US2419396A - Retarded shaded pole motor - Google Patents

Retarded shaded pole motor Download PDF

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Publication number
US2419396A
US2419396A US522685A US52268544A US2419396A US 2419396 A US2419396 A US 2419396A US 522685 A US522685 A US 522685A US 52268544 A US52268544 A US 52268544A US 2419396 A US2419396 A US 2419396A
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US
United States
Prior art keywords
disc
contact
winding
resistance
retarded
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
US522685A
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English (en)
Inventor
Frisk Nils Pontus Wilhelm
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
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Publication of US2419396A publication Critical patent/US2419396A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H53/00—Relays using the dynamo-electric effect, i.e. relays in which contacts are opened or closed due to relative movement of current-carrying conductor and magnetic field caused by force of interaction between them
    • H01H53/10—Induction relays, i.e. relays in which the interaction is between a magnetic field and current induced thereby in a conductor

Definitions

  • rtlon relates to an A. ll. relay of the operating with time retardation, in 1 i magnetic fluxes, causing the driving being out of phase in relation to each .,re produced by a winding assembly coma primary winding connected to A. C. r and two secondary windings, each of h encloses a portion of the flux produced any winding and penetrating the d of relay may be employed as an inter relay between a contact device which actuated a magnitude to be controlled and instance a contactor which is actuated by the motion of the disc thereby making the desired switching.
  • the invention is characterized by a device (for instance a cam disc) being moved by the rotation of the disc and controlling a switching device which is arranged to control the circu ts being connectible to the respective secondary windings.
  • Fig. 1 is a perspective view showing the relay and the circuits connected thereto.
  • Fig. 2(c c) are end views showing different positions of the cam disc provided on the isit oi the rotor disc and the contacts operated 1 disc.
  • Fig. 3 shows in perspective a modithe invention whereby the shaft of the adapted to operate a rheostat.
  • the spring assembly 2 I-23 is assumed to be actuated by e. g. a thermostat which, at a given temperature, closes the contact 2l--22 and, at another temperature, closes the contact ZI-23.
  • the device may be employed for instance for adjusting radiator heaters, the contact 2l-22 thereby being closed by a heat sensitive device such as a thermostat when the temperature exceeds a certain value, the disc thereby turning in one direction and the shaft ll operating the radiators so that the heat supply decreases whilst, when the temperature falls below a certain value, the contact El -23 is closed, thus by the turning of the disc in opposite direction increasing the heat supply.
  • the device operates in the following manner.
  • in the transmitter G has its middle position and the cam disc l2 2. position as shown in the centre detail of Fig. 2, in which position the spring 14 does not make contact with any of the springs I3 and (5.
  • the disc 8 then has its zero position and is influenced only by the flux from the winding 2 which flux, upon penetrating the disc, branches symmetrically to the limbs 4 and 3, no driving torque thereby being produced. Should now, on exceeding the given temperature, for instance, the winding 5 be short-circuited by the contact 21-22, a dissymmetry follows in the fluxes which produces a clockwise operating driving torque causing the disc 8 to rotate. As soon as the disc le'aves its zero position the cam disc 12 closes the contact l3, l4 so that the winding 8 is short-circuited over resistance R. This position of the cam disc and the springs is shown in Fig. 2a.
  • the disc will be influenced by a driving torque in the opposite direction which torque, however-the resistance R having a high value-does not suflice to overcome the first torque. Consequently, the disc 8 will turn clockwise until the shaft I l produces a decrease of the heat supply in which position the shaft II is arrested by means of a cam 3! on the disc [2 engaging a stop 33 as shown in Fig. 2a-c.
  • the temperature later becomes normal and the contact 2 l--22 is broken the short-circuiting for the winding 5 is broken.
  • the relay as shown in Fig. la-c may be adapted in two steps to switch in a resistance comprising two parts 4
  • the winding 5 is shortcircuited and thus the disc has one of its outer positions no part of the resistance being switched in, as shown in Fig. 4a.
  • during the influence of the controlling magnitude is brought to its centre position the disc, on account of the winding 6 by means of the cam disc being connected to the resistance R, is brought to its centre position where it remains.
  • the arm 40 engages contact 44 thereby switching in one half of the resistance 42, Fig. 411.
  • the spring 2! makes contact with the spring 23, the winding 6 is shortcircuited and the disc turns in the same direction as before to its other outer position, the arm 40 thereby engaging the contact 45 so that the entire resistance 4l-42 is connected.
  • the arrangement according to the invention may also be modified in such a manner shown in Fig. 3 on the drawing that the resistance R is short-circuited and the contact springs [3-45 and 2
  • the sliding contact of the potentiometer P1 is controlled by the shaft H and the sliding contact of the other potentiometer P2 is controlled by the thermostat G.
  • alternating current relay 9. main winding adapted to be energized by alternating current, secondary coils adjacent said winding, a rotor rotatable upon short circuiting one of said secondary coils, a resistance, and means operated by rotor rotating incident to short circuiting of one of said secondary coils to connect the other secondary coil with a resistance whereby the second mentioned secondary coil exerts a driving torque on said rotor in opposition to and of less value than the rotating influence of the short circuited secondary coil.
  • a rotor In an alternating current relay, a rotor, a main winding adapted to be energized by alternating current, secondary coils operable when alternately short circuited to cause the rotor to rotate in opposite directions, a resistance, and means operated by the rotor rotating in either direction incident to short circuitin of one of said secondary coils to connect the other secondary coil with a resistance whereby the second mentioned secondary coil exerts a driving torque on said rotor in opposition to and of less value than the rotating influence of the short circuited secondary coil.

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US522685A 1943-01-05 1944-02-16 Retarded shaded pole motor Expired - Lifetime US2419396A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE246106X 1943-01-05

Publications (1)

Publication Number Publication Date
US2419396A true US2419396A (en) 1947-04-22

Family

ID=20306047

Family Applications (1)

Application Number Title Priority Date Filing Date
US522685A Expired - Lifetime US2419396A (en) 1943-01-05 1944-02-16 Retarded shaded pole motor

Country Status (2)

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US (1) US2419396A (de)
CH (1) CH246106A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2697187A (en) * 1951-10-13 1954-12-14 Westinghouse Electric Corp Induction type alternating-current relay
US2752539A (en) * 1952-03-05 1956-06-26 Westinghouse Electric Corp Induction-type alternating-current relays
US2795475A (en) * 1952-12-02 1957-06-11 Bendix Aviat Corp Condition recording apparatus

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2007240A (en) * 1934-02-01 1935-07-09 C A Dunham Co Remote control proportional movement motor
US2027846A (en) * 1934-02-15 1936-01-14 Gen Electric Reversible shaded pole motor
US2079497A (en) * 1934-02-15 1937-05-04 Automatic Temperature Control Co Inc Controlling system for regulators
US2109776A (en) * 1935-08-07 1938-03-01 Lewis Eng Co Means for indicating and/or recording unknown quantities
US2123182A (en) * 1934-03-23 1938-07-12 Howard D Colman Motor control
US2134685A (en) * 1933-01-19 1938-11-01 Crise Electric Mfg Company Method of operating shaded pole motors
GB522130A (en) * 1938-12-06 1940-06-10 Standard Telephones Cables Ltd Improvements in or relating to shaded pole induction disc type electric motors, relays or measuring instruments
US2247165A (en) * 1939-06-02 1941-06-24 George W Crise Indexing apparatus
US2334447A (en) * 1939-06-26 1943-11-16 Crise Electric Mfg Company Thermostatic control system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2134685A (en) * 1933-01-19 1938-11-01 Crise Electric Mfg Company Method of operating shaded pole motors
US2007240A (en) * 1934-02-01 1935-07-09 C A Dunham Co Remote control proportional movement motor
US2027846A (en) * 1934-02-15 1936-01-14 Gen Electric Reversible shaded pole motor
US2079497A (en) * 1934-02-15 1937-05-04 Automatic Temperature Control Co Inc Controlling system for regulators
US2123182A (en) * 1934-03-23 1938-07-12 Howard D Colman Motor control
US2109776A (en) * 1935-08-07 1938-03-01 Lewis Eng Co Means for indicating and/or recording unknown quantities
GB522130A (en) * 1938-12-06 1940-06-10 Standard Telephones Cables Ltd Improvements in or relating to shaded pole induction disc type electric motors, relays or measuring instruments
US2247165A (en) * 1939-06-02 1941-06-24 George W Crise Indexing apparatus
US2334447A (en) * 1939-06-26 1943-11-16 Crise Electric Mfg Company Thermostatic control system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2697187A (en) * 1951-10-13 1954-12-14 Westinghouse Electric Corp Induction type alternating-current relay
US2752539A (en) * 1952-03-05 1956-06-26 Westinghouse Electric Corp Induction-type alternating-current relays
US2795475A (en) * 1952-12-02 1957-06-11 Bendix Aviat Corp Condition recording apparatus

Also Published As

Publication number Publication date
CH246106A (de) 1946-12-15

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