Abstract: A process for determining the alignment of a cylindrical body with respect to a reference direction by means of a measurement device which has a first and a second attachment area and a position measurement probe which is calibrated to the reference direction and is made for detecting a first angle of rotation of the probe around a first axis fixed in space and a second angle of rotation of the probe around a second axis fixed in space. A first measurement and a second measurement is carried out at different areas of the body, the probe being swung in contact with the peripheral surface of the body relative to the first attachment area to measure a characteristic of the first and the second angle of rotation. A comparison of the characteristic of measurements is used to determine the alignment of the body with respect to the reference direction.

Abstract: A arrangement for determining the alignment of marked axes (22, 28, 36, 38, 48, 50) of a first (20, 30, 40) and a second body (26, 32, 42) relative to one another, which is provided with a first and a second measurement device (10, 12) which can be attached to the first body or to the second body in a fixed spatial relation to the respective marked axis, the first measurement device (10) having a first source (L2) for delivering a light beam and a second (D1) and a third optoelectronic sensor (D3), and the second measurement device (12) having a second (L1) and a third source (L3) for a light beam and a first optoelectronic sensor (D2), the optoelectronic sensors being made such that they can determine the impact point of a light beam on the sensor, and the first light source being assigned to the first sensor and the second and the third light source being assigned to the second and third sensor.

Abstract: A method and apparatus for aligning and cutting pipes to extract and install piping in industrial plants is characterized by the use of lasers on a ring for aligning the cutting tool. By adjusting the ring so that beams from the lasers strike specified targets at a remote location corresponding with a pipe end, a cutting location is defined so that the trimmed end of a first pipe will properly align with a remote pipe. When the pipes welded together, their ends will match, thereby minimizing stress in the pipe. A cutting tool can be provided directly on the ring so that the pipe can be cut without removing the ring.

Abstract: A process and device are provided for determining the axial position of two spindles or shafts, for example on machine tools, with respect to parallel offset and angular offset. The process includes moving both an optical transmitting device and also an optical receiving device each into at least three different rotary positions. In this way, pertinent circles can be defined by which the location of the axis of rotation of the first spindle or the center of rotation of the second spindle can be computed in relation to one another. The parallel offset of the spindles can thus be determined in the horizontal and in the vertical plane. To determine the angular offset of the two spindles, another measurement of this type must be taken in which the optical transmitting device and the receiving device are mounted interchanged with one another on the spindles.

Abstract: The present invention pertains to a method and apparatus for obtaining templates used in pipe end cutting essential in fabricating saddle and mitered pipe connections. The template is made by an array of z-shaped pins arranged radially to form the shape of a stepped cylinder. A flexible adjustable length track on the z shaped pins or on another set of pins forms a track for a roller on a tool to follow. This track replaces metal templates, which have to be specially made for cutting each shape and size pipe for pipe connections to other pipes or to boilers and other devices. The invention provides a large array of templates for one or more sizes of pipe eliminating the need to have a large number of templates for different pipe sizes and shapes. A miter table attachment can be used for off center pipe connection cuts.

Abstract: An angle finder for large diameter ducts and piping. It consists of a pair of legs having front and back sides, and top and bottom ends. The top ends are pivotally connected, thereby forming an inverted adjustable “V.” There also is provided a moveable center pointer having a top and a bottom mounted on the top end of the legs so as to bisect the “V” formed by the legs. Finally, there is a direct reading angle finder, preferably used in conjunction with a laser, mounted near the bottom of the moveable center pointer.

Abstract: A method and apparatus is provided for mechanically coaxially aligning adjacent element shafts in the “X”, “Y”, and “Z” axis. The apparatus includes a holder and at least one aligning shaft slidably positioned with the holder. The aligning shaft and holder are constructed to receive a respective element shaft in substantially coaxial alignment therewith and to one another.

Abstract: A clamping apparatus is provided with a shoe mountable on a work surface, and a clamp having a foot adapted for removable engagement with the shoe. Also provided is a method of clamping a workpiece in a fixed location with respect to a work surface including mounting a shoe on the work surface, providing a clamp with a foot and a clamping head, where the foot is adapted for removable engagement with the shoe, engaging the shoe and the foot, and clamping the workpiece between the clamping head and the work surface.

Abstract: A pipefitter's protractor is used to measure the angle between two separate pipes having an intersecting point. The protractor assembly includes a pipe attachment bar secured to the squared end of one pipe, with a protractor arm extending from the center of the pipe attachment bar and concentric with the centerline of the pipe. The protractor extends from the arm, with the arm and protractor rotating about the pipe attachment bar fitting to align the protractor plate coplanar with the plane defined by the pipes. The protractor is adjusted along the protractor arm to position the protractor origin at the intersection of the pipe centerlines, and a line is run from the origin to the center of the second pipe. The angle between the pipes and the distances from the protractor origin to the ends of each pipe are then used for fabricating an elbow to join the pipes.

Abstract: A spotting device for use in pipe fitting and construction trades includes a generally housing having a beam emitting end and an opposing coupling end. The housing is defined in part by a central longitudinal axis passing through the beam emitting end and the coupling end. A visible light beam emitting means is located within the housing for selected emission of a visible light beam from the beam emitting end of the housing. The emission of the visible light beam is provided such that the light beam projects from the beam emitting end concentrically with the central longitudinal axis.

Abstract: A method and apparatus for aligning and cutting pipes to extract and install piping in industrial plants is characterized by the use of lasers on a ring for aligning the cutting tool. By adjusting the ring so that beams from the lasers strike specified targets at a remote location corresponding with a pipe end, a cutting location is defined so that the trimmed end of a first pipe will properly align with a remote pipe. When the pipes welded together, their ends will match, thereby minimizing stress in the pipe. A cutting tool can be provided directly on the ring so that the pipe can be cut without removing the ring.

Abstract: A method and apparatus is provided for mechanically coaxially aligning adjacent element shafts in the “X”, “Y”, and “Z” axis. The apparatus includes a holder and at least one aligning shaft slidably positioned with the holder. The aligning shaft and holder are constructed to receive a respective element shaft in substantially coaxial alignment therewith and to one another.

Abstract: Data obtained by rotating a set of sensors attached to rotatable parts or the like, in order to perform an alignment of such rotatable parts, is organized in three dimensional vector form (triplets). Two components of such a three dimensional vector will relate to observed apparent geometrical shifts and one component relates to an angle of rotation. In order to arrive at an improved “best fit” when evaluating the data, a three dimensional analysis is performed, based on the concept of an elliptical helix, and using spatial filtering or a neural network. For spatial filtering, three dimensional Fourier transforms are used.

Abstract: A pipefitter's protractor is used to measure the angle between two separate pipes having an intersecting point. The protractor assembly includes a pipe attachment bar secured to the squared end of one pipe, with a protractor arm extending from the center of the pipe attachment bar and concentric with the centerline of the pipe. The protractor extends from the arm, with the arm and protractor rotating about the pipe attachment bar fitting to align the protractor plate coplanar with the plane defined by the pipes. The protractor is adjusted along the protractor arm to position the protractor origin at the intersection of the pipe centerlines, and a line is run from the origin to the center of the second pipe. The angle between the pipes and the distances from the protractor origin to the ends of each pipe are then used for fabricating an elbow to join the pipes.

Abstract: A method for acquiring misalignment information as to centerlines of first and second in-line shafts utilizing a shaft alignment system including an analyzer having a memory. A sensor head mounted on the first shaft at an initial angular position relative to the centerline of the first shaft includes a microprocessor having memory, a collimated light source emitter for transmitting a collimated light beam in a first direction corresponding to the centerline of the first shaft, a detector having a detecting surface for detecting a collimated light source from a second direction corresponding to the centerline of the second shaft, and an angular position sensor for determining an angular position of the sensor head as the head is rotated about the centerline of the first shaft. The sensor head is rotated in a first or a second rotational direction relative to the centerline of the first shaft.

Abstract: An articulate laser degree finder tool and attachments for use in establishing a precise level line ranging from the horizontal to a vertical position in degrees for use in the construction industry.

Abstract: A tool for determining the perpendicular of the face of a pipe flange relative to the outside diameter of the pipe to which the flange is being attached. The tool being a 90 degree framing square with a lateral or oblique leg portion. The lateral or oblique leg allows the square to be placed on edge with a first leg of the square parallel and in contact with the face of a pipe flange and a second leg at 90 degrees to the first leg extending beyond the pipe flange parallel to and in contact with the outer diameter of the pipe to be joined to the flange. Indicia is provided inscribed on the face of the squaring tool adjacent the contact edges to provide quick reference to the flange size and for use in various other construction layout measurements.

Abstract: A first mounting plate (4) is formed with a ring-shaped projection (6) on its undersurface, facing a through hole (5) in the center. An outer peripheral wall (61) of the projection (6) is finished into the shape of a perfect circle. In mounting a motor (2) on the first mounting plate (4), the position of a motor shaft (3) is adjusted on the basis of the outer peripheral wall (61) of this perfect circle. On the other hand, the upper part of the inner peripheral wall of a second mounting plate 10, which faces a through hole 5 in the center, is formed into an expanded portion (71), and the inner peripheral wall of the expanded portion (71) is finished into the shape of a perfect circle. In attaching a housing (9) of a machine tool to the second mounting plate (10), the position of a main spindle (1) is adjusted on the basis of the inner peripheral wall of this perfect circle.

Abstract: An alignment device for use in welding which includes a saddle style support which rests upon a first pipe. A second pipe is clamped to the saddle style support in an orientation substantially perpendicular to the first pipe upon which the saddle style support rests. The second pipe serves as a carrier member of a fitting, such as a weldolet. Cinch straps can be used with the saddle style support to facilitate welding on the underside of horizontal pipes or on vertical pipes.

Abstract: A pipe fitting tool is provided including a square having a pair of planar rectangular strips coupled at ends thereof in perpendicular relationship. Also included is at least one holder having a pair of lower surfaces which form an angle with respect to each other. The holder further has a top surface secured to the square such that the same resides in a plane in which an intersection of the lower linear surfaces resides.

Abstract: A rotational alignment device centers a shaft-mounted transducer on a rotating shaft. The alignment device includes a moveable base that is configured to receive the shaft-mounted transducer through a coupling device; a mounting base that connects to the rotating shaft; and a radial alignment assembly which connects the moveable base to the mounting base in a manner whereby the alignment error between the transducer and the rotating shaft can be corrected. The alignment error is corrected by making polar-coordinate type adjustments (i.e., correcting angular error and radial offset error) rather than traditional X-Y coordinate type adjustments.

Abstract: A tool and method for aligning multiple shaft segments which are coupled together to form a single rotating shaft. The device comprises a cylindrical bar having an annular, axially-extending outer surface, rotating means on a first end of the bar, and engaging/disengaging means fixed on the second end of the bar. The bar is temporarily inserted through a bolt hole in the collar of the first shaft and partially through an aligned hole in an adjacent coupling of the second shaft until at least a portion of the engaging/disengaging means is positioned within the bolt hole of the second collar. The engaging/disengaging means engages the second collar so that a turning force from the first shaft is transmitted to the second shaft. The engaging/disengaging means also disengages from the second collar by rotating the bar after rotation of the shaft is ceased.

Abstract: Proposed for detecting the relative position of two bodies (2, 3) or surface regions of bodies is an electro-optical measuring instrument which has, in a known way, a light beam transmitter (4), which can be attached to the one body (3) or surface region and transmits a focused light beam (L), and a single-axis or multi-axis optoelectronic position detector with a light-sensitive measuring surface (5). During measurement of the bodies (2, 3) or surface regions, the light beam (L) impinges on the measuring surface (5), and its point of impingement (LA) moves over the light-sensitive surface (5), during execution of a measuring movement, in a way which is characteristic of the current mutual alignment of the bodies (2, 3) or surface regions.

Abstract: Alignment data is analyzed to determine machine condition information that is not necessarily related to alignment. Alignment fixtures provide alignment data to an analyzer that finds a curve of a predetermined type, such as a sine curve, that best fits the data. A confidence factor is calculated indicating the probability that the alignment data corresponds to misalignment. The alignment data is further analyzed to determine a condition, other than misalignment, that contributed to the magnitudes of the alignment data. Preferably, the analyzer is used to check for machine conditions such as looseness in the machine, rubs, and spall defects in a bearing. Preferably, the condition analysis is based on both the confidence factors and curve parameters, such as phase, offset and amplitude of a sine curve. In the condition analysis mode, the analyzer provides both manual and automatic routine for removing selected segments of data to produce trial data sets that are analyzed to determine machine conditions.

Abstract: A device for aligning multiple shaft segments which are coupled together to form a single rotating shaft. The device has two elongate cylindrical bars each having an annular, axially extending outer surface, one end by which it is rotatable, and the other end which is engagable and disengagable to the other cylindrical bar. One of the bars is inserted into an aperture of one of the shaft segments and the other bar is inserted into the other one of the shaft segments. The engageable and disengagable sections of the bars are arranged such that when the bars are engaged the force of the bar that is rotated is transferred to the other bar and when the rotated bar is rotated from the engaged position the bars are not in contact.

Abstract: A portable and or modular alignment system for establishing the proper axial alignment of a first rotatably mounted shaft, and a second opposed, rotatably mounted shaft. The first shaft extending from a first unit, while second shaft extends from a second unit. The axial alignment of the first shaft with the second shaft is achieved by adjusting the relative horizontal and vertical position of the first unit with respect to the second unit, where the second shaft may be assumed to be fixed in position. The alignment system comprises a control and computing unit for receiving alignment information indicative of vertical and horizontal position changes to be provided to align the first shaft with the second shaft. Changes in the vertical position are provided by a plurality of vertical actuator units, while changes in the horizontal position are provided by a plurality of horizontal actuator units.

Abstract: A template for use in the installation of water faucets and spouts adjacent to a sink or tub upon a plywood support. The plywood, acting as a support for mortar and tile, is opened to the approximate dimension of the template upon which suitable valve and faucets stems are appended and fixedly attached.

Abstract: The specification discloses apparatus for aligning stationary in-line machine shafts. In a preferred embodiment, the invention provides an alignment system having a sensed point rotatably positionable around a shaft for rotation through a plurality of angular positions around the shaft to provide a reference point against which misalignment is measured. The position of the sensed point is sensed by a sensor which is rotatably positionable around the shaft independently of the sensed point for rotation through a plurality of angular positions about the shaft.

Abstract: An alignment analyzer for facilitating the alignment of a machine set including co-rotatable in-line shafts includes a display device on which separate offset misalignment and angle misalignment components are displayed as a single point in an x-y coordinate system. The coordinates of the point are the individual misalignment components. Also displayed on the display device are curves representing "acceptable" and "excellent" tolerance ranges. The displayed point and the curves together indicate whether the combined offset and angular misalignment is within or without the "acceptable" tolerance range, and whether the combined offset and misalignment is within or without the "excellent" tolerance range.

Abstract: A device for measuring the straightness of a conductive object includes a plurality of capacitive distance sensors which are aligned along an axis of a ruler to be placed on the object. Circuits are provided for indicating the measurements provided by each sensor.

Abstract: A shaft alignment wherein a pair of substantially identical clamping members are mounted on the shafts which are to be aligned, with each clamping member having a peripheral reading surface which is generally flat. Each clamping member has a support rod adjustably positioned thereon and projecting generally axially in a skewed relationship relative to the axial direction of the shaft. Each support rod mounts a gauge assembly adjustably positioned for cooperation with the flat reading surface on the other clamping member. The clamping members are mounted on the shafts so as to be generally axially aligned, whereupon the skewed relationship of the support rods permits them to be positioned in generally parallel relationship with one another, with the respective gauge assemblies being adjustably positioned to cooperate with the reading surface on the opposed clamping member.

Abstract: A method and apparatus for aligning fixed and movable shafts includes members fastened to each shaft to extend substantially normal to the axis thereof and with indicators on the free ends thereof. Rigid members couple the free ends so that misalignment will be reflected in the indicators and necessary movement to align the shafts calculated from a simple formula.

Abstract: A handle stop aligning and holding apparatus for facilitating the installation of valve assemblies in a faucet having wide spread valves. The apparatus is an integral one-piece, flat, elongate plate having a plurality of openings longitudinally spaced from each other at preselected intervals. The openings are adapted to receive and hold against rotation handle stops of valve assemblies.

Abstract: A valve stem aligning and holding apparatus for facilitating the installation of valve assemblies in a faucet having wide spread valves. The apparatus is longitudinally adjustable among a wide variety of positions. The apparatus comprises a stationary member including guide raised side sections, and a movable member adapted to coact with the guide side sections and be slidably mounted in the stationary member. The stationary member has a plurality of openings at predetermined intervals while the movable member has at least one opening adjacent one end, preferably the front end, thereof. The openings are adapted to receive and hold valve stems of valve assemblies.

Abstract: The specification discloses apparatus for aligning rotatable in-line machine shafts. In a preferred embodiment, the invention provides an alignment system having a sensed point positioned for rotation with the shaft to be aligned to provide a reference point against which misalignment is measured. The position of the sensed point is adjustable in three-dimensional space by an adjustment system so that the sensed point may be easily secured in a desired location to eliminate errors attributable to movement of the sensed point or improper location of the sensed point. In addition, the alignment system provides a capacitive displacement system to more accurately sense the sensed point, binary blocks to facilitate proper vertical positioning of the sensed point, and an improved chain assembly to facilitate mounting of the alignment system and to reduce errors of the type common to conventional alignment systems.

Abstract: A scriptwriting guidance device for use by individuals who are visually or otherwise impaired, the device acting to guide the writer's pen or other writing implement along a straight, horizontal path across a writing surface to form complete letters and other characters without interference from the device. The device includes a backboard having a shaft mounted for rotation adjacent one side edge thereof. Slidable along the shaft in incremental steps is a slide from whereby is cantilevered a guide element formed by a rectangular frame that overlies a paper sheet lying on the backboard. Disposed within the window of the frame is a rectangular template of smaller dimensions, the template having a narrow slot that defines a straight, horizontal path. The opposite ends of the template are coupled by springs to the corresponding ends of the frame whereby the template effectively floats within the window and is free to shift laterally.

Abstract: Methods and systems for acquiring offset data for aligning co-rotatable in-line machine shafts. Two sets of offset data, each set for example representing relative displacement in a radial direction between a reference point referenced to one of the shafts and a particular point on the other of the shafts at given angular positions, are collected at a plurality of measurement angular positions. The measurement angular positions are not necessarily the 0.degree., 90.degree., 180.degree. and 270.degree. angular positions at which measurements are traditionally taken. Preferably, measured offset data is collected during continuous rotation of the shafts in their normal direction of rotation or at convenient positions where the rotation is halted. Measured offset data may be collected at as few as three angular positions, but preferably is collected at more than three angular positions, and typically at a multiplicity of angular positions such as thirty or forty.

Abstract: Apparatus for centering and axial and parallel alignment a pair of rotatable shafts. An alignment collar assembly is adapted to fit over and around the periphery of a flanged end of a shaft or an adapter on the shaft. The alignment collar has mating halves for easy assembly and disassembly and has roller means adapted to engage both the periphery and the underside of the flanged end to permit a 360.degree. rotation of the alignment collar assembly relative to the shaft. The alignment collar assembly is also adapted to support one or more gages for determining the axial and parallel position of the pair of rotatable shafts relative to each other.

Abstract: A device for aligning the shafts of adjacent driven and driver machinery units comprising a pair of congruent alignment plates connected to the coupling flange of each plate such that the axis of each shaft is normal to an identical point on each plate. A pair of centering bars positions each shaft with a coupling flange thereon in such position. Opposed keys on one plate are registered in corresponding keyways on the opposed plate by manipulation of the machinery. A gauge plate indicates any offset in the plates. Registration of the keys and superimposition of the congruent plates is achieved by machine manipulation to assure the user that an alignment in angularity and parallelism has been achieved. Bubble levels and dial indicator gauges are used in connection with the plates to enhance the alignment process.

Abstract: An alignment gauge to facilitate the measurement of welded joints and the alignment of elongated structures including beams, pipes, rails, such as train rails and trolley car rails. The alignment gauge has five basic components, a base, an upright member and three dial indicators. The dial indicators are fastened along the top of the base, one at the center and one to each side of the center equally spaced from the center. The dial indicators have actuating plungers which pass through openings in the base and protrude through the bottom of the base. The upright member is mounted to the top of the base. It protects the dial indicators. The bottom of the base is placed on a calibration standard and dial indicators are adjusted to zero by a zero adjustment. With the dial indicators adjusted to zero, the alignment gauge is placed on the elongated structure with its center over the welded joint. The base has a channel in the center of the bottom surface that provides clearance for the welded joint.

Abstract: Methods for verifying the mechanical integrity of an alignment bracket, particularly a multi-configurable alignment bracket, used for aligning co-rotatable in-line machine shafts, and for determining the amount of alignment bracket "sag" to be accounted for when subsequently employing readings taken with the alignment bracket. The invention employs a previously-established relationship between sag and deflection of the alignment bracket under the influence of a known force to determine sag and to verify mechanical integrity of the alignment bracket in situ, avoiding the need for the usual prealignment sag determination on a separate straight pipe or mandrel. In the practice of the method, the alignment bracket is set up in a position for use, on the actual shafts being aligned. The extension bar of the alignment bracket is positioned above the centerlines of the shafts, and a known force is applied by hanging a known weight at a predetermined point on the alignment bracket.

Abstract: A device for accurately setting the cutting height of a grass mower, especially a golf green mower in the field is described. A semi-rigid bar is placed between the rear fixed roller and the front adjustable roller of the mower and locked into place with a height adjusting screw which is set to a selected height-of-cut and releasably attached to the bed knife intermediate the front and rear rollers. A rigid bar is secured at the rear-end of the semi rigid bar and extends forwardly past the front roller. A spring loaded dial indicator is mounted at the forward end of the rigid bar and contacts the semi rigid bar so as to provide a reading of deflection of the semi rigid bar as the front roller is adjusted.

Abstract: An assembly for providing alignment growth measurements for coupled shafts includes laser alignment measurement equipment and a mounting assembly for attaching the laser alignment measurement equipment to bearing housings of cooperating coupled shafts. The mounting assembly includes a bracket for attaching directly to the bearing housing. A first mounting disk is attached directly to the bracket. A second mounting disk is attached to the first mounting disk and is universally pivotally adjustable about a center pivot ball between the mounting disks. Tilt-adjusting screws are placed at equally spaced quadrantal positions to effect the pivoting of the second mounting disk. A cylindrical insert is attached to the second mounting disk and receives a detachable end cap. The end cap is adapted to receive the laser measuring assembly. Accurate measurement data is provided by a plurality of pairs of cooperating tooling balls. An outside micrometer is used to measure the gap.

Abstract: A machine shaft aligning apparatus includes electronic indicating devices for automatically outputting signals to a computer indicative of the magnitude and direction of radial displacement of two coupled shafts as the coupled shafts are rotated to 4 clock positions (i.e. 12, 3, 6, and 9 o'clock). The computer enables calculation and display of horizontal and vertical machine adjustments required to effect proper coaxial alignment of the coupled shafts of the machines.

Abstract: A shaft alignment apparatus is set forth utilizing a "W" shaped yoke securable over a first shaft wherein the yoke includes an upwardly extending support rod with a first clamp secured thereto to coaxially align a second clamp and enable positioning an associated dial indicator `micrometer` to an adjacent shaft.

Abstract: A shaft alignment system is disclosed to facilitate obtaining alignment measurement data on coupled rotating shaft machinery. The system includes one or more alignment scales which are mounted for relative sliding movement across the shaft coupling. The alignment scales include cooperating true and Vernier scale components for highly precise measurements with readings to an accuracy of 0.001" or 0.01 mm. This allows both axial displacement and parallel and angular misalignment to be checked and corrected. The system can be used on many different couplings, such as disc-type and diaphragm-type, flexible couplings. The alignment scales are mounted on U-shaped bases with the distal end of the true scale being held captive in the lateral direction within the Vernier scale base so as to stabilize against wind induced fluttering and vibration.

Abstract: The specificatin discloses several methods of measuring the alignment of coupled shafts preferably by suspending gauges over the coupled shafts and taking gauge readings, measuring certain distances of the gauges from predetermined points such as the coupling centerline, inserting those values in given equations and solving the equations. The solutions are then compared to a predetermined range of acceptable values to determine if the coupled shafts are in an acceptable alignment.

Abstract: A shaft alignment device comprises a pair of opposing adjustable clamping members, each being attached to the outside diameters of the shafts or axles to be aligned. A tubular, telescoping indicator holder extends outwardly from each clamping member. A dial indicator gauge is mounted on a rod projecting upwardly from the extended end of each indicator holder. The top surface of the clamping members are machined to a radius whereby rotating them 180.degree. from each other forms an indicating circle which is read by the dial gauge mounted on the opposing indicator holder.

Abstract: In taking dial indicator readings as a part of the so-called "reverse indicator" shaft alignment procedure for a turbine-to-compressor drive, the high breakaway torque necessary to initiate rotation of the turbine shaft is supplied by connecting such shaft to power drive means through a power chain. In this manner the turbine shaft may be quickly rotated in small, precisely controllable increments without overshoot, thus saving valuable time otherwise wasted in performing this function manually. Tapered, hollow alignment brackets minimize "bracket sag".

Abstract: A method and apparatus for positioning a shaft aligning sensing structure on a shaft to a calibrated position comprising, a support, first means on the support controlling movement of the shaft aligning sensing structure from a first position to a second position, positioning means mounted on the support acting with the surface of the shaft and cooperating means mounted on the shaft aligning sensing structure responsive to the positioning means, whereby the positioning means reacts to the diameter of the shaft and causes the cooperating means to position the shaft aligning sensing structure at the calibrated position.