US2927178A - Sealed-in contact device having contacts providing for uniform performance characteristics - Google Patents

Sealed-in contact device having contacts providing for uniform performance characteristics Download PDF

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Publication number
US2927178A
US2927178A US783587A US78358758A US2927178A US 2927178 A US2927178 A US 2927178A US 783587 A US783587 A US 783587A US 78358758 A US78358758 A US 78358758A US 2927178 A US2927178 A US 2927178A
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US
United States
Prior art keywords
contact
sealed
springs
performance characteristics
contacts
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
US783587A
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English (en)
Inventor
Nitsch Rudolf
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.)
Siemens and Halske AG
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Siemens and Halske AG
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 Siemens and Halske AG filed Critical Siemens and Halske AG
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Publication of US2927178A publication Critical patent/US2927178A/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/64—Protective enclosures, baffle plates, or screens for contacts
    • H01H1/66—Contacts sealed in an evacuated or gas-filled envelope, e.g. magnetic dry-reed contacts
    • 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

Definitions

  • NITSCH 2,927,178 SEALED-IN CONTACT DEVICE HAVING CONTACTS PROVIDING FOR UNIFORM PERFORMANCE CHARACTERISTICS Filed Dec. 29, 1958 2 Sheets-Sheet 1 March 1, 1960 R. NITSCH 2,927,178
  • the object of the invention isto provide for uniformperformance characteristics, particularly uniform holding values.
  • holding.- valuei. is intended to mean the energization or excitation produced by the energizing coil, which just suflices to hold a sealedin contact, for example, a make contact, in closed position.
  • the requirement with respect to uniform performance characteristics and identical holding values does not only apply to individual sealed-in contacts one with respect to the other but also to relays constructed of sealed-in contacts.
  • the invention shows a way of obtaining a very narrow tolerance range for the holding value by particular construction of the sealed-in contacts in the fabrication thereof. This is made possible according to the invention by constructing in arcuate or ball-shaped manner at least the contact-making point of one contact spring facing the contact-making point of the other contact spring.
  • Figs. 1, 2 and 3 show a known sealed-in make contact comprising fi-at contact springs in closed position from the side (Fig. 1) and showing the contact points in crosssectional respectively longitudinal and transverse views (Figs. 2 and 3);
  • Figs. 4 and 5 indicate the unavoidable relative angular tilting displacement of the contacts extending essentially in two directions;
  • Figs. 6 to 11 show a sealed-in make contact comprising flat contact springs with the contact-making points con- DEVIGEv HAVJNGsnQON.
  • Figs. 6 to 11 show cooperating flat contact springs made in accordance with the inven tion in all possible positions thereof.
  • Figs. 6 to 8 show the contact springs from the side and Figs. 9 to 11 in transverse sections taken along the contact points.
  • Fig. 6 indicates the normal contact position.
  • a length X appears entered on each side of the central point of contact engagement, the combined lengths XX delimiting the operatively elfective pole surface or area for the magnetic flux.
  • the operatively efiective pole surface or area will remain constant in any possible angular tilting displacement of the contact springs. This is even in case of the illustrated extreme angular'displacements (such as will never occur in practice) due to the arcuate or ball-like formation of the contact-making point of one of the contact springs.
  • the angular tilting displacement of the contact springs may in practice he kept very small and formation of the arcuate surface of the contact-making point on one spring to correspond exactly to a spherical line is accordingly unnecessary. This will also be seen from the fact that very slight elevations of the contact-making point will Patented 6 various possible.
  • the construction of the contact springs according to the invention produces further advantages:
  • the operatively efiective pole surface can be provided in predetermined manner by choice of the radius of curvature of the contact point provided on one of the flat contact springs, thus making it possible to determine the desired performance characteristic with respect to the holding value.
  • the remaining dimensions of the contact springs remain unaffected and the energization value retains its original value. This means that the holding value can always be determined as desired without afiecting the energization value.
  • the contact spring made according to the invention as shown in Figs. 12 and 13 respectively in top elevation and from the side is provided with the arcuate elevation E which is in this case produced by stamping.
  • a sealed-in contact device having two cooperatively disposed generally flat contact springs arranged with the contact-making ends in overlapping normally open relationship spaced apart by a gap extending therebetween, which springs are operatively actuated responsive to magnetic flux caused to flow therethrough and across said gap to setup magnetic attraction forces operative to effect attraction between said contact-making ends of said springs to place such ends in closed contact-making engagement, magnetic holding forces being applied to said springs to maintain said closed contact-making engagement, wherein said springs, owing to fabrication irregularities, may assume angularly tilted position one with respect to the other, thereby adversely affecting the magnetic flux effecting attraction therebetween and also the magnetic holding forces applied thereto; a device for nullifying the adverse effects of the tilted positions of said springs, said device consisting in providing one of said contct springs with a contact-making point of arcuate configuration facing the contact-making point of the other contact spring and amounting in height to about 20 percent of the normal spacing between said contact springs in the open position thereof, thereby

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Contacts (AREA)
  • Measuring Leads Or Probes (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
US783587A 1958-01-24 1958-12-29 Sealed-in contact device having contacts providing for uniform performance characteristics Expired - Lifetime US2927178A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES56702A DE1240588B (de) 1958-01-24 1958-01-24 Magnetisch betaetigbarer, gasdicht abgeschlossen unter Schutzgas arbeitender Kontakt

Publications (1)

Publication Number Publication Date
US2927178A true US2927178A (en) 1960-03-01

Family

ID=7491293

Family Applications (1)

Application Number Title Priority Date Filing Date
US783587A Expired - Lifetime US2927178A (en) 1958-01-24 1958-12-29 Sealed-in contact device having contacts providing for uniform performance characteristics

Country Status (7)

Country Link
US (1) US2927178A (enrdf_load_stackoverflow)
BE (1) BE574451A (enrdf_load_stackoverflow)
CH (1) CH364569A (enrdf_load_stackoverflow)
DE (1) DE1240588B (enrdf_load_stackoverflow)
FR (1) FR1214469A (enrdf_load_stackoverflow)
GB (1) GB880241A (enrdf_load_stackoverflow)
NL (2) NL234767A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3934214A (en) * 1975-03-31 1976-01-20 Bell Telephone Laboratories, Incorporated Sealed contact having tapered reed tips
US4594487A (en) * 1984-12-07 1986-06-10 Galland Henning Nopak, Inc. Mounting means for proximity sensing device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1879131A (en) * 1930-12-25 1932-09-27 Gen Electric Method of degassing vacuum apparatus
US1941273A (en) * 1931-10-29 1933-12-26 Gen Electric Vacuum switch
US2506414A (en) * 1947-12-05 1950-05-02 Bell Telephone Labor Inc Sealed wire contact device

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2289830A (en) * 1938-03-29 1942-07-14 Bell Telephone Labor Inc Circuit closing device
US2321834A (en) * 1940-09-28 1943-06-15 Comar Electric Co Relay
US2586309A (en) * 1950-01-13 1952-02-19 Wells Alton R Double arm thermostat
CH278392A (de) * 1951-11-27 1951-10-15 Thomann Ferdinand Magnetisch betätigter Vakuumschalter.
FR1080149A (fr) * 1952-05-28 1954-12-07 El Re Ma Perfectionnements apportés à un relais électrique
DE969149C (de) * 1953-06-28 1958-05-08 Lorenz C Ag Anordnung zur Betaetigung von Kontaktfedern an Relais
US2850602A (en) * 1955-05-16 1958-09-02 North Electric Co Relay contact arrangement
DE1027249B (de) * 1956-09-27 1958-04-03 Siemens Ag Schrittweise schaltender Waehler mit Schutzrohrkontakten

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1879131A (en) * 1930-12-25 1932-09-27 Gen Electric Method of degassing vacuum apparatus
US1941273A (en) * 1931-10-29 1933-12-26 Gen Electric Vacuum switch
US2506414A (en) * 1947-12-05 1950-05-02 Bell Telephone Labor Inc Sealed wire contact device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3934214A (en) * 1975-03-31 1976-01-20 Bell Telephone Laboratories, Incorporated Sealed contact having tapered reed tips
US4594487A (en) * 1984-12-07 1986-06-10 Galland Henning Nopak, Inc. Mounting means for proximity sensing device

Also Published As

Publication number Publication date
FR1214469A (fr) 1960-04-08
GB880241A (en) 1961-10-18
NL234767A (enrdf_load_stackoverflow)
BE574451A (fr) 1959-05-02
CH364569A (de) 1962-09-30
DE1240588B (de) 1967-05-18
NL113871C (enrdf_load_stackoverflow)

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