Abstract: An improved fluxgate instrument for measuring heading as well and pitch and roll angles is disclosed. A plurality of fluxgate sensors are continuously energized with a DC feedback signal derived from the reading of each sensor so as to minimize magnetic cross-coupling between the sensors. In addition while two sensors are gimbally mounted to sense the horizontal components of the earth's magnetic field, the vertical field is sensed by two sensors strapped down relative to the instrument casing for sensing the earth's vertical magnetic field in order to compensate for latitude. Finally, sine and cosine coils surround the gimbally mounted sensors and generate AC fields which are sensed by the gimbally mounted sensors and are used to calculate the pitch and roll angles.

Abstract: A sensor for an incination measuring device which comprises a capsule (3) part-filled with a conductive liquid. First to fourth electrodes (A-D) are disposed within the capsule in contact with the liquid. An electrical signal is applied between electrodes (C, D) and one then the other of electrodes (A, B), to derive a signal indicative of the degree of immersion of the electrode (A), and then the electrode (B) within the liquid. The ratio of these signals is related to the angle of inclination of the capsule about the reference axis (O) and relative to a first reference angle defined at the gap between the electrodes (A, B). The capsule (1) is also constructed to compensate for thermal effects, by forming the sides of the capsule so that they are responsive to pressure change within the capsule caused by thermal expansion of the contents of the capsule to expand the volume of the capsule, to keep the level of liquid therein constant.

Abstract: An archery bow sight is disclosed having a tubular member within which are plate members disposed in intersecting planes. Sight components are of transparent plastic having a fluorescent dye dispersed therein. The tubular member and plate member surface areas absorb light waves and conduct the waves to their respective edges to provide a brilliant reticle for use in low light conditions without reliance on artificial light sources. The mounting plate receives a base of the sight in an adjustable manner. Ultraviolet light waves are converted by the sight into visible light waves.

Abstract: An apparatus and method for approximating a workpiece contour. The conformable tool includes a support plate having a plurality of apertures and a two dimensional arrangement of a plurality of pins, each of which is slidably disposed within a corresponding aperture of the support plate. A plurality of locking members works in concert to simultaneously lock the plurality of pins in position once the pins have effectively approximated the contour. The conformable tool is pressed against the three dimensional contour of the workpiece so that each pin is displaced in response to the workpiece contour. The pins are then simultaneously locked in place by the locking members and the conformable tool is removed from the workpiece contour so that the conformable tool can be used as a forming base to reproduce the workpiece surface.

Abstract: A level/protractor tool which includes two or more sections pivotally joined to facilitate angular displacement. One or more sections house level-indicating spirit vials. Angular displacement indicia marks are imprinted on each section at its juncture with an adjoining section to visually indicate the degree of angular displacement between adjacent sections.

Abstract: A device for measuring the dimensions for locating multifocal segments on eyeglass lenses. A chinrest is provided for maintaining the stability of the patient's head while the proper location of the multifocal segment is determined, and an eyepiece is provided through which the dispenser may look at reference points on the face of the patient and the patient's new eyewear to measure the required dimensions. The eyepiece is then moved along the vertical axis of the post to which it is mounted, and the distance traveled by the eyepiece between the reference points is measured by a measuring device found on the apparatus.

Abstract: A device for measuring a linear dimension of a component includes a shaft, a worktable base for supporting one end of the shaft, and an end plate for supporting the other end of the shaft in spaced relation to a surface of the worktable. The device also includes a saddle movable along the shaft between the worktable base and the end plate. The worktable base includes a first support table, and the saddle includes a second support table, co-planar with the first support table. Each support table has a removable measuring pin extending upwardly at an angle substantially normal to the surface of the table. The support tables have a configuration designed to support at least a portion of the component in engagement with a respective measuring pin over a wide range of pin separations. A linear scale measures the linear displacement of the measuring pins and provides an indication of the linear dimension of the component.

Abstract: An improved gage for measuring the diameters of threaded members comprises a frame having two platforms extending therefrom, and a support member mounted to the frame for receiving threaded members to be measured. A gage member having a plunger is mounted to a first platform, a measuring shaft is mounted to a second platform, and a lever arm is pivotally mounted on a fulcrum member mounted to the frame. A first end of the lever arm is in contact with, but not physically attached to, an end of the measuring shaft. A second end of the lever arm is in contact with, but not physically attached to, an end of the plunger of the gage member. A mechanical relationship is defined between the plunger of the gage member, the measuring shaft, and the pivotally mounted lever arm that permits the gage member to directly measure the diameter of the threaded object.

Abstract: A sight apparatus includes a mounting plate, with the mounting plate including a plurality of U-shaped loops mounted thereto, with the second of the U-shaped loops including spaced parallel grooves coextensive therewith to secure crossed spring lines that are repositionable along their ends relative to the grooves for adjustment of the lines relative to a sighting procedure.

Abstract: A gauge structure is arranged to provide for the immediate measurement of a case length prior to a reloading procedure and subsequent to the reloading procedure to measure the case length and associated bullet member seated therewithin. The structure is arranged to accommodate various calibers and bullets of various gauges and associated sizes therefore. A case housing to include positioning of various of the gauges therewithin in association with a magnification lens arranged for mounting relative to the housing for enhanced ease of visual inspection of the cases and assembled cartridges is provided.

Abstract: A system for measuring an inputting range of motion data to a computer comprises a goniometer for measuring range of motion and for producing a range of motion signal from those measurements. A plurality of switches are carried by the goniometer for producing control signals. An interface device receives the range of motion signal and digitizes that signal to produce range of motion data. The interface device also receives the control signals which are used to control the input of the range of motion data to the computer.

Abstract: A "U" shaped clip member is arranged for resilient mounting to contiguous construction studs, wherein the clip member includes spaced parallel plate legs biased towards one another fixedly and orthogonally mounted to a base plate. The base plate includes a "U" shaped channel extending exteriorly of and projecting orthogonally relative to the base plate to define a channel spacing between the channel projection and the base plate to receive a hammer head projection to permit efficient removal of the clip member subsequent to its use in the securement and alignment of construction studs relative to one another.

Abstract: A combined sighting and stabilizer device for an archery bow is set forth which includes a support body having a vertical axis, a pair of framing arms which are oppositely and laterally spaced from the vertical axis and in one embodiment of the invention extend rigidly from the support body to frame a target region which has sufficient area to permit an arrow to pass through the region. A stabilizer arm extends perpendicularly from the target region and is carried by the support body. The stabilizer arm has a threaded end which threads into the standard stabilizer bushing of the archery bow riser. A lock nut which is carried on the threaded end of the stabilizer arm is utilized to align the vertical axis of the support body with the vertical axis of the archery bow. In another embodiment of the invention, the framing arms are adjustably and slideably mounted to the support body such that the area of the target region may be varied.

Abstract: A display system for conventional eyewear having a transparency that defines a field of view and a frame for supporting the transparency on a user's head is shown. The display system includes a light transmissive display mounted on the frame of the eyewear and optics for collimating light to project an image of the displayed information at a distance from the user in the periphery of the field of view defined by the transparency. The optics may include a single mirror that receives the information directly from the display wherein the mirror is toroidal or the like so as to project an enlarged image at an apparent optical distance from the user that is greater than the actual optical path. Alternatively, a planar mirror may be employed with a collimating lens to project the image at a desired distance from the user. The mirror may be fully reflective or partially reflective so as to superimpose the image of the displayed information on the scene viewed by the user through the transparency of the eyewear.

Abstract: A device for centering geodetic instruments over defined ground marks or defined position marks is described, in which a visible light beam is projected onto a ground mark or position mark. In an advantageous additional feature, the light beam of the invention can be used to measure the distance between the sighting line of the geodetic instrument and the sighted ground mark or position mark.

Abstract: A rear peep sight apparatus for use with a bow includes a body formed of a transparent material for mounting in a bow string. The body has generally parallel front and rear surfaces connected by a curved side surface and the side surface and a portion of each of the front and rear surfaces is opaque. The body has a cavity formed therein for mounting a light source which is connected by a spiral wound elastic conductor to a battery and switch enclosed in a housing which can be releaseably attached to the bow. The peep sight can include sighting means such as, for example, an oval ring, a dot and a cross hair. In the alternative, the light source can be located in the housing and the light transmitted through a fiber optic conductor to the body.

Abstract: Axle alignment for a tractor-trailer vehicle combination is important for tire wear, fuel economy and driver fatigue. Misalignment occurs when the tractor thrust line vectors (one perpendicular to each drive axle) has a skew angle with respect to a longitudinal reference axis of the tractor. In addition, the tandem axles of a dual axle combination must be parallel to minimize scrubbing between the tires and the roadway. The same problems exist when the trailer drag line vectors (one perpendicular to each trailer axle) are not aligned with a longitudinal reference, and the dual axles are not parallel, due to axle misalignment.The instrument and method of this invention are components of an alignment system for making accurate alignment adjustments to the vehicle. The instrument is compact, light weight and portable. Also, only one instrument is required to establish location points on the reference surface supporting the vehicle.

Abstract: A system for positioning and blind marking construction material panels includes clips designed to support marking projections relative to installed construction components such as electrical outlet boxes and frames for windows and doors. A leg flexure of each clip is used to secure the clip to thin walled components. Each of the clips further has alignment projections that abut the component edges, for securely positioning the clips. The flexure legs break away to enable use of the clip on thick walled components, with an adhesive retaining the clip in lieu of the leg flexure. The system further includes stabilizers for aligning an unsecured panel in parallel spaced apart relation to a previously installed panel, thus to edge-align the panels for precise placement of markings on an inside surface of the panel to be installed.

Abstract: Briefly stated, the present invention provides a level with a ball rolling on inclined surfaces, the level comprising a window through which the ball can be observed. Reference marks are positioned on the window so as to indicate the horizontal and/or vertical positions of a reference line visible through the window. The level has two spaced transparent lenses or glasses between which the rolling ball is disposed. These can be flat or convex; and if convex, a centrally located reference mark can be provided which indicates the inclination of a surface on which the level rests on its side, that is, with the line of sight through the lenses disposed vertically. This same reference mark, when the lenses are not convex but rather flat, can serve as a target mark for helping to aim the level.

Abstract: A scale, particularly for a position measuring device, includes a base member and a graduation carrier with a graduation which is fastened with an adhesive layer to the base member. In order to prevent an at least partial separation of the adhesive layer from the contact surface of the base member, the adhesive layer extends in a positively engaging manner with a projection in a dovetail-shaped groove in the contact surface of the base member, so that a secure adhesion of the adhesive layer on the contact surface of the base member is ensured.