GB2322482A - Wire connection method to a terminal - Google Patents
Wire connection method to a terminal Download PDFInfo
- Publication number
- GB2322482A GB2322482A GB9703603A GB9703603A GB2322482A GB 2322482 A GB2322482 A GB 2322482A GB 9703603 A GB9703603 A GB 9703603A GB 9703603 A GB9703603 A GB 9703603A GB 2322482 A GB2322482 A GB 2322482A
- Authority
- GB
- United Kingdom
- Prior art keywords
- aperture
- electrically conductive
- stud
- terminal
- diameter
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/50—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw
- H01R4/5083—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw using a wedge
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/50—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw
- H01R4/5075—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw having an uneven wire receiving surface to improve the contact
Landscapes
- Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
Abstract
A method of connecting an electrically conductive wire (18), preferably of a gauge, to a terminal (36) of the gauge comprises the steps of forming a plastics housing (12) for the gauge with an aperture (24) therein, the aperture having a predetermined minimum diameter (D); forming a stud (16) with a head (26), a threaded portion (28), and an intermediate portion (30) therebetween, from electrically conductive material, the threaded portion having a diameter which is less than the minimum diameter of the aperture and defining the terminal for the gauge, the intermediate portion having a diameter to make an interference fit in the aperture, and the head having a diameter which is greater than the minimum diameter of the aperture; positioning an end (22) of the electrically conductive wire at the aperture; passing the threaded portion of the stud through the aperture; and pushing the intermediate portion into the aperture until the head engages the housing to trap the end of the electrically conductive wire between the head and the housing. This removes the need for welding and the use of adhesive to electrically connect the wire to the terminal.
Description
WIRE CONNECTION METHOD TO A TERMINAL Technlcal Field
The present invention relates to a method of connecting an electrically conductive wire to a terminal, and in particular to a method of connecting an electrically conductive wire of a gauge to a terminal of the gauge.
Background of the Invention
In a bi-metal gauge, it is known to wind the resistance wire around the formed bi-metal to a set resistance. The end of the resistance wire is then stripped of electrical insulation and welded to the head of a threaded stud. The threaded stud is positioned to extend through a boss or aperture in the plastics housing of the gauge to form a terminal for the gauge. Because of the differing material masses, the weld between the end of the resistance wire and the head of the stud is not always reliable and the welding process can make the wire brittle. In order to strengthen the weld, adhesive (which is cured by ultra-violet light) may be applied to the weld. This is expensive, difficult to apply, and difficult to cure.
Summary of the Invention
It is an object of the present invention to overcome the above mentioned disadvantages.
A method of connecting an electrically conductive wire to a terminal in accordance with the present invention comprises the steps of forming a plastics housing with an aperture therein, the aperture having a predetermined minimum diameter; forming a stud with a head, a threaded portion, and an intermediate portion therebetween, from electrically conductive material, the threaded portion having a diameter which is less than the minimum diameter of the aperture and which defines the terminal, the
intermediate portion having a diameter to make an interference fit in the aperture, and the head having a diameter which is greater than the minimum diameter of the aperture; positioning an end of the electrically conductive wire at the aperture; passing the threaded portion of the stud through the aperture; and pushing the intermediate portion into the aperture until the head engages the housing to trap the end of the electrically conductive wire between the head and the housing.
The method of the present invention removes the need for welding. The electrically conductive wire therefore remains ductile and is less susceptible to breaking. The method of the present invention also removes the need for the application and curing of an adhesive.
The method of the present invention has particular application in connecting an electrically conductive wire of a gauge to a terminal of the gauge, the terminal being positioned in an aperture in a plastics housing for the gauge. In this case, the method of the present invention can be implemented with little or no change to the components of a known gauge.
Brief Description of the Drawings
The present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
Figure 1 is a perspective view of a bi-metal gauge which is partially assembled in accordance with the method of the present invention;
Figure 2 is a cross-sectional view of the stud, housing and resistance wire of the bi-metal gauge of Figure 1; and
Figure 3 is a cross-sectional view of the stud, housing and resistance wire as shown in Figure 2 with the stud fully inserted.
Description of the Preferred Embodlment Referring to the drawings, Figure 1 shows a plastics housing 12 of a bi-metal gauge 10 which is preferably formed by moulding. The housing 12 has an upstanding boss 14 through which a stud 16 extends and which is connected with a resistance wire 18. As shown in Figure 2, the resistance wire 18 is covered in electrically insulating material 20 which has been stripped from the end 22 of the wire. The boss 14 in the housing 12 is formed with a through aperture 24 which has a minimum diameter D. The stud 16 is formed by any suitable process from metallic material and includes a head 26, a threaded portion 28, and an intermediate portion 30 between the head and the threaded portion. The head 26 has a diameter which is greater than the minimum diameter D of the aperture 24 in the boss 14. The threaded portion 28 has a diameter which is less than the minimum diameter D of the aperture 24. The threaded portion 28 defines a terminal 36 for the bi-metal gauge 10. The intermediate portion 30, which preferably has a splined surface, is slightly tapered and has a maximum diameter which is greater than the minimum diameter D of the aperture 24 such that the intermediate portion makes an interference fit with the internal surface 32 of the aperture 24 when the stud 16 is pressed into the aperture.
In accordance with the method of the present invention, the threaded portion 28 of the stud 16 is passed through the aperture 24 in the boss 14 in the housing 12 until the intermediate portion 30 engages the internal surface 32 of the aperture. The intermediate portion 30 is partially pushed into the aperture 24. Part of the end 22 of the wire 18 is passed down between the splined portion 30 and the internal surface 32 of the aperture 24.
The stud 16 is then filly pressed into the aperture 24. Alternatively, part of the end 22 of the wire 18 is positioned in the aperture 24 before insertion of the stud 16, and the stud is then inserted and pushed into the aperture. In either case, a portion of the end 22 of the wire 18 becomes trapped between the head 26 of the stud 16 and the end 34 of the boss 14, and a portion of the end 22 of the wire 18 is preferably also trapped between the intermediate portion 30 of the stud 16 and the internal surface 32 of the aperture 24.
The method of the present invention provides an electrical connection between the resistance wire 18 of the bi-metal gauge 10 and the terminal 36 of the gauge without the need for welding or adhesive. Although the above described embodiment refers to a method of assembly for a bi-metal gauge, it will be appreciated that the method of the present invention can also be used for electrically connecting an electrically conductive wire of any type of gauge to a terminal of that gauge. Still further, the method of the present invention can be used for connecting an electrically conductive wire to a terminal used in other arrangements, besides gauges.
Claims (8)
1. A method of connecting an electrically conductive wire to a terminal comprising the steps of forming a plastics housing with an aperture therein, the aperture having a predetermined minimum diameter; forming a stud with a head, a threaded portion, and an intermediate portion therebetween, from electrically conductive material, the threaded portion having a diameter which is less than the minimum diameter of the aperture and which defines the terminal, the intermediate portion having a diameter to make an interference fit in the aperture, and the head having a diameter which is greater than the minimum diameter of the aperture; positioning an end of the electrically conductive wire at the aperture; passing the threaded portion of the stud through the aperture; and pushing the intermediate portion into the aperture until the head engages the housing to trap the end of the electrically conductive wire between the head and the housing.
2. A method as claimed in Claim 1, wherein the threaded portion of the stud is passed through the aperture before the end of the electrically conductive wire is positioned at the aperture.
3. A method as claimed in Claim 1 or Claim 2, wherein the end of the electrically conductive wire is also positioned in the aperture in the housing.
4. A method as claimed in any one of Claims 1 to 3, wherein the aperture is formed in an upstanding boss formed in the housing.
5. A method as claimed in any one of Claims 1 to 4, wherein the intermediate portion of the stud is formed with a splined surface.
6. A method as claimed in any one of Claims 1 to 5, wherein the intermediate portion of the stud is formed with a tapered surface having a diameter adjacent the head which is greater than the minimum diameter of the aperture.
7. A method substantially as herein described with reference to the accompanying drawings.
8. A gauge comprising an electrically conductive wire; a plastics housing; and a stud having a threaded portion defining a terminal; an electrical connection being made between the electrically conductive wire and the terminal using a method as claimed in any one of Claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9703603A GB2322482B (en) | 1997-02-21 | 1997-02-21 | Wire connection method to a terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9703603A GB2322482B (en) | 1997-02-21 | 1997-02-21 | Wire connection method to a terminal |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9703603D0 GB9703603D0 (en) | 1997-04-09 |
| GB2322482A true GB2322482A (en) | 1998-08-26 |
| GB2322482B GB2322482B (en) | 2001-05-30 |
Family
ID=10808058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9703603A Expired - Lifetime GB2322482B (en) | 1997-02-21 | 1997-02-21 | Wire connection method to a terminal |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2322482B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1981000328A1 (en) * | 1979-07-17 | 1981-02-05 | Ortofon Mfg As | A method of securing a thin,enamelled connecting wire to a tubular plug pin,and a plug for use in the carrying out of the method |
| EP0063023A1 (en) * | 1981-04-06 | 1982-10-20 | Akzona Incorporated | A dual in-line socket assembly |
-
1997
- 1997-02-21 GB GB9703603A patent/GB2322482B/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1981000328A1 (en) * | 1979-07-17 | 1981-02-05 | Ortofon Mfg As | A method of securing a thin,enamelled connecting wire to a tubular plug pin,and a plug for use in the carrying out of the method |
| EP0063023A1 (en) * | 1981-04-06 | 1982-10-20 | Akzona Incorporated | A dual in-line socket assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9703603D0 (en) | 1997-04-09 |
| GB2322482B (en) | 2001-05-30 |
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