US3557326A - Device for delaying the opening of the pulse contact for telephone dials - Google Patents

Device for delaying the opening of the pulse contact for telephone dials Download PDF

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Publication number
US3557326A
US3557326A US770552A US77055268A US3557326A US 3557326 A US3557326 A US 3557326A US 770552 A US770552 A US 770552A US 77055268 A US77055268 A US 77055268A US 3557326 A US3557326 A US 3557326A
Authority
US
United States
Prior art keywords
pulse train
spring
opening
pulses
cam
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 - Lifetime
Application number
US770552A
Other languages
English (en)
Inventor
Severino Tessarollo
Angelo Manzoni
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.)
Alcatel Lucent NV
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of US3557326A publication Critical patent/US3557326A/en
Assigned to ALCATEL N.V., DE LAIRESSESTRAAT 153, 1075 HK AMSTERDAM, THE NETHERLANDS, A CORP OF THE NETHERLANDS reassignment ALCATEL N.V., DE LAIRESSESTRAAT 153, 1075 HK AMSTERDAM, THE NETHERLANDS, A CORP OF THE NETHERLANDS ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: INTERNATIONAL STANDARD ELECTRIC CORPORATION, A CORP OF DE
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H04M1/34—Lost-motion or other arrangements for ensuring a pause between successive digit transmissions

Definitions

  • a telephone dialing mechanism is provided to produce a delay of two pulses duration before the beginning of the dial pulse train.
  • the present invention relates to a device for providing an initial delay in opening the pulse contact opening in telephone dialling discs. It relates more particularly to an improvement on prior art methods for effecting an idle run of said telephone dialling discs before sending out the pulse train.
  • a preferred embodiment of this invention consists of a mechanism causing an idle run of telephone dialling discs, in which the operation of an electric contact gives rise to pulse emission.
  • the idle run, before the pulse train, is effected due to the fact that the pulse fork is frictionally rotated from a single lobe cam and through a rest are corresponding approximately to one pulse period, before the drive fork attains the position preceding the start of the pulses.
  • FIG. 1 shows the starting position (with dialling disc loaded) of portions A. B, C, D, E of the device according to the invention
  • FIGS. 2, 3, 4 and 5 show the positions of portions A, B, C, D and E of the device of FIG. 1 during the next movement;
  • FIG. 6 shows the final position of the device.
  • FIG. 1 the positions of portions A, B, C, D an E of the device are shown when the dialling disc is loaded in its starting position. After releasing the dialling disc (not shown),
  • cam B begins to rotate clockwise dragging along fork C.
  • the cam B continues rotating until the extension D of l'ork C comes to bear against the short spring of contact A. This causes the fork C to stop (FIG. 2
  • cam B by continuing to rotate causes the movcment of two springs of contact A with the aid of tongue E of the short spring and this results in a clearing ofextension D.
  • the opening of the contact A which opening is the desired position, is caused by further rotation of the eccentric cam B, to given rise to the first pulse of the pulse train.
  • cam B has performed two rotations corresponding to an arc of two idle pulses, which appear before the beginning ofthe pulse train.
  • a mechanism wherein the improvement comprises a fork having two extensions applied by an eccentric cam and two contact carrying springs, one of which is a short spring having a tongue bearing against the rotating eccentric cam and the other spring is a long spring, said short spring and said long spring being separated after two revolutions of said cam.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Interface Circuits In Exchanges (AREA)
US770552A 1967-10-25 1968-10-25 Device for delaying the opening of the pulse contact for telephone dials Expired - Lifetime US3557326A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2197467 1967-10-25

Publications (1)

Publication Number Publication Date
US3557326A true US3557326A (en) 1971-01-19

Family

ID=11189612

Family Applications (1)

Application Number Title Priority Date Filing Date
US770552A Expired - Lifetime US3557326A (en) 1967-10-25 1968-10-25 Device for delaying the opening of the pulse contact for telephone dials

Country Status (8)

Country Link
US (1) US3557326A (enrdf_load_stackoverflow)
JP (1) JPS4828565B1 (enrdf_load_stackoverflow)
BE (1) BE722865A (enrdf_load_stackoverflow)
DE (1) DE6802970U (enrdf_load_stackoverflow)
ES (1) ES359452A1 (enrdf_load_stackoverflow)
FR (1) FR1585384A (enrdf_load_stackoverflow)
GB (1) GB1239038A (enrdf_load_stackoverflow)
NL (1) NL6815262A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3919494A (en) * 1973-01-11 1975-11-11 Int Standard Electric Corp Pulse contact delaying mechanism for telephone dials

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2963554A (en) * 1959-08-06 1960-12-06 Bell Telephone Labor Inc Call transmitter
US3301966A (en) * 1962-09-12 1967-01-31 Int Standard Electric Corp Call transmitter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2963554A (en) * 1959-08-06 1960-12-06 Bell Telephone Labor Inc Call transmitter
US3301966A (en) * 1962-09-12 1967-01-31 Int Standard Electric Corp Call transmitter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3919494A (en) * 1973-01-11 1975-11-11 Int Standard Electric Corp Pulse contact delaying mechanism for telephone dials

Also Published As

Publication number Publication date
ES359452A1 (es) 1970-06-01
JPS4828565B1 (enrdf_load_stackoverflow) 1973-09-03
DE6802970U (de) 1969-09-17
BE722865A (enrdf_load_stackoverflow) 1969-04-25
FR1585384A (enrdf_load_stackoverflow) 1970-01-16
GB1239038A (enrdf_load_stackoverflow) 1971-07-14
NL6815262A (enrdf_load_stackoverflow) 1969-04-29

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ALCATEL N.V., DE LAIRESSESTRAAT 153, 1075 HK AMSTE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:INTERNATIONAL STANDARD ELECTRIC CORPORATION, A CORP OF DE;REEL/FRAME:004718/0023

Effective date: 19870311