SAFELY FASTENING WINDOW SASHES
Year: 1852

page_text: PROVISIONAL SPECIFICATION left by John William Couchman
at the Office of the Commissioners of Patents, with his Petition,
on the 23rd December 1852.
(Void by reason of notice to proceed not having been given within
the time prescribed by the Act.)
I, JOHN WILLIAM COUCHMAN, of 8, Princes Terrace, Pultney
Street, Barnsbury Road, do hereby declare the nature of the said
Invention for "SAFELY FASTENING WINDOW SASHES" to be as follows,
and shown on Drawings, to which this Specification has reference :-
Fig. 1. The part a, is fixed on the face of the cill of the sash
frame inside the room, and the crank 6 (attached to the thumb
piece 6), working through a cylindrical box attached to a (in
which is placed a spiral spring for the purpose of forcing back the
crank so as to make the thumb piece b, fair with the face of a), is
let into a mortice from the said face of cill.
The part c, to which is attached d, holding the catch e, is let in
from the top of the cill immediately under the bottom sash, so that
c, shall be fair with such surface of the cill. The pin attached to c,
drops into the crank b, and thus subjects the catch e, to the motion
produced by the finger pressing on the thumb piece b.
The plate C, to the right of the latter, shows the plan of the top

page_text: of C, and E. The figure under the same shows the elevation of C,
and E, as it would appear in the mortice from the outside of the
window.
The Figure E, by the side of the last mentioned, shows the side
clevation of the catch E, with the hole for axle and pin for motion.
The Figure f, to which is attached the catch g, is fixed on the
under side of bottom rail of bottom sash immediately over the plate
C, and catch E; and the action of the said spring upon the said
crank b, admits of the catch g, pushing back the catch e, and at
once closing the one on the other, and thus fastening the sash,
which is again released by pressing the finger on the thumb picce b.
The figure to the left shows the side elevation of f, and g.
Fig. 2. The part 1, through which works the bolt 2, and the
lever 3 (with the small wheel 4, in a cut at its end), is fixed on the
pulley style of sash frame at a point level with the meeting rails
of sashes with the bolt 2, on the side next top sash, and the lever
3, on the side next the bottom sash. This figure shows the front
elevation, and the figure to the right the back of the same, to which
are attached the parts 7, 7, for the axle 6, to work through; 5, is a
lever passing through a slot hole in the bolt 2, as shewn and fixed
to axle 6; 9, is a pin also fixed to axle 6, as also is the lever 3;
8, is a piece of vulcanized india rubber screwed to part 7.
The figure to the left under the last mentioned Figures 1, shews
the side elevation of the same.
The Figure 10, with a circular hole in the same, is a plate which
is fixed on the edge of style of top sash, into which the bolt 2,
works.
The Figure 11, is a catch which is fixed on the meeting rail of
bottom sash next the lever 3, so that the top is fair with the top
surface of such rail, and the end with the point of rounded guide
are fair with the edge of the style of the sash. The Figure 11, to
the right of the before mentioned 11, is the end elevation. of the
same; and the figure under is the top of the same.
When both the sashes are shut, the bolt 2, is inserted in the plate

page_text: 10, and the lever 3, is in contact with the under side of catch 11,
holding the bolt 2, firm in its position.
To unfasten the top sash, the bottom sash must be raised as high
as the length from top of Figure 11, to point of guide; that is, about
an inch (by this act the lever 3, is raised, and the bolt 2, is drawn
back); the top sash is then drawn down any distance beyond the
length from top of hole in Plate 10, to top of said plate. The bottom
sash is then again closed, and the top sash having the edge of the
style grooved above Plate 10, to prevent the bolt which shoots
forward from interfering with its freedom in working up and down,
is at liberty.
To close the top sash, the bottom is again raised as before stated;
the top sash being then closed, and the bottom one shut, both arc
securely fastened.
The bottom sash can also be raised to any height without inter-
fering with the top sash. The piece of india rubber 8, Figure 2,
acts as a spring, upon which the pin 9, strikes, and while allowing
the lever 3, to be forced back by the edge of the style of bottom
sash in moving up and down, is sufficient to move it forward far
enough for the catch 11, to have its proper effect upon it at the
point where the guide admits of the lever being protruded.
The materials of the different parts of Figures 1, and 2 (except
the part 8), to be composed of either brass or iron.