Abstract: An instrument can simultaneous measure a diameter of and a lateral distance along a workpiece. The instrument employs a first member having a longitudinal axis. The instrument also has a pincer device mounted on the first member to reciprocate along the longitudinal axis. This pincer device has a pair of arms mounted in a pincer-like fashion to enable measuring the diameter and the lateral distance along the workpiece. Also included is measurement system having a first and second mechanism. The first mechanism is coupled to the pincer device for providing in response to lateral translation of the pincer device relative to the first member a first readout corresponding to the lateral distance along the workpiece. The second mechanism is coupled to the pincer device for providing in response to angular displacement of the arms, a second readout corresponding to the diameter of a portion of the workpiece.

Abstract: An instrument for the simultaneous measurement of a diameter of and a lateral distance along a work piece comprises a first member having a longitudinal track therein; a second member secured to one end of the first member having a reference surface for the lateral distance measurement, the reference surface being positioned against an end of the work piece from which the lateral distance is to measured; a third member disposed in the track slideable longitudinally therein; a pair of arms mounted in a pincer-like fashion on the third member and extending through the second member to enable measuring the diameter and the lateral distance from the reference surface of a given portion of the work piece; a first arrangement coupled to the third member and one of the pair of arms to obtain a first readout of the lateral distance from the reference surface of the given portion of the work piece; and a second arrangement coupled to the first arrangement and the other of the pair of arms to obtain a second readout of

Abstract: A gauge for measuring both the depth and the diameter of a bore hole comprises a member having a first longitudinal slot therethrough and a surface perpendicular to the slot to engage the face of the bore hole; a first arrangement slidably engaging the slot adjacent one end thereof having a first protrusion extending below the surface; a second arrangement slidably engaging the member adjacent the other end of the slot having first and second arms thereon each disposed at a given angle with respect to and on opposite sides of the member, each of the first and second arms having a second protrusion extending below the surface; the first protrusion and second protrusions engaging a selected one of an inner surface of the bore hole and an outer surface concentric with the inner surface of the bore hole to cooperate in aligning the member with the center line and the diameter of the bore hole; a third arrangement slidably engaging the first slot and the member to measure the depth of the bore hole; and a fourth a

Abstract: The Multiplier comprises a housing in which is set a base having an elongate trackway therein. An open-center frame is set upon the base above the trackway, and a lifting block is set upon the frame to elevate whatever is set upon it. Within the trackway are disposed a piston-hydraulically-operated power wedge, a pressure wedge which contactingly engages the lifting block, and a wedge-shaped separator plate between the pressure wedge and the power wedge. Asperities, in the form of graduated steps, are formed in the mating surfaces of the lifting block, and frame, and pressure wedge and lifting block. Hydraulic operation of the power wedge, in cyclic translations, causes the pressure wedge, through the separator plate, to raise the lifting block slightly above the frame, in each stroke, and a compression spring advances the pressure wedge to receive the lifting block thereupon. A spring also advances the pressure wedge, with each cycle, to position if for another lift of the lifting block.

Abstract: Apparatus to break rock and concrete slabs in situ when inserted into a predrilled hole in the rock and concrete slabs comprises first and second members each having an outer surface parallel to each other and the wall of the predrilled hole; a third member having a driven end, a free end, a first surface parallel to the outer surface of the first and second members slidably engaging a bottom surface of a longitudinal groove in the first member coextensive therewith and second surface opposite the first surface having a first predetermined slope along a given length of the third member from a point adjacent to the drive end to the free end, the third member having a single inward stroke of a predetermined length during each cycle of operation; and a first arrangement disposed between the second surface of the third member and an inner surface of the second member, the first arrangement when rendered operative causing the outer surface of the first and second members to engage the wall of the predetermined hol

Abstract: Apparatus to break rock and concrete slabs in situ when inserted into predrilled holes in rock and concrete slabs comprises first and second members each having outer surfaces engaging walls of the predrilled holes; a third member having a driven end, a free end, a first surface parallel to the outer surfaces of the first and second members slidably engaging a flat bottom surface of a longitudinal groove in and coextensive with the first member and a second surface opposite the first surface having a first predetermined slope along a given length from a point adjacent the driven end to the free end, the third member reciprocating in the groove a predetermined number of times greater than one during each cycle of operation and with a predetermined stroke length; and an arrangement disposed between the second surface of the third member and an inner surface of the second member actuated by each inward stroke of the third member to apply a powerful breaking force directly to the second member resulting in latera