Improvements in Going Barrels and their Attachments for Clocks and Watches.
Year: 1897

page_text: Date of Application, 5th Oct., 1897
Complete Specification Left, 5th July, 1898-Accepted, 5th Nov., 1898
PROVISIONAL SPECIFICATION.
Improvements in Going Barrels and their Attachments for Clocks
and Watches.
I, HENRY ROBOTTOM, of Rose Cottage, Over Whitacre, in the County of
Warwick, Watchmaker, do hereby declare the nature of this invention to be as
follows;-
-
I fix on the barrel cover and barrel bottom a central collar to revolve in top and
bottom plates. The barrel arbor shaft works through the centre of the two collars
without touching either. The top and bottom pivots on the arbor shaft works in
two bridges on top and bottom plates. I fix either an ordinary stop work with
a star and finger piece on the barrel arbor steel wheel that is used for winding.
Or I use a circular ratchet with inverted teeth and a ratchet paul on the barrel
arbor wheel. When the watch is wound the ratchet paul falls into the ratchet
teeth and so prevents any strain on the main spring. Or I fix under the steel
barrel arbor wheel a disc with a number of holes drilled in a circle. On the face
of the steel barrel arbor wheel I fix a steel spring with a pin fixed near the end
so that when the watch is wound the pin in the spring working perpendicularly
through a hole in barrel arbor wheel when released from its upward position by
means of the star wheel drops into one of the holes in the steel disc under the
steel barrel arbor wheel and becomes locked and prevents further winding.
Dated this Fourth day of October 1897.
COMPLETE SPECIFICATION.
Improvements in Going Barrels and their Attachments for Clocks
and Watches.
'
I, HENRY ROBOTTOM, of Rose Cottage, Over Whitacre, in the County of
Warwick, Watchmaker, do hereby declare the nature of my said invention and in
what manner the same is to be performed to be particularly described anu ascer-
tained in and by the following statement:-
My invention has for its objects improvements in going barrels and their attach-
ments for clocks and watches by which I provide means for preventing the main
spring from being broken, through over winding.
In order that my invention may be clearly understood and more easily carried
into practical effect I have appended hereunto four sheets of drawings upon
which I have illustrated examples of my improvements.

page_text: Figure 1 is a plan view shewing a portion of the underside of the bottom plate
of a watch with my improvements applied thereto.
Figure 2 is a plan view of the top plate of a watch on a reduced scale shewing
one of the bridges in which the arbor shaft or spindle works.
Figure 3 is a view shewing a modified form of the method as shewn at Figure 1.
Figure 4 is a cross sectional view of Figure 3 taken on the line 1-2.
Figure 5 is a broken off plan view of the top plate of a watch with my improve-
ments applied thereto.
Figure 6 is an inverted plan view of the top plate as shewn at Figure 5 shew-
ing the main spring and barrel.
Figure 7 is a similar view to Figure 5 shewing a modified form of my improve-
ments with the mechanism in gear or the main spring fully wound.
Figure 8 is a similar view to Figure 7 shewing the mechanism out of gear or
the main spring unwound.
Figure 8 is a cross sectional view of Figure 8 taken through the line 3-4.
Figures 9, 10, 11, 12 & 13 are plan views shewing further modifications.
In carrying my invention into practice I fix on the barrel cover 6' and the barrel
bottom the central collars 3 which revolve in recesses or holes formed in the
top and bottom plates A and A¹ of a watch. The barrel arbor shaft or spindle S
works or revolves in the centre of these collars without touching either in holes
or recesses formed in the top and bottom plates or the arbor shaft pivots may
work in the steel bridges a², fitted in the top and bottom plates in a similar
manner as shewn at Figure 2. Pivoted on the barrel arbor steel wheel D is the
star wheel and on one of the collars 63 I mount the circular disc d having
the projection or finger which gears with the star wheel d. On the axis of
the star wheel d¹ is the half round or cam shaped projection which bears
against the end ds of the pawl de pivoted to the barrel arbor steel wheel and this
takes into the teeth of the internal toothed ratchet wheel E in a recess formed
It will thus be
in the bottom or pillar plate A as clearly shewn at Figure 1.
seen that when the main spring which is fixed in the interior of the barrel Bis
wound up, that the circular disc with its finger 3 which is fixed on one of the
collars 63 will cause the star wheel to turn and as soon as the flat portion of the
projection comes opposite the end 5 of the pawl de the opposite end of the
pawl is forced into the teeth of the ratchet E by the spring F which is pivoted
to the steel wheel 1 thereby locking the mechanism and preventing the spring
from being overwound as clearly shewn at Figure 1 but when the spring is fully
unwound or run down the round portion of the projection d lifts up the end d
and brings the pawl out of contact with the ratchet wheel.
In the method as shewn at Figures 3 and 4 instead of using a pawl and internally
toothed ratchet wheel I fix the ring or disc J in a recess formed in the bottom or
pillar plate A¹ which is provided with a number of holes j¹. Also fitting into
this recess above the perforated ring J is the toothed wheel W which is fixed on
the square portion of the arbor shaft S and pivoted in a recess formed in this
wheel W is the star wheel d¹ on the upper face of which I fix the peg or pin d.
This star wheel is caused to revolve by the finger d³ of the disc or finger wheel d²
which finger wheel is fixed onto the collar 63 as clearly shewn at Figure 4. Fixed
at one end to the upper face of the wheel W is the spring 4 on the other end of
which is fixed the pin f¹ which takes into one of the holes but while the watch
is being wound this spring is lifted by the pin d. When the main spring one
end of which is attached to the collar S₁ and the other end to the interior of the
barrel B, is wound by means of the spindle V motion is transmitted to the bevel
wheel w gearing with the pinion wheel which pinion wheel transmits motion
to the toothed wheel W fixed on the arbor shaft S and at each revolution of this
wheel W the star wheel comes in contact with the finger thus causing the
said star wheel to revolve and when this star wheel has made four revolutions the
peg comes opposite the holes formed in the spring F thus releasing the said
spring and allowing the pin f¹ to drop through a hole in the wheel W into one

page_text: or the notes in the perforated disc J thereby preventing the main spring from
being wound any further and also taking all strain off the working parts, but
when the barrel B begins to revolve by the action of the main spring this peg d
lifts the spring and raises the pin fi out of the hole j¹.
In the method as shewn at Figures 5 and 6 I fix the internally toothed ratchet E
to the underside of the top plate A and on the barrel cover or lid b¹ I pivot the
circular disc or wheel 64 on the underside of this disc I fix the pin or stud 65 which
works in and projects through the curved slot 66 formed in the barrel lid or cover b¹.
Also fixed on the face of the disc or wheel 4 is the pin or stud 67 which engages
with a notch or notches or the like formed in the end 5 of the the pawl do which is
pivoted to the face of the barrel lid or cover and the opposite end of this pawl is
forced into the teeth of the ratchet E by the spring F when the main spring is
fully wound thereby preventing the spring from being over wound, but when
the main spring has run down or unwound it forces the stud or pin 65 which
projects through the slot 6 on the underside of the lid or cover b towards the
edge or periphery of this lid or cover as shewn at Figure 6 thereby causing the
disc or wheel b to partially turn or revolve by which means the pin or stud b²
as it is turned with this disc tilts the end of the pawl do and draws it out of
contact with the teeth of the ratchet E thus allowing the main spring to be wound
up_again.
In the method as shewn at Figures 7, 8 and 8* I fix the externally toothed
ratchet wheel E¹ to the underside of the top plate A and on the barrel lid or
cover b¹ I pivot the star wheel or its equivalent which gears with the projection
or finger d³ formed on the disc or its equivalent & mounted under the cover 61 on
the square collar h¹ formed on the barrel arbor shaft S which is fixed to the
wheel K. Fixed to or formed on the axis of the star wheel d is the half round or
cam shaped projection which bears against the end of the pawl do and this
pawl is held in gear with the teeth of the ratchet wheel by the spring F when
the main spring is fully wound but as this spring unwinds and starts the watch
going it causes the spindle S and consequently the disc to slowly revolve and
for every revolution of this disc the star wheel is moved round one tooth so that
by the time the spring has run down and the watch wants rewinding the half
round or cam shaped projection d' which revolves with the star wheel will bear
upon and tilt the end d of the pawl thus drawing the opposite end of this pawl
out of contact with the teeth of the ratchet wheel as shewn at Figures 8 and 8^
and ready for the main spring to be rewound.
In the method as shewn at Figure 9 I employ the internally toothed ratchet
wheel E which is fixed to the underside of the top plate A and pivoted to the
barrel cover or lid 61 is the pawl d. On the underside of the end of this pawl
I fix the pin or stud h³ which works in and projects through the curved slot be
formed in the lid or cover the opposite end of this pawl is forced and held in
the teeth of the ratchet E by the spring F when the main spring is fully wound
as shewn at Figure 9 but when the spring is run down or unwound it bears against
the pin or stud h³ and tilts the end of the pawl thereby drawing the opposite
end of the pawl out of contact with the teeth of the ratchet.
In the method as shewn at Figure 10 I dispense with a ratchet wheel and use
the perforated ring or disc J which is fixed to the underside of the plate A and
pivoted to the barrel cover 6' is the star wheel or its equivalent into which the
projection or finger ³ formed on the disc fixed on the barrel arbor shaft gears.
Also fixed on the face of the star wheel is the peg or projection which as the
star wheel revolves and the main spring is fully wound comes in contact with
and lifts the spring F which is fixed to the barrel lid or cover thus causing the
peg f fixed on the end thereof to take into one of the holes j¹ in the disc J
thereby preventing the main spring from being overwound.
In the method as shewn at Figures 11 and 12 I dispense with the star wheels
or discs and pivot the pawl to the slide as shewn at Figure 12 which is a
cross section taken on the line y Figure 11 and which slide works in the

page_text: as J fixed to the plate A all operated in the manner and for the purpose sub-
stantially as herein set forth and as shewn at Figure 10.
Seventh-In watches operating the stop mechanism by the coiling of the main
spring within the watch barrel in combination with a spring fixed to the barrel
cover in the manner and for the purpose substantially as herein set forth and
as shewn upon the accompanying sheets of drawings.
Dated this 4th day of July 1898.
HENRY ROBOTTOM.
By George Barker,
Fellow of The Chartered Institute of Patent Agents,
Agent for Applicant, 77, Colmore Row, Birmingham.