Kobest Co., Ltd

Samsung Sdi Co., Inc.

Pmd Networks Inc.

Sang Cheol Lee

Sung Il Lee

Young Jae Kim

Dong Rak Kim

Jung Kurn Park

In Seob Song

Young Sic Kim

Jong Sik Bae

A power regulatorincludes a power input line, a primary winding connected to the power input lineand wound on a core, a secondary winding, at least part of the secondary winding being in common with the primary winding, at least one tap, andconnected to the primary winding at a predetermined position thereof to specify respective numbers of turns of the primary winding and the secondary winding, at least one switch S, S, and Shaving one end connected respectively to the at least one tap, andand another end connected to a common lineto change the respective numbers of turns of the primary winding and the secondary winding, and an output linefor outputting power that the secondary winding generates as the secondary winding is excited by the primary winding, wherein the respective numbers of turns of both the primary winding and the secondary winding are determined as one of the at least one switch S, S, and Sis closed.

Power regulator and remote power control device

A battery pack that is charged with power generated in an external power generator and supplies battery power to an external load in parallel with the external power generator, and a power receiving device of a portable electronic device that receives and supplies battery power to an external load in parallel with the external power generator, the battery pack including: a battery cell to discharge power based on a charged amount of electric charge; an external power input terminal to receive power from an external power generator; a power output terminal to supply power to an external load; and a voltage transforming circuit to transform voltage of the power received through the external power input terminal to transfer the transformed voltage to the power output terminal.

Battery pack charged by external power generator and supplying discharge power to external load in parallel to external power generator

Disclosed is a bobbin case of a rotary shuttle device for a sewing machine, in which an under thread pulled out of a bobbin is continuously and stably supplied to a sewing region. The bobbin case comprises a main body integrally provided with a body, and a side portion which is bent downward at a side of the body to have a thick portion at which a fixing hole and adjusting hole is formed and a think portion at which a first and second supporting portion and a supporting piece for supporting and guiding the under thread are formed, the first and second supporting portions being divided by a boundary portion which is formed with a discharging hole for discharging the under thread pulled out of a bobbin from an inner portion of the side portion to an outside; and a guide member formed with a coupling hole and a controlling hole which is corresponding to the fixing hole and the adjusting hole and through which a fastening bolt and a controlling bolt are releasably screwed, wherein one end of the guide member is also formed with a first fixing piece and a second fixing piece which are respectively fixedly inserted into the first and second supporting hole formed at the side portion of the main body, and the second fixing piece forms a path, through which the under thread is passed, together with the supporting piece.

Bobbin case of rotary shuttle device for sewing machine

A bobbin for a sewing machine which is rotatably disposed in a rotary shell device of the machine to supply and under thread when performing a sewing operation, comprises of winding shaft separately inserted onto a fixed shaft of the rotary shuttle and on which the under thread is substantially wound, a first flange integrally formed at one end of the winding shaft, a second flange integrally formed at the other end of the winding shaft, and a partition flange forming a first winding portion between the first flange and the partition flange and forming a second winding portion between the second flange and the partition flange, a plurality of saw-toothed protrusions being formed at an entire outer circumference of the partition flange, and the protrusions having a linear sidewall that is oriented in a radial direction of the partition flange.

Growing community of inventors

Seoul, South Korea

Sang Cheol Lee