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Publication numberUS2637987 A
Publication typeGrant
Publication dateMay 12, 1953
Filing dateFeb 18, 1947
Priority dateFeb 18, 1947
Publication numberUS 2637987 A, US 2637987A, US-A-2637987, US2637987 A, US2637987A
InventorsCharles Hill, Johns Charles K
Original AssigneeHil Jon Safety Crown Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Overload release coupling
US 2637987 A
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Description  (OCR text may contain errors)

May 12, 1953 c. HILL ET AL OVERLOAD RELEASE COUPLING 2 Sheets-Sheet 1 Filed Feb. 18. 1947 F/GcS? INVENTOR. CHHRLES HILL CHHRLES K JOHNS BY y 2, 1953 c. HILL Em. 2,637,987

OVERLOAD RELEASE COUPLING Filed Feb. 18, 1947 2 Sheets-Sheet 2 I N V EN TOR. CHHRL ES H/LL CHHRLES K. JOHNS Patented May 12, 1 953 OVERLOAD RELEASE COUPLING Charles Hill, Reno, Nev., and Charles K. Johns, New York, N. Y., assignors to Hil-Jon Safety Crown Corporation, Brooklyn, N. Y., a corporation of New York Application February 18, 1947, Serial No. 729,300

2 Claims.

This invention relates to spring winding devices and in particular to the type particularly adapted to prevent overwinding of springs in watches, toys or other appliances such as music boxes or the like.

In view of the fact that watches, and those of the very small type in particular, have a crown of limited dimension, the application of a slip catch to the crown so that the appearance of the latter will not be altered in appearance or dimensions is difficult, due to the small space available within the crown. It is an important object of the invention to provide a device of the character referred to that can be made with few parts, can be easily assembled into the watch crown, can be made a part thereof, and will provide a slip device eii'ective when the tension of the watch spring has reached a predetermined wound resistance so that further winding of the spring is prevented and so that breakage of the parts associated with the winding stem of the watch is obviated.

A further object of the invention is to provide slip-catch spring disc device which, in winding the watch rotates with the stem of the watch and at the same time may have a reverse winding motion relatively thereto to permit the crown to be wound by an oscillatory rotary movement as used by some persons in winding watches.

Still further objects of the invention are to provide a device that will permit adjustment of the tension of the spring providing counter resistance to the tension of the spring eing wound; to provide an arrangement of parts that permits assembly in minimum time and with minimum skill; to provide for an audible signal to indicate when the watch or other appliance spring is fully wound, and to provide a structure wherein the parts can be assembled without the need of eparate holding means such as screws or rivets.

With these and other objects in view, the invention comprises certain constructions hereinafter described and then particularly pointed out in the claims and preferred embodiments of our invention are illustrated in the accompanying drawings in which:

Figure 1 is a View in vertical section taken through a watch crown in which our device is incorporated,

Figure 2 is a section on the line 2-2 of Figure I,

Figure 3 is a View similar to Figure 2 showing a modified form of the invention,

Figure 4 is a section taken on the line 4-4 of Figure 3,

Figure 5 is a slightly enlarged fragmentary view in perspective showing the relation of the spring and crown parts of the device shown in Figure 3,

Figure 6 is a view similar to Figure 3 showing a further modified form of the invention, the view being taken on the line 6-6 of Figure '7,

Figure 7 is a view in cross section through a watch crown in which a ball is employed as a part of the slip catch device,

Figure 8 is an enlarged view of a side edge of a crown showing a modified form of the disc as used in Figure 7,

Figure 9 is a view in vertical cross section taken through a crown showing a modified form of the invention,

Figure 10 is an exploded view showing the parts of Figure 9 in assembly related position,

Figure 11 is a view in perspective of a winding device that may be applied to appliances other than a. watch and which a spring tension adjustment feature is incorporated,

Figure 12 is a bottom plan view of the device shown in Figure 11 with parts being illustrated in section, and

Figure 13 is a section on the line l3-i3 of Figure 12 showing the arrangement of the parts.

Referring to the drawings in detail, a crown cap C common to all the forms of the invention as used in a, watch, may be, as illustrated in Figure 2, provided with an annular ledge l0 constituting a supporting shoulder for a sealing plate H through which extends the winding stem i2 which carries at its upper end, a. rectangular disc 13 whose corners are rounded as at M to decrease wear. The ledge H! is notched as at l5 to provide pockets into Which the ends of short spring strips are positioned, the strips being indicated as at l6 and being of suitable tempered metal. The disc [3 fits between the spring strips I 5 with its fiat sides abutting the springs so that the crown and stem are revolved as a unit in winding of the watch until the watch spring is fully wound when the strips it will yield as indicated in the outline position of Figure 2 to permit the crown to revolve without damage to the watch parts and with suflicient snap to warn the winder that the watch has been completely wound.

In Figure 3, the crown C is provided with an annular ledge I8 provided with an outwardly opening cylindrical pocket 19 in which is im prisoned a looped end 20 of a spring strip 2!. This strip is shaped to provide a support arm sec tion 22 which hugs the Wall formed by the ledge rests on the ledge l8 and is held in place, as in Figure 1, by the peening over of the lower edge of the crown as at 26. The plate is provided with a central opening through which passes the winding stem 2! which forms a part of a slipcatch spring disc of circular shape provided on its periphery with spaced recesses or notches or seats 3| into which en ages the looped catch end 24 of the spring strip 2|. The relative variation of the length of the support arm 22 and the yield arm 23 provide means for decreasing or increasing the winding efiort of the winding device. The

shorter the yield arm 23, the greater the resistance to lift of the loop end .24 out of the seat of the disk and the greater the effort that may be put into winding the watch or appliance spring. In this form of the device the parts are hand assembled and after the crown is peened, the de vice is complete.

In the device shown in Figures 6 and 7, the crown C has secured thereto in ,any suitable ma ner, such as by pins 35, ,a ring .36 provided with a ball seat 37, the ring being spaced as at .38, from the inner wall of the crown to provide a well in which is positioned a strip spring 48 having a loop M removably positioned in an open-sided pocket formed in the .inner wall of the crown as at 42. The spring 48 is shaped to provide a support section and a yield section it, 44, respectively which may be varied in relative length to produce the necessary resistance to at raising movement of a ball positioned in the seat if? and projecting inwardly of said ring 36 to engage the periphery of a slip catch disc 46. The disc is provided with one or more peripheral recesses 41 shouldered as at 48 so that the ball in the position shown in Figure 6 will be yieldably held in any recess 4'! .until the winding movement of the crown, produces at the winding stem and its associated disc 46, sufiicient resistance to rotary motion to cause the ball to rise against the resistance of spring M] and ratchet over the periphery of the disc with an audible click to warn that the spring is fully wound. In a slightly modified form of disc and ring combination as set forth for Figures 6 and 7, the ring 50, in Figure 8 may be channelled as at 5.! so that it can be dropped centrally into the crown and then secured in place as desired. This channel will maintain the spring in parallel relation to the disc.

In the form of the invention shown in Figures 9 and 10, the crown C is provided with a central pin 53 which may be rivet headed as at M and which cooperates with a dowel pin 55 to maintain a spring disc 55 within the crown. The disc 56 of suitably tempered sp ing steel or other metal is ridged laterally as at, 5B and adjacent the periphery thereof is dimpled as at 5'! to provide projections which coact with recesses or openings 59 in a winding disc 60 positioned within the crown. The disc 60 is centrally recessed as at iii to receive a washer, gasket or sealing disc 62 made of felt, cork or composition and impregnated with a suitable moisture proofing compound. The disc 62 may be made of charnois or other suitable material and when the parts are assembled as shown in Figure 9 and the lower edge of the crown peened over the winding disc as at 63 and the edges of the sealing disc 62, the crown is rendered moisture and dust proof. The winding stem 64 and disc 60 are made in a unit and when the resistance of the Wound watch ,spring is sufiicient, the spring disc 56 will rotate independently of the winding disc 60,, to prevent overwinding of the which. spring. Notch 55A receives dowel 55. p

In the form of the invention shown in Figures 11 to 13, the device is particularly adapted to heavier spring wound appliances than watches and consists of the winder shaft 65 having formed integrally therewith a cup 66, the wall 61 of which is provided with a ball seat 68 in which a ball 69 rests and protrudes to the inner sideof the wall. Within the cup 66 is positioned a disc 10 having one or more recesses H in the periphery thereof with which the ball engages to yieldably transfer the winding motion of the winder shaft 65 to the shaft 12 to be wound. The ball is urged against the periphery of the disc 10 by the free end of a strip spring 13 which passes about an arcuate portionof the cup 66 and is attached to the cup in the-slot l5. The winding shaft 65 has secured thereto a cap 76 having an arcuate shaped apron Tl depending about the side of the spring 13 and adjustable in rotary direction with respect to said spring to cover or uncover varying portions of the free end thereof so that the tension of said free end may be varied in accordance with the tension of the spring being wound. The cap is adjustable by use of the set screw '58, which engages the shaft 65.

While we have described what we consider to be highly desirable embodiments of our inven. tion, it is obvious that many changes in form could be made without departing from the spirit of the invention, and we, therefore, do not limit ourselves to the exact form herein shown and described, nor to anything less than the whole of our invention as hereinbefore set forth and as hereinafter claimed.

What we claim as new and desire to secure by Letters Patent is:

1. In a spring winding device, a hollow winding crown shaped to provide an annular ledge about the inner periphery thereof, a cylindrical well in said ledge opening at one side into the hollow interior of said crown, said ledge presenting a vertical wall, a sealing plate supported on said ledge and secured thereto by a peened-over edge of said crown, a winding stem extending through said sealing plate and having a disc portion associated therewith and disposed in the hollow intericr of said crown, the peripheral edge of said disc being notched and being spaced from the vertical wall of said ledge to provide a spring space, a strip spring having looped ends, one of which is disposed in said well to removably' position the strip spring in said space and the other of which engages the notched edge of said disc, and said spring being shaped to provide a wall abutting support arm portion and a free yield arm portion for yieldably connecting the crown and the winding stem disc.

2. In a spring Winding device, a hollow winding crown shaped to provide an annular wall and shoulder portion about the inner periphery thereof, a cylindrical well in said shoulder portion, opening at one side through the wall and into the hollow interior of said crown, a sealing plate supported on said shoulder and secured thereto by the peened-over edge of the crown, a

winding stem extending through said sealing plate and having a disc portion associated therewith and disposed in the hollow interior of said crown, the peripheral edge of said disc being notched and being spaced from said wall to provide a spring space, a strip spring having a looped end disposed in said well to removably position the strip spring in said space, means associated with the free end of said spring and urged thereby into yieldable engagement with the 5 notched edge 01' said disc and said spring being shaped to provide a, wall abutting support arm portion and a. free yield arm portion for yieldably connecting the crown and the winding stem disc.

CHARLES HILL.

CHARLES K, JOHNS.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 310,860 Field Jan. 13, 1885 Number 10 Number

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US310860 *Jan 13, 1885 Assigjvob of oxe-half
US1404816 *May 13, 1920Jan 31, 1922Wegstein Joseph CGear wheel
US1904681 *Oct 6, 1930Apr 18, 1933J A Sexauer Mfg Co IncSpring connection
US2017591 *Jun 27, 1934Oct 15, 1935Dumm Edwin JVibration cushioning driving device
US2288955 *Sep 23, 1940Jul 7, 1942Advance Machine CoOperating knob or handle for shafts and the like
US2311230 *Apr 7, 1942Feb 16, 1943Charles HillSpring winding device
US2366257 *Nov 9, 1943Jan 2, 1945Parker Appliance CoHand-operated tube cutter
GB200759A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2837902 *Jul 12, 1956Jun 10, 1958Millard Sr Edward JMechanical torsional vibration damper
US2854830 *May 14, 1956Oct 7, 1958Gorton George Machine CoSafety clutch
US3019595 *Aug 6, 1958Feb 6, 1962Kurt MurrleInertia wound watch with overwind preventer
US3027180 *Oct 14, 1957Mar 27, 1962Deere & CoClutch for grain drill
US4107634 *Nov 24, 1976Aug 15, 1978Weinschel Engineering Co.Detent mechanism especially for microwave drum attenuator
US4241534 *Feb 14, 1979Dec 30, 1980Mattel, Inc.Toy vehicle with spring drive mechanism
US4284315 *Apr 16, 1979Aug 18, 1981Williams Robert AChaff-flare test adapter connecting and disconnecting apparatus
US4287974 *Oct 17, 1979Sep 8, 1981Coin Acceptors, Inc.Clutch assembly for vending control system
US4317253 *Feb 19, 1980Mar 2, 1982The Singer CompanyRotary brush drive protector
US4460078 *Dec 10, 1981Jul 17, 1984Heide Charles HTorque release clutch
US4610340 *Oct 31, 1983Sep 9, 1986Vorwerk & Co. Interholding GmbhOverload safety on clutches
US5031742 *Jan 29, 1987Jul 16, 1991Helmut DischlerOverload clutch with automatic disengagement
US5099970 *May 10, 1991Mar 31, 1992Diebel Manufacturing CompanyTorque-limiting clutch brake assembly
US5160006 *Jul 15, 1991Nov 3, 1992Helmut DischlerOverload clutch with automatic disengagement
US5386897 *May 27, 1993Feb 7, 1995Yang; Tai-HerDelay restoring type limit-torque coupling mechanism
US5415256 *Oct 12, 1993May 16, 1995Diebel Manufacturing Co.Friction type torque-limiting clutch brake which splits into halves for easy replacement
US5473961 *Oct 29, 1993Dec 12, 1995Pepco Water Conservation ProductsFor a work object
US5480015 *Oct 3, 1994Jan 2, 1996Yang; Tai-HerDelay restoring type limit-torque coupling mechanism
US5672110 *Sep 28, 1992Sep 30, 1997Ntn CorporationTorque limiter having automatic reset function
US5694629 *May 1, 1995Dec 2, 1997Eastman Kodak CompanyFilm transport mechanism with torque limiting clutch
US5788014 *Nov 13, 1995Aug 4, 1998Graco Children's Products Inc.Motor mechanism for child's swing
US5799716 *Dec 23, 1996Sep 1, 1998Sanwa Shutter CorporationElectric-powered shutter apparatus for a building opening
US6234904 *Jan 4, 2000May 22, 2001Kabushiki Kaisha Toyoda Jidoshokki SeisakushoDrive power transmission apparatus
US6283870Nov 12, 1996Sep 4, 2001Graco Children's Products Inc.Motor mechanism for child's swing
US6439091 *Apr 19, 1999Aug 27, 2002Black & Decker Inc.Clutch mechanism
US6471024 *Mar 29, 2001Oct 29, 2002Kabushiki Kaisha Toyoda Jidoshokki SeisakushoTorque limiting mechanism
US7118064 *May 23, 2005Oct 10, 2006Societe BicFrictional clutch for torque-restricted torsional power transmission between two reels of a hand-held device
US7384190Apr 5, 2005Jun 10, 2008Meco SaCrown for timepiece with disconnecting gear device
US7533842 *Mar 31, 2005May 19, 2009Kabushiki Kaisha Tokai-Rika-Denki-SeisakushoWebbing retractor
US7845475 *May 19, 2006Dec 7, 2010Her Yuan Chyun Co., Ltd.Controller for magnetic wheels
US7934673Mar 10, 2005May 3, 2011Kabushiki Kaisha Tokai-Rika-Denki-SeisakushoWebbing take-up device
US7959352Oct 10, 2008Jun 14, 2011Meco S.A.Timepiece crown including an uncoupling mechanism
US7980503Aug 26, 2010Jul 19, 2011Kabushiki Kaisha Tokai-Rika-Denki-SeisakushoWebbing take-up device
US8142070Mar 24, 2011Mar 27, 2012Meco S.A.Timepiece crown including an uncoupling mechanism
US8602639 *Mar 17, 2011Dec 10, 2013Meco S.A.Winding crown for a timepiece
US8646586Jun 1, 2011Feb 11, 2014John CatrintaTorque-limiting clutch brake
US20110228646 *Mar 17, 2011Sep 22, 2011Meco S.A.Winding crown for a timepiece
US20120122387 *Nov 17, 2010May 17, 2012International Automotive Components Group North America, Inc.Air Outlet For Vehicle Applications
US20120252585 *Nov 2, 2010Oct 4, 2012Hilti AktiengesellschaftTorque coupling
CN1989463BApr 5, 2005Aug 4, 2010梅科股份公司Crown for timepiece, and the timepiece
DE1101297B *Dec 8, 1954Mar 2, 1961Mueller Schlenker FaRastkupplung fuer Uhren
DE1142138B *Aug 20, 1957Jan 3, 1963Epple Kg Otero UhrenSchutzvorrichtung gegen das UEberspannen der Triebfeder bei Selbstaufzugsuhren
DE1260905B *Nov 29, 1965Feb 8, 1968Brac A GVorrichtung zum Umsetzen von Drehschwingungen in gleichsinnige Drehbewegungen, insbesondere zum Fortschalten von Zeitmessinstrumenten
DE1283066B *Nov 29, 1965Feb 20, 1969Brac AgFederhebelrastgesperre mit doppelseitig eingreifenden Rastsperren
DE3603672A1 *Feb 6, 1986Aug 13, 1987Dischler HelmutSchaltbare und selbsttaetig abschaltbare ueberlastkupplung, insbesondere fuer handwerkzeuge
DE3636302A1 *Oct 24, 1986Apr 28, 1988Steinel Gmbh & Co KgOverload coupling
DE102009046475A1 *Nov 6, 2009May 12, 2011Hilti AktiengesellschaftDrehmomentkupplung
EP0108930A2 *Oct 12, 1983May 23, 1984Vorwerk & Co. Interholding GmbHOverload protection in couplings
EP1197672A1 *Mar 28, 2001Apr 17, 2002Kabushiki Kaisha Toyota JidoshokkiPower transmission mechanism
EP1422146A1 *Nov 22, 2002May 26, 2004Société BICFrictional clutch for torque-restricted power transmission between two reels of a hand-held device
EP1586960A1 *Apr 14, 2004Oct 19, 2005Meco S.A.Crown for a watch with a disconnecting mechanism
WO1997018392A1 *Nov 12, 1996May 22, 1997Graco Childrens Prod IncMotor mechanism for child's swing
WO2004048206A1 *Oct 14, 2003Jun 10, 2004Bic SocFrictional clutch for torque-restricted torsional power transmission between two reels of a hand-held device
WO2005111741A1 *Apr 5, 2005Nov 24, 2005Meco Sa GrenchenCrown for timepiece, comprising a disengaging device
Classifications
U.S. Classification464/37, 968/36, 984/204, 464/35, 464/23, 185/43, 368/209, 267/158, 192/56.1
International ClassificationF16D7/00, G10F1/06, G04B3/00, F16D7/02, G04B3/06, G10F1/00
Cooperative ClassificationG10F1/06, F16D7/02, G04B3/06
European ClassificationF16D7/02, G10F1/06, G04B3/06