US2264746A - Electromagnetic switch - Google Patents

Electromagnetic switch Download PDF

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Publication number
US2264746A
US2264746A US342629A US34262940A US2264746A US 2264746 A US2264746 A US 2264746A US 342629 A US342629 A US 342629A US 34262940 A US34262940 A US 34262940A US 2264746 A US2264746 A US 2264746A
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United States
Prior art keywords
magnetic
contact
member
non
magnetic member
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Expired - Lifetime
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US342629A
Inventor
Walter B Ellwood
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Nokia Bell Labs
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Nokia Bell Labs
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Priority to US342629A priority Critical patent/US2264746A/en
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Publication of US2264746A publication Critical patent/US2264746A/en
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Application status is Expired - Lifetime legal-status Critical

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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00Electromagnetic relays
    • H01H51/28Relays having both armature and contacts within a sealed casing outside which the operating coil is located, e.g. contact carried by a magnetic leaf spring or reed
    • H01H51/287Details of the shape of the contact springs

Description

Dec. 2, 1941. w.'B. ELLWOOD V 2,264,743v ELECTROMAGNETIC SWITCH Filed Junev 27, 1940 FIG.

I INVENTOR v mafluvooo 1 I 'U I,

4 TTORNE V Patented Dec. 2, 1941 ELECTROMAGNETIC SWITCH Walter B. Ellwood, New York, N. Y., assignor to Bell Telephone Laboratories,

Incorporated,

New York, N. Y., a corporation of New York Application June 2'1, 1940, Serial No. 342,629

2 Claims.

This invention relates to switches and particularly to electromagneticaliy operated switches.

The object of the invention is to provide a relay unit contact device which is economical, reliable and easily replaceable.

A feature of the invention is a contact arrangement for transfer operation consisting essentially of contacts of magnetic material sealed in a vessel either. evacuated or filled with an inert gas which may be operated by an external magnetic force whereby costly contact metals are eliminated. To secure transfer operations two magnetic elements are placed lengthwise in the vessel and are slightly overlapping but normally out of contact with each other. To one of these elements is secured by insulation a third and nonmagnetic member which is normally in contact with the other said magnetic element. When an external magnetic force is applied to this unit the two magnetic members which form part of the magnetic circuit as well as part of the electrical circuit of the device are moved together whereby the contact from the second magnetic element is transferred from the non-magnetic element to the first magnetic element since the external magnetic force acts to diminish the air-gap between the two said magnetic elements. The construction of this device involves the use of an insulating member to maintain constant separation between the said non-magnetic element and its associated magnetic element, whereby the second magnetic element thus effectively travels between the two.

Another feature of the invention is the use of a movable contact assembly. In this type relay where the part corresponding to the armature'in a normal relay and the part corresponding to the front contact in a normal relay are both part of the magnetic circuit and both are subject to movement when energized, the part corresponding to the back contact of a normal relay must be made comparatively flexible and caused to move with the front contact since the direction of movement of such front contact is toward the back contact. r

This contact device is of the general nature shown in Patent 2,187,115 to Ellwood et al., January 16, 1940. v

The drawing consists of a single sheet showing three cross-section views of the contact unit.

Fig. 1 shows a cross-section of the unit when taken lengthwise. l is a glass envelope which may be evacuated or filled with an inert gas to prevent corrosion or oxidation. 2 is a terminal entering the envelope to which is attached a resilient magnetic member 3. At the other end of this device a non-magnetic member 4 and a conducting member 5 are sealed into the glass. A magnetic member 6 is attached to the conducting member 5 in any well-known manner, for instance, by welding. The non-magnetic member 4 and the magnetic member 6 are held to a permanent degree of separation by an insulating piece 1. The non-magnetic member 4, the magnetic member 6 and the insulating piece I may be slightly movable as a unit.

As shown in Fig. 1 the contact device is nonoperated and a connection is made between the non-magnetic member 4 and the magnetic member 3. In Fig. 2 the device is shown in its operated position with contact being made between the magnetic member 6 and the magnetic member 3. This illustrates. how the insulating piece I prevents the non-magnetic member 4 which is tensioned'downwardly from following the nonmagnetic member 3 when it moves into contact with the magnetic member 5. Fig. 3 shows a cross-section on the lines 3 3 to illustrate one method by which the insulating piece I may be attached to the non-magnetic member 4 and the magnetic member 6.

This contact device may be operated by a coil external to the envelope I whereby the magnetic members 3 and 6 become part of the magnetic circuit as well as part of the electrical circuit of the device.

What is claimed is:

v 1. A magnetically operated switch structure comprising a pair of magnetic reeds mounted longitudinally in an evacuated or inert gas-filled tube with their inner ends overlapping but normally out of contact with each other, a third non-magnetic element mounted longitudinally and permanently spaced from its companion magnetic reed by insulation whereby said nonmagnetic member and its companion magnetic reed will flex as a unit, said non-magnetic member being normally in contact with the other of said magnetic reeds, and means for producing a magnetomotive force along the axis of said tube for causing the normal air gap between said magnetic reeds to shorten to cause a transfer of contacts between said elements.

2. A magnetically operated switch structure comprising an evacuated or inert gas-filled tube, a magnetic reed sealed into one end of said tube and extending parallel to the axis of said tube, another magnetic reed sealed into the other end of said tube and extending parallel to the axis of said tube, the other ends of said magnetic toward each other the contact between said set! 0nd reed and said non-maanetic member will be broken and a contact between said magnetic reeds will be established. and means for energizin: said contact device by a field extending along the axis of said tube.

WALTER B. ELI-WOOD.

US342629A 1940-06-27 1940-06-27 Electromagnetic switch Expired - Lifetime US2264746A (en)

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Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2491907A (en) * 1946-06-11 1949-12-20 Stevens Arnold Inc Polarized magnetic switch structure
US2506414A (en) * 1947-12-05 1950-05-02 Bell Telephone Labor Inc Sealed wire contact device
US2535400A (en) * 1949-08-25 1950-12-26 Bell Telephone Labor Inc Multicontact dry reed relay
US2570315A (en) * 1948-07-07 1951-10-09 Ford Motor Co Magnetic operated switch
US2648167A (en) * 1948-12-18 1953-08-11 Bell Telephone Labor Inc Machine for manufacturing switches
US2696543A (en) * 1948-12-18 1954-12-07 Bell Telephone Labor Inc Electric switch
US2732451A (en) * 1946-07-05 1956-01-24 Degler
US2760027A (en) * 1953-05-12 1956-08-21 Iron Fireman Mfg Co High speed relay
US2764647A (en) * 1952-01-11 1956-09-25 Cook Electric Co Magnetostrictive relay
US2840660A (en) * 1955-06-16 1958-06-24 G M Giannini & Co Inc Double-throw magnetically operated sealed switch
US2840661A (en) * 1955-06-16 1958-06-24 G M Giannini & Co Inc Magnetic switch device
DE1033762B (en) * 1955-12-28 1958-07-10 Siemens Ag controlled by a magnetic field protection tube changeover contact
US2845506A (en) * 1954-06-28 1958-07-29 Pioneer Electronic Corp High voltage high vacuum relay
DE1064428B (en) * 1957-10-23 1959-08-27 Siemens Ag Arrangement for controlling devices on the route by the moving Behaelter
US2922856A (en) * 1956-12-20 1960-01-26 Siemens Ag Electromagnetic switch
DE1108593B (en) * 1959-02-09 1961-06-08 Werner Voss Means for arming an electric intrusion and anti-theft device, especially for motor vehicles
US2997546A (en) * 1958-11-04 1961-08-22 Bell Telephone Labor Inc Switching device
US3030451A (en) * 1958-11-04 1962-04-17 Bell Telephone Labor Inc Switching device
US3250875A (en) * 1964-01-21 1966-05-10 Wintriss George Reed switch
US3315193A (en) * 1964-11-12 1967-04-18 Briggs & Stratton Corp Reed switch adapted for rapid cycling
DE1514750B1 (en) * 1965-03-16 1970-07-16 Standard Elektrik Lorenz Ag Single or multiple contact in closed Gehaeuse
US3943474A (en) * 1973-10-09 1976-03-09 Shlesinger Jr Bernard E Reed and reed switch therefor
US4038620A (en) * 1973-10-09 1977-07-26 Shlesinger Jr B Edward Magnetic reed switch
US20060125603A1 (en) * 2004-12-09 2006-06-15 Telematics Wireless Ltd. Toll transponder with deactivation means
US20060150361A1 (en) * 2003-02-14 2006-07-13 Dyson Technology Limited Autonomous machine
US20060252469A1 (en) * 2005-05-09 2006-11-09 Roger Lu Shut down mechanism for handheld device
US20080074214A1 (en) * 2006-09-22 2008-03-27 Julian Poyner Safety switch
US20090091287A1 (en) * 2006-05-13 2009-04-09 Linak A/S Linear Actuator
EP2061037A2 (en) * 2007-11-15 2009-05-20 GE-Hitachi Nuclear Energy Americas LLC Method and apparatus for permissive control of a mast and grapple
US20110218810A1 (en) * 2010-03-02 2011-09-08 Momilani Ramstrum System for Controlling Digital Effects in Live Performances with Vocal Improvisation
US8111119B2 (en) 2003-02-19 2012-02-07 Gilmore Glendell N Reed switch apparatus and method of using same
US8734262B1 (en) 2008-09-23 2014-05-27 David A. Yovanovich Billiard ball rack positioning system and use thereof
CN105464745A (en) * 2015-12-18 2016-04-06 重庆五福科技有限公司 Engine and engine oil alarm
US20160311698A1 (en) * 2015-04-24 2016-10-27 Maxtec Plastics, Inc. Ultraviolet-ray lamp water sterilization device and method for controlling the same
EP3116080A1 (en) 2015-07-08 2017-01-11 Vestel Elektronik Sanayi ve Ticaret A.S. A high efficiency limiter circuit
WO2017040397A1 (en) 2015-09-04 2017-03-09 3M Innovative Properties Company Personal protective equipment and methods of monitoring time of usage of personal protective equipment
RU2629002C2 (en) * 2015-12-28 2017-08-24 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Рязанский государственный радиотехнический университет" Sensitivity increasing method of magnetic-controlled switches
US10212782B2 (en) 2015-04-30 2019-02-19 William F. Harris, Jr. Device and method for mode control of wildlife-friendly lighting

Cited By (48)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2491907A (en) * 1946-06-11 1949-12-20 Stevens Arnold Inc Polarized magnetic switch structure
US2732451A (en) * 1946-07-05 1956-01-24 Degler
US2506414A (en) * 1947-12-05 1950-05-02 Bell Telephone Labor Inc Sealed wire contact device
US2570315A (en) * 1948-07-07 1951-10-09 Ford Motor Co Magnetic operated switch
US2648167A (en) * 1948-12-18 1953-08-11 Bell Telephone Labor Inc Machine for manufacturing switches
US2696543A (en) * 1948-12-18 1954-12-07 Bell Telephone Labor Inc Electric switch
US2535400A (en) * 1949-08-25 1950-12-26 Bell Telephone Labor Inc Multicontact dry reed relay
US2764647A (en) * 1952-01-11 1956-09-25 Cook Electric Co Magnetostrictive relay
US2760027A (en) * 1953-05-12 1956-08-21 Iron Fireman Mfg Co High speed relay
US2845506A (en) * 1954-06-28 1958-07-29 Pioneer Electronic Corp High voltage high vacuum relay
US2840660A (en) * 1955-06-16 1958-06-24 G M Giannini & Co Inc Double-throw magnetically operated sealed switch
US2840661A (en) * 1955-06-16 1958-06-24 G M Giannini & Co Inc Magnetic switch device
DE1033762B (en) * 1955-12-28 1958-07-10 Siemens Ag controlled by a magnetic field protection tube changeover contact
US2922856A (en) * 1956-12-20 1960-01-26 Siemens Ag Electromagnetic switch
DE1064428B (en) * 1957-10-23 1959-08-27 Siemens Ag Arrangement for controlling devices on the route by the moving Behaelter
US2997546A (en) * 1958-11-04 1961-08-22 Bell Telephone Labor Inc Switching device
US3030451A (en) * 1958-11-04 1962-04-17 Bell Telephone Labor Inc Switching device
DE1108593B (en) * 1959-02-09 1961-06-08 Werner Voss Means for arming an electric intrusion and anti-theft device, especially for motor vehicles
US3250875A (en) * 1964-01-21 1966-05-10 Wintriss George Reed switch
US3315193A (en) * 1964-11-12 1967-04-18 Briggs & Stratton Corp Reed switch adapted for rapid cycling
DE1514750B1 (en) * 1965-03-16 1970-07-16 Standard Elektrik Lorenz Ag Single or multiple contact in closed Gehaeuse
US3943474A (en) * 1973-10-09 1976-03-09 Shlesinger Jr Bernard E Reed and reed switch therefor
US4038620A (en) * 1973-10-09 1977-07-26 Shlesinger Jr B Edward Magnetic reed switch
US7873437B2 (en) 2003-02-14 2011-01-18 Dyson Technology Limited Autonomous machine
US20060161318A1 (en) * 2003-02-14 2006-07-20 Dyson Technology Limited Autonomous machine
US20060150361A1 (en) * 2003-02-14 2006-07-13 Dyson Technology Limited Autonomous machine
US10198921B2 (en) 2003-02-19 2019-02-05 Glendell N. Gilmore Reed switch apparatus and method of using same
US9580208B2 (en) 2003-02-19 2017-02-28 Glendell N. Gilmore Reed switch apparatus and method of using same
US8111119B2 (en) 2003-02-19 2012-02-07 Gilmore Glendell N Reed switch apparatus and method of using same
US8866570B2 (en) 2003-02-19 2014-10-21 Glendell N. Gilmore Reed switch apparatus and method of using same
US20060125603A1 (en) * 2004-12-09 2006-06-15 Telematics Wireless Ltd. Toll transponder with deactivation means
US8183986B2 (en) * 2004-12-09 2012-05-22 Telematics Wireless Ltd Toll transponder with deactivation means
US20060252469A1 (en) * 2005-05-09 2006-11-09 Roger Lu Shut down mechanism for handheld device
US8040082B2 (en) 2006-05-13 2011-10-18 Linak A/S Linear actuator
US20090091287A1 (en) * 2006-05-13 2009-04-09 Linak A/S Linear Actuator
US20080074214A1 (en) * 2006-09-22 2008-03-27 Julian Poyner Safety switch
US7932644B2 (en) * 2006-09-22 2011-04-26 Rockwell Automation Limited Safety switch
EP2061037A2 (en) * 2007-11-15 2009-05-20 GE-Hitachi Nuclear Energy Americas LLC Method and apparatus for permissive control of a mast and grapple
EP2061037B1 (en) * 2007-11-15 2014-06-25 GE-Hitachi Nuclear Energy Americas LLC Method and apparatus for permissive control of a mast and grapple
US8734262B1 (en) 2008-09-23 2014-05-27 David A. Yovanovich Billiard ball rack positioning system and use thereof
US20110218810A1 (en) * 2010-03-02 2011-09-08 Momilani Ramstrum System for Controlling Digital Effects in Live Performances with Vocal Improvisation
US8620661B2 (en) * 2010-03-02 2013-12-31 Momilani Ramstrum System for controlling digital effects in live performances with vocal improvisation
US20160311698A1 (en) * 2015-04-24 2016-10-27 Maxtec Plastics, Inc. Ultraviolet-ray lamp water sterilization device and method for controlling the same
US10212782B2 (en) 2015-04-30 2019-02-19 William F. Harris, Jr. Device and method for mode control of wildlife-friendly lighting
EP3116080A1 (en) 2015-07-08 2017-01-11 Vestel Elektronik Sanayi ve Ticaret A.S. A high efficiency limiter circuit
WO2017040397A1 (en) 2015-09-04 2017-03-09 3M Innovative Properties Company Personal protective equipment and methods of monitoring time of usage of personal protective equipment
CN105464745A (en) * 2015-12-18 2016-04-06 重庆五福科技有限公司 Engine and engine oil alarm
RU2629002C2 (en) * 2015-12-28 2017-08-24 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Рязанский государственный радиотехнический университет" Sensitivity increasing method of magnetic-controlled switches

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