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DE730965C
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Device for adjusting the tension of torsion springs arranged in the hollow axis of rotation of an electrical switch
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DE731506C
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Device for regulating the cooling water supply in refrigeration machines
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DE731924C
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Switch with synchronous motor drive for controlling electrical spot welding machines
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DE737147C
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Electrical control device for compressed air accumulators
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DE675388C
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Fire protection with melting strips
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DE703449C
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Lid lock for switch boxes
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DE697961C
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Hand switch hanging at the end of a cable
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DE733888C
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Electric air protection
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DE706188C
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Electrical switch with changeable contact pieces
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DE684360C
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Multi-pole thermal overcurrent trip device
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DE685678C
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Arrangement for arbitrary loading of an electrical network
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DE652106C
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Gate valve
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DE648853C
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Automatic control of a cooling machine
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DE628274C
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Regulation of a number of cooling rooms
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DE632867C
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Defrost switch for electrical cooling systems
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DE655091C
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Start relief control for electrically driven machines, especially compressors
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DE676629C
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Electrical control switch controlled by a membrane with pulse contacts
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DE659864C
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Three-pole contactor for connecting consumers to three-phase networks
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DE630597C
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Bimetal snap switch controlled by electrical heating
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DE611749C
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Control of switching and control elements by means of electrically heated thermostats
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