Johnny R Lam

US Patent:

20100328832, Dec 30, 2010

Filed:

Jul 27, 2006

Appl. No.:

11/990064

Inventors:

Takashi Hasunuma - Narita, JP
Johnny Lam - San Mateo CA, US
Katsuaki Suzuki - Ryugasaki, JP

International Classification:

H02H 5/04
H02H 1/04
H02H 9/02

US Classification:

361 938

Abstract:

An electric device that functions either as a reverting (resettable) type element or a non-reverting (non-resettable) type element depending on the conditions. Such an element includes a polymer PTC element and a temperature fuse member connected in series thereto, the temperature fuse member placed such that it is under the thermal influence of the polymer PTC element. A melting point of a metal composing the temperature fuse member is at least 5 C. higher than a melting point of a polymer composing the polymer PTC element.

US Patent:

58567739, Jan 5, 1999

Filed:

Nov 4, 1996

Appl. No.:

8/743274

Inventors:

Daniel A. Chandler - Menlo Park CA
Johnny Lam - Fremont CA

Assignee:

Raychem Corporation - Menlo Park CA

International Classification:

H01C 710

US Classification:

338 22R

Abstract:

A PTC device suitable for attachment to a terminal of a battery. The device contains a PTC component which has a shape with an outer periphery and an inner periphery which defines a first opening in the center of the PTC component. The PTC component is made from a laminar PTC resistive element which is composed of a PTC conductive polymer composition, a first laminar electrode which is attached to a first face of the resistive element, and a second laminar electrode which is attached to a second opposite face of the resistive element. Also part of the device are a first conductive lead which has a first part which is attached to the first electrode, and a second part which extends into the first opening, and a second conductive lead. The second conductive lead has a first part which is attached to the second electrode, lies within the outer periphery of the PTC component in a plane, and defines a second opening which at least partially overlies the first opening, and a second part which is attached to the first part of the second lead, extends away from the inner periphery of the PTC component toward the opening, and can be bent out of the plane of the first part of the second lead away from the first conductive lead. When the second part of the second lead is bent out of the plane, it allows a welding instrument to be inserted into the opening created, thus allowing direct welding of the device to the terminal.