Abstract: A printing device for printing with drops of printing fluid, in which discrete droplets of a printing fluid are ejected from a printing element along a predetermined path to a recording surface. The printing element comprises a nozzle communicating with a printing fluid reservoir. A control electrode mounted on the nozzle is arranged to apply pressure pulses to printing fluid in the nozzle so as to eject discrete droplets of printing fluid from said nozzle.

Abstract: A method for improving adhesion of nonfogging film coatings comprising a block copolymer containing alternating blocks of polyurethane and a hydrophilic polyacrylic, to a polymeric substrate by subjecting the substrate to a controlled exposure to UV irradiation. Exposure may be prior to or following casting the nonfogging coating in place on the substrate. By varying the weight ratio of polyurethane/polyacrylic it is possible to vary the flexibility of the coating and hence to widen the range of substrates to which the coating may be applied, e.g., from flexible wrapping material to rigid mirrors.

Abstract: Apparatus for forming fibers of refractory materials. A melt volume is continuously formed on a feed rod of the material to be fiberized and a fiber drawn therefrom. The melt volume is formed by introducing the feed rod at a predetermined velocity into a heating zone. The fiber diameter is determined by the relative velocities at which the feed rod is moved and the fiber drawn, and by the fractional density of the feed rod material.

Abstract: A digital communication system for the transmission and reception of digitized information and capable of operation over a broad range of data rates without need for clock or timing information. The system employs as an input signal a multiple amplitude level signal having zero average amplitude which is converted to a multiple phase coded signal having zero average phase. The phase coded signal is transmitted over a communication path and upon reception is directly reconverted to a multiple amplitude level form without need for recovering clock or timing information.

Abstract: Described is an improved headgear support of the internal suspension system type for supporting the head in spaced relation within a rigid headpiece. The improvement comprises an elongated nape strap disposed adjacent the rear portion of the headpiece for contacting the nape of the wearer's neck. Each end of the nape strap is disposed adjacent respective opposite sides of the headpiece. Means are provided for tensioning the nape strap and for locking the nape strap in a tensioned state so that the wearer's head can be locked within the headpiece between the suspension and the nape strap. In one embodiment of the invention, the tensioning and locking means comprises a lever arm-ratchet bar assembly and in another embodiment, the tensioning and locking means comprises a spool assembly.

Abstract: Axial compliance/sealing means are provided for scroll-type apparatus. These means comprise seal elements associated with the involute wraps which are urged by an axial force to make sealing contact with the end plates of the opposing scroll members. The axial force may be pneumatically or mechanically applied and the resulting axial contact is of such a nature as to maintain the integrity of the radial sealing within the apparatus. The use of the axial compliance/sealing means allows the contacting surfaces through which radial sealing is effected to be machined to conventional accuracy, and provides automatic compensation for temperature differentials within the apparatus as well for any uneven wear of the scroll members.

Abstract: A scroll member is provided for use in scroll-type apparatus. It is formed of a separate end plate having an involutely configured groove in the face thereof and a separate involute wrap which is seated in the groove. The seating of the wrap in the groove may be such as to permit it to undergo small axial and radial excursions within the groove to impart compliance/sealing characteristics to the scroll member. Alternatively, the wrap may be rigidly mounted in the groove and, if desired, separate compliance/sealing means provided for the wrap. The construction of scroll members according to this invention achieves a marked decrease in cost of the scroll members and of scroll-type apparatus incorporating them.

Abstract: A positive fluid displacement apparatus employing scroll members having interfitting spiroidal wraps angularly and radially offset such that as one of the scroll members is orbited, moving fluid pockets of variable volume and different fluid pressures are formed. Axial load carrying of the scroll members is achieved pneumatically through the introduction of a fluid into a pressurizable fluid chamber within the housing and in axial force applying relationship with the orbiting scroll member. The pressurizable fluid chamber may constitute essentially all or only a part of the internal volume of the housing and it is isolated from the fluid pockets. This type of axial load carrying materially reduces the loads which must be carried through the crankshaft and decreases the size and complexity of the bearings. The apparatus is particularly well suited to compressors operating at high exhaust pressures.

Abstract: Novel 7-alkyl-(and 7-cycloalkyl-loweralkyl)9-hydroxy-4,4-di-lower-alkyl-1,2,3,4-tetrahydro-[1 ]benzopyrano[3,4-c]pyrroles; 7-alkyl-(and 7-cycloalkyl-lower-alkyl)9-hydroxy-4,4-di-lower alkyl-1,2,3,4,3a,9b-hexahydro[1]benzopyrano[3,4-c]pyrroles, and certain ester and ether derivatives thereof. These compounds exhibit CNS activity, and are useful as sedatives or tranquilizers.

Abstract: An apparatus for delivering accurately metered volumes of a fluid at accurately spaced intervals. A pumping assembly including a cylinder, piston and fluid valving means are driven through a first cam which controls the volume of fluid pumped and a second cam, driven by the same synchronous motor used to drive the first cam, is used to control the engagement and disengagement of the first cam and hence to control the intervals between pumping cycles. When used as a smoking machine for animal tests, an additional air inhalation valve is provided and the apparatus is arranged to be connected to a gas reservoir attachable to the animal in a manner to create minimum interference with his normal breathing.

Abstract: Cooling means are provided for the stationary and orbiting scroll members of scroll-type apparatus. These cooling means comprise fluid coolant channels in the end plates and in the involute wraps of the scroll members and means to circulate a fluid coolant therethrough. In the case of the stationary scroll member the coolant may be water, oil or the like; while in the case of the orbiting scroll member the coolant is the lubricating oil used to lubricate a thrust bearing and the coupling means. The resulting effective cooling of the scroll members makes it possible to form scroll apparatus in large sizes.

Abstract: Apparatus is provided for forming, by the Czochralski technique, single semiconductor crystals having essentially uniform diameters throughout their lengths. The apparatus includes means to monitor and control crystal diameter which takes advantage of the fact that the melt volume from which the crystal is pulled and the dielectric crucible containing the melt volume can be incorporated in a crucible assembly circuit in which the resistance varies with the melt volume level in the crucible. Determination of the difference between the measured resistance in the crucible assembly circuit and a programmed reference resistance produces a signal which is used to control one of two operational parameters--the rate at which the crystal is pulled or the temperature of the melt volume--to produce a uniform-diameter crystal.

Abstract: A microwave modulator especially adapted for use in a digital microwave transmitter and capable of operation over a broad range of data rates and carrier frequencies. The modulator is operative with a multiple level modulation signal having zero average amplitude and provides in response thereto a multiple phase coded signal having zero average phase. A plurality of microwave diodes are disposed in spaced relation along a transmission line and are operative in response to control inputs derived from the modulation signal as signal reflection means to phase modulate the microwave carrier signal.

Abstract: A digital light responsive switching circuit in which a plurality of photosensors are respectively responsive to different sources of illumination and in which the electrical input channels are independent and each operative to provide digital output signals representative of sensed illumination levels.

Abstract: A process for bonding a copper or nickel end junction piece to an aluminum electrical conductor wire. The copper or nickel end junction piece is used to make the electrical connection with terminals in meters, fuse boxes, switches and the like, thus eliminating such junctions with the aluminum wire and hence eliminating the possibility of the formation an aluminum oxide connection which may give rise to overheating and subsequent fire. The end junction pieces may be applied on-site after the aluminum wire is cut to the desired length. No special pretreatment of the aluminum wire end is necessary prior to the addition on the end junction piece.

Abstract: Method and apparatus for forming fibers of refractory materials. A melt volume is continuously formed on a feed rod of the material to be fiberized and a fiber drawn therefrom. The melt volume is formed by introducing the feed rod at a predetermined velocity into a heating zone. The fiber diameter is determined by the relative velocities at which the feed rod is moved and the fiber drawn, and by the fractional density of the feed rod material.

Abstract: Refractory tubings approaching theoretical density, either in polycrystalline or single crystal form, are made by moving a preformed tubing of a refractory material and a heated zone relative to each other, the heating zone providing sufficient heat to melt through the tubing and form a molten ring which is continuously advanced through the tubing. The heat source may be located externally or internally of the tubing wall or in both positions. The tubings may be formed as single crystals; and by controlling the rate of movement of the tubing sections on either side of the molten ring the wall thickness and diameter of the final tubing may be adjusted.

Abstract: Novel thienobenzopyrans and thiopyranobenzopyrans represented by the formula ##SPC1##Wherein m and n are each 0, 1, 2 or 3 and m + n is 2 or 3; R.sub.1 is loweralkyl; R.sub.2 is alkyl or cycloalkylloweralkyl and R.sub.3 is hydrogen, loweralkyl, loweralkanoyl, carbamyl, N-loweralkylcarbamyl, N,N-diloweralkylcarbamyl, phosphonyl, hemisuccinate or an ester of another such acid, phosphate, dialkylaminoalkyl of the structure ##EQU1## or acid addition salt thereof, or dialkylaminoalkylanoyl of the structure ##EQU2## or acid addition salt thereof, wherein x is 1 through 6 and R.sub.4 and R.sub.5 are loweralkyl; the loweralkyl groups containing from 1 through 6 carbon atoms, the alkyl groups containing from 1 through 20 carbon atoms and the cycloalkyl groups containing from 3 through 8 ring carbon atoms. Novel intermediates for the synthesis of these compounds are also disclosed as well as methods for making the compounds.

Abstract: An electronic timer switch adapted for installation in a standard switch receptacle and operative in response to applied AC power to provide a manually selectable operative duration. The timer switch is manually actuable to select an intended time interval and employs electronic circuitry for counting pulses derived from the input power frequency and to cause activation of a power switch during the selected interval. The switch can include indicators denoting selected and remaining time intervals and can include circuitry providing a warning indication of the approaching end of a selected interval.

Abstract: A fluent product dispenser in which the product is dispensed by means of compressed air has a dispenser body having a dispensing means therein for mixing and dispersing the fluent product and compressed air has a piston-cylinder means thereon by which the air is compressed, and when it reaches a certain predetermined pressure, is suddenly released. The fixed member of the piston-cylinder means has a fluent product containing recess opening toward the movable member of the piston-cylinder means, and a product pressurizing piston in the product containing recess has an end exposed toward the movable member or the piston-cylinder means. A product control valve means controls the flow of product from the product containing recess to the dispensing nozzle through the body. Likewise, a compressed air valve opens to permit flow of compressed air through a compressed air path in the body to the nozzle when the compressed air reaches a certain predetermined pressure.