baber/WOPTO huggingface dataset:
Patent KR-20110015565-A (KR)
Inventor: COOK II JAMES H
IPC: C07D498/20
Filed: 2009-04-20
Abstract: 본원의 개시는, 하기 화학식 I의 화합물 (그의 염 포함), 및 상기 화합물을 사용하는 조성물 및 방법을 제공한다.  상기 화합물은 니코틴성 α7 수용체에 대한 리간드이고, 이는 다양한 중추신경계 장애, 특히 정동 장애 및 신경변성 장애의 치료에 유용할 수 있다. 
<화학식 I>
Patent KR-20110014612-A (KR)
Inventor: REESINK BENNIE
IPC: F25B21/00
Filed: 2009-04-27
Abstract: 본 발명은 예를 들어, 하기로부터 선택되는 열자기 물질을 포함하는 열교환기용 연속셀 다공질 성형체에 관한 것이다: 
(1) 하기 화학식 (I)의 화합물: 
(A y B y   -1 ) 2+δ C w D x E z  					(I) 
[상기 식 중,  
A는 Mn 또는 Co이고, 
B는 Fe, Cr 또는 Ni이며, 
C, D 및 E는 C, D 및 E 중 2 이상이 상이하고, 비소실(non-vanishing) 농도를 가지며, P, B, Se, Ge, Ga, Si, Sn, N, As 및 Sb로부터 선택되며, 여기서 C, D 및 E 중 1 이상은 Ge 또는 Si이고,  
δ는 -0.1∼0.1 범위의 수이며, 
w, x, y, z는 0∼1 범위의 수이고, w + x + z = 1임].
Patent KR-20110018344-A (KR)
Inventor: MATTISSON LEIF
IPC: H04L69/40
Filed: 2009-05-06
Abstract: 하나 이상의 요건 사양들과의 컴플라이언스를 검증하기 위한 방법이 제공된다. 상기 방법은: 테스트 시스템 및 통신 디바이스 사이의 링크를 설정하는 단계로서, 상기 설정 단계는 둘 이상의 베어러들, 하나 이상의 제어 채널들, 및 하나 이상의 업링크 패킷 필터들을 구성하는 단계를 포함하는, 링크를 설정하는 단계; 테스트 시스템 및 통신 디바이스를 포함하는 테스트 루프를 폐쇄하는 단계로서, 상기 폐쇄 단계는 통신 디바이스의 테스트 루프 기능을 활성화하는 단계를 포함하는, 루프를 폐쇄하는 단계; 테스트 루프의 다운링크에서의 상이한 서비스 데이터 플로우들과 연관되는 데이터의 유닛들을 테스트 시스템으로부터 상기 통신 디바이스로 송신하는 단계로서, 데이터의 유닛들의 각각은 데이터의 유닛과 연관되는 서비스 데이터 플로우를 나타내는 정보를 포함하는, 송신 단계; 통신 디바이스에서 데이터를 수신하는 단계; 데이터의 유닛들을 통신 디바이스의 업링크 송신 장치로 전송하는 단계; 및 테스트 시스템에서, 데이터의 유닛들의 각각이, 하나 이상의 업링크 패킷 필터들에 따라 상기 각각의 데이터의 유닛과 연관되는 상기 서비스 데이터 플로우에 대응하는 정확한 베어러 상에서, 상기 테스트 루프의 업링크에서의 통신 디바이스에 의해 상기 테스트 시스템으로 송신되는지를 검증하는 단계를 포함한다. 대응하는 테스트 시스템 및 테스트 루프 기능 장치가 또한 개시된다.
Patent KR-20120082483-A (KR)
Title: A ring lighter
Inventor: SONG GYU SEOP
IPC: F23Q2/48
Filed: 2011-01-14
Abstract: PURPOSE: A ring lighter is provided to use fire for smoking while putting on a finger like a ring. CONSTITUTION: A ring lighter comprises a button(30), flints(4,32), a rubber plate(31), and a rechargeable gas container(10). The rechargeable gas container is connected to an outlet(12) through a hose(11). The rubber plate is attached with the flints and blocks the outlet. The flints are closely formed to rub each other. The rubber plate and the button are connected each other. When the button comes down to make fire, a spring is installed under the button to put out the fire. If the button is put out, the rubber plate blocks the outlet where gas comes out to extinguish fire.
Patent KR-20120083700-A (KR)
Title: Broadcasting apparatus of public vehicle and audio control apparatus of general vehicle
Inventor: KIM DONG SHIN
IPC: H04H20/62
Filed: 2011-01-18
Abstract: PURPOSE: A broadcast device of a public vehicle and an audio control device of a general vehicle are provided to wirelessly transmit an alarm signal, an audio signal of an announcement broadcast signal, and password data of a password storage unit. CONSTITUTION: An audio signal processing unit(103) processes an alarm signal an announcement broadcast signal. If an audio signal of the audio signal processing unit is detected, a control unit(104) outputs password data of a password storage unit(105). A signal transmitting unit(106~109) wirelessly transmits password data of the password storage unit and the audio signal.
Patent KR-20120083981-A (KR)
Inventor: KIM JUNG HOON
IPC: A47B21/00
Filed: 2011-01-19
Abstract: 쌍방향 시청각 교육이 가능한 전자교탁 시스템이 개시된다. 컴퓨터가 내장된 본체와; 상기 본체의 상부에 결합된 제1 모니터와; 전방을 향하도록 상기 본체에 결합된 제2 모니터와; 상기 본체의 상부에 결합된 본체 마이크를 포함하는 듀얼 모티터를 구비하는 전자교탁 시스템이 제공된다.
Patent KR-20120086064-A (KR)
Title: Apparatus, method and system for providing of augmented reality integrated information
Inventor: KIM WOO JIN
IPC: G06T7/00
Filed: 2011-01-25
Abstract: PURPOSE: An augmented reality integration information providing device and a method thereof, and a system with the same are provided to analyze AR data about an object and search additional data based on analysis data, thereby integrally providing AR data with additional search data about an object. CONSTITUTION: An image obtaining unit(110) obtains an image about an object including an AR(Augmented Reality) code. A data processing unit(130) analyzes the AR code, extracts category information from AR data corresponding to the object, and generate search request data using the category information and/or interest information that a user sets. A communication unit(150) performs data communication with an AR server and a search server. The interest information is set before a category is extracted from AR data corresponding to the object.
Patent KR-20120088375-A (KR)
Title: Method for transmitting push message, mobile terminal receiving the push message and system thereof
Inventor: LEE KI HO
IPC: H04B7/26
Filed: 2011-01-31
Abstract: PURPOSE: A portable terminal and push message transmission method are provided to transmit a push message to a WLAN(Wireless Local Area Network) access network using a mobile communication network. CONSTITUTION: A portable terminal connects to a wireless AP(Access Point) when the portable terminal enters into a WLAN service zone(S107,S109). A GGSN(Gateway GPRS Support Node) creates an address mapping table(S115). A push notification server creates a push message(S117). The GGSN confirms the address mapping table of the portable terminal(S121). When a WLAN MAC(Medium Access Control) address is registered, the GGSN transmits the push message to the portable terminal using the WLAN AP(S123~S127).
Patent KR-20120088438-A (KR)
Inventor: LEE JUNG HO
IPC: E02D5/80
Filed: 2011-01-31
Abstract: 지선 로드 일체형 지선 근가 및 설치 방법을 개시한다. 전주의 지선에 연결되어 설치되는 지선 로드 일체형 지선 근가는 원뿔 형태로 이루어진 근가, 근가의 외주면에 배치되는 나사산 및 일부가 근가에 매몰되어 고정되고 지선과 연결되는 지선 로드를 포함한다.
Patent KR-20120092392-A (KR)
Title: Method for releasing rrc connection in wireless communication system
Inventor: PARK CHOONG WAN
IPC: H04B7/26
Filed: 2011-02-11
Abstract: PURPOSE: An RRC(Radio Resource Control) connection release method in a radio communication system is provided to reduce the number of necessary messages between a terminal and an RNC(Radio Network Controller). CONSTITUTION: A terminal transmits a cell update message including an RRC connection release indication to an RNC(S400). The RNC transmits an IU release request message to a GPRS(General Packet Radio Service)(S410). The packet exchange support node transmits the IU release command message to the RNC(S420). The RNC transmits an RRC connection release message to the terminal(430). The RNC transmits the IU release completion message to the packet exchange support node(S440).
Patent KR-20120093571-A (KR)
Title: RECOMBINANT EXPRESSION VECTOR FOR MASS PRODUCTION OF ENDO-β-XYLANASE A DERIVED FROM PHANEROCHAETE CHRYSOSPORIUM AND MANUFACTURING METHOD THEREOF
Inventor: PARK SEUNG MOON
IPC: C12N15/56
Filed: 2011-02-15
Abstract: PURPOSE: A method for producing a large amount of endo-1,4-beta xylanase A using a recombinant vector is provided to isolate and purify the enzyme by affinity chromatography. CONSTITUTION: A recombinant expression vector for producing a large amount of endo-1,4-beta xylanase A comprises: a nucleic acid sequence encoding an AOXI promoter regulated by methanol; and a nucleic acid sequence encoding endo-1,4-beta xylanase A containing secretion signal sequence derived from white rot fungi. The white rot fungi are Phaenerocheate chrysosporium BKM-F-1767(KCTC 6147). The endo-1,4-beta xylanase A containing white rot fungi-derived secretion signal sequences is a nucleic acid sequence of sequence number 1.
Patent KR-20120093600-A (KR)
Title: A sterile cup using light-emitting device
Inventor: LEE YOUNG TAEK
IPC: A61L2/08
Filed: 2011-02-15
Abstract: PURPOSE: A sterilizing cup using a light emitting device is provided to sterilize contents inside the cup or the outer surface of the cup by controlling the light emitting device. CONSTITUTION: A sterilizing cup using a light emitting device comprises the following: a body unit(10) for storing contents; an inner sterilizing unit(20) sterilizing the inner surface of the body unit or the contents; and a controller(30) controlling the operation of the inner sterilizing unit. The controller transmits a signal to the inner sterilizing unit for sterilizing. The body unit is produced with a material selected from glass, ceramics, or plastic.
Patent KR-20120094318-A (KR)
Title: A small pro-apparatus for mine
Inventor: LEE YOUNG KI
IPC: E02F3/43
Filed: 2011-02-16
Abstract: PURPOSE: Small and multifunctional equipment for a mine is provided to rapidly and conveniently separate a bucket and an arm from the equipment depending on the type of a work. CONSTITUTION: Small and multifunctional equipment for a mine comprises a traveling body(10), an operation body(20), a boom(30), a first expansion device(30') for a boom, a quick connecting device(50), an arm(40), a second expansion device(40') for an arm, a bucket(60), a third expansion device(60') for a bucket, and a perforator. A drive unit is installed on the traveling body. The operation body is installed on the top of the traveling body. The boom is installed on the front of the operation body and is rotated around a hinge. The first expansion device operates the boom. The quick connecting device is installed on the end of the boom and is rotated around a hinge. The arm is installed on the quick connecting device and has a rotating device(70). The second expansion device operates the arm. The bucket is installed on the end of the arm to be rotated around a hinge. The third expansion device operates the bucket. The perforator is formed on the quick connecting device.
Patent KR-20120100546-A (KR)
Title: Apparatus for removing snow of a vinyl house
Inventor: PARK SAM SIK
IPC: E04H9/16
Filed: 2011-03-04
Abstract: PURPOSE: A snow removal device for a plastic greenhouse using heated and compressed air is provided to spray the heated and compressed air toward the ceiling of the plastic greenhouse for removing the snow from the outside of the plastic greenhouse by melting. CONSTITUTION: A snow removal device is installed on a plastic greenhouse(V) including a frame(F) and a plastic sheet. The snow removal device comprises the following: a spraying pipe(40) rotatably installed on end inside the frame using a rotator, including a nozzle(41) on the outside; a compressor(50) compressing air, and transferring the compressed air to the spraying pipe through a transfer pipe(51); a heating unit(60) heating the compressed air; an air tank(61) storing the compressed air; a stove(62) firstly heating the compressed air inside the air tank; and an electric heater(63) secondly heating the air.
Patent KR-20120106046-A (KR)
Title: Active air flap
Inventor: SO WON SUB
IPC: B62D25/08
Filed: 2011-03-17
Abstract: PURPOSE: An active air flap is provided to prevent damage or the malfunction of an active air flap by preventing the separation of a door caused by the inflow of foreign materials into a door shaft. CONSTITUTION: An active air flap(400) comprises an air duct(430), a door(420), and an actuator(440). The air duct is installed in the rear portion of an opening portion and guides the inflow of air. The door is comprised in the air duct. The door opens and closes the air duct by rotation using a shaft(420a) formed on both sides of a door. The door comprises a protection part(500) separated with the rotation part of the shaft. The protection part is formed to enclose the shaft. The actuator is comprised in the air duct and rotates the door.
Patent KR-20110106239-A (KR)
Inventor: HERSHEY JOHN ERIK
IPC: H04B1/00
Filed: 2011-03-21
Abstract: 센서 섀시(102)를 구성하는 방법과 시스템(100, 200)이 제공된다. 제공된 방법에서, 입력 신호를 압축하여 샘플링하는 센서 섀시(102)에 의해 파라미터 집합이 원격 수신될 수 있다. 또한, 입력 신호를 압축 샘플링하는 압축 샘플링 프로토콜이 원격 수신된 파라미터 집합에 기초하여 동적으로 결정될 수 있다. 특히, 압축 샘플링 프로토콜은 원하는 샘플링 성능을 달성하기 위해 동적으로 결정될 수 있다. 그 이후에, 입력 신호는 결정된 압축 샘플링 프로토콜에 따라 압축 샘플링된다.
Patent KR-20120108260-A (KR)
Title: Battery pack of improved safety
Inventor: LEE JIN KYU
IPC: H01M2/10
Filed: 2011-03-23
Abstract: PURPOSE: A battery pack is provided to improve safety by shutting of a connection circuit of voltage sensing members to a battery pack control part by a safety member in case of short circuit in the battery sensing member. CONSTITUTION: A battery pack(800) comprises: a battery laminate in which a plurality of battery cells or unit modules which are connected in direct and/or in series are laminated; a voltage sensing elements(110,120) electrically connecting the battery pack control part, for detecting voltage of the battery cell or unit module by being electrically connected to an electrode terminal connection part of battery cells respectively located on a front side and/or a backside of the battery laminate; and a safety element shutting off a connection circuit of the voltage sensing member to the battery control part in case of a short circuit in the battery sensing member.
Patent KR-20120108361-A (KR)
Title: Rotating rolls hairstyles machine
Inventor: LEE YEONG SEON
IPC: A45D1/04
Filed: 2011-03-23
Abstract: PURPOSE: A rotary roll hair styling device is provided to change various kinds of brushes according to need and to effectively prevent burn. CONSTITUTION: A rotary roll hair styling device comprises a main body, a deceleration unit, a rotary thermal cylinder, an arm, an elastic support protrusion, a molding board, brush, and an LED temperature indicator. In the main body, a mounting space is formed. A circuit board and a drive motor are built in the mounting space. The deceleration unit is installed in the mounting space of the main body and is connected to the drive motor. The rotary shaft of the rotary thermal cylinder is connected to the deceleration unit. The arm is rotationally hinge-coupled with the other side of the main body. The elastic support protrusion is installed in the arm. The molding board is combined with the end of the arm and is equipped with a heater. The brush is detachably installed in both sides of the molding board. The LED temperature indicator is installed in the main body.
Patent KR-20120110852-A (KR)
Title: Method and apparatus for detecting botnet
Inventor: SHIN HYO JEONG
IPC: H04L12/26
Filed: 2011-03-30
Abstract: PURPOSE: A bot-net detection method and apparatus thereof are provided to detect bot-net by determining the variable of a domain based on a response for DNS(Domain Name Server) queries. CONSTITUTION: A variable domain database(150) stores the IP(Internet Protocol) address of a domain and a domain list which an IP address is converted. The variable domain database manages the danger information of the stored domain. A bot-net determination unit(170) compares the variation of an IP address in a second domain based on a response packet. The bot-net determination unit updates the variable domain database. When the danger information of the second domain is over a standard value, the bot-net determination unit determines the second domain as a server domain related to the control and attack command of the botnet. [Reference numerals] (110) Packet collection unit; (130) Bot net blocking unit; (150) Variable database; (170) Bot net determination unit
Patent KR-20120117458-A (KR)
Title: Membrane-electrode assembly and fuel cell stack of the same
Inventor: KU YOU SUN
IPC: H01M8/10
Filed: 2011-04-15
Abstract: PURPOSE: A membrane-electrode assembly is provided to improve cold starting ability by reducing a volume of a gas diffusion layer and to increase flow surface area of reaction gas by obtaining flow channels of a separator. CONSTITUTION: A membrane-electrode assembly(20) arranged between separators in which channels(CH) are formed, and gas-diffusion layers(23) formed on both sides of a membrane-electrode layer(21). On the gas diffusion layer, a membrane-electrode layer, which corresponds with the channel, is exposed. The gas diffusion layer comprises an exposed part(41) exposing the membrane-electrode layer and corresponding with the channels and an adhesion part(43) attached to a land part(LD) of the external side of the channel.
Patent KR-20120121006-A (KR)
Title: Apparatus for managing a mark pick-up sensor which is had in starting air distributing system for heavy engine
IPC: F02D41/22
Filed: 2011-04-26
Abstract: PURPOSE: A MP(Mark Pick up sensor) management device of a starting air distributing system for a large-sized engine is provided for users to easily manage the large engine. CONSTITUTION: A mark pick up sensor management device(100) of a Starting Air Distributing system for a large-sized engine comprises a VCAm(Value of Crankshaft Angle)(VCA which the MP mechanical tolerance is reflected) acquiring module(103), a VCAs(VCA which the MP senses) acquiring module(104), a VCAm and VCAs difference value calculation module(105), a MP warning state processing module(107). The VCAm acquiring module receives the VCAm considering the mechanical tolerance of a MP(Mark Pick up sensor). The VCAs acquiring module acquires the VCAs sensed by the MP. The VCAm and VCAs difference value calculation module calculates the difference value between the VCAs and the VCAs. The MP warning state processing module delivers the information on the MP warning state to a controller(2) if the difference value notifies the warning about the MP. [Reference numerals] (101) MP management control module; (102) Interface module; (103) VCAm acquiring module; (104) VCAs acquiring module; (105) VCAm/VCAs difference value calculation module; (106) Module for saving the standard index for determining the state of the MP; (107) MP warning state processing module; (108) Module for processing the failure state of the MP
Patent KR-20120122016-A (KR)
Title: Method for fabricating solar cell
IPC: H01L31/0236
Filed: 2011-04-28
Abstract: PURPOSE: A method for fabricating a solar cell is provided to improve an aspect ratio using a removed trench in a subsequent paste printing process. CONSTITUTION: A substrate is textured on the front side of a substrate(302). An oxide film(303) is formed on the front side of the substrate. Photoresist is selectively coated on the oxide film. A trench from which the oxide film is removed is created on the substrate. A high concentration emitter(305) is formed within the trench.
Patent KR-20120124791-A (KR)
Title: Non-tracking concentrated Photovoltaic Modules
IPC: H01L31/052
Filed: 2011-05-04
Abstract: PURPOSE: A non-tracking concentrated photovoltaic module is provided to improve energy conversion efficiency by concentrating light having high energy density in a wavelength band. CONSTITUTION: A reflective layer(100) reflects incident light and discharges heat. A solar cell housing(110) is formed on the reflective layer. A wavelength separation type nanopattern(120) amplifies light in a specific wavelength band. An anti-reflection layer(130) is composed of a plurality of thin films.
Patent KR-20120128272-A (KR)
Title: Doorlock having pressure measurement apparatus
IPC: E05B65/00
Filed: 2011-05-17
Abstract: PURPOSE: A door lock with a differential pressure measuring device is provided to form a differential pressure measuring device in various types of door locks installed as an auxiliary installation in a fire door. CONSTITUTION: A closing member(20) is installed to rotate in a second installing hole of an external door lock body. The closing member includes a closing unit(22) and a connecting unit(24) of a disk shape. The closing unit is located around the second installing hole of the external door lock body. The connecting unit is formed by extending from one side of the closing unit. The connecting unit passes through the second installing hole. The connecting unit is selectively connected to a measuring member through the connecting unit prepared in an inside.
Patent KR-20120129111-A (KR)
Title: Air conditioner
IPC: F25B43/02
Filed: 2011-05-19
Abstract: PURPOSE: An air-conditioner is provided to effectively recover oil to the inlet port of a compressor by controlling the oil according to an oil level. CONSTITUTION: An air-conditioner comprises a plurality of compressors(110), a plurality of oil separators(171), a plurality of oil return pipes(177), a plurality of oil return valves(176), and a resistant member(175). The compressors compress refrigerant. The oil separators the oil contained in the refrigerant discharged from the compressors. The oil return pipes returns the separated oil from the oil separators to the compressors. The oil return valves are installed in the oil return pipes, and open and close the oil return pipes, respectively. The resistant member connects the oil return pipes each other.
Patent KR-20120129708-A (KR)
IPC: H04N5/45
Filed: 2011-05-20
Abstract: 본 발명은 반사부를 갖는 멀티 비젼 시스템에 관한 것으로, 화상을 형성하는 화상형성부와, 상기 화상형성부의 모서리에 상기 화상형성부를 둘러싸는 베젤과, 상기 베젤과 결합되어 상기 베젤과 상기 화상형성부를 지지하는 본체를 구비한 디스플레이장치를 복수로 중첩시켜 화상을 형성하는 멀티 비젼 화상부와; 상기 멀티 비젼 화상부 상에서 상기 디스플레이장치의 베젤과 베젤이 중첩되어 화상이 형성되지 않는 사각  영역;을 포함하며, 상기 사각 영역에는 상기 화상형성부에서 형성된 화상이 반사되는 반사부재;가 포함된 것을 특징으로 한다. 
이에, 여러 개의 화상형성부를 갖는 모니터를 중첩시켜 대형의 멀티 비젼 화상부를 형성하는 경우 화상이 형성되지 않는 사각 영역을 간편하게 보정할 수 있다.
Patent KR-20120130982-A (KR)
Title: Liquid crystal display device and method of fabricating thereof
IPC: G02F1/13
Filed: 2011-05-24
Abstract: PURPOSE: A liquid crystal display device and a method for fabricating thereof are provided to prevent the generation of 3D cross talk and to improve an upper and lower view angle. CONSTITUTION: A lenticular lens(364) is formed at a second substrate. A second polarizing plate(340) is adhered to the top of the second substrate. A film patterned retarder(352) is adhered at the upper part of the second polarizing plate. The film patterned retarder is formed on an adhesion layer. The film patterned retarder is adhered to the second polarizing plate.
Patent KR-20120131994-A (KR)
Title: Dry cleaner
IPC: B08B1/00
Filed: 2011-05-27
Abstract: PURPOSE: A dry cleaning apparatus is provided to simply remove foreign materials from a substrate using an ionizer and a roll brush. CONSTITUTION: A dry cleaning apparatus comprises an input unit(10), a first cleaning unit(20), and a discharge unit(50). A substrate(90) is put into the input unit. The first cleaning unit prevents the substrate from being electrified with static electricity and cleans the surface of the substrate. The first cleaning unit comprises a front ionizer and a roll brush. The front ionizer jets ionized air to the substrate. The roll brush cleans the surface of the substrate with the ionized air. The discharge unit discharges the cleaned substrate to the outside.
Patent KR-20120132228-A (KR)
Title: Pipe connection structure for prevention of galvanic corrosion
IPC: F16L58/18
Filed: 2011-05-27
Abstract: PURPOSE: A pipe connection structure for preventing galvanic corrosion is provided to enable the proper connection of a pipe in a narrow engine room by reducing the length of the pipe. CONSTITUTION: A pipe connection structure for preventing galvanic corrosion couples a seawater pipe and a pipe member(14) through a pipe connecting member(16). An earth wire(20) is installed in the pipe connecting member. The pipe connecting member has multiple fastening holes and a tap hole. The fastening holes are formed for flange joint. The earth wire is installed in the tap hole.
Patent KR-20120133169-A (KR)
Title: Apparatus for winding fire fighting hose
IPC: A62C33/04
Filed: 2011-05-30
Abstract: PURPOSE: A fire hose collector is provided to reduce the fatigue of an operator and to shorten working hours. CONSTITUTION: A fire hose collector comprises a power generator(100), a first power transmission unit(200), a second power transmission unit(300), and a winding rod(500). A pedal is formed around a rotary shaft on one side of the power generator. A vertical plate is formed on the other side of the power generator. The first power transmission unit is connected to the vertical plate of the power generator and rotates. The second power transmission unit is connected to the first power transmission unit and transfers rotary power to the second power transmission unit. The winding rod is connected to the second power transmission unit and rotates. The second power transmission unit comprises a third power transmission unit which transfers rotary power in one direction.