GB301424A - Improvements in or relating to impulse senders of the finger disc type - Google Patents

Improvements in or relating to impulse senders of the finger disc type

Info

Publication number
GB301424A
GB301424A GB34944/28A GB3494428A GB301424A GB 301424 A GB301424 A GB 301424A GB 34944/28 A GB34944/28 A GB 34944/28A GB 3494428 A GB3494428 A GB 3494428A GB 301424 A GB301424 A GB 301424A
Authority
GB
United Kingdom
Prior art keywords
shaft
dial
speed
worm
regulator
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
GB34944/28A
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of GB301424A publication Critical patent/GB301424A/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)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

301,424. Telefonaktiebolaget L. M. Ericsson. Nov. 29, 1927, [Convention date]. Applied by speed responsive devices.-In impulse transmitters of the finger-hold type for telephone systems and in which the shaft of the speed-regulator is driven by worm gearing, the shaft is displaced axially during the setting of the dial so that the braking device of the regulator is inoperative. The dial and worm-wheel 6 are locked on a common shaft, and during the setting of the dial the worm-shaft 26 of the speed regulator moves downwardly in bearings 28, so that a brake at the upper end of the shaft 26 is put out of action. When the dial comes to rest at the set position, the shaft 26 over-runs the worm-wheel 6 and is thus raised to its normal position. The speed regulator comprises weights 33 pivoted to a collar 34 on the shaft and, during the return movement of the dial, the upper ends of the weights engage a concave braking surface 32 with substantially constant pressure. The frictional reaction varies with the speed of the shaft 26 as the weights 33 swing outwardly due to centrifugal action.
GB34944/28A 1927-11-29 1928-11-27 Improvements in or relating to impulse senders of the finger disc type Expired GB301424A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE301424X 1927-11-29

Publications (1)

Publication Number Publication Date
GB301424A true GB301424A (en) 1929-09-26

Family

ID=20307433

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34944/28A Expired GB301424A (en) 1927-11-29 1928-11-27 Improvements in or relating to impulse senders of the finger disc type

Country Status (3)

Country Link
BE (1) BE356228A (en)
FR (1) FR664666A (en)
GB (1) GB301424A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2774823A (en) * 1951-12-21 1956-12-18 Maynez Pedro Salinas Selective electrical dialing system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2774823A (en) * 1951-12-21 1956-12-18 Maynez Pedro Salinas Selective electrical dialing system

Also Published As

Publication number Publication date
FR664666A (en) 1929-09-06
BE356228A (en)

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