail of the lower sash, against which the curva
bearing is adapted to be turned and a cam shaped lug on the wearing plato
against which the side of the wing bears to draw the meeting rails together, sub-
stantially as described.
3. In a sash fastener, the combination of a key plate in the upper window sash,
a detachable key adapted to ongage therein, a locking lug on said key, and a wing
on the stem at right angles to the lug, whoroby the wing normally tends to turn
the key by gravity to its locked position, substantially as described.
1.
Dated this 1st day of February 1893.