US1749070A - Electric-circuit safety lock - Google Patents
Electric-circuit safety lock Download PDFInfo
- Publication number
- US1749070A US1749070A US243858A US24385827A US1749070A US 1749070 A US1749070 A US 1749070A US 243858 A US243858 A US 243858A US 24385827 A US24385827 A US 24385827A US 1749070 A US1749070 A US 1749070A
- Authority
- US
- United States
- Prior art keywords
- fuse
- electric
- safety lock
- circuit
- mounting
- 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
- 238000010276 construction Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- LFZDEAVRTJKYAF-UHFFFAOYSA-L barium(2+) 2-[(2-hydroxynaphthalen-1-yl)diazenyl]naphthalene-1-sulfonate Chemical compound [Ba+2].C1=CC=CC2=C(S([O-])(=O)=O)C(N=NC3=C4C=CC=CC4=CC=C3O)=CC=C21.C1=CC=CC2=C(S([O-])(=O)=O)C(N=NC3=C4C=CC=CC4=CC=C3O)=CC=C21 LFZDEAVRTJKYAF-UHFFFAOYSA-L 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/10—Adaptation for built-in fuses
- H01H9/104—Adaptation for built-in fuses with interlocking mechanism between switch and fuse
Definitions
- My invention relates to electric circuits involving removable circuit connections such as overload fuses and has for its general object the provision of means whereby a removable circuit connection such as a fuse cannot be removed or replaced while the circuit is otherwise closed, so that the danger involved in removal or replacement of the circuit connection while the circuit is otherwise closed is ebviated, the invention having particular reference to safety in underground mining where explosive gases are often encountered.
- FIG. 1 is a front elevation of electric circuit means embodying my invention with parts broken awayand in section;
- Figure 2 is an end elevation of the same from the line 22 of Figure l and with parts broken away and in section;
- Figure 3 is a partial view from the line 83 of Figure 1.
- 1 designates a casing enclosing therein an electric switch including stationary contacts 2 and movable contacts 3 secured upon a pivoted shaft- 4i for angular movement into and out of engagement with the contacts 2
- the shaft l extends outwardly of the casing with both ends thereof, and an operating handle 5 is secured on one of the shaft ends for the manual operation thereof to open and close the switch.
- an enclosed electric fuse mounting 6 mounted in fixed relation with the casing 1 and disposed upwardly thereof adjacent one end of the same is an enclosed electric fuse mounting 6 provided with an end opening for o the insertion and removal of a suitable electric fuse 7 therein.
- the fuse mounting 6 and the fuse 7 are of a well known construction and require no further description except to note that the fuse is locked in the fuse m0unting against accidental removal by means of a semicircular internally grooved formation 8 on the fuse mounting which is engaged and disengaged with a semicircular flange 9 on the adjacent end of the fuse 7 by angular movement of the fuse when in the mountin See Figure 8.
- a vertically disposed red 12 the upper end of which is flattened and adapted tr move over the end ope r the nuiunting 6 and the end of the fuse herein to 156-1; the fuse against removal in the mounting.
- a crank member 18 seen on the end of the.
- the fuse can only be r moved or replaced when the circuit is in otherwise open condition wit i the result that arcing is prevented in the remo al or replacement of the fuse in the fuse mounting. While I have shown h rein and described one form of mv invention, I do not iish to be limited to the precise details of construction or arrangement of parts herein shown and described except as specifically limited in the appended claims.
- the combination with an enclosed electric switch including a movable switch member, of an enclosed electric fuse mounting provided with an end opening for the insertion and removal of an electric fuse therein, and means operated by said switch member including a locking member movable over said end opening to prevent removal of a fuse in said mounting when said switch member is moved to closed circuit position.
- the combination with an enclosed electric switch including an angularly movable switch member, of an electric circuit connection mounting, a locking member niova'ble into and out of position to prevent remova-l-ofan electric circuit connection on said mounting,
Description
March 4, 1930. A. B. ESSELTINE ELECTRIC CIRCUJII SAFETY LOCK Filed Dec. 31, 1927 Patented Mar. 4, 1930 UNITED STATES PATENT G UODIEAN MANUFAC- lif OF ILLINOIS ELECTRIC-CIRCUIT SAFETY LDCK Application filed December 31, 1927. Serial No. 243,658.
My invention relates to electric circuits involving removable circuit connections such as overload fuses and has for its general object the provision of means whereby a removable circuit connection such as a fuse cannot be removed or replaced while the circuit is otherwise closed, so that the danger involved in removal or replacement of the circuit connection while the circuit is otherwise closed is ebviated, the invention having particular reference to safety in underground mining where explosive gases are often encountered.
The invention will be more readily under stood by reference to the accompanying dravw ings, in which:
Figure 1 is a front elevation of electric circuit means embodying my invention with parts broken awayand in section;
Figure 2 is an end elevation of the same from the line 22 of Figure l and with parts broken away and in section;
Figure 3 is a partial view from the line 83 of Figure 1.
Like characters of reference indicate like parts in the several views.
Referring to the drawing, 1 designates a casing enclosing therein an electric switch including stationary contacts 2 and movable contacts 3 secured upon a pivoted shaft- 4i for angular movement into and out of engagement with the contacts 2 The shaft l extends outwardly of the casing with both ends thereof, and an operating handle 5 is secured on one of the shaft ends for the manual operation thereof to open and close the switch.
Mounted in fixed relation with the casing 1 and disposed upwardly thereof adjacent one end of the same is an enclosed electric fuse mounting 6 provided with an end opening for o the insertion and removal of a suitable electric fuse 7 therein. The fuse mounting 6 and the fuse 7 are of a well known construction and require no further description except to note that the fuse is locked in the fuse m0unting against accidental removal by means of a semicircular internally grooved formation 8 on the fuse mounting which is engaged and disengaged with a semicircular flange 9 on the adjacent end of the fuse 7 by angular movement of the fuse when in the mountin See Figure 8. b
Mounted for longitudinal movement in a board bracket 11 on the switch casing 1 is a vertically disposed red 12 the upper end of which is flattened and adapted tr move over the end ope r the nuiunting 6 and the end of the fuse herein to 156-1; the fuse against removal in the mounting. A crank member 18 seen on the end of the. shaft l opposite that en rob the handle 5 is secured and underlyin he rod 12, and a corn necting link has .7 ends nivotally connected respectively with the oiiter end of the crank member 13 and the lewer-end of the rod 12 whereby the rod 12 is actuated vertically with pivotal movement of the shaft 4 the arrangement sing such that when the switch is closed "t e upper end of the rod overlies the adjacen d o the fuse mounting and fuse therein and locks f n the mount-- ing, and when the swi h is open the rod 12 is in a lower position v i the upper end there-- of disposed below the end obeniug of the fuse mounting and fuse therein, thus unlocking the same I01 removal or replacement of the fuse.
The switch being circuit with the fuse mounting, the fuse can only be r moved or replaced when the circuit is in otherwise open condition wit i the result that arcing is prevented in the remo al or replacement of the fuse in the fuse mounting. While I have shown h rein and described one form of mv invention, I do not iish to be limited to the precise details of construction or arrangement of parts herein shown and described except as specifically limited in the appended claims.
I claim as my invention:
1. In a device of the character described, the combination with an enclosed electric switch including a movable switch member, of an enclosed electric fuse mounting provided with an end opening for the insertion and removal of an electric fuse therein, and means operated by said switch member including a locking member movable over said end opening to prevent removal of a fuse in said mounting when said switch member is moved to closed circuit position.
2. In a device of the character described, the combination with an enclosed electric switch including an angularly movable switch member, of an electric circuit connection mounting, a locking member niova'ble into and out of position to prevent remova-l-ofan electric circuit connection on said mounting,
and connecting link andcrank means for op erating said locking member into and out of said position with opposite movements of said switch member.
3. In a device of the cli a'raictiei" described, the combination with an enclosed electric switch including an anguia'rly' nibvable and ate of Illinois, this 28th day of December, A. D. 1927. v
ALFRED B. ES'SELTINE;
Signed at Chicago, in the county ofCook
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US243858A US1749070A (en) | 1927-12-31 | 1927-12-31 | Electric-circuit safety lock |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US243858A US1749070A (en) | 1927-12-31 | 1927-12-31 | Electric-circuit safety lock |
Publications (1)
Publication Number | Publication Date |
---|---|
US1749070A true US1749070A (en) | 1930-03-04 |
Family
ID=22920407
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US243858A Expired - Lifetime US1749070A (en) | 1927-12-31 | 1927-12-31 | Electric-circuit safety lock |
Country Status (1)
Country | Link |
---|---|
US (1) | US1749070A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2558074A (en) * | 1949-09-29 | 1951-06-26 | Westinghouse Electric Corp | Interlocking mechanism for metal enclosed switchgears |
-
1927
- 1927-12-31 US US243858A patent/US1749070A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2558074A (en) * | 1949-09-29 | 1951-06-26 | Westinghouse Electric Corp | Interlocking mechanism for metal enclosed switchgears |
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