Abstract: A prism assembly and sighting target which are omni-directional in azimuth and which provide a plurality of prisms dispersed symmetrically around the radial wall of a cylinder for reflecting incident laser light from any direction over 360 degrees in azimuth. A uniquely shaped sighting target for use with the prism assembly of the invention provides a visible target pattern from any direction over 360 degrees in azimuth. A cylindrical housing portion of the invention provides receptacles for receiving six prisms spaced at 60 degree intervals so that irrespective of the angle of azimuth from which the laser light is incident, a sufficient amount of light energy is reflected back to the laser light instrument to permit distance measuring over a pre-selected minimum distance.

Abstract: An indicator used for monitoring whether or not a cooled or deep-frozen product has exceeded a preset critical temperature. The indicator includes a hollow shape which is symmetrically divided by separating walls. This structure allows the indicator fluids to be placed on a circular radius within the hollow shape. This design also exhibits a special centrifugal axis. This axis allows the fact that the products have reached the critical temperature to be disclosed in the following manner: the indicator fluids melt and move away from their resting place in the hollow shape. If the fluids are re-frozen, they can not return to their prior resting place because the fluids arrived at that original resting place due to centrifugation. Thus, departure from the fluids' centrifuged state gives notice that the products have reached their critical temperature.

Abstract: An illumination device includes a light source; a secondary light source forming system for forming predetermined secondary light sources by use of light from the light source, the secondary light source forming system including a plurality of lens array units disposed in the direction of an optical axis and each having a plurality of lens elements distributed in a plane perpendicular to the optical axis; an optical system for directing light from the secondary light sources to a surface to be illuminated; and an actuating device for displacing at least one lens array unit in the direction of the optical axis to adjust the illuminance distribution on the surface being illuminated, while maintaining a substantially constant range of illumination on the surface being illuminated.

Abstract: An optical apparatus wherein an image is to be focused onto a generally rectangular projection surface through a projection lens and wherein a focal state at a particular location of the projection surface is to be detected to move the projection lens on the basis of the result of detection of the focal state, a method of automatically controlling the focal point of the projection lens, characterized in that, when it is found that the focal state of the particular location of the projection surface can not be detected, a focal state at another location of the projection surface is detected to move the projection lens with respect to the projection surface on the basis of the result of the detection at the other location.

Abstract: Apparatus is described for the detailed viewing of a strip of 35 mm slide film which is enclosed in a transparent jacket. The apparatus includes a projector with a film gate which is wide enough to pass the jacket, and which projects sufficient area to include the frame number which lies under each picture frame. The apparatus enables a person to view the details of a developed roll of slide film, in its jacket, and to select particular frames for making prints or mounted slides.

Abstract: The tape measure includes a lock for locking the tape in an extended position from its case. The lock includes a toggle pivotably mounted on the case and a lock shoe extending from one end of the toggle to a position adjacent the tape. The case includes guides, such that when the toggle is depressed, the lock shoe is forced against the tape so as to wedge the tape between the lock shoe and the case to prevent its retraction.

Abstract: A scanner head for a tooth-flank scanning device for testing and measuring of gears and similar parts, in particular of gearlike tools having abrasive tooth flanks, is adapted to be introduced into a tooth space of the respective gear or similar part and which can be guided along one of the tooth flanks bordering the tooth space. The scanning piece or insert is formed by the convex surface of a spherical segment, the radius of which is substantially greater than the radius of a ball introducible into the tooth space.

Abstract: A guide-pin for use in tracing templates and stencils, having a first portion, a second portion and a third portion, the guide-pin having a single piece construction. The second portion and the third portion extend in a common plane and hold the first portion perpendicular to the common plane. The first portion is inserted vertically into a pantograph arm opening. The second and third portions are secured against the pantograph arm.

Abstract: A thread gaging device has three thread gage rollers mounted 120 degrees apart from each other. Two horizontal arms extend outward from the base. One of the rollers mounts to one arm and the other two rollers mount to the other arm. The two rollers on the one arm can slide horizontally relative to each other to select the positions. Also, the two rollers can be repositioned vertically relative to the other roller to a selected position. The front of the rollers is pivotal relative to the base. An indicator will measure the amount of pivotal movement to gage a threaded fastener inserted between the rollers.

Abstract: A device for measuring and determining the condition of wheel position and alignment in a unibody automobile, include wheel setback, toe-in, toe-out, front end squareness, camber, caster, wheel base, tram, and tracking in a simple single configuration tool. The basic instrument is a fixture that installs on each wheel within the perimeter of the wheel, and includes angle measuring and distance measuring arms that interplay geometrically to diagnose each required wheel/body condition. Simple mechanical rulers and levers are all that is necessary for use.

Abstract: A saw mill guide rail capable of being quickly, easily and accurately aligned to the saw blade, having two intersecting surfaces machined into the head of the rail, each parallel to the rail head length and extending for the length of the rail, one being vertical and the other being horizontal, to thereby form a line of intersection, such that a straight-edge can be positioned against one or both said planar surfaces at the line of intersection to align the rail in a straight line in either or both the vertical and horizontal plane.

Abstract: An immersion probe as a preassembled unit includes a measuring head having a measuring element protected for minimizing trapping of gases by a sheath. The sheath is tapered toward a free end. The probe is adapted to be immersed in molten metal for measuring temperature and/or oxygen content.

Abstract: A combination plumb/level device for removable attachment to a try square of magnetizable material to enable the square to be used as a level or a plumb. The device comprises a spirit level, and a holder for the level. The holder has a magnet associated therewith for magnetically gripping one face of a standard, unaltered leg of the try square with the level oriented relative to the face. The magnet associated with the holder is engageable with an edge of the standard, unaltered leg and orients the level with respect to the edge, enabling flatwise application of the other face and edges of the try square to a surface whereby the try square may be used to ascertain level or plumb positions. Other embodiments, including those directed to a device adapted for removable attachment to a try square of non-magnetizable material, are also disclosed.

Abstract: The volume of the housing of a rear-projection system can be reduced by 20 to 25% when the light beam is obliquely incident on the projection screen. The obliquely incident light beam is deflected towards the viewing space by means of a prism plate (731). By dividing the light-refracting action of the prism plate between the front and rear of the plate only minor light loss occurs.

Abstract: An archery bow sight mounting device having a mechanism means for adjusting the vertical launch trajectory of an arrow through an angle of ten degrees or more in closely spaced steps of 20 minutes of arc, or less, having structure to inhibit an accidental misadjustment, and having indica for calibrating range with respect to each adjustment. Structure is also provided for adjusting the transverse launch trajectory angle to compensate for variations between bows or archers.

Abstract: A fireman's coat of the type which has an outer shell and a detachable liner for the outer shell and side pockets formed in opposite sides of the outer shell also has visible indicator patches on each side in close proximity to the open end of each pocket. The indicator patches have a sufficient extent to be clearly visible from the front, back and sides of the outer coat when the coat is worn by a fireman in use. A narrow opening is formed in each side of the outer shell in close proximity to the open end of each pocket. A pocket flap is attached to each side of the liner so that it can extend through one of the narrow openings formed in the sides of the outer shell. Velcro fasteners are provided for securing each pocket flap in an outwardly overlying relationship with respect to the outer shell to close the open end of its associated pocket and to overlie and obscure the visible indicator patches associated therewith to clearly indicate that the liner is located in the outer shell in use.

Abstract: A system for painting images of stars and other objects on the interior surfaces of a room with phosphorescent paint utilizes a projector to project symbols on the surface to indicate locations of points to be painted. The projector is adjustable to accomodate rooim size and position of the viewer.

Abstract: A flexible CNC-multiposition measuring installation, which represents a combination of components from the coordinate measuring technique with elements from the multiposition measuring technique and the counter testing technique, which are joinable with each other in a common measuring installation. Such CNC-multiposition measuring installation are, in particular, adapted for the integration thereof into a manufacturing or production process.

Abstract: A position measuring device for measuring the relative position of two objects (01, 02) comprising a graduation (Ta) in a graduation plane (TFa) of the graduation carrier (TTa) which is connected to one of the objects (01). The object (01) is scanned by a scanning unit (A) which is connected to the other object (02) by means of a carrier (MT). Between the carrier (MT) and the scanning unit (A), a coupling link (K), preferably in the form of a leaf spring, is aligned in the direction of measurement X. This spring has only one rotational degree of freedom in a direction perpendicular to the graduation surface (TFa) of the graduation carrier (TTa). A guide mechanism (F) comprises a guide element (FE) which guides the scanning unit (A) in a direction parallel to the direction of measurement X on a guide surface (FFa) of the graduation carrier (TTa). The guide surface (FFa) is perpendicular to the graduation surface (TFa) of the graduation carrier (TTa).

Abstract: The invention concerns a transparency overhead projector having an illumination unit of which the height has been extremely reduced. The main component of the illumination unit is a specular surface comprising mutually parallel, mirrorized prismatic shoulders either on its top or on its lower side, which reflect the light from at least one lateral source toward the Fresnel lens, the platen and the projecting lens. The specular surface may be plane, however it may also be curved in circular, hyperbolic etc. manner in the longitudinal direction of the prismatic shoulders. This curvature may be constant or it may vary. Further, the specular surface also may be twisted, that is, it may also be curved in a direction orthogonal to the prismatic shoulders, and this curvature also may be constant or variable.