US3085169A - Speed-setting indicators for portable electric tools - Google Patents

Speed-setting indicators for portable electric tools Download PDF

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Publication number
US3085169A
US3085169A US10681A US1068160A US3085169A US 3085169 A US3085169 A US 3085169A US 10681 A US10681 A US 10681A US 1068160 A US1068160 A US 1068160A US 3085169 A US3085169 A US 3085169A
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United States
Prior art keywords
speed
portable electric
knob
setting element
cutter
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US10681A
Inventor
George J Abel
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Diehl Manufacturing Co
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Diehl Manufacturing Co
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Filing date
Publication date
Application filed by Diehl Manufacturing Co filed Critical Diehl Manufacturing Co
Priority to US10681A priority Critical patent/US3085169A/en
Priority to GB5019/61A priority patent/GB911561A/en
Priority to FR853436A priority patent/FR1286944A/en
Application granted granted Critical
Publication of US3085169A publication Critical patent/US3085169A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • H01H9/06—Casing of switch constituted by a handle serving a purpose other than the actuation of the switch, e.g. by the handle of a vacuum cleaner
    • H01H9/061—Casing of switch constituted by a handle serving a purpose other than the actuation of the switch, e.g. by the handle of a vacuum cleaner enclosing a continuously variable impedance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B45/00—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor
    • B23B45/02—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor driven by electric power
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D49/00—Machines or devices for sawing with straight reciprocating saw blades, e.g. hacksaws
    • B23D49/10—Hand-held or hand-operated sawing devices with straight saw blades
    • B23D49/16—Hand-held or hand-operated sawing devices with straight saw blades actuated by electric or magnetic power or prime movers

Definitions

  • the invention comprises the devices, combinations and arrangements of parts hereinafter set forth and illustrated in the accompanying drawings of a preferred embodiment of the invention, from which the sev eral features of the invention and the advantages attained thereby, will be readily understood by those skilled in the art.
  • FIG. 1 is a side elevational view of a portable electric tool having a portion cut away to show a speed-setting element embodying the invention.
  • FIG. 2 is an enlarged plan view of the speed-setting indicator shown in FIG. 1.
  • FIG. 3 is a vertical sectional view, partly in elevation, taken on the line 33 of FIG. 2.
  • FIG. 4 is a plan view, partly in section, taken on the line 44 of FIG. 3.
  • FIG. 5 is a plan view, partly in section, taken on the line 55 of FIG. 3.
  • FIG. 1 shows a portable electric drill having a built-in speed regulating control system of the type shown and described in the United States patent application Serial No. 215, filed January 4, 1960. It is sufficient for the purposes of this invention to point out that 11 designates the speed-setting potentiometer resistance as shown in the reference structure.
  • the potentiometer 11 is mounted on the handle portion 12 of the drill 1t) and is secured thereon by a nut 13 threaded onto a stud portion 14, as seen best in FIG. 3.
  • a knob 15 is secured to the potentiometer shaft 16 by means of a set-screw 17 and provides means for manually adjusting the setting of the potentiometer 11 and thus for controlling the cutter speed corresponding thereto.
  • a rotatable index disc 18 is formed with a central circular apertured portion 19 which engages a raised boss 20 formed on the handle portion 12 to provide a bearing structure therefor and thus to confine its movement to a rotary one about the axis of the shaft 16.
  • a cup 21 pressed into the wall of the handle portion contains a compression spring 22 and a ball 23 urged out of said cup but retained therein by a spun-over edge 24 of the cup.
  • the ball 23 cooperates with depressions 25 made in the under face of the index disc 18 to provide a detent for indexing said disc to several predetermined angular positions.
  • stop pins 26 screwed into the disc 18 cooperate with arcuate slots 27 in the handle portion 12, as seen best in FIG. 4.
  • a stationary index mark 28 on the handle portion 12 cooperates with indicia 29 in the form of depressed dots on the index disc 18 corresponding to the material (plastic, wood, steel) to be cut, to provide a movable index means for the knob 15 to effect recalibration of the potentiometer in accordance with the different materials selected.
  • Indicia 30 in the form of depressed dots corresponding to cutter size (in this case drill bit diameters) cooperate with an index mark 31 on the knob 15 to provide means for setting the potentiometer to correspond to a predetermined optimum speed for the material and cutter size so selected.
  • index mark 28 and indicia 29 are made in one color while index 31 and indicia 30 are made in another distinctly different color.
  • An adjustable speed-setting element for a portable electric tool having attachable cutter elements of various sizes, a commutator motor having series-connected field and armature windings and a speed-regulating control system for said motor, comprising knob and pointer means for adjusting said element, and a normally stationary index plate carrying indicia of material kind and cutter size cooperating with said knob and pointer means for adjusting said speed-setting element to a predetermined optimum speed corresponding to a selected material kind and cutter size, said index plate being movable selectively with respect to said speed-setting element to effect recalibration thereof in accordance with the kind of material to be cut.
  • An adjustable speed-setting element for a portable electric tool having attachable cutter elements of various sizes, a driving electric motor therefor and a speed-regulating system for said motor, comprising means for adjusting said speed-setting element including a knob, a normally stationary index plate, means for indexing said knob relatively to said plate and means for angularly moving said index plate relatively to a stationary index in accordance with the kind of material to be cut.
  • a speed-setting indicator for a portable electric tool having a speed-regulating control system comprising a 3 4 spiedsetting element, a shaft for adjusting the element, References Cited in the file of this patent a nob secured to said shaft, an index plate selectively rotatable about the axis of said shaft, first indicia carried UNITED STATES PATENTS by said index plate corresponding to kind of material 1,522,634 Klosner Jan. 13, 1925 and second indicia carried by said index plate correspond- 5 1,536,710 Greene May 5, 1925 ing to cutter size, stationary marker means cooperating 2,671,191 Braski Mar.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)
  • Sawing (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)

Description

April 9, 1963 G. J. ABEL 3,085,169
SPEED-SETTING INDICATORS FOR PORTABLE ELECTRIC TOOLS Filed Feb. 24, 1960 IN VENT OR, GEORGE J. ABEL.
BY. 7 I ziTTomm atent Patented Apr. 9, 1963 Free ' 3,085,169 SPEED-SETTING INDICATORS FOR PORTABLE ELECTRIC TOOLS George J. Abel, Plainfield, N.J., assignor to Diehl Manufacturing Company, Somerville, N.J., a corporation of New Jersey Filed Feb. 24, 1960, Ser. No. 10,681 3 Claims. (Cl. 31068) This invention relates to speed-setting indicators for portable electric tools adapted to be used with cutters of various sizes for cutting different materials.
It is known that for each material and cutter size there exists an optimum speed for most eflicient removal of material. In a prior United States patent application Serial No. 215, filed January 4, 1960, a built-in speed regulating control system for a portable electric drill is described in which optimum speeds may be set by dialing a specific drill size for a single material. It is desirable to extend this speed settability to other materials ordinarily encountered and the present invention relates to means for its accomplishment.
It is an object of this invention to provide a speedsetting indicator for a portable electric tool having a speed-regulating control system whereby optimum cutting speeds for different cutter sizes and different materials may be conveniently preset.
With the above and other objects in view, as will hereinafter appear, the invention comprises the devices, combinations and arrangements of parts hereinafter set forth and illustrated in the accompanying drawings of a preferred embodiment of the invention, from which the sev eral features of the invention and the advantages attained thereby, will be readily understood by those skilled in the art.
In the drawings,
FIG. 1 is a side elevational view of a portable electric tool having a portion cut away to show a speed-setting element embodying the invention.
FIG. 2 is an enlarged plan view of the speed-setting indicator shown in FIG. 1.
FIG. 3 is a vertical sectional view, partly in elevation, taken on the line 33 of FIG. 2.
FIG. 4 is a plan view, partly in section, taken on the line 44 of FIG. 3.
FIG. 5 is a plan view, partly in section, taken on the line 55 of FIG. 3.
Referring to the drawings, FIG. 1 shows a portable electric drill having a built-in speed regulating control system of the type shown and described in the United States patent application Serial No. 215, filed January 4, 1960. It is sufficient for the purposes of this invention to point out that 11 designates the speed-setting potentiometer resistance as shown in the reference structure.
The potentiometer 11 is mounted on the handle portion 12 of the drill 1t) and is secured thereon by a nut 13 threaded onto a stud portion 14, as seen best in FIG. 3.
A knob 15 is secured to the potentiometer shaft 16 by means of a set-screw 17 and provides means for manually adjusting the setting of the potentiometer 11 and thus for controlling the cutter speed corresponding thereto.
A rotatable index disc 18 is formed with a central circular apertured portion 19 which engages a raised boss 20 formed on the handle portion 12 to provide a bearing structure therefor and thus to confine its movement to a rotary one about the axis of the shaft 16.
A cup 21 pressed into the wall of the handle portion contains a compression spring 22 and a ball 23 urged out of said cup but retained therein by a spun-over edge 24 of the cup. The ball 23 cooperates with depressions 25 made in the under face of the index disc 18 to provide a detent for indexing said disc to several predetermined angular positions. To limit the rotation of disc 18 to a practical range, stop pins 26 screwed into the disc 18 cooperate with arcuate slots 27 in the handle portion 12, as seen best in FIG. 4.
A stationary index mark 28 on the handle portion 12 cooperates with indicia 29 in the form of depressed dots on the index disc 18 corresponding to the material (plastic, wood, steel) to be cut, to provide a movable index means for the knob 15 to effect recalibration of the potentiometer in accordance with the different materials selected. Indicia 30 in the form of depressed dots corresponding to cutter size (in this case drill bit diameters) cooperate With an index mark 31 on the knob 15 to provide means for setting the potentiometer to correspond to a predetermined optimum speed for the material and cutter size so selected.
It will be understood that matched color coding may be used to facilitate convenience in use, in which case index mark 28 and indicia 29 are made in one color while index 31 and indicia 30 are made in another distinctly different color.
While the invention has been described herein as applied to portable electric drills it is not to be construed as so limited thereto but can readily be adapted to any portable electric tool wherein two predetermined variables have a direct influence on the optimum operating speed for the conditions imposed. Other possible applications, for example, are for a sabre saw and a belt sander. In these cases one variable would be the material to be sawed or sanded and the second variable would be the coarseness of the blade (teeth per inch) and the coarseness of the sandling belt, respectively,
Having thus set forth the nature of the invention, what I claim herein is:
1. An adjustable speed-setting element for a portable electric tool having attachable cutter elements of various sizes, a commutator motor having series-connected field and armature windings and a speed-regulating control system for said motor, comprising knob and pointer means for adjusting said element, and a normally stationary index plate carrying indicia of material kind and cutter size cooperating with said knob and pointer means for adjusting said speed-setting element to a predetermined optimum speed corresponding to a selected material kind and cutter size, said index plate being movable selectively with respect to said speed-setting element to effect recalibration thereof in accordance with the kind of material to be cut.
2. An adjustable speed-setting element for a portable electric tool having attachable cutter elements of various sizes, a driving electric motor therefor and a speed-regulating system for said motor, comprising means for adjusting said speed-setting element including a knob, a normally stationary index plate, means for indexing said knob relatively to said plate and means for angularly moving said index plate relatively to a stationary index in accordance with the kind of material to be cut.
3. A speed-setting indicator for a portable electric tool having a speed-regulating control system comprising a 3 4 spiedsetting element, a shaft for adjusting the element, References Cited in the file of this patent a nob secured to said shaft, an index plate selectively rotatable about the axis of said shaft, first indicia carried UNITED STATES PATENTS by said index plate corresponding to kind of material 1,522,634 Klosner Jan. 13, 1925 and second indicia carried by said index plate correspond- 5 1,536,710 Greene May 5, 1925 ing to cutter size, stationary marker means cooperating 2,671,191 Braski Mar. 2, 1954 With said first indicia for indexing said index plate in ac- 2,707,222 Brown et a1 Apr. 26, 1955 cordance with the kind of material to be cut, and marker 2,711,461 Happe June 21, 1955 means on said knob cooperating with said second indicia 2,857,533 Miller Oct. 21, 1958 for indexing said knob in accordance With the cutter size. 10 2,939,064 Momberg et a1. May 31, 1960

Claims (1)

1. AN ADJUSTABLE SPEED-SETTING ELEMENT FOR A PORTABLE ELECTRIC TOOL HAVING ATTACHABLE CUTTER ELEMENTS OF VARIOUS SIZES, A COMMUTATOR MOTOR HAVING SERIES-CONNECTED FIELD AND ARMATURE WINDINGS AND A SPEED-REGULATING CONTROL SYSTEM FOR SAID MOTOR, COMPRISING KNOB AND POINTER MEANS FOR ADJUSTING SAID ELEMENT, AND A NORMALLY STATIONARY INDEX PLATE CARRYING INDICIA OF MATERIAL KIND AND CUTTER SIZE COOPERATING WITH SAID KNOB AND POINTER MEANS FOR ADJUSTING SAID SPEED-SETTING ELEMENT TO A PREDETERMINED OPTIMUM SPEED CORRESPONDING TO A SELECTED MATERIAL KIND AND CUTTER SIZE, SAID INDEX PLATE BEING MOVABLE SELECTIVELY WITH RESPECT TO SAID SPEED-SETTING ELEMENT TO EFFECT RECALIBRATION THEREOF IN ACCORDANCE WITH THE KIND OF MATERIAL TO BE CUT.
US10681A 1960-02-24 1960-02-24 Speed-setting indicators for portable electric tools Expired - Lifetime US3085169A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US10681A US3085169A (en) 1960-02-24 1960-02-24 Speed-setting indicators for portable electric tools
GB5019/61A GB911561A (en) 1960-02-24 1961-02-10 Speed-setting indicators for portable electric tools
FR853436A FR1286944A (en) 1960-02-24 1961-02-21 Device for adjusting the speed of a portable power tool and indicating its adjustment value

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3179866A (en) * 1961-12-22 1965-04-20 Fastener Corp Electromagnetically operated tool
US3221192A (en) * 1962-10-11 1965-11-30 Porter Co H K Variable speed hand tool
US3439248A (en) * 1966-01-04 1969-04-15 Singer Co Trigger-actuated motor speed control and switching device having multiple selective positions for setting motor speeds
US3491259A (en) * 1968-01-04 1970-01-20 Stanley Works Variable speed portable electric hand tool
US3543212A (en) * 1967-12-12 1970-11-24 Singer Co Power control switching devices
US3611095A (en) * 1968-05-31 1971-10-05 Metabowerke Kg Speed control and overload protection device for an electric power tool
DE2817814A1 (en) * 1978-04-22 1979-10-31 Licentia Gmbh Electric drill with speed control - has selector for drilled material and for drill dia., controlling thyristor ignition voltage or time instant
US4292571A (en) * 1980-02-14 1981-09-29 Black & Decker Inc. Control device for controlling the rotational speed of a portable power tool
US4513381A (en) * 1982-06-07 1985-04-23 The Singer Company Speed regulator for power tool
US20040206519A1 (en) * 2002-12-19 2004-10-21 Ferdinand Kristen Electrical hand tool machine with non-contacting electrical manual control switch
WO2008002367A2 (en) * 2006-06-23 2008-01-03 Fci Americas Technology, Inc. Ram retraction selection
DE102007000533A1 (en) 2007-10-19 2009-04-23 Hilti Aktiengesellschaft Jig-saw e.g. hand compass saw, machine, has rotary knob manually adjustable from outside for adjusting reciprocating speed, and motor control unit provided with computing unit which contains step image of twisting angle of knob in speed

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1522634A (en) * 1922-10-16 1925-01-13 Klosner Morris Vernier instrument
US1536710A (en) * 1923-12-15 1925-05-05 Augustine E Greene Radiorheostat
US2671191A (en) * 1950-10-11 1954-03-02 Dormeyer Corp Electric motor control for food mixers
US2707222A (en) * 1954-03-15 1955-04-26 Brown Electro Measurement Corp Voltage divider
US2711461A (en) * 1953-12-24 1955-06-21 Singer Mfg Co Portable electric tool handle assemblies
US2857533A (en) * 1954-05-03 1958-10-21 Whirlpool Co Electric motor hand tool
US2939064A (en) * 1959-05-20 1960-05-31 Singer Mfg Co Motor control systems

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1522634A (en) * 1922-10-16 1925-01-13 Klosner Morris Vernier instrument
US1536710A (en) * 1923-12-15 1925-05-05 Augustine E Greene Radiorheostat
US2671191A (en) * 1950-10-11 1954-03-02 Dormeyer Corp Electric motor control for food mixers
US2711461A (en) * 1953-12-24 1955-06-21 Singer Mfg Co Portable electric tool handle assemblies
US2707222A (en) * 1954-03-15 1955-04-26 Brown Electro Measurement Corp Voltage divider
US2857533A (en) * 1954-05-03 1958-10-21 Whirlpool Co Electric motor hand tool
US2939064A (en) * 1959-05-20 1960-05-31 Singer Mfg Co Motor control systems

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3179866A (en) * 1961-12-22 1965-04-20 Fastener Corp Electromagnetically operated tool
US3221192A (en) * 1962-10-11 1965-11-30 Porter Co H K Variable speed hand tool
US3439248A (en) * 1966-01-04 1969-04-15 Singer Co Trigger-actuated motor speed control and switching device having multiple selective positions for setting motor speeds
US3543212A (en) * 1967-12-12 1970-11-24 Singer Co Power control switching devices
US3491259A (en) * 1968-01-04 1970-01-20 Stanley Works Variable speed portable electric hand tool
US3611095A (en) * 1968-05-31 1971-10-05 Metabowerke Kg Speed control and overload protection device for an electric power tool
DE2817814A1 (en) * 1978-04-22 1979-10-31 Licentia Gmbh Electric drill with speed control - has selector for drilled material and for drill dia., controlling thyristor ignition voltage or time instant
US4292571A (en) * 1980-02-14 1981-09-29 Black & Decker Inc. Control device for controlling the rotational speed of a portable power tool
US4513381A (en) * 1982-06-07 1985-04-23 The Singer Company Speed regulator for power tool
US20040206519A1 (en) * 2002-12-19 2004-10-21 Ferdinand Kristen Electrical hand tool machine with non-contacting electrical manual control switch
WO2008002367A2 (en) * 2006-06-23 2008-01-03 Fci Americas Technology, Inc. Ram retraction selection
WO2008002367A3 (en) * 2006-06-23 2008-11-13 Fci Americas Technology Inc Ram retraction selection
DE102007000533A1 (en) 2007-10-19 2009-04-23 Hilti Aktiengesellschaft Jig-saw e.g. hand compass saw, machine, has rotary knob manually adjustable from outside for adjusting reciprocating speed, and motor control unit provided with computing unit which contains step image of twisting angle of knob in speed
DE102007000533B4 (en) * 2007-10-19 2018-01-11 Hilti Aktiengesellschaft Hubsägemaschine with Hubzahleinstellung

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