GB389661A - Improvements in and relating to dial switches - Google Patents

Improvements in and relating to dial switches

Info

Publication number
GB389661A
GB389661A GB10836/32A GB1083632A GB389661A GB 389661 A GB389661 A GB 389661A GB 10836/32 A GB10836/32 A GB 10836/32A GB 1083632 A GB1083632 A GB 1083632A GB 389661 A GB389661 A GB 389661A
Authority
GB
United Kingdom
Prior art keywords
dialled
emission
prevented
cams
initial
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
GB10836/32A
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.)
Fuld & Co Telephon
Original Assignee
Fuld & Co Telephon
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 Fuld & Co Telephon filed Critical Fuld & Co Telephon
Publication of GB389661A publication Critical patent/GB389661A/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)
  • Switch Cases, Indication, And Locking (AREA)
  • Transmission Devices (AREA)
  • Transmitters (AREA)

Abstract

389,661. Impulse transmitters. FULD & CO. TELEPHON-UND TELEGRAPHENWERKE AKT.-GES., H., 136, Mainzerlandstrasse, Frankfort-on-Main, Germany. April 15, 1932, No. 10836. Convention date, Oct. 22, 1931. Addition to 383,166. Drawings to Specification. [Class 40 (iv).] The dial transmitter described in the parent Specification for mechanically preventing the emission of impulses when a predetermined one or two-digit member is dialled, is modified so that the emission is prevented both for one or more single digits and one or more multidigit numbers. As described, emission is prevented when the initial digits 9 or 00 are dialled and this is effected by a modification of the contours of the cams described in the parent Specification.. Further, when any initial digit is dialled, one of the cams remains off-normal to close a circuit for giving an indication that the transmitter is in use.
GB10836/32A 1931-04-13 1932-04-15 Improvements in and relating to dial switches Expired GB389661A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE383166X 1931-04-13
DEF72077D DE641077C (en) 1931-04-13 1931-10-23 Number switch for self-connection systems with mechanical prevention of current impulses after choosing certain digits

Publications (1)

Publication Number Publication Date
GB389661A true GB389661A (en) 1933-03-23

Family

ID=25872302

Family Applications (2)

Application Number Title Priority Date Filing Date
GB9884/32A Expired GB383166A (en) 1931-04-13 1932-04-06 Improvements in and relating to dial switches
GB10836/32A Expired GB389661A (en) 1931-04-13 1932-04-15 Improvements in and relating to dial switches

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB9884/32A Expired GB383166A (en) 1931-04-13 1932-04-06 Improvements in and relating to dial switches

Country Status (3)

Country Link
DE (1) DE641077C (en)
GB (2) GB383166A (en)
NL (1) NL36070C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3284578A (en) * 1963-02-11 1966-11-08 Earl R Evans Direct-dialing long-distance telephone systems

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1005761B (en) * 1951-12-12 1957-04-04 Askania Werke Ag Device for the continuous determination of the moisture content of materials running through an air-drying system, in particular material webs
DE1901692A1 (en) * 1969-01-15 1970-08-13 Standard Elek K Lorenz Ag Arrangement for controlling the establishment of a connection in telecommunication systems, in particular telephone systems, from a coin operated telephone set

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3284578A (en) * 1963-02-11 1966-11-08 Earl R Evans Direct-dialing long-distance telephone systems

Also Published As

Publication number Publication date
GB383166A (en) 1932-11-10
DE641077C (en) 1937-01-19
NL36070C (en)

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