A back-to-back proportioning valve assembly for a cross-split braking system is disclosed. The proportioning valve assembly comprises an assembly housing defining a substantially cylindrical bore extending therethrough. The bore defines first and second rear brake outlet openings. In the assembly housing are disposed a pair of inlet passages extending within the cylindrical bore connected with respective first and second master cylinder chambers. A pair of front brake outlet openings are also di...

A back-to-back diode includes a substrate having five superimposed layers of hydrogenated amorphous silicon thereon. The first and fifth layers are of one conductivity type, the second and fourth layers are intrinsic, and the third layer is of the opposite conductivity type. The layers are all of the substantially the same thickness. A conductive layer contact is provided between the substrate and the first layer and a conductive layer contact is provided on the fifth layer. The intrinsic layers...

A back-to-back locator instrument includes a first portion with an array of two or more magnetic sensors, and an indicator arrangement. A second portion of the instrument includes an array of correspondingly located magnets. Each of the first and second portions includes a marking arrangement, which either allows marking of the underlying surface, or viewing of a mark on the surface for properly locating the instrument portion thereon. When the two portions are congruent or registered, the indic...

A repeater having first and second communication terminals that receives signals at either of the terminals and transmits signals responsive to the received signals at the other of the terminals, comprising: a first signal processor that receives V.90 analogue data signals from the first terminal and generates bit streams responsive thereto that accurately reproduce the data in the analogue signals; a second signal processor; and a communication channel linking the first and second signal proces...

A lampholder assembly in which lampholders are supported on a bracket in a back-to-back configuration with no gap therebetween is formed of a pair of insulative lampholders, each having a generally planar back surface and an opposite front face including a lamp receiving opening. One lampholder includes a set of two resilient latching pawls extending generally orthogonally from and to either side of the back surface thereof and the other lampholder includes a set of two rigid bosses extending fr...

A back pad for a chair having a back defined by a shell, the back pad being fitted over the back shell and providing the back with a resilient padded feel while additionally providing styling flexibility with respect to the appearance of the chair back.

A method for straightening connector pins is disclosed as a preparatory measure for the stringing of wires between the pins. The pins are first anchored in a mounting board which is run subsequently through a pin straightening machine. The pins, when bent, are individually deflected to assume the desired position, and they are twisted around the respective axis defining that desired position, beyond the elastic limit for torsional deformation.

Cushion for supporting the lumbar region of the back of a seat occupant comprises a sealed envelope or bladder containing a resilient open celled foam member. A valve assembly, which is heat sealed to a corner portion of the bladder, permits the seat occupant to readily adjust the resilience of the cushion. A mounting strap attaches the cushion to the seat.

A washing and massaging device is provided which is usually used for washing and massaging the back and other areas of the body. The device comprises a doubled strip of water absorbent material providing a strip which may be reciprocated over the areas of the back and body to be cleansed and massaged. Handles are provided by means of which the strip may be manipulated. The handles are formed of straps of somewhat resilient material. The straps form loops one of which may be engaged by each hand....

A back plane for use as a power bus which supports and electrically energizes microcircuit chips. The back plane is formed by a laminated structure in which are mounted wire wrap pins that form terminals for the microcircuits. The laminates are sheets of conductive material insulated from one another and the wrap pins are mounted in the laminated structure so that electrical contact for each pin is made with only one of the conductive laminates. There are sufficient wrap pins to provide electric...