baber/WOPTO huggingface dataset:
Patent IT-1258770-B (IT)
Title: Security capsule for sealing a rubber stopper in the neck of a bottle
IPC: B65D/
Filed: 1992-01-15
Granted: 1996-02-27
Abstract: A security capsule 10 for sealing a stopper 30 in the neck 12 of a bottle 14 consists of an essentially cylindrical hollow body which is open at one base and provided at the other with at least one removable strip. It is provided, at least on the perimetric edge 16 of the open base, with a shaped projection 18 whose surface 18b lies on the outer side of the capsule 10 is inclined, thus forming an outwardly flared portion of the capsule 10. The surface 18a of the projection 18 adjacent to the preceding surface extends in an essentially radial direction towards the centre of the said open base. The projection 18 can undergo a limited rotation towards the inner wall of the capsule 10 during its application to the neck 12 of the bottle 14, while its surface 18b is essentially in contact with the lateral surface of the neck 12, and its surface 18a can be engaged under the profile of the neck 12 when its surface 18b is disengaged from this profile when the application of the capsule 10 to the neck 12 of the bottle 14 is completed. <IMAGE>
Patent IT-1269873-B (IT)
Title: New quinolone derivatives, synthesis and use as antibacterial drugs
Inventor: CECCHETTI VIOLETTA
IPC: A61K/
Filed: 1994-05-31
Granted: 1997-04-15
Abstract: New quinolone derivatives having the general formula 1 <IMAGE> where the meaning of R1 and R2 is as defined in the text, suitable for the treatment of bacterial infections.
Patent IT-1249753-B (IT)
Title: Delivery nozzle, particularly for high and low pressure water jets
Inventor: LANDINI ERMINIO
IPC: B08B/
Filed: 1991-01-21
Granted: 1995-03-17
Abstract: Delivery nozzle for water jets, having an internal cylindrical body with an axial duct from which branch out two spaced apart sets of radial ducts between which is placed, on the axial duct, a nozzle to deliver the water at high pressure, annular seals being provided upstream and downstream of each of the said two sets of radial ducts and on the said cylindrical body a sleeve is inserted with an essentially constant nominal internal diameter, except for a central length where the internal diameter of the sleeve is enlarged to form an annular chamber that extends axially as far as necessary since both of the two sets of radial ducts discharge there, there being provided positive differences of the internal diameter with respect to the nominal diameter of between 0 and 0.8 mm that define areas, one downstream with the greater difference, one central with the smaller difference and one upstream with a difference intermediate between the two. <IMAGE>
Patent IT-1254580-B (IT)
Title: Device to control frequency hopping in the synthesiser of radio communications equipment
IPC: H04K/
Filed: 1992-05-18
Granted: 1995-09-28
Abstract: The subject of the invention is a device which, when installed in a system comprising two or more transceivers operating on the same channel, activates a communications link which provides synchronised encoded variations in the frequency of the synthesiser of all the devices in the network. The synchronisation is connected to every individual transmission and it is initiated and shut off directly by operating the PTT button. The possibility is also provided to unblock the synchronisation by intervention of emergency transmissions. A characteristic feature of the present system is also the fact that the synchronism signal is formed by a multitone. <IMAGE>
Patent IT-1262425-B (IT)
Title: Procedimento di regolazione con determinazione cadenzata delle grandezze di regolazione secondo una logica sfumata ("fuzzy").
Inventor: HIRZLE ANTON
IPC: G05B13/02
Filed: 1993-11-08
Granted: 1996-06-19
Abstract: L'invenzione concerne un procedimento di regolazione con determinazione cadenzata di variabili controllate secondo una logica sfumata ("FUZZY").Compito dell'invenzione è quello di migliorare il procedimento di regolazione con determinazione tempificata di variabili controllate secondo una logica sfumata nel senso di consentire una migliore reazione a variazioni delle variabili di entrata. Questo compito viene risolto, secondo l'invenzione, attraverso la determinazione delle variabili di entrata fittizie, probabili, della tempificazione successiva e della considerazione di questo valore durante la determinazione della variabile controllata. Con ciò si deve tener conto di uno sviluppo presunto della variabile di entrata e si agisce corrispondentemente in anticipo sulla variabile controllata. La considerazione è possibile perché i circuiti di regolazione con regolatori Fuzzy non tendono ad un comportamento di risonanza tra la variabile di regolazione e la variabile controllata, come avviene nei sistemi di regolazione classici.
Patent IT-1246077-B (IT)
Title: Quarry sectioning machine for cutting of marble, granite or similar materials
Inventor: FORNASARI OSCAR
IPC: B28D/
Filed: 1991-05-30
Granted: 1994-11-07
Abstract: A quarry sectioning machine for cutting of marble, granite or similar materials comprises a support cart 8, a support structure 9 mounted on cart 8, a flywheel 20 mounted to rotate on support structure 9 and a diamond wire wound in a closed ring and engaged under tension with said flywheel 20.  The machine also includes a fixed base 2 provided with controllable support feet 3 for support on the ground and rail 6 to guide said fixed cart 8 on said base 2 and thus forming an integral part of the machine. Figure 1. <IMAGE>
Patent IT-1257228-B (IT)
Title: Gruppo modulare per l'assemblaggio rigido di una ruota per veicolo.
IPC: B60B25/02
Filed: 1992-06-10
Granted: 1996-01-10
Abstract: Un gruppo per l'assemblaggio rigido di una ruota comprendente separatamente, un pezzo (3) centrale monoblocco che comprende un mozzo (3a) di fissaggio sull'asse del veicolo, una zona intercalare (3b) ed un bordo (3c) periferico il cui profilo interno forma in parte il fondo del cerchio; e due pezzi riportati, l'uno interno e l'altro esterno, sul pezzo centrale (3) monoblocco. Al pezzo (3) centrale monoblocco sono associate almeno una prima serie in due pezzi (7a, 6a) complementari di estensione radiale relativamente piccola, ed una seconda serie di due pezzi (6, 7) complementari di estensione radiale relativamente grande.(fig. 2)
Patent IT-1248164-B (IT)
Title: Domestic machine for preparing espresso coffee commonly known as "crema caffè", using water placed under pressure by a differential plunger
Inventor: DE LUCA COSTANTE
IPC: A47J/
Filed: 1991-05-17
Granted: 1995-01-05
Abstract: Machine for preparing espresso coffee commonly known as "crema caffè" on a domestic scale using water under pressure; it comprises a boiler containing a cylinder in which a plunger slides, the pressure generated by pressing on it acting on the plunger; however, rather than being of the ordinary type, this plunger is of the differential type. The two pistons are fitted with annular seals which ensure leaktightness. The water is heated to boiling point, it is then placed under pressure and pushed towards the filter, passing through the coffee powder and extracting its flavour and flowing on to the dispensing spouts and from there into the cups that have been placed on the heated grille. <IMAGE>
Patent IT-1262055-B (IT)
Inventor: SARO GIANCARLO
IPC: B65B13/18
Filed: 1993-01-29
Granted: 1996-06-19
Abstract: Automatic device for the strapping of rolls of metallic wire, the device advantageously, but not only, being suitable to cooperate with automated systems of the type of IT-83323-A/90 for the packaging of reels and with reels of the type of IT-83321-A/90, the automated system comprising a strapping station with means (22-24-124) to feed a strap and with strapping head means (25), the strapping station including means (16-17-18-19) for the circumferential positioning of the reels (11), means (26-27-28) to convey the strap being comprised in cooperation with, and solidly fixed to, the strapping head means (25) and having a first position to receive and convey the strap, a second position to release and free the strap and a third advanced position to tension, shear and tie the strap. <IMAGE>
Patent IT-1262255-B (IT)
Title: Semi-automatic and thermostatted liquid wax dental technology distributor device
Inventor: BISELLO ALBERTO
IPC: A61C/
Filed: 1993-12-21
Granted: 1996-06-19
Abstract: This patent relates to a semi-automatic and thermostatted dental technology device 5 for liquid wax 9, which is portable and handy, of an ergonomic shape 1 which can be controlled by a single hand, of small dimensions. It is very convenient and fast in dental technical work (particularly in the working of wax or the modelling of dental prostheses), melts the wax and holds it in the liquid state, controls its distribution 4 and its cooling through a gentle flow of air 13 operated under the operator's control. <IMAGE>
Patent IT-1257691-B (IT)
Title: Cassaforma particolarmente per il getto di pilastri, piloni e simili
IPC: E04G/
Filed: 1992-12-15
Granted: 1996-02-01
Abstract: Cassaforma particolarmente per il getto di pilastri, piloni e simili, la quale comprende una guaina tubolare esterna in materiale resistente allo stiramento ed una corazza interna in materiale rigido in grado di mantenere la forma, insediabile nella guaina tubolare esterna e chiudibile su se stessa lungo due lembi longitudinali reciprocamente accostabili.
Patent ME-00130-B (ME)
Title: Solid pharmaceutical dosage form comprising an hiv protease inhibitor solid dispersion
Inventor: ROSENBERG JOEERG
Filed: 2004-08-23
Abstract: A solid pharmaceutical dosage form providing improved oral bioavailability is disclosed for inhibitors of HIV protease. In particular, the dosage form comprises a solid dispersion of at least one HIV protease inhibitor in at least one pharmaceutically acceptable water-soluble polymer and at least one pharmaceutically acceptable surfactant.
Patent MX-170974-B (MX)
Title: Procedimiento para construir una losa rigida en terraplen
Inventor: BRAMI MAX
IPC: E04B1/00
Filed: 1985-06-13
Abstract: La presente invención se refiere a procediento para construir una losa rígida en terralpén, caracterizado en que comprende: formar basamentos puntuales implantados cuando menos en la periferie de la losa que se va a realizar; preparar un suelo plano y nivelado al nivel de esos basamentos puntuales; disponer sobre el suelo preparado de esa manera, elementos de entibado recuperables en periferie de losa que se va a realizar; disponer sobre la superficie de la tierra, dentro de los elementos de entibado periféricos recuperables, hieleras paralelas de elementos de entibado no recuperables que acoplan con la tierra por toda su cara inferior, estas hieleras de elementos de entibado no recuperables están destinados a formar las nervaduras de la losa que se va a formar; disponer entre las hieleras de elementos de distanciamiento en forma de U hecho de un material sellante yde los cuales la cara inferior acoplada con la tierra; disponer un enrejado de armadura de metal sobre la cara superior de los elementos de entibado que no se recupera, para reforzar la losa de piso que se va a formar; y colar hormigón sobre el conjunto realizado de esa manera.
Patent PT-103669-B (PT)
Title: Composição de mistura solúvel para bebida instantânea
Inventor: MATOS PAULO EMANUEL SIMOES REI DA SILVA
IPC: A23F5/44
Filed: 2007-03-02
Abstract: A PRESENTE INVENÇÃO REFERE-SE A UMA COMPOSIÇÃO DE UMA MISTURA SECA E SOLÚVEL PARA BEBIDA INSTANTÂNEA CONSTITUÍDA POR ALFARROBA, SOJA, ERVA-MATE, CASTANHA, BOLOTA E GUARANÁ SENDO UMA BOA ALTERNATIVA AO CAFÉ DE ALTO VALOR NUTRICIONAL. COM VANTAGENS DERIVADAS DA MENOR INTEGRAÇÃO DE CAFEÍNA E AUMENTO DE DIVERSIFICADOS ELEMENTOS NUTRICIONAIS COM FUNÇÕES DIFERENCIADAS QUE MELHORAM O APROVEITAMENTO NUTRICIONAL NA ALIMENTAÇÃO.
Patent PT-107937-B (PT)
Title: Robô móvel de serviço com capacidade de recolha de amostras de solo e biológicas para monitorização ambiental
Inventor: LUÍS MIGUEL BENTES MOITA FLORES
IPC: G05D1/02
Filed: 2014-10-02
Abstract: A PRESENTE INVENÇÃO REFERE-SE A UM ROBÔ MÓVEL DE SERVIÇO COM CARACTERÍSTICAS TODO-O-TERRENO QUE PERMITE O SUPORTE À EXECUÇÃO DE TAREFAS NAS ÁREAS DA MONITORIZAÇÃO AMBIENTAL. O DITO ROBÔ COMPORTA UM REVESTIMENTO EM LIGAS DE ALUMÍNIO E PLÁSTICOS COM BOA RESISTÊNCIA À CORROSÃO PERMITINDO A SUA UTILIZAÇÃO EM AMBIENTES EXTERIORES PRÓXIMOS A REGIÕES DE ÁGUA SALGADA, COMO POR EXEMPLO AMBIENTES ESTUARINOS. A PLATAFORMA MECÂNICA, CORRESPONDENTE AO CONJUNTO CONSTITUÍDO PELA ESTRUTURA DE SUPORTE (14, 15, 16), BLOCOS DE TRANSMISSÃO (11), JANTES (17), PNEUS (18) E MOTORES DE PROPULSÃO (12) E DIREÇÃO (13), APRESENTA NÍVEIS DE ROBUSTEZ E MANOBRABILIDADE ADEQUADOS À NAVEGAÇÃO NÃO APENAS EM TERRENOS SÓLIDOS COMO TAMBÉM EM TERRENOS ARENOSOS OU LAMACENTOS. O ROBÔ PERMITE A RECOLHA DE AMOSTRAS DE SOLO E BIOLÓGICAS PARA POSTERIOR ANÁLISE LABORATORIAL, INCORPORANDO PARA TAL UM SISTEMA INTERMUTÁVEL CONSTITUÍDO POR UM BRAÇO ROBÓTICO ANTROPOMÓRFICO COM PELO MENOS CINCO GRAUS DE LIBERDADE (6), UM APARATO PARA RECOLHA DE AMOSTRAS DE SOLO POR PERFURAÇÃO (5) E UM APARATO PARA RECOLHA DE AMOSTRAS BIOLÓGICAS POR ARRASTO.
Patent PT-109959-B (PT)
Title: Dispositivo para a restrição da circulação de veículos
Inventor: JESUS GONZALEZ GARCIA
IPC: E01F13/02
Filed: 2017-03-10
Abstract: DISPOSITIVO PARA A RESTRIÇÃO DA CIRCULAÇÃO DE VEÍCULOS QUE COMPREENDE: UM POSTE (P) DOTADO DE UM CORPO (1) COM UMA PORÇÃO INFERIOR (11) SUSCEPTÍVEL DE SE ACOPLAR A UMA BASE (B). A BASE (B) COMPREENDE: UM CORPO INFERIOR (2) DOTADO DE UMA CAVIDADE ABERTA SUPERIORMENTE; UMA TAMPA FIXA (3) COM UMA JANELA PARA A INTRODUÇÃO DA PORÇÃO INFERIOR (11) DO CORPO, E UMA FECHADURA (32) DE TRINCO GIRATÓRIO; E UMA TAMPA MÓVEL (4) QUE COMPREENDE: DOIS APÊNDICES QUE FORMAM UM EIXO HORIZONTAL DE ROTAÇÃO DA REFERIDA TAMPA MÓVEL (4) ENTRE UMA POSIÇÃO DE ABERTURA E UMA POSIÇÃO DE FECHAMENTO DA JANELA, E UMA PASSAGEM QUE É DISPOSTA EM FRENTE DA JANELA DA TAMPA FIXA (3) NA POSIÇÃO DE ABERTURA DA TAMPA MÓVEL (4).
Patent PT-116448-B (PT)
Title: Dispositivo de elevação de cestos
Inventor: RICARDO JORGE RAMOS BERNARDES
IPC: B66F9/00
Filed: 2020-06-01
Abstract: A INVENÇÃO DIZ RESPEITO A UM DISPOSITIVO DE ELEVAÇÃO DE CESTOS COM IMPORTÂNCIA PARA O COMÉRCIO A RETALHO, ESTANDO DOTADO DE DOIS OU MAIS BRAÇOS, ESTANDO DOTADO DE UM ATUADOR (23) QUE INTEGRA UM CONETOR, SENDO QUE O CONETOR ENGATA NO BRAÇO OU NOS BRAÇOS INFERIORES, ESTANDO AINDA O DISPOSITIVO DOTADO DE UMA ESTRUTURA (20) E DE UM RECETÁCULO (60); OS BRAÇOS PROMOVEM A LIGAÇÃO ENTRE O RECETÁCULO (60) E A ESTRUTURA (20) E PELO MENOS UM BRAÇO INFERIOR (31) E PELO MENOS UM BRAÇO SUPERIOR (30) ESTÃO DOTADOS, QUER DE EIXO INTERIOR, QUER DE EIXO EXTERIOR, SENDO QUE OS EIXOS INTERIORES DISTAM, NA VERTICAL, UMA MEDIDA X E OS EIXOS EXTERIORES DISTAM, NA VERTICAL, UMA MEDIDA Y, SENDO 1/2X≤ Y ≤3/2X.
Patent RO-83877-B (RO)
Inventor: PALLOS FERENC MARCUS
IPC: C07D333/38
Filed: 1972-04-17
Abstract: Inventia se refera la o compozitie erbicida continînd un antidot care mareste selectivitatea compozitiei fata de plantele cultivate.
Patent TW-221441-B (TW)
IPC: C07D491/056
Filed: 1992-01-21
Granted: 1994-03-01
Abstract: A 4-desoxy-4-epipodophyllotoxin derivative represented by general formula (I), a pharmaceutically acceptable salt thereof, and an antitumor drug containing the same as the active ingredient. In formula (I) R and R1 are as defined in the specification. <CHEM>
Patent TW-199201-B (TW)
Title: Method and apparatus for detecting a current of an air conditioner
Inventor: ISOBE TOMONORI
IPC: F24F11/02
Filed: 1992-07-28
Granted: 1993-02-01
Abstract: The invention provides a current detection method and apparatus for easily detecting the accurate current variation of air conditioner so as to set the power supply cur-off value closer to the tolerable current value in order to improve cooling-warming capability of an air conditioner.
Patent TW-264482-B (TW)
IPC: C08F12/06
Filed: 1992-09-29
Granted: 1995-12-01
Abstract: There is disclosed a process for continuously and efficiently producing a styrenic polymer having a high degree of syndiotactic configuration which comprises effecting polymerization reaction by continuously introducing a styrenic monomer and a polymerization catalyst into a polymerization reactor, the inside of which has been brought into fluidized state by particles previously fed therein, which process is characterized in that the polymerization reactor temperature is controlled by vaporizing a part of the styrenic monomer which has been introduced into the polymerization reactor, while the inside of the reactor is maintained under reduced pressure. According to the above process, such problems as difficulty in polymerization reactor scale-up, adhesion of polymer to the reactor inside and polymer particle agglomerate are simultaneously solved, and thereby the industrial significance of the process is remarkably enhanced. <IMAGE>
Patent TW-221067-B (TW)
Title: A twin axle frame mechanism for door and window
Inventor: CHANG JAU
IPC: E05F1/10
Filed: 1993-05-14
Granted: 1994-02-11
Abstract: A twin axle frame mechanism for door and window consists of the followings. A twin rotation axle assembly, horizontally and vertically symmetrical, is composed of circular shafts, upper and lower guide blocks, upward push blocks, anti-return blocks, return springs, and locking blocks. Supporting mechanisms, composed of frames and movable guide rails, and driving components, composed of sliding blocks, sliding strips, and spring strips, can fasten all components and transmit motions among rotation axles at each corner. The circular shaft is supported in the frame by the upper and the lower guide blocks. The sliding block is encased by the circular shaft and placed between the upper and the lower guide blocks. The return spring is encased by the circular shaft and placed between the upper guide block and the sliding block. The upward push block is devised at the bottom of the return spring and fastened on the circular shaft. The anti-return block is devised at the lower end of the circular shaft. The sliding strip, connected with the sliding block in the frame, can slide on the movable guide rail to drive the sliding block. Every horizontal or vertical sliding strip of the twin rotation axle assembly is connected with each other by the spring strip. When the transmission component moves both the upper and the lower sliding strips in the left (or right) movable guide rail synchronously toward the middle place, and also the upward push block, the return spring then extends to force the circular shaft retracting back into the frame. Due to moving of these sliding strips, the horizontal sliding strips are slided toward the left (or right) by the spring strips, the vertical sliding strips and the sliding blocks at right side are moved outward by those horizontal sliding strips, and then the circular shafts are pushed into the locking slots of the frame. Therefore, these parts of the rotation axle assembly become the rotation axis of the frame.
Patent TW-234807-B (TW)
IPC: H05B39/09
Filed: 1993-10-05
Granted: 1994-11-21
Abstract: The invention relates to a circuit arrangement for operating an incandescent lamp with a current of periodically changing polarity, which circuit arrangement is provided with a static converter (I) with power switching means (T1, T2) and capacitive means (C1, C2) for generating the current of periodically changing polarity. The circuit arrangement also comprises starting means (II) for starting the static converter. According to the invention, the circuit arrangement is provided with delay means (III) which delay the start after connection of a supply source. <IMAGE>
Patent TW-372233-B (TW)
Title: Compounds with a sulphamoyl and amidino group, process for preparing them and pharmaceutical compositions containing them
Inventor: CHRISTOPHE BERNARD
IPC: C07K5/065
Filed: 1994-02-15
Granted: 1999-10-21
Abstract: The subject of the invention is compounds of formula I in which Ar1 represents optionally substituted naphthyl, phenyl, quinolyl or isoquinolyl; Ar2 represents optionally substituted phenyl or thienyl; R1, R2 and R'2 represent, independently of each other, H, (C1-C4)alkyl or R1 represents nothing and N is linked to Ar2 and, optionally, R2 and R'2 form a double bond, or R1 or R2 is linked to Ar2 and represents (C1-C3)alkylene; R3 and R4, which are identical or different, represent H, (C1-C4)alkyl or form with the nitrogen atom to which they are attached a saturated (C5-C7)heterocycle; Z1 represents (C1-C12)alkylene; Q1 represents methyl, amino, (C1-C4)alkoxycarbonylamino, (C1-C4)alkylamino, di(C1-C4)alkylamino, pyrrolidinyl, piperidino, morpholino, piperazinyl, 4-(C1-C4)alkyl piperazinyl, amidino, (C1-C4)alkylamidino, guanidino, (C1-C4)alkylguanidino, pyridyl, imidazolyl, pyrimidinyl, indolyl, hydroxyl, (C1-C4)alkoxy, (C2-C8)alkoxycarbonyl, amino(C1-C4)alkyl-N-(C1-C4)alkylamino, carbamoyl or phenyl which is optionally substituted; Q2 represents H or (C1-C4)alkyl; Q3 represents H or (C1-C4)alkyl or Q1 and Q3 are linked to form a heterocycle and represent together (C2-C3)alkylene whereas Z1 represents nothing, in the form of pure enantiomers or of mixtures thereof in any proportions, as well as their salts with acids. These compounds have an affinity for the biological receptors of neuropeptide Y (NPY) which are present in the central and peripheral nervous systems.
Patent TW-307669-B (TW)
IPC: C07D261/18
Filed: 1994-07-27
Granted: 1997-06-11
Abstract: The invention relates to isoxazole derivatives of formula (I): <CHEM>     wherein:   Ar represents phenyl optionally substituted by from one to three groups and wherein two substituents on adjacent positions of the phenyl ring, together with the two atoms to which they are attached, form a 5- to 7- membered ring which is optionally substituted ;   R represents the hydrogen atom or a group -CO2R<3>; R<1> represents alkyl, haloalkyl or optionally substituted cycloalkyl; R<3> represents alkyl, alkenyl or alkynyl containing up to six carbon atoms which is optionally substituted by one or more halogen atoms; and their use as herbicides.
Patent TW-268993-B (TW)
Title: A control process for automatic fueling by using oil resistance
Inventor: JANG CHII-SHINN
IPC: F02M37/08
Filed: 1995-04-21
Granted: 1996-01-21
Abstract: A control process for automatic fueling by using oil resistance, which comprises installing an air reachable oil resistance valve between the pressurization opening of the muffler and the air conduit of gasoline tank, and a controller of the invention between the gasoline inlet pipe of the gasoline tank and the gasoline barrel; in which the air reachable oil resistance valve is installed with an elastic sealing plate with its surrounding installed with air holes so that during ordinary fueling the air in the gasoline tank can be discharged therefrom for smooth fueling, when the gasoline is full the pressure of oil pushes the elastic sealing plate to attach on the gasoline inlet of the oil resistance valve to stop the gasoline from continue filling; the controller comprises a control circuit and a pump in which the control circuit comprises a D.C. power supply circuit, a voltage stabilization circuit, a switch type voltage adjustment circuit, control keys, a CPU, a differential current detection circuit, a motor positive-and-reverse circuit, a pump motor; in which the switch type voltage adjustment circuit can adjust the resistance R4 to change the voltage in order to adapt to motors with different voltage specification in order to increase the versatility of the controller; the control keys are used to input signals for stop fueling, stop, and drawing gasoline; the differential current detection circuit is a current comparison circuitin order to detect the variation signal of rise or fall of load current of pump motor rotation; the motor positive-and-reverse circuit is comprised of relays which can change the motor into positive or reverse rotation.