| 摘要 |
CONTACTLESS PULSE SHAPING DEVICE FOR PRIMARY CLOCKS EMITTING POLARISED PULSES TO A LINE OF SECONDARY CLOCKS NO^RMALLY PROVIDED WITH CONTACTS WHICH REQUIRE CONSTANT SUPERVISION AND PERIODIC CLEANING. THE PROPOSED DEVICE COMPRISES A SEMICONDUCTOR TRIODE IN THE RELAY CIRCUIT CONTROLLED BY CONTACTS OPERATED BY A CAM AND A SECTOR MOUNTED COAXIALLY ON THE CLOCK DRIVING SHAFT. SUCH CONSTRUCTION IMPROVES THE RELIABILITY OF CLOCK OPERATION. THE DEVICE IS SUPPLIED FROM A D.C SOURCE (1) OF THE ORDER OF 24V. THE RELAY WINDING (2) AND THE ELECTROMAGNETIC WINDING (3) OF THE PENDULUM DRIVE ARE SHUNTED BY GERMANIUM DIODES (4). THE RESISTOR (5) IN THTE CONTACT (6) CIRCUIT LIMITS THE TRANSISTOR (7) BASE CURRENT. THE GERMANIUM DIODE (8) SHUNTS THE TRANSISTOR AND PROTECTS IT AGAINST DAMAGE BY ACCIDENTAL CHANGES OF POLARITY. THE ELECTROLYTIC CAPACITOR (9) SMOOTHES THE CURRENT FALL IN THE SECONDARY CLOCK CIRCUIT. THE TRANSISTOR IS CONTROLLED BY THE CONTACTS OPERATED BY THE CAMS (10) OF THE SECOND DISC AND THE CONTACTS (11) OPERATED BY THE SECTOR (12) CONTROL THE RELAY.
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