EP0095494A1 - Element de detecteur de temperature ou de pression - Google Patents

Element de detecteur de temperature ou de pression

Info

Publication number
EP0095494A1
EP0095494A1 EP83900200A EP83900200A EP0095494A1 EP 0095494 A1 EP0095494 A1 EP 0095494A1 EP 83900200 A EP83900200 A EP 83900200A EP 83900200 A EP83900200 A EP 83900200A EP 0095494 A1 EP0095494 A1 EP 0095494A1
Authority
EP
European Patent Office
Prior art keywords
capillary tube
capsule
bellows device
sensing element
support plate
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Withdrawn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
EP83900200A
Other languages
German (de)
English (en)
Inventor
Charles Frederick Nelson
Alan Digory Sleeman
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.)
Ranco Controls Ltd
Original Assignee
Ranco Controls 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 Ranco Controls Ltd filed Critical Ranco Controls Ltd
Publication of EP0095494A1 publication Critical patent/EP0095494A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G12—INSTRUMENT DETAILS
    • G12B—CONSTRUCTIONAL DETAILS OF INSTRUMENTS, OR COMPARABLE DETAILS OF OTHER APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G12B1/00—Sensitive elements capable of producing movement or displacement for purposes not limited to measurement; Associated transmission mechanisms therefor
    • G12B1/04—Hollow bodies having parts which are deformable or displaceable under pressure, e.g. Bourdon tube, bellows
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K5/00—Measuring temperature based on the expansion or contraction of a material
    • G01K5/32—Measuring temperature based on the expansion or contraction of a material the material being a fluid contained in a hollow body having parts which are deformable or displaceable
    • 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
    • H01H35/32—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by bellows

Definitions

  • the resin bonded joint is preferably reinforced by a metal sleeve which surrounds the end of the capillary tube adjoining the capsule or bellows device and which is embedded at least partly in the resin of the joint.
  • the capsule or bellows device may have a rigid base member having a tubular portion which projects through the - aperture in the support plate and which is swaged to attach • the base member to the support plate , the said tubular portion being embedded in the resin joint.
  • the bellows device 1 is secured to the support plate 9 by swaging of the tubular portion 8, the diameter of the latter being slightly greater than that of the capillary tube 2.
  • the capillary tube passes through the tubular portion 8 of the base member 6 and abuts the portion of the diaphragm 4 surrounding the hole 7.
  • the capillary tube 2 is formed with a bend so that the end of the capillary tube which is joined to the bellows device 1 is perpendicular to the plane of the bellows device 1 and its support plate 9.
  • the capillary tube 2 is anchored to the support plate 9 by means of deformable lugs 10 formed integrally with the support plate 9.
  • the crimping operation forms a cold-weld and is followed by parting of the capillary tube 2 at the site of the crimp 20.
  • the closed end of the capillary tube 2 is then finally sealed by a cold-forging operation in which the end of the capillary tube 2 is inserted in a - die 21 and deformed by a punch 22 which acts axially on the closed end of the capillary tube 2, forming an enlarged sealed end 23 ( Figure 5(d)).
  • the resulting sealed end 23 would not necessarily have an enlarged diameter as shown.
  • An alternative method of closing and sealing the capillary tube 2 is illustrated in Figure 6, in which the cold-forging of the end of the capillary tube to form the enlarged end 23 is effected in a single operation.
  • the end of the open capillary tube 2 is " inserted in the charging manifold 18 through the seal 19, as ⁇ iHustrated ' in Figure 5 (a) and is held firmly in a clamp or jaws.
  • a punch 22 moves axially with respect to the end of the capiliary tube 2 and passes- through the charging manifold 18, through a further seal 24.
  • the punch 22 cold-forms the enlarged end 23 of the capillary tube 22 in the manifold 18, immediately after the charging operation, forming a finished end 23 similar to that illustrated in Figure 5(d).
  • the cold-forged sealed end 23 of the capillary tube 2 is stronger and less vulnerable to damage than the sealed capillary tube ends formed by the traditional method. Moreover, the joint between the capillary tube and the bellows device is stronger and more easily made than the traditional soldered joint.
  • capillary tube materials which may be bonded using the method of the present invention are stainless steel, copper, brass and copper plated mild steel. Aluminium is," however, preferred because of its relative cheapness and its greater flexibility, rendering the sensing element easier to install.
  • the capillary tube 2 in the temperature sensing element of the present invention is preferably pre- anodised, as stated previously.
  • the coating material may be applied either as a precoat to the capillary or may be applied as a coating after the assembly of the sensing element.
  • other environmentally compatible plating finishe may be applied to the other component parts of the sensing element according to the intended field of application.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

Un élément détecteur de température ou de pression du type ayant une capsule ou un soufflet expansible (1) connecté à un tube capillaire (2) à l'aide d'un joint hermétique est fabriqué en scellant le tube capillaire (2) qui peut être constitué en aluminium, en acier inoxydable, en laiton ou en cuivre sur le soufflet ou la capsule (1) avec un joint à base de résine synthétique (14). Le joint en résine sert également à connecter le tube capillaire (2) sur une plaque de support rigide (9).
EP83900200A 1981-12-08 1982-12-07 Element de detecteur de temperature ou de pression Withdrawn EP0095494A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB08136976A GB2112306A (en) 1981-12-08 1981-12-08 Temperature or pressure sensing element
GB8136976 1981-12-08

Publications (1)

Publication Number Publication Date
EP0095494A1 true EP0095494A1 (fr) 1983-12-07

Family

ID=10526447

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83900200A Withdrawn EP0095494A1 (fr) 1981-12-08 1982-12-07 Element de detecteur de temperature ou de pression

Country Status (6)

Country Link
EP (1) EP0095494A1 (fr)
JP (1) JPS58502065A (fr)
DE (1) DE3249267T1 (fr)
GB (1) GB2112306A (fr)
IT (1) IT8268432A0 (fr)
WO (1) WO1983002157A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4778105A (en) * 1984-01-27 1988-10-18 Ranco Incorporated Of Delaware Control device
IT245304Y1 (it) * 1998-03-12 2002-03-20 Ge Procond Elettronica Spa Termostato perfezionato
US20140091152A1 (en) * 2012-09-28 2014-04-03 Invensys Appliance Controls South America Temperature sensor using aluminum capillary

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2698766A (en) * 1951-11-19 1955-01-04 Cutler Hammer Inc Pressure responsive power elements
US3654578A (en) * 1970-05-12 1972-04-04 Gen Electric Condition responsive switch mechanism
GB1378256A (en) * 1972-06-27 1974-12-27 Springfield Instr Co Inc Barometer capsule and method of manufacture
GB2057686A (en) * 1979-08-29 1981-04-01 Univ Bath Thermal Actuators
FR2480938A3 (fr) * 1980-04-22 1981-10-23 Ranco Inc Composant detecteur de temperature

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8302157A1 *

Also Published As

Publication number Publication date
GB2112306A (en) 1983-07-20
WO1983002157A1 (fr) 1983-06-23
IT8268432A0 (it) 1982-12-07
DE3249267T1 (de) 1984-01-12
JPS58502065A (ja) 1983-12-01

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19830902

AK Designated contracting states

Designated state(s): FR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19850702

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SLEEMAN, ALAN DIGORY

Inventor name: NELSON, CHARLES, FREDERICK