US3571544A - Magnetic key operated switch for electrically operated hand tools - Google Patents

Magnetic key operated switch for electrically operated hand tools Download PDF

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Publication number
US3571544A
US3571544A US3571544DA US3571544A US 3571544 A US3571544 A US 3571544A US 3571544D A US3571544D A US 3571544DA US 3571544 A US3571544 A US 3571544A
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United States
Prior art keywords
key
mounted
arm
switch
opening
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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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Hilary William Sheehan
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Hilary William Sheehan
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
    • H01H36/0006Permanent magnet actuating reed switches
    • H01H36/0066Permanent magnet actuating reed switches magnet being removable, e.g. part of key pencil
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
    • 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
    • H01H9/00Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02Bases, casings, or covers
    • H01H9/0214Hand-held casings
    • H01H2009/0221Hand-held casings the switches being fixed to the operator's hand, e.g. integrated in a glove or fixed to a ring
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00Locks
    • Y10T70/70Operating mechanism
    • Y10T70/7441Key
    • Y10T70/778Operating elements
    • Y10T70/7791Keys
    • Y10T70/7904Magnetic features

Abstract

This invention relates to a switch for electrically operated hand tools, and the like, wherein the contact points of the switch are normally maintained yieldably separated, and one arm of said points is movable, and a ring is provided for the user of the device having a magnetized key, shaped to fit the particular key opening of the tool, so that when the key, mounted on a ring worn on a finger of the user, is inserted into the key opening, the movable arm will be moved into closed position, completing an electrical circuit through the motor of the tool, and upon removal of the key, for any reason, the tool will be immediately deactivated.

Description

United States Patent Inventor Hilary William Sheehan 1408 Leneva Lane, Pasadena, Tex. 77502 769,189

Oct. 21, 1968 Mar. 23, 1971 Appl. No. Filed Patented MAGNETIC KEY OPERATED SWITCH FOR ELECTRICALLY OPERATED HAND TOOLS 2 Claims, 5 Drawing Figs.

References Cited UNITED STATES PATENTS 3/1916 Meriwether 2,625,630 1/1953 Eckles 200/164 2,735,908 2/1956 Peretti et al. 200/157 2,767,278 10/1956 Collins 335/302X FOREIGN PATENTS 1,140,952 12/1 962 Germany ZOO/61.58

1,138,123 12/1968 Great Britain 335/205 Primary Examiner-Robert K. Schaefer Assistant Examiner-Robert A. Vanderhye Attorney-Ranseler O. Wyatt ABSTRACT: This invention relates to a switch for electrically operated hand tools, and the like, wherein the contact points of the switch are normally maintained yieldably separated,

and one arm of said points is movable, and a ring is provided,

for the user of the device having a magnetized key, shaped to fit the particular key opening of the tool, so that when the key, mounted on a ring worn on a finger of the user, is inserted into the key opening, the movable arm will be moved into closed position, completing an electrical circuit through the motor of the tool, and upon removal of the key, for any reason, the tool will be immediately deactivated.

Q 1' /////////l]/I H 1 a 7 4 am f m 21 A W w r- .;--2

/ w I I I 1a 0 1111] 6 .1 I 11111 1111. j I I l MAGNETIC KEY OPERATED SWITCH FOR ELECTRICALLY OPERATED HAND TOOLS SUMMARY OF THE INVENTION A switch for electrically operated hand tools comprising a fixed and a movable contact arm, contact points mounted on the extended ends of said arms, a key, opening in the housing of the hand tool and a magnetized key, having the same contour as the key opening, mounted on a finger ring and adapted to be inserted into said key opening to move said movable arm and to move said contact points into contact with each other and to maintain said contact until said key is removed from said key opening.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of the key mounted on a ring and showing a finger to receive said ring in dotted lines.

FIG. 2 is a side elevational view of the ring key.

FIG. 3 is a side elevational view, insection, showing the switch mounted in a housing and showing the key in the key opening in dotted lines.

FIG. 4 is an elevational perspective view of a hand tool having the key opening to receive the magnetized key.

FIG. 5 is an electrical diagramillustrating the circuit employed.

DESCRIPTION OF THE PREFERRED EMBODIMENT In the drawings, the numeral l designates a tool housing such as the handle of an electric drill in which a key opening 2 is formed of a particular, selected contour. A block of mag netized metal, contoured to exactly fit the contour of the opening 2, forms the key 3, which is mounted on a finger ring.

In the housing 1 is mounted the electric circuit control plange 4 and the spring loaded movable contact arm 5. A control arm 6 is mounted on the extended end of the contact arm 5, and is formed of a metal responsive to the magnetic force of the magnetized key 3, the extended end of the control arm 6 being positioned opposite the key opening 2. A fixed contact arm 7.is mounted in the housing 1 as the contact terminal 9. Mounted on the arm 5 is the pivotal contact member 8 which is yieldably urged in one direction by the spring 13 to provide a wiping action as the contact members 8, 9 are brought together and separated. An electric cord, as 10, extends through the housing 1 and the wires thereof are connected to the respective contact arms. The circuit is carried through the plate 4 to the motor 14.

The ring 11 on which the key 3 is mounted may be worn on the finger of the user, or expanded to be worn over the glove 12 of the user. When the key 3 is inserted in the opening 2, the control arm 6 will be drawn to the key 3 and the arm 5 pivoted to place the contact point 8 into contact with the point 9, thus completing the circuit through the motor and activating the tool. In the event the user drops the tool, or it becomes disengaged from his hand in any manner, the key 3 will be removed from the opening 2, and the arm 5 will move the point 8 out of contact with the point 9, and the motor of the tool will be deactivated.

lclaim:

I. In a switch for electrically operated hand tools, a switch housing, a spring mounted movable arm and a fixed arm, said arms being mounted in said housing and connected into an electrical circuit from a source of power through an electrically operated motor, contact points on said arms, a control arm on said movable arm formed of magnetic responsive metal, an opening in said housing adjacent said control arm and a magnetized key insertable into said opening to move said movable arm into contact with said fixed arm, the said key being mounted on a finger ring to be worn by the user.

2. The device defined in claim 1 wherein the key is mounted on a finger ring which may be adjusted to be mounted on the gloved finger of the user.

Claims (2)

1. In a switch for electrically operated hand tools, a switch housing, a spring mounted movable arm and a fixed arm, said arms being mounted in said housing and connected into an electrical circuit from a source of power through an electrically operated motor, contact points on said arms, a control arm on said movable arm formed of magnetic responsive metal, an opening in said housing adjacent said control arm and a magnetized key insertable into said opening to move said movable arm into contact with said fixed arm, the said key being mounted on a finger ring to be worn by the user.
2. The device defined in claim 1 wherein the key is mounted on a finger ring which may be adjusted to be mounted on the gloved finger of the user.
US3571544D 1968-10-21 1968-10-21 Magnetic key operated switch for electrically operated hand tools Expired - Lifetime US3571544A (en)

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US76918968A true 1968-10-21 1968-10-21

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US3571544A true US3571544A (en) 1971-03-23

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US3571544D Expired - Lifetime US3571544A (en) 1968-10-21 1968-10-21 Magnetic key operated switch for electrically operated hand tools

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Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3713056A (en) * 1970-11-16 1973-01-23 Surva Seikosha Kk Electromagnetic switch assembly
US3750062A (en) * 1970-08-17 1973-07-31 Suwa Seikosha Kk Thin-type switchboard
US3801767A (en) * 1972-12-11 1974-04-02 R Marks Pull-apart safety switch with magnetic means for machines
US3979052A (en) * 1974-04-25 1976-09-07 United Technologies Corporation High security lock
US4105885A (en) * 1976-06-22 1978-08-08 Consumer Concepts, Inc. Hand operated instruments having non-magnetic safety switch
US4232819A (en) * 1978-07-10 1980-11-11 Sentry Controls, Inc. Control system for environmental apparatus
US4531029A (en) * 1982-01-08 1985-07-23 Currillies Trimble Cricket switch
US20020129454A1 (en) * 2001-03-16 2002-09-19 Braun Gmbh Dental cleaning device
US20030101526A1 (en) * 2001-12-04 2003-06-05 Alexander Hilscher Dental cleaning device
US20040084430A1 (en) * 2002-10-31 2004-05-06 Hanzel Daniel J. Triggerless welding implement and method of operating same
US20050000044A1 (en) * 2001-03-14 2005-01-06 Braun Gmbh Method and device for cleaning teeth
US20050033383A1 (en) * 2003-08-04 2005-02-10 Ibrahim Ibrahim Medical device with magnetically-responsive control switch
US20050247348A1 (en) * 2004-05-10 2005-11-10 Gary Anderson Pneumatic tool lock
US20050248893A1 (en) * 2004-05-10 2005-11-10 Gary Anderson Power tool lockdown device
US20060026841A1 (en) * 2004-08-09 2006-02-09 Dirk Freund Razors
EP1764757A1 (en) * 2005-08-04 2007-03-21 Robert Bosch Gmbh Anti-theft device for electric power tool machines and electric power tool machine with anti-theft device
EP1619569A3 (en) * 2004-07-23 2007-04-04 Lacroix Electronique SRL Thermostat with modifiable operating modes and method for modifying said operating modes
US20090219118A1 (en) * 2004-05-10 2009-09-03 Gary Anderson Power tool lockdown device
US20100064527A1 (en) * 2008-09-16 2010-03-18 Lee Kyung Suk Electromotion trim scissors
US20110122987A1 (en) * 2004-12-23 2011-05-26 Braun Gmbh Replaceable Accessory for a Small Electrical Appliance and Method of Monitoring the Usage of the Accessory
EP2395527A1 (en) * 2010-06-10 2011-12-14 Festool GmbH Manually operated machine tool with an electric switch
US8443476B2 (en) 2001-12-04 2013-05-21 Braun Gmbh Dental cleaning device
US8558430B2 (en) 2010-08-19 2013-10-15 Braun Gmbh Resonant motor unit and electric device with resonant motor unit
US8631532B2 (en) 2011-07-25 2014-01-21 Braun Gmbh Oral hygiene device
US9099939B2 (en) 2011-07-25 2015-08-04 Braun Gmbh Linear electro-polymer motors and devices having the same
US9226808B2 (en) 2011-07-25 2016-01-05 Braun Gmbh Attachment section for an oral hygiene device
US10627178B2 (en) * 2014-12-30 2020-04-21 Pahmet Llc Authentication and unlocking system and method utilizing magnetic actuation

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1174887A (en) * 1915-11-23 1916-03-07 Vincent R Brice Magnetic nail-holding device.
US2625630A (en) * 1949-01-10 1953-01-13 Emerson Electric Mfg Co Switch
US2735908A (en) * 1956-02-21 Power tools
US2767278A (en) * 1951-06-29 1956-10-16 Collins Douglas Magnetic lock switch for starter and ignition circuits
DE1140952B (en) * 1957-10-28 1962-12-13 Olivetti & Co Spa Safety device on electrical write and similar machines
GB1138123A (en) * 1967-04-24 1968-12-27 Brown Ltd S G Improvements in or relating to two-way speech communication electric switching apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2735908A (en) * 1956-02-21 Power tools
US1174887A (en) * 1915-11-23 1916-03-07 Vincent R Brice Magnetic nail-holding device.
US2625630A (en) * 1949-01-10 1953-01-13 Emerson Electric Mfg Co Switch
US2767278A (en) * 1951-06-29 1956-10-16 Collins Douglas Magnetic lock switch for starter and ignition circuits
DE1140952B (en) * 1957-10-28 1962-12-13 Olivetti & Co Spa Safety device on electrical write and similar machines
GB1138123A (en) * 1967-04-24 1968-12-27 Brown Ltd S G Improvements in or relating to two-way speech communication electric switching apparatus

Cited By (60)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3750062A (en) * 1970-08-17 1973-07-31 Suwa Seikosha Kk Thin-type switchboard
US3713056A (en) * 1970-11-16 1973-01-23 Surva Seikosha Kk Electromagnetic switch assembly
US3801767A (en) * 1972-12-11 1974-04-02 R Marks Pull-apart safety switch with magnetic means for machines
US3979052A (en) * 1974-04-25 1976-09-07 United Technologies Corporation High security lock
US4105885A (en) * 1976-06-22 1978-08-08 Consumer Concepts, Inc. Hand operated instruments having non-magnetic safety switch
US4232819A (en) * 1978-07-10 1980-11-11 Sentry Controls, Inc. Control system for environmental apparatus
US4531029A (en) * 1982-01-08 1985-07-23 Currillies Trimble Cricket switch
US20050011025A1 (en) * 2000-03-17 2005-01-20 Braun Gmbh Dental cleaning device
US7624467B2 (en) 2000-03-17 2009-12-01 Braun Gmbh Dental cleaning device
US7979939B2 (en) 2000-03-17 2011-07-19 Braun Gmbh Dental cleaning device
US20070234493A1 (en) * 2001-03-14 2007-10-11 Braun Gmbh, A Germany Corporation Dental Cleaning Device
US7774886B2 (en) 2001-03-14 2010-08-17 Braun Gmbh Method and device for cleaning teeth
US20050000044A1 (en) * 2001-03-14 2005-01-06 Braun Gmbh Method and device for cleaning teeth
US7861349B2 (en) 2001-03-14 2011-01-04 Braun Gmbh Method and device for cleaning teeth
US7770251B2 (en) 2001-03-14 2010-08-10 Braun Gmbh Method and device for cleaning teeth
US20050100867A1 (en) * 2001-03-14 2005-05-12 Alexander Hilscher Method and device for cleaning teeth
US7673360B2 (en) 2001-03-14 2010-03-09 Braun Gmbh Dental cleaning device
US7661172B2 (en) 2001-03-14 2010-02-16 Braun Gmbh Dental cleaning device
US8671493B2 (en) 2001-03-14 2014-03-18 Braun Gmbh Dental cleaning device
US7621015B2 (en) 2001-03-14 2009-11-24 Braun Gmbh Method and device for cleaning teeth
US20080022469A1 (en) * 2001-03-14 2008-01-31 Alexander Hilscher Dental cleaning device
US7024717B2 (en) 2001-03-14 2006-04-11 Braun Gmbh Method and device for cleaning teeth
US20060096046A1 (en) * 2001-03-14 2006-05-11 Alexander Hilscher Method and device for cleaning teeth
US20080022471A1 (en) * 2001-03-14 2008-01-31 Alexander Hilscher Dental cleaning device
US20080010771A1 (en) * 2001-03-14 2008-01-17 The Gillette Company Method and device for cleaning teeth
US7086111B2 (en) 2001-03-16 2006-08-08 Braun Gmbh Electric dental cleaning device
US20020129454A1 (en) * 2001-03-16 2002-09-19 Braun Gmbh Dental cleaning device
US7207080B2 (en) 2001-12-04 2007-04-24 Braun Gmbh Dental cleaning device
US8683637B2 (en) 2001-12-04 2014-04-01 Braun Gmbh Dental cleaning device
US20030101526A1 (en) * 2001-12-04 2003-06-05 Alexander Hilscher Dental cleaning device
US8443476B2 (en) 2001-12-04 2013-05-21 Braun Gmbh Dental cleaning device
US8181301B2 (en) 2001-12-04 2012-05-22 Braun Gmbh Dental cleaning device
US20100281637A1 (en) * 2001-12-04 2010-11-11 Braun Gmbh Dental Cleaning Device
US20040255409A1 (en) * 2001-12-04 2004-12-23 Alexander Hilscher Dental cleaning device
US20040084430A1 (en) * 2002-10-31 2004-05-06 Hanzel Daniel J. Triggerless welding implement and method of operating same
US6936789B2 (en) 2002-10-31 2005-08-30 Illinois Tool Works Inc. Triggerless welding implement and method of operating same
WO2004041471A1 (en) * 2002-10-31 2004-05-21 Illinois Tool Works Inc. Triggerless welding implement and method of operating the same, a magnetic operator and a glove
US7751898B2 (en) * 2003-08-04 2010-07-06 Cochlear Limited Medical device with magnetically-responsive control switch
US20050033383A1 (en) * 2003-08-04 2005-02-10 Ibrahim Ibrahim Medical device with magnetically-responsive control switch
US20090219118A1 (en) * 2004-05-10 2009-09-03 Gary Anderson Power tool lockdown device
US7750509B2 (en) 2004-05-10 2010-07-06 Gary Anderson Power tool lockdown device
US20050247348A1 (en) * 2004-05-10 2005-11-10 Gary Anderson Pneumatic tool lock
US20050248893A1 (en) * 2004-05-10 2005-11-10 Gary Anderson Power tool lockdown device
US7007712B2 (en) 2004-05-10 2006-03-07 Gary Anderson Pneumatic tool lock
US7317263B2 (en) 2004-05-10 2008-01-08 Gary Anderson Power tool lockdown device
EP1619569A3 (en) * 2004-07-23 2007-04-04 Lacroix Electronique SRL Thermostat with modifiable operating modes and method for modifying said operating modes
US20060026841A1 (en) * 2004-08-09 2006-02-09 Dirk Freund Razors
US20110122987A1 (en) * 2004-12-23 2011-05-26 Braun Gmbh Replaceable Accessory for a Small Electrical Appliance and Method of Monitoring the Usage of the Accessory
US8218711B2 (en) 2004-12-23 2012-07-10 Braun Gmbh Replaceable accessory for a small electrical appliance and method of monitoring the usage of the accessory
EP1764757A1 (en) * 2005-08-04 2007-03-21 Robert Bosch Gmbh Anti-theft device for electric power tool machines and electric power tool machine with anti-theft device
US8276280B2 (en) * 2008-09-16 2012-10-02 Republic Of Korea (Management: Rural Development Administration) Electromotion trim scissors
US20100064527A1 (en) * 2008-09-16 2010-03-18 Lee Kyung Suk Electromotion trim scissors
EP2395527A1 (en) * 2010-06-10 2011-12-14 Festool GmbH Manually operated machine tool with an electric switch
US8558430B2 (en) 2010-08-19 2013-10-15 Braun Gmbh Resonant motor unit and electric device with resonant motor unit
US9099939B2 (en) 2011-07-25 2015-08-04 Braun Gmbh Linear electro-polymer motors and devices having the same
US9226808B2 (en) 2011-07-25 2016-01-05 Braun Gmbh Attachment section for an oral hygiene device
US9387059B2 (en) 2011-07-25 2016-07-12 Braun Gmbh Oral cleaning tool for an oral hygiene device
US10327876B2 (en) 2011-07-25 2019-06-25 Braun Gmbh Oral cleaning tool for an oral hygiene device
US8631532B2 (en) 2011-07-25 2014-01-21 Braun Gmbh Oral hygiene device
US10627178B2 (en) * 2014-12-30 2020-04-21 Pahmet Llc Authentication and unlocking system and method utilizing magnetic actuation

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