Improvements in the Locks of Window-sashes.
Year: 1891

page_text: Date of Application, 2nd May, 1891
Complete Specification Left, 29th Feb., 1892-Accepted, 2nd Apr., 1892
PROVISIONAL SPECIFICATION.
Improvements in the Locks of Window-sashes.
1, FRANCIS JOSEPH JAMES GIBBONS, of St. John's Works, Church Lane,
Wolverhampton, in the County of Stafford, Lock Manufacturer, do hereby declare
the nature of this invention to be as follows:-
My invention relates to improvements in the locks of window sashes, and consists
more particularly in the combination with the lock proper of devices by which the
key is locked in its lock until the sashes themselves are locked in the desired
position by the protrusion of the lock-bolt, and also of an indicating device by means
of which it is rendered impossible for the lock to be left unlocked without the
indicator shewing it.
The lock itself has a bolt consisting of two parts pivotted together at an angle.
The operative nose of the bolt is pivotted to one part and the end of the other
part is screwed, its thread being engaged by a socket rotatable in the lock-case by
an external webless key which fits upon a square on the socket.
In carrying out the first part of my invention, I form a circular groove near the
end of the key, and provide a finger which is connected with the screw-gear inside
the lock in such a way that when the lock is locked, it will stand clear, but that
the act of unlocking will cau-e the finger to engage in the said groove and thereby
lock the key in the lock from which it can only be withdrawn after the bolt has
been shot.
In carrying the second part of my invention into effect, I provide a rotary plate
and an indicating hole in front of the lock. The rotation of the key in the act
of locking, sets the said rotary plate in motion so that the lock cannot be left
unlocked without the indicator shewing the fact. I do not confine myself to the
particular type of the intermediate mechanisms between the square protruding
through the lock-case and the indicator. A convenient mechanism is pins pro-
jecting from the side of the square engaging in slots or grooves in a collar rotatable
in the plate of the indicator box and connected by toothed gearing with the rotating
indicator plate.
Dated this 2nd day of May 1891.
PHILLIPS & LEIGH,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Locks of Window-sashes.
I, FRANCIS JOSEPH JAMES GIBBONS, of St. John's Works, Church Lane,
Wolverhampton, in the County of Stafford, 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 :-
My invention relates to improvements in the locks of window sashes, and consists
in the combination with the lock proper of devices by which either the relative
position of the bolt of the lock of the window sash is automatically indicated
or the key remains locked in the lock until the sashes themselves are locked.
In order that my invention and the means by which it is to be carried into
practical effect, may be thoroughly understood, I will now describe them in detail,
referring in so doing to the accompanying drawings which are to be taken as part
of this Specification and read therewith.

page_text: Fig. 1 is a front elevation or a pair or sashes and the side frame illustrating one
modification of my invention.
Fig. 2 is a vertical section taken on the line A-B of Fig. 1.
Fig. 3 is a sectional plan taken on the line C-D of Fig. 1.
Fig. 4 is a side elevation of the pair of sashes standing in their closed position.
Fig. 5 is a side elevation of a modified form of device for locking the key in the
sash lock.
Referring to Figs. 1, 2, 3 and 4, a is the top and the bottom sash.
d arc
the staples on the top and bottom sashes respectively. Each one has a recess e
into which the bolt of the sash-lock hereinafter described enters for the purpose of
locking the sashes in their closed positions, and besides these recesses, there are
others e¹ of any convenient length, which dimension limits, after the bolt has
been locked into the respective recess, the travel of the sash up or down.
e2 is the bolt of the sash-lock. It is pivotted at f. g is a screw pivotted to the
bolt at h. i is a sleeve threaded internally so as to engage with the screw; and is
a square on the end of the sleeve. A suitable key fitting on the square is provided
for turning the screw in either direction. k is a pin fixed transversely through the
square and therefore producing a pair of projections. is a nipple. It is notched
for the purpose of adapting it to engage the said projections. I do not confine
myself to any particular method of establishing and maintaining an engagement
between the nipple and the sleeve. m is a wheel gear by which the motion of the
screw is transmitted to an indicator n which is therefore moved in the vertical
plane in either direction. o is a sight hole at which the indicator presents such a
word as "locked" or "unlocked," "open or "shut" for the purpose of visibly
declaring the operative position of the bolt of the lock. It is a matter of
indifference what pair of words is used provided that they are the converse of each
other. Fig. 3 shews the lock bolt as locked into the staple, the indicator at the
same time presenting the word "locked" at the sight-hole-see Fig. 1.
"
P is the usual stepped bar on the side of the top sash, and p the spring detent
adapted to engage therein. The usual cords for disengaging it and for raising or
lowering the top sash are provided.
Referring to Fig. 5, the modification illustrated therein consists in replacing the
indicator above described by the combination of a pivotted finger in the lock and
a collar on the key. When the key is used to unlock the lock, the finger engages
behind the collar and cannot be disengaged until the bolt has been locked into its
staple. e³ is an internally threaded sleeve pivotted to the bolt e² in the same way
as the screw g illustrated in Fig. 3. g is a screw working in the sleeve. is a
square on the outer end of it to receive the key 2. 3 is a finger pivotted at j.
1 is a collar on the key. As the key is turned into the lock in the act of unlocking,
the collar on the sleeve bears against the pivotted finger and rocks it over with
the result that its opposite and operative end is brought down behind the
collar. The act of unlocking pushes the sleeve away from the finger and the
operative end above mentioned is moved away from the collar by the time that
the locking is effected but not before.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1. The combination in a sash lock, of bolt, screw pivotted thereto, sleeve engaging
with the said screw, key and indicator, as set forth.
2. The combination in a sash-lock of bolt, key, screw, connection between them,
and a pivotted finger adapted to hold the key in the lock during the act of
unlocking and to release it when the act of locking has been accomplished, as
set forth.
3. The combination with the key and bolt of a sash lock of devices for indicating
the position of the bolt either by the presentation of a word at a sight-hole or by

page_text: an automatic engagement of the key by the lock, as set forth with reference to the
accompanying drawings.
Dated this 29th day of February 1892.
PHILLIPS & LEIGH,
Agents for the Applicant.