Tatsuaki Ambo - Houston TX, US Gary Dean Conner - Cypress TX, US
Assignee:
Toshiba International Corporation - Houston TX
International Classification:
H02H007/122
US Classification:
363 5605, 363 98
Abstract:
A power converter includes a current source providing an input current, a transformer having primary and secondary windings, a switch network coupling the current source and the primary winding, and a clamping circuit coupled to the switch network. An output bus is coupled to the secondary winding and provides an output voltage. A control circuit has inputs based on the output voltage and the input current, and generates switch network control signals based on those inputs. The control circuit also generates clamping circuit control signals based on the switch network control signals. The power converter may also include a start-up control circuit configured to selectively control the switch network and the clamping circuit so as to raise the output voltage to a desired level. In some embodiments, the switch network is a full bridge, and the clamping circuit includes first and second clamping switches.
A support or attachment for attaching lines or articles to a tree branch or other cylindrical structure. The apparatus includes two springed flanges biased by the spring. The flanges include opposed-opening hooks, one at the end of each flange. The hooks form an opening when the springed flanges are compressed, form a closed attachment means where the flanges are released and are substantially co-planar when in the compressed and released positions.
Donna Woods, Russell Chasteen, Billy Nelson, Margaret Mullins, Anthony Chase, Dennis Marsee, Angela Watts, Jennifer Adcock, Mary Houser, John Whitney, Jeanine Tolbert, Glenn Martin