BE441302A - - Google Patents

Info

Publication number
BE441302A
BE441302A BE441302DA BE441302A BE 441302 A BE441302 A BE 441302A BE 441302D A BE441302D A BE 441302DA BE 441302 A BE441302 A BE 441302A
Authority
BE
Belgium
Prior art keywords
duration
signal
toothed wheel
limiting
instrument according
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE441302A publication Critical patent/BE441302A/fr

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M11/00Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/04Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Electromechanical Clocks (AREA)
BE441302D BE441302A (enrdf_load_html_response)

Publications (1)

Publication Number Publication Date
BE441302A true BE441302A (enrdf_load_html_response)

Family

ID=98821

Family Applications (1)

Application Number Title Priority Date Filing Date
BE441302D BE441302A (enrdf_load_html_response)

Country Status (1)

Country Link
BE (1) BE441302A (enrdf_load_html_response)

Similar Documents

Publication Publication Date Title
US7245949B2 (en) Drawer-type mobile phone
US3514548A (en) Telephone apparatus for discriminating between desired and undesired calls
BE441302A (enrdf_load_html_response)
US2400085A (en) Timing mechanism
US2522726A (en) Control device for the automatic recording of telephone conversations
US2572815A (en) Illuminating attachment for telephones
US3404236A (en) Telephone automatic alarm apparatus
SU306A1 (ru) Телефонно-осведомительный аппарат
US2927160A (en) Telephone answering device
US1143270A (en) Automatic ship's bell.
US2881253A (en) Telephone answering apparatus control
US1427160A (en) Hook-switch mechanism
FR2703862A1 (fr) Dispositif d'intercommunication raccordé à un portier électronique.
FR2869156A1 (fr) Contacteur basse consommation sans bruit pour courants alternatifs et continus a large bande de voltage
US239579A (en) Telephone signaling apparatus
CH623695A5 (enrdf_load_html_response)
CN2289352Y (zh) 一种电话机
BE568079A (enrdf_load_html_response)
BE570708A (enrdf_load_html_response)
BE424605A (enrdf_load_html_response)
FR2467814A1 (fr) Dispositif pour la transmission d'une alarme dans un systeme de surveillance
SU106867A1 (ru) Рычажный переключатель телефонного аппарата центральной батареи (ЦБ)
BE473923A (enrdf_load_html_response)
BE465943A (enrdf_load_html_response)
BE425889A (enrdf_load_html_response)