Improvements in Sash Fasteners
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in Sash Fasteners
I, FREDERIC ALGAR, of 7 and 8, Waterbeer Street, Exeter, in the County of
Devon, Iron Merchant, do hereby declare the nature of this invention to be as
follows:-
This invention relates to an improved sash fastener which is adapted not
only to fix the sashes one to the other to prevent them being opened, but also
jams the sashes against the sash frames and so prevent them rattling, the con-
struction being such that it is impossible for the fastener to be forced back by a
knife or equivalent device from the outside.
My invention consists essentially of a lever adapted to be pivotted to one
of the sashes and carrying a cam-shaped piece adapted to bear against and
engage with an hooked-shaped piece fixed to or carried by the other sash, the
construction being such that if the lever is turned in one direction the cam-
shaped piece is disengaged from the hooked-shaped piece and if turned in the
other direction it engages therewith, forcing the two sashes apart until they
firmly bed against the sash frame; the hook-shaped piece so engaging with the
cam-shaped piece that one sash cannot be lifted with respect to the other.
To prevent the lever being forced back by a knife or other similar article from
the outside, a stub or short arm is formed on or mounted on one of the sashes
so that it projects or lies over the other sash.
D
1011 1
1000
Improvements in Sash Fasteners.
I, FREDERIC ALGAR, of 7 and 8, Waterbeer Street, Exeter, in the County of
Devon, Iron Merchant, 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 relates to an improved sash fastener which is adapted not
only to fix the sashes one to the other to prevent them being opened, but also
jams the sashes against the sash frames and so prevents them rattling, the con-
struction being such that it is impossible for the fastener to be forced back by a
knife or equivalent device from the outside.

page_text: I will now particularly describe my invention making reference to the accom-
panying drawings in which;
-
Figure 1 is a view in plan of a fastener constructed according to this invention,
in an open or unfastened position.
Figure 2 is a similar view showing the fastener closed or fastened.
Figure 3 is an end view of Figure 1, and
Figure 4 is a section on line x-x of Figure 1.
Throughout the views similar parts are marked with like letters of reference.
My invention consists essentially of a lever A adapted to be pivotted at a
to a foundation plate A' which is fixed to one of the sashes X. This lever A
carries a cam-shaped piece a adapted to bear against and engage with an
hooked-shaped piece B fixed to or carried by the other sash X', the construction
being such that if the lever A is turned in one direction (see Figure 1) the
cam-shaped piece al is disengaged from the hooked-shaped piece B and if turned
in the other direction (see Figure 2) it engages therewith, forcing the two
sashes X, X', apart, as shown, until they firmly bed against the sash frame; the
hook-shaped piece B so engaging with the cam-shaped piece a¹ that one sash
cannot be lifted with respect to the other.
The cam shaped piece al preferably tapers towards the edge which first
engages the hook shaped piece B or is wedge-shaped as shown.
The foundation plate A to which the lever A is pivotted preferably in the
manner clearly shown by Figure 4-may be provided with stops a² and a for
limiting the movement of the lever A.
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:
(1) The improved sash fastener, constructed, arranged and adapted to operate
substantially as herein before described and shown.
(2) A sash fastener consisting essentially of a lever adapted to be pivotted
to one of the sashes and carrying a cam shaped piece adapted to bear against
and engage with a hooked shaped piece fixed to the other sash, the construction
being such that the two sashes are forced apart against the frames when the
fastener is in a closed position, as set forth.
Dated this 29th day of August 1899
ROBERT E. PHILLIPS, Assoc.M. Inst.C.E., M.I.Mech. E.,
Chartered Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.