Alternately Rotated Screw Patents (Class 74/59)
  • Patent number: 10598182
    Abstract: There is provided a ventilation apparatus with counter-rotating impellers driven by long shaft, wherein an electric motor and a gearbox are placed outside the air duct by using a long shaft with an internally disposed slim shaft extending therefrom, and are connected with the first stage impeller and second stage impeller inside the air duct by using the long shaft and slim shaft extending therefrom. In this ventilation apparatus with counter-rotating impellers, the components of the ventilation apparatus are placed inside and outside the air duct respectively by using the transmission shaft, which is convenient for maintenance and operation. By remotely arranging the impellers at an axial distance, the hub of the impellers will no longer be affected by an internally disposed electric motor, so as to reduce the ventilation resistance to ventilation. The impellers can be switched between the single impeller rotation and the counter rotation of two impellers.
    Type: Grant
    Filed: November 19, 2015
    Date of Patent: March 24, 2020
    Inventors: Ziming Kou, Juan Wu, Guijun Gao, Shanrong Da, Jing Zhang, Yanfei Kou, Ting Li, Sheng Li, Jin Wei
  • Patent number: 5918089
    Abstract: A modular control assembly for controlling a plurality of electromechanical components in a printing machine for producing prints on a substrate is provided. The assembly includes a body, a plurality of electrical components mounted onto the body. The assembly further includes a plurality of electrical conduits. Each of the conduits is electrically connected to at least one of the electrical components. The assembly further includes a plurality of electrical connectors. Each of the connectors is electrically connected to at least one of the electrical conduits. The electromechanical components are quickly electrically connectable and disconnectable to the assembly at the connectors.
    Type: Grant
    Filed: June 3, 1996
    Date of Patent: June 29, 1999
    Assignee: Xerox Corporation
    Inventors: Richard M. Malinich, Jonathan T. Abbe
  • Patent number: 5877570
    Abstract: A driving device of the massaging chair including a main shaft, a bevel gear mounted on one end of the main shaft, a worm rod mounted on another end of the main shaft, and a driving rotor mounted slidably between the bevel and the worm rod. When the main shaft is driven by a motor to turn forward, the driving rotor is engaged with the bevel gear to actuate a kneading shaft of the massaging chair. When the main shaft is driven by the motor to turn backward, the driving rotor becomes disengaged with the bevel gear and moves away from the bevel gear to engage the worm rod so as to actuate a beating shaft of the massaging chair.
    Type: Grant
    Filed: February 26, 1998
    Date of Patent: March 2, 1999
    Inventor: Yuan-Chuen Chen
  • Patent number: 5816098
    Abstract: A lifting load attitude controlling system includes a lifting load pivoting clutch (20) provided between a gyro frame (1) and a gimbal frame (6) for connecting and disconnecting therebetween. Also, a resetting rotating clutch is provided between a resetting rotation driving portion constituted of a resetting oblique rotation driving motor (19) for rotating a gimbal (8) upon returning the gimbal (8) at an initial position and a worm gear, and the gimbal (8) for connecting and disconnecting therebetween. Upon obliquely rotating the gimbal for returning to the initial position, the resetting rotating clutch is placed in the engaged or connected state and the lifting load pivoting clutch is placed in the disengaged or disconnected state. When the resetting rotation driving motor (19) is driven at this condition, a gyro moment is generated upon obliquely driving the gimbal toward the gyro frame (1) (lifting jig 4) via a variable constant torque motor (19) between the gyro frame (1) and a gimbal frame (6).
    Type: Grant
    Filed: October 16, 1996
    Date of Patent: October 6, 1998
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Hiroshi Kanki, Yoshitsugu Nekomoto, Tatsuya Wakisaka, Yasukuni Kamimura, Atsuhiro Doyama, Shuji Oyagi, Kazunari Fukuda, Yuichi Ikeda, Fumihiro Inoue, Koji Watanabe
  • Patent number: 5526851
    Abstract: An apparatus for controlling the motion of a weft insertion member in shuttleless looms, the apparatus includes: a triple-threaded variable pitch cylindrical cam, adapted to be secured to the weft insertion member; and a slider, which contains three roller seats to receive six frustoconical rollers, in which the six frustoconical rollers are divided into three groups, each group has two frustoconical rollers, each group of two frustoconical rollers is rotatably received by one roller seat and is located between two adjacent threads of the triple-threaded variable pitch cylindrical cam with different one of the two frustoconical rollers contacting different one of the two adjacent threads so that each thread of the triple-threaded variable pitch cylindrical cam is in mating engagement with two frustoconical rollers from two different groups of the three groups of two frustoconical rollers.
    Type: Grant
    Filed: April 24, 1995
    Date of Patent: June 18, 1996
    Assignee: National Science Council
    Inventors: Wen-Miin Hwang, Hong-Sen Yan, Shiemo Liaw
  • Patent number: 5320143
    Abstract: A mechanism controls the motion of the weft insertion member in shuttleless looms. This mechanism comprises a double-threaded variable pitch cylindrical cam and a slider having two pairs of frustoconical rollers. Each pair of frustoconical rollers is mounted on a thread of the variable pitch cylindrical cam. In operation, the cylindrical cam is able to rotate in a reciprocating manner by moving the slider in a rectilinear reciprocating manner. The mechanism is characterized in that the semi-conical angle of each frustoconical roller is formed such that the profile of the two threads of the variable pitch cam screw is easy to design and manufacture.
    Type: Grant
    Filed: August 14, 1992
    Date of Patent: June 14, 1994
    Assignee: National Science Council
    Inventors: Wen-Miin Hwang, Hong-Sen Yan, Rong-Shean Lee
  • Patent number: 5313850
    Abstract: This specification describes a completely new and different concept, method, mechanization, apparatus configuration and sequencing procedure for obtaining commercially useful energy and power, namely: the use of a gyroscope to generate output power from the earth's stored inertial rotational (flywheel) energy by fixing the housing of the gyroscope to the earth and using the rotation of the earth relative to the gyroscope's spatially stable rotor/gimbal assembly to rotate the input shaft(s) of a power transducer(s). This provides a power-output stroke over a near precession excursion (near pole-to-pole alignment) until the rotor spin axis of the gyroscope is nearly aligned with the polar axis of the earth. Re-precession torques are then created on the inner gimbal within the gyroscope to re-orient the rotor spin axis vector direction by re-precessing the rotor spin by somewhat more than
    Type: Grant
    Filed: September 8, 1992
    Date of Patent: May 24, 1994
    Inventors: Rodger C. Finvold, Paul E. Humphrey
  • Patent number: 5245880
    Abstract: A control system for, for example, a null-point gyroscope is provided in which, to minimize stiction, the control system is arranged to apply a decreasing oscillatory drive output to a precessed element of the gyroscope.
    Type: Grant
    Filed: August 20, 1992
    Date of Patent: September 21, 1993
    Assignee: GEC Ferranti Defence Systems Limited
    Inventor: James N. G. Scott
  • Patent number: 4879918
    Abstract: A gyro compass having a gyro case incorporating a gyro of which the spin axis is substantially horizontal, a vertical ring disposed around the outer periphery of the gyro case and for rotatably supporting the gyro case around a vertical axis, a follow-up pickup for detecting an angular displacement between the gyro case and the vertical ring around the vertical axis, an accelerometer having an input axis parallel to the spin axis, a vertical torquer mounted on the vertical ring for applying a torque of magnitude proportional to an input signal to the gyro case around the vertical axis, and a control apparatus for receiving an output signal of the accelerometer and for supplying its output to the vertical torquer, in which during a predetermined time after the gyro compass is started to operate, the output signal from the accelerometer is differentiated to produce a differentiation signal which is then supplied to the vertical torquer to reduce a settling time of the north-seeking action.
    Type: Grant
    Filed: October 27, 1988
    Date of Patent: November 14, 1989
    Assignee: Tokyo Keiki Co., Ltd.
    Inventors: Takeshi Hojo, Kanshi Yamamoto, Shinichi Kawada, Kazushige Murabayashi, Mamoru Akimoto, Michio Fukano
  • Patent number: 4852479
    Abstract: This invention relates to a postage meter having a plurality of worm gears for adjusting the rotational position of postage print wheels. Each worm gear selectively moves a rack which is an engagement with a postage print wheel so as to provide rotational movement to the print wheel. Sensors are provided so that the rotational position of each worm gear can be determined thereby indicating the position of the print wheels.
    Type: Grant
    Filed: December 7, 1987
    Date of Patent: August 1, 1989
    Assignee: Pitney Bowes Inc.
    Inventor: David W. Hubbard
  • Patent number: 4838099
    Abstract: A gyroscope employing a rotor in rolling contact with a ball positioned at the end of a drive shaft, the arrangement establishing a loose fitting ball and socket suspension for the rotor. Contact points of the rotor on the ball establishes the necessary pendulousities with the rotor center of gravity for damped gyrocompassing.
    Type: Grant
    Filed: June 25, 1987
    Date of Patent: June 13, 1989
    Assignee: Unisys Corporation
    Inventor: Thomas R. Quermann
  • Patent number: 4729250
    Abstract: A lead screw for moving, for example, a printing head or a magnetic head. The screw is molded from plastics by a split mold comprising a plurality of longitudinally extending sections. It has on its outer peripheral surface a helical groove satisfying the following relationship: ##EQU1## where P: pitch of the groove;R: radius of the screw;r: radius of the screw between its longitudinal axis and the bottom of the groove;.theta.: angle of division of the mold sections; andL: a half of the difference in width between the top and bottom of the groove. The bottom of the groove is smaller in width than the top thereof.
    Type: Grant
    Filed: January 23, 1986
    Date of Patent: March 8, 1988
    Assignee: Seikosha Co., Ltd.
    Inventors: Yoshiaki Ikeda, Yoshio Tamura, Hiroshi Noritake
  • Patent number: 4708024
    Abstract: A gyro apparatus comprising a gyro casing incorporating therein a gyro the spin axis of which is made substantially horizontal, a supporting apparatus for supporting the gyro casing with a freedom of three axes, a north-seeking apparatus for giving a north-seeking action to the gyro, a follow-up ring having a follow-up shaft which follows the gyro casing around its substantially vertical axis, a binnacle for supporting the follow-up shaft, a servo motor for rotating the follow-up shaft and a slip ring for supplying a power to the gyro and the like through the follow-up shaft, in which the follow-up ring is formed as a fork-shape and supported to the binnacle in a canti-lever fashion, the follow-up shaft is rotatably supported to the binnacle by one thin-type ball bearing having a large diameter and one bearing having a small diameter, the follow-up shaft is fixedly provided with a rotor of a pancake-type servo motor of a direct drive system, a stator of the servo motor is attached to the binnacle at the posit
    Type: Grant
    Filed: June 9, 1986
    Date of Patent: November 24, 1987
    Assignee: Kabushikikaisha Tokyo Keiki
    Inventors: Takeshi Hojo, Takafumi Nakaishi
  • Patent number: 4624288
    Abstract: In a mechanism to control the movements of the weft carrying grippers in shuttleless weaving looms--of the type wherein a gearwheel controlling the grippers carrying strap is caused to rotate forward and backward by a variable pitch cam screw, passing longitudinally through a slider which moves forward and backward along a forced rectilinear path--the slider carries structure engaging the threading of said screw and adapted to cause the rotation thereof, comprising opposed pairs of oscillating sliding blocks.
    Type: Grant
    Filed: May 31, 1985
    Date of Patent: November 25, 1986
    Assignee: Vamatex S.p.A.
    Inventor: Luigi Pezzoli
  • Patent number: 4597819
    Abstract: A wafer arrangement pitch altering apparatus comprising a pair of cylindrical grooved cams parallelly disposed, a plurality of cylindrical grooves formed to intersect a given generatrix of the grooved cams with respectively equal pitches, disposed symmetrically each other around the peripheral surfaces of the cylindrical grooved cams, and intersections of the generatrix and the cylindrical grooved cams are moved at mutually dissimilar desired proportions along the axes of the cylindrical grooved cams in consequence of its rotation, plural pairs of moving elements disposed between the cylindrical grooved cams facing each other and provided with pins fitting into the cylindrical grooves on the corresponding cylindrical grooved cams, a pair of means for retaining the moving elements in a manner movable only in the axial direction of the cylindrical grooved cams, a cylindrical grooved cam driving element for rotating the cylindrical grooved cams by a prescribed angle in the mutually opposite directions, main groo
    Type: Grant
    Filed: December 18, 1984
    Date of Patent: July 1, 1986
    Assignee: Tomco Mfg., Ltd.
    Inventors: Rei Kusuhara, Koichi Otsubo, Yasuo Yatabe
  • Patent number: 4558604
    Abstract: The invention relates to a directional gyro having two mutually perpendicularly arranged gimbals. The first or outer gimbal is fastened to a frame by means of a trunnion having a perpendicular axis. This axis is provided with an angle pickup to determine the course angle. The second or inner gimbal is provided with a gyro motor comprising a stator and a rotor, with the rotor axis being held in a horizontal orientation by means of a verticality device. According to the invention, the verticality device comprises an element which displaces the center of gravity of the inner gimbal and is attached, for example, to this inner gimbal, and an element which damps the rotary movement about one of the gimbal axis and which is formed, for example, of a ball bearing subject to a defined friction or of a slip brush.
    Type: Grant
    Filed: September 22, 1982
    Date of Patent: December 17, 1985
    Assignee: Teldix GmbH
    Inventor: Werner Auer
  • Patent number: 4472978
    Abstract: In a stabilized gyrocompass having meridian seeking gyroscopic means and slaved horizontal gryoscopic means disposed upon a common platform, a signal representative of the angle which develops between the meridian seeking gyro and the platform in response to the dynamic effects of the vehicle is generated. The generated angle is proportional to the northerly inertial velocity term and is used to control the platform in azimuth, thereby providing a dynamically correct stabilized gyrocompass without the use of accelerometers or gravity sensors which are conventional in the art.
    Type: Grant
    Filed: May 29, 1981
    Date of Patent: September 25, 1984
    Assignee: Sperry Corporation
    Inventors: Seymour Levine, Marvin Taylor
  • Patent number: 4471665
    Abstract: A gyro apparatus including a gyro case for housing a gyro therein, the spin axis of which is selected to be substantially horizontal, a container for accommodating therein the gyro case and containing a liquid within it, a first supporting device for supporting the gyro case within the container, a second supporting device for supporting the container in a manner that the container may have the freedom of three axes, and a vertical follow-up device for making the container to follow-up the gryo case around a gravity line, in which there is further provided a device in connection with the container for substantially changing the gap formed between the container containing the liquid and the gyro case from the outside of the container so as to adjust the displacement between the center of gravity of the gryo case and the center of viscous force caused by the liquid acting on the gyro case.
    Type: Grant
    Filed: February 19, 1982
    Date of Patent: September 18, 1984
    Assignee: Kabushiki Kaisha Tokyo Keiki
    Inventors: Takeshi Hojo, Shinichi Kawada
  • Patent number: 4342226
    Abstract: A turning indicator for indicating the turning direction and the turning speed of course changes of a ship or an aircraft, in which an electromotor is movably mounted between two supports of a carrier. An axle of the carrier is fixedly connected with the upper end of a leaf spring, the lower end of which is loosely guided. A measuring bridge is mounted on the leaf spring which is connected to an indicating device via an amplifier circuit. The measuring bridge can be supplied with direct current and the starting signal of the measuring bridge is also in the form of direct current which is positive or negative depending on the direction of deflection of the leaf spring, and thus indicates a measure of the turning direction, whereas the magnitude of the deflection of the leaf spring is a measure of the intensity of the starting signal and thus a measure of the turning speed.
    Type: Grant
    Filed: March 24, 1980
    Date of Patent: August 3, 1982
    Assignee: Engel & Meier oHG
    Inventors: Rudolf Engel, Horst P. Meier
  • Patent number: 4283960
    Abstract: The gyrocompass includes an improved indexing mechanism whereby the mechanical position of the gyroscope casing with respect to two orthogonal components of input rate may be measured.
    Type: Grant
    Filed: August 20, 1979
    Date of Patent: August 18, 1981
    Assignee: Sperry Corporation
    Inventor: Thomas R. Quermann
  • Patent number: 4275604
    Abstract: A gyrocompass with a tilt ring pivotable about a substantially horizontal axis has a U-frame swingable about that axis which forms part of a pendular system and carries a coupling lever engageable with projections on the lower end of the U-frame to immobilize the latter with respect to the tilt ring when the instrument is inactive, in order to hold a gyroscope axis perpendicular to the tilt-ring axis in a horizontal position. An antipendular system, comprising a liquid-filled U-tube swingable about the gyroscope axis, is overridden by the pendular system in the engaged position of the coupling lever but becomes effective upon disengagement thereof to let the gyroscope mechanism carry out necessary precession movements.
    Type: Grant
    Filed: December 28, 1978
    Date of Patent: June 30, 1981
    Inventor: Piero M. Derossi
  • Patent number: 4267737
    Abstract: A dual suspension gyroscopic device includes a gyro having at least a single degree of freedom and defining an output axis, i.e., the sensitive axis of the gyroscopic device. The gyro is supported by a gimbal which in turn is supported in a case for unlimited angular displacement about the gimbal axis. The arrangement provides low torque suspension about the sensitive axis while permitting normal angular displacement about said axis and maintaining the gyro spin axis in a reference plane. A data transferring slip ring assembly is arranged with the gimbal support and the slip ring assembly and support arrangement is powered to minimize friction about the gimbal axis.
    Type: Grant
    Filed: December 4, 1978
    Date of Patent: May 19, 1981
    Assignee: The Bendix Corporation
    Inventors: Bernard J. O'Connor, William H. Ficken, Tony R. Carnevale, Michael J. Lanni