GB1170076A - A Device for preventing the use of a Telephone when Dialling a Number which begins with the Digit 0 - Google Patents

A Device for preventing the use of a Telephone when Dialling a Number which begins with the Digit 0

Info

Publication number
GB1170076A
GB1170076A GB4975666A GB4975666A GB1170076A GB 1170076 A GB1170076 A GB 1170076A GB 4975666 A GB4975666 A GB 4975666A GB 4975666 A GB4975666 A GB 4975666A GB 1170076 A GB1170076 A GB 1170076A
Authority
GB
United Kingdom
Prior art keywords
impulse
digit
handset
dial
nov
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
GB4975666A
Inventor
Christos Antoni Stathacopoulos
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1170076A publication Critical patent/GB1170076A/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
    • H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
    • H04M1/677—Preventing the dialling or sending of predetermined telephone numbers or selected types of telephone numbers, e.g. long distance numbers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Lock And Its Accessories (AREA)

Abstract

1,170,076. Impulse transmitters. C. A. STATHACOPOULOS. 7 Nov., 1966 [26 Nov., 1965], No. 49756/66. Heading H4K. In an impulse transmitter provided with two auxiliary, dial-operated spring sets, one set is operated during wind-up in the event that the initial digit " 0 " is dialled so as to cause the impulse contacts to be short circuited until the handset is replaced, while the other set is operated during the return-motion so as to cause the first set to be inoperative during subsequent operations of the dial in all cases where the first digit dialled is other than a " 0." Each spring set controls a self-holding relay which performs the necessary switching to provide the above features. The first set's relay additionally short circuits the handset when it is operative. A lockable three-pole switch is provided for (a) short circuiting the relays, whereby an authorized caller may make a call having any initial digit, (b) short circuiting the impulse contacts, whereby no outgoing calls can be made or (c) providing the " 0 "-calls barred feature.
GB4975666A 1965-11-26 1966-11-07 A Device for preventing the use of a Telephone when Dialling a Number which begins with the Digit 0 Expired GB1170076A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GR650029106 1965-11-26

Publications (1)

Publication Number Publication Date
GB1170076A true GB1170076A (en) 1969-11-12

Family

ID=10927178

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4975666A Expired GB1170076A (en) 1965-11-26 1966-11-07 A Device for preventing the use of a Telephone when Dialling a Number which begins with the Digit 0

Country Status (3)

Country Link
DE (1) DE1268215B (en)
GB (1) GB1170076A (en)
SE (1) SE328334B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BG37515A1 (en) * 1983-02-02 1985-06-14 Popov Device for limiting telephone dial selection
BG37516A1 (en) * 1983-03-14 1985-06-14 Popov Device for limiting telephone dial selection
DE3622712A1 (en) * 1986-07-05 1988-01-21 Neumann Elektronik Gmbh Method for blocking a telephone device for outgoing calls in telephone systems with pulse- and/or frequency dialling and dialling block the for carrying out the method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE645061C (en) * 1934-02-11 1937-05-20 Int Standard Electric Corp Circuit for telephone systems with dialer operation
DE933276C (en) * 1953-02-19 1955-09-22 Siemens Ag Telephone number switch with blocking of certain initial digits
DE1000872B (en) * 1955-06-04 1957-01-17 Fernsprecher Ges M B H Deutsch Telephone number switch with a device preventing the dialing of traffic elimination digits by a blocking contact
DE1029420B (en) * 1957-04-02 1958-05-08 Lorenz C Ag Number switch for telephone systems with blocking of the first digit of a telephone number
BE636631A (en) * 1962-08-28

Also Published As

Publication number Publication date
DE1268215B (en) 1968-05-16
SE328334B (en) 1970-09-14

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