Abstract: A bore sighting apparatus and method includes a light source contained within a housing, which is in the form of a stepped cylindrical insert placed in the firing chamber of the firearm. The housing is in the form of a series of interconnected stepped cylindrical portions corresponding to the firing chambers of different calibers of firearms, with the largest portion being located at the rear of the firing chamber. Light is projected from the housing through the bore of the barrel and through the muzzle to a target placed at a pre-established distance from the muzzle. Calibrated points are marked on the target; and the sights of the firearm are adjusted to the calibrated points to effect the bore sighting of the firearm for a specific range.

Abstract: A banding material is disclosed for use as the band in a band clamp. The banding material is provided from a roll of banding material from which a length of the banding material corresponding to the length of the desired band is cut. The length of the band for the band clamp is determined by counting markings on the band which are related to the diameter of an object about which the band clamp is to be fitted. In a preferred embodiment, the markings are .pi. units, or fraction of .pi. units, apart where the diameter of the object is measured in the same units.

Abstract: An attitude sensor comprises a spherical ball suspended in a fluid contained in a housing. The ball is maintained neutrally buoyant with respect to the fluid and out of direct contact with the housing. A means is provided for detecting the orientation of the ball. The sensor is particularly useful as a compass, in which case one or more magnets may be provided within the ball or a passive magnetic element is provided which is influenced by the earth's magnetic field.

Abstract: An apparatus for use in marking a length of cylindrical pipe to permit the pipe to be cut for use in an assembly and arranged so that a plurality of markings on a length of pipe can be accurately oriented relative to each other. The device has a tubular plastic sleeve that is split in a plane of the sleeve longitudinal axis, the sleeve being flexible so as to permit the sleeve to be expanded over and subsequently to conform to the external surface of a pipe. The sleeve has at least one end with a configuration of a desired marking. A bubble level is affixed to the exterior surface of the sleeve so that when the sleeve is used to make more than one marking on a length of pipe, the markings can be axially oriented with respect to each other.

Abstract: A telescope sight collimating device including a laser aimer, a longitudinal center axle at one end of the aimer sleeved with a split sleeve and threadably engaged with a lock nut at its free end for positioning the device in the barrel of the gun, a tapered tubular locating rod and a tapered tubular tightening up rod respectively mounted around the longitudinal center axle and engaging both ends of the split sleeve, and an adjusting nut mounted around the longitudinal center axle and turned in either direction to move the tapered tubular tightening up rod forward or backward, causing the sleeve to be fixed to or released from the inside wall of the barrel of the gun.

Abstract: Disclosed is a measuring tape including a tape reel driven by a reversible motor through an annular wheel via a first transmission gear set to let off a tape blade for taking measurements or to rewind it by means of the control of a switch, a guide roller and a pressing roller driven by the annular wheel through a second transmission gear set to guide out the tape blade at a higher speed than the tape reel so as to prevent the tape blade from being loosened, and a release control mechanism controlled by the switch to move the pressing roller within the operative and the non-operative positions.

Abstract: An arm 12 for holding a tool-setting probe 14 in a machine tool is rotatable between an operative position and an inoperative position. The operative position is defined by elements 48,52 which form a stop against further rotary motion beyond the operative position. These elements 48,52 are arranged as a kinematic support, so that the operative position is defined in a precisely repeatable manner. Springs 40 urge the elements 48,52 together. When the arm is in the operative position, these springs are stretched by a repeatable amount, so that they provide a repeatable force, in order to increase the precision of the operative position.

Abstract: Apparatus adaptable for attaching to a plurality of lugs associated with a vehicular wheel assembly to enable mounting a wheel alignment instrument or other device adjacent to the vehicular wheel assembly, the apparatus including a plurality of lug engaging members or assemblies movable to angularly and radially spaced positions relative to the axis of rotation of a vehicular wheel assembly corresponding to the locations of selected lugs of different lug patterns for attachment thereto, the preferred construction being adaptable for attachment to at least lug patterns having four, five, six and eight lugs and to different size and shape lugs, and including structure enabling radially moving the lug engaging members simultaneously by rotation of a hand knob or other member and structure enabling positioning and maintaining the lug engaging members in a desired angular relationship during radial movement thereof and attachment to the wheel lugs.

Abstract: A strut height adjusting apparatus for adjusting the height of a strut automatically and simultaneously to measure the height of a floor while ensuring the perpendicularity of the strut with a warning sound or other indication. The strut height adjusting apparatus includes a light receiving unit for receiving a laser beam for use in setting a hypothetical level which is vertically movably and fitted to a hollow body. A pointer provided for the light receiving unit and a scale plate member indicates the position of the pointer provided for the hollow body. The lower end of a rotary unit is set upright in such a way that it abuts against a base floor to be examined. The light receiving unit is moved up and down so that the laser beam from a laser beam emitter may be received at the center of the light receiving unit. The height of the second floor can be measured by reading graduations on the scale plate member as indicated by the pointer.

Abstract: An arrangement for aligning an apparatus unit with respect to the direction of gravity. The arrangement includes a first support device, a second support device and a third support device acting on a first support point, a second support point, and a third support point, respectively, of the apparatus unit. A measuring level serves to control the alignment of the apparatus unit. The first and second support devices are vertically adjustable. The three support points are arranged in the corners of a triangle. Two separate optically distinguishable partial areas are marked in the region of the measuring level, wherein the first partial area is intersected by a plane through the center of the measuring level extending perpendicularly to the line connecting the first support point and the third support point, and wherein the second partial area is intersected by a plane through the center of the measuring level extending perpendicularly to the line connecting the second support point and the third support point.

Abstract: An apparatus and method for determining the distance of a semiconductor wafer from a nozzle of an edge bead removal system. A rotationally adjustable gap gauge is placed over a vacuum chuck of an edge bead removal system. The gap gauge has a ramped surface which is located proximate to the nozzle when the gap gauge is placed over the vacuum chuck. By rotating the gap gauge on the vacuum chuck, the ramped surface is brought closer to the nozzle. When the nozzle contacts the ramped surface, the position of the gap gauge, as shown by calibration marks on the gap gauge, are recorded. The calibration marks on the gap gauge indicate the corresponding distance that will exist between the nozzle and the backside of a semiconductor wafer when the gap gauge is removed and a semiconductor wafer is placed onto the vacuum chuck. The edge bead removal system is then adjusted such that a desired distance will exist between the nozzle and a semiconductor wafer when a semiconductor wafer is placed onto the vacuum chuck.

Abstract: A target is provided for attachment to a milled locator surface on a machine or to a fixture carrying a part to be machined. A plurality of spaced targets may be used to establish a datum plane. The target has an outer planar flat surface to be engaged by an indicator or used with a laser positioner device. The outer planar flat surface is located at a fixed distance from the milled locator surface, and this distance is usually recorded by indicia on a plate adjacent the indicator or on a cover that covers and protects the target. The outer target surface is parallel to the milled locator surface. To achieve this, the body of the target has inner, planar precisely finished surface that is parallel to the outer planar surface which is on the end of a threaded shaft. The precisely finished, inner planar surface is abutted against the milled surface on the tool or fixture. Anti-backlash springs remove any play from the threaded engagement.

Abstract: Stereoscopic sighting apparatus includes a support plate supporting a pair of sighting members of identical open loop configuration in laterally spaced side-by-side relation to one another at a distance approximating the spacing between a users eyes for generating an overlapping coincident central image of the sighting member when viewing a distant target with both eyes open. A plurality of distance indicator pairs are supported by the sighting members for enabling the user to compensate for distance to target. The sighting members and distance indicators provide an unobstructed view of the target in the coincident central image while maintaining accuracy. Side-mount mounting hardware enables the apparatus to be mounted to a longitudinal midsection of a bow.

Abstract: An assembly for use by a surveyor having a ruler and an apparatus for securing the ruler to a surveyor's pole. The ruler has a retractable tape and a belt clip. The apparatus for securing the ruler to a pole includes a cradle sized to retain the ruler, a stop member, a planar wall member and attachment members for securing the apparatus to a pole. By securing the ruler to a pole, a single person may complete measurements which previously required two people. The tape of the ruler includes measurements which are inverted with respect to the tenth of a foot for easier reading.

Abstract: A device for aiding in the cross-hair alignment of the reticle of a gun-mounted telescopic sight wherein the gun includes at least one mounting boss for securing the telescopic sight. The device includes a card having a viewing surface and a contact edge and at least one reference line located on the viewing surface and also aligned "true" with the contact edge. The contact edge of the card is adapted to be positioned in an abutting relationship with the mounting boss of the gun, independent of the telescopic sight so that the reference line on the card automatically aligns with the barrel axis and so that the viewing surface of the card lies adjacent to the reticle. The relative position of the card abutted onto the mounting boss allows the sighting hairline of the reticle to be compared with the reference line and properly adjusted.

Abstract: A mounting system for optical gun sights comprised of two or more mounting rings each housing eccentric or straight collars supporting the optical sight allowing the optical sight to self center on it axis without binding or deforming the optical sight. The collars, being adjustably eccentric within the ring housing, optionally provide optimal optical alignment of the inner components of the optical sight.

Abstract: A digital tape measure includes a transmitter for transmitting measurements to a remote location. The tape measure includes a housing, a flexible tape having a series of optical markings mounted within the housing, an optical sensor for sensing the optical markings when the tape is extended or retracted, a logic circuit operatively connected to the sensor for providing a digital signal representative of the distance measured, and a transmitter operatively connected to the logic circuit for transmitting the digital signal to the remote location. A receiving unit is provided at the remote location for receiving, storing, and displaying the measurements.

Abstract: An apparatus for measuring and correcting the straightness of a hollow vacuum nozzle for semiconductor assembly equipment comprises a collet which can rotate over 360.degree. and holds the nozzle. An indicator, such as a dial indicator, has a tip which conformally and continuously engages the nozzle so that as the collet and nozzle are rotated the indicator tip rides on the nozzle. Any horizontal movement of a bent nozzle is shown on the indicator. The bend in the nozzle can then be repaired and rechecked while the nozzle is installed in the collet.

Abstract: A collapsible, compound level apparatus is provided and includes a first linear leveling section and a second linear leveling section. Each section includes at least one flat surface for contact with a work surface, and first and second bubble levels arranged for indicating level and plumb, respectively, of the work surface. The first section provides at one end thereof an engagement tongue that engages an engagement groove of one end of the second section, thereby providing colinear interconnection of the leveling sections and forming an integral linear structure for positioning the flat surfaces of each section in mutually coplanar contiguous alignment. The engagement tongue has an oblique surface and an end stop surface for contacting a mating oblique surface and a mating end stop surface of the engagement groove. The oblique surfaces and the mating end stop surfaces of each section form an acute angle.

Abstract: A method and apparatus for certifying a coordinate measuring machine includes a certified ballbar, having a pair of spherical surfaces connected with a bar and having certified diameters separated by a certified distance, that is positioned with a positioning device. The positioning device includes a bar support that supports the ballbar at a midpoint of the bar between the balls, wherein the ballbar is supported free of attachment to the balls. The positioning device includes a first rotational assembly for rotatably supporting the ball support for rotation motion about a horizontal axis and a second rotational assembly for rotatably supporting the bar support about a vertical axis. The first rotational assembly provides rotation of the bar support in a clockwise direction to position the ballbar in a first set of angular orientations and in a counterclockwise direction to position the ballbar in a second set of angular orientations.