Abstract: Apparatus for mapping the inner surface of a cylinder utilizing a laser to align a spider disposed within the cylindrical surface, the spider having a rotatable arm with a finger connected to a linear variable differential transducer. The finger being biased outwardly and the arm is rotated 360.degree. from a predetermined angular position, the spider and arm are moved axially predetermined increments and signals indicative of the axial and annular position of the arm and the extension of the finger are recorded and processed to map the internal surface of the cylinder.

Abstract: Illuminated sighting structure for archery bows wherein a bow attachment bracket is provided not only with sighting units but also with lighting means for selectively illuminating such sighting units, especially the tips thereof. The bow-sight illumination structure itself is designed to have a plastic non-conductive case and allowing for on-off conditions of the light employed by a non-conductive element being interposed in the electrical circuit, which, when compressed, will complete such circuit. This is preferably accomplished by a metallic disc or element within a non-conductive ring, the disc being of less width than the ring. An adjustment screw accomplishes the width-wise compression of the ring, for conduction purposes, and also a backing off such that the ring by its nature expands so as to separate the electrical elements of the lighting circuit.

Abstract: An incremental path measuring instrument is disclosed which includes a plurality of reference marks R.sub.1 . . . R.sub.n which are interposed between respective code marks C.sub.1 . . . C.sub.n. The reference marks and code marks are applied alternately and serially to the reference track included on the measuring scale. A scanning unit is included in the measuring device for scanning in series the reference marks and the code marks. Each of the code marks is unique, and only one of the two adjacent code marks and the respective reference mark must be scanned by the scanning unit in order to identify the reference mark unambiguously. When absolute position values are allocated to respective individual reference marks, the incremental path measuring device can operate in a quasi-absolute mode of operation, since then the position of each of the reference marks is established with respect to a predetermined zero point.

Abstract: A device for thermal shock testing and thermal cycling of workpieces is provided which comprises at least one fluidized bed chamber for thermally treating a workpiece. Agitation of the area about the workpiece is accomplished by movement of the workpiece, by baffles, or by providing a supplementary gas distributor. The agitation provided increases the flow rate of particles of the fluidized bed particulate media in a localized area about the workpiece, thus increasing the rate of heat transfer between the bed media and the workpiece, and increasing thermal shock capacity of the thermal shock tester.

Abstract: A gauge for checking the quality (accuracy; tolerance: trueness) of gear teeth is provided with a set of gauging teeth which, when the gauge is used, mesh with the teeth to be checked. This effects automatic alignment of the actual contact pins relative to the teeth to be checked.

Abstract: A template set for use in corneal size measurement. The templates take the form of identical thin and flexible blades rounded at one end, and are arranged in a stack in parallel planes. The blades are pivotally coupled together adjacent their opposite ends by a pivot pin which extends through the whole stack. The pivot pin allows individual blades to be pivoted out of the stack for use. Each blade has a circular opening adjacent the rounded end of the blade and the openings are graduated in size in predetermined increments from one end of the stack to the other. Each blade is also visibly marked to indicate the size of the opening.

Abstract: A measuring scale carrier for a longitudinal or angle measuring system is stretched and contracted in a localized manner in order to bring about a desired error correction course through the generation of localized longitudinally extending forces in the carrier. A number of approaches for generating these localized longitudinally extending forces are described, including the use of spring elements mounted on the carrier and the localized variation of a predetermined longitudinal tension in the carrier.

Abstract: A coupon is bonded to a component using a bonding agent which is capable of withstanding temperatures only up to a selected temperature above which the bonding agent no longer holds the coupon to the component. The component, during an operation, is intended for exposure to temperatures not above the selected temperature. An exposure of the component to the elevated selected temperature is identified by the fact that the coupon is no longer bonded to the component after termination of the operation. When the component is provided with insulation, the selected temperature is chosen to correspond to a temperature at which the insulation fails to determine the integrity of the insulation after the insulation. The coupon may be bonded to an exterior or interior surface of the component. With an exterior bonded component, visual inspection is sufficient. With an interior bonded component, detection means such as ultrasonic instrumentation is utilized to determine the presence or absence of the bonded coupon.

Abstract: An illuminated retractable tape measure has a casing which contains a coiled tape rule whose free end extends through an opening in the casing. A lock arrangement locks the tape against automatic retraction into the casing. In the lock arrangement, a locking member is mounted in the casing with an end thereof engageable with the tape to hold the same against a portion of the casing in a locking position. The end of the locking member is moved out of engagement with the tape when an unlocked position is established. A slide actuator pivots the lock member between its locked and unlocked positions. A small lamp or LED is incorporated in the casing for illuminating the ruling on the tape measure, and the actuator closes a switch when the actuator is moved to its locked position to light the lamp. This feature facilitates reading measurements on the tape measure, especially in adverse lighting conditions.

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: An extensometer for measuring changes in the vertical distance between the roof and floor of a mine opening which comprises; a pair of rigid telescoping members, a tension spring securing said members to each other in a telescoping relationship, a hook for attaching a non-extensible cable to each of said members, and an indicator for determining telescopic movement of said members. The extensometer of this invention is utilized by securing one of said telescoping members to the roof of the mine and the other telescoping member to the floor of the mine with the axis of said members being disposed along the vertical. The telescoping members are secured, under tension, to the mine roof and floor by means of a non-extendible cable such as a steel cable. The indicator for determining the telescopic movement of the members may be a pair of lugs or flanges or other indicating marks, each member of which pair is affixed to a separate telescoping member.

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: The invention relates to an aircraft attitude indicator having a gyro controlled spherical display with delineations of regularly spaced meridians that maintain a vertical orientation and spaced parallels transverse to the meridians, one of which is an equator that divides the sphere into upper and lower hemispheres and corresponds to a horizon. The lower hemisphere has triangular pointer indicia, each symmetrical to a delineated meridian and with a base on a parallel and an apex proximal to the equator. The pointer indicia cooperate with a reference delineation that is relatively fixed with respect to the aircraft and substantially centered on the display. The pointer indicium nearest the reference designates the "up" direction; those adjacent to it provide information about changes in aircraft attitude relative to "up" that will result from possible maneuvers from the existing attitude.

Abstract: A moisture sensing element is provided and is constructed of a body having therein a first zone formed of porous material with a first range of pore size having a first mean pore size and a second zone formed of a porous material with a second range of pore size having a second mean pore size such that in use the body is located within a desired soil area under surveillance whereby both the first and second zones are placed in hydraulic conduction with the desired soil area. The first mean pore size is substantially greater than the second mean pore size such that the second zone will remain hydrated when the first zone is becoming dehydrated. Electrode elements are associated with each of the first and second zones in spaced relation and define therebetween respective electric current flow paths through each of the first and second zones for sensing an electrical property of each of the zones.

Abstract: An elongated wheeled bench is provided for predetermined aligned positioning beneath a stationary jack stand supported vehicle body to be straightened and includes, supported therefrom at one end, a vertically adjustable horizontally elongated mount extending transversely of the bench. The mount has a light beam generating head mounted thereon for adjustable positioning therealong and also for angular displacement relative thereto about a first axis paralleling the mount and a second axis disposed normal to the first axis. The head is operable to generate a narrow light beam disposed normal to the second axis and scales are provided to indicate angular positioning of the head about the first and second axes and also longitudinal positioning of the head along the mount.

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: A trammel assembly consisting of a trammel head and a controllably dimensioned flat scale. This trammel head contains opposite pairs of guide regions for receiving variously sized scales and for tightening these scales in place.

Abstract: In a plotter, an elongated strip of plotting paper extends between rolls at opposite ends of a plotting table to receive graphic information from a plotting instrument that is carried over the table by means of a motor controlled carriage. Different segments of the elongated strip are shifted onto the work surface of the table to receive the graphic information by coupling the strip to the plotting carriage and moving the carriage together with the strip across the table in an indexing operation. To prevent distortion of the material and associated positioning errors during the step of indexing, the material being pulled onto the table by the carriage is placed in tension and the material being discharged from the table is maintained substantially tension-free.

Abstract: The measuring device comprises a body (1) whose end (1a) is secured to a rod (2) connected to a measuring instrument. A probe assembly (3,4,5) is provided with a feeler head (4a) and is secured to a lever (6) which rotates around a pin (8) in the body (1). The angular path of the lever (6) is limited by a stop (12) built into the body (1) and by a stop adjustable by means of an eccentric part (11a) in such a manner that the body (1) always takes the same position in each measuring direction on alternate measuring of two opposite surfaces lying in the same plane. A spring (9) urges the lever (6) towards its upper position. By this means, the measurement of the distance between opposite surfaces requires no calculation, i.e. addition or subtraction of measuring constants, thus making measurement easier and precluding errors in calculations.

Abstract: A probe construction is disclosed which incorporates several techniques for adjusting the position of the stylus.