Patents Represented by Attorney Melvin A. Crosby
  • Patent number: 4092054
    Abstract: A sealing arrangement for a rolling cutter designed to protect the antifriction bearings disposed between a support shaft and a rotatable outer body of the rolling cutter. A sealing arrangement is provided comprising at least two seal means located outward from the antifriction bearing of a rolling cutter and further comprising a cavity means between the two seal means so that flushing coolant, fluid or grease may be injected into the sealing arrangement and, when injected, will carry heat, dirt and other contaminants outward and away from the interior of a rolling cutter thereby preventing damage to the antifriction bearings and the seal means located nearest to the antifriction bearings.
    Type: Grant
    Filed: July 24, 1975
    Date of Patent: May 30, 1978
    Assignee: Subterranean Tools Inc.
    Inventor: James H. Dye
  • Patent number: 4069880
    Abstract: An excavation tool, specifically, a down-the-hole bit which reduces a formation by being impacted axially against a formation while rotating and through which a supply of fluid, such as air, is supplied through a passage in the bit to the working face thereof to blow away the material taken by the bit and wherein the working face of the bit is provided with grooves extending outwardly from the lower end of the fluid supply passage to the periphery of the bit and in communication with axial grooves formed in the bit. The provision of the grooves in the working end of the bit in communication with the axial grooves in the outer periphery of the bit greatly improves the removal of debris which accumulates at the bottom of the hole being drilled and increases the efficiency of the bit.
    Type: Grant
    Filed: May 24, 1973
    Date of Patent: January 24, 1978
    Assignee: Kennametal Inc.
    Inventors: David C. Johnstone, John F. Kita
  • Patent number: 4068976
    Abstract: A cutting insert, especially for milling cutters or the like, which is receivable in a holder and which insert has linear edge portions which meet at the corners of the insert. The insert is indexable in the holder to present a selected edge to work to be done. Each of the edges of the inserts are serrated or notched with respective edges embodying different numbers of serrations or notches so that the inserts can be arranged in the holder to cut completely across a surface with each insert taking only a portion of the surface.
    Type: Grant
    Filed: June 29, 1976
    Date of Patent: January 17, 1978
    Assignee: Kennametal Inc.
    Inventor: Ernest J. Friedline
  • Patent number: 4050355
    Abstract: An indexing device for indexing a member, such as a table, into operative working positions in which the table carries follower elements, such as rollers, and cooperating therewith is a drive member mounted on a pair of parallel equal length arms which rotate in unison thereby causing the drive member to take an orbital path. The drive member is slotted and during travel along the orbital path picks up one of the followers on the table and therethrough causes the table to carry out an indexing movement. The indexing movement of the table is smooth and does not involve movement of the table at excessive speeds.
    Type: Grant
    Filed: August 16, 1976
    Date of Patent: September 27, 1977
    Assignee: Kennametal Inc.
    Inventor: Karl G. Niskanen
  • Patent number: 4050525
    Abstract: A down-the-hole hammer of the type adapted for receiving a bit at the lower end and for being connected to the lower end of a drill string through which compressed air is supplied to the hammer. The supply of air to the hammer when the bit at the lower end is resting on the bottom of the hole causes a piston in the hammer to reciprocate and to beat upon the upper end of the bit so that the material at the bottom of a hole is reduced. The piston, by reciprocating in the hammer, accomplishes the valving of the fluid which causes the piston to reciprocate, and when the hammer is lifted from the bottom of the hole and the bit moves downwardly, the piston ceases reciprocation while air blows off through the bit to the bottom thereof to clear debris from the hole being drilled.
    Type: Grant
    Filed: September 2, 1976
    Date of Patent: September 27, 1977
    Assignee: Kennametal Inc.
    Inventor: John F. Kita
  • Patent number: 4041812
    Abstract: A shield element for deflecting chips and the like in which the shield element is in the form of a transparent, preferably, plastic member and, preferably, concave toward the source of chips and is adapted for mounting directly on the tool taking the chips.
    Type: Grant
    Filed: June 29, 1976
    Date of Patent: August 16, 1977
    Inventors: Joseph F. Jioio, Willis Howard Gardner
  • Patent number: 4042268
    Abstract: Manufacture of latch or lock set by cutting, from an extrusion of indefinite length, a portion sufficient to constitute a door lever; creating a rectangular-section barrel at one end of said portion, said barrel having a right-cylindrical recess therein; placing a square-section hollow insert in said recess, said insert having laterally directed tongues; assembling said door with a back plate so that the barrel extends through the back plate; connecting a lever-biasing spring both to the barrel and to the back plate; and securing the lever to the back plate by means of a combined D-plate and locking washer which has an aperture therein which is complementary to the barrel section, said D-plate locking washer also having lugs angled to permit them to slide along the barrel in one direction and to cause them to dig into the barrel to prevent movement in the opposite direction along the barrel.
    Type: Grant
    Filed: April 30, 1975
    Date of Patent: August 16, 1977
    Inventor: George Albert Carl Coglan
  • Patent number: 4036095
    Abstract: The present invention concerns anarrangement for shearing blades employing cemented hard carbide material inserts for use in shearing machines of both the rotary and guillotine type.
    Type: Grant
    Filed: February 12, 1975
    Date of Patent: July 19, 1977
    Assignee: Kennametal Inc.
    Inventors: Joseph B. Huber, Thomas A. Brown
  • Patent number: 4020728
    Abstract: An electronic organ having an automatic pedal keying circuit in which a selected pattern of pedal voice notes is played in response to depression of only a single key, which may be a pedal key. When the automatic circuit is effective, normal pedal voice keying operations are disabled, and pedal voices will be keyed in a selected pattern occurring in a timed sequence. The organ is selectively adjustable between a normal playing mode and the playing mode according to the present invention.
    Type: Grant
    Filed: October 24, 1975
    Date of Patent: May 3, 1977
    Assignee: Kimball International, Inc.
    Inventors: John William Robinson, Patrick King Doane
  • Patent number: 4018112
    Abstract: A machine tool having an indexable turret in which the turret has a plurality of stations for supporting tools and with the tools in the stations being presented individually to workpiece operating position in a respective indexed position of the turret during a work cycle. At least two of the stations of the turret are provided with identical tools, forming a group, and on each work cycle one of the pair of stations is bypassed thereby providing a reserve tool which can be made effective without interrupting the work cycle of the machine. Advantageously, most of the tools carried by the turret are provided in groups so that substantially a complete set of reserve tools is provided. Each tool can be used for a certain number of work cycles, or the machine can be provided with adaptive, or tool sensing, controls which sense the dulling or breaking of a tool, or workpieces taken from the machine can be periodically guaged to determine when a particular tool has worn down to the allowable limit.
    Type: Grant
    Filed: November 29, 1974
    Date of Patent: April 19, 1977
    Assignee: Kennametal Inc.
    Inventors: James W. Heaton, Donald W. Warren, Albert B. Albrecht
  • Patent number: 4009725
    Abstract: A grooming device in the form of a comb element, especially a pocket comb element, having coarse teeth on one end and fine teeth on the other end and a back portion extending along the root ends of the teeth. A brush element is carried on the comb near the inner ends of the fine teeth so that the comb can serve for combing the hair but, also, for brushing. The comb element may also have stiff bristles for use as a nail brush, or an additional nail brush element can be provided. The back portion of the comb may also carry a mirror element and/or a strip of abrasive material or a file element and may also be recessed for detachably receiving a coin, such as a dime. The comb may have a pocket clip connected to the back portion.
    Type: Grant
    Filed: July 3, 1975
    Date of Patent: March 1, 1977
    Inventor: Fred E. Stuart
  • Patent number: 4000428
    Abstract: An electronic switch in which first, second and third transistors are arranged in a group and provide for switching signals from a supply thereof to a signal buss. The source of signals is supplied to the base of the first transistor and from the emitter thereof to the base of the third transistor. The emitter of the third transistor is connected to the signal buss. The second transistor is connected between the signal path leading from the emitter of the first transistor to the base of the third transistor to ground and is controlled as to conductivity by the selective supply of voltage signals to the base thereof. The signal path from the source of signals to the signal buss is characterized in extremely low impedance when the switch is `ON` and in extremely high impedance when the switch is `OFF`, with the switch operating between on and off conditions extremely rapidly.
    Type: Grant
    Filed: June 2, 1975
    Date of Patent: December 28, 1976
    Assignee: Visual Information Institute, Inc.
    Inventor: John H. Harshbarger
  • Patent number: 3997934
    Abstract: A dirt runner, such as those used on street sweeping machines and the like, and a flexible support for the dirt runner to be attached to a housing portion. Flexible supports such as elongate strips of elastomeric material are fastened along the upper portion of the strips to the housing portion of the machine and the dirt runner is fastened along the lower portion of the elastomeric strip. The dirt runner is adequately supported to be driven in its longitudinal direction of travel and more freely flexible in lateral directions to its direction of travel. The dirt runner is uniquely designed to accommodate the additional feature of the flexible means such that the dirt runner and flexible means may be substituted directly to the existing street sweeper machines without modification thereof.
    Type: Grant
    Filed: April 10, 1975
    Date of Patent: December 21, 1976
    Assignee: Kennametal Inc.
    Inventor: Leonard E. Toews
  • Patent number: 3995782
    Abstract: A pulverizing device is disclosed wherein selected members of the device that are subjected to extreme wear conditions are provided protection from wear by, in some cases, forming the member of the hard wear resistant material and structurally attaching it in the machine or, in other cases, covering the member with a sheet of hard wear resistant material and structurally fastening said sheet in the machine.
    Type: Grant
    Filed: May 22, 1975
    Date of Patent: December 7, 1976
    Assignee: Kennametal Inc.
    Inventors: Dennis J. Shallenberger, Charles E. Hill
  • Patent number: 3994770
    Abstract: Waste paper is treated to recover the fiber content thereof in a clean condition and without damaging the fibers by shredding the paper, admixing the paper with a treatment agent, retaining the paper and admixed treatment agent in a treatment zone for a period of time during which the paper is substantially completely disintegrated in the treatment agent, diluting the mixture, and processing the mixture through further treatment stations to a final flotation stage wherein the now clean fibers are separated from the liquid whereby the fibers can then be used in a further papermaking operation.
    Type: Grant
    Filed: July 25, 1974
    Date of Patent: November 30, 1976
    Assignee: J. M. Voith GmbH
    Inventor: Heinz Lausch
  • Patent number: 3994773
    Abstract: A headbox for a papermaking machine or the like in which material, such as supension, flows from the headbox between upper and lower lips and through a discharge slot defined by the lips to a wire or a like receiver. The upper lip is reinforced by a beam extending along the upper lip on top of the lip while a detector is provided for detecting deflection of the upper lip due to the forces exerted thereon by material flowing between the lips. The detector is arranged to emit signals in conformity with deflection of the upper lip and correcting influences can be initiated in conformity with the emitted signals to compensate for the aforementioned deflection.
    Type: Grant
    Filed: February 24, 1975
    Date of Patent: November 30, 1976
    Assignee: J. M. Voith GmbH
    Inventors: Karl Wolf, Dieter Egelhof
  • Patent number: 3992973
    Abstract: A pulse generator especially for an electronic musical instrument in which a "D" type flip-flop is employed with the logic level at the data input thereof being transferred to the output in conformity with the supply to the clock input of a fixed frequency rectangular wave and the supply to the clear input of a rectangular wave having a frequency which is a whole multiple of the fixed frequency. The output at the output terminal of the flip-flop is a pulse having a duty cycle of predetermined length. The pulses at the output terminal are, of course, repetitive and remain at the same duty cycle without variation. By using a plurality of the flip-flops, each having respective inputs to the clock and clear terminals, a desired range of pitches can be generated.
    Type: Grant
    Filed: September 18, 1974
    Date of Patent: November 23, 1976
    Assignee: Kimball International, Inc.
    Inventor: Stephen L. Howell
  • Patent number: 3992969
    Abstract: An electronic organ having voice selector means and a memory arrangement connected to the voice selector means which can be preset and which is under the control of preset switches. Each preset switch, when actuated, makes a respective preselected group of one or more voices effective while making the others of the voices ineffective. The preselected voices in any group can be varied at the will of the player.
    Type: Grant
    Filed: June 18, 1975
    Date of Patent: November 23, 1976
    Assignee: Kimball International, Inc.
    Inventors: John William Robinson, Billy Joe Whittington
  • Patent number: 3992253
    Abstract: A papermaking machine of the Fourdrinier type having a machine wire which passes about a breast roll adjacent a head box and which passes around a further curved guide member spaced from the breast roll and about which guide member there is also entrained a belt in the form of a felt or additional wire. Beneath the machine wire between the breast roll and the curved guide member is a suction region which is characterized in that it is free of any wire supports or the like which would create pressure impulses in the suspension on the wire, which pressure impulses would interfere with the formation of the paper sheet.
    Type: Grant
    Filed: June 12, 1974
    Date of Patent: November 16, 1976
    Assignee: J. M. Voith GmbH
    Inventor: Christian Schiel
  • Patent number: 3990339
    Abstract: An electric organ with logic circuitry incorporated therein which will automatically cause "fill notes" to sound in the solo part of a composition being played with the fill notes being harmonically consistant with the notes being played in the solo part of the composition and with the chords played in the accompaniment part of the composition.
    Type: Grant
    Filed: October 23, 1974
    Date of Patent: November 9, 1976
    Assignee: Kimball International, Inc.
    Inventors: John William Robinson, Stephen L. Howell