IMPROVEMENTS IN WATCHES, SHOWING THE DATE OF THE MONTH AND DAYS OF THE WEEK
Year: 1872

page_text: LETTERS PATENT to Benjamin Haas, Watch and Clock Maker, of
No. 104, Boulevart Sébastopol, Paris, France, for the Invention of
"IMPROVEMENTS IN WATCHES, SHOWING THE DATE OF THE MONTH AND DAYS
OF THE WEEK."
Sealed the 21st March 1873, and dated the 30th September 1872.
PROVISIONAL SPECIFICATION left by the said Benjamin Haas at the
Office of the Commissioners of Patents, with his Petition, on the
30th September 1872.
J, BENJAMIN HAAS, Watch and Clock Maker, of No. 104, Boulevart
Sébastopol, Paris, France, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN WATCHES, SHOWING THE DATE OF THE MONTH
AND DAYS OF THE WEEK," to be as follows:-
The object, of this Invention is to mark the days of the week and
month. This is effected in the following manner:-The dial consists of
an enamelled crown, bearing on its surface the dates of the month and
the days of the week marked in circles round the crown, the outer circle
showing the dates, and the inner one the days of the week. The
mechanism for effecting this object is simple, and is merely an addition
to the ordinary works of the watch. It is mounted on the opposito end

page_text: of the shaft, forming the axis of the centre or minute wheel, which thus
constitutes also the axis of the day and date wheels.
The Invention rests on the addition to the usual works of eight pieces
forming the movement necessary for the purposes desired, and are as
follow-
1. A wheel having 48 teeth mounted on the axis of the centre wheel
of the watch, and makes a revolution in 24 hours; it is actuated by the
minute wheel.
2. A digital detent borne on the same axis as the 48 toothed wheel, tho
object being to set in motion the day and date wheels.
3. A date wheel of 31 teeth making a revolution in 24 hours.
4. A star or day wheel having seven teeth, also turning in 24 hours.
5. A spring serving to keep in repose the date wheel.
6. A similar spring serving a like purpose to the day or star wheel.
7. An anchor balance for guiding the 48 toothed wheel.
8. A spring for regulating the day and date index or hands without in
any way interfering with the ordinary works; it is actuated by a small
knob.
The motive power originates in the axis of the centre or minute wheel
of the watch, and on which the 48 toothed wheel and detent are mounted,
and from which all the other parts receive motion.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Benjamin Haas in the Great Scal Patent Office
on the 27th March 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, BENJAMIN 25
HAAS, Watch and Clock Maker, of No. 104, Boulevart Sébastopol, Paris,
France, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirtieth day of September, in the year
of our Lord One thousand eight hundred and seventy-two, in the thirty- 30
fifth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Benjamin Haas, Her special licence that I,

page_text: the said Benjamin Haas, my executors, administrators, and assigns, or
such others as I, the said Benjamin Haas, my executors, administrators,
and assigns, should at any time agree with, and no others, from time
to time and at all times thereafter during the term therein expressed,
should and lawfully might make, use, exercise, and vend, within the
United Kingdom of Great Britain and Ireland, the Channel Islands,
and Isle of Man, an Invention for "IMPROVEMENTS IN WATCHES, SHOWING
THE DATE OF THE MONTH AND DAYS OF THE WEEK," upon the condition
(amongst others) that I, the said Benjamin Haas, my executors or
administrators, by an instrument in writing under my, or their, or one
of their hands and seals, should particularly describe and ascertain the
nature of the said Invention, and in what manner the same was to be
performed, and cause the same to be filed in the Great Seal Patent
Office within six calendar months next and immediately after the date
of the said Letters Patent.
NOW KNOW YE, that I, the said Benjamin Haas, do hereby declare
the nature of my said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by
the following statement and accompanying Drawings, that is to say :-
The object of this Invention is to mark the days of the week and
month. This is effected in the following manner :-The dial consists of
an enamelled crown bearing on its surface the dates of the month and
the days of the week marked in circles round the crown, the outer circle
showing the. dates, and the inner one the days of the week. Tho
mechanism for effecting this object is simple, and is merely an addition
to the ordinary works of the watch. It is mounted on the opposite end
of the shaft, forming the axis of the centre wheel or minute wheel, which
thus constitutes also the axis of the day and date wheels.
In the accompanying Drawings the additional mechanism works
harmoniously with the ordinary watch works, without in any way
interfering with their functions.
The Invention consists in the addition to the usual works of eight
pieces forming the movement necessary for the purposes desired, and are
as follow:-
1. A wheel A having 48 teeth mounted on the axis of the centre
wheel, and makes a revolution in 24 hours; it is actuated by the minute

page_text: 2. A digit detent B borne on the same axis as the 4S toothed wheel,
the object being to set in motion the day and date wheels.
3. A date wheel C having 31 teeth making a revolution in 24 hours.
BENJAMIN HAAS, Jr. (L.S.)