IMPROVEMENTS IN OR RELATING TO WATCHES, APPLICABLE ALSO TO SOME CLOCKS AND OTHER MECHANISMS."
Year: 1880

page_text: LETTERS PATENT to Edwin Wright, of Northampton, in the County of
Northampton, for an Invention of "IMPROVEMENTS IN OR RELATING TO
WATCHES, APPLICABLE ALSO TO SOME CLOCKS AND OTHER MECHANISMS."
PROVISIONAL SPECIFICATION left by the said Edwin Wright at the Office
of the Commissioners of Patents on the 28th February 1880.
" IMPROVE-
EDWIN WRIGHT, of Northampton, in the County of Northampton.
MENTS IN OR RELATING TO WATCHES, APPLICABLE ALSO TO SOME CLOCKS AND
OTHER MECHANISMS."
My object in this Invention is simplicity and effectiveness in the movements,
chiefly as regards winding and setting the hands.
1 take first an ordinary going barrel, with one or both covers or ends partly
recessed to half its thickness, the recess terminating at a radial slot extending
nearly to the circumference from near the centre, and the other edge of said slot
being also recessed for a short distance upon the opposite side of the cover or end.
A thin curved arm, of a thickness equal to the recess, is pivotted at one part of it
near the circumference of the barrel, so as to be free to move within the recess and
lie just level with the inside of the cover, the other end of said arm being provided
with a projection (which moves in the second small recess) carrying preferably a
couple of little projecting pins.
The arm at the pivotted end is bent for a short distance, and made so deep that
it may extend right through the barrel, the second pivot working in a hole in the
opposite ond or cover, the main spring being preferably attached to the arm at the
junction of the bend and the main part of the arm. The arm is curved inwardly,
to allow of greater strength in the cover, the recess being formed and shaped like
the arm.
Sometimes, in very deep barrels, I find it necessary to employ a second arm at
the other end of the barrel to avoid a side strain, in which case the two arms are
usually connected at or near the pivotted end. At or near the pivotted end of the
arm is hooked or otherwise attached the outer end of the spring. Upon the barrel
arbor, and so placed that it must turn with it (I do this by means of a square hole
in the plate and square end to the arbor, or by making both of the same piece), is a

page_text: plate, preferably of steel, and spirally grooved or ridged on one side; this plate lies
against the recessed barrel-end or cover, though just free of it, so that the pins or
projections of the arm may engage with the spiral, so that when the plate is turned
independently of the barrel the free end of the arm moves towards or from the
centre of the barrel. By this means I control the force of the spring, because as the
spring is wound up the end of the arm approaches the centre, thereby giving
shorter leverage, but as the spring unwinds and loses power it returns towards the
circumference, thereby getting greater leverage.
Upon the opposite side or edge of the spirally-grooved plate is placed the click
for winding and part of the stopwork or arrangement to prevent overwinding.
This plate works in a recess in the framework of the watch, the edges of the recess
being provided with teeth or serrations, and the click being upon the plate catches
into these notches in the ordinary manner. It will be evident that if this click be
securely held in one of these notches the watch cannot be wound up any further,
and this is the method adopted as the stopwork, and is effected as follows:-Upon
the plate is a spring which acts as a bolt to hold the click in its place; this is a
flat piece of metal, and extends nearly or quite across the plate, being pivotted or
fastened at the end farthest from the click, and opened out at the centre for the
passage of the arbor. If this spring-bolt be drawn in a straight line it will come
right behind the end of the click and prevent its withdrawal, but if it stands at
one side it will leave the click free to move. Upon one half of the divided part of
the spring-bolt, where the arbor passes, is a small projection which passes through
a suitable slot in the plate, so as to be capable of being caught by the end of the
movable arm on the other side, the action being that when the watch is fully
wound up the end of the arm catches this projection of the spring-bolt, thereby
moving it and forcing the spring-bolt round so as to lock the click. As the spring
unwinds this pressure is removed, and the spring-bolt withdraws from the click,
leaving it free to work again. In practice I generally cut through one side of the
divided portion of the spring-bolt, so as to give additional springiness to it. By
this means, supposing the watch to be fully wound up and the click just between
two of the notches, this portion of the spring-bolt gives a little until the click is
able to enter a notch, thereby preventing any undue strain upon the parts in
winding. By this means the strain incident to winding up is taken by the plate
only, thus relieving the train therefrom. The serrations or teeth can be either
produced upon a ring let into the framework of the watch, or stamped out, of the
plate itself. When adapting my Invention to keyless watches I prefer to form a
boss upon the back of the spirally-grooved plate, around which I place a second
serrated ring, a small duplicate of the spring-bolt being provided in connection
with the boss, the other parts of the keyless gear being those usually employed.
When winding thus without a key the little spring-bolt is allowed to withdraw
when the watch is wound up, and the mechanisin is thrown out of gear, thus,
as before, avoiding all strain upon the train or the parts employed in winding.
"
For the purpose of greater facility in setting the hands of keyless watches I form
on the underside of what is technically known as the "cannon pinion a square,
upon which I fit loosely or otherwise a larger wheel, with which the keyless
mechanism gears, and carry the minute wheel over this by means of a cock or
bridge.
The chief advantages of my Invention are that, if the spring breaks, or if the
click work gives way (though this is extremely unlikely to happen), the shock is
materially diminished, thus tending to preserve the mechanism from injury. In
the event of the main spring breaking, the movable arm following it up and held
by the spiral groove secures it from suddenly expanding. At the outer end of the
spiral a small part of the plate is partly cut and bent so as to form a spring; in
ordinary going this is sufficient to stop the watch and prevent the spring unwinding
altogether, but should the clickwork give way the arm would be forced past this
small spring, and leaving the spiral altogether pass outwards into an annular space,
and the force be harmlessly expended.

page_text: The movable arm is used to actuate the stop and control the power of the spring,
but if desired it can, of course, be used for the former purpose only.
Another part of my Invention consists in an improved safety pinion. I fashion
the leaves of the pinion at one end into ratchet teeth, and truly bore out the centre
of the said pinion to receive the arbor, which is also provided with ratchet teeth
similar to those upon the pinion. The pinion is placed upon the arbor with the
ratchet surfaces in contact, and the teeth gear firmly together when force is applied
in the direction in which the arbor is to be driven.
For ensuring proper contact in the ratchet surfaces I make use of a light spring
attached to the framework of the watch or mechanism, and provided with a suitable
screw for the purpose of adjustment, so as to allow proper freedom to the arbor;
or if there be space available the spring may be of helical or other form, and placed
upon the arbor above or beneath the pinion. When force is applied in a direction
contrary to that which is intended the ratchet teeth slide over each other, com-
pressing the spring, and the watch is preserved from injury. The advantages I
claim for this form of pinion are that it is not liablo to "jam," or to set fast by
slight corrosion, and that in confined spaces pinions of great proportional length
can be employed, thus ensuring stability.
I have now described my Invention as applied to watches, but it may be applied
with the necessary modifications to some kinds of clocks, musical boxes, and other
mechanisms in which going barrels are employed.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Edwin Wright in the Great Seal Patent Office on the 28th August
1880.*
EDWIN WRIGHT, of Northampton, in the County of Northampton.
" IMPROVE-
MENTS IN OR RELATING TO WATCHES, APPLICABLE ALSO TO SOME CLOCKS AND
OTHER MECHANISMS."
My Invention relates chiefly to an improvement in the winding mechanism of
watches, clocks, or other apparatus, in which are employed what are technically
known as "going barrels," that is to say, barrels in which the spring is so applied
that the apparatus is kept "going" during the process of winding up; and by the
use of my Invention the spring is so wound up that the force it oxerts upon tho
train of wheels is made less unequal than is usual, and the train of wheels is also
kept entirely or almost entirely free from the severe and injurious strains which
usually arise from accident or carelessness in terminating the winding; and
moreover the train of wheels, and also some of the parts of the apparatus, are
rendered less liable to the injuries usually arising from the failure or breakage of
the parts engaged in winding.
I obtain my object by the following means illustrated by the accompanying
Drawings, in which,—
Fig. 1 is a view of the end or cover of the going barrel. A recess A, extending
about half way through the thickness of the metal, is formed upon the outside of
the cover or end, and an arm B of tempered steel is pivotted in the recess at A¹.
The thickness of the arm is equal to the depth of the recess, and at the end B' a
stud or projection rises a convenient distance above the level of the arm.
The end B is bent at a conveient angle to the rest of the arm, so that it may
clear the edge of the cover, as shown.
The arm B is thus free to move to and fro in the recess A, and the stud B¹ is the
only part of the arm that rises above the level of the barrel end.
A small portion of the edge of the barrel cover is cut away at C, and a slot to
correspond is cut directly under it in the opposite end or bottom of the barrel.
Fig.2. D, E, is a steel spring, provided at the end D with a hook D¹, and at the
end E with projections E', E', which are made to fit the slots C (Fig. 1).
The spring, Fig. 2, at the end E is preferably about equal in width and strength
to the mainspring, but is tapered or thinned down, either edgewise or sideways,
to a fourth or thereabouts of that width, thickness, or strength towards the end D,
where a suitable head is left for carrying the hook D'.
The spring, Fig. 2, is sprung into the barrel (the inner edge of which may if
preferred be recessed to receive it), and is held in place by its parts E', E', going
into the slot C (Fig. 1).
The length of the spring, Fig. 2, between the head at D and the projections
at E is preferably about equal to half the circumference of the barrel, and the end
of the mainspring is attached to the hook D', the inner end being attached to the
barrel arbor as usual.
Fig. 3 is a disc, preferably of steel, of any convenient thickness, and upon its
under side a spiral groove F is formed. The groove extends from the periphery of
the disc to near the centre, and the number of its turns is equal to the number
of revolutions that the barrel arbor is required to make in winding up the
spring.
The diameter of the disc is rather less than that of the barrel, and its edge is
preferably thinned down upon the upper or plain side so as to leave a boss of any
convenient size in the centre.
The inner end of the spiral groove terminates in a slot G, which is cut through
the disc and boss.
-

page_text: The outer end of the spiral groove is left open at the periphery of the disc, the
ridge or thick part of the disc slanting off to this opening and so terminating the
groove, as shown at F'.
The spirally grooved disc with its boss is attached to the barrel arbor by a square
or other convenient device so as to turn with it. The spirally grooved side of the
disc lies over the recessed barrel end (Fig. 1), but is held just free of it, and the
stud B (Fig. 1) takes into and is held by the turns of the spiral.
Fig. 4 is an enlarged view of the upper side of the disc or boss, and of the
mechanism in connection therewith.
Part of the framo plate H, or other suitable portion of the watch or apparatus,
is cut away to receive the boss J, and the opening is surrounded by the ratchet K.
The ratchet may either be made as a separate part and fitted to the apparatus, or
the teeth may be formed directly in the solid frame plate or other convenient
portion of the watch or apparatus.
Land M are clicks, and N is the click spring, all working upon suitable pivots
or studs, in or on the boss or disc, and the click L is provided at L' with a stud
which goes down through the slot G (Figs. 3 and 4) into the spiral upon the
under side of the disc. The stud L is shown in the slot G, Fig. 3.
The operation of the mechanism is as follows :-
The barrel and its accessories being put together, the barrel arbor is turned
round as far as is required to set up the spring, and the spirally grooved disc is then
brought down so that the stud B' of the arm B (Fig. 1) goes into the spiral
groove at its outer end, and resting against the part Fi (Fig. 3) prevents the barrel
arbor turning back.
When the frame is put together the boss J comes up through the opening inside
the ratchet K until the upper side of the edge of the disc comes into contact with the
under side of the frame plate H, and the barrel arbor is so proportioned that when
the frame is fixed together the disc is held flat up against the frame plate H, and the
boss J being accurately fitted to the opening, the disc and boss are free to turn
with the barrel arbor, and form for it a firm and solid bearing, no pivot being
necessary.
The clicks L and M and the click spring N are then placed in their respective
positions upon the boss, and the watch may be wound up.
When the barrel arbor is turned by means of the key it turns with it tho disc
and boss, and the ends L³ and M' of the clicks Land M having an outward tendency
imparted to them by the click spring N rise and fall over the ratchet teeth and
prevent the barrel arbor running back. As the winding proceeds the gradually
increasing force of the main spring draws the spring D, E, Fig. 2, over in the form
of a curve, the head and the hook D' leaving the rim of the barrel and moving
nearer to the barrel arbor, and the effect of this is that the mainspring is wound
more centrally round the barrel arbor, and also that the force it exerts upon the
train of wheels in unwinding is made much less unequal than is the case when the
In the meantime
mainspring is attached direct to the barrel in tho usual manner.
the stud B of the arm B (Fig. 1) is carried along the spiral groove F (Fig. 3) until
it comes into contact with the stud L' of the click L, which stud, as before explained,
passes down through the slot G (Figs. 3 and 4) to the spiral groove at the underside
of the disc, and as the barrel arbor with the disc and boss still continues to turn,
the stud L' is pushed by the stud B along the slot G, and so moves the click L
over until the point L' of click L passes the end N' of the click-spring N,
and the click L then immediately shoots over, and its end L going into one of
the spaces between the ratchet teeth prevents the winding being carried any
further.
By this means the strain caused by the sudden check at the end of the winding
is borne by the frame plate H or other substantial portion of the watch or apparatus
instead of being conveyed to the train of wheels, as is the caso where winding
mechanism of the usual kind is employed, and here some of the great advantages
of this Invention become apparent, for it is evident that the entire arrangement can

page_text: be made so strong that short of wrenching the winding square bodily off no injury
can occur to the mechanism, however much or in whichever direction force is
applied to turn the key or winder.
Fig. 4 shows the position of the mechanism when the winding is brought to an
end in the manner just described, and it now remains to release the end L of the
click L froin the ratchet K, and to bring its end L³ down to the ratchet again in
readiness for the next winding, and this I do without offering any impediment to
the ordinary running down of the watch or apparatus. When the pressure of the
key is removed, the pull of the mainspring draws the barrel arbor backward, the
end L² of click L rises to the top of the tooth K, the end M' of click M falls into
the space K', and at the same time the end N¹ of the click spring N comes backward
over the point L of the click L, and sliding down the longer of the two inclined
surfaces on click L moves the said click over into its original position so soon as the
stud B recedes from the slot G.
The
The click L is so adjusted that after one end of it leaves the ratchet, the click has
to move on some little distance before the opposite end reaches the ratchet.
thin or elastic portion of the click spring N branches off to the click L from a point
intermediate between the pivot of the clickspring and its point of contact with the
click M, so that as the click M rises and falls over the ratchet teeth it imparts a
backward and forward motion to the part N' of the clickspring. The effect of this
is that there are two points from which L shoots. In approaching the ratchet L³
shoots before it reaches the ratchet, and in receding from the ratchet it shoots
before it gets clear of the ratchet. I prefer to leave the part N of the clickspring
soft so that by bending it slightly in either direction as required the end N¹ may
be adjusted to pass and repass the point L' of click L at the proper times.
To find the proper adjustment of the click spring N, I wind the mainspring
partly up so as to leave the barrel arbor supported (ie., kept from running back)
by the click M, and move the click L over until the end L³ comes into contact with
the top of one of the ratchet teeth. I then adjust the click spring so that its
end N has just a safe bearing on the longer of the two inclined surfaces of
click L.
When the watch is going the arm B is carried round with the barrel and the
stud B' travels backward along the spiral groove until it comes into contact with
the part F (Fig. 3) and the watch is then run down.
Referring again to Fig. 1, it will be seen that the arm B when lying near the
periphery of the barrel comes into contact with the edge of the recess A at a point
near to the pivot A¹, and that the stud B¹ stands a short distance from the edge of
the recess.
When in this position (which is shown in Fig. 1) the edge of the stud B¹
is just level with (the outer end of the spiral groove, and if the stud B' is moved
nearer to the outer edge of the recess the elasticity or springiness of the arm B is
called into action.
When therefore the stud B¹ comes into contact with the part F¹ (Fig. 3) in the
natural running down of the watch it meets with sufficient resistance to stop the
watch altogether, but should the barrel arbor suddenly recoil through the breakage
of the click or other similar cause, the stud B' springs over the part F¹ and is
conducted to the outside of the spiral where the force is harmlessly expended.
In cases where additional strength is required in the arm B, I forin at the
pivotted end of it a spring or tail piece, which is carried up towards the centre
of the barrel end and arranged so that its end rests against a collet surrounding
the barrel arbor (or against the arbor itself) when the arm B is in the position
shewn in Fig. 1. The arm B can then be made inflexible, and the elasticity of the
spring or tail piece allows the stud B' to be forced to the outside of the spiral. The
recess A may in this case be dispensed with.
Should the click spring N (Fig. 4) break the barrel arbor cannot recoil, nor can
it be turned in either direction, for the click M is so adjusted that when either end
rises to the top of a ratchet tooth, the opposite end slightly dips into a space
between two other teeth (see M², Fig. 4, in which this peculiarity is somewhat

page_text: exaggerated for the sake of clearness), and unless some force, such as that of the
click spring, is present to lift it out again, it catches the first tooth it comes to and
arrests the motion of the barrel arbor. If the click L is adjusted in a similar
manner, the click M may if preferred be dispensed with altogether, and in that case
it will be found sufficient to cause the stud B' of arm B (Fig. 1) to lift the click-
spring off from the click L, and the winding will be immediately arrested; but as
the action under these conditions is less prompt than under those I bave previously
described, I prefer to use the click M, the more so, as the use of the two clicks
imparts additional strength to the mechanism. If however it is desired that only
one click should act during the winding up, I prefer to shorten the slot G so that
the end L³ of click L is held free of the ratchet; the click L will then remain
stationary upon the boss until acted on by the stud B. The part L' of click L
may be left soft so as to afford a means of adjustment by bending.
For keyless watches the ratchet K (or its duplicate) is attached to or cut in the
barrel wheel of the usual toothed gearing, and is turned by means of the milled
button at the pendant in the ordinary manner. The end L of click L being
engaged in the ratchet, the barrel arbor and the disc and boss are carried round
with it. The barrel arbor is supported upon the plate by the click M, or by
ordinary ratchet work, and when the stud B' of arm B (Fig. 1) comes into contact
with the stud L' of click L through the slot G (Figs. 3 and 4) at the end of the
spiral groove, as before described, the click L is moved over, and its end L³ being
withdrawn from the ratchet teeth, the winding is brought to an end without strain
upon the mechanism; and should the wearer of the watch still continue to turn the
pendant button, the barrel wheel turns harmlessly round upon the boss J; the easy
inotion of the button of course indicating that the watch is sufficiently wound.
For the purpose of greater facility in setting the hands of keyless watches, I form
upon the under side of the canon pinion a square, upon which I fit loosely or
otherwise a larger wheel with which the keyless mechanism gears, and carry the
minute wheel over this by means of a bridge or cock. I prefer to employ an
independent arrangement (several of which are in use) for setting the hands, and
the ratchet or trip gearing generally necessary in keyless watches may then be
dispensed with altogether, as the click L permits the pendant button and gearing
to be turned backwards.
The end L³ of click L, and also the slot G, are cut concentrically with the
pivot of the click L; but I prefer to cut the ends L³, M', and M2 of the clicks L
and M so that their tendency is to draw into the ratchet when subjected to
pressure.
I prefer to set up the spring just sufficiently to free all its coils in the barrel, and
for convenience as regards the setting up I have arranged the direction of the
spiral, so that the stud B' of the arm B (Fig. 1), works out towards the periphery
of the barrel as the watch runs down; but the direction of the spiral may bo
reversed if desired, and the other parts of the mechanism re-arranged to suit the
altered direction. In this as in other matters I have set forth what I consider to
be the best arrangement of the mechanism for general purposes, but the various
parts may of course be re-arranged, distributed, modified, or duplicated, as may
best suit the requirements of the apparatus to which my Invention is to be applied.
The disc and boss may be formed in a solid piece with the barrel arbor, and the
whole will then afford a support for a hanging barrel. I prefer to recess out the
upper side of the boss or disc to receive tho clicks and the click spring (leaving a
collet standing around the central square for strength), and to spring or otherwise
secure a cover on, so as to exclude dirt and prevent the clicks aud the click spring
working off from their pivots. The disc and boss may be fitted at either end of
the barrel. If it is desired to place them at the same end as the centre wheel,
a groove should be cut partly through the underside of the boss for the edge of the
centre wheel to run in. In cases where it is desired to omit the boss from the
upper side of the spirally grooved disc, I slightly reduce the diameter of the spiral

page_text: and form an annular groove between it and the edge of the disc, leaving the edge
of the disc as thick as the disc itself. The disc is then placed bodily in the opening
in the frame plate, and is prevented from coming through by the ratchet, the
opening in which is in this instance left somewhat smaller than the opening in the
frame-plate. For key winding watches the ratchet may conveniently consist of a
thin plate of steel provided with steady pins to drop into the frame plate beneath
the barrel bar, so that when the latter is screwed down it secures the whole
together and forms the cover for the click-work.
The arin B is curved so as to allow sufficient strength in the edge of the recessed
barrel end, and I prefer that the length of the arm B should not exceed the radius
of the barrel.
.
If desired the arm B may be fitted inside the barrel and the stud B' brought up
through a suitable slot, the end of the arm being also brought slightly up and
supported in a narrow recess carried beyond the slot on the upper side of the
barrel end; this arrangement is shown by the dotted lines A2, Fig. 1. A portion of
the arm B (shown by dotted lines, and also in the separate Drawing of the arm
in Fig. 1a) may be continued down through the barrel, and pivotted at its under-
side. Then as the arm B is moved by the spiral the inner edge of B' will be
carried nearer to or further from the centre of the barrel; and if the outer end of
the mainspring be hooked round the inner edge of B2 (the spring pulling across
the pivots of the arm) the force of the spring will be communicated to the barrel
through the arm B, which acts as a variable lever having its fulcrum at the point
where the stud B¹ is held by the spiral groove, and a means of partial adjustment
will be afforded, but although this plan may be found sufficient for very long and
slender springs, I do not consider it equal for strong springs to the one I have
previously described. The extension B may however be used in connection with
the spring D, E, Fig. 2, and it has this advantage, that if the mainspring should
break during or after the process of winding the shock will be materially
diminished, because the part B follows the mainspring up as it is wound into the
middle of the barrel, and the arm B (of which B is a part) being held by the
spiral cannot fly back, and the broken spring is therefore prevented from so
suddenly expanding, thus tending to preserve both the barrel itself and the centre
pinion from injury.
The concluding part of my Invention, which consists of a ratchet safety pinion, is
not to be regarded as essential to the parts I have already described, but is
introduced as being adapted for use in connection with a portion of them in cases
where it is desired to leave the mainspring uncontrolled in the barrel. Referring
to Fig. 5, P represents the pinion, and R the second or centre wheel of the train.
The pinion P is bored out to receive tlio arbor of the wheel R, and at the end
which lies nearest to the wheel, part of its leaves (from three to five will generally
be found sufficient) are left projecting a short distance beyond the body of the
pinion. These projecting ends P¹ are cut to the shape of ratchet teeth, and a
corresponding number of openings R' to receive them are cut at a suitable
inclination through the wheel R. A light spring S attached to the frame plate of
the watch or apparatus completes the arrangement; and as long as force is applied
in the proper direction the wheel and pinion gear closely together, but should
force be applied in the opposite direction (as in the case of the mainspring breaking)
the pinion revolves backward upon the arbor.
1 prefer that the spring S should be just free of the pinion when the latter is in
gear with the wheel, and the desired adjustment may be effected either by bending
the spring or by means of a suitable screw applied in any convenient manner.
This form of pinion can be easily made, whether right or left handed it fits close
down upon the wheel, and being used in conjunction with an efficient stop upon
the plate possesses ample strength for all that is required of it.
Having now described my Invention and the best modes known to me of
carrying the same into effect, I wish it to be understood that what I believe to bo

page_text: new and desire to protect under the herein before in part recited Letters
Patent is,-
1st. The internally or externally recessed barrel, cover, or end A, fitted with
curved arm B pivotted or otherwise retained at one end, so as to be capable of
vibrating within said recess, substantially as and for the purposes described.
2nd. The spirally grooved disc or plate F with or without boss J, substantially
as and for the purposes described.
3rd. The disc or plate F, boss .J, and barrel arbor in one solid piece as a support
for a hanging barrel when said disc and boss are in a suitable manner supported or
retained in position by the frame plate or other convenient part of the watch or
apparatus to which they are applied.
4th. The click movement, substantially as herein described and shown, in which
the click or clicks and appurtenances are carried round with the barrel arbor
inside or by means of an annular ratchet, whereby the train of wheels is partially
or entirely relieved from the strains caused by overwinding, breakage of the click
work, or the like.
5th. As a key winding mechanism the combination of spring hook D. E, arm B
(with or without the extension B), spiral plate F (with or without boss J), clicks L
and M, click spring N (with or without N), and ratchet K, all substantially as and
for the purposes set forth and shewn in the accompanying Drawings.
6th. As a keyless winding mechanism the parts, as in claim 5, in combination
with the usual toothed gearing or other essential portions of a keyless winding
movement.
7th. As a stop mechanism the combination of parts, as in claim 5.
8th. In connection with a going barrel the combination of parts, as in claim 5,
for the purpose of partially preventing the inequalities in the force of the mainspring
from being transmitted to the train of wheels.
9th. As a safety mechanism the combination of parts, as in claim 5, for the
purpose of wholly or partially preventing injuries (strains upon the train of wheels
in case of breakage of the clickwork or other accident, or in the event of undue
force being used in winding up the watch or apparatus.
10th. In a going barrel, watch, or apparatus the combination of the external
arm B, spiral disc F, J, ratchet K, clicks L and M, click spring N, pinion P and Pl,
wheel R and R', and spring S, for the purpose of lessening the liability of such
watch or apparatus to injury, whether from breakage of the mainspring, or from
failure of the parts engaged in winding.
In witness whereof, I, the said Edwin Wright, have hereunto set my hand
and seal, this Twenty seventh day of August, in the year of our Lord One
thousand eight hundred and eighty.