US1708859A - Electrical apparatus - Google Patents
Electrical apparatus Download PDFInfo
- Publication number
- US1708859A US1708859A US160478A US16047827A US1708859A US 1708859 A US1708859 A US 1708859A US 160478 A US160478 A US 160478A US 16047827 A US16047827 A US 16047827A US 1708859 A US1708859 A US 1708859A
- Authority
- US
- United States
- Prior art keywords
- bushing
- casing
- shoulder
- clamping ring
- ring
- 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
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/26—Lead-in insulators; Lead-through insulators
- H01B17/30—Sealing
- H01B17/301—Sealing of insulators to support
Definitions
- My invention relates to electrical apparatus and more particularly to encased electrical apparatus provided withunsulatlng bushings extending through openlngs 1n the casing for insulating conductors connected to the apparatus.
- the invention is an improvement on the arrangement of bushings disclosed in lUnlted States Patent-No. 1,494,293 issued May 13,
- the general object of the invention is to I provide an improved arrangement of parts whereby such bushings may be readlly secured in place or removed from the apparatus 15 casing.
- Fig.1 shows a fragment of an elec- 2o trical apparatus casing with a bushing secured in place in accordance with the inven tion
- Fig. 2 is an. exploded View of the parts which are shown assembled in Fig. 1
- Flg. 3 is a view of a transformer casing provided with bushings formed and securedun position in accordance with the invention
- Fig. 4 shows a detail of the assembled parts.
- the invention will be described in connection with bushings for 'atransformer casing 11.
- the casing 11 is shown as having overhanging portions 12 at its upper part, a bushing 10 being secured 1n an opening 1n each of these overhanging portions.
- the bushing 10 has a large outer end to provide the'necessary creepage surface between its conductor 13 and the casing 11 which may be ounded.
- This enlarged outer end of the bus li in has a shoulder 14 which fits against a suitable gasket 15 on the outer surface of the casing 11 to provide a tight oint between the bushin and casing.
- the bushing has a constricte neck 16 in front of the shoulder 14 and ending in a second shoulder 17 having an outer diameter smaller than that of the shoulder 1a, the two spaced shoulders 14 and 17 being formed to face each other with the constricted neck 16 between them.
- the bushing 19 is secured in place -by means of an annular clamping ring 18, a looking ring 19 and a set of screws 20.
- the gasket is around the bushing against the shoulder 14 and the inner or smaller end Y of the bushing inserted through the opening with the gasket 15 against the outer surface of the casing.
- the annular clamping ring 18 has an inner diameter greater than the outer diameter of the smaller shoulder 17 and this is slipped over the inner end of the bushing onto the constricted neck 16 and close to the inner surface of the casing and the'locking ring 19 is then fitted between the shoulder 17 of the bushing and the inner edge portion of the clamping ring 18.
- the opening in the clamping ring 18 is just large enough to pass easily over the inner end of the bushing so that it cannot be forced past the shoulder 17 while thelocking ring 19 is in place.
- the locking ring 19 is preferably formed of a narrow strip of flexible and compressible material bent into a ring to fit between the dioulder 17 of the bushing and the inner edge portion of the clamping ring 18 and fiber board has 85 been found to be a satisfactory material.
- This compressible and flexible locking ring serves to distribute the pressure of the clamping ring 18 over the surface of the shoulder 17 of the bushing which is usually of brittle material such as porcelain and breakage of the bushingby the pressure of the clamping ring is thus minimized.
- said locking ring comprising a narrow flat strip of tough compressible material to distribute the pressure of the clamping ring on the shoulder, the surfaces mosses ing" ring, and means for forcing said clamping ring toward said locking ring and the smaller 10 shoulder to force the larger shoulder toward said casing.
Description
April 9, 1929. H. M. ACLY ELECTRICAL APPARATUS Filed Jan. 11, 1927 Inventor: Flarry IVLACIH, Hi5) Atto Pg.
Patented Apia 9, 19290 uurren sraras PITTSFIELD, MASSACHUSETTS, ASSIGNOR TO GENERAL ELECTRIC CDMPANY, A GORPQTIGN 9? NEW YORK.
HARRY M. ACLY, F
ELECTRICAL AIPEARATUS.
Application filed January 11, 1927. Serial No. 160,478.
My invention relates to electrical apparatus and more particularly to encased electrical apparatus provided withunsulatlng bushings extending through openlngs 1n the casing for insulating conductors connected to the apparatus.
The invention is an improvement on the arrangement of bushings disclosed in lUnlted States Patent-No. 1,494,293 issued May 13,
1Q 1924, on an application filed by T. H Sclater.
The general object of the invention is to I provide an improved arrangement of parts whereby such bushings may be readlly secured in place or removed from the apparatus 15 casing.
The invention will be better understood from the following'description taken in connection with the accompanying drawing 1n which Fig.1 shows a fragment of an elec- 2o trical apparatus casing with a bushing secured in place in accordance with the inven tion; Fig. 2 is an. exploded View of the parts which are shown assembled in Fig. 1; Flg. 3 is a view of a transformer casing provided with bushings formed and securedun position in accordance with the invention; and Fig. 4 shows a detail of the assembled parts.
Like reference characters indicate sim lar parts in the different figures of the drawing.
The invention will be described in connection with bushings for 'atransformer casing 11. The casing 11 is shown as having overhanging portions 12 at its upper part, a bushing 10 being secured 1n an opening 1n each of these overhanging portions. vThe bushing 10 has a large outer end to provide the'necessary creepage surface between its conductor 13 and the casing 11 which may be ounded. This enlarged outer end of the bus li in has a shoulder 14 which fits against a suitable gasket 15 on the outer surface of the casing 11 to provide a tight oint between the bushin and casing. The bushing has a constricte neck 16 in front of the shoulder 14 and ending in a second shoulder 17 having an outer diameter smaller than that of the shoulder 1a, the two spaced shoulders 14 and 17 being formed to face each other with the constricted neck 16 between them. The bushing 19 is secured in place -by means of an annular clamping ring 18, a looking ring 19 and a set of screws 20. To assemble secure the bushing in place through its opening in the casing 11, the gasket is around the bushing against the shoulder 14 and the inner or smaller end Y of the bushing inserted through the opening with the gasket 15 against the outer surface of the casing. The annular clamping ring 18 has an inner diameter greater than the outer diameter of the smaller shoulder 17 and this is slipped over the inner end of the bushing onto the constricted neck 16 and close to the inner surface of the casing and the'locking ring 19 is then fitted between the shoulder 17 of the bushing and the inner edge portion of the clamping ring 18. The opening in the clamping ring 18 is just large enough to pass easily over the inner end of the bushing so that it cannot be forced past the shoulder 17 while thelocking ring 19 is in place. The
The invention has been described in what is now considered its preferred embodiment but it will be obvious that changes may be made without departing from the scope of the inventionas defined by the appended 0 arm.
What I claim asnew and desire to secure w portion of said clamping ring and said smaller shoulder, said locking ring comprising a narrow flat strip of tough compressible material to distribute the pressure of the clamping ring on the shoulder, the surfaces mosses ing" ring, and means for forcing said clamping ring toward said locking ring and the smaller 10 shoulder to force the larger shoulder toward said casing.
In witness whereof, I have hereunto set my hand this 7th day of Jan, 1927,
HARRY M. ACLY.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US160478A US1708859A (en) | 1927-01-11 | 1927-01-11 | Electrical apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US160478A US1708859A (en) | 1927-01-11 | 1927-01-11 | Electrical apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
US1708859A true US1708859A (en) | 1929-04-09 |
Family
ID=22577035
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US160478A Expired - Lifetime US1708859A (en) | 1927-01-11 | 1927-01-11 | Electrical apparatus |
Country Status (1)
Country | Link |
---|---|
US (1) | US1708859A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3009983A (en) * | 1959-09-30 | 1961-11-21 | Gen Electric | Bushing structure for electric apparatus |
-
1927
- 1927-01-11 US US160478A patent/US1708859A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3009983A (en) * | 1959-09-30 | 1961-11-21 | Gen Electric | Bushing structure for electric apparatus |
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