US PATENT SUBCLASS 968 / 426
WINDING MECHANICAL CLOCKS ELECTRICALLY (winding mechanically subclass 23; electrical winding of spring-driven arrangements for gramophones G11B 19/20) [G04C 1/00]


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968 /   HD   HOROLOGY

426WINDING MECHANICAL CLOCKS ELECTRICALLY (winding mechanically subclass 23; electrical winding of spring-driven arrangements for gramophones G11B 19/20) [G04C 1/00] {5}
427  DD  .~> By electrothermal or electro-pneumatic arrangements [G04C 1/00B]
428  DD  .~> For clock systems (subclasses 429-434 take precedence) [G04C 1/00F]
429  DD  .~> By electromagnets [G04C 1/02] {3}
434  DD  .~> By electric motors with rotating or with reciprocating movement [G04C 1/04] {2}
443  DD  .~> Protection against overwinding (in mechanical clocks or watches subclasses 16, 36, 38, 66, and 71) [G04C 1/10] {2}