GB2172828A - Process for fixing a tube with respect to a base, and apparatus constructed according to this process - Google Patents
Process for fixing a tube with respect to a base, and apparatus constructed according to this process Download PDFInfo
- Publication number
- GB2172828A GB2172828A GB08604375A GB8604375A GB2172828A GB 2172828 A GB2172828 A GB 2172828A GB 08604375 A GB08604375 A GB 08604375A GB 8604375 A GB8604375 A GB 8604375A GB 2172828 A GB2172828 A GB 2172828A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- base
- depressions
- thermostat
- respect
- 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
Links
- 238000000034 method Methods 0.000 title claims description 12
- 210000002105 tongue Anatomy 0.000 claims abstract description 14
- 238000007654 immersion Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229910000863 Ferronickel Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- H01H37/46—Thermally-sensitive members actuated due to expansion or contraction of a solid
- H01H37/48—Thermally-sensitive members actuated due to expansion or contraction of a solid with extensible rigid rods or tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/06—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes in openings, e.g. rolling-in
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B17/00—Connecting constructional elements or machine parts by a part of or on one member entering a hole in the other and involving plastic deformation
- F16B17/006—Connecting constructional elements or machine parts by a part of or on one member entering a hole in the other and involving plastic deformation of rods or tubes to sheets or plates
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The immersion tube (5) of a thermostat engages in a hole (2) in its base (1), abutting against a shoulder (2c) thereof. Depressions (3, 4) are made in the base (1) so that the hole (2) comprises a notch formed by said depressions (3, 4). Two tongues (5a, 5b) are cut out in the end of the tube (5) and folded down against the bottom (3a, 4a) of the depressions (3, 4). In this way, the tube (5) is immobilized axially and angularly. <IMAGE>
Description
SPECIFICATION
Process for fixing a tube with respect to a base and apparatus constructed according to this process
The present invention relates to a process for fixing a tube with respect to a base and more especially to the fixing of the immersion tube of a thermostat, as it is in that domain that the application of the process according to the invention is of greatest interest.
Thermostats incorporating an immersion tube are known to comprise a base supporting said tube and the other members of the apparatus, this base being most often made of an appropriate plastics material so as to be insulating; a polyester compound is advantageously used to that end.
It will be briefly recalled that, in an immersion tube thermostat, a tube is fastened to the base and contains a non-dilatable rod whose end is assembled on the free end of the tube. Such assembly may be effected for example by means of a weld.
When the temperature varies, it is the tube which expands or contracts, with the result that the variation in length thereof with respect to the base causes the non-dilatable rod to be displaced, its free end actuating the thermostat. It will be readily understood that the tube must be assembled on the base without clearance and that such assembly must remain without defect in time.
It is an object of the improvements according to the present invention to produce such an assembly which ensures on the one hand an axial connection of the tube with respect to the base and in addition an angular immobilization with respect thereto.
To this end, the process according to the invention consists:
I in engaging one end of the tube in a perfora- tion in the base presenting a diameter equal, to within the clearance, to that of the tube, said end coming into abutment against a stop made in the base;
I in cutting out two longitudinal tongues in the end of the tube located inside the base;
I and in folding these two tongues down into two grooves in the base in order on the one hand to fasten the tube longitudinally with respect to the base and on the other hand to prevent any relative rotation between the two elements in question.
The two tongues are advantageously disposed in diametrically opposite manner, so that at least one of them constitutes a sole to support the plate ensuring articulation of the blade controlling the thermostat, so that said plate cannot penetrate in the plastics material constituting the base.
The invention will be more readily understood on reading the following description with reference to the accompanying drawings, in which:
Figure 1 is an exploded partial view in perspective of part of the base of a thermostat and its immersion tube.
Figure 2 is a view similar to that of Figure 1, but showing the tube assembled on the base in accordance with the process according to the invention.
Figure 3 is a transverse section through a thermostat to which the improvement according to the invention are applied.
Figure 4 is a section thereof along IV-IV (Figure 3).
Referring now to the drawings, Figure 1 illustrates a base 1 advantageously made of a plastics material such as a polyester compound in which is formed a bore 2 in the form of two successive holes 2a, 2b of which the first presents a diameter clearly larger than that of hole 2b which follows it.
The bore 2 therefore comprises a shoulder 2c. The hole 2a of large diameter has two blind depressions 3 and 4 cut out therein which are advantageously oriented one opposite the other so as to constitute only one notch traversing said hole.
However, it will be readily appreciated that the two blind depressions 3 and 4 may determine therebetween an angle different from a plan angle. Each depression comprises a bottom 3a, 4a, these two bottoms being at the same level.
The problem to be solved is that of fixing a tube 5 axially and in rotation with respect to the base 1.
The tube 5 constitutes one of the elements of an immersion associated with a thermostat and which coaxially contains a rod 6 made of a non-dilatable material such as a ferro-nickel with 36- of nickel.
The corresponding free ends of the tube and of the rod are fixed to each other in conventional manner for example by welding, so that, when the tube 5 is immersed in an atmosphere subject to temperature variations, it expands, whilst the rod 6 conserves its original length. Tube 5 presents an outer diameter equal, to within the clearance, to that of hole 2a so that the tube can be engaged in this hole until its end abuts against shoulder 2c.
The process according to the invention consists in cutting in tube 5 two tongues 5a, 5b whose orientation corresponds to that of the depressions 3 and 4, the height of these tongues being such that their attachment to the remaining part of the tube lies at the level of the bottoms 3a, 3b of the depressions 3 and 4 or slightly below.
As illustrated in Figure 2, the two tongues Sa, Sb are folded down through 90 so that they are applied against the bottoms 3a, 4a. In this way, the two tongues maintain the end of the tube firmly applied against the shoulder 2c of the hole 2 so as to fix the tube axially with respect to the base. Furthermore, the width of the tongues 5a, 56 is chosen to be equal to that of the bottoms 3a, 4a of depressions 3 and 4, with the result that their edges abut against the vertical faces of said depressions with a view to avoiding any relative rotation between tube 5 and base 1.
It will be noted on passing that rod 6 passes freely through small-diameter hole 2b of bore 2 to come into cooperation with a rigid blade 7 of which one of the ends is mounted to tilt with respect to a vertical plate 8 engaged in a vertical slot 9 oriented perpendicularly to the depression 3. An adjusting nut 10 conventionally abuts on the end of the rod 6 and is screwed in the blade 7.
As illustrated in Figure 4, the plate 8 rests by the recessed part 8a of its base against the tongue 5a which is in abutment against the bottom 3a of the depression 3. In this way, the base of the plate 8 is maintained perfectly on a metal piece, with the result that it does not risk penetrating in the plastics material, causing misadjustment of the thermostat.
It must, moreover, be understood that the foregoing description has been given only by way of example and that it in no way limits the domain of the invention which would not be exceeded by replacing the details of execution described by any other equivalents.
Claims (6)
1. A process for fixing a tube with respect to a base, wherein it consists: in engaging one end of the tube in a perforation in the base presenting a diameter equal, to within the clearances, to that of the tube, said end coming into abutment against a stop;
in cutting out two longitudinal tongues in the end of the tube located inside the base; t and in folding these two tongues down against the bottom of two depressions in the base in order on the one hand to fasten the tube longitudinally with respect to the base and on the other hand to prevent any relative rotation between the two elements in question.
2. A process as claimed in Claim 1, wherein the tongue are cut out and folded down simultaneously.
3. A thermostat incorporating an immersion tube, wherein said tube is fixed to its base by carrying out the process as claimed in either one of
Claims 1 and 2.
4. A thermostat as claimed in Claim 3, wherein its base is provided with a bore comprising two successive holes with two different diameters, one being adapted to receive the tube of the immersion, and the other to allow passage of the non-dilatable rod so that the shoulder of said bore constitutes a stop for the tube, and the hole has two blind depressions cut out therein.
5. A thermostat as claimed in Claim 4, wherein the two depressions are arranged so as to constitute a notch traversing the hole.
6. A thermostat as claimed in Claim 5, wherein the bottom of one of the depressions lies below the point of articulation of the blade actuated by the rod so that the plate ensuring this articulation rests on the tongue folded down against this bottom.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8503393A FR2578596A1 (en) | 1985-03-05 | 1985-03-05 | METHOD OF FIXING A TUBE IN RELATION TO A BASE, AND APPARATUS ESTABLISHED IN ACCORDANCE WITH THIS METHOD |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8604375D0 GB8604375D0 (en) | 1986-03-26 |
| GB2172828A true GB2172828A (en) | 1986-10-01 |
| GB2172828B GB2172828B (en) | 1987-11-04 |
Family
ID=9316981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08604375A Expired GB2172828B (en) | 1985-03-05 | 1986-02-21 | Process for fixing a tube with respect to a base, and apparatus constructed according to this process |
Country Status (3)
| Country | Link |
|---|---|
| FR (1) | FR2578596A1 (en) |
| GB (1) | GB2172828B (en) |
| IT (1) | IT1191866B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0279368A3 (en) * | 1987-02-19 | 1989-11-15 | E.G.O. Elektro-Gerate Blanc U. Fischer | Temperature limiter |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3776523A (en) * | 1972-04-27 | 1973-12-04 | Universal Fence Inc | Structural tube assembly |
| US3768845A (en) * | 1972-05-04 | 1973-10-30 | Memphis Furniture Mfg Co | Drawer pull anchoring device |
| SE419806B (en) * | 1973-08-30 | 1981-08-24 | Ego Elektro Blanc & Fischer | ELECTRICAL SWITCH |
| FR2326608A1 (en) * | 1975-09-30 | 1977-04-29 | Halais Sa Georges | Tubular component assembly system - has taper plug which fits into split end and is driven in drilled hole |
-
1985
- 1985-03-05 FR FR8503393A patent/FR2578596A1/en active Pending
-
1986
- 1986-02-21 GB GB08604375A patent/GB2172828B/en not_active Expired
- 1986-02-26 IT IT47695/86A patent/IT1191866B/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0279368A3 (en) * | 1987-02-19 | 1989-11-15 | E.G.O. Elektro-Gerate Blanc U. Fischer | Temperature limiter |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8604375D0 (en) | 1986-03-26 |
| IT8647695A0 (en) | 1986-02-26 |
| GB2172828B (en) | 1987-11-04 |
| IT1191866B (en) | 1988-03-23 |
| FR2578596A1 (en) | 1986-09-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19990221 |