An improved isolated oil pan assembly is provided for use on an internal combustion engine, such as a diesel engine, thereby eliminating a serious problem associated with prior engines of this type; namely, a source of undesirable noise. The improved pan assembly includes a pan which is secured to the underside of the engine block by a plurality of fastening means spaced from one another and disposed inwardly from the periphery of the pan. Each fastening means is positioned within an elongated s...

Circuitry for providing electrical isolation between an input signal source and other circuitry which utilizes such input signal. The isolation circuitry uses an optical coupling means comprising a light-emitting diode circuit and a photo-responsive element, the input signal being supplied by a bridge circuit which provides a unidirectional voltage from the input signal which is then applied to a normalizing, or limiting, circuit which converts the unidirectional voltage to a substantially const...

An electrical connector in sheet form or the like which has a low through resistance in a volume between opposing surface contacts on opposite sides or surfaces of the sheet and provides a substantially higher isolation resistance in all volumes thereof between a contact on the surface of the sheet which is at a distance greater than the thickness of the sheet from any of the first of the above mentioned contacts.

A double isolated electrically shielded screen room in which all side, top and bottom panels are identical, and along with preassembled corner units, have identical cross-sectional edges that edge-abut identically for on-the-site assembly. All joints and shielding connectors between contiguous shielding members are cross-sectionally alike and are clamped together in common planes that are parallel to the respective faces of the panels and units to form smooth walls that completely enclose the ro...

A resiliently mounted platform mounted on a tractor having cross beams carried on the chassis for resiliently supporting the platform.

A vehicle having means defining an operator station including a control module supported on a shroud and resiliently mounted on the vehicle chassis and means defining an engine compartment including a fire wall in spaced relation to the shroud to provide a sound and vibration dampener between the engine compartment and the operator station.

An electrical outlet and safety control circuit for preventing accidental shock comprising a socket with a pair of outlet terminals isolated from a primary voltage source by normally opened relay contacts, and a switch actuatable by an elongated pin on the associated electrical plug upon insertion thereof into the socket, the switch being serially connected to the relay for closure thereof and simultaneous energization of the electrical terminals upon complete insertion of the plug.

A double isolated electrically shielded screen room in which all panels are identical and interchangeable for assembly with all overlapping shielding contacts between contiguous shielding members disposed in planes parallel to the respective panels and secured under compression in a direction perpendicular to each panel with great isolation efficiency by outwardly concealed clamping means applied from inside the room assembly so that the floor and space around the room is also economically conse...

A rotary compressor includes a cylinder with a cylindrical compression chamber. A cylindrical piston is eccentrically movable within the chamber. A vane slot extends outwardly in the cylinder from and communicates with the chamber. A vane is reciprocatingly mounted in the vane slot for selective protrusion into and retroaction from the chamber to contact the piston. At least one noise reduction slot projects into the cylinder from its outer peripheral wall near the vane slot and extends complete...

A system is isolated from disturbances having low amplitude, the isolation consisting of a number of oblique resilient elements and a number of damping elements functionally coupled in parallel with the oblique resilient elements. Both the oblique resilient and the damping elements are connected with an isolating part in an outer frame. The damping elements have no supporting function and act nonlinearly. This system is useful for sensitive instruments and tools, as ultramicrotomes.