| 摘要 |
1,085,770. Recording-apparatus. PORTESCAP, LE PORTE-ECHAPPEMENT UNIVERSEL S. A. Dec.14, 1965 [Jan.13, 1965], No.52957/65. Heading G1J. [Also in Division G3] In using a chrono-comparator Cr to record the rate of a timepiece movement, the record is interrupted intermittently through switching apparatus P, controlled by amplitude measuring apparatus G, whenever a binary counter Cbi signifies that the amplitude of the oscillating member of the movement has consistently fallen below a predetermined value. An electronic amplifier in the apparatus G transforms into pulses Id, Ic the "unlocking" and "drop" noises of the movement of a watch placed on a microphone M. Bi-stable and mono-stable multivibrator circuits Bo, To simultaneously produce pulses of, for example, -12V. upon receipt of a pulse Id, the former terminating upon the arrival of a pulse Ic and the latter being inverted at N. A logical circuit E 1 permits a negative pulse Ii to pass to the counter Cbi only when the duration of a standard pulse To is shorter than the interval between the pulses Id and Ic, which occurs only when the amplitude of the oscillating member is below the predetermined value. The pulses I i are counted, and, for example, each eighth pulse triggers a circuit Ti which through the electronic switch circuit P blocks the line from the microphone M to the chrono-comparator Cr, for, for example, one or two seconds to stop the recording of the rate. |
