US3236965A - Sealed switch for strong currents - Google Patents

Sealed switch for strong currents Download PDF

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Publication number
US3236965A
US3236965A US302585A US30258563A US3236965A US 3236965 A US3236965 A US 3236965A US 302585 A US302585 A US 302585A US 30258563 A US30258563 A US 30258563A US 3236965 A US3236965 A US 3236965A
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US
United States
Prior art keywords
magnetic
envelope
contact
supporting
flat spring
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
US302585A
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English (en)
Inventor
Bianco Bruno Dal
Scata Mario
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of US3236965A publication Critical patent/US3236965A/en
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
    • H01H51/00—Electromagnetic relays
    • H01H51/28—Relays 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
    • H01H51/287—Details of the shape of the contact springs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
    • H01H36/0006—Permanent magnet actuating reed switches

Definitions

  • the object of the present invention is a sealed switch for strong currents.
  • a switch of this kind has been already revealed in our pending application in the United States, No. 302,583, filed on August 16,1963, and the present invention has the object to modify the preceding type of switch to obtain a new device which incorporates the known principle of the stored resilience in a metallic blade subjected to a mechanical temporary deformation, as already used in microswitch devices.
  • the purpose of the present invention is then to provide a switch for a relay suitable for switching currents of greater intensity than that carried by the device revealed in the above mentioned patent and suitable to be used with higher operating voltages.
  • a pair of stationary magnetic electrodes cooperate with a movable magnetic armature to which is secured the snap blade carrying the movable contact.
  • FIG. 1 shows an enlarged view of a longitudinal cross section of a switch including all the features, according with the invention
  • FIG. 2 is a side view of the switch illustrated in FIG. 1;
  • FIG. 3 is an enlarged view of a longitudinal cross section of an alternative embodiment of the switch of FIG. 1;
  • FIG. 4 is a side view of the switch of FIG. 3.
  • a magnetically controlled switch structure is enclosed in a metallic container 1, of non-magnetic material (ii. of cylindrical form) closed at one end 2 and open at the opposite end thereof to accommodate a base or metal plug inherent to rethe movable contact by shocks and there- I ture and which faces parallel to the 3,236,965 Patented Feb. 22, 1966 3, which will be sealed to container 1 by welding or other known sealing methods.
  • Plug 3 is provided with insulating insertions 4 of glass or ceramic to insulate and seal the connecting leads 5, 6, 7 forming part of the metallic structure of the switch, which protrude outside from side container to provide soldering terminals, for the external circuit (f.i. a printed circuit) or pins to plug-into suitable socket; and extending internally to the container 1 to support, as it will be described later, the various members, forming the switching structure.
  • the lead 5 is flattened to place and weld thereon the end of a magnetic plate 8 the other end thereof carrying non-magnetic plate 9 which is welded to the latter.
  • a magnetic member 10 has a plane portion welded to plate 9 in such a way that it lies in the plane of plate 8, leaving a gap between the facing edges of plate 8 and member 10 for the purpose described later.
  • Magnetic member 10 is formed by a reversed L bent plate, with an end 11 tapered, to form a tooth directed toward base 3.
  • a flat spring suitably bent, an upper part thereof coming in contact with the top of tooth 11 (FIGS. 1 and 2).
  • This flat spring extends longitudinally within the envelope and is provided at the other end with a double contact button 14.
  • the flat spring is of the microswitch type and is provided with a slot 15 containing an auxiliary corrugated flat spring 16 (FIG. 1) precompressed.
  • a first stationary contact button 19 is secured to the end of lead 6 and a second stationary contact button 20 is welded to the end of lead 7, both protruding inside the container 1 from the base 3, in alignment therebetween and with the double movable contact button 14, leads 6 and 7 being insulated from said base.
  • an external electric circuit is completed through lead 5, plate 8, strip 9, magnetic member 10, resilient spring 13, double button 14, stationary button 19 and lead 6.
  • an external magnetic field which can be created by a coil surrounding the container 1
  • the disc or armature 18 and pieces 8-10 will be drawn together, consequently flat spring 13 will be subjected to an inversion of its resilient action causing double button 14 to snap from contact 19 to contact 20 on which it will exert a constant pressure provided by the resilient force inherent to the material increased by the effect of the small corrugated auxiliary spring 16.
  • FIG. 3 illustrates a modification of part of the magnetic structure in alternative to that shown in FIG. 1 to operate the resilient flat spring of microswitch type.
  • lead 5 is flattened to receive by welding an end of a plate 8 of magnetic material, to the other end of which is welded, on the same side of terminal 5, a member 21, formed by a strip of non magnetic material bent in the form of a reversed L, the end 22 of which incorporates a tooth similar to that shown in FIG. 1.
  • a member 21 formed by a strip of non magnetic material bent in the form of a reversed L, the end 22 of which incorporates a tooth similar to that shown in FIG. 1.
  • an end 12 of a flat spring 23 suitably bent, part of which is contacting tooth 22 of member 21, for the scope already explained in connection with the preceding example.
  • Flat spring 23 is provided, along the longitudinal direction thereof, with two ribs 25, 26 (visible in FIG. 4) and, at its free end, with a double contact button 14.
  • a magnetic member 24 of any shape, but having a plane face in front and parallel to the plane portion of the magnetic piece 8.
  • a stationary contact button 19 is welded to the end of lead 6 and a second stationary button 20 is welded to the end of lead 7, both leads projecting inside container 1 from base 3 in alignment therebetween and with the double contact button 14; all the leads being insulated from the base 3. The adjustments of the air gap and the contact pressure between the ditfer'ent members is made before inserting the structure inside the envelope 1.
  • the resilient flat spring 23 which is shaped so that double button 14 thereon exerts a pressure against stationary button 19, is further loaded by slightly bending tooth 22 inward toward member 21. With this operation also air-gap between magnetic members 24-8 is drawn for the best sensitivity of operation.
  • a switching relay comprising: I
  • first, second and third conductive leads extending through said plug and sealed thereto to provide separately insulated contact leads extending both inside and outside said non-magnetic envelope, first and second magnetic members,
  • said second one of said conductive leads supporting the first one of said single faced contact buttons within the envelope
  • said third one of said conductive leads supporting the second one of said single faced contact buttons within the envelope causing it to occupy a position facing the first contact button
  • a curved member having first and second ends
  • a resilient fiat spring of the microswitch type having first and second ends
  • said second end of said flat spring supporting a double faced contact button in a position between said first and second single faced contact buttons
  • said fiat spring being mechanically biased at said first end to hold one face of said double faced contact button in contact with said first one of said single faced contact buttons
  • said second magnetic member cooperating with said first magnetic member in the presence of a magnetic field to cause said flat spring to change its stored state of resilience to snap the second face of said double faced contact button into contact with said second one of said single faced contact buttons, said snap causing.
  • said means for adjusting contact pressure including an extension of said curved member
  • said extension being bendable to engage said flat spring to adjust the mechanical bias of the flat spring and thus said contact pressure.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Contacts (AREA)
  • Switch Cases, Indication, And Locking (AREA)
US302585A 1962-08-30 1963-08-16 Sealed switch for strong currents Expired - Lifetime US3236965A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1720762 1962-08-30
IT1738062 1962-08-31

Publications (1)

Publication Number Publication Date
US3236965A true US3236965A (en) 1966-02-22

Family

ID=26326925

Family Applications (2)

Application Number Title Priority Date Filing Date
US302585A Expired - Lifetime US3236965A (en) 1962-08-30 1963-08-16 Sealed switch for strong currents
US302583A Expired - Lifetime US3238325A (en) 1962-08-30 1963-08-16 Magnetically operated sealed switch unit

Family Applications After (1)

Application Number Title Priority Date Filing Date
US302583A Expired - Lifetime US3238325A (en) 1962-08-30 1963-08-16 Magnetically operated sealed switch unit

Country Status (6)

Country Link
US (2) US3236965A (enrdf_load_stackoverflow)
BE (1) BE638325A (enrdf_load_stackoverflow)
CH (2) CH416836A (enrdf_load_stackoverflow)
GB (2) GB1048717A (enrdf_load_stackoverflow)
IT (2) IT678577A (enrdf_load_stackoverflow)
NL (1) NL297407A (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3329914A (en) * 1965-02-26 1967-07-04 Int Standard Electric Corp Sealed magnetic contact device
US3418608A (en) * 1966-03-20 1968-12-24 Electronic Controls Inc Magnetically actuated miniature relay
US3541482A (en) * 1967-12-21 1970-11-17 Gordos Corp Folder reed switches
US3544930A (en) * 1968-02-29 1970-12-01 Matsushita Electric Works Ltd Electromagnetic multicontact relay
US3711799A (en) * 1971-08-20 1973-01-16 Cherry Electrical Prod Encapsulated magnetic proximity switch
US3711749A (en) * 1971-10-07 1973-01-16 M Koblents Reed switch
US3980979A (en) * 1974-03-25 1976-09-14 Bestobell Mobrey Limited Magnetically operated switch unit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2098552A6 (enrdf_load_stackoverflow) * 1970-07-20 1972-03-10 Telic
GB2342779A (en) * 1998-08-14 2000-04-19 Jacek Spoczynski Sealed magnetic switch

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2037535A (en) * 1933-09-27 1936-04-14 Gen Electric Vacuum apparatus
US2180701A (en) * 1936-11-21 1939-11-21 Edison Inc Thomas A Electric switch
US2242636A (en) * 1936-10-30 1941-05-20 Edison Inc Thomas A Electric switch
US2693520A (en) * 1951-02-15 1954-11-02 Bruno Angel Electric switch
GB894378A (en) * 1959-12-11 1962-04-18 Standard Telephones Cables Ltd Magnetically operated sealed contact relay for large currents
US3118987A (en) * 1960-06-10 1964-01-21 Warner W Clements Electromagnetic bistable relay

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2257900A (en) * 1937-12-01 1941-10-07 Honeywell Regulator Co Tube switch
US2892052A (en) * 1956-02-15 1959-06-23 G M Giannini & Co Inc Magnetically operated sealed switch apparatus
US2957961A (en) * 1957-08-14 1960-10-25 Clare & Co C P Switching device
US3001046A (en) * 1958-05-07 1961-09-19 Jennings Radio Mfg Corp Vacuum relay
US2993104A (en) * 1959-01-21 1961-07-18 Gen Electric Electromagnetic relay
US3146327A (en) * 1962-11-06 1964-08-25 Nippon Electric Co Sealed magnetically operable switch

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2037535A (en) * 1933-09-27 1936-04-14 Gen Electric Vacuum apparatus
US2242636A (en) * 1936-10-30 1941-05-20 Edison Inc Thomas A Electric switch
US2180701A (en) * 1936-11-21 1939-11-21 Edison Inc Thomas A Electric switch
US2693520A (en) * 1951-02-15 1954-11-02 Bruno Angel Electric switch
GB894378A (en) * 1959-12-11 1962-04-18 Standard Telephones Cables Ltd Magnetically operated sealed contact relay for large currents
US3118987A (en) * 1960-06-10 1964-01-21 Warner W Clements Electromagnetic bistable relay

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3329914A (en) * 1965-02-26 1967-07-04 Int Standard Electric Corp Sealed magnetic contact device
US3418608A (en) * 1966-03-20 1968-12-24 Electronic Controls Inc Magnetically actuated miniature relay
US3541482A (en) * 1967-12-21 1970-11-17 Gordos Corp Folder reed switches
US3544930A (en) * 1968-02-29 1970-12-01 Matsushita Electric Works Ltd Electromagnetic multicontact relay
US3711799A (en) * 1971-08-20 1973-01-16 Cherry Electrical Prod Encapsulated magnetic proximity switch
US3711749A (en) * 1971-10-07 1973-01-16 M Koblents Reed switch
US3980979A (en) * 1974-03-25 1976-09-14 Bestobell Mobrey Limited Magnetically operated switch unit

Also Published As

Publication number Publication date
BE638325A (enrdf_load_stackoverflow)
NL297407A (enrdf_load_stackoverflow)
CH416836A (de) 1966-07-15
GB1048717A (en) 1966-11-16
IT678587A (enrdf_load_stackoverflow)
CH416789A (de) 1966-07-15
GB1046519A (en) 1966-10-26
US3238325A (en) 1966-03-01
IT678577A (enrdf_load_stackoverflow)

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