(19) United States
(12) Patent Application Publication (io) Pub. No.: US 2002/0024787 Al
Anthony (43) Pub. Date: Feb. 28,2002
(54) POLYMER FUSE AND FILTER APPARATUS
(75) Inventor: Anthony A. Anthony, Erie, PA (US)
HAHN LOESER & PARKS, LLP
TWIN OAKS ESTATE
1225 W. MARKET STREET
AKRON, OH 44313 (US)
(73) Assignee: X2Y Attenuators, L.L.C.
(21) Appl. No.: 09/939,547
(22) Filed: Aug. 24, 2001
Related U.S. Application Data
(63) Continuation of application No. 09/583,831, filed on May 31, 2000.
(51) Int. CI.7 110211 5 04
(52) U.S. C I 361/106
The present invention relates to a polymer fuse apparatus that provides bypass fuse protection. A polymer bypass fuse is comprised of an electrical conductor wherein a portion of the conductor is surrounded by an internal electrode, which is then surrounded by a layer of polymeric positive temperature coefficient (PTC) material, which is then surrounded by a conductive material similar to that of the internal electrode.
Various hybrid combinations are also contemplated where in-line and/or bypass fuses are combined with other circuit components. One example is, a plurality of in-line and bypass fuses combined with a differential and common mode filter, which itself consists of a plurality of common ground conductive plates maintaining first and second electrode plates between the various conductive plates, all of which are surrounded by a material having predetermined electrical characteristics to provide fail safe filter and circuit protection.