Abstract: A process for graphically representing a simulated workpiece as processed by a numerically-controlled machine tool. Stored data defining the workpiece and the tool as well as program data defining relative movement therebetween are used to generate polygons which represent the workpiece and the tool and the path of movement of the tool. These polygons are hierarchically ordered and liked. Corresponding to the hierarchic order of the polygons, intersection point calculations in the linkage are made only for the workpiece polygons which overlap the tool polygon. The image of the processed workpiece is generated successively through the continuous superposition of the changing workpiece polygons with the processing polygons corresponding to the tool and its path. Workpiece edges which drop out are erased, and invisible workpiece edges are nto represented.
January 3, 1985
Date of Patent:
July 12, 1988
Dr. Johannes Heidenhain GmbH
Wilfried Stohr, Rudi Grimm, Elisabeth Opitz
Abstract: A vehicle is disclosed having a chassis supporting a platform having a network of criss-cross guiding rails. Trolleys circulate along these rails so as to be selectively movable towards the rear of the vehicle for the loading and unloading of road signs. The trolleys are provided with a braking device to enable them to be immobilized on the rails. The vehicle may be a trailer for the transportation of road signs, for example to indicate road works on streets and expressways.
Abstract: A tool and method for removing dents from automobile bodies or the like. An outer tool unit comprising an electromagnet having an inner face which engages the outer surface of a body panel on at least one side of the dent. The outer tool unit is rigidly mounted from an external frame or its inner face must span the dent. The electromagnet is actuated at low amperage and then an inner tool unit positioned inside the body panel against the dent's inner surface. The inner tool unit may be simply a ferrous alloy material or it may be an electromagnet itself. The electromagnet is then actuated at a higher amperage, i.e., full operating power. In either event, the inner tool unit is rocked or "ironed" on the dent's inner surface and cooperates with the outer unit to progressively and uniformly remove the dent.
Abstract: A racket sport teaching aid device comprises a frame that includes a pointing member. Unexpectedly good results are achieved when a weight is attached to the lower end of the frame. The weighted frame physically maintains the face of the racket perpendicular to the plane of the ground at both the back swing and at the ball impact point. The weighted frame serves the triple functions of stabilizing the head of the racket at the time of impacting the ball, of maintaining the head of the racket at a proper angle with respect to the ground, and of providing a directional guide to be visually observed by the player. This helps the player both to remember to maintain the racket head at impact at a proper angle with respect to the ground and actually physically assists the player in performing this task. The device also assists the player in following through on the stroke such that the follow-through is up and in the direction of the intended shot.
Abstract: A device for sighting-in firearms is disclosed. The device comprises a telescope connected to a mandrel. The mandrel is sized to fit within a variety of calibers of gun bores. The mandrel has a tapered sleeve with a conical shape which centers the outside end of the sleeve in the outside end of the firearm bore. The inside end of the sleeve has a circumferentially expandable structure which allows the sleeve to be secured in the center of the bore when flared by the head of a slideable mandrel core. The telescope is connected to the mandrel with an optical arrangement through which the line of sight of the telescope is observable. The mandrel is constructed so that when the device is inserted in the bore of a firearm, the line of sight of the telescope is centered with and parallel to the axis of the mandrel, which is also the axis of the firearm bore.
January 5, 1987
Date of Patent:
June 14, 1988
Ellsworth D. Townsend, Gerald L. Townsend
Abstract: A check valve is disclosed made with a rotationally symetrical valve body with fluid inlet and outlet holes centered on the axis of symetry. A circular, flexible diaphragm is held in place inside the valve body by a mounting pin which extends through a hole in the diaphragm. The mounting pin and an opposing mounting pin receptical are supported by legs protruding inwardly from the inlet and outlet walls of the valve body and bridging over the inlet and outlet holes. The length of the legs determine the position of the diaphragm with respect to the inlet wall against which the diaphragm seals. Thus the opening pressure of the valve is dependant on the length of the legs.
Abstract: Apparatus and method for analyzing a biological material such as blood serum to determine whether a substance indicative of disease is present. The apparatus utilizes a two-way valve construction for rinsing a cartridge containing the material under analysis at various operating stations.
October 19, 1984
Date of Patent:
June 7, 1988
Robert W. Jaekel, Donald J. Verlee, John L. Vcelka
Abstract: In general, the product of the present invention is a plastic liner bag which includes an elastic band, integral with the open top of the plastic bag. The edge of the elastic band which is attached to the plastic bag has a circumference in its relaxed state which is approximately equal to the circumference of the open top of the bag. As such, the elastic band does not interfere with the folding or rolling of the plastic liner bags of the present invention. That is, the bag will lie flat on a flat surface. The method of the present invention comprises the steps of forming a plastic bag out of plastic sheet material so as to have an open end and attaching one edge of an elastic band in its relaxed state to the plastic sheet material so as to be integral with the open end of the bag when it is formed.
Abstract: A modularized optical fiber display system is disclosed wherein each module has an optical train including a plurality of optical fibers or cables organized at one end into a bundle which is illuminated by a lamp, with each of the optical fibers of the bundle having an individual, independently controlled shuttering mechanism associated with it for controlling light flow from each optical fiber to respective lenses forming pixels in a signboard display. Each of the pixels is individually controlled to enable production of any desired alpha-numeric character or other graphic on the signboard. Each of the display modules can be separately used, or integrated into a single large display.
Abstract: A programmed conversation recording system presents a caller with a sequence of messages and records caller responses to these messages during respective calling periods. According to this invention, pauses in the caller response are automatically detected and timed and a patience interval is provided which varies in real time during the recording period as a function of the duration of the caller response. The recording period is automatically terminated when the duration of a pause in the caller response exceeds the patience interval. By varying the patience interval in real time during the recording period, the recording system can be programmed to respond properly, even to responses to complex questions.
Abstract: An electrical circuit is connected in series with a lead of an implantable heart pacemaker between the pacemaker and the heart to protect the pacemaker against high voltages and currents produced by defibrillators and other sources. The electrical circuit has a sensing resistor arranged between two normally conducting field effect transistors (FETs) all in electrical series with the pacemaker lead. When the voltage drop across the sensing resistor exceeds a predetermined positive or negative amplitude, a transistor becomes conductive and turns off the normal conduction channels of the FETs. An alternate, electrically conductive high-impedance path is switched in to limit the current flow to the pacemaker until the magnitude of the voltage across the sensing resistor drops to a safe level. The transistor then becomes non-conductive and the FETs become conductive re-establishing the normal low-impedance conduction path and effectively switching the alternate high-impedance path out of the circuit.
Abstract: The lock is preferably to be used for burglar alarms for marking articles for sale, and it comprises two members automatically interengaging when the first member is inserted into a cavity in the second member, a loose third member being positioned in said cavity. The locking effect is provided by the loose third member comprising one, optionally more inclined surfaces capable of being tangent to and sliding along a corresponding inner wall in the cavity of the second member. The cavity of the second member is pointed upwards, i.e., towards the inlet opening. A spring is provided below the loose third member, and this spring presses as a consequence of the inclined wall the third member upwards and towards the first member.
Abstract: A length- or angle-measuring arrangement for measuring the relative position of two objects. A graduation (Ta) lies in a graduation plane (TEa) of a graduation carrier (TTa) which is connected with one of the objects outside the neutral plane (NEa) of the graduation carrier (TTa). The graduation carrier (TTa) is scanned by means of a scanning graduation (ATa) in a scanning graduation plane (ATEa) of a scanning unit (Aa) which is connected with the other object. To eliminate measuring errors brought about by bendings of the graduation carrier (TTa), the scanning graduation (ATa) of the scanning unit (Aa) is arranged in the neutral plane (NEa) of the graduation carrier (TTa).
Abstract: A method and apparatus for reducing the size of the stomach cavity in humans. A collapsed balloon is packaged in water soluble material and releasably attached to a filler tube. The balloon is inserted into the cavity through the mouth and esophagus and pumped up to a desired volume through the tube after water soluble material packaging has dissolved and the balloon deployed. After stomach fluids also dissolve the releasing mechanism, the filler tube is removed from the stomach. The balloon remains in the stomach for the required dieting time. Its volume prevents the usual ingestion of food into the stomach by obese patients, causing them to feel full, and reducing the desire for food. At the end of this period a puncturing mechanism is introduced into the stomach, punctures the balloon, grasps it and the balloon is removed through the esophagus and mouth.
Abstract: A saturator of the type which includes a chamber situated between a chamber defining element and a mandrel, in which a web is moved through the chamber to impregnate the web with a saturant contained in the chamber, includes a chamber defining element which defines an array of grooves. The grooves are separated by raised surfaces. The raised surfaces cooperate with the mandrel to pressurize the saturant in a high pressure zone which causes a relatively large amount of saturant to enter the web. The grooves define respective low pressure zones, which cause a reduced amount of saturant or no saturant to impregnate the web. A desired pattern of impregnation of the web can be obtained by properly positioning the grooves with respect to the raised surfaces on the chamber defining element.
Abstract: A tubeless tire valve has a valve body and an external annular gasket having an internal through hole. The gasket, when not mounted, has a diameter partially lower than the diameter of the cylindrical portion of the valve body, on which it will be inserted, and partially larger than the latter at the coupling area with the rim. Externally, the gasket has at one end an extended lip directed towards the rim, then an intermediate zone having a larger diameter than that of the hole in the rim, and close to the intermediate zone an annular groove of reduced diameter, while a hollowed impression is provided on the valve body at the zone where the rim will be positioned.
Abstract: A monitoring unit for remotely monitoring liquid levels in a container includes a common probe, a reference probe, and four sensing probes, each mounted to the container in electrical contact with liquid within the container. A liquid level sensing unit measures resistance between the common probe and the reference probe and uses the measured resistance as a threshold to determine which of the sensing probes is in contact with liquid in the container. In this way, the sensing unit is made substantially independent of the resistivity of the liquid in the container. The sensing unit is connected to an evaluating unit by a single conductor, and the sensing unit draws a variable amount of current through the conductor in accordance with the number of sensing probes in contact with liquid in the container. The conductor thus supplies power to the sensing unit and also transmits information from the sensing unit to the evaluating unit.
Abstract: A roller cone rock bit is disclosed with an improved bearing system. The improvement comprises a main journal bearing which is substantially frustoconically shaped and a main roller cone bearing which is reverse shaped to mate with the journal bearing. The journal and roller cone bearings comprise polycrystalline diamond. The invention also includes a means for retaining the roller cone on the journal.
Abstract: A position measuring arrangement for the measurement of the relative position of two objects shiftable with respect to one another wherein the measuring graduation is connected with the first object and is scanned by a scanning unit fastened to the second object. Four binary scanning signals are produced by the scanning unit with a predefined relative phase relationship. The signals are applied to a logic network for the generation of a linked binary signal. In the case of no errors, the linked binary signal is equal to a selected one of the four binary signals. In the event of an error, the linked binary signal is not equal to the selected one of the binary signals. The linked binary signal and the selected binary signal are applied to a comparator for a determination of equality and thereby a determination of the presence of errors.
Abstract: A portable opaque projector is characterized by a transportable mode and an operable mode. When in its transportable mode, the projector has the configuration of a compact hexahedron; when in its operable mode the top and sides of the projector are opened up, and a mirror is mounted to the top.