CH225895A - Intercom speaker system with conference operation. - Google Patents

Intercom speaker system with conference operation.

Info

Publication number
CH225895A
CH225895A CH225895DA CH225895A CH 225895 A CH225895 A CH 225895A CH 225895D A CH225895D A CH 225895DA CH 225895 A CH225895 A CH 225895A
Authority
CH
Switzerland
Prior art keywords
speaker system
conference operation
intercom speaker
intercom
conference
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellschaft C Lorenz
Original Assignee
Lorenz C Ag
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 Lorenz C Ag filed Critical Lorenz C Ag
Publication of CH225895A publication Critical patent/CH225895A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/001—Two-way communication systems between a limited number of parties
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C9/00—Potato planters
    • A01C9/08—Potato planters with other distributing devices, e.g. flaps, screws, horizontal turning plates
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
CH225895D 1941-04-25 1942-03-09 Intercom speaker system with conference operation. CH225895A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE250441X 1941-04-25

Publications (1)

Publication Number Publication Date
CH225895A true CH225895A (en) 1943-02-28

Family

ID=5937966

Family Applications (2)

Application Number Title Priority Date Filing Date
CH225895D CH225895A (en) 1941-04-25 1942-03-09 Intercom speaker system with conference operation.
CH227248D CH227248A (en) 1941-04-25 1942-03-26 Encapsulated electrical installation device.

Family Applications After (1)

Application Number Title Priority Date Filing Date
CH227248D CH227248A (en) 1941-04-25 1942-03-26 Encapsulated electrical installation device.

Country Status (4)

Country Link
BE (1) BE444965A (en)
CH (2) CH225895A (en)
FR (2) FR880655A (en)
NL (1) NL30826C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE918759C (en) * 1949-10-16 1954-10-04 Standard Elek Zitaets Ges A G Circuit arrangement for two-way speaker systems with conference operation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE918759C (en) * 1949-10-16 1954-10-04 Standard Elek Zitaets Ges A G Circuit arrangement for two-way speaker systems with conference operation

Also Published As

Publication number Publication date
FR880668A (en) 1943-04-01
BE444965A (en)
CH227248A (en) 1943-05-31
NL30826C (en)
FR880655A (en) 1943-04-01

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