IMPROVEMENTS IN SASH FASTENERS
Year: 1877

page_text: LETTERS PATENT to Nathan Thompson, of Brooklyn, in the County of
King's, and State of New York, in the United States of America, but at
present of 23, Southampton Buildings, in the County of Middlesex, for the
Invention of "IMPROVEMENTS IN SASH FASTENERS."
Sealed the 8th September 1877, and dated the 7th June 1877.
PROVISIONAL SPECIFICATION left by the said Nathan Thompson at the
Office of the Commissioners of Patents on the 7th June 1877.
NATHAN THOMPSON, of Brooklyn, in the County of King's, and State of New
York, in the United States of America, but at present of 23, Southampton
Buildings, in the County of Middlesex. * "IMPROVEMENTS IN SASH FASTENERS."
The Invention has for its object improvements in that description of sash fasteners
described in the Specification of former Letters Patent granted to me dated May 16,
1876, No. 2060.
According to my present Invention, instead of employing a sliding spring catch
to secure or lock the two parts of the sash fastener together, I dispense with such
sliding spring catch, and employ in lieu thereof a lever catch, hinged or pin-jointed
to the lever part of the sash fastening, which by its own weight, or by the action
of a spring, is caused to take under the front edge of that part of the sash fastening
which is fixed to the top rail of the lower sash. The tail of such pin-jointed lever
catch forms a thumb piece, to enable the parts to be unlocked when it is desired to
open the window.
4
In some cases I pin-joint to the lever a stop or bolt, one end of which by falling
against the lever catch securely locks the same, whilst it can be unlocked by means
of a tail piece of the stop or bolt extending over the forward end of the lever.
When the sash fastener is placed in an elevated or inaccessible position, I connect
to the pin-jointed lever catch a cord or chain, which is passed over a pulley to enable
the sash fastening to be readily unfastened when required, and I connect another
cord or chain to the lever part of the sash fastening to enable the same to be readily
locked or fastened.

page_text: In some cases I pin-joint to the lever ca stop or bolt c. as represented at
Figures 1, 2, 3, one end of which by falling against the lever catch c, as shown at
Figure 1, securely locks the same, whilst it can be unlocked by means of a tail piece
of the stop or bolt c', extending over the forward end of the lever c.
When the sash fastener is placed in an elevated or inaccessible position I dispense
with the stop or catch c, and connect to the lever catch c² a cord or chain f, which
is passed over a pulley (not shown), to enable the sash fastening to be readily
unfastened when required, and I connect another cord or chain g to the lever c to
enable the same to be readily locked or fastened, or a single cord may be used for
locking and unlocking the fastening by making two knots or stops thereon, one to
act on the lever c, the other to act on the lever catch c³.
Having thus described the nature of my said Invention, and the mode in which
I carry the same into effect, I would have it understood that what I claim is the
addition to or combination with sash fasteners of the character herein described of
lever catches c, and stops or catches c, in manner and for the purpose substantially
as herein shewn and described.
In witness whereof, I, the said Nathan Thompson, have hereunto set my
hand and seal, this Twenty-ninth day of November, in the year of our
Lord One thousand eight hundred and seventy-seven.