Year: 1887

page_text: Date of Application, 2nd Mar., 1887
Complete Left, 17th Sept., 1887
Complete Accepted, 2nd Mar., 1888
I, WORTHWORKS WALL, of 36 Market Street, Bradford in the County of York.
Tailor, do hereby declare the nature of this invention to be as follows:-
My invention consists in a device added to the sliding bolt of a door, whereby a
notice-plate or board is caused to be exhibited on the out side of the door, by the
action of bolting the door, upon which plate or board is printed the word "engagel "
or the like.
To carry out my invention 1 fix to the top side of the sliding door-bolt, a flat dise
of metal which actuates a crescent-formed catch, the two horns of the crescent
embracing the disc, and by the horizontal motion of the disc which causes the crescent
to perform.part of a revolution, a spindle attached to the crescent and passing through
the door, is rotated, which spindle has a toothed quadrant fixed to it upon the outside
of the door. This quadrant is caused to move round by the motion of the bolt, and
by means of its teeth to raise a rack fixed to the bottom of the notice board, whereby
the notice to be exhibited is brought opposite to an aperture in the casing in which
the notice-board slides vertically.
Thus the sliding of the door-bolt actuating the crescent and quadrant causes the
notice to be displayed.
1002
WM. JAS. BAKER,
Town Hall Chambers, Bradford,'
Agent for the Applicant.

page_text: I, WORTH WORKS WALL, of 36 Market Street, Bradford, in the county of York,
Tailor, 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 consists in a device added to the sliding bolt of a door, whereby a
notice-plate or board is caused to be exhibited on the outside of the door, by the
action of bolting the door, upon which plate or board is printed the word "engaged
or the like.
"
To carry out my invention I fix to the top side of the sliding door bolt, a flat disc
of metal which actuates a crescent-formed catch, the two horns of the crescent
embracing the disc, and by the horizontal motion of the disc which causes the crescent
to perform part of a revolution, a spindle attached to the crescent and passing through
the door is rotated, which spindle has a toothed quadrant fixed to it upon the outside
of the door. This quadrant is caused to move round by the motion of the bolt, and
by means of its teeth to raise a rack fixed to the bottom of the notice board, whereby
the notice to be exhibited is brought opposite to an aperture in the casing in which the
notice-board slides vertically.
Thus the sliding of the door-bolt actuating the crescent and quadrant causes the
notice to be displayed.
In order to enable my invention to be fully understood I will proceed to describe
the same by reference to the accompanying drawings in which figure 1 represents an
elevation of the bolt and its action upon the crescent shaped catch. Figure 2
represents an elevation of the quadrant and rack upon the outside of a door and
operated by means of the bolt from the inside. Figure 3 represents an elevation of
the notice plate with its casing or box as fixed upon the outside of a door, and
Figure 4 represents a plan of part of a door and door jamb with the improved door
bolt and indicator fixed in position.
Similar letters refer to similar parts in all the drawings.
The bolt is represented at .A and the knob by means of which it is operated at B.
The disc projection L upon the top of the bolt engages with the crescent-formed
catch D, which is caused to rotate by the motion of the bolt thereby actuating the
spindle E and raising the toothed quadrant H. This motion lifts the vertical bar J,
working in the guides K and the notice N being fixed upon the vertical bar J, the
required notice is displayed by being brought opposite to the aperture in the casing M
by the operation of the bolt and quadrant in the manner described.
When the bolt is required to operate in the opposite direction or to the left hand
instead of to the right the casing M is turned upside down whereby the aperture is

page_text: placed nearer to the bottom than to the top and the required notice will then be
displayed at the aperture when the bolt is shot to the left instead of to the right.
This change can be effected without any other change or refitting of any other parts
of the bolt.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed I declare that what I claim is :-
In combination with a door bolt the projecting disc L, the crescent formed catch I)
acting upon the spindle E, and the toothed quadrant H actuating the vertical rack J,
upon which is fixed the notice to be displayed, all substantially in the manner
described and represented in the accompanying drawings.
1002
F. J. WALWORTH,
Town Hall Chambers, Bradford,
Agent for the Applicant.