EP0887825A2 - Thermischer Schnappschalter mit eingebautem Temperatursensor - Google Patents

Thermischer Schnappschalter mit eingebautem Temperatursensor Download PDF

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Publication number
EP0887825A2
EP0887825A2 EP98500111A EP98500111A EP0887825A2 EP 0887825 A2 EP0887825 A2 EP 0887825A2 EP 98500111 A EP98500111 A EP 98500111A EP 98500111 A EP98500111 A EP 98500111A EP 0887825 A2 EP0887825 A2 EP 0887825A2
Authority
EP
European Patent Office
Prior art keywords
strip
thermostat
probe
free end
spring
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.)
Withdrawn
Application number
EP98500111A
Other languages
English (en)
French (fr)
Other versions
EP0887825A3 (de
Inventor
Tomas c/o Agrupada SA Bastida Vildosola
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.)
Oficina de Investigacion Agrupada SA
Officina De Investigacion Agrupada SA
Original Assignee
Oficina de Investigacion Agrupada SA
Officina De Investigacion Agrupada SA
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 Oficina de Investigacion Agrupada SA, Officina De Investigacion Agrupada SA filed Critical Oficina de Investigacion Agrupada SA
Publication of EP0887825A2 publication Critical patent/EP0887825A2/de
Publication of EP0887825A3 publication Critical patent/EP0887825A3/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • H01H9/0066—Auxiliary contact devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/04—Bases; Housings; Mountings

Definitions

  • the present invention relates to a controllable thermostat, of the kind used in various home electrical appliances, particularly in electric irons, which thermostat has been devised and structured in order not only to perform its classic function as such a switching element for the circuit supplying the home electrical appliance resistor, but further to supply a signal indicating whether or not the temperature selected with the thermostat control knob and the actual temperature of the appliance match one another.
  • controllable thermostat which is generally of a mechanical kind, in which a bimetallic strip causes a moving contact to move away from a fixed contact, whereas a control allows the extent of deformation of the bimetallic strip to be controlled in order for the contact opening/closing operation to take place.
  • temperature sensors are known to warn the user whether or not the temperature of the home electrical appliance matches the thermostat selected temperature.
  • the auxiliary strip is fixed to the rest of the thermostat structure through the classic rivet which fixes the various thermostat elements, thereby substantially complicating mounting of the strip, for a further insulator is required between the probe and the moving contact spring.
  • a significant adjustment problem also ensues because the auxiliary strip and its contact sidepiece are fixed, and there is hence a very short run to be covered in approaching the moving strip, and great precision is therefore required in manufacturing and mounting these parts.
  • the controllable thermostat subject of the invention which is based on a temperature sensor of the mechanical kind, as that described above, fully solves the above-mentioned drawbacks.
  • the thermostat disclosed herein has one of its primary characteristics in that one of the three classic spacers, specifically the upper spacer, is provided with a slot or socket in which the ancillary strip standing as the temperature probe may be coupled, by simply plugging it sideways, said probe strip being therefore easy to mount and dismount on and off the basic fully finished thermostat structure.
  • the insulating shaft through which the control knob acts on the moving control instead of simply crossing the probe strip, without acting on it, has an intermediate ledge through which it acts on said probe strip, and therefore upon the control knob being driven, it in turn acts both on the main moving strip and on the probe strip.
  • the contact between the probe strip and the moving strip, to close the signalling circuit is provided through the free end of said probe strip and preferably with the assistance of the screw, not only acting as an electrical contact but moreover allowing its own position to be adjusted to functionally control the probe.
  • This screw must obviously be out of step with respect to the insulator connecting the bimetallic strip and the moving contact, in order to avoid the latter impinging on the projecting sector of the insulator, cancelling out its operativeness.
  • Figure 1 Is a side elevation view of a brusque rupture controllable thermostat with a built-in temperature sensor, made in accordance with the object of the present invention, in which the probe strip end contact materialises as a screw.
  • Figure 2.- Is a plan view of the thermostat of figure 1.
  • Figure 3.- Is a side elevation view of a brusque rupture controllable thermostat with a built-in temperature sensor, made in accordance with the object of the present invention, in which the probe strip end incorporates a fold which enables the distance between the probe strip end and the spring end to be adjusted.
  • Figure 4.- Is a perspective of the spacing insulator with a probe strip in accordance with the present invention.
  • the thermostat subject hereof as any conventional bimetallic thermostat of this kind, is shown to consist of an input terminal (1) electrically connected to the moving contact (2) through a spring (3) and the taught plate (4) of a second spring (5) welded to the aforesaid spring (3) through its free end (6), whereas a second output terminal (7) towards an end (8) of the heating resistor (9), is electrically connected to the fixed contact (10), complementing the aforesaid contact (2), a bimetallic strip (11) lying at a lower level which may be deformed depending on the temperature and is able to mobilise the free end (6) of the spring (3) through an insulator (12), said bimetallic strip (11) and the terminals (1) and (7) and the classic upper bridge (13) being spaced by spacers (14) and fixed by means of a tubular rivet (15), the upper bridge (13) having a screwed controller (16) with the corresponding outer control knob (17), its insulating shaft (18) acting on the spring (3) and simultaneously on the probe strip (21).
  • one of the aforesaid spacing insulators (14), specifically the upper insulator designated (19), incorporates a side slot or socket (20) through which it may be coupled with a probe strip (21) with its corresponding connection terminal (22) and free end (23) of which coincides at one side of the spring end (6) and out of the vertical of the spacer (12), as was mentioned above and is shown specifically in figure 2, said end (23) incorporating a contact (24) which, in the practical embodiment shown in the figures, consists of a screw driven into the strip, which may travel axially with respect thereto and which, consequently, allows its function as a heat probe to be adjusted. Nevertheless, this adjustment can be made on the end of the probe strip (21), suitably folding it so as to lie at a suitable distance from the spring end (6).
  • the insulating shaft (18) associated to the controller (16) has a recessed bottom area so that the same defines a ledge (25) through which it acts on the probe strip (21), whereas through its free end it acts on the spring (3).
  • the screw or contact (24) is normally kept spaced from the spring end (6), in which position a signalling pilot light (26), preferably green in colour, will be switched on, whereas a second signalling pilot light (27), red in colour, will be switched off, for due to an auxiliary resistor (28), as shown in figure 3, the current passing through the pilot light (27) is not sufficient to light it.
  • the probe strip (21) moves downward and upon contacting the spring end (6) is tensioned and the red pilot light (27) is lighted, just as the green pilot light (26) is turned off, warning that the temperature of the appliance is excessive for the selected position of the control knob (17).
  • the spring end (6) will be gradually lowered due to the deformation of the bimetallic strip (11) until the probe strip (21) is separated, advising that the temperature is suitable through the green pilot light (26), which shall have been switched on just as the red pilot light (27) is switched off.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Thermally Actuated Switches (AREA)
EP98500111A 1997-05-26 1998-05-07 Thermischer Schnappschalter mit eingebautem Temperatursensor Withdrawn EP0887825A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES9701451U 1997-05-26
ES9701451U ES1037374Y (es) 1997-05-26 1997-05-26 Termostato regulable de ruptura brusca con detector de temperatura incorporado.

Publications (2)

Publication Number Publication Date
EP0887825A2 true EP0887825A2 (de) 1998-12-30
EP0887825A3 EP0887825A3 (de) 1999-08-11

Family

ID=8299897

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98500111A Withdrawn EP0887825A3 (de) 1997-05-26 1998-05-07 Thermischer Schnappschalter mit eingebautem Temperatursensor

Country Status (2)

Country Link
EP (1) EP0887825A3 (de)
ES (1) ES1037374Y (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10016141C1 (de) * 2000-03-31 2001-08-23 Thermostat & Schaltgeraetebau Thermisch gesteuerte elektrische Schaltvorrichtung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4261120A (en) * 1978-06-20 1981-04-14 Scovill Inc. Electric pressing iron having indicating ready light with improved switch means
US5337037A (en) * 1992-09-10 1994-08-09 Moulinex (Societe Anonyme) Device for controlling at least two luminous condition indicating signals
EP0677860A2 (de) * 1994-04-12 1995-10-18 Moulinex S.A. Thermostat zur Steuerung der Schaltungsanordnung zur Stromversorgung des Heizelementes eines gerätes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4261120A (en) * 1978-06-20 1981-04-14 Scovill Inc. Electric pressing iron having indicating ready light with improved switch means
US5337037A (en) * 1992-09-10 1994-08-09 Moulinex (Societe Anonyme) Device for controlling at least two luminous condition indicating signals
EP0677860A2 (de) * 1994-04-12 1995-10-18 Moulinex S.A. Thermostat zur Steuerung der Schaltungsanordnung zur Stromversorgung des Heizelementes eines gerätes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10016141C1 (de) * 2000-03-31 2001-08-23 Thermostat & Schaltgeraetebau Thermisch gesteuerte elektrische Schaltvorrichtung
EP1139369A2 (de) * 2000-03-31 2001-10-04 Thermostat- und Schaltgerätebau GmbH & Co. KG Thermisch gesteuerte elektrische Schaltvorrichtung
EP1139369A3 (de) * 2000-03-31 2003-05-02 Thermostat- und Schaltgerätebau GmbH & Co. KG Thermisch gesteuerte elektrische Schaltvorrichtung

Also Published As

Publication number Publication date
ES1037374Y (es) 1998-07-01
EP0887825A3 (de) 1999-08-11
ES1037374U (es) 1998-02-16

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