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Motor driven tool switch

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Publication number
US1929662A
US1929662A US53223231A US1929662A US 1929662 A US1929662 A US 1929662A US 53223231 A US53223231 A US 53223231A US 1929662 A US1929662 A US 1929662A
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Grant
Patent type
Prior art keywords
handle
motor
switch
position
frame
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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
Application number
Inventor
Fred W Wappat
Original Assignee
Wappat Inc
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Publication date
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02Bases, casings, or covers
    • H01H9/06Casing 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
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00Mechanisms for operating contacts
    • H01H3/02Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/20Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch wherein an auxiliary movement thereof, or of an attachment thereto, is necessary before the main movement is possible or effective, e.g. for unlatching, for coupling

Description

Oct. 10, 1933. F. w w Pp 'r MOTOR DRIVEN TOOL SWITCH Original Filed April 16, 1950 2 Sheets-Sheet 1 I I l I l IL Oct. 10, 1933. -w WA PAT 1,929,662

MOTOR DRIVEN TOOL SWITCH Original Filed April 16, 1930 2 Sheets-Sheet 2 Patented oron DRIVEN 'rooL swrrcn '1 J 1 Fred WfWappat, Pittsburgh, Pa; assignonto Wappat, Incorporated, a corporation of Penn- 'sylvania fol-inner application August 16, 1930, Serial No r 475,687, now .Patent' No. 1,830,579....Divided a and this applicationApril 23,1931. Serial No.

The invention relates to motor driven tool switches and constitutes a division of my application, Serial No. 475,687, filed August 16, 1930, "n'owPatentNumber 1,830,580. The invention is :3 i particularly useful, connection with electric handsaws, such as that shown in r'nyPatent No. 1,623,290, butis not confined to use with electric has-'for'its principal objects; (1) the provision of 1 improved safety means in connection with the hand lever carried in the handle of the tool for operating'the electric switch whereby accidental starting of the motor is avoided; and, (2) the 1 provision of means whereby said lever may be locked in operative position under certain conditions of use in order to relieve the operator of the necessity of holding the lever in such position. 'One' embodiment of the inventionis illustrated in Figure 1 is a perspective view of a motor drivig'o'. the accompanying drawings, wherein:-

en' saw with the switch construction applied thereto. Fig. 2 is a front view of the machine.

Fig. 3 is a detail sectional view through the i handle ofthe tool Showing the safety device in locking position preventing the "accidental operation of the to that'of Fig. 3, but showing the parts in operating position. AndFig. 5 is another section 1 showing the parts locked in operating position.

Referring provided at an electric motor suitably mounted in the frame and provided with a shaft 4 carrying the worm 5 1, and 5, wherein 13 is a snap switch having a.

and carryin saw 8; 9 is switch lever. Fig. 4 is a view similar to the drawings, 1 is the saw frame one end with a handle 2; 3 (Fig. 2) is i 5; 6 is a shaft extending transversely of the frame g'the worm wheel 7 and the circular a guard or shield integral with the frame and surrounding the upper half of the saw;

10 is a movable guard casing or shield, similar to ithat of my guard being patent heretofore referred to, said pivoted on the frame concentric with the axis of rotation of the saw or approximately so and being adapted to telescope into the fixed casing when swung to the rear and 11 is the base iplate of'the machine on which the frame 1 is mounted fo r tilting and depth adjustments as is well known in the art.

The device for operating the, switch which starts and stops the motor is shown in Figs. 3, 4,

trigger 14 operated by the slide'rodl5, and 16 an operative member, preferably a lever,.pi,v-

oted at 17 in the handle 2.- The switch is so confull line pos structed that the trigger is yieldingly held in the ition of Fig. 3, at which time the cirg '5 Claims. (cram- 1) v Fig. 4. In order toprevent the motor frombeing Ihandsaw'a'being' designed for use'with electrically operated hand toolsof all kinds. The invention I started accidentally when the operator grasps the handle to move the machine,-the detent 18 pivoted at 19 and normally pressed to the position shown in Fig. 3 by the spring 20 is provided. The end of this detent engages a shoulder 21 on the lever, thus preventing it from being accidentally swung to the right around its pivot 1'7. The detent has a thumb piece 22 projecting through an opening in the handle. In order to release the lever from the detent when it is desired to start the motor; the operator first presses the end 22 inward, thus disengaging the inner end of the detent from the shoulder 21. The lever may 15 then be swung to its fon position, as shown in Fig. 4. I

In some cases, it may be desirable tolock the lever 16 in on" position, as for instance, when the saw is turned upside down and clamped in such position in order touse its base plate 11 as a saw table over which the members to be cut are moved, and in order to so lock the lever it is provided with a shoulder 23 adapted to be engaged and held by the recess 24 in the detent 5 when the parts are moved to the position of Fig. 5. This engagement is secured by pushing the thumb piece 22 down fromthe position of Fig. 4

to that of Fig.5 and allowing the lever to swing. slightly to the left from the position of Fig. 4 to the position of Fig.5 so that the shoulder engages the recess. To release the parts and allow them sitioned on thehandle sothat the grip of the operator on the handle in supporting the tool will 05.

- move the switch to complete the circuit through the motor, and a releasable detent on the handle locking the member against said movement.

2. Meansfor controlling the operation of an electric hand tool having a frame, a tool mounted 1 for operation therein, an electric motor on the frame for driving the tool, a handle on the frame, and a switch for controlling the flow of current from a source of supply to said motor, comprising a movable member for operating the switch positioned on the handle so that the grip of the operator on the handle in supporting the load will move the switch to complete the circuit through the motor, and a releasable detent on the handle locking the member against said movement, said detent being positioned so that it may be engaged by the thumb of the operator to move it to release position while his fingers grip said handle and said member.

3. Means for controlling thewoperation of an electric hand tool having a frame, a tool mounted for operation therein, an electric motor on the frame for driving the tool, a handle on the frame, and a switch for controlling the flow of current from a source of supply to said motor, comprising a movable member for operating the switch positioned on the handle so that the grip of the operator on the handle in supporting the load will move the switch to complete the circuit through the motor, a releasable detent on the handle for locking the member "against said movement, and

releasable means for locking the member in the positionto which it is moved to complete said circuit. 7

4. Means for controlling the operation of an the handle for locking the member against said movement, and means on the detent for also locking the member in the position to which it is moved to complete said circuit.

5. Means for controlling the operation of an electric handtool having a frame, a tool mounted for operation therein, a motor on the frame for driving the tool," a handle on the frame, and a switch controlling the flow of current from a source of supply to said motor, comprising a movable member for operating the switch positioned on the handle so that the grip of the operator on the handle will move the switch to complete the circuit through the motor, a releasable detent on the handle for locking the member against said movement, and means on the detent for also locking the member in the position to which it is moved to complete said circuit, said last means being arranged to release the member when such member is given a. further movement.

- FRED W. WAPPAT.

US1929662A 1930-08-16 1931-04-23 Motor driven tool switch Expired - Lifetime US1929662A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US1830580A US1830580A (en) 1930-08-16 1930-08-16 Electric handsaw
US1929662A US1929662A (en) 1930-08-16 1931-04-23 Motor driven tool switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1929662A US1929662A (en) 1930-08-16 1931-04-23 Motor driven tool switch

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US1929662A true US1929662A (en) 1933-10-10

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Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2891135A (en) * 1957-09-25 1959-06-16 Slavin Edwin Lock for an instant release switch
DE1086782B (en) * 1954-12-15 1960-08-11 Thor Power Tool Co For an electric tool of certain switch drive mechanism
US2976436A (en) * 1957-07-12 1961-03-21 Anton Nicholas Multi-speed drill
US3217559A (en) * 1963-01-21 1965-11-16 Black & Decker Mfg Co Trigger locking means for portable electric device
US3780246A (en) * 1972-08-22 1973-12-18 Black & Decker Mfg Co Hand-operated tool with switch actuator having three-position lock-off assembly
FR2212203A1 (en) * 1973-01-03 1974-07-26 Black & Decker Mfg Co
DE2315841A1 (en) * 1973-03-30 1974-10-10 Bosch Gmbh Robert Hand tool
US3847233A (en) * 1973-06-29 1974-11-12 Black & Decker Mfg Co Trigger mechanism for hand-operated power device providing automatic lock-off and manual lock-on operation
US3854020A (en) * 1973-06-29 1974-12-10 Black & Decker Mfg Co Trigger mechanism for hand-operated power device including stationary locking device which provides lock-off and lock-on operation
US3873796A (en) * 1973-07-06 1975-03-25 Black & Decker Mfg Co Trigger mechanism for hand-operated power device including independently operable locking devices providing automatic lock off and manual lock-on operation
US3953696A (en) * 1973-07-14 1976-04-27 J. & J. Marquardt Actuator construction having releasable lock in actuated and deactuated positions
FR2290016A1 (en) * 1974-11-01 1976-05-28 Lucerne Products Inc Lock the trigger of the control switch of a machine tool
DE3007304A1 (en) * 1980-02-27 1981-09-03 Marquardt Gmbh Switch for electric hand tool - has actuating member rotatably mounted on intermediate member and movable against return spring force and actuating switching mechanism
DE3104733A1 (en) * 1981-02-11 1982-08-19 Reich Maschf Gmbh Karl Switch for electric tools
US4376240A (en) * 1980-02-19 1983-03-08 Desoutter Limited Power tool
US4922069A (en) * 1988-09-07 1990-05-01 Aircap Industries Corporation Electrical control switch mechanism
US5595532A (en) * 1995-10-20 1997-01-21 Waxing Corporation Of America, Inc. Electrically-powered polisher
US5642008A (en) * 1995-10-20 1997-06-24 Waxing Corporation Of America, Inc. Power tool motor assembly
US5678272A (en) * 1995-10-20 1997-10-21 Waxing Corporation Of America, Inc. Power tool having a quick release system for attaching a working element
US6057518A (en) * 1998-08-14 2000-05-02 Black & Decker, Inc. Lockout mechanism for power tool
US6288350B1 (en) 1998-08-14 2001-09-11 Black & Decker, Inc. Lockout mechanism for power tool
US6290587B1 (en) 1995-10-20 2001-09-18 Wilton Tool Company, Llc Electrically-powered polisher
US6412662B1 (en) * 2001-09-07 2002-07-02 Illinois Tool Works Inc. Hot melt adhesive hand applicator
US6610946B2 (en) 2001-04-20 2003-08-26 Black & Decker Inc. Actuation mechanism for a power tool
US20080090504A1 (en) * 2006-10-13 2008-04-17 Black & Decker Inc. Large angle grinder
US20090119933A1 (en) * 2007-11-08 2009-05-14 Echo, Inc. Apparatus having a tool on an elongate pole and method of operating the apparatus
US20110168422A1 (en) * 2010-01-13 2011-07-14 Hitachi Koki Co., Ltd. Electric power tool
EP2361732A3 (en) * 2010-02-19 2014-08-27 Hitachi Koki CO., LTD. Power tool having off-lock member
US20140338947A1 (en) * 2011-12-23 2014-11-20 Robert Bosch Gmbh Machine tool

Cited By (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1086782B (en) * 1954-12-15 1960-08-11 Thor Power Tool Co For an electric tool of certain switch drive mechanism
US2976436A (en) * 1957-07-12 1961-03-21 Anton Nicholas Multi-speed drill
US2891135A (en) * 1957-09-25 1959-06-16 Slavin Edwin Lock for an instant release switch
US3217559A (en) * 1963-01-21 1965-11-16 Black & Decker Mfg Co Trigger locking means for portable electric device
US3780246A (en) * 1972-08-22 1973-12-18 Black & Decker Mfg Co Hand-operated tool with switch actuator having three-position lock-off assembly
FR2196880A1 (en) * 1972-08-22 1974-03-22 Black & Decker Mfg Co
FR2212203A1 (en) * 1973-01-03 1974-07-26 Black & Decker Mfg Co
DE2315841A1 (en) * 1973-03-30 1974-10-10 Bosch Gmbh Robert Hand tool
US3854020A (en) * 1973-06-29 1974-12-10 Black & Decker Mfg Co Trigger mechanism for hand-operated power device including stationary locking device which provides lock-off and lock-on operation
US3847233A (en) * 1973-06-29 1974-11-12 Black & Decker Mfg Co Trigger mechanism for hand-operated power device providing automatic lock-off and manual lock-on operation
US3873796A (en) * 1973-07-06 1975-03-25 Black & Decker Mfg Co Trigger mechanism for hand-operated power device including independently operable locking devices providing automatic lock off and manual lock-on operation
US3953696A (en) * 1973-07-14 1976-04-27 J. & J. Marquardt Actuator construction having releasable lock in actuated and deactuated positions
FR2290016A1 (en) * 1974-11-01 1976-05-28 Lucerne Products Inc Lock the trigger of the control switch of a machine tool
US4376240A (en) * 1980-02-19 1983-03-08 Desoutter Limited Power tool
DE3007304A1 (en) * 1980-02-27 1981-09-03 Marquardt Gmbh Switch for electric hand tool - has actuating member rotatably mounted on intermediate member and movable against return spring force and actuating switching mechanism
DE3104733A1 (en) * 1981-02-11 1982-08-19 Reich Maschf Gmbh Karl Switch for electric tools
US4922069A (en) * 1988-09-07 1990-05-01 Aircap Industries Corporation Electrical control switch mechanism
US6290587B1 (en) 1995-10-20 2001-09-18 Wilton Tool Company, Llc Electrically-powered polisher
US5642008A (en) * 1995-10-20 1997-06-24 Waxing Corporation Of America, Inc. Power tool motor assembly
US5678272A (en) * 1995-10-20 1997-10-21 Waxing Corporation Of America, Inc. Power tool having a quick release system for attaching a working element
US5794300A (en) * 1995-10-20 1998-08-18 Waxing Corporation Of America, Inc. Power tool
US5830047A (en) * 1995-10-20 1998-11-03 Waxing Corporation Of America, Inc. Electrically-powered polisher
US6592441B2 (en) 1995-10-20 2003-07-15 Whm Tool Group, Inc. Electrically-powered polisher
US5595532A (en) * 1995-10-20 1997-01-21 Waxing Corporation Of America, Inc. Electrically-powered polisher
US6168507B1 (en) 1995-10-20 2001-01-02 Waxing Corporation Of America, Inc. Electrically-powered polisher
US6861598B2 (en) 1998-08-14 2005-03-01 Black & Decker Inc. Lockout mechanism for power tool
US6288350B1 (en) 1998-08-14 2001-09-11 Black & Decker, Inc. Lockout mechanism for power tool
US6340802B1 (en) 1998-08-14 2002-01-22 Black & Decker, Inc. Lockout mechanism for power tool
EP1670011A1 (en) * 1998-08-14 2006-06-14 BLACK & DECKER INC. Lockout mechanism for power tool
US6512188B2 (en) 1998-08-14 2003-01-28 Black & Decker, Inc. Lockout mechanism for power tool
US6538218B2 (en) 1998-08-14 2003-03-25 Black & Decker, Inc. Lockout mechanism for power tool
US6057518A (en) * 1998-08-14 2000-05-02 Black & Decker, Inc. Lockout mechanism for power tool
EP1617444A1 (en) * 1998-08-14 2006-01-18 BLACK & DECKER INC. Lockout mechanism for power tool
EP0982745A3 (en) * 1998-08-14 2000-08-16 Black & Decker Inc. Lock out mechanism for power tool
US6610946B2 (en) 2001-04-20 2003-08-26 Black & Decker Inc. Actuation mechanism for a power tool
US6412662B1 (en) * 2001-09-07 2002-07-02 Illinois Tool Works Inc. Hot melt adhesive hand applicator
US7988538B2 (en) 2006-10-13 2011-08-02 Black & Decker Inc. Large angle grinder
US20080090504A1 (en) * 2006-10-13 2008-04-17 Black & Decker Inc. Large angle grinder
US8388417B2 (en) 2006-10-13 2013-03-05 Black & Decker Inc. Large angle grinder
US20090119933A1 (en) * 2007-11-08 2009-05-14 Echo, Inc. Apparatus having a tool on an elongate pole and method of operating the apparatus
US9492941B2 (en) * 2007-11-08 2016-11-15 Echo, Incorporated Apparatus having a tool on an elongate pole
US20110168422A1 (en) * 2010-01-13 2011-07-14 Hitachi Koki Co., Ltd. Electric power tool
US8752646B2 (en) * 2010-01-13 2014-06-17 Hitachi Koki Co., Ltd. Operating motor switch for electric power tool
EP2345510A3 (en) * 2010-01-13 2014-08-27 Hitachi Koki CO., LTD. Electric power tool
EP2361732A3 (en) * 2010-02-19 2014-08-27 Hitachi Koki CO., LTD. Power tool having off-lock member
US8827004B2 (en) 2010-02-19 2014-09-09 Hitachi Koki Co., Ltd. Power tool having off-lock member
US20140338947A1 (en) * 2011-12-23 2014-11-20 Robert Bosch Gmbh Machine tool

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