Frank L Cameron

41141288, Sep 12, 1978

Oct 10, 1975

5/622279

Frank L. Cameron - Irwin PA

Westinghouse Electric Corp. - Pittsburgh PA

H01H 7120

337162

An indicating composite sectionalized fuse is provided having a high-current interrupting section, and a mechanically-connected detachable low-current interrupting section in series therewith, with the low-current interrupting section including a pull-away indicating fuse-link cable, which indicates externally a blown condition of the fuse. The low-current interrupting section is replaceable, following a low-current interruption, which has no effect upon the high-current interrupting section, the latter remaining intact and may be further used. During high-current interruption, both sections are fused, and collectively contribute together to a quick interruption of the connected electrical circuit, again there being an external indicated condition of the blown condition of the fuse by an ejection of the fuse-link cable. For certain applications, the high-current interrupting section may comprise a current-limiting fuse, so as to limit the value of "let-through" current during a heavy fault-current condition in the line.

40991539, Jul 4, 1978

Mar 8, 1976

5/665137

Frank L. Cameron - North Huntingdon PA

Westinghouse Electric Corp. - Pittsburgh PA

H01H 8504
H01H 8514

337159

A current limiting fuse of the general purpose type utilizes a mandrel which has a plurality of longitudinally oriented and radially spaced ceramic rods around which is wound a fuse element. Gas evolving clamps are disposed along the mandrel to hold the fuse element against the rods of the mandrel. This arrangement tends to maintain the spacing of any given portion of the wound fuse element relative to the other portions thereof. In addition, the gas evolving material evolves arc quenching gas in localized regions between the clamps and the rods during a fusing operation. The pressure of the gas as it is expelled from the localized regions tends to prevent the formation of fulgurites in the regions after the fusing operation has been completed. A fulgurite if formed would enhance the opportunity for a restrike of the arc which is undesirable.

40357554, Jul 12, 1977

Sep 16, 1975

5/613836

Frank L. Cameron - North Huntingdon PA

Westinghouse Electric Corporation - Pittsburgh PA

H01H 8538

337280

An expulsion type fuse is taught which has an opening in the bottom thereof from which hot gases may exit during a fusing operation. The hot gases are provided to a condenser which is disposed adjacent the exit of the expulsion fuse. The disposition of the condenser relative to the fuse is such that none of the gas escapes to any region outside of the expulsion fuse other than the condenser. The condenser has a central axial opening around which is an annularly disposed copper screen. Around the outer periphery of the copper screen is disposed a relatively thin layer of plastic material which may rupture because of pressure or temperature. Around the plastic material is disposed quartz sand. All of the above are disposed within a cylindrical container. When gas exits from the expulsion fuse it is cooled by the copper wire.

40084523, Feb 15, 1977

Aug 1, 1975

5/601580

Frank L. Cameron - North Huntingdon PA

Westinghouse Electric Corporation - Pittsburgh PA

H01H 8512
H01H 8504

337284

A current limiting fuse and an expulsion fuse are disposed in side by side relationship on a common supporting structure. One terminal of each fuse are interconnected electrically. The other terminals of each fuse are spaced by a predetermined insulating gap. An external circuit which includes a voltage source and a load to be protected is connected in series circuit relationship with the terminals of the expulsion fuse. The current limiting fuse is only disposed in circuit relationship with the external circuit for current limiting purposes when the expulsion fuse blows because of a relatively high value of fault current. This causes gaseous products to be directed from an internal portion of the expulsion fuse to a region between the unconnected terminals of both fuses. This gas conducts electrical current, thus in effect connecting the current limiting fuse in parallel circuit relationship with the expulsion fuse to commutate the fault current from the expulsion fuse to the current limiting fuse to provide a fault current limiting operation.

45203377, May 28, 1985

Jul 23, 1984

6/633813

Frank L. Cameron - North Huntingdon PA

Westinghouse Electric Corp. - Pittsburgh PA

H01H 8538

337275

A high voltage circuit interrupter characterized by a tubular insulating casing that encloses a tube of boric acid forming an elongated bore. The bore includes bore portions of smaller and larger diameter. An elongated conductor is disposed in the bore and forms a clearance space therewith. Fusible means extend between the enlarged conductor and a fuse terminal. Upon fusion of the fusible means the larger end portion of the conductor is retracted into the smaller bore portion while maintaining a clearance space therewith, so that a minimal clearance space between the smaller bore portion and the enlarged end portion of the conductor provides adequately high water vapor pressure to extinguish an electric arc generated by fusion of the fusible means.