IMPROVEMENTS IN SASH FASTENERS
Year: 1876

page_text: LETTERS PATENT to Nathan Thompson, of the City of Brooklyn, 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 21st July 1876, and dated the 16th May 1876.
PROVISIONAL SPECIFICATION left by the said Nathan Thompson at the
Office of the Commissioners of Patents on the 16th May 1876.
NATHAN THOMPSON, of the City of Brooklyn, 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 sash fasteners.
For this purpose I form the fastener in two parts, one of which is fixed to the
lower bar of the upper sash, and the other to the upper bar of the lower sash as
heretofore.
According to my Invention, however, I form one part thereof with a hinged
lever, the knuckle of which is formed with flat sides which, by the aid of a spring,
act to keep the said lever either in a vertical or horizontal position. The outer
end of the said lever is formed with a slot, which is so arr inged as to permit a
sliding catch on the other part of the fastener to pass therethrough when he lever
is pressed down into a horizontal position, then by sliding the caid catch it is
caused to pass over the metal at the end of the slot and thereby securely hold the
two parts together.
The lever is formed to act in combination with a projection or fulcrum on the
other part of the fastener in such manner as to ensure the proper closing of tho
sashes by the simple depression of the lever.
If desired the sliding catch may bo made self-acting to lock the parts together.

page_text: Figure I is a side view of a sash fastener constructed according to my Invention
and showing it applied to the upper and lower bars of two sashes. Figure 2 is a
section on the line 1, 1, of Figure 4, Figure 3 is an end view, and Figure 4 is a plan
of the same, and Figure 5 is an under side view of the sash fastener shown separate
from the sashes.
A represents the lower bar of the upper sash, and B represents the upper bar of
the lower sash. The part a of the sash fastener which is fixed to the sash bar A is
provided with lugs or cars b to which is pin-jointed a lever c, the knuckle of which
is formed with flat sides which, by the aid of a spring d, act to keep the lever c either
in a vertical or horizontal position. The outer end of the lever c is formed with a
slot c¹, which is so arranged as to permit a sliding catch c on the other part of the
fastener to pass therethrough when the lever c is pressed down into a horizontal
position, then by sliding the catch e by hand, or as shown in the Drawings,
by the action of the spring 7 thereon, the catch e is caused to pass over the
metal at the end of the slot c¹ and thereby securely hold the two parts a and f
of the fastener together. The part of the fastener is fixed to the sash bar B,
and it is provided with a projection or fulcrum and the lever c is shaped
to act in combination with such fulcrum in such manner as to ensure the proper
closing of the sashes by the simple depression of the lover c even in the event of
the sashes being left open to the extent say of half an inch. The catch e is formed
to fit a slot in the part f, and a projection d' on such catch e passing underneath a
portion of the part facts to guide the catch c correctly and prevent its binding
in its guide.
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 I do not claim generally
the use of a hinged or pin-jointed lever on one part of a sash fastener to act in
combination with the other part of a sash fastener, but what I do claim is the use

page_text: of a hinged or pin-jointed lever c acting in combination with a spring d, sliding
catch e, and fulcrum fin manner and for the purpose substantially as herein shown
and described.
In witness whereof, I, the said Nathan Thompson, havo hereunto set my
hand and seal, this Thirteenth day of November, in the year of our Lord
One thousand eight hundred and seventy-six.
NATHAN THOMPSON. (L.B.)