Abstract: Miter apparatus for use with a cutting tool having a table top containing an alignment groove. The miter apparatus includes a guide bar adapted to slidably fit in the alignment groove, a head assembly pivotally secured to the guide bar, and a telescopic fence assembly secured to the head assembly. The fence assembly is adjustable in length and includes an inner rail telescopically received within an outer rail, each rail being provided with a retractable workpiece stop which is pivotally mounted on its rail so as to be movable from an operative to a retracted position. A clamping mechanism may be provided for securing a workpiece in position against the guide bar.

Abstract: A measuring device for topographic sheets includes top and bottom transparent arms that pivot relative to a connecting pivot. A plurality of different distance scales on each arm provide for measuring the distance between two points on a topographic sheet. A protractor on the top arm and pointer marks on the bottom arm provide an indication of the extent of rotation of one arm relative to the other. The device is suitable for measuring distance between points, azimuth, scale and position of true north on an aerial photo. A slidable cross-hair member is used on either arm. One embodiment has a protractor affixed to the top arm and another has the protractor rotatable and removable from the top arm. A third embodiment has the bottom arm offset from the center of the protractor and the bottom arm slidable relative to the top arm.

Abstract: The goniometer (1) comprises a scale (203) having three sectors (204, 205, 206) in degrees, grads, and percent. A pointer arrangement (207) is disposed above the scale, and a central arbor bears a handle (208). Fixed in an extension (210) of the handle is a measuring rod (213) which can be used to transfer the angle indicated on the scale to an external item. The pointer arrangement can be locked via a mechanism by a slide (214) disposed in the handle when a locating mark (211is situated over a pointer. The goniometer can be detachably connected to a measuring bar, to which an angle gauge (217) may also be secured.

Abstract: The map reading and plotting instrument comprises two transparent discs coaxially held together by a hollow fastener for rotary motion relative to each other and two transparent arms disposed between and extending radially of the discs and secured by the hollow fastener for pivotal movement relative to each other and the discs. The top disc has a sight-slide subassembly consisting of a plurality of first scales of linear measure and a sight-slide moveable relative to the first scales. The bottom disc has adjacent its periphery a plurality of scales of angular measure while each of the arms has a plurality of scales of linear measure extending from the hollow fastener longitudinally to the distal end thereof. The top disc has a north-south diametral line which coacts with a declination scale of the bottom disc to effect orientation of the instrument with the magnetic north as shown on a map having grid azimuths and/or a declination diagram.

Abstract: An reversible adjustable pivot angle square (10) comprising a a base blade (20) that contains a reversible level and plumb means (62) rotatably connected to a perpendicular travel blade (22) that contains a reversible level and plumb means (64) in an arrangement that forms an adjustable orthogonal position. The travel blade (22) design allows rotation to a 360 (three hundred and sixty) degree range. An angle blade (26) is angularly and rotatably connected to the base blade (20) at approximately mid center of the base blade (20) elongation. The base blade (20) design allows rotation to a 360 (three hundred and sixty) degree range. The travel blade (22) contains a through slot which runs substantially along the travel blade (22) elongation. The through slot serves as a travel blade slot (24) for the angle blade (26). Once the angle blade upper end (38) is slidably and adjustably connected to the travel blade slot (24), the adjustable pivot angle square (10) is completely pivotally and rotatably connected.

Abstract: An improved guide apparatus for replicating angles of the type having a main member with a straight edge, a bubble-level device on the main member, and an angle arm pivotably attached to the main member. A slot in an end of the main member receives the angle arm, and a bolt which extends through the main member and the angle arm to form a pivot point has a hand-tightening nut or the like on it for quick angle replication in direct and reverse angle situations without additional tools. In some preferred embodiments the slot extends through the entire main member and/or the opposite surfaces thereof are tapered at the pivot connection to facilitate tightening even though the main member is of substantially rigid construction.

Abstract: A system and method for determining cutting lines for cabinet top joinery without measurement of angles apparatus for apparatus for positioning against walls between which a cabinet top is to be installed and a transfer device for establishing a distance between a selected points on the apparatus. A saw guide incorporates a linkage arrangement adapted for mating with the transfer device so as to establish a cutting angle which bisects the angle of intersection of the walls. Another mechanism is provided to automatically determine offset cutting angles using only the transfer device.

Abstract: An angle guide device has a pair of arm members which are adjustable through a range of angles to engage adjacent edges at the corner of a piece of mat board. The device is adapted for mounting upon a triangular guide member in a mat cutting machine, and to be secured in each of a multiplicity of positions along the length of the guide member.

Abstract: A biplane goniometer including a platform having a first planar surface thereon. An indicia mark on the side of the platform is disposed in plane parallel to the first planar surface. A flexible, stable arm is pivotally attached to the platform and the stable arm is disposed in a plane substantially perpendicular to the first planar surface. The stable arm has a reference line disposed longitudinally thereon. Measuring data, including calibrated numbers, is disposed on the stable arm in an arc about the axis for measuring the arc between the indicia mark on the platform and the reference line on the stable arm.

Abstract: A multifunctional tool having elements adapted to function as a level, bevel, protractor, square, and scale. Indicia are inscribed on mutually rotatable components of the tool for determining a mitre. The tool may include a magnet on the base to hold it in position on a metal surface.

Abstract: A protractor quadrant tool accessory is provided and consists of two arms attached pivotally together at one end, degree calibrations so that the angle between the arms is readily read and a locking device whereby the angle between the arms can be maintained fixed so that the protractor quadrant tool accessory can be used by a machinest and carpenter to measure angles on various articles. In a modification stud guides attached to outer parallel straight edges of the arms can stabilize the tool accessory when measuring the stairways stud angles and the like, used as an isometric center finder and making equal and opposite converse lines upon a stud. In still another modification an adjustable trimitre is slideably locked upon one arm so as to stabilize the tool accessory when measuring the stud angles and the like to be cut.

Abstract: A chalk line framing square is provided to aid in placing right angle intersecting chalk lines upon a floor so that tiles can be properly installed on the floor. The framing square can check the squareness of the tiles as they are installed without being placed in the adhesive.

Abstract: An adjustable carpenter's square is formed by having a main beam with a head secured to an upper portion of the main beam with a slide secured to the upper end of the main beam. The head and the slide are partially rotatablely secured to the main beam. The head and the slide are slideably and adjustably connected to each other also in addition to being connected to the head.

Abstract: The angle gauge employs pivoted, straight edge arms having indicia therealong to determine length of the arms of bent or angled material as measured from the virtual apex of the angle of bend regardless of the radius of bend. Angle indicia is also provided at the pivot for determining the angle of bend.

Abstract: A graphics protractor (10) for placement on a computer display screen (52) to determine direction changes for graphics commands has a circular ring (12) bearing indicia (14) representing relative angles with respect to a point (16) of origin on the ring (12). First and second sheets (18,20) through which display screen (52) is visible are rotatable with respect to the ring (12). The sheets (18,20) each have a straight line (44) movable into and out of registration with respect to the straight line (44) of the other sheet (20,18) by rotation of the sheets (18,20) within the ring (12). The sheets (18,20) have a graphics symbol (28) centrally located with respect to the ring (12), which is placed over a corresponding graphics symbol (50) on the computer display screen (52) to use the protractor (10).

Abstract: A pivot assembly for a guide or marking tool (10) comprising a stock (12) with a reference edge (31) alignable with a desired datum (36), a blade (13) with a sighting, guiding or marking edge (16) and a semi-circular segment (18) provided with angle indicia (19). The stock (12) is pivotally connected to the blade (13) so that the angle between the reference edge (31) and the sighting edge (16) may be adjusted to a predetermined setting and the pivot axis (9) of the stock (12) relative to the blade (13) is located at the intersection between the reference edge (31) and the sighting edge (16) at all relative angular settings between the stock (12) and the blade (13). Pivoting of the stock and blade is effectuated by arcuate guide tracks on the stock (12) mating with corresponding depending flanges on the undersurface of segment (18).

Abstract: A portable precision guide for powered hand tools is formed having a base plate with a protractor portion and a table portion, a guide bar on one surface of the base plate guides a powered hand tool on the table portion and an angle arm pivotally mounted on the other surface of the base plate can be positioned by said protractor at a desired angle with said guide bar to position a workpiece for cutting. Said base plate has openings for holding said workpiece therethrough against the angle arm; the workpiece can also be marked where desired through said openings.

Abstract: An improved miter gauge having means for establishing the angle of a workpiece relative to a tool such as a table saw, with increased resolution and accuracy. The miter gauge includes a guide bar adapted to slidingly engage a groove in the tool. A reference frame having a flat surface against which the workpiece is held, is pivotally mounted on the guide bar. A rotatably mounted angle index dial, graduated to show the miter angle at which the gauge is set, is turned by two intermeshed gears as the reference frame is pivoted about its mount on the guide bar. The intermeshed gears are operative to rotate the angle index dial through a greater angle than the miter angle by a six-to-one ratio to increase the resolution with which the miter angle is set. For example, a 15.degree. change in the miter angle results in a 90.degree. rotation of the angle index dial. Two embodiments show alternative ways to attach one of the gears and angle index dial to the guide bar and reference frame.

Abstract: An angle-measuring instrument which includes two arms, which are interconnected in such a way that they can be pivoted about a common shaft, and an indicator for the angle of spread of the two arms. The shaft is rigidly connected with one of the arms, and drives the drive gear of a transmission gearing which is arranged in the at least partially hollow second arm. As a function of the angular position of the two arms relative to one another, the transmission gearing moves the indicator, which is also disposed in the hollow second arm, and in the indicating region of which a viewing window is arranged in the hollow second arm.

Abstract: An elongated body is provided including opposite side portions removably secured together by transverse threaded fasteners. One set of corresponding ends of the side portions include relieved areas opening toward each other defining a cavity opening outwardly of the corresponding end of the body and along one longitudinal edge thereof. A protractor arm is pivotally mounted within the notch for movement between a retracted position received within the cavity and extending along the one edge and an extended position disposed at substantially 90.degree. relative to the elongated body. The body and protractor arm include coacting structure for adjustably limiting angular displacement of the protractor arm to the extended position and the ends of the opposite side portions of the body remote from the protractor arm include two pairs of opposing sockets formed therein in which spirit level supporting annular bodies are mounted.

Abstract: A electro-mechanical device for measuring the angle made by two rotatably joined members comprising a pair of rotatably connected elongated arms and electrical circuit means mounted on one of the arms and associated with the rotatable pin connector of the arms. The circuit, powered by a battery, encodes the angle of the pin preferably via a potentiometer and transmits the information to a decoding device, preferably a voltmeter, and then to a digital display device also mounted on one of the arms.

Abstract: A multifunction, multipurpose construction tool comprised generally of two operating arms pivotally connected via their terminal ends, preferably their rounded terminal ends, one to the other, an angle indicator being provided at the pivotal connection, or hub, for reading the angle formed by the two arms. A pair of alternately disposed abuttments are located at the extremities defining the rounded end of one of said arms as well as the beginning and end of the scale of angular component values of the scale. A stop located on the rounded terminal end of the other pivotally connected arm provides a means for indexing the scale of angular values between said alternately disposed abuttments.