Output Bias Or Resistance Device Patents (Class 310/97)
  • Patent number: 7999426
    Abstract: The present disclosure provides a motor overload protection device that includes a driving gear, a loading wheel, and at least one protecting gear unit rotatably fixed to the loading wheel. The loading wheel defines a central through hole for rotatably receiving a rotor of a motor. The driving gear is fixed on the rotor. The at least one protecting gear unit is rotated by the rotor. A resistance between the at least one protecting gear unit and the loading wheel is predetermined. When the load on the loading wheel is less than or equal to the maximum load of the motor, the resistance keeps the loading wheel and the at least one protecting gear unit together rotating around the rotor of the motor. When the load is greater than the maximum load of the motor, the at least one protecting gear unit rotates relative to the loading wheel.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: August 16, 2011
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventor: Xiao-Guang Su
  • Patent number: 6641476
    Abstract: A coin (or banknote) dispenser has a plurality of cash stores, a common actuator and a clutch for each store selectively transmitting a driving force to cause dispensing of a currency unit. The clutch has a driving member which is driven by the actuator, a driven member which can move to cause a currency unit to be dispensed from the cash store, a coupling member which can cause a driving force to be transmitted from the driving member to the driven member depending upon whether the coupling member is in an engaged state or a disengaged state, and an electromagnet for moving the coupling member from one of the states to the other state.
    Type: Grant
    Filed: December 28, 2001
    Date of Patent: November 4, 2003
    Inventor: Colin Richard French
  • Patent number: 6011340
    Abstract: A dynamo-electric core which has a lamination stack defining an axial bore therethrough is wrapped by a wire coil having a coil lead. A mounting member is axially movable within said axial bore between a first position and a second position. A coil lead anchoring structure is positioned adjacent an end portion of said mounting member and is axially movable with said mounting member. When the mounting member is in the first position, there is adequate space for winding apparatus and fusing apparatus for placing and securing the coil lead to the coil lead anchoring structure. When the mounting member is in the second position, the axial length of the dynamo-electric core is reduced.
    Type: Grant
    Filed: March 26, 1999
    Date of Patent: January 4, 2000
    Assignee: Axis USA, Inc.
    Inventor: Walter Bonura
  • Patent number: 5777411
    Abstract: A geared electric motor 1 used for power window apparatuses, for example, which is provided with an mature 7 having an armature shaft 7a, an output shaft 8 connected with the armature shaft 7a through a worm gear pair (7a7 and 17) and two friction plates 9 and 10 to be in contact with both end faces of the armature shaft 7a. The armature shaft 7a of this motor 1 is prevented from rotation by frictional resistance generating between the friction plates 9, 10 and the armature shaft 7a even if the output shaft 8 is applied with rotatory force.
    Type: Grant
    Filed: February 29, 1996
    Date of Patent: July 7, 1998
    Assignee: Jidosha Denki Kogyo Kabushiki Kaisha
    Inventors: Fumio Nakajima, Takeo Furuya, Sumio Furukawa, Toshihiro Negishi
  • Patent number: 5386165
    Abstract: In order to be able to completely eliminate the axial play of an armature spindle of an electric motor, especially for a windshield wiping system of a motor vehicle, even though conditions change over time, a prestressing member acted upon by a spring leg continuously presses against the end of the armature spindle. The prestressing member does not necessarily have to abut directly on the end of the armature spindle, but rather a cap is inserted onto the end of the armature spindle and non-rotatably fixed to the motor housing or a gear housing. An eccentric formed as the housing of the prestressing member abuts on the outside of the bottom of the cap. In an alternative embodiment, a mushroom shaped prestressing member having a mushroom head presses against the end of the armature spindle.
    Type: Grant
    Filed: March 18, 1993
    Date of Patent: January 31, 1995
    Assignee: SWF Auto-Electric GmbH
    Inventors: Rainer Bruhn, Bernd Walther
  • Patent number: 5205534
    Abstract: A zone valve for a hydronic system (either heating or cooling) in which a motor-driven actuator rotates a ball valve through approximately 90.degree., between closed and opened positions. The ball valve provides lower flow resistance than that of conventional heat-motor and motorized zone valves, allowing the use of lower rated pumps, and allowing a single size valve to serve most applications. A restoring torque is provided by a tension spring so configured that it provides sufficient restoring torque to overcome the frictional torque of the ball valve. The restoring torque is kept from building up during rotation by configuring the spring in such a manner that its force varies inversely with the effective moment arm. The restoring torque varies by no more than 20% (preferably no more than 10%) during rotation of the ball valve.
    Type: Grant
    Filed: September 27, 1991
    Date of Patent: April 27, 1993
    Assignee: Taco, Inc.
    Inventor: Attilio G. Giordani
  • Patent number: 4035674
    Abstract: Quartz crystal vibrators of small size which vibrate in the shear mode consist essentially of a vibrating portion and a support portion, both of which lie in the same plane. As a consequence, they are readily manufactured on a production basis and can be shaped so as to minimize the effect of variation in ambient temperature.
    Type: Grant
    Filed: November 7, 1975
    Date of Patent: July 12, 1977
    Assignee: Kabushiki Kaisha Suwa Seikosha
    Inventors: Kikuo Oguchi, Ogata Toshiaki, Eishi Momosaki
  • Patent number: 4025954
    Abstract: A device which converts the spatial distribution of the received light energy into a modulation of an electric signal. It comprises: a non-piezoelectric substrate; an electro-mechanical transducer in the form of interleaved comb shaped electrodes deposited on the substrate and covered by a piezoelectric layer, and a photoconductive layer covering the piezoelectric layer. The image is projected on to the photoconductive layer and, when the transducer is short-circuited, an elastic wave modulated by the image is propagated in the substrate towards an output transducer which delivers the electric reading signal.
    Type: Grant
    Filed: March 21, 1975
    Date of Patent: May 24, 1977
    Assignee: Thomson-CSF
    Inventor: Alain Bert
  • Patent number: 4016515
    Abstract: A bulk wave acoustic wave device with electrodes fabricated on a crystal in the form of arrays each having a plurality of closely spaced electrodes, one array being angularly disposed with respect to the other to provide at least one pair of matching electrodes notwithstanding uncontrolled beam wander within the crystal.
    Type: Grant
    Filed: December 31, 1975
    Date of Patent: April 5, 1977
    Assignee: Hughes Aircraft Company
    Inventor: Michael T. Wauk, II
  • Patent number: 4005376
    Abstract: An electrically variable surface acoustic wave phase shifter including a strate upon which a piezoelectric layer is deposited and separated therefrom by an insulating layer. An electrode is deposited on the piezoelectric layer and on the bottom of the substrate with an electrical dc bias applied onto the electrodes which causes a charge accumulation or a depletion region at the silicon surface. This charge accumulation or depletion region causes the boundary conditions to change therefore causing a phase change in an acoustical wave propagating along the layered silicon surface.
    Type: Grant
    Filed: April 15, 1976
    Date of Patent: January 25, 1977
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Kenneth L. Davis
  • Patent number: 3992694
    Abstract: A transducer composed of a plurality of transducer segments arranged along a line with electrodes positioned between the segments and a pair of end electrodes positioned at opposite ends of the line of transducer segments. The two end electrodes are electrically coupled. Alternate ones of the remaining electrodes are coupled to the terminal pair of a signal generator which electrically activates the transducer segments to convert the electrical signals to vibrational energy for the radiation of sonic energy from the transducer. This arrangement reduces the electrical potential between the electrodes and a metallic case which encloses the transducer.
    Type: Grant
    Filed: February 20, 1975
    Date of Patent: November 16, 1976
    Assignee: Raytheon Company
    Inventor: Stanley L. Ehrlich
  • Patent number: 3989965
    Abstract: An ultrasonic transducer specifically suited to high temperature sodium applications is described. A piezoelectric active element is joined to the transducer faceplate by coating the faceplate and juxtaposed active element face with wetting agents specifically compatible with the bonding procedure employed to achieve the joint. The opposite face of the active element is fitted with a backing member designed to assure continued electrical continuity during adverse operating conditions which can result in the fracturing of the active element. The fit is achieved employing a spring-loaded electrode operably arranged to electrically couple the internal transducer components, enclosed in a hermetically sealed housing, to accessory components normally employed in transducer applications.Two alternative backing members are taught for assuring electrical continuity. The first employs a resilient, discrete multipoint contact electrode in electrical communication with the active element face.
    Type: Grant
    Filed: July 27, 1973
    Date of Patent: November 2, 1976
    Assignee: Westinghouse Electric Corporation
    Inventors: Richard W. Smith, Gerald E. Adamson
  • Patent number: 3984791
    Abstract: An acoustic surface wave filter which includes a strip member of a piezoelectric material having input and output interdigital transducers formed on a major surface thereof, each of the interdigital transducers including two interlaced rows of parallel spaced-apart elongated members, each of the elongated members of at least one of the rows being bifurcated to provide two parallel limbs, the limbs of each of the bifurcated members being connected together by means of at least one connecting link.
    Type: Grant
    Filed: June 24, 1975
    Date of Patent: October 5, 1976
    Assignee: Plessey Handel und Investments A.G.
    Inventor: John Maxwell Deacon
  • Patent number: 3977328
    Abstract: A detonator operated by signals derived from a piezoelectric transducer element when subjected to mechanical pressure wherein the piezoelectric transducer element has a resistivity of less than about 5 .times. 10 inches .OMEGA.cm.
    Type: Grant
    Filed: October 1, 1973
    Date of Patent: August 31, 1976
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Kenneth Raymond Brown, Rodney Lane, Douglas Reginald Luff
  • Patent number: 3978436
    Abstract: A piezoelectric body has a transducer on one surface. The transducer includes an electrically insulating body on the piezoelectric body; the electrically insulating body has a surface relief pattern on a surface which is opposite the piezoelectric body. An electrically conductive layer is on the electrically insulating body on the surface having the relief pattern thereon.The transducer can be formed by means of a master body. A surface of the master body, having a relief pattern thereon, is pressed against the electrically insulating body to form a relief pattern on the electrically insulating body. The electrically conductive layer is then formed on the electrically insulating body on the surface having the relief pattern thereon.
    Type: Grant
    Filed: November 10, 1975
    Date of Patent: August 31, 1976
    Assignee: RCA Corporation
    Inventors: Roger Casanova Alig, Lubomyr Stephen Onyshkevych
  • Patent number: 3969641
    Abstract: A flexural mode quartz crystal vibrator formed from a quartz crystal plate having first and second opposed substantially planar surfaces, with a plurality of electrodes on at least one side thereof, is provided. The vibrator is characterized by the placement of electrodes on at least one of the opposed surfaces of the quartz crystal plate, the placement of the electrodes providing a vibrator having a thickness of 0.5 mm or less.
    Type: Grant
    Filed: April 16, 1974
    Date of Patent: July 13, 1976
    Assignee: Kabushiki Kaisha Suwa Seikosha
    Inventors: Kikuo Oguchi, Akio Shimoi, Toshiaki Ogata
  • Patent number: 3961210
    Abstract: A piezoelectric device comprisng a thin plate of a piezoelectric material which has a Poisson's ratio of less than one-third, and has an electrode region and a non-electrode region, wherein the thickness relation between the electode region and the non-electrode region is arranged so that the thickness of the electrode region is smaller than the thickness of the non-electrode region when a value of equations represented by (.pi.p/4)+(4/k.sup.3)cot(.pi.kp/2) Q for the thickness-extensional mode, and (.pi.q/4)+(4/k)cot(.pi. q/2k) Q for the thickness-shear mode is negative respectively for a desired vibratory mode, and that the thickness of the electrode region is larger than the thickness of the non-electrode region when the value of the above equations are positive respectively for a desired thickness vibration mode.
    Type: Grant
    Filed: December 2, 1974
    Date of Patent: June 1, 1976
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takashi Nagata, Raymond David Mindlin
  • Patent number: 3959747
    Abstract: A body of lithium niobate coated with a first thin layer of magnesium and a second conductive metal layer on the magnesium layer permits subsequent ultrasonic bonding of a wire to the second layer without problems of delamination.
    Type: Grant
    Filed: April 30, 1975
    Date of Patent: May 25, 1976
    Assignee: RCA Corporation
    Inventors: Zygmond Turski, John Louis Vossen, Jr.
  • Patent number: 3948089
    Abstract: A specimen or in-service structural member in which strain is to be measured is fabricated as a unit which generates a signal in response to strain occurring in a given region of its surface. A film of piezoelectric material is deposited upon the surface in a manner providing a strong molecular bond between the specimen or member and the piezoelectric film. The film material is chosen from the class having a 6 mm type crystal lattice structure and is formed as a crystalline deposit with the c-axis perpendicular to the surface of the specimen or member. An arrangement of electrodes is provided for direct electrical coupling between spatially separated portions of the piezoelectric film. The electrodes form an output coupling for an electrical signal generated by the piezoelectrically active properties of the piezoelectric film in response to strain mechanically coupled from the substrate surface to the piezoelectric film through the molecular bond.
    Type: Grant
    Filed: October 12, 1973
    Date of Patent: April 6, 1976
    Assignee: Westinghouse Electric Corporation
    Inventors: Bevil J. Shaw, John DEKlerk
  • Patent number: 3944862
    Abstract: A flexural mode quartz crystal vibrator formed from a quartz crystal plate having first and second opposed substantially planar surfaces, with a plurality of electrodes on both said surfaces is provided. The vibrator is characterized by the placement of electrodes on both of the opposed surfaces so that the electrodes on each surface do not overlap each other.
    Type: Grant
    Filed: May 2, 1974
    Date of Patent: March 16, 1976
    Assignee: Kabushiki Kaisha Suwa Seikosha
    Inventors: Akio Shimoi, Kikuo Oguchi, Toshiaki Ogata
  • Patent number: 3943389
    Abstract: A surface acoustic wave (SAW) structure is disclosed wherein a SAW device is incorporated as an exterior lamina within a composite laminate in order to temperature stabilize the acoustic device. The composite laminate is synthesized to selectively mismatch the thermal expansion characteristics of the piezoelectric material, which is the body of the acoustic device, along the axis of acoustic propagation and simultaneously approximately match the thermal expansion properties along the orthogonal axis. Compressive force is thereby applied to the acoustic device to keep the substrate length constant and thus provide an approximately zero temperature coefficient over a preferred range of temperatures.
    Type: Grant
    Filed: July 2, 1974
    Date of Patent: March 9, 1976
    Assignee: Motorola, Inc.
    Inventors: Fred S. Hickernell, Larry A. Moore
  • Patent number: 3942139
    Abstract: A thin film piezoelectric transducer generates bulk mode ultrasonic elastic waves which propagate into a transmission medium, such as silicon. The wave is reflected back towards the first transducer by a reflecting surface. A second transducer is located adjacent to the first transducer and receives the acoustic wave from the reflected surface. The path length of the ultrasonic wave from the first transducer to the second transducer is long enough to enable the bulk wave to be in the Fraunhofer field. An acoustic absorbing material, such as indium, may be placed on the reflecting surface and on the surface containing the two transducers in selective areas to reduce undesired reflections. The structure is suitable for use in the microwave region wherein the insertion loss may be relatively constant over a given frequency band.
    Type: Grant
    Filed: November 8, 1974
    Date of Patent: March 2, 1976
    Assignee: Westinghouse Electric Corporation
    Inventors: Herbert Warren Cooper, John DEKlerk
  • Patent number: 3940638
    Abstract: A thin quartz oscillator element including a substrate of quartz with a plurality of electrodes disposed on a major surface of the substrate and extending outwardly beyond one edge of the substrate. Metallic bodies are disposed on the same surface of the substrate as the electrodes remote from the electrodes. The electrodes thicken in the region that extends beyond the edge of the substrate to a sufficient thickness to be thereby reinforced. Another electrode made as a metallic layer is built-up on the opposite major surface of the quartz substrate. To construct the quartz oscillator, an upper and a lower major surface of a quartz substrate are lapped. The substrate is mounted on a jig, and a metallic layer is deposited on a surface of the substrate and extending from one end thereof. The metallic layer is coated with photo-resist, the photo-resist is exposed to light through a mask, and the photoresist is then developed to remove unexposed photo-resist.
    Type: Grant
    Filed: September 4, 1973
    Date of Patent: February 24, 1976
    Inventor: Toshio Terayama