Abstract: A transducer for establishing an output voltage proportional to an input fluid pressure supplied thereto. The transducer has a resistor with a voltage selector movable in electrical contacting engagement therewith to establish the output voltage. A piston actuates the voltage selector to its electrical contacting engagement with the resistor to establish the output voltage in response to the input fluid pressure acting on a diaphragm arranged in driving engagement with the piston.

Abstract: A control device has a housing with an electrical circuit therethrough, and at least a pair of switch means are operable between a pair of switching modes for controlling the electrical circuit. Resistor means are connected in series circuit relation with one of the switch means in one of the switching modes thereof and in parallel circuit relation with the other of the switch means in one of the switching modes thereof. Means is provided for sequentially operating the switching means to the one switching modes thereof, respectively, to energize the resistor means in the series circuit relation with the one switching means prior to the connection of the resistor means in the parallel circuit relation with the other of the switching means.A method of making the control device is also disclosed.

Abstract: An electrical switch adapted to control a plurality of circuits therethrough has a plurality of push buttons reciprocally movable to effect the control of the circuits and including an "off" push button operable generally upon the depression thereof to open all of the circuits. Means is responsive to the depression of the "off" push button for precluding depression of certain of the other of the push buttons, and means actuated by an operator for rendering ineffective the precluding means includes one of the "off" push button and another of the push buttons.