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
Application number
SE7407345A
Other languages
Unknown language ( )
Inventor
J F Wren
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
Publication of SE7407345L publication Critical patent/SE7407345L/

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/26Devices for calling a subscriber
    • H04M1/30Devices which can set up and transmit only one digit at a time
    • H04M1/31Devices 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
    • H04M1/312Devices 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.
SE7407345A 1973-06-08 1974-06-05 SE7407345L (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
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)

* 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
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)

* 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
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

Similar Documents

Publication Publication Date Title
SE7407345L (en)
US4536622A (en) Remote telephone on-hook, off-hook control and indication circuit
US2218328A (en) Telephone set
US3358087A (en) Telephone instrument dialing control device
ES475760A1 (en) Apparatus for transmitting characters, applicable to a push button telephone set.
US2972021A (en) Telephone substation apparatus
JPS5772452A (en) Telephone set with speaker receiving function
US1956360A (en) Telephone instrument
US2147710A (en) Call transmitter
US2212216A (en) Telephone set
US1894828A (en) Substation telephone set
US2319321A (en) Magnetic dial
GB2151433A (en) Telephone switch device
US2412624A (en) Telephone call transmitter
GB898198A (en) An arrangement for calling frequently wanted subscribers in an automatic telephone system
GB852198A (en) Improvements in or relating to apparatus for sending signals indicative of the values of coins inserted into a coin operated telephone instrument, to a control device inan automatic telephone exchange
US3524939A (en) Intercommunicating telephone with secrecy arrangement
US3761639A (en) Telephone dials
GB2023966A (en) Telephone subscriber's apparatus
GB1490869A (en) Subscriber station for telephone systems
US3488449A (en) Code transmitter
GB190726251A (en) Improvements in Telephone Systems.
GB2199212A (en) Telephone
US1327412A (en) Telephone
GB738714A (en) Improvements in or relating to telephone instruments

Legal Events

Date Code Title Description
NAV Patent application has lapsed

Ref document number: 7407345-3

Format of ref document f/p: F