Improvements in or relating to Time-piece Mechanism.
Year: 1899

page_text: Date of Application, 7th Dec., 1899
Complate Specification Left 21st Aug. 1900-Accepted, 13th Oct., 1900
PROVISIONAL SPECIFICATION.
Improvements in or relating to Time-piece Mechanism.
I, JOHANN BONGARD. of Münster i/W.. in the Empire of Germany, do hereby
declare the nature of this invention to be as follows:
_
The present invention relates to time piece mechanism in which a second
spring is provided for the purpose of making the clock go longer before rewinding
and for rendering the action more regular. This is obtained by the fact, that,
owing to the reaction of the two springs upon each other, only a certain fraction
of the power of the springs is used in actuating the mechanism controlling the
movement of the hands, and this fraction remaining constant an even and regular
action is obtained, while, at the same time the friction in the bearings, spindles
and toothed gearings is greatly reduced. As one of the springs is gradually un-
wound the other is wound up to a certain extent. By this arrangement the
springs not only remain operative, but a state of balance is produced in the
mechanism between the two springs and a great strain is taken off the gearing
which actuates the hands.
The springs are fastened at one end to the inner side of the spring-case, while
the other end is fastened to a shaft, on which the spring case can rotate. The
toothed rim of each spring case communicates by means of a pinion and suitable
intermediate wheel work with a pinion provided on the axle of the other spring
drum. The toothed wheels are loosely arranged on the axles and involve the
latter is their rotatory movement in one direction, by a ratchet wheel and pawl
device in such a manner that both springs can be wound up separately.
The effect of the new construction is as follows:-The two spring-gearings
balance each other as regards their power effects. As one of the springs actuating
the hands of the clock by an ordinary escapement mechanism becomes unwound.
it gradually winds up to a certain extent the other spring by means of the said
pinion, toothed gearing and toothed wheel devices. The second spring drum
thereby becomes endowed with excess power and will now, in its turn, wind up
the first spring to a certain extent, by means of the second transmission gearing,
the alternate rewinding to a certain extent of both springs being continued,
until both springs are totally exhausted which will take a much longer time,
than with ordinary time pieces.
BOULT, WADE & KILBURN,
Agents for the Applicant.

page_text: I, JOHANN BONGARD, of Münster i/W., in the Empire of Germany, 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:
14
The present invention relates to time piece mechanism in which a second
spring is provided for the purpose of making the clock go longer before rewinding
and for rendering the action more regular. This is obtained by the fact, that,
owing to the reaction of the two springs upon each other, only a certain fraction
of the power of the springs is used in actuating the mechanism controlling the
movement of the hands, and this fraction remaining constant an even and regular
action is obtained, while, at the same time the friction in the bearings, spindles
and toothed gearings is greatly reduced. As one of the springs is gradually un-
wound the other is wound up to a certain extent. By this arrangement' the
springs not only remain longer operative, but a state of balance is produced in the
mechanism between the two springs and a great strain is taken off the gearing
which actuates the hands.
The invention is illustrated in the accompanying drawings of which
Figure 1 is an end view,
Figure 2 a side view, with one side wall removed, and
Figure 3 is a plan.
The springs are fastened at one end to the inner side of the spring cases a
while their other ends are fastened to shafts on which the spring cases a can
rotate. The toothed rim of each spring case a communicates by means of a
pinion d and suitable intermediate wheel work e f with a wheel ġ provided on
the axle of the other spring case. The toothed wheels 9 are loosely arranged
on the axles and involve the latter in their rotatory movement in one direction
only, by a ratchet wheel and pawl device in such a manner that both springs
can be wound up separately.
The effect of the new construction is as follows:-The two spring-gearings
balance each other as regards their power effects. As one of the springs actuating
the hands of the clock by an ordinary escapement mechanism becomes unwound,
it gradually winds up to a certain extent the other spring by means of the said
pinion, toothed gearing and toothed wheel devices. The second spring drum
thereby becomes endowed with excess power and will now, in its turn, wind up
the first spring to a certain extent, by means of the second transmission gearing,
the alternate rewinding to a certain extent of both springs being continued,
until both springs are totally exhausted which will take a much longer time,
than with ordinary time pieces.
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 is:
―
1. A clock work in which by the arrangement of two spring gearings a long
continued effect of the spring power and an even action of the clock-work is
obtained the two spring gearings being so arranged that each spring drum is
connected by means of its own crown of teeth, a pinion, several intermediary
wheels and a toothed wheel with the axle of the other spring drum in such a
manner that the springs have a like action as regards working the hands of the
clockwork, and a contrary action as regards each other so as to compensate each

page_text: other one spring winding up to a certain extent the other as it becomes reser
gradually unwound.
2. A clock-work with two mainspring gearings, in which the toothed wheels g
are loosely revolvable on the shafts b in one direction, but rotate the said shafts
by a ratchet wheel and pawl in the other direction, so that when winding the
springs by hand the wheels g are not rotated.
3. The clock-work substantially as described or illustrated in the accompanying
drawings.
August 1900.
BOULT, WADE & KILBURN,
Agents for the Applicant.