EP0908910A1 - Ein wärmebetätigter Schalter mit einer kalibrierenden Mutter - Google Patents

Ein wärmebetätigter Schalter mit einer kalibrierenden Mutter Download PDF

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Publication number
EP0908910A1
EP0908910A1 EP98500213A EP98500213A EP0908910A1 EP 0908910 A1 EP0908910 A1 EP 0908910A1 EP 98500213 A EP98500213 A EP 98500213A EP 98500213 A EP98500213 A EP 98500213A EP 0908910 A1 EP0908910 A1 EP 0908910A1
Authority
EP
European Patent Office
Prior art keywords
nut
calibration
base body
spindle
switching device
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.)
Granted
Application number
EP98500213A
Other languages
English (en)
French (fr)
Other versions
EP0908910B1 (de
Inventor
Ramon Azpeitia De Diego
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.)
Fagor Electrodomesticos SCL
Original Assignee
Fagor Electrodomesticos SCL
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 Fagor Electrodomesticos SCL filed Critical Fagor Electrodomesticos SCL
Publication of EP0908910A1 publication Critical patent/EP0908910A1/de
Application granted granted Critical
Publication of EP0908910B1 publication Critical patent/EP0908910B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/26—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/26—Details
    • H01H35/2607—Means for adjustment of "ON" or "OFF" operating pressure
    • H01H35/2635—Means for adjustment of "ON" or "OFF" operating pressure by adjustment of a motion transmitting system

Definitions

  • the present invention relates to a thermally actuated switching device, comprising a base body, an electric switch, a setting spindle, a heat responsive diaphragm, and means for adjustment the switching threshold temperature, according to the preamble of claim 1.
  • the switching device described in EP-0 377 169 has a setting spindle for adjusting the desired switching temperature, via the diaphragm which moves an actuating lever arm further away from or closer to the switching position of the electric contacts, and a calibration nut, threaded on the spindle and inserted in the base body, the nut has a circumferential collar, in order to be clamped against the base body, by means of a clamping bracket which is fastened to the base body by screws.
  • the clamping force is so strong that the nut rotates with friction with respect to the base body, when it is turned with the aid of a tool, in order the setting spindle to be axially displaced during the calibration step, whereas it prevents the nut for being moved by the normal turning of the setting spindle when the device is in use.
  • the calibration step for advancing the setting spindle, it is gripped in order to prevent its rotation.
  • the calibration nut according to EP-A-0 377 169 requires a large number of components and steps to be assembled into the base body.
  • the thermally actuated electric switch has a setting spindle or screw threaded in an insert which is a riveted nut, but it is not a calibration nut because it does not rotate, it only serves to guide the advance of the screw.
  • the object of the present invention is a thermally actuated switching device as is defined in claim 1.
  • the calibration nut can be held to the base body in a simple manner by riveting in a bore in the base body. It is a very reliable and simple technique, allowing a good control of the clamping force with which the calibration nut clamps in the edge of the bore in a suitable manner, and there is no need of mounting fits others than the calibration nut itself.
  • a washer is interposed between the deformable sections and the base body by suitably selecting the dimensions and the material of this washer, the clamping force with which the riveted nut is clamped to the base body can be controlled, to achieve the reproductivity. In this way, therefore, the amount of force which is required to rotate the riveted nut during calibration is controlled. Furthermore, the presence of the washer makes it possible to take up any axial loads which may arise.
  • the device 1 comprises the base body 2 and the actuating arm 3 provided with a hinge axis 4 and a bent section 5, the diaphragm 6 which is connected to a hollow sensor 8 via a capillary line 7, and the setting spindle 9 provided with an intermediate thread 9b interacting with a corresponding thread in the calibration nut 15 which is mounted on the base body 2.
  • the numeral 10 indicates the switch contacts. The temperature threshold value at which the switch 10 is opened and closed can be adjusted with the aid of the setting spindle 9.
  • the correct angular position of the setting spindle relative to the temperature indexing can be calibrated by placing the sensor 8 in a space with the set known temperature and then rotating the calibration nut 15 up to meet the switching on-off. During the rotation of the calibration nut 15, the setting spindle is gripped against rotation, keeping its flat surface 9a, in the same predetermined angular position as shown in Fig. 1. After calibration, a drop of sealing wax indicates that calibration has taken place.
  • the calibration nut 15 is riveted in such a way that it can be rotated only by means of a tool.
  • the riveted nut 15 is arranged in a bore 16 in the base body 2.
  • the riveted nut 15 has a shoulder 17 which bears against the base body 2, and a riveting rim 18 which is riveted to the opposite side of the base body 2.
  • the washer 20, made of material deformable, is accommodated in the riveted connection.
  • the riveted rim 18 is provided with one slot, in which the special tool for calibration is engaged.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Insertion Pins And Rivets (AREA)
  • Thermally Actuated Switches (AREA)
EP19980500213 1997-10-08 1998-10-02 Ein wärmebetätigter Schalter, mit einer kalibrierenden Mutter Expired - Lifetime EP0908910B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1007227A NL1007227C2 (nl) 1997-10-08 1997-10-08 Schakelinrichting, in het bijzonder een thermische schakelinrichting, met klinkmoer.
NL1007227 1997-10-08

Publications (2)

Publication Number Publication Date
EP0908910A1 true EP0908910A1 (de) 1999-04-14
EP0908910B1 EP0908910B1 (de) 2000-08-23

Family

ID=19765804

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980500213 Expired - Lifetime EP0908910B1 (de) 1997-10-08 1998-10-02 Ein wärmebetätigter Schalter, mit einer kalibrierenden Mutter

Country Status (4)

Country Link
EP (1) EP0908910B1 (de)
DE (1) DE69800269T2 (de)
ES (1) ES2150812T3 (de)
NL (1) NL1007227C2 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1148904A (en) * 1965-09-02 1969-04-16 Kenlowe Accessories And Compan Improved thermostatically operated electric switch
US3899765A (en) * 1974-07-31 1975-08-12 Texas Instruments Inc Thermally actuated switch
EP0377169A2 (de) * 1988-12-31 1990-07-11 E.G.O. Elektro-Geräte Blanc und Fischer GmbH & Co. KG Schaltgerät

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1148904A (en) * 1965-09-02 1969-04-16 Kenlowe Accessories And Compan Improved thermostatically operated electric switch
US3899765A (en) * 1974-07-31 1975-08-12 Texas Instruments Inc Thermally actuated switch
EP0377169A2 (de) * 1988-12-31 1990-07-11 E.G.O. Elektro-Geräte Blanc und Fischer GmbH & Co. KG Schaltgerät

Also Published As

Publication number Publication date
NL1007227C2 (nl) 1999-05-04
ES2150812T3 (es) 2000-12-01
EP0908910B1 (de) 2000-08-23
NL1007227A1 (nl) 1999-04-15
DE69800269D1 (de) 2000-09-28
DE69800269T2 (de) 2001-03-15

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