US3588411A - Power tool switch and speed control with control elements mounted in recesses in the tool handle - Google Patents

Power tool switch and speed control with control elements mounted in recesses in the tool handle Download PDF

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Publication number
US3588411A
US3588411A US3588411DA US3588411A US 3588411 A US3588411 A US 3588411A US 3588411D A US3588411D A US 3588411DA US 3588411 A US3588411 A US 3588411A
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US
United States
Prior art keywords
appliance
handle
switch
contact
recesses
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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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English (en)
Inventor
Edgar A P Milcoy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cooper Industries LLC
Arrow Hart Inc
Original Assignee
Arrow Hart Inc
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Filing date
Publication date
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Application granted granted Critical
Publication of US3588411A publication Critical patent/US3588411A/en
Assigned to COOPER INDUSTRIES, INC, A CORP.OF OHIO reassignment COOPER INDUSTRIES, INC, A CORP.OF OHIO ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: CROUSE-HINDS COMPANY
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/04—Cases; Covers
    • H01H13/08—Casing of switch constituted by a handle serving a purpose other than the actuation of the switch

Definitions

  • ABSTRACT In an electrically driven appliance of the kind 1 8 7 5% N M3 8 B .9 3 "3 L C S U 2 s 1.
  • a body serving as a housing for an electric driving motor and as a support for a member driven by the motor, and a manually operable controls means mounted on or in the H0111 9/06, HOlh 13/08 [51] hit.
  • a component part of the body of the appliance is formed as an electrically insu- 200/157; 310/50, 68.1; 318/345 (Cursory) lating casing in which individual elements of said control means are mounted.
  • the component part may be a handle of the appliance and the elements of said control means may in- 200/157 clude elements of a switch and a device for controlling the 200/16 speed of the motor of the appliance.
  • This invention relates to an electrically driven portable appliance of the kind comprising a body serving as a housing for an electric driving motor and as a support for a member driven by the motor, and manually operable electric control means mounted on or in the body for controlling operation of the motor.
  • the driven member is a tool or tool holder, for example drilling machines, sanding machines, grinding machines, sawing machines and power screwdrivers.
  • Other examples of such appliances are hair dryers and food mixers.
  • a portable appliance of the kind referred to the body In use of a portable appliance of the kind referred to the body is held by the user and it is customary to form part of the body as a handle which can be grasped by the user.
  • This handle may be formed integrally with the remainder of the body of the appliance or it may be removably secured to the latter.
  • the electric control means of a portable appliance of the kind referred to is usually either a simple on-off" switch or a combined switch and speed control device, for example an electronic speed control device.
  • This control means is manufactured as a separate unit comprising an electrically insulating casing housing switch contacts or other circuit control elements, which casing is mounted in some part of the body of the portable appliance at the time of assembly of .the latter.
  • a switch casing in a suitably shaped recess in the aforesaid handle, the switch usually being in the form of a trigger switch having its actuating trigger disposed in a convenient position for operation by a finger of a hand grasping the handle.
  • One object of the present invention is to provide a method of manufacturing an electrically driven portable appliance of the kind referred to which is more economical thanhitherto known methods of manufacturing such portable appliances.
  • a method of manufacturing an electrically driven portable appliance of the kind referred to comprises the step of mounting individual elements of said control means in an electrically insulating casing which forms a part of the body of the portable appliance.
  • a component part of the body of an electrically driven appliance of the kind referred is formed as an electrically insulating casing in which individual elements of said control means are mounted.
  • said component'part may form at least a part of the handle or one of the handles.
  • the handle may be formed in at least two parts adapted to be secured together with any suitable fixing means,-for example screws or rivets, these parts of the handle being shaped so that when assembled together they enclose the elements of said control means, for example switch contacts, in suitable recesses within the handle,.
  • Such a handle may be removably secured to the remainder of the body of the appliance in any suitable way.
  • the circuit control elements may be connected within the handle to one part of a separable electrical connector, for example a conventional plug and socket connector, the other part of which is mounted in the remainder of the body of the appliance.
  • a separable electrical connector for example a conventional plug and socket connector, the other part of which is mounted in the remainder of the body of the appliance.
  • the cable for supplying electricity to the portable-appliance may be led into the handle at any convenient point and the handle may incorporate conventional means for gripping the cable.
  • the electric control means comprises an electrically insulating casing which houses circuit control elements, and said casing forms a part of the body of the portable appliance.
  • Said casing which may form at least part of a handle of theappliance, may be formed integrally with the remainder of the body of the appliance or it may be removably secured to the remainder of the body of the appliance.
  • FIG. 1 is a schematic side view of one embodiment of a portable electrically driven appliance in accordance with the invention, the appliance illustrated being a portable drilling machine,
  • FIG. 2 is an enlarged end elevation of the handle of the appliance of FIG. 1,'viewed in the direction of the arrow A in F IG. 1, and
  • FIGS is a view taken on the line Ill-III of FIG. 2.
  • the portable drilling machine shown in FIG. 1 comprises a body, generally-indicated by the numeral 1, which includes a casing 2 and ahandle 3 which is removably secured to the casthe letter O.
  • the handle 3 (see FIGS. 2 and 3) is formed as a two-part casing of moulded electrically insulating material, the two handle parts 7a 7b being connected together by any suitable fixing means, for example screws 8. g
  • the handle part 70 serves as a base for the reception of circuit control elements for the motor M.
  • circuit control elements include a trigger switch, generally designated by the numeral 9, and a diode 10.
  • the switch-9 comprises an actuating member 1 1 which is made of electrically insulating material and comprises a manually operable trigger lla joined to a slide b.
  • the trigger 11a is received in a recess 12 in the bandle part 7a and the slide llb is received in a channel '13 forming an extension of the recess 12 in the handle part 7a.
  • a helical spring 14 normally urges the actuating member 11 into the position shown in FIG. 3, in which a stop 15 on the trigger Ila bears against the end of a plunger 16 mounted in the handle part 7b (see FIG.2).
  • the slide 11b of the actuating member 11 supports two metallic bridging members 17, 18 which are received in slots 19, 20, respectively, disposed transversely with respect to the slide 11b.
  • the numerals 21 and 22 designate two metallic strip contacts mounted in grooves 23, 24 formed in the handle part 7a. Limbs 21a and 22a of these contacts are disposed in recesses 25,26, respectively in the handle part 7a and the bared conductors 27, 28 of a two-core cable 29 engage the contact limbs 21a, 22a within the recesses 25, 26. Flexible metallic strips 30, 31 housed in the recesses 25, 26, respectively, maintain the bared conductors 27, 28 in firm contact with the limbs 21a, 22a.
  • the cable 29 is led into the handle part 7a through a bushing 32 and the cable is clamped in the handle part 7a by a conventional cable clamp 33.
  • the contacts 21, 22 comprise further limbs 21b and 22b, respectively, which are disposed flush with the vertical wall 13a of the channel 13.
  • the contacts 34 and 35 comprise limbs 34a and 35a respectively, which are housed in a recess 40 in the handle part 7a.
  • the contact limb 35a and a limb 36a of the contact 36 extend into recesses 41, 42 respectively, in the handle part 7a. In these recesses the limbs 35a and 36a make electrical contact with bent flexible metallic strips 43, 44, respectively, which are housed in the recesses 41, 42, respectively.
  • the prongs 45, 46 are mounted on an electrically insulating support (not shown) in the casing 2 and are connected to leads (not shown) for conducting current to the motor M.
  • the contact 36 comprises a further limb 36b which is disposed flush with the vertical wall 13b of the channel 13 pposite to the limb 22b of contact 22.
  • the bridging member 17 makes contact with the contact limbs 21b and 34b and the bridging member 18 makes contact with the contact limbs 22b and 36b.
  • This establishes a connection from the conductor 27 to the prong 45 via the contact 21, the bridging member 17, the contact 34, the diode 10, the contact limb 35a and the strip 43.
  • a connection is also established from the conductor 28 to the prong 46 via the contact 22, the bridging member 18, the contact 36 and the strip 44.
  • Current is thus supplies to the motor M in series with the diode and the motor M runs at a speed lower than full speed.
  • the bridging member 17 makes contact with the contact limbs 21b and 35b and the bridging member 18 makes contact with the contact limbs 22b and 36b. This establishes connections between the conductors 27, 28 and the prongs 45, 46, respectively, without the diode 10 in circuit and the motor M runs at full speed.
  • the plunger 16 may be adapted in known to lock the trigger lla in either of the positions H and F.
  • the handle part 7b serves as a cover for the handle part 7a and to retain the various parts of the switch 9 in their respective recesses, channel and grooves in the handle part 7a.
  • the handle 3 may form an integral part of the casing 2 and the circuit control elements for the motor M may take other forms than the switch 9 and diode 10. Again, the handle 3 may form part of a portable electrical appliance other than a drilling machine.
  • An insulating shell member comprising one exterior housing-part of a plural-part housing for a portable electrical appliance, in combination with a first wire terminal member for connection of a power conductor wire, said terminal member being mounted directly on and being held firmly within a first recess in said shell member by engagement with the walls thereof, fixed switch contact members mounted directly on and within a recess in said shell member, a switch operating member supported slidably within and guided by a recess in said shell member, a movable switch contact member carried by said switch operating member and movable to engage said fixed switch contact members, a third switch contact member within and held by the walls of a third recess in said shell member, said movable switch contact member when in one position engaging said first two fixed contact members and when in another position engaging one of said two fixed contact members and said third fixed co ntact member, solid state power-control means mounted within said shell member and connected to at least one of said fixed contact members for controlling the power delivery in one of said positions of said movable contact member, said mov

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  • Food-Manufacturing Devices (AREA)
  • Switch Cases, Indication, And Locking (AREA)
US3588411D 1967-07-14 1968-07-03 Power tool switch and speed control with control elements mounted in recesses in the tool handle Expired - Lifetime US3588411A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3243567 1967-07-14
US74241168A 1968-07-03 1968-07-03

Publications (1)

Publication Number Publication Date
US3588411A true US3588411A (en) 1971-06-28

Family

ID=26261374

Family Applications (1)

Application Number Title Priority Date Filing Date
US3588411D Expired - Lifetime US3588411A (en) 1967-07-14 1968-07-03 Power tool switch and speed control with control elements mounted in recesses in the tool handle

Country Status (2)

Country Link
US (1) US3588411A (enrdf_load_stackoverflow)
GB (1) GB1229198A (enrdf_load_stackoverflow)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3703646A (en) * 1970-12-11 1972-11-21 Murphy Ind Inc G W Electric tool with trigger switch and lock-out arrangement
US3766348A (en) * 1972-04-24 1973-10-16 Arrow Hart Inc Two part casing for trigger switch with one part mounting all switch contact members
JPS5028864U (enrdf_load_stackoverflow) * 1973-07-07 1975-04-02
US4054766A (en) * 1976-01-15 1977-10-18 Rockwell International Corporation Portable tool switch structure
US4097703A (en) * 1977-08-05 1978-06-27 The Singer Company Trigger switch and lock mechanism therefore
US4097705A (en) * 1977-08-05 1978-06-27 The Singer Company Quick lock-release mechanism for a trigger switch
US4118614A (en) * 1976-07-02 1978-10-03 Robert Bosch Gmbh Multiple-function, hand-actuated switch unit, particularly for electrical hand tools or appliances and the like
US4220901A (en) * 1978-09-27 1980-09-02 Eaton Corporation Half and full wave energizing system for permanent magnet D.C. motors
US4314170A (en) * 1979-03-02 1982-02-02 Lucerne Products, Inc. Hand power tool control unit
DE3721415A1 (de) * 1987-06-29 1989-01-12 Hilti Ag Elektrowerkzeug
EP1212959A3 (de) * 2000-12-06 2003-05-21 WIK Far East Ltd. Elektrisches Haarpflegegerät
US20070062005A1 (en) * 2005-09-16 2007-03-22 Robert Bosch Gmbh Handle for power tool
US20100018006A1 (en) * 2008-07-28 2010-01-28 Psion Teklogix Inc. Removable pistol grip for a portable terminal
WO2024079566A1 (en) * 2022-10-12 2024-04-18 Esab Ab Pistol grip for a processing torch, a torch and a method

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2155686C2 (de) * 1971-11-09 1982-08-12 Hilti AG, 9494 Schaan Elektrowerkzeug
JPS562386U (enrdf_load_stackoverflow) * 1971-11-09 1981-01-10
JPH0871934A (ja) * 1994-08-30 1996-03-19 Max Co Ltd ネジ締め機におけるスイッチのロック機構
GB2304302A (en) * 1995-08-18 1997-03-19 Athir Hassan Multi-function power tool

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3703646A (en) * 1970-12-11 1972-11-21 Murphy Ind Inc G W Electric tool with trigger switch and lock-out arrangement
US3766348A (en) * 1972-04-24 1973-10-16 Arrow Hart Inc Two part casing for trigger switch with one part mounting all switch contact members
JPS5028864U (enrdf_load_stackoverflow) * 1973-07-07 1975-04-02
US4054766A (en) * 1976-01-15 1977-10-18 Rockwell International Corporation Portable tool switch structure
US4118614A (en) * 1976-07-02 1978-10-03 Robert Bosch Gmbh Multiple-function, hand-actuated switch unit, particularly for electrical hand tools or appliances and the like
US4097703A (en) * 1977-08-05 1978-06-27 The Singer Company Trigger switch and lock mechanism therefore
US4097705A (en) * 1977-08-05 1978-06-27 The Singer Company Quick lock-release mechanism for a trigger switch
US4220901A (en) * 1978-09-27 1980-09-02 Eaton Corporation Half and full wave energizing system for permanent magnet D.C. motors
US4314170A (en) * 1979-03-02 1982-02-02 Lucerne Products, Inc. Hand power tool control unit
DE3721415A1 (de) * 1987-06-29 1989-01-12 Hilti Ag Elektrowerkzeug
EP1212959A3 (de) * 2000-12-06 2003-05-21 WIK Far East Ltd. Elektrisches Haarpflegegerät
US20070062005A1 (en) * 2005-09-16 2007-03-22 Robert Bosch Gmbh Handle for power tool
US7424768B2 (en) * 2005-09-16 2008-09-16 Credo Technology Corporation Handle for power tool
US20100018006A1 (en) * 2008-07-28 2010-01-28 Psion Teklogix Inc. Removable pistol grip for a portable terminal
US7877841B2 (en) * 2008-07-28 2011-02-01 Psion Teklogix Inc. Removable pistol grip for a portable terminal
WO2024079566A1 (en) * 2022-10-12 2024-04-18 Esab Ab Pistol grip for a processing torch, a torch and a method

Also Published As

Publication number Publication date
GB1229198A (enrdf_load_stackoverflow) 1971-04-21

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Legal Events

Date Code Title Description
AS Assignment

Owner name: COOPER INDUSTRIES, INC, 1001 FANNIN, HOUSTON, TEXA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CROUSE-HINDS COMPANY;REEL/FRAME:004103/0954

Effective date: 19830223