Abstract: A fixed drum has input, output and developing segments of aluminum to provide a cool input and output segments thermally separated from a heated developing segment maintained at substantially constant temperature. The film to be developed passes beneath a wire at high electrical potential relative to the drum to receive charge from a corona discharge that produces electrostatic forces securing the film to an endless belt that carries the film around the drum wrinkle-free. A pair of input rubber drive rollers drive the belt around the drum. The film to be processed is placed on the belt between the drive roller and drum. An output pair of metal rollers partially drain the charge from the developed film and belt and guide the film toward the exit slot. The inner surface of the belt is electrically conducting low friction tetrafluoroethylene to allow the belt to move freely around the stationary drum. The belt outer surface is silicon rubber which may be impregnated with carbon.

Abstract: A communications line under test intercouples programmable local units, one of which transmits an analog waveform to the other in response to digital control signals received from a computer. The receiving programmable local unit transmits a digital signal to the computer representative of the received analog signal to thereby enable the computer to determine transmission characteristics of the communications line intercoupling the programmable local units.

Abstract: A locked enclosure may be eventually automatically unlocked by a simple pin element in a hasp-lock which drops out of the hasp-lock in case of temperatures associated with a fire.

Abstract: A light source, such as a light emitting diode (LED), illuminates a cadmium sulfide or cadmium selenide photocell to lower its resistance and thereby initiate conduction in a solid-state device, such as a silicon controlled rectifier (SCR), to deliver current to a load that is interrupted by removing the light energy and restoring the photocell to its unilluminated high resistance state. A feature of the invention resides in limiting the optical energy incident upon the photocell so that its resistance remains well above the lowest resistance it can attain while still dropping to a resistance value considerably below its maximum resistance when unilluminated so that within the total resistance changes of the photocell, the small percentage resistance charge required for proper activation of the solid-state device, may be effected relatively rapidly both for turn on and turn off.

Abstract: A game racket with adjustable string tension includes a yoke in the throat portion of the racket to which main strings may be secured that engages opposed inside portions of the frame in the throat at upper and lower opposed pairs of points. A tension member secured between the yoke and handle portion of the racket is adjustable in length as an adjusting screw is rotated to control the position of the yoke in the throat and the main and cross string tension.

Abstract: One or more lasers direct one or more beams of radiant energy upon a nonlinear crystal having a sequence of rotational twin planes parallel to each other and perpendicular to the incident beams to produce an output beam at predetermined frequency at relatively high power level that may be detected or used in a suitable utilization device. Preferably the twin planes in the crystal are separated from each other by uniform spacing related to the coherence length for the nonlinear process being employed so that the power enhancement is proportional to the number of twin planes squared.

Abstract: The present invention relates to a navigating bridge for seagoing vessels with a panorama-deckhouse and a central action station with a concentration of all means necessary for observation and operation within the range of the operator in charge. There are port and starboard workplaces with port and starboard chairs, respectively, and a U-like navigating desk embracing the port and starboard workplaces having a front console and adjoining starboard and port side consoles. The port and starboard chairs are mounted for movement on port and starboard rails, respectively, in the first and second workplaces, respectively. There is a middle console located between the first and second rails adjoining the middle part of the front console. The height of the chairs relative to that of the consoles is high enough so that a person seated in either of the chairs has a clear view over all the consoles. The vehicle steering gear may be controlled at the aft portion of the middle console from a third workplace.

Abstract: An alignment system for aligning one or more soft X-ray lithographic masks with respect to a substrate to be exposed in a soft X-ray lithographic apparatus includes alignment marks on the masks and corresponding alignment marks on a substrate, and a means for detecting X-rays emitted from the alignment marks on the substrate.

Abstract: A stereoscopic camera having wide angle lenses separated by the normal interpupillary distance photographs a scene on separate 38 mm-square frames of 120-size film strip to provide a left slide and a right slide. The stereoscopic viewer for viewing these slides has separate left eye and right eye assemblies with wide angle lenses having the same focal length as the lenses in the camera and separate supports for the slides. Each of the lenses is individually focusable and provides a borderless, circular field of view. The respective assemblies are relatively displaceable to enable the observer to set the interpupillary distance that best suits him. The slides are illuminated with light reflected from a generally cylindrical opaque screen and originating from a light bulb substantially at the axis of the cylindrical screen.

Abstract: A resilient shaft sealing lip is biassed to bear against a shaft when the shaft is at rest to prevent egress of lubricating liquid past the sealing lip, but upon rotation of the shaft at its rated speed the lip lifts so that sealing friction forces are limited to those generated by liquid friction and a return conveyor mechanism provided in combination with the lip, is effective upon shaft rotation to return escaping liquid and thereby take the place of a tight sealing lip for this purpose. The arrangement thereby provides reduced wear, reduced heat generation and reliable prevention of leakage with long service life consistent with economical and modular construction.

Abstract: Liquids containing microorganisms, macromolecules or finely-divided solid matter in a liquid are filtration-concentrated by movement of the liquid containing such particles through an elongated tubular channel having membrane filters, as walls thereof, with flat surfaces and pore diameters between 10.sup..sup.-2 mm and 10.sup..sup.-4 mm, preferably 2.times.10.sup..sup.-4 to 3.times.10.sup..sup.-4 mm. Laminar flow is maintained at the filter surface and forced transverse movement of contained particles into the filter is provided through a moderate static pressure head. The particle movement is in some embodiments supplemented by heavier particles used to transfer momentum to particles to be filtered thereby. Clogging of the filters is thereby reduced with resultant longer service life and longer intervals between filter maintenance or replacement.

Abstract: A new, performer played, real time, multitonal, multimbral musical instrument consists of speed and force sensitive keys in which time domain multiplexing is used to find and associate one and only one tone generator, not otherwise busy, with any key that is depressed. The sound generator disclosed can provide very realistic simulations of the flute, oboe, trumpet, French horn, trombone through the provision of various types of modulations in amplitude and frequency of the various partials, as is characteristic of each instrument simulated, and filtered noise. Glissandi are provided from one note to another and are controlled from the pair of keys involved by the relative pressure with which they are depressed. For the nonpercussive tonalities, the speed with which a key is depressed, which is determined by differentiating the force, may be used to cause the attack transient to behave in a manner very characteristic of the instrument being simulated.

Abstract: A new, performer played, real time, multitional, multimbral musical instrument consists of speed and force sensitive keys in which time domain multiplexing is used to find and associate one and only one tone generator, not otherwise busy, with any key that is depressed. The sound generator disclosed can provide very realistic simulations of the flute, oboe, trumpet, French horn, trombone through the provision of various types of modulations in amplitude and frequency of the various partials, as is characteristic of each instrument simulated, and filtered noise. Glissandi are provided from one note to another and are controlled from the pair of keys involved by the relative pressure with which they are depressed. For the nonpercussive tonalities, the speed with which a key is depressed, which is determined by differentiating the force, may be used to cause the attack transient to behave in a manner very characteristic of the instrument being simulated.

Abstract: A new, performer played, real time, multitonal, multimbral musical instrument consists of speed and force sensitive keys in which time domain multiplexing is used to find and associate one and only one tone generator, not otherwise busy, with any key that is depressed. The sound generator disclosed can provide very realistic simulations of the flute, oboe, trumpet, French horn, trombone through the provision of various types of modulations in amplitude and frequency of the various partials, as is characteristic of each instrument simulated, and filtered noise. Glissandi are provided from one note to another and are controlled from the pair of keys involved by the relative pressure with which they are depressed. For the nonpercussive tonalities, the speed with which a key is depressed, which is determined by differentiating the force, may be used to cause the attack transient to behave in a manner very characteristic of the instrument being simulated.

Abstract: In a mechanical seal with rubbing slide ring and counter ring elements, an annular distributor guiding element which defines the annular channel guiding coolant and lubricating liquid to the interface between the elements is axially displaceable between limiting stops. The distributor guiding element tapers inwardly to define an inner orifice closely surrounding one of said ring elements or a ring form holder therefore to define an annular passage which constitutes a liquid flow regulating area.

Abstract: A new, performer played, real time, multitonal, multimbral musical instrument consists of speed and force sensitive keys in which time domain multiplexing is used to find and associate one and only one tone generator, not otherwise busy, with any key that is depressed. The sound generator disclosed can provide very realistic simulations of the flute, oboe, trumpet, French horn, trombone through the provision of various types of modulations in amplitude and frequency of the various partials, as is characteristic of each instrument simulated, and filtered noise. Glissandi are provided from one note to another and are controlled from the pair of keys involved by the relative pressure with which they are depressed. For the nonpercussive tonalities, the speed with which a key is depressed, which is determined by differentiating the force, may be used to cause the attack transient to behave in a manner very characteristic of the instrument being simulated.

Abstract: According to the invention, there are a plurality of insulatedly separated fixed contact means for connection to external circuits, movable contact means for selectively interconnecting predetermined ones of the fixed contact means, armature means movable in first and second opposed directions for coacting with the movable contact means for establishing a predetermined interconnecting relationship among the fixed contact means, and means coupling the movable contact means to the armature means responsive to movement of the armature means in the first and second directions for establishing first and second different interconnecting relationships, respectively, among the fixed contact means.

Abstract: A roller assembly for drawing webs of plastic film or the like comprises an elongated shaft disposed laterally to the direction of web movement with multiple resilient roll portions along its length. Each of the roll portions has multiple roll segments each separately replaceable to allow compensation for uneven wear along the length of the shaft.

Abstract: A new vacuum cleaning nozzle described includes a conventional vacuum cleaner suction nozzle typically used for cleaning streets or carpets and in addition short airfoils at incidence or vortex generating air nozzles supported from the nozzle and directed downward ahead of the suction nozzle to form a series of vortices for providing very high local velocities effective in dislodging debris while avoiding propelling the particles dislodged far from the suction zone.