US1331063A - hastings - Google Patents

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Publication number
US1331063A
US1331063A US1331063DA US1331063A US 1331063 A US1331063 A US 1331063A US 1331063D A US1331063D A US 1331063DA US 1331063 A US1331063 A US 1331063A
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Prior art keywords
magnet
coil
closing
series
shunt
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Expired - Lifetime
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/06—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electromagnetic opening

Definitions

  • a form of switch which hasfrequently been proposed for this purpose is one in which a shunt coil closesthe switch and a: series coil, instead of controlling theI-circuit of the shunt coil, positively prevents the switch from closing by actually holding it open,.that is, the shunt coil pulls against the series, or holding-out coil.
  • the diiiiculty with this type ofswitch is that the value of current in the holding-out winding at which the switch will close depends upon the pull ofthe shunt coil, which of course will vary with the voltage and also with the temperature of the coil.
  • the-setting of the switch, z. e.. the motor current value at which it closes. changes with change of voltage' It also closes at one value of current in the series coil when the shunt coil is cold and another when it is at its operating temperature which is ordinarily about degrees C.
  • the object .of the present invention is to obtain a lock-out magnet h'avinu a shunt closing coil and series lock-out coil in which the balance between the closing and holding open forces will not be aiiected by the varia- Specification of Letters Patent.
  • Figure 1 is a plan view of a contactor embodying my inout magnet having coil 16 and core 17 and a compensating magnet having shunt coil 18 and core 19.
  • Coil 18 is connected in series with the shunt closing'coil l0, and isused for neutralizing the etlectof the variations in pull of the shunt closing magnet.
  • the magnetic circuits of the three magnets are independent of each other.
  • the lever 13 which forms the armature for the closing coil is shown having a projection 15 which forms the armature forthe magnets 16 and 18, but three separate armatures could be 'used, provided that they were rigidly fixed together. 7
  • .open position the lever 13 resting against the stop 20 which is made otnon-magnetic material.
  • .26 is a base of insulating mate rial, 23 and 24: contacts for carrying the main current, and 25 spring for producing wiping action between the contacts in a manner well known in the art. It will be seen that the pulls due to the compensating magnet 18 and lock-out magnet 16, are both opposed to the closing magnet 10.
  • Theonly forces acting on the moving arm oi. the contactor when in the-open position are those due to gravity, lock-out magnet and compensating magnet tending to lock open. and the force due to the shunt coil 10 tending to c ose the contractor. No springs are used.
  • the compensating andvlock-out magnets are both fitted with adjustable air gaps, so that the magnetic circuit of either can be altered without affecting the magnetic circuit of the shunt closing coil.
  • the compensating magnet circuit is adjusted in the first place to give the necessarv compensating eflect-bv means of the adjustable iron cap 22. which is then permanently locked in position [on the core 19.
  • the coil 18 of this magnet is eerie rit -tee an eee ea a l 0 the same changes in current, due to heating and voltage variation, occur in both coils.
  • the magnet circuit of 18 is proportioned so that any change in the pull of theclosing magnet is balanced by a corresponding change of the pull due to 18, over the workingsrafigeof the contacto'r.
  • the cap 22 enables small adjustments to be made to compensate for variations in manufacture;
  • the adjustableiron cap 21 of the series lock-out magnet is'used for adjusting the reluctance I .of the magnetic pathof this magnet, so that 'the lever l5'wfll be released and contactor sa'ting.magnet, assuming that this operates .at .the same leverage as the closing coil.
  • the adjustment is not madeby altering the magnetic path, but by altering the tension of a spring applied so as to oppose the force of the lock-out 'ni'agnet the "arrangement being such that the lock-out magnet has to attract its armature to it through an air gap'there is a possibility of the contactor closing while the current in the series coil is higher than the desired value.
  • a higherivalue of current is required in the series coil to attract the armature through the air gap, than to retain it in a position closer to the coil.
  • An electromagnetic switch having a single movable pivoted switch lever, a shunt wound closing magnet for actuating the switch, a series lock-out magnet and a shunt wound compensating magnet the coil of which is in series with the closing coil and the'pull of which assists the-lock-out magnet, the flux paths of the series lock-out magnet and the shuntavound compensating magnet being independent of other 2.
  • An electromagnetic switch of the lockand inde' pendent of that of the closing magnet whereby variations in the closing force due to variations in the current in the shunt wound closing magnet are balanced by corresponding variations in the pull of the compensating magnet so that the switch will be actuated when the current in the opposing magnet drops to a predetermined value.
  • An electromagnet switch having a single movable pivoted switch lever, a shunt wound closing magnet on one side of the fulcrum of said lever, a series lock-out magnet and a shunt wound compensating magnet the coil of which is in series with the closing coil and the pull of which assists the lock-out magnet, on the other side of the fulcrum of said lever, the flux paths of the series lockout magnet and the shunt wound compensating magnet being independent of each other and independent of that of the closing magnet, whereby variations in the closing force due to variations in the current in the shunt Wound closing magnet are balanced by corresponding variations in the pull of the compensating magnet so that the switch will be actuated when the current in the opposing magnet drops to a predetermined value.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Magnetic Treatment Devices (AREA)
  • Electromagnets (AREA)
US1331063D hastings Expired - Lifetime US1331063A (en)

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Application Number Priority Date Filing Date Title
GB132610T

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US1331063A true US1331063A (en) 1920-02-17

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US (1) US1331063A (enrdf_load_stackoverflow)
GB (1) GB132610A (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2303309C1 (ru) * 2006-06-19 2007-07-20 Общество с ограниченной ответственностью "Технос" Выключатель автоматический быстродействующий
RU2310944C2 (ru) * 2005-12-22 2007-11-20 Общество с ограниченной ответственностью "Технос" Выключатель быстродействующий автоматический постоянного тока
RU2310945C1 (ru) * 2006-01-30 2007-11-20 Общество с ограниченной ответственностью "Технос" Выключатель быстродействующий автоматический постоянного тока
RU2356122C1 (ru) * 2007-11-06 2009-05-20 Общество с ограниченной ответственностью "Технос" Выключатель автоматический быстродействующий
RU2375780C1 (ru) * 2008-08-04 2009-12-10 Общество с ограниченной ответственностью "Технос" Привод выключателя автоматического быстродействующего
RU2387038C1 (ru) * 2008-09-29 2010-04-20 Общество с ограниченной ответственностью "Технос" Выключатель автоматический быстродействующий постоянного тока
RU2396631C1 (ru) * 2009-03-17 2010-08-10 Общество с ограниченной ответственностью "Технос" Выключатель автоматический быстродействующий
RU2440638C1 (ru) * 2010-10-11 2012-01-20 Общество с ограниченной ответственностью "Технос" Выключатель автоматический быстродействующий

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2310944C2 (ru) * 2005-12-22 2007-11-20 Общество с ограниченной ответственностью "Технос" Выключатель быстродействующий автоматический постоянного тока
RU2310945C1 (ru) * 2006-01-30 2007-11-20 Общество с ограниченной ответственностью "Технос" Выключатель быстродействующий автоматический постоянного тока
RU2303309C1 (ru) * 2006-06-19 2007-07-20 Общество с ограниченной ответственностью "Технос" Выключатель автоматический быстродействующий
RU2356122C1 (ru) * 2007-11-06 2009-05-20 Общество с ограниченной ответственностью "Технос" Выключатель автоматический быстродействующий
RU2375780C1 (ru) * 2008-08-04 2009-12-10 Общество с ограниченной ответственностью "Технос" Привод выключателя автоматического быстродействующего
RU2387038C1 (ru) * 2008-09-29 2010-04-20 Общество с ограниченной ответственностью "Технос" Выключатель автоматический быстродействующий постоянного тока
RU2396631C1 (ru) * 2009-03-17 2010-08-10 Общество с ограниченной ответственностью "Технос" Выключатель автоматический быстродействующий
RU2440638C1 (ru) * 2010-10-11 2012-01-20 Общество с ограниченной ответственностью "Технос" Выключатель автоматический быстродействующий

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