DE608419C - Circuit arrangement for subscriber stations in telephone systems with dialer operation - Google Patents

Circuit arrangement for subscriber stations in telephone systems with dialer operation

Info

Publication number
DE608419C
DE608419C DENDAT608419D DE608419DD DE608419C DE 608419 C DE608419 C DE 608419C DE NDAT608419 D DENDAT608419 D DE NDAT608419D DE 608419D D DE608419D D DE 608419DD DE 608419 C DE608419 C DE 608419C
Authority
DE
Germany
Prior art keywords
circuit arrangement
telephone systems
subscriber stations
spark
dialer operation
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
DENDAT608419D
Other languages
German (de)
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
Publication date
Application granted granted Critical
Publication of DE608419C publication Critical patent/DE608419C/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)
  • Interface Circuits In Exchanges (AREA)

Description

*) Von dem Patentsucher ist als der Erfinder angegeben worden:*) The patent seeker stated as the inventor:

Alfred Pfeiffer in Falkensee.Alfred Pfeiffer in Falkensee.

Hierzu ι Blatt ZeichnungenFor this purpose ι sheet of drawings

SERUN. GEDRUCKT IN DER REICtISDRUCKEKEISERUN. PRINTED IN REICTISPRINTKEI

Claims (1)

Patentanspruch:Claim: Schaltungsanordnung für Teilnehmerstellen in Fernsprechanlagen mit Wählerbetrieb, bei denen eine Funkenbildung an den Kontakten des Gabelumschalters und des Stromstoßsenders der Teilnehmerstelle unterdrückt wird, dadurch gekennzeichnet, daß der sowohl die Kontakte des Stromstoßsenders als auch des Gabelumschalters überbrückende, aus Kondensator und Widerstand in Reihe bestehende Funkenlöschkreis durch zwei im Funkenlöschkreis liegende, zeitlich derart nacheinander wirkende Kontakte des Gabelumschalters eingeschaltet wird, daß der Funkenlöschkreis (C, Wi) als letzter geöffnet wird.Circuit arrangement for subscriber stations in telephone systems with dialer operation, in which spark formation at the contacts of the hook switch and the surge transmitter of the subscriber station is suppressed, characterized in that the spark extinguishing circuit bridging both the contacts of the surge transmitter and the hook switch, consisting of capacitor and resistor in series through two contacts of the hook-and-loop switch that are located in the spark-extinguishing circuit and which act one after the other in time such that the spark-extinguishing circuit (C, Wi) is the last to be opened.
DENDAT608419D Circuit arrangement for subscriber stations in telephone systems with dialer operation Expired DE608419C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE608419T

Publications (1)

Publication Number Publication Date
DE608419C true DE608419C (en) 1935-01-29

Family

ID=6575804

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT608419D Expired DE608419C (en) Circuit arrangement for subscriber stations in telephone systems with dialer operation

Country Status (1)

Country Link
DE (1) DE608419C (en)

Similar Documents

Publication Publication Date Title
DE608419C (en) Circuit arrangement for subscriber stations in telephone systems with dialer operation
DE362634C (en) Overcurrent protection of electrical power systems with simultaneous use of voltage and current dependent relays
DE917129C (en) Device to prevent unwanted eavesdropping on telephone calls
DE932562C (en) Cam switch in which the contact levers are pivotably mounted in a joint
DE512969C (en) Plug-in device with contact elements for connecting an earthed or zeroed line connected to the socket with a movable earth line connected to the plug
DE542437C (en) Protective device for oil-cooled electrical equipment
DE629520C (en) Circuit arrangement for telephone systems
US2088318A (en) Relay circuit
DE576288C (en) Plug contact socket for electrical plug devices
DE603263C (en) Circuit arrangement for feeding the networks of telecommunication systems, in particular telephone systems
DE375981C (en) Solder pipe for compressed gas-air mixture with electrical ignition
GB331991A (en) Improvement in radio receivers and the like
DE589312C (en) Circuit arrangement for the supply of private branch exchanges connected to telephone systems with dialer operation
GB383600A (en) Improvements in or relating to sparking plugs
DE583410C (en) Safety device for circuits in which voltage-dependent resistors are switched on
GB1207751A (en) Solders
GB221316A (en) Improvements relating to relay devices for use in automatic telephone systems
GB294885A (en) Improvements in or relating to telephone systems
GB255657A (en) Improvements in step-by-step switching apparatus for telephone systems
GB338524A (en) Improvements in or relating to arrangements for use in telephone or like systems
GB470008A (en) Improvements in electric signalling or impulse transmitting mechanism
GB201308A (en) Improvements in and relating to terminals or connections for electric conductors
AU172926A (en) Improved circuit arrangements for automatic switches used in telephone systems
GB179275A (en) Improvements in spark plugs
GB246669A (en) Improvements in connection with plug switches