Abstract: An accessory for use with an eye examination apparatus including an eyepiece, a control lever for controlling the position of the eyepiece, and a tonometer unit located rearwardly of the eyepiece and including a contact element which is adjustable for varying the pressure applied by the contact element against the subject's eye. The accessory includes a remote control unit attachable to the apparatus such that a control member in the remote control unit is in the vicinity of the control lever of the apparatus for controlling the position of its eyepiece, and a coupling between the control member and the tonometer unit such as to permit the operation of the control lever and the control member by one hand of the examiner while the examiner views the subject's eye via the eyepiece.

Abstract: A contact lens for intraocular observation capable of optically recognizing an inner portion of an eyeball by contacting the contact lens on a surface of a cornea of an eye to be inspected through a light ray transmitted through an inner portion of the contact lens comprising: an optical path dividing member provided on an optical path for leading a light ray incident on the inner portion of the contact lens to the eye to be inspected for dividing a portion of the light ray on said optical path; and an index provided at a position approximately optically conjugate with a portion to be observed of the eye to be inspected on a divided optical path divided by the optical path dividing member. The portion to be observed and said index can optically be recognized by at least partially superposing a first image of the index on a second image of the portion to be observed.

Abstract: Disclosed is an eyewear system designed to improve the comfort, fit, functionability, and modularity of the eyewear. Features include a 180.degree. reflex spring hinge which improves comfort, fit, and safety; a sway-hinge mechanism that allows the temples to be independently adjusted to improve comfort and fit of the eyewear behind the ears; a strap-pad which has been ergonomically designed to fit different shaped and sized noses and can be positioned for wearer comfort and convenience; a frame and lens construction that allows for modularity by the easy removal and replacement of the lens, temples, tops of frames, and nose pieces; and accessories that can be added to the eyewear to provide a greater degree of comfort and to protect the face from ultraviolet radiation and the wind.

Abstract: The hot core engine compartment of a turbojet engine is cooled by the metered flow of cooling air exhausted through a laminar flow nacelle system. This arrangement reduces the need for extracting bypass ram air from the engine performance cycle for cooling purposes and thereby improves specific fuel consumption and engine efficiency. A turbocompressor pump driven by bleed air from the core engine compressor draws cooling air through the laminar flow nacelle system and pumps the air into a manifold surrounding the core engine.

Abstract: A cathode in an MPD thruster has an internal heater and utilizes low work function material. The cathode is preheated to operating temperature, and then the thruster is fired by discharging a capacitor bank in a pulse forming network.

Abstract: An image at a distant point and an image at a close point for generating depth perception of a subject are displayed on an image display monitor, and eye movement of the subject at that time is detected by an eye movement detecting portion. A calculating portion removes saccade component by using velocity or acceleration of the detected eye movement and calculates amplitude of vergence eye movement, change in convergence angle and cross-correlation of velocity or acceleration of the left and right eye movement to determine depth perception of the subject.

Abstract: A pulse detonation engine is provided with several detonation combustors selectively coupled to an air inlet and fuel source by a rotary valve. The rotary valve isolates the steady operation of the air inlet and fuel system from the unsteady nature of the detonation process, and allows the fueling of some of the detonation chambers while detonation occurs in other detonation chambers. The fuel system may use a solid fueled gas generator.

Abstract: Apparatus for securing a pair of eyeglasses to the headband of a headset worn by a person, comprising an attachment removably connected to the headband, a flexible boom connected to the attachment, and a clamp disposed at an end of the flexible boom remote from the attachment for removably connecting the pair of eyeglasses such that the pair of eyeglasses are adjustably positionable relative to the eyes of the person.

Abstract: A jet engine having at least one combustion chamber with a propelling nozzle connected behind it, achieves in a constructionally simple manner and with a high propulsion effect a cross-sectional configuration of a hot gas flow duct bounded by the propelling nozzle that is highly variable with respect to the nozzle throat area as well as to the outlet area. The propelling nozzle contains a divergent lengthening part which is axially movable for the outlet-side expansion of the hot-gas flow duct. In the moved-out position, the lengthening part connects essentially in the corresponding shape to the divergent outlet end of the nozzle outer wall fixed to the engine and, in the moved-in condition, forms together with it an air outlet duct which encloses the fixed nozzle wall end in a ring-shaped manner and whose cross-section can be regulated.

Abstract: A three-dimensional shape measurement system produces three-dimensional information of an object, such as an eye fundus, by directing light onto the object, receiving the light reflected from the object, photoelectrically converting the received light and processing the electric signal. The system includes laser beam control circuitry for focal point shifting in the direction of the optical axis, and a pair of detectors for detecting variation in the focal position of the light reflected from the object and deriving information respecting the shape of the object in the direction of the optical axis. Signal processing circuitry drives the laser beam control circuitry to produce a focused condition and adjusts the output signals of the detectors to a prescribed state.

Abstract: A process for the production of power from a carbonaceous fuel comprising partially oxidizing the fuel with oxygen or an oxygen containing gas to yield a combustible gas stream and sensible heat, said sensible heat or a major part thereof being transferred to the power producing unit together with the combustible gas. The power producing unit is a humid air turbine cycle.

Abstract: A device for releasably locking, in a tubular first member (1), a second member (2) which is displaceable in the first member, has a slide (6) mounted on the first member. A driver pin (7) on the second member <2) extends through a slot (4) in the first member and through a hole in the slide to entrain the slide in the displacement of the second member. A spring (9) urges an operazing lever (8) rotatably mounted on the driver pin (7), towards the slide (6). The slide has cam means (10) cooperating in such a manner with the operating lever (8) that this lever, when being rotated from a free position to a locking position, is urged out from the slide against the action of the spring (9), such that the spring urges the driver pin (7) outwardly so as to resiliently urge the second member (2) against the first member (1) which is thus clamped between the slide (6) and the second member (2), whereby to lock the latter in its position of displacement.

Abstract: An apparatus for optical treatment using a light beam, which includes an apparatus body having a first control operation device for providing an optical treatment light and an optical fiber cable for introducing an optical treatment light from the apparatus body into a delivery unit. The apparatus comprises a light relaying device connected with both of the apparatus body and the delivery unit through the optical fiber cable, second control operation device provided in the light relaying device, optical communication device for transmitting and receiving light signals, the optical communication device being arranged in the apparatus body and the light relaying device respectively, an optical system for introducing the light signals which the optical communication device transmits and receives through the optical fiber cable.

Abstract: A pulse detonation engine is provided with several detonation combustors selectively coupled to an air inlet and fuel source by a rotary valve. The rotary valve isolates the steady operation of the air inlet and fuel system from the unsteady nature of the detonation process, and allows the fueling of some of the detonation chambers while detonation occurs in other detonation chambers. The fuel system may use a solid fueled gas generator.

Abstract: Difficulties in starting a turbine engine, particularly ones having a small volume combustor (83) with a low dome height, may be avoided by a method including the steps of a) forming the turbine engine compressor (48) of a low density, high temperature resistant ceramic material, b) directing pyrotechnic gases at a temperature of at least about 3,000.degree. F. against the blades (48) of the compressor, c) continuing the step of directing until the turbine rotor (44) is rotating at at least about 60 percent of rated speed and d) combusting fuel in the combustor (83) of the turbine engine to maintain the rotor (44) rotating at at least about 60 percent of rated speed.

Abstract: A fuel/oxidizer pre-mixing combustion chamber for a turbojet engine is disclosed in which the pre-mixing device is incorporated into the upstream end wall structure of the combustion chamber. The upstream end portion of the combustion chamber, which is in communication with the oxidizer, has a plurality of generally radially extending, "V"-shaped members oriented such that the vertex of the "V" shape faces in an upstream direction. These members extend generally radially between the inner and outer walls which define the boundaries of the combustion chamber. The members define upstream edges and downstream edges which are axially the upstream edges. Fuel injectors extend radially inwardly between these members and are axially positioned between the locations of the upstream and downstream edges so as to spray fuel onto the adjacent sides of each of the members.

Abstract: Safety glasses for use with an endoscope and similar devices, the glasses being made of a frame, a first lens portion fixed to the frame, a second, moveable lens portion, and a member for connecting the second lens portion to the first lens portion so that the second lens portion is displaceable when an external force is applied against an outer surface of the second lens portion.

Abstract: Solid fuel gas generator compositions for use in ducted rockets, in which fullerenes or substituted fullerenes are used. Fullerene compounds in which easily oxidizable groups, oxidizing groups, or salts of oxidizing acids are attached to the spherical carbon skeleton of the fullerene.

Abstract: An active cooling mechanism for a turbine disk is disclosed. Various construction details are developed which disclose a turbine section having a rotor assembly, a disk with an attachment means, a radially movable heat shield disposed therebetween, and a cooling passage which directs cooling air over the forward surface and radially outer surface of the attachment means. During operation, rotational forces urge the heat shield radially outward to create a gap between the heat shield and the attachment means, the gap defining a portion of the cooling passage.

Abstract: A tube assembly, such as a flame tube for a gas turbine plant, includes a tube segment having an inner region for guiding a hot gas in one flow direction. A heat shield faces toward the inner region and includes a plurality of bricks being disposed side by side. At least one metal support frame supports the heat shield. The support frame has a plurality of conduits for supplying a cooling gas and a lip encompassing the tube segment and substantially covering the conduits toward the inner region leaving a slit for conducting the cooling gas from the conduits past the lip to the inner region.