US PATENT SUBCLASS 400 / 157.1
.~.~.~ Including particular structure of hammer(s)

Current as of: June, 1999
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400 /   HD   TYPEWRITING MACHINES

139  DF  INCLUDING TYPE-SET-ASSEMBLAGE MOUNTED ON CARRIER AND RELATIVELY MOVABLE FOR SELECTION AND FOR IMPACT OF TYPE-FACE {11}
153  DF  .~ Imprint by movement of record-medium against type-face {3}
154  DF  .~.~ By hammer impacting record-medium against type-face on type-head (e.g., type shuttle, etc.) {3}
157.1.~.~.~ Including particular structure of hammer(s) {3}
157.2  DF  .~.~.~.~> Electromagnetically actuated
157.3  DF  .~.~.~.~> For variable impression (e.g., impact control)
157.4  DF  .~.~.~.~> Hammer(s) mounted on endless belt or in helical array

DEFINITION

Classification: 400/157.1

Including particular structure of hammer(s):

(under subclass 154) Subject matter wherein significance is attributed to said striking member or the means for causing movement of, or supporting, said striking member.