A gas-generating pyrotechnic composition comprises: A. a fuel selected from the group consisting of alkali metal azides and alkaline earth metal azides, B. an alkali metal oxidant selected from the group consisting of alkali metal perchlorates and bichromates, C. a nitrogenous compound selected from the group consisting of aminotetrazole, aminotetrazole hydrate, azodicarbonamide and azotetrazole, and D. optionally, silica as an additive for reacting with the solid combustion residues of the comp...

A scheme for transforming input digital information into output analog information where the output is a specified and not necessarily linear function of the input is disclosed. In its simplest form, the circuitry for achieving this result consists of a ladder network, a waveshaping impedance, and a signal generator connected in series. Each rung of the ladder network is a series impedance and gate circuit associated with a specified digital position in the input code and the corresponding imped...

A particle free device for releasing a metal vapor, such as cesium or mercury, which comprises a vapor permeable particle free envelope and a metal vapor releasing substance within the envelope. This substance can be a mixture of a metal compound and reducing agent for the compound, or can be a material such as a metal oxide which releases its metal upon heating. The devices can have a resistance heating unit in thermal proximity to the metal vapor releasing substance. These devices are useful f...

An alkali metal generator comprising: an evacuated container; at least one heat-responsive source of an alkali metal vapor in the container; a closed conduit for connecting the evacuated container to a vessel to be charged with the alkali metal vapor; and means for opening said closed conduit. The container can also have a getter device.

Improved constructions for electrogasdynamic power generators wherein localized disruptive disturbance of the streamlined flow path of vapor containing gas therethrough is effected by selectively located sharp edged surface discontinuities in the flow defining channels thereof.

An optical image generation system, for use in aircraft and other simulators, including two or more perspectiveless input objects each contributing a different component to a composite output image having perspective. The perspectiveless input objects, each to a different scale, are passed through a perspective generation system which is constructed in accordance with Scheimpflug principles. At least one of the component output images from the perspective generation system resulting from the inp...

The number of sequential line buffers in a digital TV system including a symbol generator which consists of a group of segment generators is reduced by connecting in series a group of sequential line buffers. Each sequential line buffer is a shift register which contains the number of character positions representing one horizontal row of characters. For a 10-line-high character with six lines of vertical spacing between rows of characters, five segment generators and five sequential line buffer...

Apparatus for generating lenses is intended to overcome the problem of the lens breaking as the cutter tool is traversed across the lens. Drive means for moving the lens towards and away from the cutter tool during a cutting operation, is controlled so that, during the initial traverse of the cutter tool, the lens is backed off from the cutter. Before the return traverse the lens is moved back towards the cutter tool so that the tool removes the remaining thickness from the lens. The drive means...

An information signal generating apparatus including a planar magnetic field shielding element which is provided with apertures representing coded information and through which a magnetic flux from a magnetic field source disposed on one side of the planar element is adapted to pass. A signal generator which may be in the form of a pair of facing pole pieces disposed on opposite sides of the planar element is adapted to move across the planar element and is provided with an inductively coupled w...

There is disclosed a method and apparatus for transforming an input signal Y.sub.in =f(x) into an output signal Y.sub.out =g(x) involving approximation of the input by a function having a plurality of terms which are functions of the independent variable, generating electrical signals representing each of the terms of the approximating function except for a designated remainder term, and subtracting the signals representing the generated terms from the input signal thereby yielding the designate...