摘要:
A process for producing a variable resistance device by intermittently advancing a strip of electrically conductive material through a plurality of work stations. Portions of the conductive material are bent to form a plurality of guides. A substrate element having a resistance track and a conductive track formed on a first surface thereof is placed onto the conductive material, the guides maintaining the substrate element accurately positioned. Preselected ones of the guides are bent into overlapping relation with the first surface of the substrate element and are thereafter permanently affixed in position. The preselected ones of the guides form termination tabs for the terminal pins of the resistance device.
摘要:
A combined potentiometer and switching structure including wiper contacts fixed to a shaft and having contacting engagement with an annular resistor and a pair of switching rings. The wiper contacts are located coincident, or in phase relation. The switching rings are each provided with an interrupted area, such areas are located in an arc complemental to the arc of the resistor and are circumferentially spaced apart a distance not greater than the length of the resistor contacting surface whereby, during rotation of the shafts, circuits connected to the switch rings are opened at different positions with respect to the resistor wiping contact. An annular supporting ring formed of electrical insulation material and provided with a central rib projecting from the inner surface thereof serves as a convenient mounting for the switch rings.
摘要:
A combined potentiometer and switching structure including wiper contacts fixed to a shaft and having contacting engagement with an annular resistor and a pair of switching rings. The wiper contacts are located coincident, or in phase relation. The switching rings are each provided with an interrupted area, such areas are located in an arc complemental to the arc of the resistor and are circumferentially spaced apart a distance not greater than the length of the resistor contacting surface whereby, during rotation of the shafts, circuits connected to the switch rings are opened at different positions with respect to the resistor wiping contact. An annular supporting ring formed of electrical insulation material and provided with a central rib projecting from the inner surface thereof serves as a convenient mounting for the switch rings.
摘要:
A potentiometer having a hollow housing containing a continuous recessed shoulder and a pair of axially spaced recessed cavities adjacent opposite ends thereof. A lead screw and associated wiper element are disposed within the housing. An axially extending resistance element and a parallel collector track are deposited on a substrate member. A plurality of electrical terminals having spring clip portions are clipped to the terminations of the resistance element and to the collector track to make electrical contact therewith. The resistance substrate is positioned in the housing so that it rests on the recessed shoulder with the spring clip portions of the terminals lying within the recessed cavities. A potting agent, such as epoxy resin, fills the recessed cavities and extends over the outer face of the substrate to completely seal the substrate to the housing and to encapsulate the terminals.
摘要:
A combined potentiometer and switching structure including wiper contacts fixed to a shaft and having contacting engagement with an annular resistor and a pair of switching rings. The wiper contacts are located coincident, or in phase relation. The switching rings are each provided with an interrupted area, such areas are located in an arc complemental to the arc of the resistor and are circumferentially spaced apart a distance not greater than the length of the resistor contacting surface whereby, during rotation of the shafts, circuits connected to the switch rings are opened at different positions with respect to the resistor wiping contact. Alignment openings in the rings accommodate a pin to permit proper positioning of the rings relative to one another and also provide a passage for a conductor upon removal of the pin once the rings are properly positioned and secured against displacement.