Abstract: An electromechanical switch including a non-magnetic cup shaped housing, the interior of which is sealed from the atmosphere with a seal assembly. A first electric terminal extends through the seal assembly and is connected to a coil spring. A second terminal includes a stationary electrode. The electrode extends through the seal assembly and through the coil spring. The coil spring supports a movable contact. A permanent magnet is selectively movable via a solenoid in close proximity to the contact member for selectively moving the contact member in and out of contact with electrode. In the closed position, electric current flows between the first and second terminals and through the coil spring. In another embodiment, an electric magnet provides the necessary flux for selectively moving the contact member.

Abstract: An electrical switch functioning as a tilt, proximity or relay switch includes an elongate cylindrical housing with a first open end and a second closed end. A flexible spring extends longitudinally in the housing and is supported away from the housing by a seal at the open end. The housing and spring are electrically conductive and an electrically-conductive spherical ball is located within the housing for selective rolling engagement with the spring and housing. The switch functions as a single pole single throw type switch. A second spring can be located at the closed second end of the housing and supported similar to the first spring. By locating the spherical ball between the two springs, a single pole double throw switch is formed.

Abstract: A mercury tilt switch having a hollow metal housing with opposite open ends. An insulating glass member is disposed at, makes a glass-to-metal compression seal with, and closes, one of the open housing ends. A metal end cap is disposed at, resistance welded to, and sealably closes, the other of the open housing ends. The housing has an outer wall portion defining a single chamber therewithin which extends between the insulating glass member at the one housing end and the metal end cap at the other housing end. At least one electrical electrode is sealably mounted through the insulating glass member and projects from opposite sides thereof to the outside of and into the housing chamber. A quantity of mercury is disposed in the single housing chamber and is flowable between and contactable with the electrode at the one housing end and the metal end cap at the other housing end upon tilting and countertilting of the housing.

Abstract: An impulse mercury relay with magnetic interlock switch is provided comprising a first electrode member containing a body of a liquid conductor therein, a second electrode member received and secured inthe first electrode member, and a displacement plunger movable in the first electrode member to cause contact between the liquid conductor and second electrode member. A magnet device is movable with the displacement plunger, and a magnetically-actuable switch externally disposed of the first electrode member is actuated by the magnet when moved with the displacement plunger. A holding device is also provided to magnetically hold the displacement plunger at the desired position when the coil device is deenergized.

Abstract: The disclosure relates to a mercury displacement relay and a method of making the same which utilizes a spring totally submerged within the mercury to support a movable displacement plunger. A cylindrical electrode contains the mercury, and the spring is uniquely connected to the bottom portion of the electrode. The spring opposite end is attached to a bottom portion of the displacement relay, which is received within the cylindrical electrode so that its bottom portion is submerged in the mercury. A pin electrode is also received within the cylindrical electrode and insulated therefrom. Adapted to the cylindrical electrode is a coil device, which, upon being energized, moves the plunger upwardly to cause the mercury to recede and break contact with the portion of the pin electrode in contact with the mercury. Upon deenergizing the coil device, the spring draws downwardly on the plunger to cause the mercury to rise and make contact again with the pin electrode.

Abstract: One or more mercury displacement switches are positioned against a plate-shaped mounting bracket and interlocked to the plate by means of a strap extending around each switch and through the mounting bracket.