Abstract: This invention pertains to a novel double cut edger which is useful for facilitating the cutting of edges of double lapped wall coverings and the like. An apparatus useful for assisting in cutter edging overlapping sections of adjacent surface coverings comprising an elongated body portion with at least one straight side, and at least one slot parallel with the straight side of the elongated body portion and penetrating through and extending substantially the length of the body portion.

Abstract: Fillet weld inspection and measuring device having a plurality of individually displaceable parallel aligned slide members disposed in covered grooves in a base plate.

Abstract: A variable power reflectory type overhead projector for forming a projected luminous beam by lighting a reflecting mirror from the projecting lens side. A transparent film-to-be-projected support is provided between a regular position of the film to be projected and the projecting lens, and an auxiliary lens is included for focusing the projecting lens on the support.

Abstract: The assembly includes the plumb bob and line, and a cylindrical rotor mounted eccentrically for eccentric rotation about an axis of rotation. The line is connected at one end to the rotor and at the other end to the plumb bob. The rotor may be rotated to pay out and retract or wind in the line. The plumb bob may be stored within the casing. Side walls of the casing perpendicular to the axis of rotation closely confine the space beyond the rotor ends to confine the line as it is winding in.Other features include a conical sheath to receive the point of the plumb bob and arms to hold the cylindrical body of the bob; also a dentent cooperating with the casing and the folded handle may be used to hold the handle and the rotor fixed.

Abstract: Preferred forms of viewing apparatus according to the teachings of the present invention are shown as including an enclosed and elongated see-through passage having a hooded front opening. The rear end of the enclosed and elongated see-through passage includes a visually opaque annular perimeter portion extending around a rear opening of a size smaller than the front opening. The effect of the passage, the size relationships of the front and rear openings, and the annular perimeter portion is to separate the targeted object from its immediate surroundings and to create a visual window effect rather than a tunnel effect. In its most preferred form, the passage has a constant size throughout its length and the annular perimeter portion extends radially into the passage. The viewing apparatus includes a camouflage cover which can be removably secured thereto and a range finder on the annular perimeter portion for judging distances to the targeted object.

Abstract: An X,Y plotter for drawing drawings of great length has a plotting area over which paper is moved in one direction parallel to the length of the paper and drawing to be produced. A pen is moved in X and Y coordinate directions relative to the plotting area, by X and Y carriages, to draw on the portion of the paper currently at the plotting area. The elongated one of the two carriages extends parallel to the length of the paper and is supported at its opposite ends by two stationary guide rails extending across the width of the paper and spaced by less than the width of the paper to allow the carriages to be made of small size and light weight. Associated means for providing precise tracking and advancement of the paper are also described.

Abstract: An apparatus (10) for identifying molecular contamination in an environment includes a pair of crystals (12, 14) supported within supports (16, 18, 20) which are cantilevered to a base (44) by standoffs (36). Base is housed within an enclosure (56) which opens through an opening (54) to an environment to be tested. Contaminants from the environment are deposited on sensing crystal (12) which, after a build up of the contaminants thereon, is heated by a heater. Through a thermo-gravimetric analysis, the points at which contaminants on crystal (12) sublime provide a means for identifying the contaminants.

Abstract: A probe for measuring heat includes an elongate rod fitted within a sheath, and a plurality of annular recesses are formed on the surface of the rod in a spaced-apart relationship to form annular chambers that are resistant to heat flow. A longitudinal bore extends axially into the rod and within the cylinders defined by the annular chambers, and an integrated heater and thermocouple pack is dimensioned to fit within the bore. In construction, the integrated pack includes a plurality of wires disposed in electrical insulation within a sheath and a heater cable. These wires include one common wire and a plurality of thermocuple wires. The common wire is constructed of one type of conductive material while the thermocouple wires are each constructed of two types of materials so that at least one thermocouple junction is formed therein. All of the wires extend the length of the integrated pack and are connected together at their ends.

Abstract: Defects in an underground channel, such as a sewer, are detected by an infrared scanning device (preferably an infrared video camera) moved internally along the channel. The scanning device senses temperature deviations which mark defects in the channel, as, for example, deviations due to the inflow of cool extraneous water into a sewer. The scanning device is in communication with an above-ground central unit which processes the scanning device output and displays and/or records thermal representations of the defect. The central unit also monitors the location (distance travelled) of the scanning device so that the locations of defects may be determined.

Abstract: A terrestrial magnetic sensor has a bobbin body having a magnetic core inserting groove, a silicon gel filled in the magnetic core inserting groove, a magnetic core buried in the silicon gel filled in the magnetic core inserting groove, and a bobbin cover for closing the magnetic core inserting groove of the bobbin body. Thus, this terrestrial magnetic sensor can suppress the decrease in the magnetic permeability by burying a magnetic core in a silicon gel and can be hardly affected by the influences of the variations in an environmental temperature and an external stress.

Abstract: A method of continuously measuring a successively conveyed lengthy body. Light sensors are located above and laterally of the conveying path of a conveyor and measure the distances from the sensors to various points on the surface of the lengthy body while being conveyed. The sectional area of the body is then calculated by a computer, and further the weight of the body is calculated. Various kinds of light sensors are applicable to the method of this invention.

Abstract: Disclosed is a measuring device for determining both absolute and comparative depths of the countersunk portions of countersunk holes drilled in a workpiece, the measuring device being capable of centering itself within a hole being measured so that repetitive measurements can be made early and accurately; further the measuring device is capable of measuring the depth of a countersunk hole through a template.

Abstract: Provided is an open sight addition for a telescopic gun sight of a type having a front bell which includes a cylindrical forward portion and a frustoconical rearward portion. A sight bead is mounted on an upper central portion of the cylindrical forward portion of the bell. The sight beat projects vertically upwardly from the bell. An elongated sight line is formed on an upper central portion of the frustoconical rearward portion of the bell, rearwardly of and in axial alignment with the sight beam on the forward cylindrical portion of the bell. The sight bead and the sight line together form a sight plane.

Abstract: In a switching multi-coordinate probe an accurate and accurately reproducible switching behavior is attained by a plurality of seating points, which all have the same elasticity but also a relatively high stiffness. The bearing members (14) and their counterbearing support members (16) exhibit an adequate number of degress of freedom, in order to be able to accurately align themselves with respect to each other during assembly. After adjustment the contact zones of the individual bearing members (14) form with their counterbearing support members (16) circular lines, which all lie in one plane with respect to the stylus axis (FIG. 1).

Abstract: An apparatus for determining the top and the bottom surface of a metallic workpiece, such as a steel slab. The apparatus is positioned proximate to the workpiece and includes a rail beam which may be translated across the width of the workpiece. A first arm is pivotally coupled to a first end of the rail beam and a second arm is pivotally coupled to a second end of the rail beam. The two arms are pivotally interconnected at top ends thereof by a tie rod, thereby forming three sides of a parallelogram. Deflection of the first arm during translation of the rail beam across causes a similar deflection of the second arm. The deflection of the second arm may be recorded, thereby recreating the surface profile of the workpiece.

Abstract: Displacement sensors which are communicated with a stationary reference side are placed at the measuring points of a large structure. Displacement at each measuring point is electrically measured by utilizing the fact that the liquid levels at the stationary reference side and each measuring point are at the same level.

Abstract: A method and apparatus is disclosed for determining the amount of taping time used and/or remaining on standard VHS and Beta format video tape cassettes. Multiple scales are organized onto a single multi sided card having a corresponding number of corners. In the preferred embodiment there are five scales, one scale each for the three standard VHS taping speeds, and two for the standard BETA taping speeds. The scales start and end inwardly of the corners that are adjacent the scales.

Abstract: A digital tape measure comprising a tape stored in a case when it is not used and drawn out of an aperture of the case when it is used and onto which a plurality of detection marks are affixed at equivalent interval, a detector of detecting the detection marks by photoelectric transfer elements, a counter of counting the detected signal being output from the detector corresponding to the volume of movement of the tape, a display of displaying the result counted by the counter, and in which a length of each detection mark is established to be a length twice as long as the minimum scale of the tape, the distance between each detection mark is established to be equivalent to the length of each detection mark in the direction of measurement, and the detector comprises two photoelectric transfer elements arranged at the phase difference of 90.degree. and a discriminator of discriminating the output signal from the photoelectric transfer elements.

Abstract: A fine positioning device is formed of a central rigid portion, a first set of outwardly-extending portions extending symmetrically along a first axis from the central rigid portion, a second set of outwardly-extending portions extending symmetrically from the central rigid portion along a second axis which is perpendicular to the first axis, a first set of parallel flexible-beam displacement mechanisms provided symmetrically to each other with the first set of outwardly-extending portions respectively to produce translational displacements along the second axis, and a second set of parallel flexible-beam displacement mechanisms provided symmetrically to each other with the second set of outwardly-extending portions respectively to produce translational displacements along the first axis. Three set of radial flexible-beam displacement mechanisms are provided to produce angular displacements about three axes.

Abstract: Airport twenty-four hour pilot information markers are provided to tell the pilot: upon takeoff or landing how many feet of runway remain; before takeoff or after landing what taxiway he or she is to follow; what is the direction, inboard, outboard, north, south, east, or west, etc.; what is the intersection; what is the holding position; and/or what is the destination; etc.