John J Schaefer

US Patent:

6462555, Oct 8, 2002

Filed:

May 7, 2001

Appl. No.:

09/850871

Inventors:

John S. Schaefer - Austin TX 78758

International Classification:

G01R 3100

US Classification:

324508

Abstract:

A self-contained unit intended primarily for tracing the circuit connection between an electrical outlet or lighting receptacle and its corresponding circuit-breaker. The preferred embodiment includes a housing, a male three prong electrical plug, a sound-producing means, a first momentary switch which permits testing of a ground fault interrupt across either a hot wire and a neutral, or across a hot wire and the ground; and a second momentary switch which permits testing of reverse polarity by testing across a neutral and the ground. An alternate embodiment incorporates a single 3-way switch. Adapters are used to temporarily adapt bare wires or a lighting receptacle to a female plug so that the device may be used.

US Patent:

7878215, Feb 1, 2011

Filed:

Nov 21, 2008

Appl. No.:

12/275724

Inventors:

Mark McLelland - Raytown MO, US
Bradford T. Stilwell - Blue Springs MO, US
Bon F. Shaw - Blue Springs MO, US
Michael D. Krebill - Lee's Summit MO, US
DeVang Patel - Mill Hill, GB
John K. Schaefer - Knoxville TN, US

Assignee:

Fike Corporation - Blue Springs MO

International Classification:

F16K 17/16
F16K 17/40
F16K 31/44

US Classification:

137 6826, 137 6813, 137 67

Abstract:

A valve for controlling flow of pressurized fluid from a confined area that is operable to relieve an overpressure condition as well as to allow flow of fluid in response to a pressure relief command. The valve including a valve body with a fluid passage therethrough, a reverse buckling rupture disc in the valve body in normally blocking relationship to the flow of fluid through the passage, and a selectively actuatable device carried by the valve body adjacent the convex surface. The actuatable device is operable to disrupt, without puncturing, the disc so as to initiate reversal and rupture of the disc and to permit flow of the pressurized fluid through the passage.

US Patent:

62462253, Jun 12, 2001

Filed:

Jun 14, 1999

Appl. No.:

9/332481

Inventors:

John S. Schaefer - Austin TX

International Classification:

G01R 19145
G01R 1900
G01R 3100
G01R 3102
G08H 300

US Classification:

324133

Abstract:

A self-contained unit intended primarily for tracing the circuit connection between an electrical outlet or lighting receptacle and its corresponding circuit-breaker. The preferred embodiment includes a housing, a male two prong electrical plug, and a sound-producing means. A second embodiment includes a male three prong electrical plug. A third embodiment incorporates a momentary switch which permits testing of a ground fault interrupt across either a hot wire and a neutral, or across a hot wire and the ground. Adapters are used to temporarily adapt bare wires or a lighting receptacle to a female plug so that the device may be used.