IMPROVEMENTS IN WINDOW AND DOOR FASTENING BARS
Year: 1885

page_text: I, WILLIAM LEGGOTT of 23, Swaine Street, Bradford, in the County of York,
Ironmonger, do hereby declare the nature of my invention for "IMPROVEMENTS IN
WINDOW AND DOOR FASTENING BARS to be as follows:-
This invention relates to certain improvements in apparatus for securing window
casements, doors, and similar frames, and has for its object the arrangement of the
apparatus in such a manner so that in whatever position the lock bolt may be, the
same is locked and therefore cannot move or drop except when operated upon by
an attendant.
I accomplish my object in the following manner:-To the window sash or other
frame, I secure a bracket to which is mounted a worm and worm wheel so arranged
that the same may be operated by an endless cord or by a key. The worm wheel gears
into a toothed rack to which the lock bolt is, secured, so that when the worm and
worm wheel are actuated, the lock bolt slides in or out of the striking plate,
thereby securing or liberating the frame as desired. Or in lieu of the worm wheel
gearing with the toothed rack, I can accomplish my object by securing the said
wheel on a shaft, and forming or securing to the other end thereof a course pitched
screw, which engages with the lock bolt, so that on actuating the worm by an
endless cord or key, the shaft and screw revolve, thereby causing the lock bolt to
protrude into or be withdrawn from, the striking plate, according to the direction
in which the worm and worm wheel are actuated.
The interior of the striking plate and the end of the lock bolt, I form angular;
so that should the frame become twisted or warped, the lock bolt will enter the
interior or recess in the striking plate, without the attendant having to force the
frame until the lock bolt is exactly opposite the recess in the striking plate.
Disted thin à 1 1

page_text: Improvements in Window and Door Fastening Bars.
I, WILLIAM LEGGOTT, of 23 Swaine Street Bradford in the County of York,
Ironmonger do hereby declare the nature of this invention for IMPROVEMENTS IN
WINDOW AND DOOR FASTENING BARS and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
This invention relates to certain improvements in apparatus for securing window
casements, doors and similar frames, and has for its object, the arrangement of the
apparatus in such a manner so that in whatever position the lock bolt may be, the
same is locked and therefore cannot move or drop except when operated upon by
an attendant and consists in securing to the window-sash or other frame, a worm
and worm wheel, so arranged that they can be operated by an endless cord, or by
a key. The worm wheel works in a toothed rack to which is secured the lock bolt,
so that when the worm and worm wheel are actuated, the lock bolt slides in or out
of the striking plate, thereby securing or liberating the frame as desired. Or in
lieu of the worm wheel gearing with the toothed rack, I can accomplish my object
by securing the said wheel on to a shaft, and mounting to one or both ends thereof,
as the case may be, a course pitched screw, which engages itself with the lock bolt,
so that on actuating the worm by an endless cord or key, the shaft and screw
revolve, thereby causing the lock bolt to protrude into or be withdrawn from the
striking plate.
The interior of the striking plate and the end of the lock bolt I form angular, so
that should the frame become twisted, the lock bolt will enter the striking plate
without the attendant having to use any force to the frame to bring the lock bolt
opposite the recess in the striking plate.
In order that my invention may be better understood, I will further describe the
same by making reference to the accompanying drawing in which Fig. 1. represents
such portions of a door or other similar frame with my improved apparatus secured
thereto, as is necessary to illustrate my invention. Fig. 2 is a side elevation of
same with the lock bolt withdrawn. Fig. 3 is a detail shewing the side view of the
guide pullies. Figure is the front elevation with the front plates removed and
with the worm wheel secured to a shaft having a course pitched screw to one or
both.ends thereof. Fig. 5 is a vertical section through the striking plate and Fig. 6
a back view of the same.
.
To the framework A of the door or window casement, I secure bracket B to
which is mounted the worm C, worm wheel D, and horizontal grooved pulley E,
the worm wheel gearing into a rack G secured on the lock bolt F. Around the
pulley E running in the groove is an endless cord H for actuating the apparatus
and from the pulley E, the said cord passes over two grinding pullies K mounted
on a bracket J which may be secured in any convenient position at right angles to
the pulley E to bring the said cord into workable position and within reach of the
operator
Or in lieu of the rack G, I mount the worm wheel D on shaft M to which is
secured or formed at one or both ends as the case may be a course pitched screw N

page_text: which engages with the lock bolt F. The bolt may be actuated by grooved pullies
one of which may be secured on the axis of worm C or a detachable key may be
used for operating the same made to fit into the recess R formed in the worm C,
thus by actuating the endless cord or the key as the case may be, the worm and
worm wheel will revolve thereby causing the lock bolt F to protrude into, or be
withdrawn from the striking plate L, the interior of which is formed angular to fit
the end of the lock bolt.
Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed I declare that what
I claim is
The combination of the worm and worm wheel, substantially in the manner
described and for the purpose set forth.
The securing of window casements, doors, and similar frames by means of a bolt
operated by a worm and worn wheel acting upon a rack or screw in connection
with the lock bolt.
The end of the lock bolt F cut to an angle for the purpose of more readily
entering the striking plate.
1000