| 摘要 |
An electronically controlled pipe valve magnet is disclosed. The valve magnet is a solenoid which activates a movable armature to open and close the air flow passageway between a pipe organ wind chest and an individual pipe. The pipe valve is electronically operated by means of a control circuit mounted directly on the solenoid by means of a circuit board which is easily accessible and which may be quickly replaced in the event of circuit failure. The electronic control circuit allows the relatively high solenoid currents to be switched by means of a relatively small control signal, thereby reducing the size and weight of the control cable leading from a keyboard console to the numerous pipe valves in a wind chest. The control circuit is economical and safe for use in a wind chest, and, since relatively low control currents are required, a large number of magnets can be operated directly from a single key contact.
|
