ELECTRICAL FUSE AND HEATER UNITS

• US 3,585,556 A
• Filed: 07/22/1969
• Issued: 06/15/1971
• Est. Priority Date: 07/22/1969
• Status: Expired due to Term

• Current Assignee: Ashok R. Hingorany, Joseph A. Willoughby
• Original Assignee: Ashok R. Hingorany, Joseph A. Willoughby
• Inventors: Hingorany, Ashok R., Willoughby, Joseph A.
• Application Number:
  US04/843,690
• Time in Patent Office: 693 Days
• US Class Current: 337/297
• CPC Class Codes: H01C 1/16 Resistor networks not otherwise provided for
• CPC Class Codes: H01H 2085/0555 Input terminal connected to a plurality of output terminals, e.g. multielectrode
• CPC Class Codes: H01H 85/046 Fuses formed as printed circuits
• CPC Class Codes: H01H 85/263 with spare printed circuit fuse
• CPC Class Codes: H05B 3/26 heating conductor mounted on insulating base for transparent areas H05B3/84, H05B3/86

Abstract

An electrical fuse unit is shown to comprise a composite material embodying a layer of resilient metal sheet material, an electrically insulating sheet material arranged substantially coextensive with and bonded to a sheet surface of the metal sheet material, and at least one electrically conductive fuse element of selected thickness bonded to the insulating sheet material, the fuse element having a pair of terminal portions of selected width electrically interconnected by an intermediate fuse portion of relatively smaller width which is fusible in response to the passage of selected electrical current through the fusible portion. The composite material has a portion formed into semicylindrical shape and has parts of the terminal portions of the fuse element disposed on opposite sides of the semicylindrical portion of the composite material. In this arrangement, the fuse unit is adapted to be disposed between a pair of electrical contact means for resiliently engaging the fuse terminal portions with respective contact means.

Claims

1. An electrical fuse unit comprising a composite material embodying a layer of resilient metal sheet material, an electrically insulating sheet material arranged substantially coextensive with and bonded to a sheet surface of said metal sheet material, and at least one electrically conductive fuse element of selected thickness bonded to said insulating sheet material, said fuse element having a pair of terminal portions of selected width electrically interconnected by an intermediate fuse portion of relatively smaller width fusible in response to the passage of selected electrical current therethrough, said composite material having a portion formed into semicylindrical shape and having parts of said terminal portions of said fuse element disposed on opposite sides of said semicylindrical portion of the composite material whereby said fuse unit can be disposed between a pair of electrical contact means for resiliently engaging said fuse terminal portions with said respective contact means.

2. An electrical fuse unit as set forth in claim 1 wherein said composite material has a generally cylindrical shape forming a portion of a cylinder greater than a semicylinder.

3. An electrical fuse unit as set forth in claim 1 wherein said composite material has two flat portions spaced form each other and connected by said semicylindrical portion.

4. An electrical fuse unit as set forth in claim 1 having a plurality of said electrical fuse elements bonded to said insulating sheet material in spaced relation to each other.

5. An electrical fuse unit comprising a layer of resilient metal sheet material having a portion thereof formed into a plurality of U-shaped fingers each including a semicylindrical sheet metal portion spaced from the ends of said U-shaped fingers, an electrically insulating sheet material arranged substantially coextensive with and bonded to said metal sheet material, and a plurality of electrically conductive fuse elements of selected thickness bonded to said insulating sheet material extending along said respective fingers over said semicylindrical portions thereof, each of said fuse elements having a pair of terminal portions of selected width electrically interconnected by an intermediate fuse portion of relatively smaller width fusible in response to passage of selected electrical current therethrough, each of said semicylindrical portions of said fingers of said metal sheet material being resiliently stressable by a pair of electrical contact means in resiliently engaging respective terminal portions of said fuse elements with said contact means.