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DE645133C
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Electromagnetic sound box
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DE672109C
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Speed change gear for devices for sound recording or sound reproduction
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DE612939C
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Pliers-like punching tool for the preparation of cam or dial disks
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DE625346C
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Device for the automatic dialing of certain subscribers of self-connection systems
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DE579268C
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Spring drive
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DE580656C
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Device for securing the mutual distance and the position of the cam disks of an automatic impulse transmitter for self-connecting telephone systems
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DE616281C
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Device for the automatic dialing of certain subscribers of self-connection systems
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DE586979C
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Device for the automatic call of certain subscribers from subscriber stations of a self-connecting telephone system
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DE517623C
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Device for setting the speed controller and for shutting down the drive on speaking machines
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DE515771C
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Device for setting the speed regulator for record speaking machines
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DE512278C
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Parking device for speaking machines
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DE578750C
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Centrifugal brake regulator, especially for speech machine drives
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