Abstract: Apparatus for thermal oxidation of silicon wafers at high pressures of a type wherein a reactor of a refractory material is disposed within a pressure vessel, and wherein a margin of a wafer portal of the reactor and a closure of the refractory material have congruent surfaces enabling a hermetic seal to be effected, an improvement is disclosed wherein the closure is mounted within a pressure-vessel head used to close an access portal of the pressure vessel by means of gimbals, whereby a hermetic seal can be effected at said surfaces despite misalignments.
Abstract: In a deep fryer of a compact, portable type comprising a vessel, a handle, which is mounted to the vessel, a basket, which is adapted to be lowered and raised within the basket, a cover, which fits removably onto the vessel so as to cover the vessel, and means for lowering and raising the basket within the vessel while the vessel remains covered by the cover, wherein the handle has opposite ends mounted pivotally to opposite sides of the vessel, an improvement is disclosed wherein the basket lowering and raising means comprises a pair of pins, each of which is attached to one of the ends of the handle so as to rotate as the handle is pivoted, and which are linked to the basket so as to lower and raise the basket within the vessel as the handle is pivoted oppositely.
Abstract: A shaver includes a housing and a shaving head detachably secured to the housing. A modular cutting assembly is detachably mounted in the shaving head and includes a plurality of blades that are reciprocated within the head for cutting hair. The blades are joined together by pins and releasably secured to a mounting block. A biasing element secured between the mounting block and the blades biases the blades away from the mounting block to provide a floating connection. The mounting blade is slideably positioned on a clip that is resiliently positioned within the shaving head. The shaver also includes a modular clipper assembly including a pair of blades reciprocally mounted within the shaving head. A clipper guard is slideably mounted in the housing for movement toward and away from the clipper blades and includes at least one sloped slot and a cutout portion with an inclined edge including at least one detent.
January 2, 1979
Date of Patent:
November 18, 1980
George P. Gallanis, Albert R. Spohr, Robert R. Lube
Abstract: For a vacuum pump, as used to maintain a partial vacuum in a diffusion furnace for chemical vapor deposition in intermittent runs wherein oil for the vacuum pump becomes contaminated by particulates, an apparatus for removal of particulates from oil for the vacuum pump comprises a settling tank, which is connected to receive oil from the vacuum pump, an oil pump, which is arranged to pump oil from the settling tank, means for filtering particulates from oil pumped from the settling tank, a plurality of oil valves, which are arranged to control flow of oil from the vacuum pump, through the settling tank, through the filtering means, and into the vacuum pump, means for operating the oil pump and opening the oil valves for timed intervals wherein oil flows from the vacuum pump, through the settling tank, through the filtering means, and to the vacuum pump, and means for coordinating the intervals with the runs so that each interval is initiated approximately when a run is terminated.
Abstract: An electrical hot air grill includes a control and stand unit, a blower and heating unit, a grilling compartment bounded by two shells, a device for supporting articles to be grilled in the grilling compartment and an apertured plate mounted on the blower and heating unit and arranged between the blower and heating unit and the grilling compartment.
January 29, 1979
Date of Patent:
October 7, 1980
Hans-Juergen Geissler, Peter Mueller, Manfred Oppelt, Horst Schoener, Franz A. Stuetzer
Abstract: A motor control circuit is provided for an appliance or the like of the type utilizing a speed adjustment device that controls an adjustable centrifugally controlled governor device. The governor includes a switch contact arrangement which is connected in the triggering circuit of a power switching device, a TRIAC for example, for selectively connecting the motor of the appliance to the power source connections. The switch contacts of the governor device open and close as the rotational speed of the motor increases and decreases respectively from the speed selected on the speed adjustment device. A variable impedance element mechanically coupled to and adjusted by the speed adjustment device is also provided in the triggering circuit of the power switching device in series with the governor switch contacts to vary the triggering of the power switching device as the speed setting is varied. Thus, a variable speed versus motor supply voltage characteristic is provided when the governor contacts are closed.
Abstract: In a clock having a synchronous motor and a chime that is struck once evey half hour by a biased hammer assembly that is prevented from striking the chime except when a tab on the hammer falls into a notch on a wheel driven by the minute shaft, a chime shutoff is mounted on the back cover of the clock for movement between a chime "on" and a chime "off" position.