CA1001787A - Telephone instruments - Google Patents

Telephone instruments

Info

Publication number
CA1001787A
CA1001787A CA201,891A CA201891A CA1001787A CA 1001787 A CA1001787 A CA 1001787A CA 201891 A CA201891 A CA 201891A CA 1001787 A CA1001787 A CA 1001787A
Authority
CA
Canada
Prior art keywords
telephone instruments
instruments
telephone
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
Application number
CA201,891A
Other versions
CA201891S (en
Inventor
James F. Wren
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pye Electronic Products Ltd
Original Assignee
Pye Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Pye Ltd filed Critical Pye Ltd
Application granted granted Critical
Publication of CA1001787A publication Critical patent/CA1001787A/en
Expired legal-status Critical Current

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)
CA201,891A 1973-06-08 1974-06-07 Telephone instruments Expired CA1001787A (en)

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
CA1001787A true CA1001787A (en) 1976-12-14

Family

ID=10258849

Family Applications (1)

Application Number Title Priority Date Filing Date
CA201,891A Expired CA1001787A (en) 1973-06-08 1974-06-07 Telephone instruments

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)

* Cited by examiner, † Cited by third party
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
JPS53109922A (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
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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
FR2232889A1 (en) 1975-01-03
FR2232889B1 (en) 1977-09-30
IT1011936B (en) 1977-02-10
SE7407345L (en) 1974-12-09
DE2427584A1 (en) 1975-01-02
JPS5034103A (en) 1975-04-02
GB1411910A (en) 1975-10-29
BE816008A (en) 1974-12-06
JPS5431765B2 (en) 1979-10-09

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