US2455699A - Relay for reliable operation with definite excitation - Google Patents

Relay for reliable operation with definite excitation Download PDF

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Publication number
US2455699A
US2455699A US516994A US51699444A US2455699A US 2455699 A US2455699 A US 2455699A US 516994 A US516994 A US 516994A US 51699444 A US51699444 A US 51699444A US 2455699 A US2455699 A US 2455699A
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Prior art keywords
armature
relay
spring
movement
curve
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Expired - Lifetime
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US516994A
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English (en)
Inventor
Perret Henri
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Landis and Gyr AG
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Landis and Gyr AG
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/13—Electromagnets; Actuators including electromagnets with armatures characterised by pulling-force characteristics
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature
    • H01H50/20—Movable parts of magnetic circuits, e.g. armature movable inside coil and substantially lengthwise with respect to axis thereof; movable coaxially with respect to coil

Definitions

  • V l v Relays are of very common applicationin elec-' trical engineeringand consist principally of an But no matter ,what type is employed two main groups can be distinguishedjorall relays accorcling to'their application. In the first group the relay has to perform a certain work at aspecified time, which can bevvreadily accomplished by adequate excitation of themagnet. In the second group the relay has to do its work with a definite excitation and even with marginal excitation the movement should be sure and distinct.
  • the present invention refers to relays of the second group.
  • the magnetic force of attraction takes a hyperbolic course in function of the armature distance while the resetting force of the counter-spring is linear.
  • the resetting spring must be loaded When the excitation of such a relay is brought about; the armature begins to move as soon as the magnetic force of attraction is greater than the load by the resetting spring.
  • Fi s. 2 3; 4 n 5 flatma es; rig. 6 illustrates a former an armature I ig.7 example of embodiment as rotary armature relay.
  • l p Fig. 8 sh ws an e'xafiibl oi embodiment hinged armature re ay;
  • Fig.9a1atra1viev7thr f Fig. it l ustrates a further eiiamrate' of efiitoai mer t oi the rent anymore and Fig 11a lateral 'vi t ereto. R'eferring more p p 'cii1arl'"' to, Fig. 1, the iii: vention is illustrated s comprising a rotati symmetrical relay armature designated Ii b provided at its lowest part with a bulge, anii bear;
  • oou ariat iieec eo ii home 3 eairies ti e oiioi g winding 4 and isj edfiil'pbd o its lowerfiang' with two lugs orbearingnoses 5 in each of whose centers 5 a toggle lever], is hih'gdai'id movable to a sli ht aterit.
  • the rol er s are borne slightly rotary on one shank ef the togg e evejrs 1.
  • the other wo or the toggl'e'li ers' 1 are tuiii'efci imvaiaiy towards eac other with; their toes linked together y axis I2.
  • a regulating spring l3 fulcruineki at pp'iiit l4 bears fro' rn' b'e aga nst the aiii's 2 and. can best adjusted by,
  • the rsettifiibring m isgsjiipportedby the 15in; ll projecting from the upper flange into the interior or the coil power 3 an testis to press therlay armature I downwardly.
  • Fig. 2 has been represented the direction of the magnetic force of attraction PM and the resetting power PF of the counter-spring in function of the armature stroke s.
  • the direction of the magnetic force of attraction PM in function of the armature distance s has a hyp rbolic character, Whereas the resetting power PF takes a linear course. Both these powers act contrariwise to each other.
  • the magnetic force of attraction and the resetting force of the spring can be better compared with each other.
  • the resetting spring must be loaded, so that its characteristic does not begin at zero point. A movement of the relay armature takes place only at the moment, in which PMZPF.
  • the hatched space between the curves PM and Pr of Fig. 2 corresponds therefore to the entire capacity for work inherent to the armature at the end of the movement in the form of kinetic energy, that is to say, also, to the capacity for work which the relay is able to exert in fulfilling its duty.
  • This capacity for work compared with that of the relays of the first group mentioned hereinbefore is fairly poor.
  • the opposing force PA which has to be totally overcome by the magnetic force of attraction PM is composed, apart from the weight of the armature, of the counter-power PG exerted by the rollers 8 and the resetting force PF of th counter-spring l0.
  • this resulting opposing force PA is represented in conjunction with the magnetic force of attraction PM.
  • the characteristic of a relay according to the invention reveals the following main advantages:
  • the design of the bulge form of the armature I may, of course, differ from that illustrated in Fig. 3 and consequently the characteristic of the relay be adapted to the most exacting requirements.
  • the ratio of the sections A:B in Fig. 5 can be increased or decreased.
  • the section C in Fig. 5 can likewise be modified.
  • the value B can for the rest be entirely eliminated, if a shape accord-- ing to Fig.
  • the relay armature need not be a rotation-symmetrical body, but may have any other suitable shape. It may be also of tubular form as shown in Figs. 10 and 11 and the lead faces may be fitted as special shoulders. In place of two shoulders only one may be provided at a specially appropriate point. For suppressing eddy currents the last mentioned design may, moreovor, be split.
  • the invention is by no means confined to plunger armature relays, but may be applied to rotary and hinged armature relays as well.
  • Fig. 7 reveals such application to a rotary armature relay and Fig. 8 to a hinged armature one.
  • a relay comprising, in combination, an armature, electromagnetic means for moving said armature from a position of rest to a moved position when energized, latching means engageable with said armature to prevent movement toward moved position, disengageable upon predetermined power applied to said armature to permit said movement, and spring means biasing said armature toward said position of rest whereby said latch means may re-engage said armature upon de-energization of said electromagnetic means.
  • a relay comprising, in combination, an armature having a depression in the surface thereof, electromagnetic means for moving said armature in one direction when energized, spring means opposing such movement of the armature and tending to return the armature on deenergization, and latching means engageable with said armature to prevent movement in said direction, disengageable upon predetermined electromagnetic power applied to said armature to permit said movement, said latching means including a latching member for engagement in said depression and resilient means urging said member toward said armature.
  • a relay comprising, in combination, a cylindrical armature having a circumferential rounded depression in the surface thereof, electromagnetic means for moving said armature in one direction when energized, spring means opposing such movement of the armature and tending to return the armature on deenergization, and latching means engageable with said armature to prevent movement in said direction, disengageable upon predetermined electromagnetic power applied to said armature to permit said movement, said latching means including a pair of pivoted elements carrying rounded contacts for engagement in said depression and spring means engaging said elements biasing said elements toward said armature.
  • a relay comprising, in combination, a cylindrical armature having a circumferential rounded depression in the surface thereof, electromagnetic means for moving said armature in one direction when energized, spring means opposing such movement of the armature and tending to return the armature on deenergization, and latching means engageable with said armature to prevent movement in said direction, disengageable upon predetermined electromagnetic power applied to said armature to permit said movement, said latching means including a pair of pivoted elements carrying rounded contacts for engagement in said depression and spring means engaging said elements biasing said elements toward said armature, and means for varying the tension of said spring means upon said elements.
  • a relay comprising, in combination, a cylindrical armature having a circumferential rounded depression in the surface thereof adjacent one end and a circumferential frustoconically formed surface between said depression and said adjacent end, electromagnetic means for moving said armature in one direction when energized, spring means opposing such movement of the armature and tending to return the armature on deenergization, and latching means releasably engageable with said armature said means comprising a pair of oppositely disposed pivoted arms having rounded end portions to engage said armature in said depression and on said frusto-conically formed surface and spring means urging said end portions toward said armature.
  • a relay comprising, in combination, an armature having a rounded depression in the surface thereof, electromagnetic means for moving said armature in one direction when energized, spring means opposing such movement of the armature and tending to return the armature on deenergization, and latching means engageable with said armature to prevent movement in said direction, disengageable upon predetermined electromagnetic power applied to said armature to permit said movement said means including a rounded contact member spring pressed into said depression.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnets (AREA)
US516994A 1942-12-21 1944-01-04 Relay for reliable operation with definite excitation Expired - Lifetime US2455699A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH577545X 1942-12-21

Publications (1)

Publication Number Publication Date
US2455699A true US2455699A (en) 1948-12-07

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US516994A Expired - Lifetime US2455699A (en) 1942-12-21 1944-01-04 Relay for reliable operation with definite excitation

Country Status (7)

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US (1) US2455699A (xx)
BE (1) BE453635A (xx)
CH (1) CH234436A (xx)
DE (1) DE862804C (xx)
FR (1) FR900447A (xx)
GB (1) GB577545A (xx)
NL (1) NL58512C (xx)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3043262A (en) * 1959-03-24 1962-07-10 Purolator Products Inc Magnetic filter signal device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1126434A (en) * 1913-12-09 1915-01-26 Adolph F Feller Controller for electric circuits.
US1257613A (en) * 1917-01-25 1918-02-26 Julia B Stewart Solenoid-operated liquid-fuel-supply-maintaining device for internal-combustion engines.
US1538950A (en) * 1924-05-24 1925-05-26 W H Reisner Mfg Co Circuit-controlling device
US2018479A (en) * 1929-08-31 1935-10-22 Bosch Robert Electromagnetic horn
US2057380A (en) * 1933-12-04 1936-10-13 Lincoln M Keefe Relay

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1126434A (en) * 1913-12-09 1915-01-26 Adolph F Feller Controller for electric circuits.
US1257613A (en) * 1917-01-25 1918-02-26 Julia B Stewart Solenoid-operated liquid-fuel-supply-maintaining device for internal-combustion engines.
US1538950A (en) * 1924-05-24 1925-05-26 W H Reisner Mfg Co Circuit-controlling device
US2018479A (en) * 1929-08-31 1935-10-22 Bosch Robert Electromagnetic horn
US2057380A (en) * 1933-12-04 1936-10-13 Lincoln M Keefe Relay

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3043262A (en) * 1959-03-24 1962-07-10 Purolator Products Inc Magnetic filter signal device

Also Published As

Publication number Publication date
NL58512C (xx)
CH234436A (de) 1944-09-30
BE453635A (xx)
GB577545A (en) 1946-05-22
DE862804C (de) 1953-01-12
FR900447A (fr) 1945-06-28

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