US804070A - Electrical fuse-plug. - Google Patents

Electrical fuse-plug. Download PDF

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Publication number
US804070A
US804070A US26160405A US1905261604A US804070A US 804070 A US804070 A US 804070A US 26160405 A US26160405 A US 26160405A US 1905261604 A US1905261604 A US 1905261604A US 804070 A US804070 A US 804070A
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US
United States
Prior art keywords
fuse
plug
casing
cap
clip
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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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US26160405A
Inventor
George B Thomas
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Bryant Electric Co
Original Assignee
Bryant Electric Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
US case filed in Connecticut District Court litigation Critical https://portal.unifiedpatents.com/litigation/Connecticut%20District%20Court/case/3%3A18-cv-00214 Source: District Court Jurisdiction: Connecticut District Court "Unified Patents Litigation Data" by Unified Patents is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Bryant Electric Co filed Critical Bryant Electric Co
Priority to US26160405A priority Critical patent/US804070A/en
Application granted granted Critical
Publication of US804070A publication Critical patent/US804070A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
    • H01H85/044—General constructions or structure of low voltage fuses, i.e. below 1000 V, or of fuses where the applicable voltage is not specified
    • H01H85/045—General constructions or structure of low voltage fuses, i.e. below 1000 V, or of fuses where the applicable voltage is not specified cartridge type
    • H01H85/0454—General constructions or structure of low voltage fuses, i.e. below 1000 V, or of fuses where the applicable voltage is not specified cartridge type with screw-in type contacts

Definitions

  • My invention relates to the thermal cutout plugs for electrical circuits, and particuio larly to that type of plug which is adapted to a fuse-plug of the above character which will be efficient in use and inexpensive to manufacture and more convenient than any heretofore made, one of the principal objects of my invention being to so construct the plug zo that the fuse-cartridge may be inserted or replaced without removing the entire plug from the branch block or receptacle, as will be hereinafter more fully described.
  • Figure I represents a vertical axial section of a fuseplug with a fuse therein embodying my invention, the cap being separated from the maincasing; and Fig. 2 is a plan view of the casing with the cap removed. Fig. 3 is a 3o view of the inner face of the cap.
  • A represents a casing of porcelain or other suitable insulating material, preferably in the form of a hollow cylinder adapted to be opened at one end for the admission of the fuse-cartrid ge and closed at the other end by the contact-terminals of the plug.
  • the plug is of the familiar form, having a threaded terminal adapted to 'fit a socket and a central contact-terminal, the closed end is made 4o of the proper size to receive on its outside the usual external threaded ring T, as shown in the drawings.
  • the terminal ring is electrically connected by solder or otherwise to the extended lower ends c of sockets C, which are 4 5 set in openings in the side walls of the casing A and are open at the upper or open end of the casing.
  • the casing which is of cylindrical shape, has a cen- 5o tral chamber B, preferably cylindrical and slightly larger than the fuse-cartridge D to be inserted therein.
  • a spring clip-piece P At the lower end of the chamber B is a spring clip-piece P, having a plurality of legs p, in this case four, adapted to mechanically engage the metallic end of the fuse-cartridge D and be in electrical contact therewith as well.
  • This clip-piece is secured to the casing by any suitable means, such as the rivet R, which passes through the centralpart of the closed end of the casing and forms the central terminal of the plug.
  • the open end of the casing is provided with a cap E, which is preferably slightly hollowed on its inner face and has a central recess F, in which is secured a clip P, similar to the clip P in the casing, except that the clip in the cap is provided with more or stronger grasping-legs jp to engage the upper end of the fuse-cartridge D, so that the clip P within the casing will yield sooner than the clip P/ within the cap, and therefore when the cap is removed the fuse will come ofll with the cap for ready inspection and renewal.
  • the clip I3 has laterally-extending legs p2 in electrical connection with pins p3, which are adapted to enter the split spring-sockets C C. These pins p3 may be mechanically secured to the cap by screws s, which may also serve to secure the clip-piece p.
  • a fuse-plug for fuse-cartridges an insulating-casing carrying external contactterminals, and a clip-piece secured to the inner end of said casing, adapted to engage a fuse-cartridge, in combination with a cap to cover the end of said casing, and means therein adapted to remove said fuse from the casing when the cap is removed.
  • an insulating-casing carrying external contactterminals and means secured to the inner end of said casing adapted to engage a fuse-cartridge, in combination with a cap to cover the end of said casing, and means in said cap to engage said fuse-cartridge, said engaging means in the cap being the stronger.
  • a fuse-plug for fuse-cartridges an insulating-casing carrying an external terminal ring, and a clip-piece secured to the inner end of said casing adapted to engage one end of a fuse-cartridge, in combination with a cap to fit over said casing and a clip-piece in the cap to engage the opposite end of said cartridge, said second clip being stronger than said first clip.

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  • Fuses (AREA)

Description

No. 804,070. f PATENTED NOV. 7, 1905. G. B. THOMAS.
ELECTRICAL FUSE PLUG.
APPLIGATION FILED M122. 1905.
' INVENTOR ATTORNEYS WITNESSES UNITED srATnsgPArnNr OFFICE.
GEORGE B. THOMAS, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO THE BRYANT ELECTRIC COMPANY, OF BRIDGEPORT, CONNECTICUT, A COR- PORATION OF CONNECTICUT.
ELECTRICAL FUSE-PLUG.
Specification of Letters Patent.
Patented Nov. '7, 1905.
Application filed May Z2, 1905. Serial No. 261,604.
To @ZZ whom, i2? puny concern:
Be it known that I, GEORGE B. THOMAS, a citizen of the United States of America, residing in the city of Bridgeport, in the county 5 of Fairfield, in the State of Connecticut, have invented an Improved Electrical Fuse-Plug,
of which the following is a specification.
My invention relates to the thermal cutout plugs for electrical circuits, and particuio larly to that type of plug which is adapted to a fuse-plug of the above character which will be efficient in use and inexpensive to manufacture and more convenient than any heretofore made, one of the principal objects of my invention being to so construct the plug zo that the fuse-cartridge may be inserted or replaced without removing the entire plug from the branch block or receptacle, as will be hereinafter more fully described.
In the accompanying drawings, Figure I represents a vertical axial section of a fuseplug with a fuse therein embodying my invention, the cap being separated from the maincasing; and Fig. 2 is a plan view of the casing with the cap removed. Fig. 3 is a 3o view of the inner face of the cap.
A represents a casing of porcelain or other suitable insulating material, preferably in the form of a hollow cylinder adapted to be opened at one end for the admission of the fuse-cartrid ge and closed at the other end by the contact-terminals of the plug. If the plug is of the familiar form, having a threaded terminal adapted to 'fit a socket and a central contact-terminal, the closed end is made 4o of the proper size to receive on its outside the usual external threaded ring T, as shown in the drawings. The terminal ring is electrically connected by solder or otherwise to the extended lower ends c of sockets C, which are 4 5 set in openings in the side walls of the casing A and are open at the upper or open end of the casing. These sockets are preferably split at their open ends, as shown. The casing, which is of cylindrical shape, has a cen- 5o tral chamber B, preferably cylindrical and slightly larger than the fuse-cartridge D to be inserted therein. At the lower end of the chamber B is a spring clip-piece P, having a plurality of legs p, in this case four, adapted to mechanically engage the metallic end of the fuse-cartridge D and be in electrical contact therewith as well. This clip-piece is secured to the casing by any suitable means, such as the rivet R, which passes through the centralpart of the closed end of the casing and forms the central terminal of the plug. The open end of the casing is provided with a cap E, which is preferably slightly hollowed on its inner face and has a central recess F, in which is secured a clip P, similar to the clip P in the casing, except that the clip in the cap is provided with more or stronger grasping-legs jp to engage the upper end of the fuse-cartridge D, so that the clip P within the casing will yield sooner than the clip P/ within the cap, and therefore when the cap is removed the fuse will come ofll with the cap for ready inspection and renewal. The clip I3 has laterally-extending legs p2 in electrical connection with pins p3, which are adapted to enter the split spring-sockets C C. These pins p3 may be mechanically secured to the cap by screws s, which may also serve to secure the clip-piece p.
I claim as my invention- 1. In a fuse-plug for fuse-cartridges, an insulating-casing carrying external contactterminals, and a clip-piece secured to the inner end of said casing, adapted to engage a fuse-cartridge, in combination with a cap to cover the end of said casing, and means therein adapted to remove said fuse from the casing when the cap is removed.
2. In a fuse-plug for fuse-cartridges, an insulating-casing carrying external contactterminals and means secured to the inner end of said casing adapted to engage a fuse-cartridge, in combination with a cap to cover the end of said casing, and means in said cap to engage said fuse-cartridge, said engaging means in the cap being the stronger.
3. In a fuse-plug for fuse-cartridges, an insulating-casing carrying an external terminal ring, and a clip-piece secured to the inner end of said casing adapted to engage one end of a fuse-cartridge, in combination with a cap to fit over said casing and a clip-piece in the cap to engage the opposite end of said cartridge, said second clip being stronger than said first clip.
4. In a fuse-plug for fuse-c artridges, an in- IOO IOS
the cartridge and remove the same when said Cap is removed and means whereby said clip is electrically Connected to one of said termi- 15 nals, when the cap is put in place.
In testimony whereof I have signed my name t0 this specification in the presence of two subscribing witnesses.
GEORGE B. THOMAS. Iitnesses G. W. GooDRIDe-E7 II. W'. GOLDSBOROUGH.
US26160405A 1905-05-22 1905-05-22 Electrical fuse-plug. Expired - Lifetime US804070A (en)

Priority Applications (1)

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US26160405A US804070A (en) 1905-05-22 1905-05-22 Electrical fuse-plug.

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US26160405A US804070A (en) 1905-05-22 1905-05-22 Electrical fuse-plug.

Publications (1)

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US804070A true US804070A (en) 1905-11-07

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