US2740870A - Impulse-forming contact-pieces for calling dials for impulse distributors - Google Patents

Impulse-forming contact-pieces for calling dials for impulse distributors Download PDF

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Publication number
US2740870A
US2740870A US309818A US30981852A US2740870A US 2740870 A US2740870 A US 2740870A US 309818 A US309818 A US 309818A US 30981852 A US30981852 A US 30981852A US 2740870 A US2740870 A US 2740870A
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US
United States
Prior art keywords
impulse
pieces
contact
distributors
forming contact
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
US309818A
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English (en)
Inventor
Meloni Mario
Schubauer Edouard
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.)
Societe des Compteurs de Geneve SODECO
Original Assignee
Societe des Compteurs de Geneve SODECO
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 Societe des Compteurs de Geneve SODECO filed Critical Societe des Compteurs de Geneve SODECO
Application granted granted Critical
Publication of US2740870A publication Critical patent/US2740870A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H63/00—Details of electrically-operated selector switches
    • H01H63/02—Contacts; Wipers; Connections thereto
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • 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

Definitions

  • the present invention has for its object an impulseproducing contact for calling dials and impulse distributors, said contact being constituted as a multiple contact in which at least one pair of contact-pieces is made of a material having a low resistance to passage through the contact, while its wear is comparatively high, whereas at least one pair of contact-pieces is made of a material the resistance of which to the passage of current is comparatively high but wears only to a small extent, such pairs of contact-pieces wearing to a small extent serving for the making and the breaking of the circuit while the pairs of contact-pieces showing a low resistance to the passage of current provide for good operative contact.
  • Fig. 1 is a perspective view of a first embodiment of the invention, while,
  • Fig. 2 is a similar view of a second embodiment.
  • the lower contact spring 5 is stationary and carries two contact-pieces 1 and 3.
  • the upper movable contact-spring 6 is controlled by the cam 8 and carries the two other contact-pieces 2 and 4.
  • the cooperating contact-pieces, 1 and 2 on one hand, and 3 and 4, on the other, form two pairs of contact-pieces of which one is made of a material that is but little liable to wear while the other pair of contact-pieces has, on the contrary, a low resistance to the passage of current.
  • the upper contact spring is slit longitudinally, whereby the contact-pieces 2 and 4 that are carried respectively by each of the half springs 6 and 7 thus formed, cannot act on each other and the contact pressures in the two pairs of contact-pieces may be adjusted independently of each other.
  • a cam-actuated impulse producer chiefly for call dials and impulse distributors, comprising a stationary blade, two contact-pieces carried by said blade and made respectively of a material having a higher resistance to wear and a higher electrical resistance and of a material having a lesser resistance to wear and a lesser electrical resistance, two independent spring blades rigidly held at one end to extend in side by side relationship in a plane parallel with the first mentioned blade and including bent outer sections, a contact-piece carried by each of the independent springs in register with the corresponding contact-piece on the first mentioned blade and the material forming which is the same as that of the said corresponding contact-piece on the first-mentioned blade and a rotary cam adapted to engage in quick succession the outer sections of the two independent blades to provide for the successive closing of the switches formed by the corresponding contact-pieces made of the first and of the second material respectively and for their opening in the opposite sequence.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Contacts (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
US309818A 1951-09-27 1952-09-16 Impulse-forming contact-pieces for calling dials for impulse distributors Expired - Lifetime US2740870A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH2740870X 1951-09-27

Publications (1)

Publication Number Publication Date
US2740870A true US2740870A (en) 1956-04-03

Family

ID=4571412

Family Applications (1)

Application Number Title Priority Date Filing Date
US309818A Expired - Lifetime US2740870A (en) 1951-09-27 1952-09-16 Impulse-forming contact-pieces for calling dials for impulse distributors

Country Status (6)

Country Link
US (1) US2740870A (en))
BE (1) BE514232A (en))
CH (1) CH299543A (en))
DE (1) DE928297C (en))
FR (1) FR1063417A (en))
NL (1) NL172651C (en))

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2902549A (en) * 1956-08-31 1959-09-01 Executone Inf Sys Inc Multiple unit pile-up switch
US3196225A (en) * 1961-04-13 1965-07-20 Gen Motors Corp Rotary interrupter switch
US3316513A (en) * 1966-01-03 1967-04-25 Bell Telephone Labor Inc Sealed contact reed switch having contoured reeds

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US589582A (en) * 1897-09-07 Thur w
US1216420A (en) * 1914-12-01 1917-02-20 Gen Railway Signal Co Relay.
US1394087A (en) * 1918-05-17 1921-10-18 W N Matthews And Brother Inc Cut-out switch
US1954092A (en) * 1931-02-25 1934-04-10 Siemens Ag Electromagnetic switching device
US2341931A (en) * 1941-04-24 1944-02-15 Gen Electric Circuit maker and breaker
US2499420A (en) * 1946-02-19 1950-03-07 Michael J Sakatos Nonsparking switch

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR928855A (fr) * 1946-05-07 1947-12-10 Diffusions Modernes Relais téléphonique

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US589582A (en) * 1897-09-07 Thur w
US1216420A (en) * 1914-12-01 1917-02-20 Gen Railway Signal Co Relay.
US1394087A (en) * 1918-05-17 1921-10-18 W N Matthews And Brother Inc Cut-out switch
US1954092A (en) * 1931-02-25 1934-04-10 Siemens Ag Electromagnetic switching device
US2341931A (en) * 1941-04-24 1944-02-15 Gen Electric Circuit maker and breaker
US2499420A (en) * 1946-02-19 1950-03-07 Michael J Sakatos Nonsparking switch

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2902549A (en) * 1956-08-31 1959-09-01 Executone Inf Sys Inc Multiple unit pile-up switch
US3196225A (en) * 1961-04-13 1965-07-20 Gen Motors Corp Rotary interrupter switch
US3316513A (en) * 1966-01-03 1967-04-25 Bell Telephone Labor Inc Sealed contact reed switch having contoured reeds

Also Published As

Publication number Publication date
DE928297C (de) 1955-05-31
CH299543A (de) 1954-06-15
FR1063417A (fr) 1954-05-03
NL172651C (nl)
BE514232A (en))

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