IMPROVEMENTS IN SASH FASTENERS
Year: 1866

page_text: PROVISIONAL SPECIFICATION left by Josiah Adams at the Office of the
Commissioners of Patents, with, bis Petition, on the 16th April 1866.
I, JOSIAH ADAMS, of Birmingham, in the County of Warwick, Manufacturer,
do hereby declare the nature of the said Invention for "IMPROVEMENTS IN SASH
FASTENERS," to be as follows:
My Invention consists of the arrangements or combinations, herein-after
described, of the parts of sash fasteners whereby great security and simplicity
are obtained. The said sash fasteners consist of two parts connected respect-
ively to the two sashes to be fastened together. One of the said parts consists
essentially of a bolt, and the other of a staple for fixing the bolt. The said
bolt part and staple part are constructed as follows:-
The stem of the bolt slides in a frame or case fixed on the inner sash,
and is pressed from the outer sash when at liberty to move by a coiled
spring in the said frame or case. The said bolt has a motion of partial
rotation in addition to the sliding motion, and carries on its outer end a handle
by which it can be made to slide and may also be rotated. The inner end of the
stem of the bolt carries a small cam or tongue which when the bolt is pressed
forward overhangs the outer sash, but which when the bolt is not pressed is
brought by the spring over the inner sash. The inner face of the said cam
or tongue is inclined. The staple part of the fastener consists of a plate
carrying a vertical projection, behind which the cam or tongue of the bolt can
be made to engage by pressing forward the bolt and giving a motion of partial
rotation thereto. The acting side of the said projection is inclined, and by
the working of the inclined face of the cam or tongue against the said inclined

page_text: projection a wedging action is obtained. In fastening the window sashes by
the fastener described the bolt is pressed forward by its handle and partially
turned, the cam or tongue on the end of the bolt engaging behind the inclined
projection on the staple. The sashes are thereby fastened and drawn closely
together. In order to guide and firmly support the bolt during the fastening
of the sashes, as well as to prevent the vertical motion of the sashes, I fix
upon the staple plate an upright carrying a conical peg or centre immediately
opposite the end of the bolt, and I make in the end of the bolt a conical hole.
When the bolt is pressed forward the fixed centre on the staple plate enters
the hole in the end of the bolt and guides and supports it while completing its
sliding and performing its rotatory motions, and at the same time prevents
the vertical motion of the sashes. Instead of making the cam or tongue
engage behind a vertical projection on the staple plate it may be made to
engage behind an inclined horizontal rib or plate on the staple plate, or in an
inclined slot in the staple plate. In place of the centre described for guiding
and supporting the bolt a covering plate, against which the upper side of the
bolt may bear and be supported in its motion, may be employed. Instead of
employing one cam or tongue at the end of the bolt and one fixed projection
on the staple plate, two of the said cams or tongues and fixed projections may
be employed. In this case the end of the bolt has the figure of the letter T.