Termination device from hairspring-hub to drive coil on two cond

Details Termination device from hairspring-hub to drive coil on two cond Termination device from hairspring-hub to drive coil on two cond

1975-06-02

1976-05-25

Jackmon, Edith Simmons

Electrical generator or motor structure

Dynamoelectric

Rotary

58 28B, 58114, 310 36, G04B 1706, G04C 304, H02K 3302

Patent

active

039584100

ABSTRACT:
The termination arrangement comprises a two conductor hairspring and/or hub arrangement in an electric watch for coupling drive pulses to a balance wheel drive coil. A metallic hairspring, which is fastened to the hub, has a conductor which is insulated from the hub and balance wheel staff or arbor. A contact - metallic washer like - member is bonded to the hairspring collet such that the contact member is electrically insulated from the hairspring colet. The contact member is, also, electrically connected with one end of the second conductor on the hairspring. And a helical type spring-conductor having less than one full turn in length is bonded to the balance wheel between the hairspring-hub arrangement and the contact member. The helical type spring at the end which is bonded to the balance wheel is electrically connected to one end of the balance wheel drive coil. The other end of the spring-conductor is maintained in electrical contact with the contact-washer member by the pressure of the spring.
In this manner, a termination arrangement is provided for a two conductor hairspring and/or hub arrangement in an electrical watch which is capable of coupling drive pulses to a balance wheel drive coil and which facilitates the removal and setting of the hairspring or balance wheel by automatically making electrical contact without requiring soldering, etc.

REFERENCES:
patent: 3553956 (1971-01-01), Schwartz et al.

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