Abstract: The bonding of smooth dental porcelain using glass-ionomer cement has hitherto been difficult. The present invention incorporates particles of an ion-leachable glass, particularly a calcium fluoroaluminosilicate glass, in the dental porcelain and improves the bonding properties.

Abstract: Laboratory fume hoods with open hood faces closed by door sash are provided with an automatic airflow control regulating the quantity of air drawn into the hood in response to movement of the door sash for maintaining a controlled velocity of air through the hood face to keep fumes within the hood while reducing energy requirements for either heating or cooling the air to maintain safe operation. The open hood face is controlled by a vertically slidable sash or window counterbalanced by a weight that is connected to the sash by a cable which moves directly proportional to the movement of the sash. This cable actuates mechanism for opening and closing a damper in the exhaust system for the fume hood. In one embodiment, the cable drives a pressure regulator which controls an air motor to rotate the damper. In other embodiments the cable may drive reduction gear to the damper or control a servo motor which drives the damper.

Abstract: An optical device coupling light between a first light waveguide and either a second light waveguide or a radiation source characterized by the first light waveguide having a core of a predetermined cross-sectional area, a reflective layer or mirror of a high reflectance being disposed on an angle to the axis of the waveguide and occupying only a small portion of the total cross-sectional area of the core so that only a small portion of the light traveling in the core of the first waveguide will be blocked by the presence of the mirror. The second waveguide will have a core diameter substantially smaller than that of the first waveguide and the mirror is mounted in the first core adjacent to the connection with the second core. The radiation source may be either a laser diode, semi-conductor laser or a light emitting diode.

Abstract: In an exemplary embodiment, a measurement network at a bedside monitoring station can be sequentially stepped through a series of measurement modes either at a bedside monitoring station or at a central monitoring station. A serial in parallel out shift register has successive active positions corresponding to the successive measurement modes and may be stepped either by means of a local push button switch, or by means of a respective corresponding push button switch at the central station. At the central station, a decade counter and decoder arrangement drives a numerical readout for each local station for the purpose of representing each of the local measurement modes. A series of reset circuits couple the outputs of the first shift register stages of the respective local stations with the reset input of a corresponding decade counter such that each time the associated shift register stage is placed in an active state the counter is placed in an initial count condition.

Abstract: A nut cracker includes a base that supports an adjustably fixed anvil member and a moveable ram member under the control of a handle, there being a guide interconnecting the ram member with the base which maintains the ram member in an erect position. The confronting faces of the anvil member 17 and the ram member 27 are provided with recesses into which the ends of the nut are received with clearance so that the outer rim of such recesses engage the nut to provide the cracking force to its shell remotely from the ends of the nut. With this construction, a heavy-duty unit is provided which is especially useful for cracking nuts that have hard or strong shells such as black walnuts and butternuts, and the construction further enables the shells to be broken and nut meats recovered in larger pieces without over-cracking.

Abstract: A logic module is disclosed for construction in an integrated digital circuit for promoting testing of the integrated circuit. A latch module is provided for functioning as a latch, as a back-coupled shift register, and in one embodiment of the invention as a linear shift register. The latch module is formed of a plurality of basic cells each of which has a flip-flop with associated logic gates, one of which is an exclusive OR gate. The latch module also has an input, parallel data inputs and parallel data data outputs. For functioning in the back-coupling mode, an exclusive OR gate is connected between at least one of the flip-flops and the input to the latch module.

Abstract: Two DC motors are driven by switching pulse drive circuits, and the switching on times of drive pulses are made to be out of phase with each other at the two switching pulse drive circuits. One of the two DC motors rotates rotary video heads, and the other drives a capstan of a video tape recording and/or reproducing apparatus. The drive pulses are preferably synchronized with horizontal synchronizing pulses of a video signal to be handled by the video tape recording and/or reproducing apparatus in order to avoid pulse noises.

Abstract: A passive display device particularly useful for signs and reflectors and not requiring any light source characterized by a device for entrapping light and then emitting entrapped light at given positions at an increased intensity. The device for entrapping light includes at least one transparent fluorescent member having an index or refraction greater than 1 and containing fluorescent particles which collect impinging light by fluorescent scattering with subsequent reflection on the boundary surface of the member and the device has output coupling zones which are disposed on one of the members such as the fluorescent member in a desired pattern for uncoupling light from the device in a desired pattern. The device may include phosphorescent particles, which will emit light during periods of darkness and which may be either scattered through a member or applied at the uncoupling zones so that the light being uncoupled is a phosphorescent light.

Abstract: In an exemplary embodiment, several measuring channels include amplifier circuits subject to zero point drift during measuring signal interruptions. For each measuring channel of the radiation receiver, a register comprising a plurality of memory locations for correction values is present, whose input is connected to the measuring channel output following the amplifier circuit and whose output is connected to the measuring channel input in front of the amplifier circuit. Each register supplies to the associated measuring channel input a correction signal having a value in dependence upon the measuring channel output signal during a preceding signal interruption and such as to correct for any zero point drift of the amplifier circuit.

Abstract: A furnace for burning dry or wet wood waste products such as hogged bark and the like is provided with a grating therein comprised of aligned rows of bricks resting on supporting cross beams, with at least some of the rows of bricks maintained a uniform distance from other rows of bricks by spacers disposed between such spaced-apart rows of bricks. The furnace is charged by turbulent air entering both above and below the grating, with a select portion of such air being pre-heated. A temperature gradient is established between an area immediately beneath the grating and the area above the grating in the range of 2200.degree. F. and can be controlled by selected initial placement of the bricks and spacers to achieve an optimum cross sectional area for flow of heated, turbulent air through the grating to produce a temperature for efficient heating, drying and burning of wood waste products in an essentially pollution-free manner.

Abstract: A furnace for burning dry or wet wood waste products such as hogged bark and the like is provided with a grating therein comprised of aligned rows of bricks resting on supporting cross beams, with at least some of the rows of bricks maintained a uniform distance from other rows of bricks by spacers disposed between such spaced-apart rows of bricks. The furnace is charged by turbulent air entering both above and below the grating, with a select portion of such air being pre-heated. A temperature gradient is established between an area immediately beneath the grating and the area above the grating in the range of 2200.degree. F. and can be controlled by selected initial placement of the bricks and spacers to achieve an optimum cross sectional area for flow of heated, turbulent air through the grating to produce a temperature for efficient heating, drying and burning of wood waste products in an essentially pollution-free manner.

Abstract: In an exemplary embodiment, a control loop for the x-ray tube current is present which adjusts the x-ray tube current to a value which is a function of the exposure time and the selected mAs-product. In order that deviations of the x-ray tube voltage from a desired value can be controlled via the x-ray tube current, but that the mean value of the x-ray tube current can nevertheless be kept constant, a phase angle control device, arranged in the primary circuit of the high voltage transformer, can be present as the regulating unit for the mean value of the x-ray tube current. As controller for the x-ray tube voltage, a circuit for the adjustment of the filament current of the x-ray tube can be provided.

Abstract: A harness frame for looms includes a pair of parallel spaced vertical side plates, and a pair of heddle-support bars extending perpendicularly from the vertical side plates. Each of the vertical side plates has an intermediate portion which, in horizontal cross section, extends at right angles to the general plane of the harness frame.

Abstract: A method and apparatus for cutting each light waveguide of a plurality of light waveguides which are assembled in a cable of light waveguides characterized by an anvil positioned between a pair of common clamps for holding the waveguides parallel to each other with one clamp being biased away from the other clamp, a lifting device for lifting each of the light waveguides sequentially one after another so that the lifted waveguide carries all of the tension provided by the force acting on the moveable clamp and a notching device for simultaneously notching or scratching the lifted waveguide to cause separation of the waveguide at the notch.

Abstract: A splicing device for connecting light waveguides together by utilizing a splicing element having a centering groove for guiding the ends of the light waveguides therein characterized by a vertically moving support for the splicing element, a holding device at each side of the support being mounted for rotation on a horizontal axle and having a clamp for holding the end of the light waveguide at an acute angle to the base of the groove of the splicing element, each of the holding devices being mounted for movement in a horizontal plane so that the distance between the axles can be varied and an arrangement for controlling the movement of the axles of the holding device as a function of the angle of inclination of each device.

Abstract: In an exemplary embodiment a rotary anode motor is likewise supplied by the inverter circuit which is in the form of a full bridge with two pairs of alternately closable electronic switches. In one bridge diagonal the load (e.g. the x-ray tube) is disposed, while a d.c. voltage source is connected to the other bridge diagonal. The rotary anode motor is capable of connection, via a switch, to a connection point at one side of the load diagonal, and the bridge-half at the opposite side of the load diagonal is capable of being maintained in an open circuit condition during motor operation.

Abstract: An automatic down rigger control system is disclosed for use with a down rigger trolling line operated by a motor for raising and lowering the trolling line. Via the motor, the control system automatically lowers an end of the trolling line to a predetermined depth point and automatically raises the end of the trolling line to a predetermined surface point. Also, a manual operation mode is provided for selectively raising and lowering the trolling line to a depth other than the surface point and predetermined depth point.

Abstract: Method and device for the partial galvanization of a surface of a conductive material is disclosed. A flow-on channel and a flow-off channel are positioned at an angle relative to the surface at less than 45.degree. and arranged to direct the electrolyte solution at an angle onto the surface to be treated. The electrolyte is removed at an angle to the surface by the flow-off channel such that on the surface to be treated a substantially laminar flow arises. The flow-on channel and flow-off channel are constructed of a corrosion-resistant material. A metallic anode element is arranged in at least one of the flow-on and flow-off channels adjacent the area to be treated.

Abstract: A layer capacitance is disclosed having small dimensions and a high capacitance per volume. A carrier is coated on two frontal sides with metal contact layers. Metal layers and gas discharge polymerization layers are arranged one over the other in alternating fashion upon the carrier. On each of the two surfaces of the carrier, the metal layers extend to the contact layers where they are electrically connected.

Abstract: Structures composed of photosensitive resist are produced for semiconductor circuits by first generating a mask of a photosensitive resist onto a substrate and then applying a layer of a photosensitive resist over the entire surface of the substrate, including the first generated mask, so that such mask dissociates or dissolves by the material of the subsequently applied layer, which is then structured. In this manner, an improved adhesion of the resist structures to the substrate is achieved and simultaneously cleansing steps are eliminated. The inventive process is utilized for all processes during manufacture of semiconductor circuits wherein at least two photolithographic processes occur without the intervention of a high temperature step.