WO1997003784A2 - Component assembly - Google Patents
Component assembly Download PDFInfo
- Publication number
- WO1997003784A2 WO1997003784A2 PCT/GB1996/001749 GB9601749W WO9703784A2 WO 1997003784 A2 WO1997003784 A2 WO 1997003784A2 GB 9601749 W GB9601749 W GB 9601749W WO 9703784 A2 WO9703784 A2 WO 9703784A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- components
- contact
- assembly
- electrical
- firεt
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices therefor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/01—Mounting; Supporting
- H01C1/014—Mounting; Supporting the resistor being suspended between and being supported by two supporting sections
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
- B23K2101/40—Semiconductor devices
Definitions
- This invention relates to an assembly of interconnected electrical components, and more particularly but not solely, to an assembly of disc thermistors of different thicknesses. It is often necessary to interconnect components, such as disc thermistors, in a particular configuration, and a known way of achieving this is to initially "dry” assemble and clamp the components within a lead frame, relying on the clamping pressure and also friction between the components to retain them in their desired positions. Interconnection is completed by applying solder (or dipping the arrangement in solder) such that the components become bonded to the frame and to each other.
- components such as disc thermistors are often of different thicknesses. This becomes a problem when three such thermistors are to be assembled with two thermistors positioned side-by-side and the third positioned to bridge across the tops of those two thermistors.
- the thermistors are "dry" assembled within the frame, the upper thermistor is only in contact with each of other thermistors over a relatively small surface area and the friction between them is weak, such that the thermistors may become displaced during subsequent handling and before application of the solder.
- an assembly of electrical components comprising a first contact formed with two fulcrums on which respective first and second electrical components rest side-by-side, a third electrical component positioned on the fir ⁇ t and second electrical components, and a second contact having a fulcrum engaged with the third electrical component, the two contacts pressing the third electrical component into face-to-face contact with each of the first and second electrical component ⁇ .
- the three components pivot about their respective fulcrums, in response to the pressure applied by the two contacts, to adopt an orientation in which their mutually contacting surfaces are coplanar. the components are thus held firmly in position.
- the first contact may be formed with two transverse ribs which provide its two fulcrums.
- the second contact may be formed with an end portion having a transverse edge lying parallel to and between these two ribs.
- a method of forming an a ⁇ sembly of components comprising positioning first and second components side-by-side on respective fulcrums which are formed on a first contact, positioning a third component across the first and second components and against a fulcrum provided by a second electrical contact, and allowing the two contacts to bias towards each other so that the components turn on their fulcrums and adopt positions in which the third component lies in face-to-face contact with each of the first and second components.
- solder or other composition
- FIGURE 1 is a schematic side view of an assembly in accordance with the present invention.
- FIGURE 2 is a schematic side view of the mechanism of Figure 1, when using thermistors of alternative relative thicknesses;
- FIGURE 3 is a plan view of one contact of the assembly of Figures 1 and 2.
- an assembly according to the present invention comprise ⁇ a frame 10 having two contacts 12, 14 formed of a re ⁇ iliently flexible metal.
- the lower contact 12 comprise ⁇ a relatively thin elongate section 16 which has a wider blade section 18 formed at one end thereof (see Figure 3), with two parallel, elongate ribs 20, 22 being formed on the inner surface of the blade section, across its width.
- the upper contact 14 also compri ⁇ e ⁇ a relatively thin, elongate section which is shaped ⁇ uch that one end thereof face ⁇ the blade section 18 of the lower contact 12 at a generally central position between the two protrusion ⁇ 20, 22.
- Disc thermistors 24, 26, each having metallised upper and lower ⁇ urface ⁇ , are placed on the respective protrusion ⁇ 20, 22 re ⁇ pectively such that the ribs 20, 22 are at a generally central position on the lower surface of the re ⁇ pective di ⁇ c thermi ⁇ tor ⁇ 24, 26. Thu ⁇ , the disc ther istor ⁇ 24, 26 are pivotal about their dia eter ⁇ .
- a third di ⁇ c thermi ⁇ tor 28 i ⁇ placed in a generally central po ⁇ ition acro ⁇ the top ⁇ urface ⁇ of the two thermi ⁇ tor ⁇ 24, 26 and the re ⁇ iliently flexible upper contact 14 of the frame 10 provide ⁇ pre ⁇ ure acro ⁇ s a diameter of the upper ⁇ urface of the third di ⁇ c thermi ⁇ tor 28.
- the thermi ⁇ tor ⁇ will pivot in a clockwi ⁇ e direction to ⁇ uch a degree that the upper surfaces of the thermistor ⁇ 24, 26 lie on a sub ⁇ tantially even plane and in face-to-face contact with the lower ⁇ urface of the third thermistor 28.
- the thermistor ⁇ 24, 26, 28 are held together by the clamping pres ⁇ ure provided by the oppo ⁇ ed pair of contact ⁇ 12 , 14 and by friction between their co-operating ⁇ urface ⁇ .
- the thermistors are securely retained in the required position prior to interconnection, and the po ⁇ ibility of them becoming displaced during ⁇ ub ⁇ equent handling i ⁇ ⁇ ub ⁇ tantially reduced.
- thermistor 26 is thicker than thermistor 24, the three thermistors pivot in an anti-clockwise direction about their diameters, again to such a degree that the upper ⁇ urface ⁇ of thermistors 24, 26 lie in a substantially even plane and in face-to-face contact with the third thermistor 28.
Abstract
An assembly of disc-shaped thermistors, in which first and second thermistors (24, 26) rest on respective fulcrums (20, 22) on a first contact (18), and a third thermistor (28) rests on the first two thermistors (24, 26), with a second contact (14) having a fulcrum against the other side of the third thermistor (28). The two contacts (18, 14) press the thermistors together so that the third thermistor (28) lies in face-to-face contact with the thermistors (24, 26), even though the latter thermistors may differ in thickness.
Description
COMPONENT ASSEMBLY
This invention relates to an assembly of interconnected electrical components, and more particularly but not solely, to an assembly of disc thermistors of different thicknesses. It is often necessary to interconnect components, such as disc thermistors, in a particular configuration, and a known way of achieving this is to initially "dry" assemble and clamp the components within a lead frame, relying on the clamping pressure and also friction between the components to retain them in their desired positions. Interconnection is completed by applying solder (or dipping the arrangement in solder) such that the components become bonded to the frame and to each other.
However, components such as disc thermistors are often of different thicknesses. This becomes a problem when three such thermistors are to be assembled with two thermistors positioned side-by-side and the third positioned to bridge across the tops of those two thermistors. Thus, when the thermistors are "dry" assembled within the frame, the upper thermistor is only in contact with each of other thermistors over a relatively small surface area and the friction between them is weak, such that the thermistors may become displaced during subsequent handling and before application of the solder.
We have now devised an assembly which compensates for differences in the thickness of components and thus overcomes the problem outlined above.
In accordance with this invention, there is provided an assembly of electrical components, comprising a first contact formed with two fulcrums on which respective first and second electrical components rest side-by-side, a third electrical component positioned on the firεt and second electrical components, and a second contact having a fulcrum engaged with the third electrical component, the two contacts pressing the third electrical component into face-to-face contact with each of the first and second electrical componentε.
With this arrangement, if the first and second
electrical components are of different thicknesses, the three components pivot about their respective fulcrums, in response to the pressure applied by the two contacts, to adopt an orientation in which their mutually contacting surfaces are coplanar. the components are thus held firmly in position.
The first contact may be formed with two transverse ribs which provide its two fulcrums. The second contact may be formed with an end portion having a transverse edge lying parallel to and between these two ribs. Also in accordance with this invention, there is provided a method of forming an aεsembly of components, comprising positioning first and second components side-by-side on respective fulcrums which are formed on a first contact, positioning a third component across the first and second components and against a fulcrum provided by a second electrical contact, and allowing the two contacts to bias towards each other so that the components turn on their fulcrums and adopt positions in which the third component lies in face-to-face contact with each of the first and second components.
Once the components have been assembled in this manner, preferably solder (or other composition) is applied to bond the components together and to the respective contacts.
An embodiment of the present invention will now be described with reference to the accompanying drawings, in which:
FIGURE 1 is a schematic side view of an assembly in accordance with the present invention;
FIGURE 2 is a schematic side view of the mechanism of Figure 1, when using thermistors of alternative relative thicknesses;
FIGURE 3 is a plan view of one contact of the assembly of Figures 1 and 2.
Referring to Figure 1, an assembly according to the present invention compriseε a frame 10 having two contacts 12, 14 formed of a reεiliently flexible metal. The lower contact 12 compriseε a relatively thin elongate section 16 which has a wider blade section 18 formed at one end thereof (see Figure 3), with two parallel, elongate ribs 20, 22 being formed on the
inner surface of the blade section, across its width.
The upper contact 14 also compriεeε a relatively thin, elongate section which is shaped εuch that one end thereof faceε the blade section 18 of the lower contact 12 at a generally central position between the two protrusionε 20, 22. Disc thermistors 24, 26, each having metallised upper and lower εurfaceε, are placed on the respective protrusionε 20, 22 reεpectively such that the ribs 20, 22 are at a generally central position on the lower surface of the reεpective diεc thermiεtorε 24, 26. Thuε, the disc ther istorε 24, 26 are pivotal about their dia eterε. A third diεc thermiεtor 28 iε placed in a generally central poεition acroεε the top εurfaceε of the two thermiεtorε 24, 26 and the reεiliently flexible upper contact 14 of the frame 10 provideε preεεure acroεs a diameter of the upper εurface of the third diεc thermiεtor 28. In the caεe where the first thermistor 24 is thicker than the εecond thermiεtor 26, the thermiεtorε will pivot in a clockwiεe direction to εuch a degree that the upper surfaces of the thermistorε 24, 26 lie on a subεtantially even plane and in face-to-face contact with the lower εurface of the third thermistor 28. The thermistorε 24, 26, 28 are held together by the clamping presεure provided by the oppoεed pair of contactε 12 , 14 and by friction between their co-operating εurfaceε. Thus, the thermistors are securely retained in the required position prior to interconnection, and the poεεibility of them becoming displaced during εubεequent handling iε εubεtantially reduced.
Electrical and mechanical interconnection iε completed by applying εolder εuch that the thermiεtorε 24, 26, 28 are bonded to the contactε 12, 14. Some εolder also seepε between lower εurface of the upper thermistor 28 and the upper εurfaceε of the lower ther iεtors 24, 26 (these surfaceε being relatively rough) in order to bond them together. The assembly may in fact be dipped in εolder: the εolder adheres to the metallised faces of the thermistors, but not to its unmetallised peripheral edges
Referring to Figure 2, in the case where thermistor 26 is thicker than thermistor 24, the three thermistors pivot in an anti-clockwise direction about their diameters, again to
such a degree that the upper εurfaceε of thermistors 24, 26 lie in a substantially even plane and in face-to-face contact with the third thermistor 28.
It will be appreciated that, while the present invention has been deεcribed for uεe in retaining diεc thermistors, it would also be suitable for uεe in retaining other components of different thicknesses for interconnection.
Claims
Claims
1) An assembly of electrical components, compriεing a firεt contact formed with two fulcrums on which respective firεt and second electrical components rest side-by-side, a j. 5 third electrical component positioned on said first and second electrical components, and a second contact having a fulcrum engaged with said third electrical component, said first and second contacts presεing said third electrical component into face-to-face contact with each of said firεt and second 10 electrical components.
2) An assembly as claimed in Claim 1, wherein said first and second electrical components are of different thicknesseε, said aεεembly being arranged εo that the three components pivot about their respective fulcru ε, in reεponεe to the preεεure
15 applied by said first and second contacts, to adopt an orientation in which their mutually contacting surfaces are coplanar.
3) An assembly as claimed in Claim 1 or 2, wherein said first contact is formed with two transverεe ribε which provide
20 itε two fulcrums.
4) An assembly as claimed in Claim 3, wherein said second contact is formed with an end portion having a transverse edge lying parallel to and between the two ribs of said first contact.
25 5) An assembly as claimed in any preceding Claim, wherein said electrical components comprise disc-εhaped thermistors.
j 6) An aεεembly of electrical components, the asεembly being substantially as herein deεcribed with reference to the accompanying drawings.
30 7) A method of forming an assembly of components, compriεing positioning firεt and εecond componentε εide-by-side on respective fulcrums which are formed on a first contact,
positioning a third component across said first and second componentε and against a fulcrum provided by a second electrical contact, and allowing the two contacts to bias towards each other so that said components turn on their respective fulcrums and adopt positions in which said third component lieε in face-to-face contact with each of εaid firεt and εecond componentε.
8) A method of forming an assembly of components as claimed in Claim 7, compriεing the further step of applying a composition to bond the components together and to their reεpective contacts.
9) A method of forming an assembly of components as claimed in Claim 7 or 8, wherein said componentε co priεe disc- shaped thermistorε.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU65270/96A AU6527096A (en) | 1995-07-21 | 1996-07-22 | Component assembly |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9515034.8 | 1995-07-21 | ||
| GB9515034A GB2303492A (en) | 1995-07-21 | 1995-07-21 | Contacts for assembly of electronic components |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1997003784A2 true WO1997003784A2 (en) | 1997-02-06 |
| WO1997003784A3 WO1997003784A3 (en) | 1997-03-27 |
Family
ID=10778090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/GB1996/001749 WO1997003784A2 (en) | 1995-07-21 | 1996-07-22 | Component assembly |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU6527096A (en) |
| GB (1) | GB2303492A (en) |
| WO (1) | WO1997003784A2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3878501A (en) * | 1974-01-02 | 1975-04-15 | Sprague Electric Co | Asymmetrical dual PTCR package for motor start system |
| US4939498A (en) * | 1988-02-26 | 1990-07-03 | Murata Manufacturing Co., Ltd. | PTC thermistor device with PTC thermistor unit housed in case |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5055704A (en) * | 1984-07-23 | 1991-10-08 | Sgs-Thomson Microelectronics, Inc. | Integrated circuit package with battery housing |
| JPS6048201U (en) * | 1983-09-09 | 1985-04-04 | ティーディーケイ株式会社 | Positive characteristic thermistor device |
-
1995
- 1995-07-21 GB GB9515034A patent/GB2303492A/en not_active Withdrawn
-
1996
- 1996-07-22 AU AU65270/96A patent/AU6527096A/en not_active Abandoned
- 1996-07-22 WO PCT/GB1996/001749 patent/WO1997003784A2/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3878501A (en) * | 1974-01-02 | 1975-04-15 | Sprague Electric Co | Asymmetrical dual PTCR package for motor start system |
| US4939498A (en) * | 1988-02-26 | 1990-07-03 | Murata Manufacturing Co., Ltd. | PTC thermistor device with PTC thermistor unit housed in case |
Non-Patent Citations (2)
| Title |
|---|
| AIRCRAFT PRODUCTION, vol. 17, no. 2, February 1955, page 81 XP002020159 "Universal screw-vice" * |
| TOOLING & PRODUCTION, vol. 50, no. 8, November 1984, SOLON, OHIO, USA, page 77 XP002020158 * |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9515034D0 (en) | 1995-09-20 |
| GB2303492A (en) | 1997-02-19 |
| WO1997003784A3 (en) | 1997-03-27 |
| AU6527096A (en) | 1997-02-18 |
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