US2444385A - Alternating electric current rectifier - Google Patents
Alternating electric current rectifier Download PDFInfo
- Publication number
- US2444385A US2444385A US643091A US64309146A US2444385A US 2444385 A US2444385 A US 2444385A US 643091 A US643091 A US 643091A US 64309146 A US64309146 A US 64309146A US 2444385 A US2444385 A US 2444385A
- Authority
- US
- United States
- Prior art keywords
- rectifier
- layer
- alternating electric
- electric current
- current rectifier
- 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 - Lifetime
Links
- 239000011810 insulating material Substances 0.000 description 7
- 239000002184 metal Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 5
- 239000011669 selenium Substances 0.000 description 5
- 229910052711 selenium Inorganic materials 0.000 description 5
- 239000003973 paint Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/06—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising selenium or tellurium in uncombined form other than as impurities in semiconductor bodies of other materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
Definitions
- This invention relates to alternating electric current rectifiers of the dry surface contact type. and has for its object to provide improved arrangements for protecting a rectifier of this character from surrounding atmospheric or other conditions so as to be reliable and durable in service.
- rectifiers of this type it is very necessary to prevent the access of water or moist air to the rectifying or contact electrode surface and special precautions in this respect have to be taken in rectifiers for service in tropical climates or other similar atmospheric conditions as otherwise the rectifiers soon deterioriate or become completely inoperative.
- This layer of metal in combination with the insulating strips 4 and 5 acts to seal the electrode 3 against the access of moisture and thus serves as an effective means for protecting the rectifier when assembled in a stack against surrounding atmospheric or other conditions.
- the stack as a whole may be painted, in which event the paint will seal any opening which may exist between the base plate and the opposite exposed portion of the insulating strip 4.
- a continuous relatively thin strip or band of insulating material is applied to each edge of the coated base plate so as to overlap the adjacent edge of the contactelectrode, and a layer of non-porous metal or alloy is applied to the element so as to cover tionalview showing one form of rectifier element constructed in accordance with my invention.
- the rectifier element I here shown is of the selenium type and comprises a suitable base plate I in the form of a circular washer provided on one side with a layer 2 of selenium the outer surface of which-is covered, except for a small annular area at its inner and outer edges, with a counter or contact electrode 3.
- a relatively thin ring or band of insulating material 4 is placed against the contact electrode 3 at its. outer edge in a manner to overlap the adjacent edge of the contact electrode and a
- Theinvention mayevidently also be applied to ,a rectifier of the copper oxide type for the purpose of preventing the access of moisture to the contact electrode which is utilized to establish electrical connection with the oxide layer,
- a rectifier element comprising a metal washer coated on one face with a selenium composition to which a-contact layer of suitable conducting material is applied, said washer having an annular uncoated area at its outer and inner edges, a relatively thin band of insulating material applied to each edge of said 2,444,885 3 element so as to overlap the inner and outer REFERENCES CITED edges of'said contact layer.
- annular openings are provided at each edge of said washer 2; ifig gggg are of record m the for the reception oi a paint seal, and a.
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Insulating Bodies (AREA)
Description
June 1948- L. E. THOMPSON r 2,444,385
ALTERNATING ELECTRIC CURREKT RECTIFIER Filed Jan. 24, 1946 Bare Plafe I IN VENTOR LemlzEzmeyzT/zampron HIS ATTORNEY Patented June 29,1948
UNITED sTA Es PATENT orrics Appllcation January 24, 1946, Serial No. 643,091
. In Great Britain Jul! 6, 1945 2 Claims. (Cl. 175-366) 1 This invention relates to alternating electric current rectifiers of the dry surface contact type. and has for its object to provide improved arrangements for protecting a rectifier of this character from surrounding atmospheric or other conditions so as to be reliable and durable in service.
In rectifiers of this type it is very necessary to prevent the access of water or moist air to the rectifying or contact electrode surface and special precautions in this respect have to be taken in rectifiers for service in tropical climates or other similar atmospheric conditions as otherwise the rectifiers soon deterioriate or become completely inoperative.
It is found by experience that the usual protection of a coating of paint or varnish is not permanently effective for this purpose, and although the cooling and. spacing element usually provided in contact with the counter or contact electrode is to a considerable extent effective in protecting the surface of the rectifier, moisture is still apt to enter between the electrode'and the rectifying layer at the edges thereof while extension of this cooling element up to or beyond the edges of the electrode is liable to cause a similar ring 5 is similarly placed against the contact electrode at its inner edge. The two' insulatmg bands and the intervening portion of the contact electrode which is not covered by the insulating strips are then provided with a layer of non-porous metal preferably applied by spraying as shown at 8. This layer of metal in combination with the insulating strips 4 and 5 acts to seal the electrode 3 against the access of moisture and thus serves as an effective means for protecting the rectifier when assembled in a stack against surrounding atmospheric or other conditions. After the rectifier has been assembled in a stack, the stack as a whole may be painted, in which event the paint will seal any opening which may exist between the base plate and the opposite exposed portion of the insulating strip 4.
short circuit between the counteror contact electrode and the base plate to which the selenium or other rectifying layer is applied.
In one form of the invention as applied to a rectifier of the selenium type a continuous relatively thin strip or band of insulating material is applied to each edge of the coated base plate so as to overlap the adjacent edge of the contactelectrode, and a layer of non-porous metal or alloy is applied to the element so as to cover tionalview showing one form of rectifier element constructed in accordance with my invention.
Referring to the drawing, the rectifier element I here shown is of the selenium type and comprises a suitable base plate I in the form of a circular washer provided on one side with a layer 2 of selenium the outer surface of which-is covered, except for a small annular area at its inner and outer edges, with a counter or contact electrode 3. A relatively thin ring or band of insulating material 4 is placed against the contact electrode 3 at its. outer edge in a manner to overlap the adjacent edge of the contact electrode and a Theinvention mayevidently also be applied to ,a rectifier of the copper oxide type for the purpose of preventing the access of moisture to the contact electrode which is utilized to establish electrical connection with the oxide layer,
and in thes and other respects the invention is not limited to the particular arrangement above described by way of example.
Although I have herein shown and described only one form of electrical rectifier embodying my invention, it is understood that various changes and modifications may be made therein of suitable conducting material is applied, said member having an annular uncoated area at its edge. a thin band of insulating material applied to said element so as to overlap the edge of said contact layer, whereby an annular opening is provided between said band of insulating material and the uncoated portion of said member for the reception of a paint seal, and a layer of nonporous metal or alloy applied by spraying and covering the central portion of the contact layer and the band of insulating material.
2. In. combination with a rectifier element comprising a metal washer coated on one face with a selenium composition to which a-contact layer of suitable conducting material is applied, said washer having an annular uncoated area at its outer and inner edges, a relatively thin band of insulating material applied to each edge of said 2,444,885 3 element so as to overlap the inner and outer REFERENCES CITED edges of'said contact layer. whereby annular openings are provided at each edge of said washer 2; ifig gggg are of record m the for the reception oi a paint seal, and a. layer oi non-porous metal or y applied b spraying 5 UNITED STATES PATENTS and covering said ban of insulating material Numb N and the portion of said contact layer between 3 gg 3 '9 said bands to prevent the access of moisture to 3.345.122 Hermann Man 28 1944 said contact layer. v
LESLIE THOMPSON. I
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2444385X | 1945-07-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2444385A true US2444385A (en) | 1948-06-29 |
Family
ID=10907097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US643091A Expired - Lifetime US2444385A (en) | 1945-07-06 | 1946-01-24 | Alternating electric current rectifier |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2444385A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2680220A (en) * | 1950-06-09 | 1954-06-01 | Int Standard Electric Corp | Crystal diode and triode |
| US2758263A (en) * | 1952-01-08 | 1956-08-07 | Ericsson Telefon Ab L M | Contact device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2246161A (en) * | 1938-06-14 | 1941-06-17 | Gen Electric | Selenium cells and method of producing the same |
| US2345122A (en) * | 1939-10-17 | 1944-03-28 | Herrmann Heinrich | Dry rectifier |
-
1946
- 1946-01-24 US US643091A patent/US2444385A/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2246161A (en) * | 1938-06-14 | 1941-06-17 | Gen Electric | Selenium cells and method of producing the same |
| US2345122A (en) * | 1939-10-17 | 1944-03-28 | Herrmann Heinrich | Dry rectifier |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2680220A (en) * | 1950-06-09 | 1954-06-01 | Int Standard Electric Corp | Crystal diode and triode |
| US2758263A (en) * | 1952-01-08 | 1956-08-07 | Ericsson Telefon Ab L M | Contact device |
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