Improvements in the Springs and Going Barrels of Watches, Clocks, and other Spring Driven Instruments.
Year: 1894

page_text: Date of Application, 7th Dec., 1894
Complete Specification Left, 7th Sept., 1895-Accepted, 19th Oct., 1895
PROVISIONAL SPECIFICATION.
Improvements in the Springs and Going Barrels of Watches, Clocks,
and other Spring Driven Instruments.
I, JOHN HAWLEY, trading as John Hawley & Son, of Cow Lane, Coventry,
Warwickshire, Watch Manufacturer, do hereby declare the nature of this invention
to be as follows:-
This invention has reference to the springs and going barrels of watches clocks
and other spring driven instruments and consists firstly in providing the box part of
the going barrel with one or more, preferably three, inclined clutch feet or
teeth taking into corresponding inclined holes or recesses in a steel or other
metal disc like plate which by screws or by other means is fixed to the toothed
driving wheel part of the barrel (or these inclined holes or recesses may be made
in the face of the said toothed driving wheel part itself) so that when the going
barrel is being turned by the spring in the proper direction to drive the mechanism,
the inclined clutch feet or teeth of the box like part of the barrel will by engaging
in the said corresponding inclined holes or recesses keep the box like part of the
barrel down on the toothed wheel part and turn the latter and the other wheels
and pinions in the train; but in the event of the main spring breaking, the force of
the recoil will cause the box like part of the barrel to turn through a small angle
in the opposite direction when the inclined feet or teeth acting on the said inclined
holes or recesses will cause the barrel to rise off the bottom and to be wedged and
securely held between the pillar plate and the top plate thus preventing any
damage to the train by the recoil of the spring.
According to the second part of this invention we fix the outer end of the spring
to the barrel by means of a screw which passes through the box like part into a
tapped hole in the end of the spring which latter is doubled or folded upon itself
so as to form a double thickness of the spring to be tapped for the screw.
thus dispense with the small spring bit which is usually rivetted on to the outer
end of the spring.
Dated this 6th day of December 1894
We
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Springs and Going Barrels of Watches, Clocks,
and other Spring Driven Instruments.
I, JOHN HAWLLY, trading as John Hawley and Son, of Cow Lane, Coventry,
Warwickshire, Watch 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 has reference to the springs and going barrels of watches, clorks
and other spring driven instruments and consists firstly of the hereinde-cribed
improved means for preventing the recoil of the spring and damage to the train

page_text: in the event of the main spring breaking, and secondly of the hereindescribed
improved construction of the end of the main spring which is to be fixed to the
barrel. By this second part of my said invention I am enabled to dispense with
the small spring bit which is usually rivetted on to the outer end of the spring.
I will describe my invention by referring to the accompanying drawing on
which
Fig. is a cross section of a going barrel constructed according to this
invention;
Fig. 2 is a face view of the toothed driving wheel part of the barrel looking
from the inside of the same;
Fig. 3 shews the said toothed wheel part in cross section;
Fig. 4 is a face view and a cross section of a notched ring like plate forming a
part of the said toothed wheel part of the barrel;
Fig. 5 shews the box part of the said barrel separately in side elevation and in
face view and
Fig. 6 shews how I form the end of the main spring in accordance with the
second part of my said invention.
The same letters of reference indicate the same parts in all the figures.
In carrying out the first part of my said invention I provide the box part A
of the going barrel with one or more, preferably three, inclined clutch feet or teeth
marked respectively a¹ a² a³ (see Fig. 5) taking into corresponding inclined holes
or recesses b₁ 12 63 in the steel or other metal disc like plate B which by the
screws ce d¹ d² d³ or by other means is fixed to the toothed driving wheel
part E of the barrel (or these inclined holes or recesses 61 62 63 may be made in
the face of the said toothed driving wheel part E itself) so that when the going
barrel is being turned by the spring in the proper direction (as shewn by the
arrow in Fig. 2) to drive the mechanism, the inclined clutch feet or teeth a¹ a² a³
of the box like part A of the barrel will, by engaging in the said corresponding
inclined holes or recesses b¹³ ³ keep the box like part A of the barrel down on
the toothed wheel part E and turn the latter and the other wheels and pinions in
the train; but in the event of the main spring F breaking the force of the recoil
will cause the box like part A of the barrel to turn through a small angle in the
opposite direction when the incline: parts or teeth a¹a acting on the said
inclined holes or recesses will cause the box like part A of the barrel to
rise off the bottom B and to be wedged and securely held between the pillar plate
and the top plate thus preventing any damage to the train by the recoil of the
spring. I find an angle of thirty-five degrees for the neting surfaces of the
inclined teeth and holes or recesses
gives very good results in
practice.
According to the second part of this invention I fix the outer end of the
spring F to the barrel by means of a screw g (Fig. 1) which passes through the
box like part A into a tapped hole in the end of the spring F which latter is
(as shewn in Fig. 6) doubled or folded upon itself so as to form a double thickness
of the spring to be tapped for the screw. I thus dispense with the small spring
bit which is usually rivetted on to the outer end of the spring.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is
1. In the going barrel of a watch clock or other spring driven instrument,
making the box like part of the going barrel with inclined clutch feet or teeth
taking into corresponding inclined holes or recesses in the face of the toothed
driving wheel part of the barrel, or in a plate fixed to id driving whool port, the
sail clutch feet or teeth and the inclined recesses being arranged substantially as
set forth and shewn so that when the going barrel is turning in the right direction
to drive the train the inclined teeth engaging with the fibres will drive 5
the toothed wheel part of the barrel and the train, but when the main spring
j

page_text: breaks and the barrel recoils said inclined surfaces of the feet or teeth acting on
the inclined surfaces of the recesses will cause the box like part of the barrel to
rise or otherwise move away from the face of the driving wheel part and be
jammed and held against the top plate and thus prevent any damage to the train,
as herein set forth.
2. In the going barrel of a watch clock or other spring driven instrument, the
combination with the toothed driving wheel part E of the plate B fixed thereto
and provided with inclined recesses such as b¹ 63 63 and the box like part A of the
barrel provided with inclined feet or teeth such as a' a a³ corresponding with the
said inclined holes or recesses and arranged so as to drive the toothed plate part B
when turned by spring in the right direction and to rise or move away from the
plate part B when the box like part A is turned in the wrong direction by the
recoil of the spring, substantially as set forth.
3. A main spring for a watch clock or other spring driven instrument having its
outer end doubled or folded upon itself so as to form a double thickness and
provided with a screw threaded hole through the double thickness for a screw for
fixing the said end to the going barrel, substantially as herein before described.
Dated this 6th day of September 1895.
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.