Improvements in Time-stamp Motors.
Year: 1894

page_text: Date of Application, 10th July, 1894-Accepted, 11th Aug., 1894
COMPLETE SPECIFICATION.
Improvements in Time-stamp Motors.
I, JAMES SHARON MAC COY of No. 844 Washington Street in the City and
County of New York in the State of New York, United States of America,
Manufacturer, 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 :-
This invention relates to motors for that class of time stamps which have been
termed "jumping minute time stamps," in which the mechanism for producing the
changes of the numerals and letters of the stamp remains at rest, except when, at
the end of every minute, its operation takes place rapidly, to effect the change for
the next minute. The object of my improvement is to provide a motor for
operating such a stamp, which shall be more positive in its action, and more
durable, and less liable to get out of order than the motors hitherto employed for
the purpose.
In carrying out my invention, I use two separate and independent trains of wheel-
work, each driven or actuated by a spring of its own, one of said spring-actuated
trains being the actual motor supplying the power for driving the change mechanism,
and the other being a properly regulated clock movement, which controls the
operation of the said motor by means of a trip, which prevents its action until the
proper time, and then permits it to act quickly and sufficiently to produce
the change, and afterwards stops it again until the time for making another
change.
The nature of the improvement will be described with reference to the
accompanying drawings, and its novelty set forth in claims.
Fig. 1 represents an elevation of a complete time stamp motor embodying my
invention, one of the side frames being, for the most part, removed, to expose the
train of wheels and the trip to view.
Figs. 2 and 3 are respectively face views of the motor proper and of the clock
movement separated from each other, each figure including its, respective portion of
the trip.
Fig. 4 represents a plan of the trip.
Fig. 5 represents a vertical sectional view of the regulator of the clock movement,
at right angles to Fig. 1.
Similar letters and numbers of reference designate corresponding parts in all the
figures.
A A' designate the side plates, connected by stretchers a. B is the spring barrel
containing the spring for driving the motor proper, and B' the spring barrel
containing the spring for driving the clock movement.
I will first describe the motor train, and afterwards the clock train; explaining
beforehand that in some cases, where the pinions are concealed, the tops and
bottoms of their teeth are indicated by two dotted concentric circles, which will be
sufficient to render the train intelligible to those skilled in the art.
On the spring barrel B of the motor, there is a toothed wheel b, gearing with and
driving a pinion on the arbor d, which also carries a wheel e gearing with a
pinion f fast upon the arbor g, and so driving the said arbor. This arbor g is the
arbor from which motion is transmitted to the stainp-changing mechanism, in the
same manner as in other time stamps, or in any suitable manner.
The said arbor g, which I will hereinafter speak of as the driving arbor, also
carries a wheel h, through which the trip acts to stop the motor, until the proper

page_text: time for the change, the said wheel gearing with a lantern pinion on the arbor),
which also carries a wheel k, gearing with a lantern pinion on the arbor m, which
carries a lever n, which constitutes one member of the trip.
on the
On the spring barrel B' of the clock, there is a toothed wheel o, gearing with a
pinion p on the arbor g, which also carries a wheel gearing with a pinion
arbor t. This arbor also carries, a wheel u, gearing with a pinion von the arbor w,
which also carries a lantern pinioux, which constitutes the other member of the
trip, and which operates in connection with the lever n of the motor train in the
manner hereinafter described.
The arbor w also carries a wheel y, gearing with a pinion z on the arbor 6, which
also carries a wheel 7, which gears with a pinion 8 on the arbor 9 of the escape
wheel 10, and so drives the escapement.
The lever 11, pallets 12, balance wheel 13, and hair-spring 14, are shown dotted
in Fig. 1, which also shows a front view of the regulator 15. A. side view of the
balance wheel 13, and sections of the hair-spring 14 and regulator 15, are also
shown in Fig. 5.
The clock train is so regulated that the lantern pinion r, forming one member of
the trip, and arranged in the train further back than the escape wheel, turns during
every minute a distance corresponding with the interval between the centres of two
of its teeth. The lever n constituting the other member of the trip which is driven
by the motor train, is held, as shown in Fig. 1, by the force of the motor spring in
the barrel B, in contact with one of the teeth of the pinion, during the minute
intervals between the operations of the stamp changing mechanism, but at the end
of each interval, the tooth passes away from the point of the said lever, and allows
it to trip, and permits the arbor m of the latter to make nearly a complete
revolution, which brings it into contact with the next following tooth of the said
pinion, to be thereby again arrested. During this one revolution of the arbor m
and the trip lever, which is performed so quickly as to be hardly visible, the
driving arbor
g moves far enough to effect the uecessary operation of the changing
mechanism.
In order that the trip may work with the least possible friction, and that the
power of the motor train shall not act in opposition to the clock train, but, on the
contrary, shall assist the operation of the latter, the direction of the running of
the two trains is such, that the point of the trip lever n and the tooth of the
pinion, with which it is in contact, may move in the same direction, as may be
understood by reference to the arrows in Figs. 1, 2, and 3.
It may be here
remarked, that owing to this movement, in the same direction, of the parts of the
two members of the trip which are in contact, the motor never comes to an absolutely
positive stop during the intervals between the operations of the stamp changing
mechanism, but the movement which takes place during these intervals is so slight
as to be unappreciable, and it is therefore that I have referred to the motor as
stopping, or being at rest, during those intervals.
fu order that greater security of adjustment may be obtained for the regulator of
the clock train, so that it may not be disturbed by the jarring consequent upon the
jumping of the motor train, as is liable to be the case with a regulator which depends
upon friction alone to keep it in adjustment, I not only provide the yoke 15 of the
regulator with the usual central friction clamp, as shown at 16 in Fig. 5, but I
provide on the front plate A', an arc-formed notched rack 17, as shown in Fig. 1,
the notches of said rack being formed by shallow radial indentations made directly
in the said plate, and I provide the lower arm of the yoke 15 with a tooth 18, to
engage in said rack, the said arm being sufficiently elastic to permit the tooth 18 to
slip from one notch of the rack to another, as the necessary lateral movement of
the yoke is made, to adjust the regulator, without any direct pulling of the arm
of the yoke from the notches, the engagement of the said tooth with the notches in
the rack only being deep enough to secure the regulator in the position to which it
has been adjusted.

page_text: 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 :-
1. The combination in a time stamp motor, of a motor train for operating the
stamp-changing mechanism, a clock train independent of the motor train, and a
trip consisting of two members, one of which is operated by the motor train, and
the other by the clock train, to stop the motor train during certain intervals of
time, and to liberate it between said intervals, substantially as herein set forth.
-
2. The combination in a time stamp motor, of a motor train, a clock train, and
a trip, consisting of a pinion in the clock train, and a lever in the motor train,
substantially as herein set forth.
3. The combination in a time stamp train, of a motor train, a clock train and a
trip, one member of which is operated by the motor train under the control of the
other member, which is operated by the clock train, the parts of said members
which come in contact being arranged to move in the same direction, substantially
as herein set forth.
4. In combination with a clock movement for controlling a time stamp motor, a
regulator having an elastic yoke furnished with a tooth, and a notched rack formed
directly on one of the plates of the clock movement for engaging said tooth,
substantially as herein set forth.
Dated this 10th dow of Iul 1904
NEWTON & SON,
Agents for the Applicant.