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Class Information
Number: 400/251
Name: Typewriting machines > Case-shift mechanism
Description: Subject matter wherein significance is attributed to a means in a typewriter for performing a case-shift* function by effecting relative movement between a record-medium* and a type-face* element that is at the print-point* whereby a typist is enabled to choose which one of two or more forms of character* symbols that may be imprinted by pressing a particular character key* element will be imprinted, the choice being made by the typist who presses or does not press a case-shift key.
Sub-classes under this class:
| Class Number |
Class Name |
Patents |
| 400/256 |
Actuated by toggle-linkage |
1 |
| 400/271 |
By choosing from one of a plurality of type-bars operated by a single key |
1 |
| 400/254 |
Controlled by typewriter-actuated mechanism |
1 |
| 400/257 |
For case-shift by type-head (e.g., spherical type-head) movement |
15 |
| 400/274 |
For locking case-shift mechanism in position (e.g., rebound lock, cam, etc.) |
3 |
| 400/264 |
For shifting platen |
0 |
| 400/268 |
For shifting type-face or type-bar |
1 |
| 400/253 |
Including electronic control or code-bar control |
6 |
| 400/272 |
Including key attachment for case-shift |
5 |
| 400/277 |
Including limit stop (e.g., block, chain, etc.) |
1 |
| 400/255 |
Including plural case-shift mechanisms (e.g., for simultaneous or selective use) |
2 |
| 400/252 |
Including programmed-control-system |
6 |
| 400/261 |
Multiple-shift mechanism (i.e., for type-bar having three or more type faces thereon) |
3 |
| 400/258 |
Power-operated mechanism (e.g., for locking shift key) |
5 |
Patents under this class:
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