US2587441A - Device for controlling consumer circuits by means of at least one measuring instrument carrying small currents - Google Patents

Device for controlling consumer circuits by means of at least one measuring instrument carrying small currents Download PDF

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Publication number
US2587441A
US2587441A US87142A US8714249A US2587441A US 2587441 A US2587441 A US 2587441A US 87142 A US87142 A US 87142A US 8714249 A US8714249 A US 8714249A US 2587441 A US2587441 A US 2587441A
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United States
Prior art keywords
relay
contacts
relays
contact
controlling
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Expired - Lifetime
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US87142A
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English (en)
Inventor
Buser Theophil
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Johnson Electric Switzerland AG
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Johnson Electric Switzerland AG
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Publication date
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Publication of US2587441A publication Critical patent/US2587441A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
    • H01H47/226—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil for bistable relays

Definitions

  • the device according to the invention is characterised in that it comprises two relays having armatures held in working position by means of remanence, these relays operating alternately groups of contacts mechanically coupled with their armatures, so that the measuring instrument carries only the current necessary for nullifying the remanence. This allows the energy carried by these instruments to be reduced to a minimum and to reverse these instruments currentless.
  • Fig. 1 is an elevation of the controlling device
  • Fig. 2 is a top view
  • Fig. 3 a partly sectional side view
  • Fig. 4 is a wiring diagram of the device which is operated by alternating current.
  • A' double-armed tipping armature 8 is mounted on the outer leg I. of each of the'ma'gnet yokes 4.
  • the horizontal legof' the' armatures 8' carries '1 Claims. (01. ire-s) an iron piece 9, while the other leg leans against contact springs Ill and H holding the armature in the normal or rest position shown in Fig. 3. In this position the back or rest contact i2 is closed and the operating contact it opened. Both contacts belong to the relay.
  • the conditions as regards the spring pressure and the magnetic properties of the iron piece 9' are such that the armature, when attracted, remains in this position (working position) owing to remanence, and holds the working contact i3 closed and the back contact I2 opened, until a demagnetising current traverses the coil and nullifies the remanence.
  • rockers l5 and I6 are mounted on a bracket i l of insulating material by means of a shaft 20.
  • Each rocker carries a knife edge I! against which the one end of a leaf spring 18 bears, while the other end of this spring leans against the knife edge l9 fixed to the bracket I l.
  • the position of the shaft 20' with regard to the knife edges i! and I9 is chosen so that a dead center position of the rockers cannot occur. Therefore, the rockers are either inclined to the right or to the left.
  • The'rockers l5 and it are mechanically coupled together by means of two bars 24 fixed to an arm 2i. Therefore, they can only move together and their position is determined by the armature 8 because the arm 25 extends at both ends below the armatures.
  • the measuring instrument controls the temperature of the medium heated to maintain the temperature within prescribed limits.
  • the resistances W1 and W2 constitute, together with the unnumbered resistances which are connected to themin series, voltage dividers which reduce the line voltage to such an extent that it is just sufficient for cancelling the remanence. Compared with the series resistors, this has the advantage that the switching capacity of the contacts of the instruments is reduced in accordance with the proportion of the voltage divider.
  • the armature is released and the contacts Zr and 2a reversed. 2a breaks the load circuit and 21' closes the energizing circuit of the relay I through I5a.
  • the relay l is energised and reverses the rockers I 5, [6, so that the feed current of the relay l is interrupted at the same time and the demagnetizing circuit of the relay prepared through the contact la closed by the attraction of the relay I.
  • the armature of the relay 1 remains in attracted position so that on the temperature having brought the stud Z to the minimum contact, the relay releases the armature, whereby the contacts la and Ir are reversed, and the feed circuit of the relay 2 is closed, which causes reversing of the rockers l5, l6 and their return to the position shown in full lines again.
  • the demagnetising circuit of the relay 2 is prepared again, so that on the maximum temperature being reached, the armature of this relay takes the normal position again and the cycle may begin anew.
  • the contacts of the measuring instrument carry only the very small current necessary for nullifying the remanence, while opening the contacts always takes place currentless. Conditions may easily be obtained, at which the current necessary for nullifying the remanence is small enough to allow an absolutely safe working of supersensitive contacts. Therefore, the illustrated controller provides for the possibility of using measuring instruments for regulating purposes, the contacts of which carry a very small energy, without necessitating very expensive amplifying means.
  • a device for controlling the flow of current in an electrical load an electrical circuit, a control switch, a pair of relays each comprising a core, a winding, an armature and contacts movable by said armature, contacts of at least one of said relays being connected to control the flow of current in said electrical circuit, a pair of tumbler switches having each two fixed contacts and being both operably connected with said relay armatures so as to be both movable from one operative position to another by energizing either of said relays while the other is deenergized, means including contacts of said relays connected to said fixed contacts of one of said tumbler switches for momentarily supplying energizing currentalternatively to said relays, said last mentioned tumbler switch being moved by the armature of the energized relay to interrupt the energizing current and to prepare a circuit for energizing the other relay, the armature of the momentarily energized relay being thereafter held in energized position by residual magnetism, and meansinelud
  • an electrical circuit comprising one contact of one of said relays, a pair of tumbler switches having each two fixed contacts, a voltage reducing network interconnected with said electrical circuit and said controlling switch, said voltage reducing network, said controlling switch, one of said tumbler switches and each of said relay windings being connected each to one of said fixed 'contacts and forming a pair of demagnetizing circuits for alternately demagnetizing one of said relays, a second of said tumbler switches, one contact of each of said relays connected to the fixed contacts of said second tumbler switch and each one of said relay windings forming a pair of ener gizing circuits for energizing each of said relays after release of the other.
  • an electrical circuit comprising one of said operating contacts, a pair of tumbler switches in operable connection with said armatures having each two fixed contacts, a pair of voltage reducing networks interconnected with said electrical circuit by being connected each with one of said operating contacts respectively, the operating contact of one relay, the said voltage reducing network connected to it, said controlling switch, a first of said tumbler switches and the relay winding of that same relay forming a circuit carrying a small demagnetizing current, a second of said tumbler switches, the back contact of one of said relays and the relay winding of the other of said relays forming an energizing circuit, energizing one of said relays after release of the said relays.
  • a device for controlling the fiow of current in an electrical load an electrical circuit, a controlling switch, a pair of relays electrically connected to the contacts of said controlling switch, each of said relays being provided with a winding, an armature held in working position by means of residual magnetism, a back contact and an operating contact, a pair of tumbler switches in operable connection with said armatures each having two fixed contacts and two movable contacts, the first of said tumbler switches interconnecting alternately one of said relay windings and the controlling switch, the second of said tumbler switches interconnecting alternately one of said back contacts and the said electrical circuit, a pair of voltage dividers each being interconnected with the said electrical circuit by being connected with the operating contact of one of said relays and each having a tap alternately interconnectable with the said first tumbler switch by the said controlling switch, the winding of one relay being interconnected with the said electrical circuit by the back contact of the other relay and the second tumbler switch, whereby an energizing circuit is formed for each relay when
  • a controlling switch having two fixed contacts and a controllable contact member, a pair of relays electrically connected to the contacts of said controlling switch, each of said relays being provided with a winding and an armature held in working position by means of residual magnetism, and with a back contact and an operating contact
  • a pair of tumbler switches each comprising a pair of fixed contacts and a rocker in operable connection with said armatures and having a contact at each end engageable respectively with said fixed contacts, each fixed contact of the first of said tumbler switches being connected to one of the said relay windings and the rocker of said first tumbler switch being connected to said controllable contact member, and the fixed contacts of the second of said tumbler switches being connected each to one of said back contacts, the rocker of said second tumbler switch being connected to said electrical circuit, a pair of voltage dividers connected to one of said operating contacts and each formed by two resistances with a tap between said resistances, the said fixed contacts
  • a device for controlling the fiow of current in an electrical load an electrical circuit, a pair of relays having each a winding, an armature held in working position by residual magnetism, a back contact and an operating contact controlled by said armature, a pair of alternating switches having each two fixed contacts and a contact member operably connected to said armatures, a controlling switch, a low voltage supply, an energizing circuit for each relay comprising the back contact of one of said relays, one of said alternating switches and the winding of the other relay connected in series, and a deenergizing circuit for each relay comprising the operating contact of one of said relays, said low voltage supply, said controllin switch, the other of said alternating switches and the winding of that same relay connected in series, one of said operating contacts controlling said electrical circuit.
  • a device for controlling the fioW of current in an electrical load an electrical circuit, a pair of relays having each a winding, an armature held in working position by residual magnetism, a back contact and an operating contact, said back contact and said operatin contact be ing controlled by said armature, a pair of alternating switches having each two fixed contacts and a contact member operably connected with said armatures so as to be in one operative position or another according to whether the one or the other of said relay is energized, a controlling switch having two fixed contacts and a controllable contact member, a pair of voltage dividers each having a tap respectively connected with one of said fixed contacts of said controlling switch, an energizing circuit for each relay comprising the back contact of one of said relays, one of said alternating switches and the Winding of the other relay connected in series, and a deenergizing circuit for each relay comprising the operating contact of one of said relays, one of said voltage dividers, said controlling switch, the other of said alternating switches, said

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US87142A 1947-07-18 1949-04-13 Device for controlling consumer circuits by means of at least one measuring instrument carrying small currents Expired - Lifetime US2587441A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH283209T 1947-07-18

Publications (1)

Publication Number Publication Date
US2587441A true US2587441A (en) 1952-02-26

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US87142A Expired - Lifetime US2587441A (en) 1947-07-18 1949-04-13 Device for controlling consumer circuits by means of at least one measuring instrument carrying small currents

Country Status (5)

Country Link
US (1) US2587441A (enrdf_load_stackoverflow)
CH (1) CH283209A (enrdf_load_stackoverflow)
FR (1) FR971050A (enrdf_load_stackoverflow)
GB (1) GB659449A (enrdf_load_stackoverflow)
NL (1) NL72740C (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3581157A (en) * 1969-01-17 1971-05-25 Pettibone Corp Electrical relay circuitry

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1125693B (de) * 1953-11-06 1962-03-15 Karl Rabofsky G M B H Maschine Temperaturregler

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1624132A (en) * 1921-03-26 1927-04-12 Brown Engineering Corp Gas-control appliance
US2331697A (en) * 1941-01-31 1943-10-12 Gen Electric Control system
GB564935A (en) * 1943-04-16 1944-10-19 Standard Telephones Cables Ltd Improvements in or relating to electrical overload and like cut-out arrangements
US2552636A (en) * 1949-02-14 1951-05-15 Herbert Clemmens Time-delay relay arrangement

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1624132A (en) * 1921-03-26 1927-04-12 Brown Engineering Corp Gas-control appliance
US2331697A (en) * 1941-01-31 1943-10-12 Gen Electric Control system
GB564935A (en) * 1943-04-16 1944-10-19 Standard Telephones Cables Ltd Improvements in or relating to electrical overload and like cut-out arrangements
US2552636A (en) * 1949-02-14 1951-05-15 Herbert Clemmens Time-delay relay arrangement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3581157A (en) * 1969-01-17 1971-05-25 Pettibone Corp Electrical relay circuitry

Also Published As

Publication number Publication date
FR971050A (fr) 1951-01-11
CH283209A (fr) 1952-05-31
GB659449A (en) 1951-10-24
NL72740C (enrdf_load_stackoverflow) 1953-07-15

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