GB1492779A - Induction heating apparatus for mass production - Google Patents
Induction heating apparatus for mass productionInfo
- Publication number
- GB1492779A GB1492779A GB5487174A GB5487174A GB1492779A GB 1492779 A GB1492779 A GB 1492779A GB 5487174 A GB5487174 A GB 5487174A GB 5487174 A GB5487174 A GB 5487174A GB 1492779 A GB1492779 A GB 1492779A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- workpieces
- transformer
- work
- work coil
- 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.)
- Expired
Links
Landscapes
- General Induction Heating (AREA)
Abstract
1492779 Induction heating ITT INDUSTRIES Inc 19 Dec 1974 [28 Dec 1973 3 Jan 1974) 54871/74 Heading H5H [Also in Division H1] An induction heater comprises a R.F. generator 10 connected to a primary coil 1 of a transformer, and an induction heating work coil 2 electrically connected to the secondary coil 3 of the transformer, the work coil 2 being movable relative to the primary coil 1. As shown, the transfer circuit comprising secondary coil 3 and work coil 2, are rotated about a vertical axis A-A<SP>1</SP> centred on the axes of the primary and secondary coils 1 and 3 so that the work coil 2 passes successively a plurality of pairs of workpieces 6, 7 &c. mounted on a fixed table 8. The coupling gap between the work coil 2 and workpieces 6, 7 which are being welded, is maintained constant by ensuring the transfer circuit rotates in a plane parallel to the table 8. The R.F. generator may be continuously energized and the transfer circuit may be rotated continuously during heat treatment of the workpieces 6, 7. In Fig. 2b which is for making glass to metal seals on workpieces 6, the workpieces 6 and a plurality of transfer circuits 21, 23 are both mounted on a circular table 8 which is rotatable to bring the secondary transformer coils 23 of the transfer circuits successively into coupled relationship with the fixed primary coil of the transformer. Supports 22 for the transfer circuits 21, 23 have two degrees of freedom to allow coupling between the work coils 21 and workpieces 6 to be adjusted prior to heating. In Fig. 4, not shown, for making vacuum or gas filled discharge tubes each work coil and vacuum tube workpiece are mounted in an individual chamber which may be evacuated or filled with gas. Each work coil is connected through a gas tight seal to an externally mounted secondary transformer coil of the transfer circuit. The chambers are movable to bring their secondary coils into successive coupling relationship with the fixed primary coil.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7346737A FR2256623A1 (en) | 1973-12-28 | 1973-12-28 | High frequency induction heating system - using two piece inductor, one section rotating with the worktable |
FR7400133A FR2257186A2 (en) | 1974-01-03 | 1974-01-03 | Inductive heating device for mfr light tubes - has sealed housing for metal-glass tube sealing process |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1492779A true GB1492779A (en) | 1977-11-23 |
Family
ID=26218102
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5487174A Expired GB1492779A (en) | 1973-12-28 | 1974-12-19 | Induction heating apparatus for mass production |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1492779A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5522003A (en) | 1993-03-02 | 1996-05-28 | Ward; Robert M. | Glass preform with deep radial gradient layer and method of manufacturing same |
-
1974
- 1974-12-19 GB GB5487174A patent/GB1492779A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5522003A (en) | 1993-03-02 | 1996-05-28 | Ward; Robert M. | Glass preform with deep radial gradient layer and method of manufacturing same |
US5673353A (en) | 1993-03-02 | 1997-09-30 | Ward; Robert M. | Fiber and lens preform with deep radial gradient layer and method of manufacturing same |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
CSNS | Application of which complete specification have been accepted and published, but patent is not sealed |