Found in a 1966 General Electric documentation, this dimmer should only be used with incandescent lamps. The Triac is according to the power of the lamp.
This circuit was found in an old American documentation. The integrated circuit used is uncommon...
SST OXY Flex Oxygen Sensor The purpose of this SST sensor is to measure oxygen level in enclosed...
Circuits similar to this can be found in this section. This is from 1967 General Electric...