Typewriting Machines Patents (Class 400)
- For typing on a book (Class 400/24)
- For typing on flat blueprint or drawing (e.g., "platenless" typewriter) (Class 400/29)
- For typing on carton or package (Class 400/30)
- By multidirectional movement of typewriter structure (e.g., "Elliot-Fisher" structure) (Class 400/31)
- Bottom-strike typewriter including type-bar action or bar platen or anvil platen (Class 400/32)
- Top-strike typewriter including pivoted type-bar (Class 400/33)
- Including carriage-return mechanism (Class 400/34)
- Including case-shift by shifting platen (Class 400/35)
- Including ribbon-feed mechanism (Class 400/36)
- For typing on manifold set (e.g., with type-die, etc.) (Class 400/37)
- Including feed of tally strip (Class 400/43)
- Including line-spacing mechanism (Class 400/44)
- Work support (e.g, sheet or card holddown or guide, sheet-size platen, etc.) (Class 400/48)
- Collating-table attachment (Class 400/49)
- Including means for responding to input program or incoming signals and providing output program or signals representing typing operations (e.g., output typewriter) (Class 400/62)
- Including editing or revision system (Class 400/63)
- Including right-hand margin control system (Class 400/64)
- Including typing of graphical representations (Class 400/65)
- Including baseplate attachment with electromagnets for input or output operations (Class 400/66)
- Separate interrelated programs (Class 400/67)
- Type-face selection via magnetic program tape (Class 400/69)
- Plural typewriters coupled for simultaneous operation (e.g., "master-slave" relationship) (Class 400/71)
- Including character-selection latches (e.g., for type-face selection) (Class 400/72)
- Including particular reader structure and operation (Class 400/73)
- Including error detection (Class 400/74)
- Including type-bar selection using mechanical program (Class 400/75)
- Including type-faces movable relative to type-face-carrier (Class 400/140)
- Including endless-band carrier for type-faces (Class 400/146)
- Type-faces arranged in rectilinear row and selected by reciprocable movement (Class 400/147)
- Plural type-heads mounted for selective individual type-head-imprinting movement (Class 400/149)
- Type drum having multiple type-set-assemblages (Class 400/152)
- Imprint by movement of record-medium against type-face (Class 400/153)
- Imprint by pivoting of type-head-carrier and type-head against record-medium (Class 400/160)
- Plural type-set-assemblages selectively movable from a storage station to a printing station (Class 400/171)
- Type-faces mounted on type chips and removable from storage for printing (Class 400/172)
- With means for exposing last-typed character (Class 400/173)
- Type-head, per se (Class 400/174)
- Moved by continuously rotating power drive intermittently applied (Class 400/192)
- Inking device handheld during typing (Class 400/193)
- Endless ribbon or cartridge therefor (Class 400/194)
- Renovation of used ribbon (Class 400/197)
- Ribbon disposed within platen (Class 400/203)
- For typing plural copies simultaneously with ribbon(s) (e.g., duplicate typing) (Class 400/204)
- Package for ribbon facilitating mounting of ribbon on typewriter (e.g., ribbon cartridge) (Class 400/207)
- For bottom-strike typewriter (Class 400/209)
- For boldface typing (Class 400/210)
- Including mechanism for shifting ribbon laterally at print-point (Class 400/211)
- Ribbon-reversing mechanism (Class 400/218)
- Ribbon-feeding mechanism (Class 400/223)
- Ribbon, per se (Class 400/237)
- Ribbon spool or mount therefor (Class 400/242)
- Means auxiliary to ribbon mechanism (e.g., shield, guide, etc.) (Class 400/247)
- Including programmed-control-system (Class 400/252)
- Including electronic control or code-bar control (Class 400/253)
- Controlled by typewriter-actuated mechanism (Class 400/254)
- Including plural case-shift mechanisms (e.g., for simultaneous or selective use) (Class 400/255)
- Actuated by toggle-linkage (Class 400/256)
- For case-shift by type-head (e.g., spherical type-head) movement (Class 400/257)
- Power-operated mechanism (e.g., for locking shift key) (Class 400/258)
- Multiple-shift mechanism (i.e., for type-bar having three or more type faces thereon) (Class 400/261)
- For shifting platen (Class 400/264)
- For shifting type-face or type-bar (Class 400/268)
- By choosing from one of a plurality of type-bars operated by a single key (Class 400/271)
- Including key attachment for case-shift (Class 400/272)
- For locking case-shift mechanism in position (e.g., rebound lock, cam, etc.) (Class 400/274)
- Including limit stop (e.g., block, chain, etc.) (Class 400/277)
- For stopping carriage in tabular position (e.g., column-set positions) (Class 400/284)
- With rotatable type wheel for repeat printing in response to carriage movement (Class 400/299)
- Key-actuated mechanism for nonfeed of carriage (e.g., "silent" key, locking carriage, etc.) (Class 400/300)
- For varying carriage feed (Class 400/303)
- Carriage backspace mechanism (Class 400/308)
- Carriage-return mechanism (Class 400/313)
- Carriage-feed mechanism (e.g., escapement, etc.) (Class 400/319)
- Carriage-retarder mechanism (Class 400/337)
- Margin-regulator (e.g., adjustable margin-stop) mechanism (Class 400/342)
- Carriage, per se, or guideway therefor (Class 400/352)
- Means for repositioning carriage or platen thereon (Class 400/355)
- Including electromagnetic return of universal actuator (Class 400/360)
- Including actuator to complete depression of selected key or key lever (Class 400/361)
- Including universal actuator to actuate selected type-bar action (Class 400/362)
- Including individual solenoids to actuate the selected type-bar action (Class 400/364)
- Including jam-release means (Class 400/366)
- Interposed components driven by filter shaft (Class 400/367)
- For repeat-type action (Class 400/368)
- Via continously rotated power roll (Class 400/370)
- Via limited-rotation clutch (Class 400/377)
- Via spring drive (e.g., spring-driven snatch roll) (Class 400/379)
- Via reciprocating common actuator (Class 400/382)
- Spring drive for type-bar action (Class 400/384)
- With added-motion mechanism for type-bar near print-point (Class 400/385)
- With end-thrust mechanism for type-bar (Class 400/390)
- With type-bar pivot traveling during typing movement of type-bar (Class 400/394)
- With disconnection of type-bar action during movement thereof (Class 400/397)
- With accelerated (e.g., motion amplifying)type-bar action (Class 400/398)
- For bottom-strike typewriter (Class 400/408)
- For top-strike typewriter (Class 400/415)
- Type-bar action (Class 400/422)
- Type-bar rebound preventer (e.g., via latch, brake, linkage, etc.) (Class 400/435)
- Type-bar return spring connected to type-bar-action linkage (Class 400/436)
- Type-bar pivot support (Class 400/441)
- Type-bar structure (Class 400/452)
- Type-bar rest or rest support (Class 400/454)
- Type-bar or type-member guide structure (Class 400/456)
- Type-member structure (Class 400/462)
- Dust guard for type-bar action mechanism (Class 400/467)
- Attachment to type-bar for imprinting extra character (Class 400/469)
- Ink-impregnated type-face or inker for type-face (Class 400/470)
- Including mechanism (e.g., auxiliary key-board) for activating keys (Class 400/473)
- Including means generating a signal for type selecting or other typing function (Class 400/477)
- Including control of key action (e.g., buffer, etc.) (Class 400/480)
- For stenographic typewriter (Class 400/482)
- For Braille typewriter (Class 400/483)
- For foreign-language typewriter (Class 400/484)
- Key-board having multiple-character, multiple-movement keys (Class 400/485)
- Key-board arranged according to character location (Class 400/486)
- Key-board including row of keys having different heights (Class 400/488)
- Key-board including keys grouped to facilitate positioning of typist's fingers (Class 400/489)
- Key-cap or key-stem structure (Class 400/490)
- Key lever or space-bar mounting structure (e.g., dust guard, buffer, pivot, etc.) (Class 400/496)
- Including prevention of full imprint on "carbon copy" record-medium (Class 400/498)
- On record-medium wound around platen together with carbon paper (Class 400/499)
- With means for causing slack in web of manifold set (Class 400/500)
- By use of other than rectangular sheet carbon paper (e.g., disc, etc.) (Class 400/503)
- By multicolor carbon paper (Class 400/505)
- With means to prevent creep (e.g., relative movement) between record-media (Class 400/506)
- Including means for creep feed of carbon paper (Class 400/507)
- Including spool or support for roll of carbon paper (Class 400/508)
- Including relative movement between carbon paper and record-medium (Class 400/513)
- Carbon paper holder (e.g., loading board, etc.) (Class 400/520)
- Flexible holder fed around platen with single card (Class 400/522)
- On card pierced or indented to aid holding (Class 400/523)
- Holder movable responsive to case-shift (Class 400/524)
- Card holder carrier by platen (Class 400/525)
- Including line-spacing of holder or card (Class 400/531)
- Including support engaging bottom edge of card (Class 400/535)
- Card holder mounted on typewriter frame (Class 400/536)
- Including a feed-roller (Class 400/541)
- Card holder mounted on platen-carriage frame (Class 400/542)
- Including gripper or means urging card against platen (Class 400/543)
- Backing for stencil cutting (e.g, CELLULOID™ strip, etc.) (Class 400/544)
- To facilitate condensed billing (i.e., by determining a desired limit or amount of retrograde or advance platen movement) (Class 400/546)
- Actuated by key on key-board (Class 400/549)
- For multi-incremental rotation (e.g., "platen sweep") (Class 400/550)
- For line-spacing in forward or reverse direction (Class 400/551)
- With "floating" platen (Class 400/552)
- Via line-space / carriage-feed-release actuator (Class 400/553)
- For facilitating even wear of platen surface (e.g., by irregular increments, etc.) (Class 400/554)
- By irregular increments of platen rotation (e.g., for adjustment of platen relative to its actuator, etc.) (Class 400/555)
- By electric-power drive (Class 400/568)
- By gear train (e.g., including a clutch) (Class 400/569)
- By double-cam drive (Class 400/570)
- By friction drive (e.g., including regulation of increments) (Class 400/571)
- By pawl and ratchet wheel drive (Class 400/572)
- Via foldable line-space actuator (Class 400/576)
- With means to prevent reverse rotation or ensure full increment (e.g., for "backlash" prevention) (Class 400/577)
- Including skew correction responsive to position of sheet or web (Class 400/579)
- Including forming indicia on record-medium during typing to find next line to be typed (Class 400/580)
- Including programmed-control-system for record-medium feed (e.g., on auxiliary record) (Class 400/582)
- Including feed of plural record-media arranged side-by-side (e.g., fed independently of platen) (Class 400/584)
- Including feed of tally strip record-medium (e.g., plural tally strips) (Class 400/586)
- Including insertion of sheet from front of platen (e.g., for "condensed billing", via sheet guide, etc.) (Class 400/595)
- For feeding plural record media concurrently or selectively (Class 400/605)
- For feeding web record-medium (Class 400/611)
- With holder for single sheet (e.g., clip, backing sheet, etc.) (Class 400/622)
- For feeding sheet from stack or pack holder (Class 400/624)
- Including aligning of sheet edge prior to typing (Class 400/630)
- Including friction-feed means (e.g., band) (Class 400/634)
- Including sheet guide (e.g., for sheet insertion, etc.) (Class 400/642)
- For interlocking plural functions or mechanisms (Class 400/664)
- Key-board lock using interlock mechanism (Class 400/667)
- Locking means actuated in response to a condition (Class 400/668)
- For locking carriage in centered position (e.g., with shipping support) (Class 400/674)
- Key-board security lock (e.g., cover plate, etc.) (Class 400/676)
- For locking selected group(s) of keys (Class 400/677)
- For locking key in actuated position (e.g., to remove type-face from ink pad) (Class 400/678)
- Means for collapsing typewriter or support for record-medium or copy (Class 400/680)
- Buffer (e.g., dashpot, of particular material, etc.) for movable typewriter element (Class 400/686)
- Means for increasing typewriter noise (Class 400/688)
- Means for muffling typewriter noise (Class 400/689)
- Frame, casing, or support for typewriter (Class 400/691)
- Means for correcting typing errors (e.g., by abrasive eraser, etc.) (Class 400/695)
- Means for cleaning, or facilitating cleaning of, type-face (Class 400/701)
- Indicator means (Class 400/703)
- Attachment for shielding or screening record-medium or typewriter (e.g., against wind, etc.) (Class 400/713)
- Attachment for guiding fingers or hands of typist (e.g., hand rest) (Class 400/715)
- Attachment for illuminating or viewing (e.g., prism, etc.) (Class 400/716)
- Attachment for holding an article (e.g., pencil, eraser, etc.) (Class 400/717)
