A method and device, employing positive-temperature-coefficient material, for sensing plural properties of a fluid, such as temperature and flow rate. Can be used in a wind gauge or in a device for sensing position of mechanical elements such as valve diaphragms. Single sensor device, with energy and ohmic resistors, produces two voltages which completely characterize temperature and flow rate of fluid under study.

A dual-function scavenger system, especially useful in conjunction with ovens for processing semiconductor materials, wherein the spent process gases from the ovens are separated from their residual thermal energy for disposition through discrete channels. Back diffusion of atmospheric air into the ovens is minimized.

A carrier for supporting a monitoring device during passage of the carrier and the monitoring device through a processing machine. The carrier is especially adapted for conveying temperature-recording instrumentation following circuit boards undergoing mass soldering of surface-mount and/or through-hole components.

A method, and apparatus for carrying it out, for processing pulses derived from a radiation detector, those pulses having already been resolved by a pulse-height analyzer into channels having respective addresses indicative of their respective heights. The method includes steps of receiving a plurality of channel-address values from the pulse-height analyzer, averaging over a window selected ones of the channel-address values to obtain an average channel address for the selected channel-address ...

A method, and apparatus for carrying it out, for processing pulses derived from a radiation detector, those pulses having already been resolved by a pulse-height analyzer into channels having respective addresses indicative of their respective heights. The method includes steps of receiving a plurality of channel-address values from the pulse-height analyzer, averaging over a window selected ones of the channel-address values to obtain an average channel address for the selected channel-address ...

This optical velocimeter may be installed in an aircraft to measure the true airspeed and the angles of attack and of sideslip of the aircraft. Alternatively, the velocimeter may be mounted in a wind tunnel to measure the velocity of the airstream passing through the wind tunnel. In either case, the points of reference for measurement are the large number of aerosol particles that are entrained in the air and are assumed to have the same velocity as the oxygen and nitrogen molecules of the air i...

A developer roll for use in electrophotographic copying machines and printers. The roll has a coating which is electrically conductive. Also disclosed are the materials comprising the roll and its coating, and a process for formulating the materials and for applying them to the surface of the roll by powder-coating.

This is an apparatus for sharpening and otherwise enhancing images such as those produced on a screen or on the face plate of a cathode-ray tube. Regarding an image as being composed of a very large number of elements called "pixels," the apparatus of this invention enhances those of the pixels which appear at points of rapid transition between light and shade in the image. The apparatus comprises a plurality of substrates superimposed upon one another, optically in series. A first such substrat...

A method and device, employing positive-temperature-coefficient material, for sensing plural properties of a fluid, such as temperature and flow rate. Can be used in a wind gauge or in a device for sensing position of mechanical elements such as valve diaphragms. Single sensor device, with energy and ohmic resistors, produces two voltages which completely characterize temperature and flow rate of fluid under study.

This Yagi-Uda-type antenna includes also a sleeve embracing the dipole. The sleeve may be a closed cylindrical element surrounding the dipole or it may comprise a pair of discrete elements forming an "open sleeve". The dipole, sleeve, reflector, and director elements may be in filamentary form, or they may be fabricated from stripline.