Abstract: A Teflon stopper for glassware includes a venting valve formed in the stopper with a valve stem threadably mounted within a bore in the stopper for selectively controlling communication between a vent passage within the stopper and a vent passage within the valve stem. An extractor assembly including a threaded portion on the outer end of the stopper and an extractor nut threadably mounted thereon is provided for easy extraction of the stopper from a flask opening.

Abstract: An adaptor for ground glass joints or couplings for laboratory glassware includes a Teflon body member having male and female coupling portions and a retracting nut threadably mounted on one end of the coupling member for engaging the end of a female joint member for retraction of the male member therefrom. An alternate embodiment comprises a Teflon stopper having a retracting nut.

Abstract: A rotary evaporator shaft having tapered coupling surfaces for coupling to a rotary drive and to a container includes an extracting device disposed between the tapered coupling joints and moveable into engagement with a selected one of the container or the drive means for extracting the coupling therefrom with the shaft constructed of a synthetic resin polymer such as that sold under the trademark TEFLON.

Abstract: At least two spaced piers are constructed on a suitable tidal beach extending from the shore into the water a predetermined distance to meet the first breaking waves at low tide. A carriage is movably supported on the piers on an inclined path, the carriage having a frame supporting a pair of spaced sprocket wheels on each end over which is passed an endless belt. The ends of a plurality of blades are secured to the chain in spaced relation completely thereabout. Each sprocket wheels closest to shore is connected to a gear train for transmitting the torque generated by the wave action to a power belt extending along each pier to a transducer located at the shore end of the pier. Means are provided for moving the carriage on the pier on an inclined path in and out from the shore to meet the level of the changing tide so as to continuously generate power throughout the tidal wave.

Abstract: Optical performance characteristics of fiber optical cable components and assemblies are tested for quality in an accurate, consistent, and stable manner by the method and apparatus of this invention. The novel apparatus enables acceptability testing of a supplier's fiber optic component/assembly by comparing its optical transmission level with the level of a similar known acceptance cable or a calibration cable, the latter two cables being incorporated in the invention apparatus. Other optical parameters can be tested by this invention to determine additional line losses, such as insertion losses, optical continuity, signal modulation, etc. Stability in the test method is assured by utilizing a variable, calibrated power source.

Abstract: A closure cap is provided for a fluid container which when removed from the container and inverted will enable the measuring and dispensing of a selected amount of the fluid from the container, the closure cap capable of then being re-installed on the fluid container for stowage.

Abstract: 1. A method for detecting and differentiating between containers of submed junk and explosive-filled mines in demolition operations, comprising the steps of subjecting an unknown submerged container under surveillance to a gamma radiation source, traversing said submerged container with said source along a standard diagnostic path, detecting the changes in intensity of the radiation penetrating the submerged container, and recording the variations of intensity of said radiation penetrating the submerged container along said path to obtain a density signature of said submerged container and contents enabling a positive identification of said unknown submerged container by comparison of its density signature with density signatures of known containers.

Abstract: Maximum lifting force is achieved in a dome-shaped parachute by fabricating he canopy of upper and lower spaced canopy membranes. A plurality of circumferentially spaced, radially disposed, flexible rib sections are connected between the canopy membranes to form a plurality of ram air cells, each cell having a ram air inlet port at the canopy hem, and a ram air outlet port at a central vent at the canopy apex. The rib sections can be provided with porous sections to equalize the ram air pressure between adjacent cells. The bottom canopy wall in each ram air cell may also be provided with a porous section for admitting the positive air beneath the canopy into each cell. A pull down vent line can be connected to the canopy apex for changing the camber or angle of attack, and therefor the parachute drag.

Abstract: In an optical data bus system, a fail-safe optical repeater-amplifier assly is provided by light energy amplifying means connected in the data bus for developing gain of signal strength for light signals transmitted along the data bus in a known direction. The light energy amplifying means is connected in parallel with a passive, non-amplifying light path, the light path having an optical length for impressing a delay on light signals passing therethrough which is substantially equal to the optical delay imposed by transmission through the light energy amplifying means.

Abstract: A wideband whip antenna is fabricated by a method which enables the antenna o have a thinner profile, be lighter in weight, and much more flexible in that the radiating conductors are mounted in a plastic antenna core in a manner to be movable freely longitudinally therein when doubled without damage to their electrical continuity.

Abstract: A pulsed laser produces emitted laser energy by photodissociation of metal dihalide and cyclic recombination. A metal dihalide selected from sub-group II-B of the periodic table of elements is contained within an elongated sealed enclosure. Ultraviolet photons supplied from another laser employed as an excitation pump causes dissociation of the metal dihalide for achieving the ultimate laser action. An inert buffer gas is included within the enclosure for aiding photon energy transfer uniformity and to provide vibrational relaxation of the lasing medium in its electronic states. Two reflective surfaces, one of which is only partially reflective, are aligned with the principal axis of the laser assembly for producing an optical resonator for the emitted laser energy.

Abstract: A coded signal is added in the transmitting channel of a communications sem to provide, at the receiver site, an adaptive processor with a reference signal for adaption. At the receiver site, the reference signal is removed to provide an error signal which is fed to the adaptive array processor. The error signal is also fed directly to the communications receiver without further processing.

Abstract: Means for enabling a high range resolution radar to maintain precise range nformation of a high velocity maneuvering aircraft or other target during radar operation. A voltage indicative of target motion is provided as an input to a voltage controlled oscillator that develops a waveform having a frequency that varies from the frequency of a stable reference oscillator by an amount commensurate with that voltage input. The frequency differential of the two oscillators is utilized to cause the tracking window to move in proportion to the range rate of the target.

Abstract: A wheelchair is designed to enable an invalid to stand, sit or choose at l any intermediate position to perform useful work, and to move about in any of said positions. The wheelchair helps to fulfill the psychological and physiological needs of handicapped persons. The lifting and lowering operations are so arranged that practically no dislocation of the invalid's clothes occurs during the operations. The wheelchair has a minimum of physical encumbrances permitting the invalid to function near normally in the average living or working spaces.

Abstract: A towing vehicle is provided with a hitch mechanism operable by the vehicle perator without leaving his driving station on the vehicle and which will positively clamp a cart which is to be towed by means of a set of movable jaws.