baber/WOPTO huggingface dataset:
Patent CA-2002138-C (CA)
Inventor: YAMAMOTO SUSUMU
IPC: C21D9/02
Filed: 1989-11-02
Granted: 1999-12-14
Abstract: TITLE OF THE INVENTION    HIGH-STRENGTH COIL SPRING AND METHOD OF    PRODUCING SAME     ABSTRACT OF THE DISCLOSURE     The present invention relates to a high-strength coil spring useful for an engine and other high-strength springs requiring a high fatigue-resistance and a method of producing the same.    In general, a higher tensile strength is desired for spring materials but it has been known that if a tensile strength exceeds a certain limit, a toughness and a fatigue resistance are contrarily reduced.    In addition, a coil spring has been used after forming and then being subjected to a quenching treatment followed by being subjected to a shot peening treatment to add a compressive residual stress to a surface thereof but an effective shot peening treatment gives a surface roughness Rmax of 6 to 20 µm, so that not only it has been impossible to remove surface defects having a surface rough-ness of 6 to 20 µm or less but also impressions due to the shot peening have covered the surface defects to be turned into injured portions and fatigue nuclei in many cases.    In view of the above description, the present invention has found a high-strength coil spring with high fatigue resistance using a clean steel wire, such as chromium-vanadium steel wire and chromium-silicon steel wire, by forming it in the shape of a spring, quenching and tempering at lower temperatures to heighten the tensile strength, and being subjected to a shot peening treatment followed by being subjected to an electrolytic polishing treatment, which does not exert a bad influence on fatigue resistance, to remove surface defects and a method of producing the same.
Patent CA-2002954-C (CA)
Title: Ice machine
Inventor: QUANDT JAMES A
IPC: F25C1/22
Filed: 1989-11-14
Granted: 1993-07-20
Abstract: ABSTRACT OF THE DISCLOSURE An ice making machine of the type in which an ice mold is refrigerated and water recirculated from a water receiver over the refrigerated ice mold and back to the water receiver during an ice making cycle, to freeze ice forms on the ice mold, and the ice mold is heated and water recirculation stopped during an ice harvest cycle, to release the ice forms from the ice mold.  A temperature sensor senses when the water temperature in the receiver initially drops during an ice making cycle to about water freezing temperature and operates a water supply valve to supply additional water to the receiver to prevent the formation of ice slush in the water recirculation system. The amount of water added to the receiver during an ice making cycle is preferably controlled by volume.  The amount of water added during the ice making cycle can also be controlled by temperature of the water in the receiver or by timing the addition of water to the receiver.
Patent CA-2013538-C (CA)
Title: Optical element and optical pickup device comprising it
Inventor: YOSHIDA YOSHIO
IPC: G11B7/135
Filed: 1990-03-30
Granted: 1995-05-09
Abstract: An optical element comprises a grating having a grating  pitch  which  is  approximately  equal  to  the wavelength of an incident light, is formed on a transparent base.   The optical pickup device comprising the optical element includes a polarized light detecting unit provided with a diffraction grating having a grating pitch which is approximately equal to the wavelength of an incident light. The  diffraction  grating  is  formed  on  a  transparent substrate, and splits the incident light into two polarized lights having mutually orthogonal polarizations.  A first photodetector  is  mounted  integrally  and  virtually  in parallel with the substrate, for receiving a zeroth-order diffracted light produced by the diffraction grating, and a second photodetector is located in the same plane as the first photodetector and mounted integrally with the first photodetector and the substrate,  for receiving a first-order diffracted light produced by the diffraction grating.
Patent CA-2017267-C (CA)
Title: Clipping circuit
Inventor: ARMSTRONG STEPHEN W
IPC: H03G11/04
Filed: 1990-05-22
Granted: 1999-01-12
Abstract: The clipping circuit has a voltage reference stage and a transconductance stage connected to a voltage input. The input is connected through the transconductance stage to an output resistor. The voltage output is taken between the output resistor and the transconductance stage output. The voltage reference stage has a third current source feeding a diode connected transistor and a resistor. A second current source feeds into the resistor after the transistor. The base of the diode connected transistor is connected to the voltage input. The transconductance stage has a second transistor whose base is connected to the voltage  input,  collector  sinks  current  from  a  fourth current source and emitter feeds current to a resistor. A first current source feeds current to a third transistor and to a current mirror. The base of the third transistor is connected between the fourth current source and the collector of the second transistor.  The current mirror draws current from the output resistor and feeds current to between the emitter  of  the  second transistor  and  its associated  resistor.  The  transconductance  stage  also includes a feed back loop such that a change in the first and second current sources creates a steady-state current drawn through the resistor that is one-half of the first current source current. The circuit produces symmetrical clipping of an input voltage signal at the voltage output.
Patent CA-2020388-C (CA)
Inventor: BARDWELL ALLEN E
IPC: E21B4/08
Filed: 1990-07-04
Granted: 1995-09-05
Abstract: A multiple blow percussion drill assembly (10) is specially configured to provide significantly increased maintainability and adjustability in the field, thereby greatly extending its service life and usefulness over a wide variety of drilling conditions.  Both spring (50) replacement and impact hammer (34) delay time variations are rapidly accomplished by virtue of unique positioning and interactions of the internal components, without the need for dissassembly of the sealed high impact energy portion of the drill assembly.  Advantageously, a first chamber (18) housing the high impact energy transferring components is isolated from a second chamber (22) housing the control components, such that the control components may be rapidly cleaned, adjusted, or replaced via a simple access port.
Patent CA-2023356-C (CA)
Title: Printing apparatus, and facsimile apparatus using the same
Inventor: SHIMONAGA SADAAKI
IPC: H04N1/40
Filed: 1990-08-15
Granted: 1994-11-01
Abstract: A printing apparatus prints image on thermosensible paper by means of thermosensible elements (H1 to Hn).          When printing data is supplied from a central processing circuit (28) to a printing data correcting circuit (52), the printing data correcting circuit performs signal processing referring to printing data supplied in response to shifting operation of a shift register (S).  The printing data is latched in a latch circuit (53) for each printing operation and the latched printing data is stored in the shift register and supplied to the thermosensible elements, whereby the printing data is printed on the thermosensible paper driven by a pulse motor (57).
Patent CA-2028500-C (CA)
Title: Environmentally sealed pedestal
Inventor: JAYCOX DONALD F
IPC: G12B9/02
Filed: 1990-10-24
Granted: 2001-05-15
Abstract: A reenterable protective housing for protecting telecommunications equipment from detrimental environmental effects contains a reenterable splice enclosure. The protective housing includes a base portion, a bulkhead member, a dome member selectively attachable to the bulkhead member and a sealing assembly for selectively sealing the dome member to the bulkhead member. The dome is selectively reenterable for access to the contents thereof while maintaining the splice enclosure in a sealed condition. The splice enclosure is selectively engageable with the bulkhead member for providing reenterable access to splice connections retained therein.
Patent CA-2039177-C (CA)
Title: Fusion pipe joining system and method
Inventor: TAYLOR JAMES M
IPC: B29C65/18
Filed: 1990-12-10
Granted: 1997-03-18
Abstract: In a plastic pipe joining system a plastic sleeve 6 is provided to extend on both sides beyond the region of contact or closest approach to one another of pipes (2 and 4) to be joined with the sleeve being fused to both pipes, the sleeve heated to Curie temperature of high mu material excited by an externally generated high frequency magnetic field.  The heaters (16 and 18)  may be embedded in the sleeve (6) and the sleeve may also be employed with end caps (12 and 14) that extended over the sleeve, the end caps and sleeve being fused to one another and the pipes by heaters carried by the end caps or the sleeve.  An external heater may also be employed which in conjunction with shaped end members provides the sleeve with beveled or tapered edges to enhance the ability of the sleeve to withstand cracking.
Patent CA-2039549-C (CA)
Title: Flexible robotic links and manipulator trunks made therefrom
Inventor: BUBIC FRANK R
IPC: B25J18/06
Filed: 1991-04-02
Granted: 1996-04-30
Abstract: Single or multiple flexible robotic manipulator trunks can be made from individually activated,  three degree-of-freedom, flexible robotic links.  Threedimensional positioning and orientation of the distal end of each link is achieved exclusively by elastic deformation of the flexible link assembly without revolute or prismatic joints. The activating bending and torsional moments required for such a positioning are generated by the antagonistic action of  a plurality of prestressed,  inflatable,  laterally bendable and axially extensible tubular actuators with the anisotropic,  circumferentially reinforced walls.   The positioning motion, working forces and manipulator arm stiffness are all controlled by asynchronously modulated pulse streams which regulate the distribution of energy from a common source of fluid under constant pressure.
Patent CA-2039909-C (CA)
Title: Substituted 3-thia- and 3-oxa-alkylflavones, a process for their preparation, the use thereof, medicaments based on these compounds and intermediates
Inventor: BECK GERHARD
IPC: A61P31/00
Filed: 1991-04-05
Granted: 2002-04-02
Abstract: Substituted 3-thia- and 3-oxa-alkylflavones of formula I (see formula I) wherein R, R1, R2, R3, R4, X, m and n have the indicated meanings, a process for the preparation of these com-pounds and their use as medicaments and pharmaceutical preparations are described. In addition, new inter-mediates for the preparation of the compounds of formula I are described.
Patent CA-2039991-C (CA)
Title: Valve and pipe coupling assembly
Inventor: HORTON RICHARD
IPC: F16L29/00
Filed: 1991-04-08
Granted: 1999-09-07
Abstract: An annular shoulder on a valve body is clamped,between opposite end portions of adjacent pipes locked together by a single clamp. Sealing is provided by O-rings positioned on the valve body on opposite sides of the annular shoulder between the valve body and the pipe sections.
Patent CA-2041974-C (CA)
Title: Cosmetic composition
Inventor: NICOLL GREGG A
IPC: A61K/
Filed: 1991-05-06
Granted: 1995-04-18
Abstract: A composition for topical application to human skin to provide protection from excessive exposure to ultra-violet rays, comprises:   a.   an effective amount of ultrafine titanium dioxide as an inorganic sunscreen;   b.   an effective amount of octyl methoxycinnamate as an organic sunscreen;  and c.  a cosmetically acceptable vehicle for the sunscreens;   the weight concentration of the titanium dioxide and octyl methoxycinnamate being within the region designated A in the accompaning drawing.
Patent CA-2042253-C (CA)
Title: Method of making a transformer core comprising strips of amorphous steel wrapped around the core window
Inventor: KLAPPERT WILLI
IPC: H01F27/24
Filed: 1991-05-09
Granted: 2000-08-15
Abstract: Groups of amorphous steel strips, cut to appropriate length from a composite strip, are stacked in longitudinally-staggered relationship to form packets. The groups are made up by a process that comprises a pre-spooling operation that results in the strips and groups in each packet adhering together, even though dry. The individual packets are fed successively into a belt nester that includes a rotatable arbor and wrapping means that wraps the packets in superposed relationship about the arbor as the arbor rotates, thereby building up a hollow core form. The above-described adhesive effect precludes the strips and groups from shifting longitudinally while the packets are being wrapped about the arbor.
Patent CA-2046581-C (CA)
Title: Discharge tube for series gap ignition apparatus
Inventor: YAGI KIYOSHI
IPC: H01J17/04
Filed: 1991-07-09
Granted: 1993-12-14
Abstract: ABSTRACT OF THE DISCLOSURE      The discharge tube has an insulating tube formed into a hollow cylinder with one end open and the other closed.  An anode electrode, which is formed as a flanged electrode, is hermetically fitted to the open end of the insulating tube and a cathode electrode, which is formed as a bar electrode, is embedded in the closed end of the insulating tube so that only the front end surface of the bar electrode faces the interior of the insulating tube.          This construction allows no redundant space within the insulating tube other than the discharge space, so that the discharge tube can be minimized in size.  This construction also permits a discharge only between the front end of the bar electrode and the inner end of the flanged electrode, stabilizing the electron emission passage or discharge path and therefore the discharge voltage.
Patent CA-2047688-C (CA)
Inventor: SUICHI ISAO
IPC: B22D11/06
Filed: 1991-01-11
Granted: 1996-11-19
Abstract: A tortoise shell pattern having a circle equivalent diameter of 5 to 200 µm surrounded by a dimple having a depth in the range of from 5 to 30 µm is formed on the surface of a thin continuous cast plate for the purpose of preventing the occurrence of surface cracking of the cast plate. The tortoise shell pattern is formed by conducting casting while regulating the overheating temperature, .DELTA.T, of a molten metal in a pouring basin of a movable casting mold type continuous casting machine at 15°C or below.
Patent CA-2062264-C (CA)
Title: Static dissipative resin composition
Inventor: OKU MITSUMASA
IPC: C08K3/00
Filed: 1992-03-04
Granted: 1997-01-14
Abstract: A static dissipative resin composition has semiconductor fillers dispersed in the resin with at least some of the fillers in electrical contact with each other to form a conductive path.  The .alpha. value representing the degree of nonlinearity of the V-i characteristic at the contact between the semiconductor fillers should be 2-150, and the volume resistivity of the semiconductor filler is desirably 105-1010.OMEGA..cm, whereby, by employment of a conductive filler or a solid lubricant together with the semiconductor filler, various physical properties of the resin composition are improved.
Patent CA-2062453-C (CA)
Inventor: KATO NOBUO
IPC: C07B59/00
Filed: 1992-03-06
Granted: 1996-02-13
Abstract: A process for preparing a 13C-labelled compound which comprises reacting an alcohol 13C-labelled carbon source compound and a substrate in the presence of an enzyme system consisting of oxidase belonging to EC1 group and capable of converting the alcohol 13C-labelled carbon source compound to an aldehyde 13C-labelled carbon source compound, lyase belonging to EC4 group and capable of synthesizing a carbon-carbon bond and at least one of isomerases belonging to EC5 group and capable of isomerizing substrates to obtain a 13C-labelled compound specifically labelled with 13C in a specific carbon position.
Patent CA-2066280-C (CA)
Title: Image pickup system with a image pickup device for control
Inventor: HIRAMATSU MASARU
IPC: H04N5/243
Filed: 1992-04-16
Granted: 1997-12-09
Abstract: An image pickup system mounted on a craft flying an orbit above an object zone and sequentially picking up the images of unit areas defined by the swath width of the object zone and a distance in the direction of orbit.  The system has a main image pickup device and a control image pickup device for picking up the image of an area ahead of the visual field of the main pickup device, i.e., a forward area preceding the unit area.  While the craft flies along the orbit, the control image pickup device detects the radiance distribution of the forward area to thereby control, for example, the sensitivity of the main image pickup device.          To detect the radiance distribution, a data processing section included in the control pickup device converts data picked up in the forward area to an image to allow the image to be compared with predetermined reference values.
Patent CA-2069771-C (CA)
Title: Apparatus and method for processing scrap film
Inventor: BUCK RAY A
IPC: B02C23/26
Filed: 1992-05-28
Granted: 1996-04-16
Abstract: An economical apparatus and method for reprocessing scrap film.  The apparatus includes a film-air separation chamber for separating air from incoming strips of scrap film, a cutter for cutting the strips into fine pieces, and a storage tank or further reprocessing means to which the cut pieces of scrap film are conveyed.  A air bypass line having a computer-controlled valve conveys air directly from the film-air separation chamber to the cutter outlet when the valve is in an open position, and causes all of the air to flow into the cutter inlet when the valve is in a closed position.  The open or closed position of the air bypass valve depends upon the cutter motor power, which varies as the volume of scrap film in the cutter varies. Due to the inclusion of the accurately controlled air bypass valve, only a single fan is needed to convey the film into and out of both the film-air separation chamber and the cutter.
Patent CA-2076696-C (CA)
Inventor: BAADER JOSEPH E
IPC: B60Q3/51
Filed: 1992-08-24
Granted: 1995-08-15
Abstract: A dome light housing of the type adapted for fitting within a school bus interior. The housing includes a base defining a well having an enclosed bottom,an enclosed end and an end with aperture, together with an open top. A peripheral ledge and support surface extends around the top of the well, as a seat for a covering lens. A seat for a plug insert is defined at the open end of the well. A covering lens is removably supported upon the support surface within the peripheral ledge and a plug insert is fitted within the end with aperture, so as to support an illuminating bulb and wiring assembly within the well and adjacent the covering lens.
Patent CA-2077089-C (CA)
Title: Intracranial pressure monitoring system
Inventor: BECKMAN RONALD B
IPC: A61B5/0215
Filed: 1991-02-12
Granted: 2001-08-14
Abstract: A catheter assembly (20) for measuring a fluid pressure in a body cavity includes an optical converter (39) responsive to an electrical power source for energizing a light-emitting diode (45) which has drift characteristics which vary in response to temperature. An optical sensor (22) is adapted to receive the light from the light-emitting diode (45) and to provide a measurement signal indicative of the fluid pressure in the cavity. This measurement signal has undesirable characteristics related to the thermal drift characteristics of the diode. A detection circuit (55) detects the measurement signal and provides an output signal indicative of fluid pressure in the cavity. A special filter (63) is included in this detection circuit (55) which has optical characteristics that substantially offset the undesirable characteristics of the measurement signal, so that the output signal is substantially independent of the temperature of the diode. A power conversion circuit (36) enables the assembly to be energized by an excitation voltage which is provided in several different forms by various monitors.
Patent CA-2081169-C (CA)
Title: Telecommunication switching system having adaptive routing switching nodes
Inventor: BALES BRUCE MERRILL
IPC: H04M3/00
Filed: 1992-10-22
Granted: 1997-04-22
Abstract: A telecommunication switching system having switching nodes that perform adaptive routing by utilizing the fact that the switching nodes are arranged in a first and a second hierarchy. In addition, each switching node maintains routing information based on telephone and switching node numbers which identify the switching nodes. A destination switching node transfers its routing information back to an originating switching node which combines that routing information with its own in order to determine shorter call paths for subsequent call routing. The first hierarchy is a dialing plan hierarchy having groups of switching nodes at each dialing plan level. The second hierarchy is a switching node hierarchy based on the switching node number of each switching node with at least one switching node ofthe switching node hierarchy being at a different level in the dialing plan hierarchy. In order to route a call, a switching node first routes through levels of switching nodes in the dialing plan hierarchy until a second switching node is encounteredwhich can determine the identification of the destination switching node based on a dialed telephone number. The second switching node then routes the call through the node hierarchy using the identified node number until a path is determined to the destination switching node.
Patent CA-2093747-C (CA)
Title: Process for converting dimethyl ether to ethylidene diacetate
Inventor: WALLER FRANCIS J
IPC: C07C29/151
Filed: 1993-04-08
Granted: 1999-06-15
Abstract: A process for producing ethylidene diacetate (EDDA) is disclosed wherein dimethyl ether is hydrocarbonylated in the presence of a newly discovered catalyst system.  The process comprises reacting dimethyl ether, hydrogen, carbon monoxide and acetic acid in the presence of a catalyst system comprising a Group VIII metal, methyl iodide, lithium iodide and optionally, lithium acetate, under conditions sufficient to form EDDA and recovering the EDDA from the reaction mixture.  The process is highly selective toward producing EDDA.
Patent CA-2094013-C (CA)
Title: Corrosion condition evaluation and corrosion protection of unbonded post-tension cables in concrete structures
Inventor: VANDER VELDE HENRY
IPC: G01N17/00
Filed: 1993-04-14
Granted: 1997-01-14
Abstract: There is disclosed a method and apparatus for the corrosion condition evaluation of unbonded prestressing elements in post-tension concrete structures.  The method involves locating a prestressing element in the structure and providing at least two openings in the structure at positions along the length of the element.  One of the openings is an inlet port and the other is an outlet port, each of the ports permitting communication with the gaseous environment within a conduit surrounding the prestressing element.  The gaseous environment is accessed through the outlet port by extracting a sample of gas therethrough.  The sample is then measured to determine its humidity and thereby evaluate the corrosion condition of the prestressing element between the inlet port and the outlet port.  A method and apparatus is also provided for the on-site corrosion protection of unbonded prestressing elements whereby the gaseous environments within the conduits are cyclically pressurized with a dry gas.  The protection method may also include programmable control of the dry gas pressurization and feedback of the humidity levels in the conduits for adjusting the parameters of cyclical pressurization so as to maintain a predetermined maximum humidity value in the gaseous environments associated with the prestressing elements of the structure.