US3590194A - Contact- and circuit-mounting board for trigger-operated switch unit - Google Patents

Contact- and circuit-mounting board for trigger-operated switch unit Download PDF

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Publication number
US3590194A
US3590194A US859277A US3590194DA US3590194A US 3590194 A US3590194 A US 3590194A US 859277 A US859277 A US 859277A US 3590194D A US3590194D A US 3590194DA US 3590194 A US3590194 A US 3590194A
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US
United States
Prior art keywords
contact
board
circuit
trigger
reversing lever
Prior art date
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
Application number
US859277A
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English (en)
Inventor
Carl J Frenzel
Alex F Gawron
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.)
Skil Corp
Original Assignee
Skil Corp
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Filing date
Publication date
Application filed by Skil Corp filed Critical Skil Corp
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Publication of US3590194A publication Critical patent/US3590194A/en
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Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/40—Contact mounted so that its contact-making surface is flush with adjoining insulation
    • H01H1/403—Contacts forming part of a printed circuit
    • 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
    • H01H9/063—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 reversing switch
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S388/00—Electricity: motor control systems
    • Y10S388/907—Specific control circuit element or device
    • Y10S388/917—Thyristor or scr
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S388/00—Electricity: motor control systems
    • Y10S388/935—Specific application:
    • Y10S388/937—Hand tool

Definitions

  • a primary object of the present invention is the provision of a new and improved contact and circuit-mounting board for a trigger-operated speed control switch or the like.
  • Another object of the invention is the provision of a mounting board of the type described wherein such board supports first and second contact means cooperating respectively with third and fourth contact means, the latter being carried by a reversing lever and the trigger, respectively.
  • Still another object of the present invention is the provision of a mounting board of the type described, wherein such mounting board includes contact strips arranged to be slidably engaged by contact fingers carried by the trigger, one of such fingers and oneof such strips defining a variable resistor forming part ofa speed control circuit.
  • Another object of the present invention is the provision of a new and improved mounting board according to the foregoing object, wherein a printed circuit board is secured to such mounting board, the printed circuit board carrying the contact strip which defines the variable resistor as well as the various circuit elements defining the speed control circuit.
  • FIG. I is a side elevational view of a trigger-operated switch unit embodying the present invention, with an outer housing member being removed to expose one side ofthe unitary contact and circuit mounting board;
  • FIG.-2 is a side elevational view similar to FIG. I with the mounting board being removed to expose the contacts carried I by the reversing lever and the trigger;
  • the trigger-operated switch unit of the present invention includes a housing member. generally designated 10, which has a sidewall 11, front and rear walls 12 and 14, respectively, and top and bottom walls 15 and 16, respectively.
  • This housing member includes an elongated guideway 18 slidably receiving a reversing lever or bar I9 of the type disclosed and claimed in Frenzel US. Pat. No. 3,260,827; it will be understood the reversing lever is slidably mounted for reciprocal movement longitudinally thereof.
  • the reversing lever mounts a pair of contact balls 21, 22.
  • the contact ball 21 is engaged by a spring 23, the latter being received in a blind bore formed in one side of the reversing lever 19. This spring urges the ball 21 into engagement with fixed contacts as will be explained hereinbelow. It will be understood that the mounting for the contact ball 22 is identical to thatjust described for the contact 21.
  • the housing includes a cavity 25, a portion of whichdefines a guideway 26 for slidably receiving the stem of a trigger 28.
  • the trigger includes a blind bore 29 (FIG. 4) receiving a coil spring 30, one end of which spring receives a pin-31. This pin is secured to the rear wall 14 of the housing '3.
  • the spring 30 acts to urge the trigger to its fully extended 3, this board is secured to the housing member position, Abutting engagement of trigger surface 32 with housing wall surface 320 serves as a stop to limit outward movement of the trigger.
  • the trigger may be provided with adjustable stop and lock means as disclosed and claimed in Frenzel US. Pat No. 3,309,484.
  • the trigger mounts an adjustment knob or button 33 which rotates a screw (not shown) in threading engagement with a lug 34 for moving the latter longitudinally of the trigger stem and relative thereto.
  • This lug which is ar ranged to abut stop means (not shown), acts as an adjustable stop to define the length of the trigger stroke.
  • This lug also includes a latch surface 34a adapted to be engaged by the locking pin 35 (FIG. 4) so as to lock the trigger in any of its I fullydepressed positions.
  • a locking button 36 is locking pin 35 and a coil spring 37 is provided locking button to its outermost position.
  • the trigger 28 carries a contact, generally designated 40,
  • contact which contact includes three contact fingers 41, 42 and 43. As will be explained herein, these contact fingers engage fixed contacts supported by the mounting board which forms part of the present invention. As noted in Flg. 4, the contact 40 is received within a slot 44 formed in the trigger stem. The tension of the contact fingers is such that the latter, by reason of their engagement with the fixed contacts to be referred to hereinbelow, serve to retain the contact 40 in slot 44 without the aid of fastening means.
  • the unitary contact and circuit mounting board of the present invention is generally designated 45. As noted in FIG. 10 and forms with the latter a closed housing space. Referring to FIG. 5, the mounting board 45 supports a horizontal row of equally spaced contacts 4650. Different pairs of these contacts are engaged by the contact balls 21, 22 in response to movement of the reversing lever 19 as will be explained below.
  • the mounting board 45 further supports a first contact strip 52, another contact strip 53, and acontact button 54. It will be understood that the contact finger 41 is arranged for wiping engagement with the contact strip 52 and that the contact finger 42 is arranged for sliding or wiping engagement with the contact strip 53. When the trigger is fully depressed, the finger 42 separates from the strip 53 and comes into engagement with the contact button 54,
  • a printed circuit board, generally designated 57, is secured, as by means of an adhesive, to the mounting board 45.
  • This circuit board is preferably of the type disclosed and claimed in the copending application of Conrad D. Robertson, Ser. No. 845,3 l7, filed July 28, I969, Case No. 690,503.
  • the circuit board 57 supports a contact strip 58 formed of resistance material; this strip is engaged by the contact finger 43 and cooperates with the latter to define a variable resistor.
  • the circuit board 57 also mounts (FIG. 6) a fixed resistor 59,
  • an unencapsulated capacitor 60 a chip-type diode 61, a chip type trigger device 62 and a chip-type semiconductor 63, such as a silicon controlled rectifier.
  • the electronic elements on such board define a nonfeedback type of speed control system as disclosed and claimed in Gawron US. Pat. No. 3,209,228.
  • the trigger-actuated switch is connected with a suitable motor of the reversible type having respective armature and field windings 65 and 66.
  • the switch unit when I "When-the reversing lever l9.is in its aforesaid Gawron' patent. 'Whenfthe trigger reaches its fully .iepressed position, the contact finger 42 separates from the V contact strip53 and comes into engagement with the contact button 54 thereby bypassing the speed control system and energizing the motor directly from line current to operate the motorat maximum speed.
  • the reversing lever 19 is provideld with apair of recesses 70. 71in the undersideqthe'reofQ A jlocklng ball-73 is received'in'a cavity 74 in'the trigger when the lattcr is in its i'ully extended position. The, the;trlg ger is:depressedf, thiscamrning surface75 comes'int'o' aengagementiwithuthe,lockingball-73 and urges thejlatter upi wiirdly into. engagement with either ,thcfrecessf70 'or 71, de-
  • the opening may lie-suitably plugged during final assembly otthe triggerractueted switch unit.
  • the unitary mounting boards! also su ports'a plurality ofprlnted contact strlps'and formations in 7 eluding strlpaf'ili flfto establish the appropriate current i r paths asindicatcd schemetically in FIG. 6.
  • the contact strips 81. 82 and llsrc' also su ports'a plurality ofprlnted contact strlps'and formations in 7 eluding strlpaf'ili flfto establish the appropriate current i r paths asindicatcd schemetically in FIG. 6.
  • the contact strips 81. 82 and llsrc' also su ports'a plurality ofprlnted contact strlps'and formations in 7 eluding strlpaf'ili flfto establish the appropriate current i r paths asindicatcd schemetically in FIG. 6.
  • the contact strips 81. 82 and llsrc' also su ports'a
  • thafprcscnt invention provides a unitary mounting besrd'whichsupports the contacts to provide the necessary switehin'gi bcth for "lorw'ardfi "reverse.” "enei'f” a. said unit including a housing; 7 5
  • a trigger movably. mounted bysaid housing; c. a reversinglever movably. mounted by said housing; d.-first andrseeond contact means in' said hou'sing and carried respectively by said trigger and said-reversing lever V for movement therewith; Y I ep mea'ns in said housing defining a unitary contact and cir- V cuitmountingboardi a I i f. third and fourth contactmeans fixed to said mounting board and arranged for respective engagement by said g i v firstand secondcontactmcans; Y
  • said fourth contact means being defined byfive contact members mounted on said'board in spaced relation from c eachothenand ic.
  • said pair of contactelements establishing a current path through said said first and second contact membcrs and another current path through said third and fourth'con tact members-when said reversing lever is in one positions I 'thereofl'said pair of contact elements establishinga cur" rent path through said second and third contact members and another current path through said fourth and fifth" contact members when said reversing leveris in the other.
  • V v 3. The improvement accordingto claim 1 further defined y g 7 v ,7
  • said third contact means lncludinga plurality of contact 1 i 7 strips on said board arranged for beingslidably engaged by respective contact fingers. 4.
  • said fingers and one of saidcontect strips cooperate to define a variable resistor forming part of a variable speed control circult constituting said that mentioned circuit.
  • this hoard supports a-circuit board which in turn mounts all of the electronlccompcnents to defi'ncaspced control systamManifa'stly.
  • the improvement accordlngto claim further defined asaid second contact means being defined by a pair dfcon- 6o tact elements carrled by the reversing lever;
  • said pairs of contact elements establishing a current path members mounted on said board in spacedreiation from through said tlrst and second contact members and anothsr'e'urrent path through ssidf'third and fourth con positions thereof, said pair of contact elements establish and fifth contact memberswhe'nzsaid reversing lever is in the other of its we positions;
  • said first contact means including a plurality of contact fingers carried by said trigger for movement therewith;
  • said fourth contact means being defined by five contact tact members when said reversing lever is inone of two 7 lng e currentpath through said second and third contact members and another current path through said fourth c.
  • said third contact means including a plurality of contact strips on said'board arranged for being slidably engaged by respective contact fingers.
  • a trigger-operated switch unit for installation in a portable electric tool or the like, the improvement comprising:
  • said unit including a housing
  • first and second contact means in said housing which are moved in response to movements of said trigger and said reversing lever, respectively;
  • said first contact means including a wiper finger; means in said housing defining a unitary contact and circuit mounting board;
  • third and fourth contact means fixed to said mounting board and arranged for respective engagement by said first and second contact means;
  • a printed circuit board secured by said mounting board other circuit elements on said board in direct physical contact therewith and cooperating with said second and fourth contact means to define a circuit for establishing the direction of rotation of the associated tool motor upon actuation of said reversing lever.

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  • Push-Button Switches (AREA)
  • Adjustable Resistors (AREA)
  • Control Of Direct Current Motors (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US859277A 1969-09-19 1969-09-19 Contact- and circuit-mounting board for trigger-operated switch unit Expired - Lifetime US3590194A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US85927769A 1969-09-19 1969-09-19

Publications (1)

Publication Number Publication Date
US3590194A true US3590194A (en) 1971-06-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
US859277A Expired - Lifetime US3590194A (en) 1969-09-19 1969-09-19 Contact- and circuit-mounting board for trigger-operated switch unit

Country Status (6)

Country Link
US (1) US3590194A (enrdf_load_stackoverflow)
CA (1) CA922775A (enrdf_load_stackoverflow)
DE (1) DE2046232A1 (enrdf_load_stackoverflow)
FR (1) FR2062268A5 (enrdf_load_stackoverflow)
GB (1) GB1290770A (enrdf_load_stackoverflow)
NL (1) NL7013709A (enrdf_load_stackoverflow)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3731027A (en) * 1970-03-18 1973-05-01 Kopp H Electrical press key device with thermic excess current release
US3761788A (en) * 1971-08-10 1973-09-25 Lucerne Products Inc Electronic switch module with ceramic case
US4734547A (en) * 1985-08-05 1988-03-29 Fujisoku Electric Co., Ltd. Reversing speed control switch
US5455886A (en) * 1994-05-26 1995-10-03 Ryobi Motor Products Corporation Electrical implement with variable speed control
US20120292067A1 (en) * 2011-05-19 2012-11-22 Black & Decker Inc. Electronic switching module for a power tool
US8493172B2 (en) 2011-09-30 2013-07-23 Snap-On Incorporated Variable speed toggle trigger
US20160301340A1 (en) * 2015-04-07 2016-10-13 Black & Decker Inc. Power tool with automatic feathering mode
WO2017097910A1 (de) * 2015-12-11 2017-06-15 Marquardt Verwaltungs-Gmbh Elektrischer schalter
US9847194B2 (en) 2014-03-28 2017-12-19 Black & Decker Inc. Integrated electronic switch and control module for a power tool
US10541588B2 (en) 2017-05-24 2020-01-21 Black & Decker Inc. Electronic power module for a power tool having an integrated heat sink
US10608501B2 (en) 2017-05-24 2020-03-31 Black & Decker Inc. Variable-speed input unit having segmented pads for a power tool

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2334013C3 (de) * 1973-07-04 1982-10-07 Metabowerke KG Closs, Rauch & Schnizler, 7440 Nürtingen Elektromotorisch angetriebene und mit einer Drehzahlregel- oder Steuerelektronik ausgerüstete Hans- oder Schlagbohrmaschine
DE2446796A1 (de) * 1974-10-01 1976-04-15 Lucerne Products Inc Vorrichtung zur steuerung der einer last zugefuehrten elektrischen energie
DE2824384C2 (de) * 1978-06-03 1984-12-20 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Handgeführtes Elektrowerkzeug mit einer im Handgriff untergebrachten Leiterplatte
DE2920066C2 (de) * 1979-05-18 1984-09-27 Metabowerke GmbH & Co, 7440 Nürtingen Elektrohandgerät mit einem für eine Drehrichtung optimierten Universalmotor
DE2928988C2 (de) * 1979-07-18 1982-06-09 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Elektromotorisch angetriebene Handbohrmaschine
DE3201036A1 (de) * 1982-01-15 1983-07-28 Black & Decker, Inc., 19711 Newark, Del. "schaltungsanordnung fuer den links- und rechtslauf von kollektormotoren"
NL194021C (nl) * 1988-12-07 2001-04-03 Capax B V Schakelaar met mechanische begrenzing.
DE4006466A1 (de) * 1990-03-01 1991-09-05 Black & Decker Inc Schalter
DE4038785A1 (de) * 1990-12-05 1992-06-11 Bsg Schalttechnik Vorrichtung zur steuerung oder regelung von durch akkus versorgter geraete
DE4038786A1 (de) * 1990-12-05 1992-06-11 Bsg Schalttechnik Vorrichtung zur steuerung oder regelung von durch akkus versorgter geraete
DE4038787A1 (de) * 1990-12-05 1992-06-11 Bsg Schalttechnik Vorrichtung zur steuerung oder regelung von durch akkus versorgter geraete
GB9115603D0 (en) * 1991-07-19 1991-09-04 Black & Decker Inc Improvements in electrical arrangements in power tools and switches
DE4415794A1 (de) * 1994-05-05 1995-11-16 Braun Ag Schaltungsanordnung zur Begrenzung des zu schaltenden Stromes eines elektrischen Verbrauchers
DE102007011658B4 (de) * 2007-03-09 2024-05-16 Marquardt Gmbh Elektrischer Schalter

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2942087A (en) * 1957-03-29 1960-06-21 Cutler Hammer Inc Electric switch
US3260827A (en) * 1965-07-12 1966-07-12 Skil Corp Motor reversing mechanism for electrically powered portable tools
US3327196A (en) * 1965-04-01 1967-06-20 Carling Electric Inc Variable speed control for power hand tools and the like
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
US3447057A (en) * 1966-07-14 1969-05-27 Cutler Hammer Inc Solid state power controller for a.c. load devices
US3484632A (en) * 1967-01-12 1969-12-16 Arrow Hart & Hegeman Electric Variable speed controller for portable electric devices

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2942087A (en) * 1957-03-29 1960-06-21 Cutler Hammer Inc Electric switch
US3327196A (en) * 1965-04-01 1967-06-20 Carling Electric Inc Variable speed control for power hand tools and the like
US3260827A (en) * 1965-07-12 1966-07-12 Skil Corp Motor reversing mechanism for electrically powered portable tools
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
US3447057A (en) * 1966-07-14 1969-05-27 Cutler Hammer Inc Solid state power controller for a.c. load devices
US3484632A (en) * 1967-01-12 1969-12-16 Arrow Hart & Hegeman Electric Variable speed controller for portable electric devices

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3731027A (en) * 1970-03-18 1973-05-01 Kopp H Electrical press key device with thermic excess current release
US3761788A (en) * 1971-08-10 1973-09-25 Lucerne Products Inc Electronic switch module with ceramic case
US4734547A (en) * 1985-08-05 1988-03-29 Fujisoku Electric Co., Ltd. Reversing speed control switch
US5455886A (en) * 1994-05-26 1995-10-03 Ryobi Motor Products Corporation Electrical implement with variable speed control
US9406457B2 (en) * 2011-05-19 2016-08-02 Black & Decker Inc. Electronic switching module for a power tool
US8446120B2 (en) 2011-05-19 2013-05-21 Black & Decker Inc. Electronic switching module for a power tool
US9000882B2 (en) 2011-05-19 2015-04-07 Black & Decker Inc. Electronic switching module for a power tool
US9401250B2 (en) 2011-05-19 2016-07-26 Black & Decker, Inc. Electronic switching module for a power tool
US20120292067A1 (en) * 2011-05-19 2012-11-22 Black & Decker Inc. Electronic switching module for a power tool
US10651706B2 (en) 2011-05-19 2020-05-12 Black & Decker Inc. Control unit for a power tool
US20160315567A1 (en) * 2011-05-19 2016-10-27 Black & Decker Inc. Electronic switching module for a power tool
US9508498B2 (en) 2011-05-19 2016-11-29 Black & Decker, Inc. Electronic switching module for a power tool
US10256697B2 (en) * 2011-05-19 2019-04-09 Black & Decker Inc. Electronic switching module for a power tool
US8493172B2 (en) 2011-09-30 2013-07-23 Snap-On Incorporated Variable speed toggle trigger
US10043619B2 (en) 2014-03-28 2018-08-07 Black & Decker Inc. Biasing member for a power tool forward/reverse actuator
US9847194B2 (en) 2014-03-28 2017-12-19 Black & Decker Inc. Integrated electronic switch and control module for a power tool
US10497524B2 (en) 2014-03-28 2019-12-03 Black & Decker Inc. Integrated electronic switch and control module for a power tool
US10637379B2 (en) * 2015-04-07 2020-04-28 Black & Decker Inc. Power tool with automatic feathering mode
US20160301340A1 (en) * 2015-04-07 2016-10-13 Black & Decker Inc. Power tool with automatic feathering mode
US11398786B2 (en) * 2015-04-07 2022-07-26 Black & Decker Inc. Power tool with automatic feathering mode
WO2017097910A1 (de) * 2015-12-11 2017-06-15 Marquardt Verwaltungs-Gmbh Elektrischer schalter
US10541588B2 (en) 2017-05-24 2020-01-21 Black & Decker Inc. Electronic power module for a power tool having an integrated heat sink
US10608501B2 (en) 2017-05-24 2020-03-31 Black & Decker Inc. Variable-speed input unit having segmented pads for a power tool

Also Published As

Publication number Publication date
NL7013709A (enrdf_load_stackoverflow) 1971-03-23
FR2062268A5 (enrdf_load_stackoverflow) 1971-06-25
DE2046232A1 (de) 1971-04-01
GB1290770A (enrdf_load_stackoverflow) 1972-09-27
CA922775A (en) 1973-03-13

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