Classifications

• • G—PHYSICS
  • G04—HOROLOGY
  • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
  • G04C21/00—Producing acoustic time signals by electrical means
  • G04C21/16—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times
  • G04C21/20—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times by closing a contact to ring an electromechanical alarm
  • G04C21/205—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times by closing a contact to ring an electromechanical alarm by the hand(s) or handlike members closing the contact
• • G—PHYSICS
  • G04—HOROLOGY
  • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
  • G04C21/00—Producing acoustic time signals by electrical means
  • G04C21/16—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times
  • G04C21/30—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times with provision for a number of operations at different times, e.g. ringing the bells in a school
  • G04C21/305—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times with provision for a number of operations at different times, e.g. ringing the bells in a school by the hand(s) or handlike members closing the contacts

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=4549289

Family Applications (1)

Country Status (1)

• 1947
  • 1947-01-03 FR FR938956D patent/FR938956A/fr not_active Expired

Similar Documents