GB1141887A - Improvements relating to telephone dial switch mechanisms - Google Patents

Improvements relating to telephone dial switch mechanisms

Info

Publication number
GB1141887A
GB1141887A GB2576566A GB2576566A GB1141887A GB 1141887 A GB1141887 A GB 1141887A GB 2576566 A GB2576566 A GB 2576566A GB 2576566 A GB2576566 A GB 2576566A GB 1141887 A GB1141887 A GB 1141887A
Authority
GB
United Kingdom
Prior art keywords
drive shaft
telephone dial
engages
slot
spring
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
GB2576566A
Inventor
Kenneth Frederick Elliott
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries 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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB2576566A priority Critical patent/GB1141887A/en
Publication of GB1141887A publication Critical patent/GB1141887A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Transmission Devices (AREA)

Abstract

1,141,887. Impulse transmitters. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. 12 April, 1967 [9 June, 1966], No. 25765/66. Heading H4K. A telephone dial-type impulse transmitter is provided with a one-way clutch comprising two members aligned on a drive shaft and separated by a washer-like spring which has two projections, one of which engages in a slot in one member while the other acts as a pawl cooperating with ratchet teeth on the other member. As shown, the spring which may be of metal or acetal resin is in the form of an incomplete annulus, one end of which is turned outwardly as at 5b and engages a slot 4a in the member 4 which is rigidly secured to the drive shaft (not shown), while the other end 5a is turned outwardly as shown and forms a pawl which co-operates with ratchet teeth 7 on a member 3 freely rotatable on the drive shaft. The member 3 may be connected to a speed governor of the eddy-current type as described in Specification 1,072,906 or to an impulsing contact unit. The members 3 and 4 may be moulded from thermoplastics material.
GB2576566A 1966-06-09 1966-06-09 Improvements relating to telephone dial switch mechanisms Expired GB1141887A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2576566A GB1141887A (en) 1966-06-09 1966-06-09 Improvements relating to telephone dial switch mechanisms

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2576566A GB1141887A (en) 1966-06-09 1966-06-09 Improvements relating to telephone dial switch mechanisms

Publications (1)

Publication Number Publication Date
GB1141887A true GB1141887A (en) 1969-02-05

Family

ID=10232939

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2576566A Expired GB1141887A (en) 1966-06-09 1966-06-09 Improvements relating to telephone dial switch mechanisms

Country Status (1)

Country Link
GB (1) GB1141887A (en)

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