Andrew M Ford

US Patent:

7952840, May 31, 2011

Filed:

Sep 22, 2008

Appl. No.:

12/235332

Inventors:

Andrew Ford - Plano TX, US
Jerry Shires - Plano TX, US

Assignee:

Unitron, L.P. - Dallas TX

International Classification:

H01H 9/30

US Classification:

361 13

Abstract:

An electrical receptacle includes at least one motion sensor for detecting movement of a blade of an electrical plug in the receptacle, an extraction detector operatively connected to the motion sensor for generating a signal in response to movement of the blade at a predetermined rate, a position detector operatively connected to the motion sensor for determining the position of the blade in the receptacle, a switch operatively connected to the extraction detector and the position detector for de-energizing the receptacle when the extraction detector detects extraction of the blade from the receptacle at a rate equal to or greater than the predetermined and wherein the extraction detector and switch are operative to de-energize the receptacle in less than six milliseconds when the extraction detector detects extraction of the blade from the receptacle at a rate equal to or greater than the predetermined rate.

US Patent:

8472152, Jun 25, 2013

Filed:

May 26, 2011

Appl. No.:

13/116787

Inventors:

Andrew Ford - Plano TX, US
Jerry Shires - Plano TX, US

Assignee:

Unitron, L.P. - Dallas TX

International Classification:

H02H 3/00
H02H 7/00

US Classification:

361 2

Abstract:

An electrical receptacle includes at least one motion sensor for detecting movement of a blade of an electrical plug in the receptacle, an extraction detector operatively connected to the motion sensor for generating a signal in response to movement of the blade at a predetermined rate, a position detector operatively connected to the motion sensor for determining the position of the blade in the receptacle, a switch operatively connected to the extraction detector and the position detector for de-energizing the receptacle when the extraction detector detects extraction of the blade from the receptacle at a rate equal to or greater than the predetermined rate and wherein the extraction detector and switch are operative to de-energize the receptacle in less than six milliseconds when the extraction detector detects extraction of the blade from the receptacle at a rate equal to or greater than the predetermined rate.

US Patent:

20130257143, Oct 3, 2013

Filed:

Mar 28, 2012

Appl. No.:

13/432755

Inventors:

ANDREW FORD - Plano TX, US
JOHN SPENCER DALE - Rockwall TX, US
DENNIS M. BRAUN - Davie FL, US

Assignee:

UNITRON, L.P. - Dallas TX

International Classification:

B60L 1/00

US Classification:

307 91

Abstract:

An apparatus provides electrical power to a ship in port. A first interface interconnects the apparatus with a power grid of the port receiving an input power signal. A second interface interconnects the apparatus with an electrical power grid of the ship to provide an output power signal. Power conversion circuitry receives the input power signal at a first voltage level and generates the output power signal at a selected voltage level and at a selected frequency level responsive to the input power signal. Power control circuitry configures the operation of the power conversion circuitry to generate the output power signal at the selected voltage level and the selected frequency level.