An Improved Lock or Fastener for Securing Window Sashes.
Year: 1892

page_text: COMPLETE SPECIFICATION.
An Improved Lock or Fastener for Securing Window Sashes.
We, GEORGE SPARLING, Engineer, and FREDERICK CHARLES SOLOMON,
Engineer, both of Jersey Villa, Grafton Street, Woollhara, Sydney in. the
Colony of New South Wales, 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 :-
Two distinct features are embodied in this invention.
1st. An automatic lock
or fastener which is attached to the lower rail of the upper sash and 2nd a
peculiarly constructed plate which is attached to the upper rail of the lower
sash. The function of the plate is to draw the sashes together in the act of
locking and prevent rattling when locked.
By referring to the accompanying sheet of drawings the invention will be
more readily understood.
Fig. 1 is a side view shewing the sashes locked.
Fig. 2 is a plan view of the same.
Fig. 3 is a front elevation of the lock.
Fig. 4 is a detail vertical section taken on the line 1-2 of Fig. 3. In this
view the lock is shewn as it appears when the lower sash is locked or has been
raised.
Fig. 5 is a detail vertical section the same as Fig. 4 but shews the position of
the parts when unlocked and previous to the sash being raised.
Fig. 6 is a plan view of the plate that is secured to the rail of the lower sash.
Fig. 7 is a cross section of the same taken on the line 3-4 of Fig. 6.
A, is a hollow pillar or casing provided with a base plate A¹ by means of
which it is secured to the lower rail A³ of the upper sash. B is a stop or
tumbler pivotted at b to the pillar A. This stop B is contained within the
pillar A and its lower part caused to project through an opening b¹ formed in
the face of the pillar A. This is effected by means of a spring 6 (see particu-
larly Fig. 4). The upper extremity of the stop B carries a trigger C of peculiar
construction. The function of this trigger C is to retain the stop B in a
retreated position within the hollow casing in order to allow the lower sash to
be raised.
The trigger C consists of a metal bar which has two notches co' formed on
its underside (see Figs. 4 & 5). The upper extremity of the stop B engages
with the notch c. The trigger C is slid in and out through an opening a,
formed in the top of the pillar A according as the stop B is moved. When
the lower part of the stop B is pushed far enough inside the pillar A the
trigger C will be slid or pushed out through its opening a, the notch c¹ will
engage with the face of the pillar A (see Fig. 5) and will retain the stop B in
a withdrawn position. When in this position the lower sash D' may be raised.
The act of raising will cause the top rail D' of the lower sash to impinge upon
the projecting portion of the trigger C, lift it clear of the face of the casing A
and allow the lock to assume its normal position as shewn in Fig. 4.
unlocking is effected by pushing the stop B in with the finger. The act of lowering
the sash rail D¹ past the projecting stop B does not cause the stop to be sufficiently
retreated within the pillar A as to allow the notch c¹ to engage with the face of the
pillar A and retain the stop B. A plate D is secured to the top rail D' of the
fower sash. The plate D has arms d d the extremities of which are furnished
with lateral lugs df d¹. These lugs ď¹¹ engage behind projections E E, formed on
the sides of the pillar A. The projections E E are shaped as inclined planes. As
the lower sash is drawn down, the lugs d¹³ will engage with the inclined planes EE
ID 21
The

page_text: and cause the two sashes to be drawn close together and prevent the rattling of the
sashes.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. In locks or fasteners for window sashes a stop or tumbler, that rocks upon a
horizontal axis and which is provided with a spring, whereby the stop is caused to
project beyond the line of the upper sash rail, and prevent the lower sash from being
raised as herein specified.
2. In locks or fasteners for window sashes a pillar or standard that is provided
with a horizontally pivotted spring stop or tumbler and with a trigger or catch,
whereby the said stop or tumbler may be retained at will in a retreated or unlocked
position in order to allow the lower sash to be lifted as herein set forth.
3. In locks or fasteners for window sashes a pillar or standard that is provided
with a pivotted stop or tumbler, and trigger, and with inclined plane projections in
combination with a plate such as D, as and for the purposes herein set forth.
4. The general arrangement construction and combination of parts constituting
our improved lock or fastener for window sashes substantially as described as
illustrated in the drawings and for the purposes berein set forth..
Dated this 16th day of February 1892.
GEORGE SPARLING.
FREDERICK CHARLES SOLOMON.