US PATENT SUBCLASS 400 / 154
.~.~ By hammer impacting record-medium against type-face on type-head (e.g., type shuttle, etc.)

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.~.~ By hammer impacting record-medium against type-face on type-head (e.g., type shuttle, etc.) {3}
154.1  DF  .~.~.~> Including selection of type-face {8}
157  DF  .~.~.~> Including type-faces arranged along helical path(s)
157.1  DF  .~.~.~> Including particular structure of hammer(s) {3}

DEFINITION

Classification: 400/154

By hammer impacting record-medium against type-face on type-head (e.g., type shuttle, etc.):

(under subclass 153) Subject matter wherein the record-medium* is moved to a type-face* that is supported by a type-head* by means of a striking member that imparts to the record-medium a sudden movement toward the selected or chosen type-face.