An Improved Bolt for Doors, Cupboards, and the like.
Year: 1893

page_text: Date of Application, 14th Apr., 1893
Complete Specification Left, 22nd Nov., 1893-Accepted, 23rd Dec.. 1893
PROVISIONAL SPECIFICATION.
An Improved Bolt for Doors, Cupboards, and the like.
I WILLIAM ERNEST MONRO, of Charlcotte, Abbeville Road, Balham, S.W.
do hereby declare the nature of this invention to be as follows:-
This invention relates to an improved boli for doors, cupboards and the like and
consists of an ordinary cylindrical metal case for holding the said bolt which case
is fixed to the door by screws in the usual manner. The rear end of the said
cylindrical case is formed with an inclined or curved slot through which the handle
connected to the sliding bolt projects, one end of the said slot being curved upwards
and the other downwards thus preventing the bolt being shot backwards or
forwards until the handle is turned upwards or downwards for the purpose of
unlocking or locking the door, the shank of the handle travelling along the inclined
slot when unlocking or locking the sliding bolt. A flat spring may be fixed to the
back of the metal case, so as to bear against the bolt and prevent it shifting from its
locked or unlocked positions.
By means of this invention the simple act of turning the handle up or down
unlocks or locks the said bolt by reason of the shank of the handle being forced to
travel along the aforesaid inclined or curved slot, and the said cylindrical case may
be formed or stamped out of a single piece of metal.
Dated this 11th dow of Anil 1902
F. G. CASSELL,
Of Cassell & Co.,
22, Glasshouse Street, Regent Street, London, W.,
Agent for the Applicant.
COMPLETE SPECIFICATION.
An Improved Bolt for Doors, Cupboards, and the like.
I, WILLIAM ERNEST MONRO of Charlcotte Abbeville Road Balham, S.W.
Gentleman, 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 a new or improved bolt for doors cupboards and the like
and consists of an ordinary cylindrical metal case for holding the said bolt which
case is fixed to the door by screws in the usual manner. The rear end of the metal
case is formed with a curved or inclined slot through which the handle connected
to the sliding bolt projects, one end of the said slot being curved upwards and the
other downwards, thus preventing the bolt being shot backwards or forwards until
the handle is turned upwards or downwards for the purpose of locking or unlocking
the door, the shank of the handle travelling along the inclined slot when locking
or unlocking the sliding bolt. A. flat spring is fixed to the back of the metal case
so as to bear against the bolt and prevent it shifting from its locked or unlocked
position. By means of this invention the simple act of turning the handle up or
down unlocks or locks the said bolt by reason of the shank of the handle being
forced to travel along the aforementioned inclined or curved slot. The said
cylindrical case may be stamped out of one piece of metal.
In order that my invention may be more fully understood, I will now proceed to
describe same with reference to the accompanying drawings in which
Fig. 1 is a plan of my improved bolt, Fig. 2 is a side view and Fig. 3 is an
underside view of same,

page_text: Fig. 4 is a view of the bolt removed from the casing.
Like letters of reference indicate corresponding parts throughout the drawings.
My improved bolt consists of the base plate p by means of which the bolt is
secured in position by screws in the ordinary manner, the said plate being furnished
with a cylindrical metal case a containing the bolt b.
The rear end of the metal case is furnished with a curved or inclined slot s
through which passes the handle h attached to the sliding bolt. The said bolt is
furnished with two flats c d (Fig. 4) one on either side, against which the spring sl
bears, in order to prevent the bolt from shifting from its locked or unlocked
position.
My improved bolt is operated by raising or lowering the handle / which causes
the bolt to travel backwards or forwards, owing to the shank of the handle h being
-compelled to move along the inclined slot s, and it is obvious that the throw of the
bolt can be regulated as desired according to the inclination given to this slot.
In order to prevent the bolt from being operated by simply pushing the handle
back, the lower ends of the slots are cut square as shown at 9 (Fig. 2) so that it is
impossible to operate the bolt without raising the handle.
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. In bolts for doors, cupboards, and the like, the curved or inclined slot s,
substantially as described and shown and for the purpose specified.
2. In bolts for doors, cupboards, and the like, the curved or inclined slot s
provided with square cut ends q, in combination with the bolt furnished with
flats cd, and the spring s¹, substantially as herein described and shown and for the
purpose specified.
3. The new or improved bolt for doors, cupboards, and the like, arranged,
constructed, and operating, substantially as herein described and shown, and for the
purpose set forth.
Dated this 17th day of November 1902
F. G. CASSELL,
Of Cassell & Co.,
22, Glasshouse Street, Regent Street, London, W.,
Agent for the Applicant.