Abstract: A tool sleeve rotation limitation system for reducing the rotation of a tool sleeve within a support block bore of a support block, the tool sleeve having a forward portion and a rearward portion. The tool sleeve rotation limitation system comprises a rotation limitation member located in an engaging relationship between the rearward portion of the tool sleeve and the block bore such that the rotation limitation member will be moved axially along the rearward portion of the tool sleeve as the tool sleeve is inserted into the block bore so as to engage the block bore and the rearward portion of the tool sleeve and reduce rotation of the tool sleeve within the block bore.

Abstract: A cutting tool retention system for retaining a cutting tool having a tool recess. The cutting tool retention system comprises a support block having a block bore and a block recess intersecting the block bore and a clip movably situated in the block recess, the clip having a spring structure which engages the support block and urges the clip into an engaging relationship with the tool recess of the cutting tool situated within the block bore, the spring structure allowing the clip to be disengaged from an engaging relationship with the tool recess of the cutting tool situated within the block bore by applying force directly to the clip so as to overcome the urging of the spring structure.

Abstract: A tool sleeve rotation limitation system for reducing the rotation of a tool sleeve within a block bore of a support block, the tool sleeve having a sleeve engagement surface and the block bore having a block engagement surface. The tool sleeve rotation limitation system comprises a rotation limitation member located between the tool sleeve and the block bore so as to engage the tool engagement surface and the sleeve engagement surface and reduce rotation of the tool sleeve within the block bore, the rotation limitation member having a member perimeter which conforms to at least one of the sleeve engagement surface and the block engagement surface. Alternatively the tool sleeve rotation limitation system comprises a resilient rotation limitation member located between the tool sleeve and the block bore so as to frictionally engage the tool sleeve and the block bore and reduce rotation of the tool sleeve within the block bore.

Abstract: A drill bit for drilling holes in a work surface including a hard wear-resistant insert and a metal body including a top working surface of an irregular surface configuration having a slot for retaining the hard wear-resistant insert. The body having a metal grain structure substantially parallel with the contour of the body. In a preferred embodiment the body is formed by cold-heading.

Abstract: A system and method for providing Feature Group B or Feature Group D access to the public data network for effecting point of sale transactions such as credit card authorization. The credit card authorization device includes a modem and auto-dialing mechanism which is connected by a station line to an originating central office switch. The originating central office switch is connected via Feature Group B or Feature Group D trunks to a designated destination central office including a stored program control (SPC) switch. The destination central office is a functioning central office connected to other central offices by non-Feature Group trunks. The Feature Group trunks are connected by the switch in the destination central office to a designated line which is connected to a line side modem which is connected via the public data network to a host computer for effecting the credit card authorization.

Abstract: A drill bit for drilling holes in a work surface including a hard wear-resistant insert and a metal body including a top working surface of an irregular surface configuration having a slot for retaining the hard wear-resistant insert. The body having a metal grain structure substantially parallel with the contour of the body. In a preferred embodiment the body is formed by cold-heading.

Abstract: An insert for use in a rotary drill bit wherein first and second top surfaces are opposite a bottom surface, first and second leading faces are opposite first and second trailing faces, and first and second end faces represent outside edges of first and second portions of the insert wherein in one embodiment each of the top surfaces meets its respective leading face to form a cutting edge which forms an oblique angle wherein the cutting edge on the first portion is linearly aligned with the cutting edge on the second portion.

Abstract: A rotary drill bit insert including an elongated body rotatable about a central axis and having two halves symmetrical about the axis, each symmetrical half having a top surface including a planar front surface contiguous a noncoplanar back relief surface, a bottom surface opposite the top surface, a leading face extending between forwardly facing edges of the front surface and the bottom surface, a trailing face opposite the leading face extending between rearwardly facing edges of the back relief surface and the bottom surface and a distal end surface extending between outwardly distal edges of the top surface, leading face, trailing face, and bottom surface.

Abstract: A rotatable cutting tool for mounting in the bore of a block comprising an elongate symmetrical body having forward and rearward portions wherein the forward portion terminates in a front end at which there is a cutting tip and the rearward portion is of a generally constant diameter and terminates in a rear end. The rearward portion contains a channel adjacent the rear end. A resilient retainer surrounds substantially all of the rearward portion and extends rearwardly past the rear end. The retainer has an inward projection which is received within the channel so that the elongate body and retainer are retained together. The retainer has an unstressed diameter greater than the diameter of the bore so that when the cutting tool is inserted into the bore the retainer expands against the bore so as to be held therein whereby the body is free to rotate relative to the block.

Abstract: There is disclosed a base and block assembly for use with an earthworking bit. The assembly comprises a base and a block engaged in the base. The block has a shank portion and a toolholder portion extending from a first end of the shank and adapted for receiving the earthworking bit. The assembly also comprises means for causing the block to preferentially fail when exposed to abnormally high cutting loads. Also disclosed is a method for protecting the base of a base and block assembly when in use with an earthworking bit. The method comprises preferentially weakening the block so as to cause the block to fail when exposed to abnormally high cutting loads and engaging the block with the base.

Abstract: The specification discloses an insert tipped tool bit having grooves formed on the longitudinal periphery of the bit in the parent material supporting the insert and a method of reducing erosion of the insert supporting parent material by forming grooves on the longitudinal periphery of the tool bit and sizing and spacing the grooves so that earth fines can pack in the grooves and create a boundary layer of earth fines around the parent material.

Abstract: A method and apparatus for installing chemical anchor bolt assemblies in earth formations comprising the step of abutting the end of the anchor bolt protruding from the earth formation with a predetermined force such that turning of the nut on the end of the anchor bolt will cause the anchor bolt to turn in the hole formation.