GB1351755A - Washing and wringing machines - Google Patents

Washing and wringing machines

Info

Publication number
GB1351755A
GB1351755A GB3340970A GB1351755DA GB1351755A GB 1351755 A GB1351755 A GB 1351755A GB 3340970 A GB3340970 A GB 3340970A GB 1351755D A GB1351755D A GB 1351755DA GB 1351755 A GB1351755 A GB 1351755A
Authority
GB
United Kingdom
Prior art keywords
switch
contacts
winding
normally
motor
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
Application number
GB3340970A
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.)
Hoover Ltd
Original Assignee
Hoover Ltd
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 Hoover Ltd filed Critical Hoover Ltd
Publication of GB1351755A publication Critical patent/GB1351755A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/14—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for operation by a part of the human body other than the hand, e.g. by foot
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
    • H02P23/24—Controlling the direction, e.g. clockwise or counterclockwise
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
    • H01H2300/026—Application dead man switch: power must be interrupted on release of operating member

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Centrifugal Separators (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

1351755 Control of A.C. motors HOOVER Ltd 8 July 1971 [9 July 1970] 33409/70 Heading H2J [Also in Division H1] A washing and wringing machine, such as that described in Specification 778,169, is provided with the motor control circuit shown in which the main winding 11 of the split-phase induction driving motor is connected across the changeover contacts 19, 20 of a reversing switch 16 having wash contacts 17, 21 and wring contacts 18, 22, the last four contacts being interconnected with the motor start winding 10, a normally-closed two-way direction-responsive centrifugal switch 14 and the normally-open contacts 24, 25 of a dead man switch 23 which also includes a change-over switch having a change-over contact 26, a normally-open contact 27 and a normally-closed contact 28. The arrangement is such that with the switch 16 in the wash position the winding 11 will be energized from the supply 33 whether the switch 23 is actuated or not and the winding 10 will be actuated normally in one direction under the control of switch 14, and with the switch 16 in the wring position the winding 11 is energized only when switch 23 is operated to close contacts 26, 27, such operation also allowing energization of the winding 10 through contacts 18, 20; 25; 24; 19, 22. The switch 14 enables the start winding 10 to be connected so as to produce a braking torque while the motor is running at full speed. A three way switch 36 provides for energization of the motor or a heater 37 or for de-energization of both. The dead man switch 23 is mounted near the bottom of the front wall of the machine and is operated by a foot-controlled pedal coupled to a spring- urged toggle, Figs. 2, 3 and 4 (not shown), the arrangement being such that considerable force is required to initially depress the pedal but little force is required to hold it in the operated position. This feature plus the height of the pedal from the ground makes difficult the actuation of the pedal by a child and so protects against undesired operation. The dead man contact 26 is arranged to change over before either of the contacts 24, 25 closes.
GB3340970A 1970-07-09 1970-07-09 Washing and wringing machines Expired GB1351755A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3340970 1970-07-09

Publications (1)

Publication Number Publication Date
GB1351755A true GB1351755A (en) 1974-05-01

Family

ID=10352580

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3340970A Expired GB1351755A (en) 1970-07-09 1970-07-09 Washing and wringing machines

Country Status (1)

Country Link
GB (1) GB1351755A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2272484A (en) * 1992-10-16 1994-05-18 Dewhurst Plc Method and apparatus of operating powered devices, for example, automatic doors
EP1460666A2 (en) * 2003-03-19 2004-09-22 Siemens Aktiengesellschaft Key for security related switching processes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2272484A (en) * 1992-10-16 1994-05-18 Dewhurst Plc Method and apparatus of operating powered devices, for example, automatic doors
EP1460666A2 (en) * 2003-03-19 2004-09-22 Siemens Aktiengesellschaft Key for security related switching processes
EP1460666A3 (en) * 2003-03-19 2005-09-28 Siemens Aktiengesellschaft Key for security related switching processes

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee