The present invention relates to novel remotely dismountable valves comprising a valve body welded to the pipes and having a truncated seat, an outwardly truncated member fitting on said seat, an obturator whose movements may be remotely controlled due to an extension element and a heavy element made fast with the member via a cross-piece presenting an upper surface in the form of a segment of a sphere on which surface the likewise spherical surface of the lower face of said heavy element abuts.

The present invention relates to a track vehicle. The vehicle is comprised of a lightweight frame having a platform or deck portion and first and second track guiding portions. Drive drums are provided, located at one end of each of the track guiding portions. First and second electric motors are connected, via gear reducers, each to one of the drive drums. Idler rollers are located at the other end of each of the track guiding portions. First and second tracks are provided, each encircling and ...

A system adapted to remotely control a transformer relay. The load switch of a transformer relay is controlled by controlling the direction of current flow in the secondary winding. A switch module is coupled with two wires to the secondary winding of the transformer relay providing a unidirectional current flow above a predetermined threshold in the secondary winding in response to a control signal. The unidirectional current flow may be selectively controlled in either direction or may be only...

A dredge vehicle having remote steering for moving on the ocean floor on a skid surface, or preferably a pair of runners. The steering is provided by a steering member extending downwardly below the bottom surface of the skid surface into the mud on the ocean floor, which can be moved so as to vary the resultant sideways force exerted against a surface of the member. The movement is provided by pivotally connecting the steering member to the dredge vehicle about a vertical axis. Specifically, th...

A remotely controlled relay having a lever and a link, both of which being driven by a bistable polar electromagnet device. The lever drives a switch circuit to open and close while the link operates the main-circuit opening-and-closing assembly. A current is supplied to the coil of the bistable polar magnet device from an external circuit and magnetizes the plunger such that the plunger moves through a stroke between a first and second positions. When the plunger arrives at the center of its st...

Apparatus for taking liquid samples in a well at any desired level under the surface includes a bullet-nosed tubular body with a weighted lower end and an elongated sampling chamber. The chamber has a circular inlet opening at its upper end which is sealed at its upper surface by a ball-shaped valve member to keep liquid out of the chamber as the body is lowered in the well. The valve member is attached at its upper end to a rod member guided in the body and suspended by a cable. A sharp jerk on...

A drive for a remotely steerable toy boat includes a reversible motor, a propeller shaft and a propeller. A stationary deflector shield is disposed laterally of the propeller. When the propeller is driven in reverse, part of the stream of water delivered from the rear to front, relatively to the boat, is forced against the deflector. Consequently, the boat turns.

In a preferred embodiment, a remotely armed alarm system which is useful in protecting a personal article, which system includes a motion-activated receiver/alarm disposed in the article. The receiver/alarm is armed in response to a first RF signal from a remote transmitter/controller and is disarmed in response to a second RF signal from the transmitter/controller. The receiver/alarm produces an audible sound when the article is moved, the type of sound, i.e., continuous or discontinuous, being...

The vehicle is constructed from a flat disc recessed in a slot in a thin, pencil-like fuselage having aft and front propulsion engines and mounted for rotating about the center of the disc and about an axis extending transversely to the disc and to the direction of extension of the fuselage.

A gate structure is provided whch is openable from a remote position and includes a pair of spaced apart supports on one of which is mounted a hinge arrangement having a pair of spaced apart hinged members which are movable relative to one another and in turn hingedly mount a gate on a support. Power means is provided and is operably connected to the hinge means to effect the relative movement of the hinge members whereby upon relative movement the gate is tilted and the free end thereof is rais...