US716833A - Method of breaking electric currents. - Google Patents
Method of breaking electric currents. Download PDFInfo
- Publication number
- US716833A US716833A US102084A US1902102084A US716833A US 716833 A US716833 A US 716833A US 102084 A US102084 A US 102084A US 1902102084 A US1902102084 A US 1902102084A US 716833 A US716833 A US 716833A
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- United States
- Prior art keywords
- fuse
- electric currents
- chamber
- breaking electric
- arms
- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/38—Means for extinguishing or suppressing arc
- H01H85/42—Means for extinguishing or suppressing arc using an arc-extinguishing gas
Definitions
- the present invention relates to a novel method of rupturing electric currents and extinguishing the are formed by such rupture. It is particularly applicable for service in connection with safety-fuses, though it is applicable in its broader features also to circuits not containing such fuses.
- the invention is carried out by forming the are within a contracted chamber and stretching it along a path of small cross-section, by which its resistance is rapidly augmented, thereby weakening its power and contributing toward its extinguishment.
- I cause an expulsive blast to be directed laterally of the arc-stream, which tends to sever or cut the stream into two parts, and thereby extinguish it.
- FIG. 1 is an end elevation, partly in section, of a cut-out operating in accordance with my invention.
- Fig. 2 is a side View, partly in section, of the same.
- the cut-out proper is composed of a baseplate 1, of insulating material, having attached thereto side plates 2 2, which serve as guards. Mounted on the base-plate at suitable distances apart are two castings, having ears 3 3. Pivoted to each pair of cars is a bifurcated or U-shaped spring-actuated arm 4. The actuating-spring 5 is coiled about the pivot 6 between the bifurcations of the arm 4:. One end of the spring engages the arm and the other end the body of the supportingcasting 7. The springs are so arranged as to urge the upper ends of the arms away from each other.
- Suitable clamping devices 8 are arranged at the outer extremity of the arms, between which a fuse 9 is secured, so as to hold the arms in a position perpendicular to the base 7, as shown.
- the fuse is thus normally maintained in a state of tension.
- manently mounted between the arms and overlapping an end of each of the castings 7 is a block of insulating material 10.
- superposed thereon are two renewable blocks 11 and 12, of insulating material, each block having a hollow formed therein, so that when placed together, as shown in the drawings, a chamber 13 is formed.
- An opening 14 in the upper block 11 communicates with the chamher so formed.
- the arms and insulatingblocks are so proportioned and arranged as to allow the fuse 9 to pass freely between the blocks 11 and 12 and through the chamber 13. That portion of the fuse passing through this chamber is made of smaller cross-section. than the remaining parts in order to insure the formation of the arc within the chamber instead of between the insulating-blocks.
- barriers which in this case are plates 22, of fiber or other insulating material, sliding in grooves in the side plates 2.
- the barriers, together with the insulating-blocks, are all held in place by bolts provided with thumbscrews 15. By removing the thumb-screws and pressing back the bolts the barriers may be slid out of the grooves and so withdrawn in order to permit the insertion or renewal of the fuse.
- I provide the castings 7 with fins 16, which extend through the base-plate and are adapted to engage spring-clips 17, carried by the connecting-bolts 18.
- the connecting-bolts are passed through a bushing 19, which is fitted in an opening in the switchboard 20.
- the method of opening an electric circuit consisting in maintaining a fusible conductor under tension, restraining the spread of arc-gases developed on metallic or similar conductive rupture axially of the fuse toward the terminals, and simultaneously expelling such gases from the fuse in a direction at an angle to its axis.
Description
,833. Patented Dec. 23, I902.-
W. L. R. EMMET. METHOD OF BREAKING ELECTRIC CURBENTS.
(Application filed Apr. 9, 1902.)
(No Model.)
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Inventor:
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UNITED STATES PATENT O FICE.
\VILLIAM L. R. EMMET, OF SCHENECTADY, NEl/V YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.
METHOD OF BREAKING ELECTRIC CURRENTS.
SPECIFICATION forming part of Letters Patent No. 716,833, dated December 23, 1902.
Original application filed August 24, 1898, Serial No. 689,378. Divided and this application filed April 9, 1902. Serial NO.1OZ,O84. (No modelf:
To all whom it may concern:
Be it known that 1, WILLIAM L. R. EMMET, a citizen of the United States, residing at Schenectady, in the county of Schenectady, State of New York, have invented certain new and useful Improvements in Methods of Breaking Electric Currents, (Case No. 2,831,) of which the following is a specification.
This application is a division of my pending application, Serial No. 689,378, filed August 24, 1898, and is made in accordance with the requirement of the Patent Office.
The present invention relates to a novel method of rupturing electric currents and extinguishing the are formed by such rupture. It is particularly applicable for service in connection with safety-fuses, though it is applicable in its broader features also to circuits not containing such fuses.
The invention is carried out by forming the are within a contracted chamber and stretching it along a path of small cross-section, by which its resistance is rapidly augmented, thereby weakening its power and contributing toward its extinguishment. To further assist this result, I cause an expulsive blast to be directed laterally of the arc-stream, which tends to sever or cut the stream into two parts, and thereby extinguish it.
The invention may be carried out by difierent forms of apparatus, one effective device being indicated in the accompanying drawings, in which Figure 1 is an end elevation, partly in section, of a cut-out operating in accordance with my invention. Fig. 2 is a side View, partly in section, of the same.
The cut-out proper is composed of a baseplate 1, of insulating material, having attached thereto side plates 2 2, which serve as guards. Mounted on the base-plate at suitable distances apart are two castings, having ears 3 3. Pivoted to each pair of cars is a bifurcated or U-shaped spring-actuated arm 4. The actuating-spring 5 is coiled about the pivot 6 between the bifurcations of the arm 4:. One end of the spring engages the arm and the other end the body of the supportingcasting 7. The springs are so arranged as to urge the upper ends of the arms away from each other. Suitable clamping devices 8 are arranged at the outer extremity of the arms, between which a fuse 9 is secured, so as to hold the arms in a position perpendicular to the base 7, as shown. The fuse is thus normally maintained in a state of tension. manently mounted between the arms and overlapping an end of each of the castings 7 is a block of insulating material 10. Superposed thereon are two renewable blocks 11 and 12, of insulating material, each block having a hollow formed therein, so that when placed together, as shown in the drawings, a chamber 13 is formed. An opening 14 in the upper block 11 communicates with the chamher so formed. The arms and insulatingblocks are so proportioned and arranged as to allow the fuse 9 to pass freely between the blocks 11 and 12 and through the chamber 13. That portion of the fuse passing through this chamber is made of smaller cross-section. than the remaining parts in order to insure the formation of the arc within the chamber instead of between the insulating-blocks.
In order to prevent any possibility of the are formed in the chamber 13 from passing to either of the spring-actuated arms, I find it advisable to provide barriers, which in this case are plates 22, of fiber or other insulating material, sliding in grooves in the side plates 2. The barriers, together with the insulating-blocks, are all held in place by bolts provided with thumbscrews 15. By removing the thumb-screws and pressing back the bolts the barriers may be slid out of the grooves and so withdrawn in order to permit the insertion or renewal of the fuse.
In order to make connections with the fuse, I provide the castings 7 with fins 16, which extend through the base-plate and are adapted to engage spring-clips 17, carried by the connecting-bolts 18. The connecting-bolts are passed through a bushing 19, which is fitted in an opening in the switchboard 20. In-
Per-
YVhat I claim as new, and desire to secure by Letters Patent of the United States, is
The method of opening an electric circuit, consisting in maintaining a fusible conductor under tension, restraining the spread of arc-gases developed on metallic or similar conductive rupture axially of the fuse toward the terminals, and simultaneously expelling such gases from the fuse in a direction at an angle to its axis.
In Witness whereof I have hereunto set my hand this 5th day of April, 1902.
WILLIAM L. R. EMMET.
Witnesses: 7
BENJAMIN B. HULL, HELEN ORFORD.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US102084A US716833A (en) | 1898-08-24 | 1902-04-09 | Method of breaking electric currents. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US68937898A US716398A (en) | 1898-08-24 | 1898-08-24 | Fuse. |
US102084A US716833A (en) | 1898-08-24 | 1902-04-09 | Method of breaking electric currents. |
Publications (1)
Publication Number | Publication Date |
---|---|
US716833A true US716833A (en) | 1902-12-23 |
Family
ID=2785352
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US102084A Expired - Lifetime US716833A (en) | 1898-08-24 | 1902-04-09 | Method of breaking electric currents. |
Country Status (1)
Country | Link |
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US (1) | US716833A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030061036A1 (en) * | 2001-05-17 | 2003-03-27 | Harinath Garudadri | System and method for transmitting speech activity in a distributed voice recognition system |
-
1902
- 1902-04-09 US US102084A patent/US716833A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030061036A1 (en) * | 2001-05-17 | 2003-03-27 | Harinath Garudadri | System and method for transmitting speech activity in a distributed voice recognition system |
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