Abstract: There is provided an n.sup.+ -p-.pi.-p.sup.+ APD having a shallow and abrupt p-n junction located about 1 to 2 .mu.m into the APD and having a p-type conductivity region containing acceptors in an uncompensated excess concentration corresponding to a dose of between about 5 and 10.times.10.sup.11 acceptors/cm.sup.2. The combination of the shallow p-n junction and the doping profile in the p-type concentration region gives rise to an electric field profile having multiplication spread substantially throughout the entire thickness of the central active region of the APD and having no drift region. The electric field profile peaks adjacent the p-n junction in a value of about 2.9.times.10.sup.5 volts/cm. The electric field profile diminishes over the distance that the p-type conductivity region extends into the APD but remains at about 1.6.times.10.sup.5 volts/cm to maintain multiplication throughout the thickness of the active region of the APD.

Abstract: The invention relates to an avalanche photodetector having a charge-multiplication region which is spatially separated from the detector surface. This photodetector includes a light-absorptive region, an active region overlying the absorptive region forming a heterojunction therebetween. The photodetector includes a central zone which has a greater concentration of conductivity modifiers than the remainder of the active region and is located in the active region extending into the absorptive region. A cap region overlies the active region and has the opposite conductivity type. The cap region extends a greater distance in the lateral direction than the central zone. A photodetector having a central zone extending across the heterojunction between the active region and light absorptive region have exhibited response times comparable with those of photodetectors having a quaternary layer located between the active region and the absorptive region.

Abstract: A refrigerator door tray assembly includes a refrigerator door with an inner liner having a cavity defined by a rear wall and two forwardly projecting supporting side walls. Each of the side walls includes an inwardly projecting shoulder having an upwardly facing ledge that slopes downwardly toward the rear wall at a predetermined angle. A tray is provided for insertion into the cavity between the side walls. The tray comprises upstanding walls each having an outwardly extending arm. The arm has a downwardly facing surface that slopes downwardly at the predetermined angle such that the downwardly facing surface of the arm is adapted to at least partially engage the ledge during insertion and lie flush on the ledge once inserted into the cavity. The tray further includes laterally extending flanges adapted to engage the ends of the supporting side walls so as to cooperate with the arms and ledges to positively locate the tray in the door cavity.

Abstract: The fabric cleaning system for cleaning a fabric such as the wire on a paper machine includes a cleaning station through which the fabric continuously passes. In the station cleaning fluid is directed onto a surface of the fabric, contacts the fabric to remove at least some of the debris and is collected in a collecting chamber. The dirty fluid is cleaned of debris in a cleaner such as a screen and is then returned and re-used to clean the fabric. Preferably the cleaning fluid is applied to the fabric through slots with their outlet openings adjacent the fabric and formed by tapered passages that diminish in height in the direction of the travel of the fabric. Preferably the slots extend the full width of the fabric.

Abstract: A papermaking machine having a forming wire, a headbox and a forming board is disclosed. The headbox includes a lower slice having an apron positioned substantially in alignment with and closely adjacent the forming board such that as the forming wire travels over the the forming board the jet of paper stock leaving the headbox is laid onto the wire at the board at substantially zero angle of impingement. The forming board further includes a lead-in blade over which the wire travels. The blade acts to deflect fluid, normally pumped by the wire along its path of travel, away from the underside to the jet of paper stock prior to this jet reaching the forming board.

Abstract: There is disclosed a light emitting device which includes a header and an angle stripe light emitting diode. The header has a longitudinal axis and a forward mounting surface. The forward mounting surface includes a leading edge portion which extends perpendicular to the longitudinal axis. The mounting surface further includes a trailing alignment edge portion which extends rearwardly from the leading edge portion at a predetermined compensating angle. The light emitting diode is affixed in electrical and heat transfer relation to the mounting surface of the header such that the emitting facet is aligned with the trailing alignment edge portion of the header. The trailing alignment edge portion compensates for the offset angle that light is emitted from a stripe light emitting diode.

Abstract: There is disclosed an amplifier device for use with a photodetector for amplifying wave energy signals received by the photodetector and converted into electrical signals. The amplifier device includes a first amplifier having its input connected to a junction between the photodetector and first and second photodetector load impedances. A negative feedback amplifier is connected to the output of the first amplifier. The negative feedback amplifier provides a feedback voltage to the first load impedance when in its first mode of operation and effectively reduces the voltage feedback to the first load impedance when in its second mode of operation. A switching device is provided to effectively switch the second load impedance in and out of circuit with the photodetector to effectively change the photodetector load impedance and alter the bias voltage to the feedback amplifier.

Abstract: A photodetector array having reflector means positioned over the low response regions between elements of the array. Light incident on the reflector means is reflected into a high response region of the array. The invention also includes a method of forming the reflector means comprising the steps of forming wedge-shaped projections on the surface of a mold, coating the projections with a reflective material, filling the space between the coated projections with a transparent material and separating the mold from the material with the reflective layer adhered to the material.

Abstract: A reel bar loading device is provided having sloping storage rails located above the driving roll. The storage rails have lower ends that collapse bringing the reel into the initial winding contact with the driving roll. Once initial winding contact has been established, a transfer arm can be brought up to engage the reel and move the reel into a second winding position remote from the rails while keeping the reel in winding contact during this movement.

Abstract: A reel bar loading device is provided with a pair of lowering arms onto which reel bars are rolled one at a time, the lowering arms being pivotally movable from an upper position adapted to receive a reel bar on a supporting surface thereof and a lower transfer position while a reel bar rolls along the length of the surface into contact with an abutment and is moved downwardly with the lowering arms into position on a reel transfer device in the lower transfer position. The reel lowering arms are preferably provided with a cam stop that moves into stopping position to stop movement of reel bars into a loading position when the lowering arms are not in their upper positions.

Abstract: A web drier wherein the fabric carries the web to be dried around a plurality of drier drums in a sequence with at least one turning roll positioned between each roll in the sequence so that the web carried on the fabric is in direct face-to-face contact with each of the drums. The fabric is in face-to-face contact with each of the rolls between the drums and the web is held to the fabric by suction applied by blow boxes appropriately located relative to each turning roll. The rolls may be arranged in stacks with there being two turning rolls between adjacent stacks at one end of the stacks and none at the other. This arrangement improves the drying capacity of the drier by insuring that the web is in direct contact with the heated surface of the drier drums and may be used with existing 2-tier drier drum arrangements or with drums stacked higher or even as a single row of drums.

Abstract: A method is disclosed for making a termination between (a) a fiber optic cable having an optical fiber, a plurality of reinforcement strands positioned about the optical fiber, and a jacket positioned about the reinforcement strands; with (b) an electro-optic component housing having a tubular extension. In accordance with the method of this invention, in the initial step, a predetermined length of the outer jacket is removed from the fiber optic cable to expose a length of optical fiber and reinforcement strands. A rigid sleeve is then slideably placed onto the optical fiber until it extends a distance under the jacket and is retained thereby. The optical fiber is then hermetically sealed to the sleeve, suitably by solder introduced through one or more holes in the wall of the sleeve. The seal and the integrity of the fiber can be tested at this point, a decided advantage.

Abstract: A hinge structure is formed by at least two ears projecting from one side edge of a panel with each of the ears being provided with a lobe extending in the same direction from its respective ear and spaced from the edge of the panel to provide an undercut. The ears are adapted to be projected through cooperating slots in a second panel to which the first panel is to be hinged and slid laterally in the slots to position each ear on the opposite side of the second panel and out of alignment with its slot so that a portion of the second panel is received in the undercut or space between the adjacent lobe and the edge of the first panel. A tab moveable from an open position permitting insertion of the ear into one of the slots to a locked position to engage each ear in that one slot and prevent reverse movement of the first panel to move the lobes from behind the second panel is provided to lock the hinge parts together.

Abstract: Fiber optic connectors typically have a light reflection occurring at the fiber to air interface. This reflection may be minimized by a connector having a supporting means with an opening therethrough, a pellicle and having first and second major surfaces wherein the first major surface is attached to the supporting means and extends over the opening and a low refection coating on the second major surface. The connector may be assembled by supporting the fiber and positioning the pellicle such that the end face of the fiber is adjacent the first major surface. The connector may also be assembled by forming the supporting means, forming the pellicle and attaching the pellicle to the supporting means such that the pellicle extends over the opening.

Abstract: The invention relates to an avalanche photodetector having a charge-multiplication region which is spatially separated from the detector surface. This photodetector includes a light-absorptive region, an active region overlying the absorptive region and having a central zone which has a greater concentration of conductivity modifiers than the remainder of the active region. A cap region overlies the first region, has the opposite conductivity type and extends a greater distance in the lateral direction than the central zone. The invention is also a method of forming this detector comprising the steps of forming a first region of the active region, embedding an excess concentration of conductivity modifiers into a portion thereof and then forming a second region of the active region on the first region. A cap region of opposite conductivity type is then formed over the active region. The cap region has a greater lateral extent than the portion containing the excess concentration of conductivity modifiers.

Abstract: Apparatus for providing supplementary cooling to the thrust bearing of a vertical shaft machine, without requiring an additional exterior pump and motor, has an oil conducting path formed by grooves in the engaging surfaces of an upper and a lower portion of each bearing shoe. The oil conducting path terminates at an opening on either side of the outer periphery of the shoe. A nozzle is mounted in each opening. The nozzle extends upwardly with a horizontally extending nose portion with the nozzle opening in the end. The nose portion is adjacent the outer periphery of the rotating bearing ring which the shoes support. The ring is mounted to the vertical shaft. The shoes and the ring are immersed in an oil bath. Rotation of the shaft and the ring moves the oil adjacent the periphery of the ring. The nozzles are oriented in opposite directions, preferably facing one another.

Abstract: The cabinet of an appliance with a downwardly opening door is stabilized by a pair of legs each pivotally mounted to the cabinet on an axis fixed to the cabinet and oriental relative to the cabinet so that pivotal movement of each leg above its respective pivotal axis moves the foot of the leg forwardly and downwardly into a supporting position or movement of the door to closed position retracts the legs to their initial position.

Abstract: A web drier wherein the fabric carries the web to be dried around a plurality of drier drums in a sequence with at least one turning roll positioned between each roll in the sequence so that the web carried on the fabric is in direct face-to-face contact with each of the drums. The fabric is in face-to-face contact with each of the rolls between the drums and the web is held to the fabric by suction applied by blow boxes appropriately located relative to each turning roll. The rolls may be arranged in stacks with there being two turning rolls between adjacent stacks at one end of the stacks and none at the other. This arrangement improves the drying capacity of the drier by insuring that the web is in direct contact with the heated surface of the drier drums and may be used with existing 2-tier drier drum arrangements or with drums stacked higher or even as a single row of drums.

Abstract: A conventional clothes drier is provided with a rack structure mounted on the bulkhead that extends into and plugs the access opening to the drum of the drier. The rack is selectively mountable in either an operative extended position projecting cantilever fashion into the drier drum or alternatively in a retracted or storing position wherein the rack is contained within the bulkhead.

Abstract: An apparatus for providing and maintaining the alignment between a fiber and a device during the bonding of the fiber to the device and the subsequent assembly of a housing thereover is disclosed. The apparatus comprises a base, including means for holding the device, adjustably connected to a first support. A lower fiber holding means is attached to the first support such that it extends over the device holding means. An upper fiber holding means is attached to a second support which extends over the lower holding means. Means are also provided for securing the device housing above the lower fiber holding means.