GB1406428A - Electrically energised apparatus for heating liquids - Google Patents

Electrically energised apparatus for heating liquids

Info

Publication number
GB1406428A
GB1406428A GB4934371A GB4934371A GB1406428A GB 1406428 A GB1406428 A GB 1406428A GB 4934371 A GB4934371 A GB 4934371A GB 4934371 A GB4934371 A GB 4934371A GB 1406428 A GB1406428 A GB 1406428A
Authority
GB
United Kingdom
Prior art keywords
heater
switch
detector
liquid
arm
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
GB4934371A
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.)
Creda Electric Ltd
Original Assignee
Creda Electric 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 Creda Electric Ltd filed Critical Creda Electric Ltd
Priority to GB4934371A priority Critical patent/GB1406428A/en
Publication of GB1406428A publication Critical patent/GB1406428A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/21—Water-boiling vessels, e.g. kettles
    • A47J27/21008—Water-boiling vessels, e.g. kettles electrically heated
    • A47J27/21058—Control devices to avoid overheating, i.e. "dry" boiling, or to detect boiling of the water
    • A47J27/2115—Control devices to avoid overheating, i.e. "dry" boiling, or to detect boiling of the water using a float
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • A47J31/44—Parts or details or accessories of beverage-making apparatus
    • A47J31/54—Water boiling vessels in beverage making machines
    • A47J31/56—Water boiling vessels in beverage making machines having water-level controls; having temperature controls
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/18—Switches operated by change of liquid level or of liquid density, e.g. float switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/20—Interlocking, locking, or latching mechanisms

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Cookers (AREA)

Abstract

1406428 Mechanical switches; latching and unlatching switches; thermal switches CREDA ELECTRIC Ltd 20 Oct 1972 [23 Oct 1971] 49343/71 Heading H1N An electric immersion heater 6 in a liquid heater 1 is controlled by a switch 7 normally biased open but capable of being latched to the closed position by a latch element 15 (a rod), switch 7 being released by a detector 19 when the liquid boils, detector 19 being submerged in the liquid in use. To close switch 7, pushbutton 12 is depressed which through tail 13 pushes plate 14 which pivots lever 9 about axis 11 which pushes spring arm 10 attached to switch 7 to depress button 8 to close switch 7. If the liquid is not boiling, detector 19 (a plate with flanges round the edge) falls under the action of gravity and pivots rod 15 about axis 18 to slide it along the arm of slot 16 in lever 9 away from axis 11 to latch lever 9 and switch 7 closed. When the liquid boils, the turbulence over heater 6 lifts detector 19 which pivots rod 15 back towards axis 11 so that it enters the arm of slot 16 at right angles to the longitudinal axis of lever 9 and releases lever 9 which is urged back to its original position by spring arm 10 releasing switch 7 to open its contacts. If it is desired to release switch 7 before the liquid boils, pushbutton 23 may be depressed which moves arm 24 to urge rod 15 towards axis 11 and into the arm shown in Fig. 2 of slot 16 to release lever 9 and hence switch 7. A safety device is provided which prevents setting of the latch and/or releases the latch if there is insufficient liquid in heater 1. This takes the form of a float 20 on an arm 21 having an angled portion 22 which engages under detector 19, as shown in Fig. 1, to prevent detector 19 falling or to raise detector 19 if it has already fallen. Alternatively instead of float 20, there may be a bimetal attached to heater 6, the other end of the bimetal co-operating with rod 15, or a spring member restrained by a low melting- point alloy fusible element. Also heater 6 may be mounted beneath the bottom 3 of heater 1. The liquid enters heater 1 through pipe 5. Heater 1 may be a domestic sink water heater, or a tea-urn, or electric kettle, &c.
GB4934371A 1971-10-23 1971-10-23 Electrically energised apparatus for heating liquids Expired GB1406428A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4934371A GB1406428A (en) 1971-10-23 1971-10-23 Electrically energised apparatus for heating liquids

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4934371A GB1406428A (en) 1971-10-23 1971-10-23 Electrically energised apparatus for heating liquids

Publications (1)

Publication Number Publication Date
GB1406428A true GB1406428A (en) 1975-09-17

Family

ID=10452046

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4934371A Expired GB1406428A (en) 1971-10-23 1971-10-23 Electrically energised apparatus for heating liquids

Country Status (1)

Country Link
GB (1) GB1406428A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2497978A (en) * 2011-12-23 2013-07-03 Otter Controls Ltd Liquid heating vessel and control

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2497978A (en) * 2011-12-23 2013-07-03 Otter Controls Ltd Liquid heating vessel and control

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Legal Events

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