SE7407345L - - Google Patents
Info
- Publication number
- SE7407345L SE7407345L SE7407345A SE7407345A SE7407345L SE 7407345 L SE7407345 L SE 7407345L SE 7407345 A SE7407345 A SE 7407345A SE 7407345 A SE7407345 A SE 7407345A SE 7407345 L SE7407345 L SE 7407345L
- Authority
- SE
- Sweden
- Prior art keywords
- latch
- handset
- contact
- hook
- causes
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/30—Devices which can set up and transmit only one digit at a time
- H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
- H04M1/312—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses pulses produced by electronic circuits
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
Abstract
1411910 Number sending devices; telephone instruments PYE Ltd 15 Feb 1974 [8 June 1973] 27392/73 Headings H4K and H4J In a push button telephone instrument, depression of any push button causes the operation of a contact via a mechanical link and the contact is held in the operated position by means of a latch which is released either by replacement of the handset or by the operation of an electromagnet. Push buttons 35 are associated with electronic circuity 3 for producing loop disconnect dialling pulses as in Specification 1,195,141 or alternatively multifrequency tones and each button is coupled mechanically to a member 18 for operating the various off-normal contacts 11-17. With the handset on-hook the various mechanical members are positioned as shown. When the handset is lifted the cradle hook 25 pivots to bring its end 28 into contact with block 31 and latch 36 pivots under the action of spring 23 to keep its end 24 in contact with end 28 of the cradle hook. If a push button is now depressed member 34 moves laterally to displace member 18 to the right such that projection 19 moves along surface 36 of the latch and finally latches against surface 22, thereby holding the contacts 11-17 operated. At the end of the dialling sequence other electronic circuitry 3 causes an electromagnet 32 to operate causing latch 36 to pivot clockwise and to release the projection 19. The contacts return to the unoperated state and remove the short circuits on the transmitter and receiver. Should the subscriber replace his handset before the dialling sequence is completed, end 28 of the cradle hook causes the latch to be released.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2739273A GB1411910A (en) | 1973-06-08 | 1973-06-08 | Push button telephone instruments |
Publications (1)
Publication Number | Publication Date |
---|---|
SE7407345L true SE7407345L (en) | 1974-12-09 |
Family
ID=10258849
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE7407345A SE7407345L (en) | 1973-06-08 | 1974-06-05 |
Country Status (8)
Country | Link |
---|---|
JP (1) | JPS5431765B2 (en) |
BE (1) | BE816008A (en) |
CA (1) | CA1001787A (en) |
DE (1) | DE2427584A1 (en) |
FR (1) | FR2232889B1 (en) |
GB (1) | GB1411910A (en) |
IT (1) | IT1011936B (en) |
SE (1) | SE7407345L (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53109915A (en) * | 1977-01-29 | 1978-09-26 | Kureha Chem Ind Co Ltd | Preparation of anti-tumor polysaccharides |
JPS53109914A (en) * | 1977-01-29 | 1978-09-26 | Kureha Chem Ind Co Ltd | Preparation of anti-tumor polysaccharides |
JPS53109922A (en) * | 1977-01-29 | 1978-09-26 | Kureha Chem Ind Co Ltd | Preparation of anti-tumor polysaccharides |
DE3037947C2 (en) * | 1980-10-08 | 1983-01-05 | Krone Gmbh, 1000 Berlin | Key for dialing when the handset is on-hook using a keyboard and for open listening |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2818558A (en) * | 1954-06-17 | 1957-12-31 | Bell Telephone Labor Inc | Key pulsing circuit |
US3614331A (en) * | 1968-09-30 | 1971-10-19 | Mkh Inc | Keyboard pulse generator including a locking plate for use in telephone dialing |
-
1973
- 1973-06-08 GB GB2739273A patent/GB1411910A/en not_active Expired
-
1974
- 1974-06-05 SE SE7407345A patent/SE7407345L/ not_active Application Discontinuation
- 1974-06-06 BE BE145157A patent/BE816008A/en unknown
- 1974-06-07 IT IT6880574A patent/IT1011936B/en active
- 1974-06-07 DE DE19742427584 patent/DE2427584A1/en active Pending
- 1974-06-07 CA CA201,891A patent/CA1001787A/en not_active Expired
- 1974-06-08 JP JP6551974A patent/JPS5431765B2/ja not_active Expired
- 1974-06-10 FR FR7419948A patent/FR2232889B1/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5034103A (en) | 1975-04-02 |
BE816008A (en) | 1974-12-06 |
CA1001787A (en) | 1976-12-14 |
GB1411910A (en) | 1975-10-29 |
FR2232889B1 (en) | 1977-09-30 |
FR2232889A1 (en) | 1975-01-03 |
IT1011936B (en) | 1977-02-10 |
DE2427584A1 (en) | 1975-01-02 |
JPS5431765B2 (en) | 1979-10-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NAV | Patent application has lapsed |
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