Abstract: This invention provides for the edgewise storage of a filmstrip in the cavity between two concentric drums. The filmstrip is wound into the cavity between the two drums by a feed roller and pressure rollers as the drums rotate synchronously. The feed roller, in conjunction with the pressure rollers, serve to advance the filmstrip through the cavity, thereby providing storage for a considerable length of film. Since the film is pushed through the cavity to the opposite end, and made available there for use, the invention is especially appropriate for applications requiring endless loop filmstrips. The cavity formed by the drums may be of constant diameter (if the drums are cylindrical), arcuate, tapered, etc., depending upon the shapes of the corresponding surfaces of the concentric drums.

Abstract: Disclosed is a synthetic single crystal for an alexandrite gem, which consists essentially of a synthetic chrysoberyl single crystal comprising aluminum oxide and beryllium oxide as the main components and chromium and vanadium as the coloring components, wherein vanadium is contained in an amount of about 0.00075 to about 2.95% by weight based on the crystal.This single crystal shows a green or bluish green color under natural light and the color is changed to red or reddish violet when the single crystal is exposed to tungsten light the single crystal of the present invention is comparable or superior to natural alexandrite produced in the Ural Mountain Region with respect to the hue and color change characteristics.

Abstract: This invention discloses a crack-free and low-cost detection element for determining an oxygen content and a detector for determining an oxygen content using the element. The element comprises a ceramic tubular body, an ion-conductive ceramic bowllike closing member fixed to the opening end of the tubular body in such manner that the opening end of the closing member may not be inserted into the opening of the tubular body, and an inner and an outer electrode respectively mounted on the inside and the outside surface of the bowllike closing member.

Abstract: A timing and control circuit for a wide spanning impact hammer used in a digital printer can be fabricated by using a phase lock loop oscillator driven by a character pulse clock to output a plurality of timing pulses during the character pulse width. Appropriate intervals are selected from the timing pulses to generate a plurality of shifted timing pulses to be used as inputs to logic circuitry. Combination of the shifted timing pulses and logic circuitry together with control commands from a printer controller, can be used to generate a hammer trigger and hammer reset pulse. The hammer trigger and reset pulses are used in a conventional hammer matrix to fire the multiple spanning hammers at the appropriate times.

Abstract: A leadless package receptacle for mounting and interconnecting to electronic devices (e.g. leadless package) which can be interconnected with a second receptacle for packaging such devices, said receptacles having improved spring contact members. The receptacle incorporates a plurality of uniquely designed spring contacts for connection to a printed circuit board or other circuit member in a conventional manner. The spring contacts are arranged and configured within the receptacle to yieldably engage the lower surface of the leadless package so as to maintain a line contact. In addition, each spring member has a separate arm member to engage the spring contact members of the second package. The leadless package includes a chip carrier which has a plurality of conductive areas on the lower surface thereof for engaging the spring contacts. Edge regions are cooperatively disposed on the carrier with respect to locking members on the receptacle for retaining the package in the receptacle.

Abstract: The Laplace transform (s-plane) is obtained for contiguous or overlapping frames of speech (or other signals) and polepair parameters (frequency, damping, magnitude and phase) are selected for transmission so as to preserve maximum energy. Speech is reconstructed from the transmitted parameters, using, for example, a damped sine wave as the equivalent of a pole pair. No separate pitch determination is made, nor is a voiced/unvoiced decision required.