A multiple plate valve is provided which includes a body portion having an opening therein, at least a pair of closure members, such as plates, operatively disposed within said body portion and adapted to be moved between open and closed positions and to cooperate with each other to close off the opening in the body portion, and means for repositioning the closure members with respect to each other and the opening, as the closure members wear out, so that the closure members will continue to coo...

Drops of different solutions suspended from the perforations of an upper plate are moved down into contact with a suitable reactive layer or substrate disposed on a lower plate, or the drops may bulge above a welled lower plate which is contacted with an upper reactive layer. The reactions between each of the solutions and reactive layer simultaneously commence when the suspended or upwardly bulging drops contact the reactive layer. A sheet of unexposed but developed photographic film incorporat...

Slotted staves for sonar transducer array elements in which the forward vical frame is slotted and individual plates for each transducer element are bolted to it. This permits the individual transducer elements to tilt vertically in the slots on removal and eliminates the rotating of the entire transducer assembly as done previously.

A multiple container carrier made from a resilient deformable plastic sheet material and having a plurality of container encircling bands and integral webs which by virtue of their shape, size, and cooperation with certain cylindrical containers will cause the resulting package to be a tight, compact package.

A seal carrier, which receives a rotatable shaft therethrough, has two spaced apart seals mounted therein. A first annular grease chamber around the shaft is defined between the two seals, and a second annular grease chamber around the shaft is defined between one of the seals and a circular flange of the carrier which is spaced from said one seal. The carrier has a grease inlet fitting in communication with both grease chambers, and has a discharge opening diametrically opposite the inlet fitti...

Disclosed herein is an assembly of two-ply sheet material joined by an adhesive medium in a certain pattern and perforated according to this pattern to provide a plurality of mailable documents or packets of envelopes, each of which has spaced addressed areas offset with respect to any adhesive medium. These packets, in separated condition, are foldable from a sheet-like condition to a folded condition wherein window panels in one section of the packet expose for viewing a pair of desired addres...

An input signal from a microwave source is divided equally between a parallel arrangement of multiple transistors by an input circuit having multiple transmission line center conductors with opposite ends capacitively coupled to a reference potential. The multiple transmission line center conductors of the input circuit are arranged to provide an impedance match between the signal source impedance and the transistor complex input impedance. An output signal from the parallel arrangement of multi...

The specific disclosure provides a multiple channel electrocardiograph wherein three body voltage measurements are simultaneously read-out on a moving chart. The electrocardiograph comprises means for automatically changing the body voltage measurements that are recorded on the chart, and means including a selectively operable circuit for automatically attentuating chest voltage measurements taken in vicinity of the heart.

A multiple component pre-former permits the cutting and pre-forming of the component axial leads in multiples during a single machine cycle. The ends of the components are secured by tape. A feed system engages the taped ends of the component to advance groups of taped components into position on a die set where the multiple components within the group are cut and formed. Safety switching means are provided which prevent operation of the pre-former during periods of loading or unloading of the p...

A multiple tape dispenser comprising, a cylindrical housing having a plurality of reels of tape rotatably mounted in the housing and spaced apart in fixed relationship to each other, said housing having an edge over which the housed tape may be dispensed, and a cutting means affixed to the housing and located near the edge of the body member for cutting a length of desired tape at the point the tape is dispensed.