Improvements in Window Sash Locks and Lifts Combined.
Year: 1894

page_text: Date of Application. 20th Apr.. 1894-Accepted, 11th Aug., 1894.
COMPLETE SPECIFICATION.
Improvements in Window Sash Locks and Lifts Combined.
We, SAMUEL EDMOUR ST. ONGE CHAPLEAU, of Russell Hotel in the City
of Ottawa, Canada, Gentleman, JOHN NAPIER FULTON, Manufacturer, and
FRANCOIS HURTUBISE, Bookkeeper, both of 587 Craig Street in the City of
Montreal, Province of Quebec, Canada, do hereby declare the nature of our said
invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
The aim of our invention is to provide a simple and efficient lock for locking
window sashes, in order to render that duty independent of the carelessness of
servants or other persons entrusted with it.
To this end, our invention consists in a self locking lock being attached to each
sash of the window to interlock with a striking plate bolt, fastened to the frame of
the window, the moment it is brought in contact with it.
It will be noticed that one of the locks, (the lower sash one) is provided with a
lift, which serves the double purpose of unlocking the lock and at the same time
lifting up the sash. The other lock (the upper sash one) instead of a lift is
provided with a hole in its face to perinit the insertion into it of a bent iron hook
to pull down the sash this bent hook serves the same purposes exactly which the
lift does on the lower sash lock: that is, it unlocks the lock at the same time that
it pulls down the sash. That lock is made flush with the front of the sash bar to
permit the latter to clear the bars of the lower sash when pulled down past it for
cleaning or other purposes.
In the accompanying drawings,
Fig. 1 is a rear view of an upper sash lock with the back plate removed to show
the working parts interlocked with the striking plate bolt.
Fig. 2 is the back plate.
Fig. 3 is a front view of the lock.
Fig. 4 is a side view of the lock.
Fig. 5 is an iron hook at the end of the wooden rod with which to unlock
the lock.
Fig. 6 is a rear view of a lower sash lock with the back plate removed and
showing the working parts interlocked with the striking plate bolt.
Fig. 7 is a front view of the lock with the lift attached.
Fig. 8 is a cross sectional view of the lock complete without the striking plate.
Fig. 9 is a side view of the lift and lift plate.
In Fig. 1a is the rim or casing of the lock made cup shape, in which the
working parts are held; 66 are the jaws revolving on the jaw pins c c which are
cast solid to the casing, c¹ is a rest cast on the casing common to both jaws; d is a
horse shoe shaped spring common to both jaws, and which, while allowing the jaws
to open, tends constantly to close them up; e is an opening cut through the front
part of the casing of the lock, (in other words the key hole) f is a flat pointed spur
cast solid to the casing of the lock, which is driven in the wood of the sash when
the lock is forced in its seat and helps holding it into position; g is an opening in
the rim, at the top of the lock, to allow the bolt of the striking plate to enter into
and engage with the jaws of the lock, and is the striking plate and bolt.
In Fig. 2, is the back plate of the lock, ii are two openings through which the
jaw pins project to permit of their being riveted, while e' is an opening cut through
the plate similar to that in the front part of the casing of the lock and for the same
purpose.
In Fig. 3, a is the casing of the lock, bare the aws, e the key hole and the
flat pointed spur.

page_text: In Fig. 4 a is the casing of the lock, is the flat pointed spur, is the back
plate kept in position by the riveted ends of the jaw pins c and the notched
recess k cut into the projection of the side or rim of the lock casing.
In Fig. 5, is a wooden rod and m an iron bent pin or hook, which is in reality
the key of the lock, for it will readily be seen that when it is inserted in the key
hole (Fig. 3) and forced downwards against the bevelled sides of the jaws it will
cause the latter to open, thereby disengaging them from the bolt of the striking
plate and allowing the sash to be pulled down on pushing the sash up to the top
of the window it will lock itself.
In Fig. 6, which is an almost exact reproduction of Fig. 1, but reversed, a is the
casing of the lock, bb are the jaws pivoted on the jaw pins c c, d is the spring.
e e are oblong openings (corresponding to e in Fig. 1) cut through the front part
of the casing of the lock, to allow the posts or rivets 99 which unite the lift plate p
to the sash lift p (see Fig. 9) to move up and down as desired; is the flat pointed
spur, g is the opening in the rim of the lock through which the bolt of the striking
plate enters into the lock, p is the lift plate which moves up and down inside of the
lock, between the front part of the casing and the jaws, while p' is the sash lift
proper moving outside of the lock but in unison with the plate by the agency of
the posts or rivets q 9 (see Fig. 7) which projects through the openings e e in the
casing of the lock; r is a post or stud cast solid to the back of the lift plate, or in
other words the key of the lock.
In Fig. 7, a is the casing of the lock, p¹ is the sash lift and qy are the rivets.
In Fig. 8 a is the casing of the lock, b the jaw, e the jaw pivot or pin, d the
spring, e the upper oblong opening in the casing, f the spur, the striking plate
bolt opening, the back plate, is the lift plate, p' the sash lift proper; 99 are
posts or rivets cast solid on the front of the lift plate while ris a post or stud also
cast solid to the back of it, the latter passing between and resting against the
bevelled inside edges of the jaws and projecting through the back plate by means
of an oblong opening cut into it similar to e in the front part of the casing.
In Fig. 9, p is the lift plate, pl is the sash lift, 9 g are the rivets or posts which
unite the lift with the lift plate, and r is a stud or post cast solid on the lift plate
which in reality is the key of the lock.
It will be seen that when bearing upwards on the sash lift, the lift plate will
slide up until the rivets reach the top of the openings e e and in so doing the stud r
will be pressed against the inside bevelled edges of the jaws forcing them apart
thereby disengaging them from the bolt of the striking plate and allowing the sash
to be raised. Upon releasing the sash lift it will return to its original position
partly by gravitation and by the action of the spring d pressing the jaws inwardly
and forcing the stud » (or key) back to its proper place. Upon pulling the sash
down to the window sill, it will lock itself.
It may be desirable sometime to do away with the striking plate bolt g¹ on the
window sill, in that case a striking plate flush with the sill, such as represented by
Fig. 10, provided with two openings n n will answer the purpose: but in order to
use such a plate, the jaws of the lock bb must be made to project far enough out
of the casing of the lock, to interlock with said striking plate. It is hardly
necessary to add that this lock can be made and worked with one single jaw
instead of two. The upper sash lock, is attached to the top bar of the sash, and
the striking plate to the top of the window frame. The lower sash lock is attached
to the bottom bar of the sash and the striking plate to the sill of the window.
The lock is shaped round at one end preferably to square, it being much easier to
cut its seat with a brace and bit of the proper size and a better joint is thus
obtained.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is :-
1. In an automatic sash lock, the casing, (or base plate provided with a rim,)

page_text: Jaw pins, rest and spur integrally cast, and having spring jaws and a spring common
to both jaws.
2. In an automatic sash lock with integral rim or case having projections with
under notched recesses k, a back plate with corresponding shoulders, spring-jaw
pin-holes.
3. In an automatic sash lock with base plate and jaw pins integrally cast, a rim,.
and a rest common to both jaws.
4. In an automatic sash lock, spring jaws with inside bevelled edges to allow a.
key to actuate them.
5. In an automatic sash lock with base and back plates, an opening or key, hole
cut through one or both of them to receive a key.
6. In an automatic sash lock, a sash lift actuating a key and a lift-plate with
posts or studs cast integrally.
7. In an automatic sash lock a sash lift key and studs, in combination with a.
lift plate.
8. In an automatic sash lock, a base plate having an integral rim, jaw pins,.
spring jaws, rest, spring, spur and back plate, in combination with a striking
plate-bolt.
9. In an automatic sash lock, a base plate with a rim, and having oblong
apertures and provided with spring jaws, spring, rest and back plate, in combination
with a key on lift plate, a sash lift and a striking-plate-bolt.
10. In an automatic sash lock, a sash lift provided with a key on a lift-plate.
11. In an automatic sash lock, a sash lift provided with a key on a lift-plate, in
combination with spring jaws, spring and base plate.
12. In an automatic sash lock, a sash lift provided with a lift-plate and studs.
13. In an automatic sash lock, a key and a sash lift combined with studs and
lift-plate.
14. In an automatic sash lock, spring jaws actuated by a key in combination
with a lift-plate and integral studs and a sash lift substantially as described and
shewn.
Dated 20th
Dated 90th A
1004
GEO. DOWNING,
8, Quality Court, London, W.C., Agent..