IMPROVED MEANS AND APPARATUS FOR SETTING OR REGU- LATING CALENDAR WATCHES
Year: 1876

page_text: LETTERS PATENT to Thomas James Smith, of the Firm of Robertson, Brooman,
and Company, of 166, Fleet Street, in the City of London, Patent Agents, for
the Invention of "IMPROVED MEANS AND APPARATUS FOR SETTING OR REGU-
LATING CALENDAR WATCHES." A communication from abroad by Louis Joseph
Crozet, of Rue des Halles, Paris, in the Republic of France.
PROVISIONAL SPECIFICATION left by the said Thomas James Smith at the
Office of the Commissioners of Patents on the 4th February 1870.
THOMAS JAMES SMITH, of the Firm of Robertson, Brooman, and Company, of
160, Fleet Street, in the City of London, Patent Agents. "IMPROVED MEANS AND
APPARATUS FOR SETTING OR REGULATING CALENDAR WATCHES." A communication
from abroad by Louis Joseph Crozet, of Rue des Halles, Paris, in the Republic of
France.
This Invention relates to improved means and apparatus for setting or regulating
calendar watches, and consists,-
First. In a particular arrangement of push pins or stud regulators.
And, Secondly. In replacing the steel escapement by simple pins, easy and safe
to place, fixed in the wheel movement, which has to effect at a precise moment the
entrainment of the neighbouring wheel movement.
The accompanying Drawing represents a face view of the whole of the regulating
movement of a watch, which shows the seven days of the week, the thirty-one days
of the month, the twelve months of the year, and the phases of the moon.
At a, b, c, and d are shown four spring pauls, by pressing on which by means of
the studs a, b, c, and d¹, one tooth of the wheel to be actuated upon is moved at
cach pressure. Thus in place of the steel escapements, so difficult to regulate,
not only by ordinary rewinders, but by the most skilled clock makers, the simple
pins e, f, g, are provided, which it is always easy to fix upon the toothed wheels at
the exact point, which should correspond with the gearing movement of the neigh-
bouring wheel.
It will be at once seen that this system of push pauls, with simple springs
attached to the inner periphery of the watch frame, casily lends itself to convenient
grouping of the various parts, and does not binder any of the movements.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said Thomas James Smith in the Great Seal Patent Office on the 2nd August
1876.
"
THOMAS JAMES SMITH, of the Firm of Robertson, Brooman, and Company, of
166, Fleet Street, in the City of London, Patent Agents.
IMPROVED MEANS AND
APPARATUS FOR SETTING OR REGULATING CALENDAR WATCHES." A communication
from abroad by Louis Joseph Crozet, of Rue des Halles, Paris, in the Republic of
France.
This Invention relates to improved means and apparatus for setting or regulating
calendar watches, and consists,―
First. In a particular arrangement of push pins or stud regulators.
And, Secondly. In replacing the steel escapement by simple pins, easy and safe
to place, fixed in the wheel movement which has to effect at a precise moment the
entrainment of the neighbouring wheel movement.
The accompanying Drawing represents a face view of the whole of the regulating
movement of a watch, which shows the seven days of the week, the thirty-one days
of the month, the twelve months of the year, and the phases of the moon.
At a, b, c, and d are shown four spring pauls, by pressing on which by means
of the studs a¹, b, c, and d¹, one tooth of the wheel to be actuated upon is moved
at each pressure. Thus in place of the steel escapement, so difficult to regulate,
not only by ordinary winders, but by the most skilled clockmakers, the simple
pins e, f, g, are provided, which it is always easy to fix upon the toothed wheels at
the exact point which should correspond with the gearing movement of the neigh-
bouring wheel.
It will be at once seen that this system of push pauls, with simple springs
attached to the inner periphery of the watch frame, easily accommodates itself to
convenient grouping of the various parts, and does not hinder any of the move-
.ments. It is in addition limited to one single piece of mechanism held by screws.
As to the arrangement of the pins, it is if possible more simple still. In fact
any mechanic comparing it with the arrangement known as the steel hook scape-
ment will immediately see the difference. It is easy to adjust and to regulate, and
is equally easy to replace, without requiring anything like the skill necessary for
replacing the hook scapement, the adjustment of which frequently fails.
Having now described the nature of the said Invention, and in what manner the
same is to be performed, I declare that I claim the application to watches of a
novel arrangement of mechanism, by means of which the 7 days of the week, the
31 days of the month, the 12 months of the year, and the phrases of the moon are
rendered visible, the chief feature of this mechanism consisting in a new method of
push paul, and in a simple pin arranged instead and in place of the ordinary steel
hook scapement, as described and as shown in the accompanying Drawings.
In witness whereof, I, the said Thomas James Smith, have hereunto set my
hand and seal, this Second day of August, One thousand eight hundred
and seventy-six.
4
T. J. SMITH. (LS.)