TL;DR: An electrical switch sensitive to an externally applied inertial and gravitational force, having an enclosure with a closed space, at least two electrodes in communication with the space, an electrical circuit coupled the contacts and having electrical connections for connection with a power source and a load as discussed by the authors.
Abstract: An electrical switch sensitive to an externally applied inertial and gravitational force, having an enclosure with a closed space; a conductive fluid filing a first portion of the space and a non-conductive medium filling a second portion of the space, the conductive fluid and the non-conductive medium having differing densities; at least two electrodes in communication with the space; an electrical circuit coupled the contacts and having electrical connections for connection with a power source and a load, having a semiconductor switching device, which is responsive to a current through the contacts, a current through the contacts causing the semiconductor switching device to change in conductivity. An externally applied force, e.g., gravity or inertial force, causes the conductive fluid to move within the enclosure with respect to the contacts, altering a current through the contacts, and thereby changing a conducting state of the semiconductor switching device. The switch resides within a housing, containing both the enclosure and the electrical circuit.
TL;DR: In this article, a closed tubular glass envelope and at least one pair of electrodes extending through one end of the envelope and presenting terminals located within the region enclosed by the envelope, and adjacent the one end thereof, is formed to have two indentations located opposite one another, spaced from the ends of the envelopes, and spaced at a greater distance than the terminals from one end.
Abstract: In a mercury switch composed of a closed tubular glass envelope and at least one pair of electrodes extending through one end of the envelope and presenting terminals located within the region enclosed by the envelope and adjacent the one end thereof, the envelope is formed to have two indentations located opposite one another, spaced from the ends of the envelope, and spaced at a greater distance than the terminals from the one end, the indentations projecting toward one another to define, within the region enclosed by the envelope, a gap for the passage of mercury between the ends of such region.
TL;DR: A mercury switch device is a switch device comprising a pool of mercury and a plurality of electrical contacts made of or coated with a nonwettable material such as titanium diboride as mentioned in this paper.
Abstract: A mercury switch device comprising a pool of mercury and a plurality of electrical contacts made of or coated with a non-wettable material such as titanium diboride.
TL;DR: An oscillating water-gun target enclosing a mercury switch completes a circuit to a drive motor for moving an animated indicator along a vertical track with the circuit being interrupted upon failure of the water stream to strike the switch means and including a cutoff switch actuated by the indicator when it reaches the top of the track as mentioned in this paper.
Abstract: An oscillating water-gun target enclosing a mercury switch which, when struck by a stream of water from a water gun, completes a circuit to a drive motor for moving an animated indicator along a vertical track with the circuit being interrupted upon failure of the water stream to strike the switch means and including a cutoff switch actuated by the indicator when it reaches the top of the track.
TL;DR: In this paper, a magnetically controlled switch with contacts wetted by a conductive liquid is described, where the wettable contact surfaces of the electrodes are selectively connected to one another by a wettably ferromagnetic moving element covered with mercury which is held solely by the surface tension forces of the mercury.
Abstract: The invention relates to a magnetically controlled switch with contacts wetted by a conductive liquid. It is characterized in that the wettable contact surfaces of the electrodes are selectively connected to one another by a wettable ferromagnetic moving element covered with mercury which is held solely by the surface tension forces of the mercury. The absence of any polarizing force and the lightness of the moving element enable the switch to operate with a minimal energy consumption and stabilize it against accelerations. Principal application to any low-power circuit and in particular to telephone circuits.