US1707542A - Staff and jewel mounting for watches - Google Patents

Description

April 2, 1929. L, p. SIGLER 1,707,542

STAFF AND JEWEL MOUNTING FOR WATCHES Filed May 51, 1927 Patented Apr. 2, 1929.

i UNlTED STA'l'S LOUG-I SIGLER, OF DLLAS, TEXAS.

STAFF AND JEWEL MGUNTING FR lVATCI-IES.

Apgcation filed May 31,

This invention relates to new and useful impro 'emen'ts in statt and jewel mountings for watches.

The object of the invention is to provide a mounting' for the balance stall et a watch which will be yieldable so that the jewels forming the bearings will not be cracked or broken from sudden shocks or are.

A iurthcr object of the invention is to provide a mounting t'or each end et the balance stall' comprising bearing members arranged to undergo, relatively oil the balance sta-tl, both a longitudinal and a 'transverse or lateral movement, thus yielding` in all directions.

ll. still turther object oi' the invention is te provide a mounting for each end or a balance stall including a pair et jewels, each mounted in indi 'idual members andv said members being so arranged as to undergo longitudinal and lateral movements under the influence oi single spring element, thus obviating the necessity of providing a springl element for each individual jewel niounting member'.

Another object oi the invention is to pro-- vide a jewel n'iountin, comprising; a pair oi resiliently sustained inter-meshing` jewel mounting members so arranged as to maintain their intermeshed relation and positive contact while undergoing the various movements.

A construction designed to carry out the invention will be hereinafter described, together with other features of the invention.

The invention will be more readily understood from a reading` oi' the 'following speci- `iication and by reference to the accompanying drawings7 in which an example of the invention is shown and wherein:

Fig. l is a vertical sectional view oi a portion of a watch movement showing` the bal ance statt' and jewel mountings constructed in accordance with my invention,

Fig. 2 is a plan view ot one el the mountings,

l? 3 is an underside View olf the cap jewel mounting member,

Fig'. 4lis a plan view oi the mounting meniber tor the perforated ewel7 and Fig. 5 is a sectional detail slmwing,l portions et the mounting; members in displaced relation.

ln the drawings, which are, oi necessity, shown upon a greatly enlarged scale, the numeral l designates the lower plate of the 1927. Serial llo. 195,325.

watch movement and ll the upper bracket vito' supporting` the upper end et the balance stail i2, the plate and bracket being provided with circular recesses 13 for the reception oi the jewel bones ll in which the mounting members are'coniined.

As the mechanism in each jewel box is substantially the same a description oi one-will suiiice 'lier both, and the bei; which is inserted in the recess i3 of the bracket ll will be used.V The box has a cylindrical body with one end open and the other end closed by a circular plate l overhanging` the body and provided with a central or axial opening` 1G. V'lhe opening 'lo is considerably larger in diameter than the pivot 17 et the stall' l2. The plate l5 has a collar 18 surroudingl the opening li and the staff l2 has a shoulder l) over-banning the pivot i7. dhis shoulder is adapted to the collar and limit the longitudinal thrust et the stati. y

lllithin the bei; is arranged an annular jewel-mounting member 2O in the center ot whicl'i the usual perforated jewel 22 is suitably seeured. il second annular je vel-mount ing member 23 is also disposed in the bei; in contact with the member O and has mounted therein the usual cap jewel 2li. rlhe pivot 17 has a reduced spindle 25 extending through the perforated jewel 22 and bearing agains' the ewel Q/i in the usual manner.

A spring tension member or disk 2G is i" stoned on the bracket ll by a pair ot screws 2'2" and is provided with a central opening 28. Spring lingers 2l) are bent down ifi-ous the disk on diametrieally opjviosite sid s so as to bear on topot the cap member 23 on each side oi its central opening. lhe bei; may be cut away at ll to permit the lingers to ireely fieri. The disk is cut out around these lingers so as to permit said lingers to readily yield. t will be noted that the cap member lits comparatively snug within the box lil, but has the major portion ot its periphery bevelled so as to reduce 'lrictional contact with'the circular wall of the box. By reason ot the spring lingers 2li) the cap member may move longitudinally et the boia when displaced by a longitudinal ine-vement oit the stall7 thus yielding te an end thrust when said cap member not designed `to undergo lateral jdisplacement.

@ne of the very important features oi the invention is the intermeshing relation between tlie jewel-mounting members 23. The member 2O is somewhat less in diameter than the member 23 so as to be free to undergo a lateral movement. The member 20 has a V-shaped groove 30 and the member 23 has a V-sbaped annular' bead or bess 81 conforming to and litting into said groove so that the adjacent surfaces of the mounting members may cont-act if' desired. The lingers 2D hold the member 23 in contact with the member 2() and the latter in contact with the inner side of the plate 14, whereby both members are resiliently sustained, by a single spring device or element.

It Will be apparent that a side thrust of tbe member 20 will cause the inclined Walls ot the groove 30 to ride along the inclined walls oic the boss 31, thus displacing the member 23 longitudinally with relation to the statt' 12 and the member 2O laterally with relation tothe stati, as is indicated in Fig. 5. Such a movement of the two members permits the balance stati' to move longitudinally at the same time it. is moving` laterally and its movement thus becomes universal, whereby any thrust is resiliently taken up and the staif is cushioned the result oi a sudden shock or jar, thereby being saved `from rupture, injury or breaking.

The single spring element and the intermeshing engagement o1nA the mounting members is practical and simple and reduces to a minimum the number of parts employed, as well as making for substantiability and easy assembly. The other bonr 14 which is inserted in the recess 13 of 'the plate 10 has the same thrust absorbing members, but the collar 18 is omitted 'from the plate 15 and the plate 15 is not countersunk, as is the c se where it is mounted in the bracket 11. HOW ever, the plate 15 of the other boX forms a bumper for the small roller 32 which on the stati' 12 and thus limits the end thrust of the stall?. It will be seen that the boxes 14 and the springdisks 2G can be readily applied to the plate and bracket of a Watch movement Withoutan expensive operation and may be easily removed when necessary.

The jewel member 20 may be referred to as the inner jewel-mounting member, While the member 23 may be referred tor as the cap jewel-mounting member.

Various changes in the size and shape ot the dili'erent parts, as well as moditieatimis and alterations, may be made Within the scope of the appended claims.

lhat l claim, is:

1. ln a pivot bearing device :for a watch balance stati), an inner jewel-mounting member mounted to bodily move laterally, a cap jewel-mounting member intermeshing with the adjacent face o'f the inner member and normally holding the inner member in position and against lateral movementrelatively thereoi, and resilient means acting axially oi the staii:l 'ter enga the cap je 7elmounting with the inner mounting and constituing the sole resilient sustaining means for both member 2. In a pivot bearing device ler a watch balance stati?, a jewel box having a central opening for receiving a balance stall and a bumper surrounding said opening lor limitingl the end 'thrust et the balance stall, an inner enel-mounting member carrying a perforated jewel and disposed within said boi; 'i'or lateral movement, a cap jewel-mounting member carrying a cap jewel and mounted in said bei; for longitudinal movement and restrained against lateral movement, the cap jewel member having sliding iiitcrmeslziim' engagement with the inner member whereby the outer member is displaced longitudinalljv by a lateral movement of the inner member, and a spring member acting axially oi the stati Yfor engaging the cap member for yieldably sustaining both of the jewel mountiiig membe s in Contact.

3. In a pivot bearing device for a Watch balance stall?, an inner jewel-mounting mem ber having a perforated jewel and provided with a il-shaped groove, a cap jewel-mounting member provided with a cap jewel and having a tf-shaped boss engaging in the groove ot' the inner member, and i. spring disk having lingers tensioning the cap member into interloeked engagement with the inner membe Il. ln a pivot bearing device tor a watch balance st an irmer jew ill-mounting member mounted for 'lree lateral movement, a cap jcwel-mminting member intermeshing with the inner member and retaii'ied against lateral movement but movable upon the inner member longitudinally oit the stall". and means for yi eldingly retaining the cap member in conlact with the inner member to elect opposite movements o'l" said members by pressure t ansmittcd from one to the other In testimony whereof I aliix my signature.

LOUGH l). SIGLE?.

Images