2405 results about "Right triangle" patented technology

A cutting saw blade for use with an oscillatory power tool used in surgical bone cutting procedures including a blade having a distal end provided with teeth whose tips are located on a tangent line perpendicular to the long axis of the blade. The teeth are configured substantially as right triangles with their hypotenuses facing either towards the center of the blade or away from the center of the blade. A central tooth can be optionally provided.

A pouch of the present invention comprises a front and a rear walls and a narrow pouring portion, and at least one wall portion is partially protruded to an outward direction of the pouch to be provided with a bulge portion having a hollow structure at vicinity of the pouring portion. Alternatively, a cut line of the pouring portion is positioned based on a vertex of a vertical angle of an assumed right triangle which is drawn at the pouring portion by the predetermined regulations. A half-cut line as an opening aid may be provided to a position to be opened of the pouch, the half-cut line being formed so as to have a combination of a deep part and a shallow part and/or a combination of a wide part and a narrow part. The bulge portion may be formed by subjecting a preheated resin film to press molding with the use of a die comprising a cavity and a core, and then cooling the thus press-molded resin film while it is held in the die.

The invention relates to a free 6-UPS three-linkage parallel robot, belonging to the robot and mechanical producing area. The invention is characterized in that: three couples of straight driving branches are arranged in symmetry right triangle between the upper platform (1) and the base (2), while each couple comprises: two same SPU synchronous flexible driving branch while the upper end of each branch has a ball couple, the middle has a moving couple and the lower end has a universal couple connected to the base (2); the moving couple is formed by a mechanical or hydraulic synchronous flexible driver; the distance between two ball couples of each couple of straight driving branch is the same as the distance between two universal couple vertical axles (9). The invention is characterized in less freedom, easy control, large working space, simple structure and high accuracy. The invention can be used in large radio telescope, three-dimensional measure and sensor, etc.

A method and apparatus for producing with a gas discharge laser an output laser beam comprising output laser light pulses, for delivery as a light source to a utilizing tool is disclosed which may comprise a beam path and a beam homogenizer in the beam path. The beam homogenizer may comprise at least one beam image inverter or spatial rotator, which may comprise a spatial coherency cell position shifter. The homogenizer may comprise a delay path which is longer than, but approximately the same delay as the temporal coherence length of the source beam. The homogenizer may comprise a pair of conjoined dove prisms having a partially reflective coating at the conjoined surfaces of each, a right triangle prism comprising a hypotenuse face facing the source beam and fully reflective adjoining side faces or an isosceles triangle prism having a face facing the source beam and fully reflective adjoining side faces or combinations of these, which may serve as a source beam multiple alternating inverted image creating mechanism. The beam path may be part of a bandwidth measuring the bandwidths of an output laser beam comprising output laser light in the range of below 500 femtometers at accuracies within tens of femtometers. The homogenizer may comprise a rotating diffuser which may be a ground glass diffuser which may also be etched. The wavemeter may also comprise a collimator in the beam path collimating the diffused light; a confocal etalon creating an output based upon the collimated light entering the confocal etalon; and a detector detecting the output of the confocal etalon and may also comprise a scanning mechanism scanning the angle of incidence of the collimated light entering the confocal etalon which may scan the collimated light across the confocal etalon or scan the etalon across the collimated light, and may comprise an acousto-optical scanner. The confocal etalon may have a free spectral range approximately equal to the E95 width of the beam being measured. The detector may comprise a photomultiplier detecting an intensity pattern of the output of the confocal etalon.

The invention provides real-time automatically leveled table and chair. The panel of the table and chair is supported by a central supporting column and two hydraulic cylinders, and the three supporting points are distributed in an isosceles right triangle shape; a two-dimensional tilt sensor is arranged in the center of the panel to provide two-dimensional tilt angles of a workbench plane relative to the horizontal plane in real time, including x-axial signals with symbols and y-axial signals; and PLC acquires a tilt error according to the signals from the two-dimensional tilt sensor and sends proportional analog control signals in real time, controls positive rotation, negative rotation and rotating speed of a servo motor after the PLC is adjusted by a motor driver, and drives two hydraulic cylinders for leveling to make telescopic actions respectively by driving a composite bidirectional gear pump so as to maintain the horizontal state of the panel of the table and chair. If a substrate is constantly in a moving state, the device acquires tilt signals in real time and constantly repeats the leveling process to play a role in real-time leveling. The table and chair is particularly suitable for application in sea wave shaking environment.

The invention relates to the technical field of optical communication and discloses an optical grating coupler and an optical signal coupling method. The optical grating coupler comprises a top silicon layer, a base silicon layer and a silicon dioxide layer, wherein the silicon dioxide layer is arranged on the upper surface of the base silicon layer, the top silicon layer is disposed on the upper surface of the silicon dioxide layer, the top silicon layer is of a structure formed by ranking at least two right triangles in the direction perpendicular to the light transmission direction, and received optical fibers face toward the rank structure of the right triangles. According to the optical grating coupler and the optical signal coupling method, through application of triangular optical gratings, work bandwidth of the optical grating coupler is increased, and applicability of the optical grating coupler is improved; besides, simulating calculation is performed through a three-dimensional time domain finite difference method so that TE and TM light coupling efficiencies are the same, optical grating structural parameters are determined, polarization insensitivity is achieved; the optical grating coupler has the advantages of being simple in structure, wide in work bandwidth, low in polarization loss and high in coupling efficiency.

A gutter protector for keeping debris and insects out of the interior of a gutter comprises a plurality of flexible elongated gutter protector members formed of a porous open-cell foam, the foam incorporating therein an anti-microbial agent and a UV inhibitor. The members are formed in sections of predetermined length that are shaped to fit in predetermined gutter shapes. Each member has a recessed portion in a lower side that is spaced away from the gutter. The recessed portion is substantially isolated from the exterior of the protector member so as to permit water to flow unobstructed through the gutter without admitting insects to the interior of the recessed portion. For a conventional gutter shape, the gutter protector desirably has a generally right triangular cross section with a flat top and a tapered edge that fits under a front lip of the gutter.

Provided is a thin film magnetic head which enables both ensuring overwrite characteristics and preventing an adverse effect resulting from side erase, such as degradation in an output signal. An exposed surface of a magnetic pole portion layer is configured to have the shape of an asymmetric inverted trapezoid corresponding to a remaining region which remains after removing a width increasing region in the shape of a right triangle from a rectangular region on the side of a side edge. The side edge of the exposed surface is caused to correspond to the side on which a magnetic flux emitted from the magnetic pole portion layer onto a target track of a hard disk causes information to unintentionally overwrite existing information recorded on an adjacent track. This configuration allows preventing the exposed surface from extending to the adjacent track, thus preventing the adverse effect resulting from side erase.

The invention discloses a photonic crystal waveguide based superefficient compact T-shaped circulator. The photonic crystal waveguide based superefficient compact T-shaped circulator comprises a T-shaped photonic crystal waveguide with three end openings; a square magneto-optical dielectric rod is arranged in the center of the T-shaped photonic crystal waveguide; four square dielectric rods are arranged at four corners in the center of the crisscrossing waveguide; angles of the four square dielectric rods are cut to form into isosceles right triangles with the length of right angle sides to be identical to that of sides of background square dielectric rods to form into corner dielectric rods; the corner dielectric rods and left parts at corresponding lattice point positions of the corner dielectric rods are coincided or not; the insertion loss of the circulator is from 0.02db to 1db and the isolation of the two end openings is larger than 14db. The photonic crystal waveguide based superefficient compact T-shaped circulator has the advantages of being small in size, high in integration level, high in electromagnetic wave transmission efficiency, beneficial to integration and efficient and allowing circuiting and being widely applied to microwave, terahertz and light communication wave bands.

The invention relates to a three-dimension display device which includes a liquid crystal display panel and a column lens grating. The liquid crystal display panel includes a plurality of pixel units showing matrix shape distribution, each pixel unit is composed of three RGB sub-pixel. The column lens grating attaches on the liquid crystal display panel outside, a vertical normal angle between the column lens grating and the liquid crystal display panel is a, 0<a<90, the column lens grating includes a plurality of column lens arranged parallelly; wherein, the sub-pixel unit is parallelogram shape and is arranged to a plurality of bias orderly, a left and right edges of each column lens are coincidence with the sub-pixel unit edge parallelly, each column lens covers n pieces sub-pixel units in horizontal direction fully, n is more than or equal to 2, a right-angled triangle on two sides of the liquid crystal display panel is filled with black matrix. The three-dimension display device provided by the invention solves problem of sawtooth shape minus effect caused by the gating edge dividing the sub-pixel.

The invention relates to an online prevention and control method for low-frequency oscillation of an electric power system on the basis of two types of mechanisms. By the method, according to the idea of online pre-decision and real-time matching, low-frequency oscillation of a negative damping mechanism and low-frequency oscillation of a forced resonance mechanism can be monitored, the low-frequency oscillation of the negative damping mechanism can be monitored online and decision supporting information can be provided by utilizing a time-domain online Prony algorithm, a real-time small interference frequency-domain QR (quadrature right-triangle)algorithm, an IRA(irregular repeat-accumulate) algorithm and a characteristic value sensitivity principle; and further, when damping ratio of a capstan oscillation mode is higher than a damping threshold while oscillation exists, transmission rules of the low-frequency oscillation of the forced resonance mechanism and disturbance sources are recognized by a direct method and a hybrid dynamic simulation method which is implemented on the basis of PSD-FDS whole process stability analysis software. By the online prevention and control method which is high in credibility, real-time data source communication is guaranteed, and the low-frequency oscillation of the two types of mechanisms are monitored on line.

A combined fixture integrated platform comprises an indexing system, a fine adjustment system, a worm gear transmission system, a clamping system, a tensioning system, an upper bedplate, a lower bedplate, a support part, an adjusting gasket, a three-jaw chuck and flat tongs. The upper bedplate is connected with the lower bedplate by a hinge, the upper bedplate, the lower bedplate and the support part form three sides of a right-angled triangle, and a sinusoidal angle is changed correspondingly by means of changing the height of the support part by the aid of the sine law of the triangle. The indexing system can realize equal angular indexing, an indexing value of the minimum angle with 9.4-second difference can be achieved by the aid of the fine adjustment system, and a rotating system can realize a function of rotating a worktable. A sinusoidal table and an indexing disc are used together so as to obtain composite spatial angles. When the combined fixture integrated platform is placed at a limit angle of 0 degree or 90 degrees, functions of a planar worktable or a perpendicular worktable can be realized, workpieces in various shapes can be positioned and clamped by means of replacing the three-jaw chuck, the flat tongs and combined fixture elements, and multiple purposes of a combined fixture are realized.

Chiropractic aids for releasing tension in the muscle groups that act to form anteroposterior curvature in the lumbosacral region. Usable with wedge-shaped pads and a rectangular pillow, the principal aid is a convertible triangular pillow having two right-triangular members detachably hinged along their right-angle corners by a first surface fastener. A second surface fastener is provided on each right-triangular cylindrical member edgewise opposite the right-angle corner. Thus the surfaces defined by the counterpart short sides of the right-triangular cylindrical members can be detachably fastened together by the fasteners. To accord with an individual's lumbosacral region the triangular pillow is convertible by employing the two right-triangular cylindrical members: in combination hinged by the first and fastened by the second fasteners; hinged only and folded onto each other; unhinged (and unfastened) but stacked into other arrangements, in which like faces are not mated, or into a parallelepiped; or isolated and separately.

An easily manufactured large boom construction includes a plurality of main tube support sections fabricated from plate material of differing material thickness, grade and section dependent on load. The tube support sections include apertured areas which provide a preliminary snap-fit of the main tubes to significantly reduce need for additional fixturing. The opposite ends of diagonal tubes pass through apertures in the fabricated support sections for accurate tube location without complicated weld fixtures or precise tube length and cut end angle tolerances. The tubes are welded on opposite sides of the sections to eliminate need for tube-to-tube connections or connections wherein a cut end edge has to be precisely placed against a planar surface. An inverted right triangle boom cross section with wing over-top fold configuration ability provides strength, stiffness and infinite nozzle placement possibilities.

A compact planar antenna is disclosed wherein a radiating element in the shape of a right triangle is formed on a substrate. A ground plane may be positioned on one or both sides of the substrate. In one embodiment, the radiating elements are positioned on the substrate in groups of two or more in close proximity to one another. In another embodiment, the radiating elements are arranged in an array.

The gutter foam filter elements are generally triangular, four-foot lengths of flexible plastic open-cell foam material placed in and extending the full length of a conventional “K” type or similar roof gutter. The foam filter elements may be inserted within the gutter below gutter spikes. The foam material is an open pore polyether foam of 10-20 cells per square inch which allows rainwater to travel through the filter while excluding leaves. The foam is generally in the form of a right triangle and so disposed in the gutter as to have one side extending along the back of the gutter and the other side of the triangle extending between the across the upper open portion of the gutter. The sloped wall defines a void in the lower front portion of the gutter for rainwater flow to a downspout. The lower corner of the element is truncated forming a lower support wall.

The invention provides a reflecting mirror multidimensional adjusting device comprising an adjusting pedestal, a reflecting mirror backboard, a reflecting mirror, a connecting mechanism and adjusting mechanisms. One side of the reflecting mirror backboard is provided with the reflecting mirror, and the other side is corresponding to the adjusting pedestal. There are three adjusting mechanisms which are arranged on the adjusting pedestal in a right triangle. Each adjusting mechanism comprises an adjusting sleeve, an adjusting screw rod and a locking block. One end of the adjusting sleeve stretches into the adjusting pedestal, and the external side of the other end is sleeved by the locking block. The front end of the adjusting screw rod penetrates through the adjusting sleeve to be abutted against the back surface of the reflecting mirror backboard. The connecting mechanism is used for being elastically connected with the reflecting mirror backboard and the adjusting pedestal. The beneficial effects of the reflecting mirror multidimensional adjusting device are that a problem that the center position of the reflecting mirror cannot be moved in the adjusting process of the reflecting mirror can be solved, and a problem that certain existing adjusting mechanisms cannot be locked and fixed after completion of adjustment can also be solved.

A device for upper body support of a recumbent person is provided, which comprises a first support portion, a second support portion, each of which is wedge-shaped. Each portion is, in vertical cross-section, substantially a right triangle. The longest surface of each portion forms a support surface and the thin end of the wedge of the first portion is hingedly connected to the support surface of the second portion at a position spaced from the thick end of the support surface of that portion. The portions are formed of a solid, yielding support material, such as polyurethane foam. Preferably the support portions have a water proof outer surface.

An optical engine for an image projector comprises a light source, a taper rod, at least one light condenser, a prism module, a Digital Micromirror Device (DMD) and a projection lens set. One end of the taper rod is adjacent to the light source. Light generated by the light source is guided by the taper rod following a light path. The taper rod has increasing sizes of cross-sections along the light path, so as to decrease the dispersion angle of light, make the light more uniform, and increase the brightness of light. The prism module includes a first prism having a right triangle cross-section and a second prism having a wedge cross-section. The prism module receives the light from the condenser, passes the light toward the DMD, receives the light reflected by the DMD, and then passes the reflected light toward the projection lens set. The projection lens set projects the light on an external projection plane.