Electrical timer signalling circuit - has rotary carrier with hourly markings and adjustable contact closing unit
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Automatic telephone answering appts. - has circuit testing whether message has been recorded on cassette for answering call before operational mode switch can be operated
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Plastic encased portable timer - sound buzzer at predefined times marked on card inserted in timer
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READING DEVICE FOR MEDICAL EXAMINATION EQUIPMENT
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Telephone call answering machine - has locking bar linked to replay-record switch to prevent switch-on without cassette
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METHOD OF PREPARATION OF MEASURING LIQUIDS
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DEVICE FOR SEPARATING AND MEASURING SAMPLE COMPONENTS
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Mode selector for tape recorder - has rocker with two opposed operating studs engaging in slots in slide
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Electronic control device for photographic exposure factors
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Sound recording and reproduction unit - has two driving motors for speed and direction control with second motor mounted on reciprocating arm
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Sound recording and reproducing apparatus
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DEVICE FOR AUTOMATIC TELEPHONE ANSWERING
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Handheld photoelectric appliance for testing liquids
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Method of preparing measuring liquids
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Optical tester for adjacent samples of liquid - uses reflectors for incident and emergent light beams with photoelectric detector
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Electronic control device for cameras with exposure control - has logarithmic setting or measuring device with system to subdivide reference resistor in in control circuit
