GB1298546A - Keyboard for a business machine - Google Patents
Keyboard for a business machineInfo
- Publication number
- GB1298546A GB1298546A GB33998/71A GB3399871A GB1298546A GB 1298546 A GB1298546 A GB 1298546A GB 33998/71 A GB33998/71 A GB 33998/71A GB 3399871 A GB3399871 A GB 3399871A GB 1298546 A GB1298546 A GB 1298546A
- Authority
- GB
- United Kingdom
- Prior art keywords
- key
- keystems
- magnet
- supported
- shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J5/00—Devices or arrangements for controlling character selection
- B41J5/08—Character or syllable selected by means of keys or keyboards of the typewriter type
- B41J5/14—Construction of key levers
Landscapes
- Push-Button Switches (AREA)
- Input From Keyboards Or The Like (AREA)
Abstract
1298546 Electric switches NATIONAL CASH REGISTER CO 20 July 1971 [7 Aug 1970] 33998/71 Heading H1N [Also in Division B6] A keyboard includes at least one key 22, 24 supported on two keystems 16 slidable in parallel support plates 10, 12, each keystem 16 engaging a respective cam as at 114, 115 for key 24, the cams being coupled together by shaft 110 to ensure that the keys 22, 24 remain parallel to plate 10 while being depressed. Key 22 is supported on three keystems 16a, 16c, (16b, Fig. 3, not shown) engaging respective cams 96, 98, (97) coupled together in pairs by shaft 88 and a link (100, Fig. 3). Depression of a key results in the operation of a reed contact unit 82 by a magnet 85 by removal of a shield or shunt 60 from between the contact unit and the magnet.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US6203770A | 1970-08-07 | 1970-08-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1298546A true GB1298546A (en) | 1972-12-06 |
Family
ID=22039816
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB33998/71A Expired GB1298546A (en) | 1970-08-07 | 1971-07-20 | Keyboard for a business machine |
Country Status (10)
Country | Link |
---|---|
US (1) | US3715023A (en) |
JP (1) | JPS5119373B1 (en) |
AU (1) | AU448829B2 (en) |
BE (1) | BE770814A (en) |
CA (1) | CA940834A (en) |
CH (1) | CH523545A (en) |
DE (1) | DE2138135B2 (en) |
FR (1) | FR2103833A5 (en) |
GB (1) | GB1298546A (en) |
ZA (1) | ZA714929B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4071719A (en) * | 1976-07-22 | 1978-01-31 | Illinois Tool Works Inc. | Keyboard switch assembly having actuator interlocking keyboard shift and shift lock and release mechanism |
GB1591986A (en) * | 1976-09-21 | 1981-07-01 | Dobson Park Ind | Typewriters |
US4295012A (en) * | 1980-02-04 | 1981-10-13 | Illinois Tool Works Inc. | Secretarial shift mechanism for an electric keyboard |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3292761A (en) * | 1965-11-04 | 1966-12-20 | Navigation Computer Corp | Typewriter key lever and mount therefor |
-
1970
- 1970-08-07 US US00062037A patent/US3715023A/en not_active Expired - Lifetime
-
1971
- 1971-06-29 CA CA117,018A patent/CA940834A/en not_active Expired
- 1971-07-20 GB GB33998/71A patent/GB1298546A/en not_active Expired
- 1971-07-23 ZA ZA714929A patent/ZA714929B/en unknown
- 1971-07-30 DE DE2138135A patent/DE2138135B2/en not_active Withdrawn
- 1971-07-30 JP JP46057463A patent/JPS5119373B1/ja active Pending
- 1971-08-02 FR FR7128199A patent/FR2103833A5/fr not_active Expired
- 1971-08-02 BE BE770814A patent/BE770814A/en unknown
- 1971-08-02 AU AU31880/71A patent/AU448829B2/en not_active Expired
- 1971-08-06 CH CH1159071A patent/CH523545A/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
CH523545A (en) | 1972-05-31 |
US3715023A (en) | 1973-02-06 |
FR2103833A5 (en) | 1972-04-14 |
DE2138135B2 (en) | 1978-10-26 |
DE2138135A1 (en) | 1972-02-10 |
ZA714929B (en) | 1972-04-26 |
AU448829B2 (en) | 1974-05-30 |
BE770814A (en) | 1971-12-16 |
JPS5119373B1 (en) | 1976-06-17 |
AU3188071A (en) | 1973-02-08 |
CA940834A (en) | 1974-01-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
746 | Register noted 'licences of right' (sect. 46/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |