Abstract: A reusable template is disclosed herein for use in cutting pipe and other related applications in conjunction as a guide for an oxygen cutting torch. The template, as described in a preferred embodiment as a pipe template, has one or more contour ends so configured that after the branch pipe is cut it will fit flush against the external surface of a header pipe at the desired angle determined by the configuration of the contour end. The template is made of oxidation resistant material, with an alloy content sufficient to produce refractory oxides when heated by a flame, thus preventing the template from being cut by the oxygen cutting torch. The template is held in place over or on the workpiece or pipe by means well known in the art. The contour end or shape of the template is used as a guide for the nozzle of a standard oxygen cutting torch.

Abstract: A polyfunctional spirit-level comprising a four-sided, elongated spirit-level body containing a bubble tube, axially disposed therein and adapted to be viewed from above when using three of the sides, two sides adapted for use as a level and two side adapted for use as a declination indicator for different slopes of sewer lines, said level small enough to be slipped in one's pocket and carried on one's person.

Abstract: Mounted on a carriage movable through a pipeline is a shaft which carries a wheel held against the inner surface of the pipeline. The shaft is arranged so that it can reciprocate transversely of the pipeline as the diameter of the latter varies, and a pen mounted on the shaft marks a line on a recording sheet which is secured to a drum mounted on the carriage and arranged to rotate as the latter travels through the pipeline.

Abstract: This discloses an improved sine bar for accurate measurement of angles for machining operations, and methods of its use. This comprises a rectangular elongated base member, projecting from opposite ends of which are cylindrical connecting rods. A conforming reference bar is hingedly connected to the base member, and has a cylindrical bearing pin fastened beneath one end. When the sine bar is open to accommodate one or more calibrated gauge blocks, a spring-biased chain keeps the gauge block(s) in position between the base member and the bearing pin. A recess in the base member permits measurement of small angles. This device is especially adapted for use in setting up a lathe compound to calibrated angular positions, but is also useful for other types of milling and machining operations in which the sine bar rests on a flat surface.

Abstract: In a slide gage, a slide (16) is guided displaceably by means of four sliding elements (30, 32, 34, 36) arranged in pairs on both sides of a guide rail (10). The two sliding elements (32, 36) located diagonally opposite one another and absorbing the torque transmitted to the slide (16) by a measuring leg (18) during a measuring operation are supported rigidly on the slide, while the remaining two sliding elements (30, 34) are supported resiliently on the slide. This guarantees both a high measuring accuracy and easy movability of the slide (16) on the guide rail (10).

Abstract: An apparatus for determining deviations of a circular form of a dynamically balanced part characterized by a spindle which can be set in approximate alignment with the axis of the unit under test, an interval sensor rotated around the spindle axis for radially sensing a circumferential surface of the unit under test and electronic signal processing unit for separating a deviation signal component of the sensor signal created by a deviation from the circular form that is detected from other signal components of the sensor signal which are created from an eccentric setting of the spindle with respect to the axis of the unit under test. As a result of such a signal analysis, errors occurring from the eccentric spindle setting are practically avoided. Thus, no high demands are made for the spindle setting when making, for example, a roundness check of a steel pipe.

Abstract: A method for marking a fabric for sewing, cutting, or the like includes placing a plurality of markers on the fabric at positions instructing how the fabric is to be manipulated. The markers are differentiable according to the instructions to be conveyed, are adhesively backed, and are distinguishable from the fabric when applied. A sewing aid includes a plurality of such markers.

Abstract: A bow sight for attachment to an archery bow for use in combination with a sight mounted on a bow string, the bow sight utilizing a variable light source as an aiming reference which source is connected to a power pack and variable resistance, wherein the intensity of the light source can be adjusted according to the conditions facing the archer.

Abstract: An improved Roots-type blower (10) and fixture (200) for timing rotors (20, 22) and timing gears (36, 38) of the blower during assembly. The blower includes a housing (12) defining generally cylindrical chambers containing the rotors having meshed, helical lobes (20c, 22c). The rotors are fixed to stepped diameter shafts (24, 26) pressed into stepped bores (20d, 22d) in the rotors. Straight splines on the shafts respectively form mating splines in the rotor bores and in the hub bore of timing gear (36). In a modified form of the blower, the straight splines form matting splines in both timing gears. The shafts are supported in the housing by fixed ball bearings (28, 30) at one end of the rotors and at the other end by ball bearing (32, 34) resiliently biased by springs which preload all four bearings. The fixture includes a base (202) having two surfaces (202f, 240a) for supporting ends (20b, 22b) of the rotors.

Abstract: The periphery of a selected crankpin is ground while the crankshaft rotates about an axis which is parallel to the axis of the crankpin. The decreasing diameter of the crankpin is monitored by one or more sensors which are connected with a detector serving to transmit signals to the controls of the grinding machine. Retention of the sensors in continuous contact with the circulating crankpin is ensured by an elongated guide which supports the sensors and the detector and is mounted on the piston rod of a cylinder. The latter is pivotable in a holder which is reciprocably or fixedly secured to the table or to the understructure of the frame of the grinding machine. A coil spring in the cylinder biases the piston and the piston rod in a direction to maintain the forward end of the guide in continuous contact with the periphery of the circulating crankpin.

Abstract: An adjustable T-square apparatus comprising a generally triangular frame having first and second working surfaces normal to each other and a third working surface at a 45.degree. angle to the first and second working surfaces is disclosed. The apparatus further comprises three level vials mounted on the frame in parallel relation to separate working surfaces. A pair of measuring blades are slidably mounted on the frame in parallel relation to the first and second working surfaces.

Abstract: An apparatus for measuring the thickness of a tube's wall for the tube's entire length and circumference by determining the deviation of the tube wall thickness from the known thickness of a selected standard item. The apparatus comprises a base and a first support member having first and second ends. The first end is connected to the base and the second end is connected to a spherical element. A second support member is connected to the base and spaced apart from the first support member. A positioning element is connected to and movable relative to the second support member. An indicator is connected to the positioning element and is movable to a location proximate the spherical element. The indicator includes a contact ball for first contacting the selected standard item and holding it against the spherical element. The contact ball then contacts the tube when the tube is disposed about the spherical element.

Abstract: A tread depth probe for measuring the depth of a tread groove in a tire comprising a retaining and release mechanism to retain the probe pin in a retracted position when not in use and a release mechanism to release the probe pin when in use and having a measuring system permitting multiple tire groove depth readings while permitting the tread depth probe to be in the released position.

Abstract: The present invention provides a guide for constructing brick corners in which the corner is constructed from a plurality of stacked brick layers which are spaced apart from each other by a joint. The guide includes at least one guide bracket having two wall sections which intersect each other at the same angle as the sides of the corner and the bracket is positioned against a partially constructed brick corner so that the wall sections flatly abut against opposite sides of the corner. A lip is formed along the top edge of each wall section and the lips are positioned on top of the top row of brick in the partially constructed corner. Several further rows of bricks are then laid on the corner so that the lip, and hence the guide bracket, is trapped within the joint between two brick layers. A pair of elongated rails are secured to the bracket so that the rails extend vertically and parallel to the corner.

Abstract: A template-like gauge has a plate-like body which is at least in most part transparent and carries a reference point and a first plurality of parallel lines along with a read-out portion which in turn is made-up of second and third pluralities of lines to cooperatively define a plurality of gauge areas, each of the gauge areas represents a different set of coordinates for aiming an associated X-ray source; an additional plurality of radiating angularly spaced gauge lines are also provided; when the plate-like body is placed against a lateral cephalogram and the reference point is situated at the articulare and the palatal plane of the cephalogram is positioned at least parallel to one of the lines in the first plurality of parallel lines, the sella appears in one of the gauging areas and the coordinates corresponding thereto are employed for aiming the X-ray source.

Abstract: An inscriptive device for a tape measure. The inscriptive device is internally mounted on the tape measure and allows the user of the measure to form a mark on the surface of a workpiece at a point immediately beneath the tape measure.

Abstract: A coordinate measuring instrument wherein a measuring element is related to a work to be measured, and a configuration or the like of the work is measured from a displacement of this measuring element. In this measuring instrument, one of supports is supported by one of guide rails in a manner to be positionally adjustable in direction of X- and Z-axes and the other of the supports is supported in a manner to be displaceable only in a direction of one of the guide rails. A slider guide rail racked across the supports can be adjusted in its posture in the direction of X- and Z-axes by a posture adjusting mechanism provided on connecting portions between the slider rail and the supports. The slider guide rail thus adjusted in posture in non-displaceable in the moving direction of a slider in a state where adjustment members provided on the slider guide rail are closely abutted against abutting surfaces of the supports.

Abstract: Apparatus for Levelling a surface, such as a table, includes several bellows containing a fluid connected to the surface, conduits connecting the bellows together and a control valve for connecting or disconnecting the conduits, the control valve being located in a chamber and being separated from an actuator by a diaphragm.

Abstract: A bow sight 10 is adapted for use with an archery bow 14 provide targeting accuracy. The bow sight 10 includes a frame portion 18 having channels 26 at the outer edges thereof adapted to secure the bow sight 10 between strands of the bow string. The frame portion 18 also has a relatively large open central area 20. Front and rear inserts 30, 32 integrally molded within the frame portion to provide strength and rigidity to the bow sight 10, and have relatively large central apertures 34, 36 extending therethrough. The large open central area 20 of the frame portion 18 and the large central apertures 34, 36 of the front and rear inserts together define a composite window 38 through which the archer may view the target. An aiming dot 40 is secured by means of arms 42 within the central portion of the composite window to provide an aiming point within the archer's line of vision.

Abstract: An apparatus for checking the roundness of parts comprises a basement supporting a motorized spindle for rotating the part to be checked about a horizontal axis, a stanchion fixed to the basement, a control lever and a support element rotatably coupled to the stanchion for rotation about relevant horizontal axes, measuring device coupled to the lever and the support element, and processing device. The measuring device comprises a member vertically suspended to the lever and rotatably coupled to the support element, a Vee device fixed to the member and adapted to be arranged upon the part and two measuring heads with movable feelers adapted to contact diametrically opposed points of the part. The processing device is connected to the measuring heads for providing measurements of the out-of-roundness and of the diameter of the part.