AN IMPROVED METHOD OF INDICATING THE TIME FROM 13 To 24 O'CLOCK ACCORDING TO THE NEW METHOD OF ENUMERATION ABOUT TO BE INTRODUCED
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I EDWARD JOSEPH LEZARD of 38 Holborn Viaduct in the City of London
Watch Manufacturer do hereby declare the nature of my invention for AN
IMPROVED METHOD OF INDICATING THE TIME FROM 13 To 24 O'CLOCK ACCORDING
TO THE NEW METHOD OF ENUMERATION ABOUT TO BE INTRODUCED to be as
follows:-
The face or dial of the clock or watch to which my invention is applied is
perforated with twelve holes or apertures in the places where the figures from
1 to 12 appear on an ordinary watch as at present constructed. The face or dial
so perforated has upon it no figures to denote the hours but is in all other respects
exactly like the face of a common watch or clock having the five divisions for
minutes marked in the usual way between each two of the above mentioned
perforations. Immediately under this perforated dial is placed a thin metal disc
constructed so as to revolve and having printed upon it the usual numbers which
appear on the face of a watch or clock, and by the side of each of these numbers
the corresponding figure in the new enumeration of the time from 12 o clock noon
to midnight vizt by the side of the figure one the figure 13, by the side of the
figure 2-14 and so on, and by the side of 12 the figure 24. The size of the
apertures in the perforated dial (as described above) is such that one only of
the figures appears visible, through the aperture in the normal state of the watch
or clock and the number so appearing is one of the usual numbers printed on a
watch face vizt one, two three to twelve. The disc on which these numbers are
printed may be caused to revolve by the movement of a small spring or lever so as
to move out of sight the figure so appearing and to show in its place the
corresponding number of the new enumeration. Thus by putting the lever
aforesaid in motion the time (after noon) may be shown in the new enumeration.
Dated this 12th day of December 1884.

page_text: COMPLETE SPECIFICATION.
I, EDWARD JOSEPH LEZARD of 88, Holborn Viaduct in the City of London
Watch Manufacturer do hereby declare the nature of the said invention for "AN
IMPROVED METHOD OF INDICATING THE TIME FROM THIRTEEN TO TWENTY FOUR
O'CLOCK ACCORDING TO THE NEW METHOD OF ENUMERATION, and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement:-
"
The face or dial of the Clock or Watch to which my Invention is applied is
perforated with twelve holes or apertures of a circular or other shape in the places
where the figures from 1 to 12, appear on an ordinary watch (see Fig: 1). The
face or dial so perforated has upon it no figures to denote the hours but is in all
other respects exactly like the face of a common watch or clock having the five
divisions for minutes marked in the usual manner between each two of the above
mentioned perforations. Immediately under this perforated dial is placed a thin
metal disc so arranged that the disc when set in motion may be caused to revolve
or shift in a circular direction. Upon this disc are printed the numbers which
appear on the face of an ordinary watch or clock and by the side of each of these
numbers is printed also the corresponding figure in the new enumeration of the
time from twelve o'clock to midnight vizt by the side of the figure 1, the
figure 13 &c (see Fig: 2)-The size of the apertures or holes in the perforated dial
(Fig 1.) is such that only one of the above mentioned figures is at any one time
visible through any one of the apertures and the number in each case so appearing
is in the normal state of the watch or clock one of the numbers usually printed on
a clock face vizt 1. 2. 3. and so on to 12 as in Fig: 3.-The operation of the
invention then takes place as follows:-The moveable disc on which the last
mentioned numbers are printed is caused to revolve or shift (in the manner
already described) by the movement of a small lever or push pin which is worked
from the side of the watch or clock as in Fig: 4. A being the lever or pushpin and
the action being shewn by the dotted line B.-A is moved to such an extent as to
remove out of sight the figure which appeared on the face of the said disc before
such revolution (that figure being by the same movement hidden under the face or
dial of the watch or clock) and to shew in its place the figure corresponding to it
in the new system of enumeration-The same result can also be effected by
gearing as shewn in Fig: 5 in which A. is a tube carrying the pinion and attached
to the crown E and C. is a small rack fixed to the back of the moveable disc upon
which the pinion (B) works the two being so arranged that by slighting elevating
the crown of the watch E. the pinion (B) is brought into gear with the rack (C)
and by turning the crown E. the pinion B. is set in motion and acts upon the
rack C. shifting the moveable disc to the right or left as required. When it is not
required to move the disc in the manner above described the pinion B. is kept out
of gear by means of a spring D. of which the one end is attached by a screw to the
plate of the watch, and the other end rests in a slot (F.) cut in the tube A. The
above principle of gearing can also be applied for this purpose with the necessary

page_text: modifications, at other parts of the watch thus by a movement of the lever, pushpin
or gearing the time, according to the new enumeration from 1. p.m. to midnight
can be seen as in Fig: 6.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim as my Invention is
(1) The combination for the purposes aforesaid of the perforated face or dial
with the moveable or revolving disc substantially as above described and shown in
the accompanying Drawings.
(2) The combination for the purposes aforesaid of the lever or push pin or the
gearing with the said perforated face and moveable or revolving disc arranged and
working substantially as herein before described and shown in the accompanying
Drawings.