Abstract: A composite test signal which consists of the combination of four audio modulated carriers is developed and injected into the stereo audio circuits of a Beta type VCR. The audio output of the VCR is observed or listened to in order to determine if the circuits downstream of the point of injection of the test signal are operating correctly.
Abstract: The capstan and drum servo systems of a VCR are tested by processing the capstan reference signal and the drum reference signal in a microprocessor and displaying information which is useful in diagnosing any defects in either of the servo systems.
Abstract: An improved filter candle is provided for filtering entrained particulate matter from hot gasses. The filter candle is constructed ceramic fibers bonded together into a porous unitary tubular mask having a bottom end and an annular flange at the top end. The top and bottom ends of the filter have substantially higher density than the tubular mid-section of the filter and as a result, the strength of the end portions of the filter is enhanced, and the ends are therefore less susceptible to damage.
Type:
Grant
Filed:
March 23, 1992
Date of Patent:
August 24, 1993
Inventors:
James F. Zievers, Elizabeth C. Zievers, Paul Eggerstedt
Abstract: An hydraulic rotary device includes a rotor which is oscillatable in a cylindrical chamber to force hydraulic fluid through a bypass conduit from one side to the other of a stator mounted in the chamber. An adjustable fluid flow restrictor is mounted in the bypass conduit and is controlled by a computer to which signals representative of the pressures on either side of the rotor and the angular position of the rotor are applied to enable adjustment and control of the speed of the rotor and/or the force required to rotate the rotor in the chamber.
Abstract: A ceramic filter candle is formed by a skeleton of ceramic fibers and spaced apart metallic perforate reinforcing members bonded together by means of a ceramic binder and a porous ceramic coating material which partially fills the interstices between the fibers and the perforations in the reinforcing members. The candle is manufactured in a vacuum forming process wherein an aqueous slurry of the ceramic fibers and a ceramic binder is drawn through a generally cylindrical mold surface and the preformed tubular reinforcing members to deposit the fibers on the mold surface and over the reinforcing members. The fibers and the reinforcing members are subsequently coated with a ceramic material.
Abstract: A combined hold-down and manifold member is formed of ceramic and holds a plurality of candle filters in sealing engagement with a ceramic tube sheet from which the filters are supported. The hold-down and manifold member supports a plurality of gas nozzles over the open ends of the candle filters to direct pulses of cleaning gas into the filters.
Type:
Grant
Filed:
August 8, 1991
Date of Patent:
May 11, 1993
Inventors:
James F. Zievers, Elizabeth C. Zievers, Peter Aguilar, Paul Eggerstedt
Abstract: A new and improved method and apparatus, for use in video systems such as VCRs, for frequency modulating a phase locked loop with video information by modulating a video carrier signal with a video signal without alerting the frequency of the sync pulses is disclosed wherein the video modulated carrier signal is sampled during the occurrence of the sync pulses and any difference between the actual sync pulse frequency and a standard sync pulse frequency is used to adjust the frequency of the carrier frequency oscillator to bring the sync pulse frequency to the standard value.
Abstract: Dispensing apparatus incorporates a pressurized liquid reservoir and associated manually operable dispensing valve and a pressurized gas reservoir and associated manually operable valve respectively connecting the reservoirs to a common spray orifice. The valves are adapted to be simultaneously operated whereby a metered burst of gas from the gas reservoir breaks up a metered burst of liquid from the liquid reservoir. The liquid dispensing valve has a discharge bore through which the liquid is discharged and a check valve such that the pressurized reservoir may be refilled through the discharge bore.
Abstract: Voltage sensing circuitry monitors the signal input lines of a standard RS232 serial data interface. The voltage levels at the inputs of the interface are compared to known voltages to determine if the correct interconnections have been made between the interfaced devices. If the interconnections are determined to be incorrect, a switching circuit is enabled to correct the faulty connections, and serial data transmission is thereafter initiated.
Abstract: A resilient member having a central section is adapted to fit against the chest of the infant and two generally parallel downwardly extending side sections are adapted to fit snugly under the arms and against the sides of the infant. The central section has an extension which extends over the neck such that when the member is fitted over the chest of an infant, with the sides under the infant's armpits, the extension is in proximity to the chin of the infant. An inclined groove is provided along the upper surface of the extension for frictionally holding a nursing bottle in an inclined angle relative to the mouth of the infant.
Abstract: A strong and light weight tubular structural member is formed of a fibrous ceramic mat-like skeletal base filled with a ceramic binder. The ceramic filled base is coated in a chemical deposition process with a thin ceramic skin which is molecularly bonded to the base and which greatly strengthens the member and increases its useful life when it is used in contact with high temperature furnace gasses. The use of such tubular members in cross-flow filter elements to separate planar ceramic filter elements and the use thereof to strengthen ceramic tube sheets in pressure type tube filters is disclosed.
Abstract: In a fluid dispenser a spring biased piston is mounted for reciprocable movement along a stem member which is moved longitudinally to actuate the dispenser. A metering chamber is located between the end of the piston and the end wall of a cylindrical chamber in which the piston is mounted, and axial passageways extending from opposite ends of the stem connect the metering chamber to a discharge location when the stem is in a discharge positon and connect the metering chamber to a fluid reservoir when the stem is in a fill position.
Abstract: An organ retractor includes a tubular introducer which is adapted to be inserted through a body into an underlying body cavity and a multi-fingered tool which is insertable into through the body wall into the body cavity. The fingers are formed of a spring material and have a naturally curved configuration so as to spread out when pushed beyond the distal end of the introducer. A plurality of filaments attached to the fingers provide bridges when the fingers are in the extended positions.
Abstract: There is disclosed a system for the installation of one or more shelves in a cabinet. Included in the system are a pair of shelf guide rail assemblies which are adapted to be respectively mounted to the side walls of a cabinet for slidably receiving the shelves. The shelves are each of two-piece construction and adjustable in length. The shelves may be provided with a rearwardly disposed slot for receiving the plumbing when the system is installed in a cabinet into which a sink has been installed. A number of precut filler pieces are provided for the filling the spaces between the top surfaces of the respective sections of the shelves.
Abstract: A pressure filter includes a filter tank into which a rigid outlet conduit extends, and a plurality of clusters of filter tubes are suspended in the pressure chamber within the tank from a multi-tube manifold which is connected to and hangs from the outlet conduit. In the disclosed embodiment a purality of outlet conduits and associated manifolds and filter tubes are disposed within a single filter tank.
Type:
Grant
Filed:
September 5, 1989
Date of Patent:
October 6, 1992
Inventors:
James F. Zievers, Paul Eggerstedt, Elmer Kulousek
Abstract: A cable connector for attaching a cable having stranded wires enclosed in an insulated enclosure has a metal plate attached to the stranded wires. A threaded bolt is passed through an aperture in the metal plate and held in position by a nut. The parts, with the exception of the portion of the threaded shank extending beyond the nut, and the outer surface of the nut are hermetically sealed in an insulating enclosure. Finally a malleable sleeve of conductive material is fitted over a portion of the uncovered threaded shank of the bolt. When the shank of the bolt and the sleeve are passed through an aperture in a bulkhead or other conductor member, and a nut tightened on the end of the bolt projecting through the conductor member, the malleable sleeve is longitudinally compressed causing it to radially expand within the aperture in the conductor member.
Abstract: A snap lock will hold in assembled relationship two tubular parts one within the other in telescopic relationship. The locking mechanism has a rectangular base with rectilinear outer ends and a button urged by a spring perpendicularly away from the base. The base will slide within tracks along the inner walls of the male tubular part and the button will project through an aperture in the wall of the male part which is complementary to the shape of the button. The female tubular member has an aperture in its walls which is also complementary to the shape of the button such that the button will project into the aperture in the female member when one aperture is aligned over the other.
Abstract: Exercise machines include a hydraulic torque resistance device having a rotor which is connected to a pair of vertically movable pedals. In one disclosed embodiment of the invention a vertically adjustable seat is provided in conjunction with a pair of handle bars respectively connected to the pedals in a manner such that downward movement of one of the pedals is accompanied by rearward movement of the associated handle bar. Simultaneously with the downward movement of one pedal the other pedal moves up and the other handle bar which is associated therewith the other pedal moves in the forward direction.
Abstract: An audio volume controller includes a variable gain amplifier which amplifies an audio signal and drives a sound transducer such as a loud speaker. A volume controller is responsive to the level of the audio signal to adjust the gain of the amplifier to maintain the level of sound reproduced by the speaker between manually adjustable minimum and maximum values. A second minimum level control is provided to set a predetermined minimum audio signal level below which the gain of the amplifier is not increased in an attempt to maintain the sound level above the manually adjusted level.
Abstract: A rotary engine includes a housing in which two rotors are mounted on mutually transverse axes and are provided with lobes which interact with the sides of the other rotor to provide compression and combustion chambers in which a fuel is compressed and subsequently fired to exert a torque on one of the rotors as the rotors rotate in synchronism.