Abstract: An amplifier, suitable for use in a limited band at microwave frequencies, incorporates a single lossless feedback coupling element between the input port and output port of the gain circuitry. The feedback element is formed of two coextending conductors of a length on the order of a quarter wavelength of the center frequency of the band. An input signal is coupled to the gain element through one of the feedback conductors. An output signal is coupled from the output port of the gain element through the other of the conductors of the feedback element. Relatively low closed loop gain, on the order of 10 dB, is achievable over the specified band at center frequencies on the order of 800-1000 MHz.

Abstract: In a pneumatic control circuit, five three-port, two-position, directional control valves, three of which have manual controls, and two shuttle valves are arranged for controlling a first pneumatic device and a second pneumatic device in an operating mode wherein the second pneumatic device cannot be readily enabled before the first pneumatic device is enabled. A first control valve having a manual control is arranged to control the first pneumatic device. A second control valve having a pilot valve is arranged to control the second pneumatic device. A pilot control valve having a manual control is arranged to connect the first control valve to the pilot valve of the second control valve via a shuttle valve. A holding control valve has a cam control, which is operated by the second pneumatic device, and has an outlet connected to the pilot valve of the second control valve.

Abstract: A tamper-evident dispensing closure is provided with a base suitable for attachment to a container. The base has a deck defining a dispensing orifice and an anchor-receiving opening with an adjacent anchor-retention structure. A lid is provided to close the orifice and defines an aperture spaced from the dispensing orifice when the lid is seated on the base. A tamper-indicating element is provided with an anchor retained in the opening below the deck in the base. The element has a first segment extending from the anchor through the base opening, between the base and lid, and through the lid aperture. A second segment extends from the first segment and is disposed adjacent a portion of the lid to inhibit movement of the lid from the closed position. A first frangible connection joins the first and second segments at the lid aperture. Preferably, a second frangible connection joins the first segment to the anchor at the anchor-receiving opening in the base.

Abstract: Tenter for an endless fabric, especially for use by heat treatment as a part process in connection with manufacturing of fabric for a paper machine comprising several carriages (1) for guiding the rims of the fabric material by means of a carrier (2) for each carriage (1) which is connected with a drive chain. Each carriage (1) comprises at least one spring (4) arranged between the carrier (2) and an abutment in the carriage (1) such that the velocity of each carriage (1) substantially corresponds with the speed of the fabric rim. It also includes a mechanism for registering and monitoring the tension force in the material based on which the velocity of the drive chain and the carrier (2) is adjusted to maintain a desired velocity for the fabric through the heat treatment zone.

Abstract: An interactive learning system for providing various modes of instruction relating to a syntax-intensive subject matter such as a computer program language. The modes of instruction may include a video lesson mode of instruction, a reference text mode of instruction and a syntax analysis mode of instruction in which the user attempts to answer questions presented by the system. The user's entries are analyzed for proper syntax and if any errors are found therein, the user is provided visual feedback relating to any errors found in the entries.

Abstract: A silencable photoelectric-type detector includes a source of radiant energy and a detector. A generator circuit provides a sequence of pulses to energize the source. A biasing circuit biases the detector. The detector can be temporarily silenced, when in alarm, by reducing the energy level of the pulses or altering the bias point of the detector for a period of time. The period of time can be established by an RC circuit. The effect of the energy level reduction or the bias point alteration is to reduce the sensitivity level of the detector temporarily.

Abstract: A foamed adhesive insulation, consisting of a mixture of a foamed adhesive material and a fibrous insulation material, is provided which adheres to a desired surface without the need for a retaining means to hold the mixture in place. While in the flowable state, the foamed fiber insulation can be molded to a desired shape and texture. The foamed fiber insulation adheres and can be applied to substantially any surface, such as wood, metal, masonry, concrete, or urethane, with virtually any orientation. The compression and tensile strengths of the layer of foamed fiber insulation can be selected by adjusting the mixture of foamed adhesive material and insulation particles. The foamed fiber insulation can include additives such as a dye to produce a substantially rigid insulation layer of a desired color, or a fire retardant material to produce a fire retardant insulation layer.

Abstract: An intermittently operated, indexing container conveying system is particularly configured for versatile use with an associated container filling apparatus. In distinction from previous arrangements, the present system includes a servo-drive motor for effecting intermittent indexing movement of a container-carrying endless conveyor. Programmable controls of the system facilitate operation of the system for optimizing efficiency, facilitating use of the system with containers of differing configurations, and with food products exhibiting varying physical properties (i.e., such as viscosities). The present system permits acceleration and deceleration rate of the conveyor to be selectively varied, as well as selective variation of indexing pitch and stop points of the conveyor.

Abstract: A microwave oven, in particular for rapid heating to high temperature, is disclosed. A cylindrical metal housing is open at one end and has a cylindrical side wall, into which a waveguide opens, the waveguide being coupled to a microwave generator. A first outer layer of a thermally insulative, microwave-transparent material and a second inner layer thereof are provided in a coaxial configuration. A metal sleeve provided with plural coupling slots is interposed between the outer and inner layers. A muff of a microwave-absorbing material is received within a central opening of the inner layer and constitutes a heating enclosure. A metal plate fitted with an access door is provided for closing the open end of the housing. An infrared pyrometer or a thermocouple may be provided for measuring temperatures in the heating enclosure. The heating enclosure may have a vent for evacuating fumes and an orifice for injecting gases.

Abstract: A shoe with detachable heel structure. The shoe readily replaces a worn or damaged heel by a new one due to the detachable heel structure. The shoe has a detachable heel, a heel mounting block and a cushion sandwitched between the heel and the block. The heel has a coupling recess and a pair of coupling arms. The heel mounting block has a projecting insert engaged with the coupling recess, a pair of sliders, a pair of receptacle holes receiving the coupling arms, a pair of arm hooks fixed in the sliders and engaged with the coupling arms, a small diameter shaft telescopically received in a larger diameter shaft with a slider returning spring fitted over the shafts, a guide pin for guiding the rectilinear movement of each slider, and a predetermined length of guide slot receiving the guide pin therein. The shafts couple the sliders to each other so that the sliders are elastically moved in opposed directions.

Abstract: A heating system for a vehicle having an internal combustion engine comprising a cylinder head defining an upper coolant chamber and a cylinder block defining a lower coolant chamber. A heater has an inlet in fluid flow communication with the lower coolant chamber of the engine and an outlet connected to a high point of the lower coolant chamber of the engine. A pump has a low pressure side connected to the lower coolant chamber of the engine and a high pressure side connected to a radiator and to the heater. A nonvariable in-line flow restrictor is disposed between the high pressure side of the pump and the heater for limiting coolant pressure on said heater at all flow rates of said pump.

Abstract: A staple cartridge for a surgical stapler includes a staple drive member which is driven by longitudinal movement of a cam through the surgical stapler for firing at least one surgical staple. The staple drive member comprises a staple drive element having a staple driving surface in association with the surgical staple for angular orientation of the surgical staple, when applied, with respect to the direction of movement of the cam. The staple drive member further comprises a cam contact element having a cam contact surface for being engaged by the cam, and an arrangement for pivotally connecting the staple drive element to the cam contact element.

Abstract: A method and apparatus for lifting an abdominal wall during laparoscopic diagnostic and surgical procedures. The surgical lift device includes a gripping portion for contacting and holding an external skin surface adjacent the abdominal wall. The gripping portion is selectively detachable from the skin surface. The device further includes a lifting portion that extends outwardly from the gripping portion. In accordance with alternative embodiments, the gripping portion may comprise an adhesive sheet or a suction member and the lifting portion may comprise a wire member or a portion of a hook and loop-type fastener.

Abstract: A radiation image read-out apparatus which comprises an optical system for exposing a stimulable phosphor plate (1) which contains a latent radiation image to a stimulating beam, and a light collector (3) for directing the stimulated light generated in the phosphor plate (1) to a photodetector (4), for example, a photomultiplier tube. Such read-out apparatuses often have the disadvantage that sufficient light cannot be collected into the photodetector. This problem has been solved by using a shiny mirror tube as the light collector.

Abstract: An apparatus for effecting synchronous, in-line placement of pads of material, such as a highly absorbent compressed composite laminate, includes a supply reel for supplying a continuous web of material. The web of material is guided to a pair of pull rolls which effect movement of the web at a first velocity V.sub.1. A cutting mechanism, preferably comprising cooperating knife and anvil rolls, cuts individual discrete pads of the material for presentation to an associated vacuum transfer drum. The vacuum transfer drum includes a peripheral surface operated at a second velocity V.sub.2 equal to or greater than the first velocity V.sub.1, with the velocity V.sub.2 equal to the linear speed of movement of an associated continuous substrate, such as comprising air laid comminuted wood pulp. The discrete pads of material are thereby transferred onto the substrate at a relative spacing S between adjacent ones of the discrete pads, which spacing equals L(V.sub.2 -V.sub.1)-L.