Abstract: A slitter-scorer apparatus comprises upper and lower slitter-scorer units which are disposed in one above the other relationship and are vertically movable respectively. The apparatus can immediately change slitting and scoring operations along the flowing direction of long and flat materials, which are fed continuously, without any reduction of the flowing speed of the materials, and the operations can be performed on the materials which flow along an approximately straight line, while the total length of the slitter-scorer apparatus is shortened to the upmost.

Abstract: Polyoxyalkylene polyamide lubricants having a terminal carboxylic acid group and a terminal amine group in the same molecule and a degree of polymerization of from 2 to 10 and salts thereof are provided. Stable aqueous based compositions are prepared from the polyamide or its salt, that are useful metal working and hydraulic fluids.

Abstract: A receiver and transmitter apparatus is disclosed which is of the superheterodyne type and is capable of scanning a plurality of channels and receiving and transmitting on such channels. The apparatus incorporates a phase-locked-loop frequency synthesizing means for generating beating signals for use in tuning specific channels and also incorporates means for controlling the frequency synthesizing means and the overall receiver and transmitter operation. The apparatus includes a display for viewing information during its operation.

Abstract: A glove having three layers, an outer covering layer of leather, cloth or the like, an inner lining of an insulating material such as cloth, wool, fur and an intermediate member of a thin plastic having microscopically minute pores through which gas may pass but not liquids, e.g. water. The outer and inner layers are formed into gloves as by sewing. The intermediate layer of, for example, extremely thin polyurethane, is fabricated by heat sealing the edges of the front and back blank halves together to form an integral glove member. The intermediate glove layer is telescoped into the outer glove layer and similarly, the inner lining is telescoped into the intermediate layer. Only the outer and inner layers are stitched together at the wrist portion leaving a free-standing, breathable, waterproof intermediate layer therebetween which is integral and unattached. The resulting glove structure is water resistant and air permeable.

Abstract: A flexible, nonstress-bearing bone prosthesis is disclosed that comprises demineralized bone powder contained within a medical grade porous flexible casing made from polymeric fibers or a micro-porous membrane. The pores of the casing are smaller than the particle size of the bone powder but large enough to permit ingress of body cells associated with bone formation.

Abstract: The shank of the prosthesis is provided with a plurality of parallel grooves in order to improve adhesion of the shank in a prepred bone cavity. The grooves are used to improve adhesion either directly to bone tissue or to a cement bed within a bone cavity. The grooves are spaced apart on a center-line to center-line distance of a few millimeters and each has a depth of several tenths of a millimeter.

Abstract: An aquassage apparatus for agitating water in a bath tub has a flexible, soft tubing which is pliable enough to be bent into different configurations. Suction cups are glued to the bottom of the tubing for secure attachment to the bottom of the bath tub. The tubing has a plurality of perforations for allowing compressed air to be horizontally injected therethrough. The tubing is connected to a tee junction at one end, the tee junction is connected via a valve to an exhaust port of a vacuum cleaner. The valve of the present invention has a cylindrical housing with a closed (capped) outer end with a plurality of slots and an open inner end connected to the exhaust port of the vacuum cleaner.

Abstract: A bed frame that includes a novel connector assembly for connecting a cross rail to a side rail at a corner of the bed frame that permits the frame to be easily and quickly set up and taken down, yet which provides a substantially wobble free joint, and a novel box spring retainer bracket that is connected to the frame without use of fasteners yet which is movable between use and storage positions as desired while remaining connected to the frame.

Abstract: A waterbed mattress includes a buoyant honeycomb core structure attached only to the bottom wall of the mattress. The core structure includes a plurality of openings and a plurality of buoyant members integrally formed with the core and containing buoyant, flotation-promoting means sealed inside them.

Abstract: A mattress of the type retardant to flame and entirely free of metal inner springs is built upon a basic box structure having side walls of relatively stiff, firm material, such as plastic impregnated ticking, to which top and bottom sheets of cotton fabric material is attached at respective adjacent edges. The box structure is filled with a mass of garnetted cotton felt in which is blended a quantity of boric acid powder to create a filling which will not support combustion under direct flame exposure. There is an additional top and bottom layer of cotton felt, also blended with a similar quantity of boric acid powder, and covered on both sides with plastic impregnated water resistant ticking, the ticking being stitched to corresponding edges of the side walls.

Abstract: A cementing press for cement attaching outsoles to lasted footwear has a counter support receiving the outsole. Two presser members are provided, one acting on a heel portion and the other acting on the toe portion of a last. A free swinging rocker assembly serves as a counter support, and includes locking means actuated before the application of full pressure, for locking the assembly in the position which the rocker assembly has assumed upon the shoe bottom being laid thereagainst.

Abstract: A system for stiffening the shank of an insole uses a stiffener which is formed from an initially flexible and deformable strip of thermosetting resin, preferably mixed with reinforcing fibers such as fiberglass. A length of such shank strip material is applied onto the bottom of an insole and the insole, with the shank strip in place, is mounted in a special fixture. The fixture holds the strip on the bottom of the insole and also assures that the insole and shank strip will be held in the proper configuration, with the proper bend at the ball and the arch. With the shank strip and insole so held an external stimulus, such as radiant heat, is applied to the shank strip to activate and cure it in place on the insole bottom.

Abstract: Agitator restrictor structure in combination with a revolving or a reciprocating type sweep drive is located close to the nozzle mouth in a suction cleaner by providing a cavity in the agitator structure for recessing the major portion of the cleaning brush to retain the designed bristle tuft lengths. In this location, the agitator structure restricts and changes the shape of the airstream at the nozzle opening to increase its speed, resulting in greater cleaning efficiency.

Abstract: The present invention briefly refers to a window squeegee for use in washing windows and similar plane surfaces. It comprises a handle (1) having an attachment portion (3) for a scraper blade (4), the scraper blade being detachable secured to the attachment portion (3). The scraper blade (4) is constituted by a rubber blade (6) which is clamped between the legs of a metal strip (5) having substantially U-shaped cross-section. The attachment portion (3) is suitably comprising two protruding shoulders (9) adapted to contact one of the legs of the scraper blade strip (5) and at least one tongue (10) adapted to contact the other leg of the scraper blade strip (5). The tongue or tongues are provided with a ridge (11) protruding towards the scraper blade (4) and receiving in a notch (8) in the other leg of the scraper blade strip (5).

Abstract: A door-operating mechanism is disclosed which is particularly suited for use with hingedly mounted swinging glass doors of a refrigerated display cabinet. The door operating mechanism includes an extensible gas spring biased toward an extended condition, and a linkage arrangement operatively interconnecting the gas spring with the door. A portion of the gas spring is movably disposed within a slot defined by the linkage arrangement such that in one position of the gas spring the door is biased toward its closed position, and in another position of the gas spring the door may be maintained in an opened position such as for stocking or maintenance of the display cabinet.

Abstract: A hinge bracket-mounting plate assembly comprises a detent nose carried at the end of a spring-loaded detent lever and also has a detent opening or detent abutment. When the hinge bracket has been inserted into a track of the mounting plate and pushed along the latter, the detent nose snaps into the detent opening or against the detent abutment to releasably lock the parts together. The extent to which the hinge bracket can be pushed along the mounting plate is limited by a stop, which becomes effective when the detent nose snaps or after it has snapped into the detent opening or against the detent abutment. To eliminate backlash, the detent nose has an engaging side face, which bears on an edge or surface of the detent opening or detent abutment to force a stop carried by the hinge bracket or the mounting plate into backlash-free engagement with a complementary stop carried by the other part.

Abstract: A device for deshirring, smoothing and braking a shirred tubular casing during stuffing of the tubular casing with a fluid material, such as a sausage mixture, comprising a substantially rigid hollow body with an outer circumferential surface having a substantially circular cross section and with a central opening having securing elements for receiving and releasably securing the hollow body on the outer surface of the stuffing horn of a stuffing device adjacent the stuffing horn outlet. The hollow body is disposed inside an unshirred end portion of the shirred tubular casing having a prescribed inner diameter, and said hollow body has a substantially annular, cylindrical form with a maximum external diameter which is smaller than the prescribed inner diameter of the unshirred tubular casing.

Abstract: A device for deshirring, smoothing and braking a shirred tubular casing during stuffing of the casing with a fluid mass flowing under pressure from the stuffing horn of a stuffing machine into the tubular casing. The device comprises an annular body having a central opening releasably securable to the stuffing horn, said annular body having recesses on its outer surface extending parallel to its longitudinal axis. The recesses have a substantially U-shaped, V-shaped or rectangular cross-sectional configuration or end view configuration. The configuration of the braking and smoothing elements corresponds to that of the recesses in the surface of the annular body. The braking elements and/or the annular body are displaceable relative to each other either parallel to the longitudinal axis of the stuffing horn or the elements are displaceable perpendicular to the longitudinal axis of the stuffing horn so that the braking elements can be extended into the recesses or spaced away from the recesses.

Abstract: The combing and drawing frame having a comber cylinder provided with sawtooth clothing, which is surrounded over part of its circumference by a fixed comber bed with sawtooth clothing and which is mounted in front of at least one pair of drawing rolls and mounted behind at least one pair of drawing rolls, comprises a feed device or guide for the sliver which is to be processed, this feed device being capable of being adapted to fit closely against the comber cylinder so as to improve the quality of the sliver which is processed. The feed device may be in the form of a lap plate or a feed roll, each being associated with an upper feed roll.

Abstract: A banding strap for attaching a heat shield to a muffler comprises a strap for encircling the muffler and heat shield, the strap including an underlying end segment and an overlying end segment, each including outwardly projecting shoulder sections providing abutments for crimping to interlock the end segments and tighten the strap around the muffler and heat shield. The outwardly projecting shoulder section in the overlying end segment forms an inwardly opening bight for receiving the outwardly projecting shoulder section in the underlying end segment. Each shoulder section includes an inwardly projecting indentation so that the indentation of one of the shoulder sections nests within the indentation of the other of the shoulder sections when the shoulder sections are engaged to prevent lateral misalignment of the end segments with respect to each other.

Abstract: A combination vibration damper and fastener comprises head portions of the shape of a suction disc opposed back to back to each other across a space and adapted to collide with two separate panels, shanks extended in opposite directions from the head portions and provided with engaging means, damper pieces extended aslant from the head portions so as to be opposed to each other, and a connecting piece serving to connect the two head portions to each other. Insertion of the opposite shanks into the fitting holes bored in advance in the two panels fastens the two panels as separated by a fixed distance from each other. Vibration arising in one of the panels is absorbed by the damper pieces and prevented from reaching the other panel.

Abstract: The invention provides an improved plastic socket component of the female snap of a snap fastener, which socket component is attached to one face of a flexible sheet such as the cloth of a garment by means of a rivent driven in from the other face of the flexible sheet and includes a cavity for coupling and uncoupling with a projection formed on a male snap. The cavity is surrounded by a thick peripheral wall having a plurality of relatively long arcuate embossments arranged at small intervals in the peripheral direction on an upper inner surface portion of the wall and a plurality of arcuate slits substantially equal in length to the embossments and arranged outwardly opposite thereto, the slits extending vertically through the peripheral wall. Adjacent pairs of the slits are interposed by thick wall portions having high rigidity.

Abstract: A locking ring for necklaces and the like comprises a locking ring (1) and a second smaller ring (2) intended for fastening a necklace or the like, which rings prior to the attachment on a necklace include a slit (7) between the openings of the two rings, so that a necklace or the like is threaded through the slit on the smaller ring through the detachable opening of the circlip (1). After the necklace or the like has been threaded on, the two parts are pressed together, and in the slit centering and snap-in means are located, so that the two rings do not spring apart after the mounting.

Abstract: An apparatus for the steam conditioning of lengths of textile fabrics includes a frame carrying a fabric spreader for spreading of the fabric in a spreading zone, steam boxes for application of steam to the spread fabric within a steam zone, a cooling zone, and fabric advancing mechanism for advancing the fabric through the steam and cooling zones. A duct system encloses the steam boxes and, in conjunction with one or more blowers, evacuates steam upwardly and downwardly from a region adjacent the steam boxes thereby confining the steam zone to the region between the discharge sections of the steam boxes and preventing the migration of steam to areas upstream and downstream of such steam zone.

Abstract: A comingling jet having a body or housing through which a right cylindrical yarn chamber extends and an air entry orifice which intersects and communicates with the yarn chamber so that their axis are perpendicular to one another. An adjustable pin assembly is provided at the entry opening of the yarn chamber to modify the air flow characteristics of the yarn chamber.

Abstract: U-shaped forms (1a) are cut in a band (1) consisting of electrically conductive material, which free cut the future measuring elements (1c) except for a connection at one side with band (1). The band (1) is placed on an insulating base (2) and connected with it. The band (1) is then cut along lines A and B, to provide individual electrically conductive elements (3a) arranged in succession and isolated from the teeth (3b) of the cut band (3). The thus produced scale can be reinforced by application of a carrier band (5).

Abstract: The burnishing tool has a plurality of holes in the planar surface which engages the flexible magnetic disk. Each hole contains a burnishing blade positioned at 45.degree. to the direction of motion. A manifold connects each hole to a vacuum pump which draws air into the holes causing the flexible magnetic disk to fly against the planar surface. The vacuum also removes the debris from the burnishing tool.

Abstract: A rocker arm and method of making same are provided. The rocker arm is of the cam-follower type and is preferably made from a stamped metal piece and a stamped metal strip, the latter preferably being of a hardened alloy. A rounded recess is formed at one end portion of the metal piece and facing away from the metal strip to receive a lifter post having an end on which the rocker arm can pivot. The metal piece also has an additional recess at another end portion to receive an end of a valve stem. The metal strip has an intermediate convex portion facing away from the metal piece to be engaged by a cam. The metal piece has a hole extending through the piece and communicates with the rounded recess while the strip forms a groove communicating with the hole and extending toward the convex portion to supply lubricating fluid from the convex portion to the rounded recess.

Abstract: A single or multi-orifice metal nozzle structure suitable for use in an ink jet printing system. The metallic nozzle member has at least one orifice extending therethrough, the orifice including a cylindrical portion, adjacent the outlet face of said nozzle, having a height ranging from 0.25 to 5 times its diameter and at least one frustoconical section divergent toward the face opposite the outlet face and communicating with the cylindrical portion. Where the metal nozzle is a multi-orifice metal nozzle, each frustoconical section communicates with a groove disposed in the face opposite the outlet face. The multi-orifice metal nozzle is prepared by grooving a metal plate with at least one groove, punching a plurality of frustoconical sections into the groove member and then forming a cylindrical portion into each frustoconical section and through the plate member.

Abstract: A method for manufacturing a device for the magnetic treatment of fluids including water, liquid and gaseous fuels, propane, oil and the like. An elongate inner tubular casing having a magnet therein is supported within an intermediate casing made of a ferromagnetic material, and a pair of end fittings are connected to opposite ends of the intermediate casing and serve to center the inner casing therein. The end fittings each have a tapered passage therein, and as they are threaded on the ends of the intermediate casing, the ends of the inner casing are guided into the tapered passages and are gradually deformed inwardly thereby so that the tapered passages tightly seat against the ends of the inner casing to prevent radial and axial movement of the inner casing relative to the end fittings. This results in a self adjusting support of the inner casing and avoids crimping or other deformation which may result if the end fittings are threaded too far.

Abstract: A multiple part wheel cover comprises a retainer plate, separate axially inner and outer one-piece spoke assemblies, having spokes extending to outer free-standing ends and a hub cover. The retainer plate and inner and outer spoke assemblies are supported coaxially in predetermined axial spacing. Bending force is applied to the spokes to bend them resiliently within elastic limits sufficiently to align their radially outer ends respectively with recesses in the rim. Thereafter the bending force is progressively relaxed and the supported parts are simultaneously and progressively moved coaxially toward each other to cause the outer ends of the spokes to enter their recesses as the spokes straighten resiliently. The parts are then secured together by clamping the hub cover toward the hub of the retainer plate, whereupon removal of the outer ends of the spokes from their recesses is prevented.

Abstract: A sucker rod having improved coupling capability for joining successive lengths of sucker rods in a string has a pin end coupler on one end and a box end coupler on the opposite end. The string is formed by inserting the pin end of one rod directly into the box end of the successive rod without the need of an intermediate cylindrical sleeve. A method of refurbishing the threaded end portions of used sucker rods involves cutting off the old threaded end portions and rethreading the rod ends. An internally threaded pin end coupler is then secured on one end of the rethreaded rod. An internally threaded box end coupler is threadedly secured on the opposite end of the rethreaded rod.

Abstract: A method and apparatus for sealing a hole in the inner wall of a double wall heat exchanger in which cover means is positioned in biased relationship to the hole and a frame positioned in the opening through which the cover means is inserted against the hole.

Abstract: A method for the manufacture of target boards for darts or archery, wherein the target boards are made by: compressing fibrous material into a cylindrical bundle with a set of press molds provided with clamp members adapted to clamp the fibrous material so as to remain in cylindrical shape, cutting the cylindrical bundle into circular pieces each being clamped by a pair of clamp members; bonding a reinforcing plate onto one surface of each of the circular pieces; removing the clamp members from the circular pieces; banding the circular pieces with metal strips around the periphery and covering the second surface with a decorative cover sheet.

Abstract: Disclosed is an improved Josephson junction comprising a superconductor-separator-superconductor laminar deposition on a substrate, the overlying and underlying superconductor layers being laid offset to each other, and a weak link extending from one of the superconductor layers to the other across the thickness of the intervenient separator. A triple layer superconducting device according to this invention has as short barrier length and as low capacitance as possible, and is characteristic of a large product of junction resistance and critical current. Also, the geometrical configuration of the device is most appropriate for the purpose of massproduction.

Abstract: A method for fabricating a semiconductor integrated circuit structure having a sub-micrometer length device element is described wherein a surface isolation pattern is formed in a semiconductor substrate which isolates regions of the semiconductor within the substrate from one another. These semiconductor regions are designated to contain devices. At least one layer is formed over the device designated regions and etched to result in a patterned layer having substantially vertical sidewalls some of which sidewalls extend across certain of the device regions. A controlled sub-micrometer thickness sidewall layer is formed on these vertical sidewalls. The patterned layer is then removed which leaves the pattern of sub-micrometer thickness sidewall layer portions of which extend across certain of the device regions. The desired pattern of PN junctions are now formed in the substrate using for example diffusion or ion implantation techniques with the controlled thickness sub-micrometer layer used as a mask.

Abstract: Processes for manufacturing insulated-gate semiconductor devices such as MOSFETs wherein the source and base regions and the source-to-base ohmic short are formed employing self-aligned masking techniques are disclosed. In the exemplary case of a MOSFET, the processes begin with a semiconductor wafer (such as silicon) including a drain region, a gate insulating layer initially formed uniformly on the surface of the drain region, and a polysilicon conductive gate layer. Through subsequent masking and etching steps, channels are etched through the polysilicon gate layer at least to the drain region. The un-etched portions define polysilicon gate electrodes spaced along the drain region. A two-stage polysilicon etch procedure is disclosed. An initial etch step produces relatively narrow channels. Unetched portions of the polysilicon layer are then used as masks to form a shorting extension of the device base region, preferably by ion implantation.

Abstract: A semiconductor device is fabricated by a process in which an aperture (4) is an insulating layer (3) along a surface (2) of a semiconductor body is utilized in defining the lateral extents of zones (6, 7, and 8) in a circuit element of the device. In particular, the insulating layer is first provided with the aperture along the surface. A semiconductor layer (5) is formed on the insulating layer, including the portion within the aperture. Using the edge of the insulating layer along the aperture as a masking edge, a pair of opposite-conductivity dopants are introduced selectively into the aperture and a third dopant is introduced through all of the aperture into the body. The third dopant may be introduced into the body before the semiconductor layer is formed.

Abstract: A disposable razor device for cutting and trimming hair in the nostril passages. The device comprises a hollow, tubular, body member having a dome-shaped end for insertion into the nasal opening, and an opposite end provided with an enlarged base for rotating the body. A pair of inserts are included, each of which has a pair of razor blades formed therein, the inserts being oppositely disposed from each other, and arranged with one pair of razors positioned clockwise and the other pair of razors positioned counter-clockwise, whereby hair can be cut and trimmed by rotating the body of the device with a back-and-forth motion. The device further includes a removable cover.

Abstract: A chain saw safety improvement is disclosed. Enclosed in a hollow guide bar is a link positioning device which moves the links on the chain into a cutting or safety position. This device is spring tensioned and normally in the safety position. The chain links themselves are pivotable and scythe-shaped, the tips acting as safety tails. When the link positioning device is in its normal safety position, it pushes the safety tails, moving the links into a noncutting position. When tension is manually released by the operator, the links may move into their cutting position.

Abstract: This invention discloses a method and an apparatus in which coordinates of points on a plurality of sections of a three dimensional thing are measured based on a plurality of different coordinate systems and then transformed into those in a single reference coordinate system.

Abstract: A plotting device is disclosed containing a traveling carriage drawing apparatus and distance measuring devices in the traveling carriages which emit a number of electrical pulses which are proportional to the displacement of the traveling carriages and which are weighted with an adjustable scale factor, to be measured as coordinate values (x, y) of a basic Cartesian basic coordinate system. The measured coordinate values are transmissible to and recordable by indicator units located within the area of a traveling carriage. The basic coordinate system possesses a selectable, stationary zero point and fixed axis directions in the traveling direction of the traveling carriages.

Abstract: A method for determining the bias angle of the oblique metal reinforcing elements in annular belt layers located in crown areas of pneumatic tires that includes cutting a transverse tire section and preparing the cut edges so that the individual elements are clearly defined, securing a strip of paper, co-extensive with the tread portion on the peripheral surface thereof, locating and marking radial centerlines on the cut edges and connecting same so as to form a longitudinal centerline on the paper strip; applying one probe end of an electrical conductivity meter to one end of a selected element on one of the cut edges and locating the corresponding end of this element on the other cut edge via the other probe end, drawing lines, parallel to the radial centerlines to the edges of the paper strip and connecting same with an oblique line across the noted longitudinal centerline thus permitting measuring of the bias angle therebetween.

Abstract: An error correction system is disclosed which includes an error correction profile element which extends in a measuring direction inside a housing which contains a measuring scale. The disclosed error compensation system is used to compensate for guidance errors of machines or division errors of the measuring scale. The correction profile element is made as a one piece element having regions of reduced cross sectional area. The profile element is mounted to the housing by means of eccentrics which can be used to adapt the contour of the correction profile element to correspond to the error to be compensated. The error correction profile bends at the regions of reduced cross sectional area while retaining a rectilinear profile in the intermediate regions between the regions of reduced cross sectional area such that a smooth transition is provided between the intermediate regions.

Abstract: A detecting device for detecting the number of rotations of a wheel at a bicycle, comprises a fixing member fixed to a hub shaft and a rotary member fixed to a hub shell supported rotatably to the hub shaft, the fixing member being opposite and close to the rotary member, so that at the opposite portions therebetween are provided a detecting element and actuators, the actuators operating said detecting element to thereby provide a detection of the number of rotations of the wheel by use of rotations of the hub shell.

Abstract: An apparatus and method for measuring the angle of at least one side surface of an endless power transmission belt construction of a V-belt type is provided, the apparatus having a first part against which the belt construction is adapted to be disposed in a belt construction measuring position thereof and having a second part pivotally mounted to pivot on an axis thereof and being adapted to be pivotally disposed against the one side surface to indicate the angle thereof by the relation of its pivoted position relative to a reference when the belt construction is against the first part in the measuring position thereof, the apparatus having a moving device operatively interconnected to the second part to tend to move the same toward the belt construction in a direction substantially transverse to the axis thereof when the belt construction is in the measuring position thereof. A method of making such an apparatus is also provided.

Abstract: Wheel alignment testing apparatus is shown for use with the wheels of a motor vehicle. This apparatus is adapted for use with the racks of an alignment machine. A remote monitoring console would be provided with gauges for recording the reading of caster, camber, toe and turning radius angles of both front wheels of the vehicle. The apparatus includes two units, one unit for each front wheel. Each unit has a stationary base and a wheel-supporting platform or turntable with front and rear rails for centering the center of the wheel on the vertical turning axis of the turntable. A cross-bar transducer is supported from the turntable, and it is provided with electrical strain gauges at both the front and rear of the wheel for sensing either a positive or negative caster angle, as well as at both the left and right sides of the wheel for sensing either a positive or negative camber angle.

Abstract: An inclinometer has a ferromagnetic ball levitated between pairs of electromagnets. When the inclinometer changes attitude, the ball moves in response to the change in relative gravity direction. Alternating currents are applied to the proper electromagnets and in the magnitudes needed to re-center the ball. The same signals which determine the re-centering currents are the inclinometer outputs.

Abstract: A device for setting the inclination of a reference object such as a mirror or the like, used as a reference for lining up, levelling in, etc. The mirror (10) is rotatably balanced about an axle (12) and a portion thereof below said axle is provided with a moveable bob (14). A displacement of the bob causes the desired inclination of the mirror about the axle.

Abstract: A rail type universal parallel ruler device comprising a drawing board, a horizontal rail mounted on the drawing board, a horizontal cursor mounted shiftably on the horizontal rail, a vertical rail connected to the horizontal cursor, a vertical cursor mounted shiftably on the vertical rail, and a head connected to the vertical cursor, the improved rail type universal ruler device wherein a magnetic member is disposed on each of the cursors and rails for guiding the cursors and/or on a tail portion of the vertical rail and the side of drawing board for guiding the tail portion of the vertical rail, and magnetic force is caused to work between the magnetic members in a direction where the cursor is floated relative to the surface of rail and/or a direction where the tail portion of the vertical rail is floated relative to the surface of the drawing board side.