GB785911A - Improved electrical heater elements - Google Patents
Improved electrical heater elementsInfo
- Publication number
- GB785911A GB785911A GB11824/56A GB1182456A GB785911A GB 785911 A GB785911 A GB 785911A GB 11824/56 A GB11824/56 A GB 11824/56A GB 1182456 A GB1182456 A GB 1182456A GB 785911 A GB785911 A GB 785911A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- plug
- resilient plug
- protruding
- terminal pins
- 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
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/42—Heating elements having the shape of rods or tubes non-flexible
- H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
- H05B3/52—Apparatus or processes for filling or compressing insulating material in tubes
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/42—Heating elements having the shape of rods or tubes non-flexible
- H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
Landscapes
- Resistance Heating (AREA)
Abstract
785,911. Sheathed electric heating resistors. GENERAL MOTORS CORPORATION. April 18, 1956 [May 4, 1955; June 3, 1955], No. 11824/56. Class 39(3) [Also in Group XXII] The heater comprises an outer tube 20 filled with compacted insulation, e.g. magnesium oxide, and containing two or more heating resistance wires 34 extending longitudinally and connected to terminals 22, 24 protruding through one end of the tube, and a resilient plug 26 of heat-resistant synthetic rubber is gripped by compressing the end of tube to locate the terminals, part of the plug protruding from the tube. In Fig. 9 three resistor wires 128 are connected to spaced terminal pins 122 passing through the resilient plug 134 and a second resilient plug 138 is spaced within the tube from the first plug 134 by a ceramic bushing 136, which, on compressing the end of tube, e.g. to a square shape, is crushed. A second ceramic bushing 140 bearing against the inner end of the inner resilient plug is also crushed. The part of the synthetic plug protruding from the end of the chromium steel tube 20 is formed with integral radial or diametral fins 63, 142 extending out between the terminal pins. The plug may be of silicone rubber or Buna N synthetic rubber and its exposed surface and adjacent parts of the pins may have a water repellent coating, e.g. a 2 per cent solution of linear methylpolysiloxanes applied thereto by brushing. The heater is made by supporting by a hook 48 a coiled resistance wire 34 in the tube 20 and pouring powdered magnesium oxide powder through a funnel 50 into the tube, which is vibrated by a mechanical shaker 53. The terminal pins 22 passing through the resilient plug 26 and ceramic bushing 27 are held against sliding by a cup-shaped clamp 28 carrying set screws 30. When the tube is full its top end is compressed by transverse dies to a square shape to hold the wire loop firmly. A cap placed in the open end of the tube is then sealed by turning in the end of the tube and welding it to the cap. The plugged end is then swaged to decrease its diameter from 0.5" to 0.45" or to give a 25 per cent reduction. The tube between the ends is then pressed between dies to a triangular cross-section, preferably after bending the tube to a spiral to form a hot-plate.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US785911XA | 1955-05-04 | 1955-05-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB785911A true GB785911A (en) | 1957-11-06 |
Family
ID=22145018
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB11824/56A Expired GB785911A (en) | 1955-05-04 | 1956-04-18 | Improved electrical heater elements |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB785911A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20190126428A1 (en) * | 2017-10-31 | 2019-05-02 | Ebara Corporation | Heat exchanger for regulating temperature of polishing surface of polishing pad, polishing apparatus having such heat exchanger, polishing method for substrate using such heat exchanger, and computer-readable storage medium storing a program for regulating temperature of polishing surface of polishing pad |
-
1956
- 1956-04-18 GB GB11824/56A patent/GB785911A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20190126428A1 (en) * | 2017-10-31 | 2019-05-02 | Ebara Corporation | Heat exchanger for regulating temperature of polishing surface of polishing pad, polishing apparatus having such heat exchanger, polishing method for substrate using such heat exchanger, and computer-readable storage medium storing a program for regulating temperature of polishing surface of polishing pad |
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