baber/WOPTO huggingface dataset:
Patent KR-200493871-Y1 (KR)
IPC: F16C13/00
Filed: 2020-11-10
Granted: 2021-06-18
Abstract: 롤러 지지용 축장치가 제공된다. 축장치는, 원통형 롤러의 말단에 배치되어 롤러를 지지하는 롤러지지용 축장치에 있어서, 외경이 롤러의 내경보다 작지않게 형성되며, 롤러와의 사이가 밀착되게 롤러에 결합하여 고정되는 비금속 재질로 이루어진 회전블록, 일단부에는 롤러의 외측에서 회전블록의 중앙으로 관통되어 롤러의 내측으로 돌출되는 제1축이 형성되고 타단부에는 제1축 반대방향으로 연장되어 롤러 외측으로 돌출되는 제2축이 형성된 축모듈, 및 제1축의 회전블록을 관통하여 돌출된 부분에 결합되며 적어도 일부가 제1축 둘레로 확장되어 회전블록의 축방향 움직임을 제한하는 슬립스토퍼를 포함한다.
Patent KR-200493690-Y1 (KR)
IPC: B01D50/00
Filed: 2020-12-31
Granted: 2021-05-20
Abstract: 개시되는 산업용 집진 시설이 산업용 집진 부재와, 분진 분리탑 부재와, 에어 유동 부재와, 분리 에어 집진 부재와, 분진 처리 장치를 포함함에 따라, 상기 산업용 집진 시설에서 수집된 먼지가 날리지 않으면서 깨끗하게 처리될 수 있게 되는 장점이 있다.
Patent KR-200494979-Y1 (KR)
IPC: F16L15/04
Filed: 2017-06-15
Granted: 2022-02-08
Abstract: 본  고안은,  작업이  익숙하지  않은  사람에  의해서도  나사접속에  의하여  안정된  밀봉성능을  얻을  수  있고,  이에  추가하여  접속부분이  확실하게  체결되어  있다는  것을  용이하게  확인할  수  있는  소화설비배관의  접속구조를  제공한다.  수나사(21)와  암나사(11)의  체결에  의하여  수배관부재(22)와  다구 커플링(T)의  접속구(10)를  접속하는  소화설비배관의  접속구조에  있어서,  수배관부재(22)는,  수나사(21)보다  암배관부재의  내부를  향하여  돌출되어  접속구(10)의  암나사(11)보다  안쪽으로  삽입되는  돌출부(20a)를  갖는  연결통부(20)와,  수나사(21)와  암나사(11)의  체결부를  접속구(10)의  내부에  대하여  지수하는  지수부재(9, 12)를  갖는다.  수배관부재(22)는  단차부(31)를  갖고,  접속구(10)는  단차부(16)를  갖고  있고,  수배관부재(22)와  접속구(10)의  접속상태에서  단차부(31, 16)에  결합하는  인디케이터(32)를  구비하는  것으로  하였다.
Patent KR-200495040-Y1 (KR)
IPC: B24C3/08
Filed: 2021-03-29
Granted: 2022-02-18
Abstract: 본 고안은 원형관 샌드블라스트 장치에 관한 것으로서, 파이프 형태의 원형관에 대한 표면 샌딩작업이 전체적으로 균일하게 이루어질 수 있도록 하여 작업 효율을 향상시킴과 함께 샌딩이 완료된 원형관의 인출이 용이하게 이루어질 수 있도록 하기 위한 것이다. 
이를 실현하기 위한 본 고안의 샌드블라스트 장치는, 장치본체(10)의 내부에 일방향 회동이 이루어지는 다수의 회동롤러(20)가 일정 간격으로 구비되고; 상기 각각의 회동롤러(20)는 구동모터(30)로 부터 구동체인(31)을 통해 회동력을 전달받으며; 상기 회동롤러(20) 상부에는 샌드 분사부(40)가 구성된 것을 특징으로 한다.
Patent KR-200497083-Y1 (KR)
IPC: B66B11/02
Filed: 2021-10-01
Granted: 2023-07-25
Abstract: 조명의 내장이 용이한 덧씌우기용 엘리베이터 카 판넬 몰딩 구조가 제공된다. 엘리베이터의 내벽에 설치되어, 한 쌍의 덧씌우기용 판넬을 연결하는 평면용 몰딩; 및 상기 엘리베이터의 모서리에 배치되어, 제1판넬 및 제2판넬을 수직 방향으로 연결하는 코너용 몰딩;을 포함하고, 상기 평면용 몰딩은, 상기 엘리베이터의 내벽에 부착되고, 상기 덧씌우기용 판넬이 삽입되는 몰딩 본체부;와 상기 몰딩 본체부에 끼워져 상기 몰딩 본체부가 외부로 드러나지 않도록 커버하는 몰딩 캡; 및 상기 몰딩 본체부에 배치되어 빛을 발산하는 조명부;를 포함하는, 엘리베이터 카 판넬 몰딩 구조가 제공될 수 있다.
Patent BR-202016007626-Y1 (BR)
Title: Estrutura evidenciadora de violação para recipientes
Inventor: WANG TONG-CHANG
IPC: B65D55/10
Filed: 2016-04-06
Abstract: estrutura evidenciadora de violação para recipientes. é apresentado um recipiente inviolável para armazenamento de alimentos que usa uma trava de suporte arredondada macho-fêmea em um único canto. depois que a tampa é travada para com a base de bandeja, é necessária a quebra da guia do canto da suporte para abrir o recipiente. esta quebra de guia fornece evidência positiva em relação à abertura do recipiente para assim indicar que o recipiente tenha sido aberto ou adulterado.
Patent BR-202018014371-Y1 (BR)
Title: Conjunto processador de alimentos para liquidificadores
Inventor: CÉSAR EDUARDO ISAACSON BUFFARA
IPC: A47J43/07
Filed: 2018-07-13
Abstract: CONJUNTO PROCESSADOR DE ALIMENTOS PARA LIQUIDIFICADORES. Descreve-se o presente modelo de utilidade como um conjunto processador de alimentos para liquidificadores que, de acordo com as suas características, propicia a formação de um conjunto processador (1) em estrutura própria e específica do tipo mecânica e baseada em uma jarra/copo (B) com fundo (2) em formato hexagonal e uma faca (3) de seis lâminas com angulações aos pares, com vistas a possibilitar de forma extremamente prática, segura e precisa uma completa otimização nos procedimentos de trituração dos liquidificadores (A) sem aumentar a potencia do motor e melhorando a performance e eficiência de trituração dos alimentos, aliado a geração de alivio no funcionamento do motor e das facas (3) e, tendo como base, um conjunto processador (1) com grande resistência, segurança e versatilidade facilmente adaptável a uma vasta gama de liquidificadores (A), al imentos, locais e usuários em geral.
Patent JP-H0115361-Y2 (JP)
IPC: A61B1/00
Filed: 1979-02-10
Granted: 1989-05-09
Abstract: A flexible pipe assembly for an endoscope including a body of flexible material having both hollow grooves with side walls formed in outer wall portions thereof and cylindrical through-holes formed in a central portion of the body both of which extend along the axis of the body. Channel forming pipes are laterally arranged in any of the hollow grooves and cylindrical through-holes. The channel forming pipes may be bundled together to prevent them from being twisted. Various tube members such as multi-purpose tubes having plural channels which can convey air, water and suction as well as optical and electrical conductors may be positioned in the hollow grooves.
Patent JP-2511804-Y2 (JP)
IPC: G04B39/02
Filed: 1992-07-16
Granted: 1996-09-25
Abstract: A wristwatch comprises an outer case having a longitudinal retaining bore. A hollow, generally cylindrical plastic seal is disposed in the bore. The seal includes upper and lower portions, the lower portion being of reduced diameter. The upper portion includes a radial notch and an upper recess disposed above the notch. The lower portion includes a radially inwardly projecting flange and a lower recess disposed below the flange. A watch movement includes a collar which is seated on the flange so as to be radially and longitudinally positioned within the seal. A watch face is disposed above the movement and is mounted in the notch. The watch face engages the watch movement to longitudinally retain the watch movement. A crystal is mounted in the upper recess, and a bottom cover is mounted in the lower recess.
Patent JP-2515835-Y2 (JP)
IPC: E06B3/48
Filed: 1991-06-24
Granted: 1996-10-30
Abstract: A hinge, especially a folding-door hinge, with a hinge arm (6) which can be mounted on a furniture part by means of a baseplate (13). The hinge arm (6) is adjustable on the baseplate (13) in two dimensions and is connected to a hinge pot (8) via at least one pivot axle (10). The end (18) of the hinge arm (6) facing the pivot axle (10) is angled, and mounted at this end (18) is a linearly displaceable extension part (7) which carries the pivot axle (10). <IMAGE>
Patent JP-S609753-Y2 (JP)
IPC: G04C3/00
Filed: 1975-12-29
Granted: 1985-04-05
Abstract: 1525060 Electronic watches DAINI SEIKOSHA KK 22 Dec 1976 [29 Dec 1975] 53535/76 Heading G3T [Also in Division H1] An electrical switch comprises a rotatable cam 8 having a projection 9' engageable with a contact spring 13 and a projection 9 engageable with a cam spring 10, the arrangement being such that when the cam 8 is rotated by drive means 4 the cam spring 10 is flexed by the cam projection 9 and then moves under its own resilience to apply a rotational force to the cam 8 causing the other projection 9' to move the contact spring 13 into contact with a fixed contact 18, 19. The switch is mounted in an electronic watch having an axially movable and rotatable stem 4 mounting a clutch wheel 1 and a freely rotatable pinion 2 which meshes with a transmission wheel 5 rotatably mounted together with the cam 8 on a pin 6. A pin and slot 16, 17 lost motion mechanism is provided between the transmission wheel 5 and cam 8. When the stem 4 is axially moved to drivingly connect it to the clutch wheel 1, the clutch wheel 1 meshes with the pinion 2 whereby rotation of the stem 4 in one direction causes clockwise rotation of the cam 8 after the lost motion 16, 17 has been taken up. The cam projection 9 is moved past a projection 10a of the spring 10 to cause the latter to flex and then impart a rotational force to the cam 8 which causes the other cam projection 9 to move the contact spring 13 relative to a contact 18. If the cam 8 is rotated anti-clockwise by the stem 4, the cam projection 9' engages the cam spring 10 and the cam projection 9 moves the contact spring 13 into engagement with another fixed contact 19. The contacts 18, 19 are connected to circuits which control time correction and resetting.
Patent IT-211917-Z2 (IT)
IPC: B05B11/00
Filed: 1987-07-30
Granted: 1989-05-25
Abstract: The pump comprises a chamber divided into a lower cavity (40) occupied by the fluid and an upper cavity (30) at atmospheric pressure. A flexible ring piston runs in the cahmber and is inserted in a slidable way on a stem valve with which it co-operates to enable or interrupt the outward flow of the fluid. A flange (7) closes the upper part of the pump chamber. The flange (7) has a deformable collar (8, 80) of variable length, turned inwards, which engages with a portion (16) of the stem valve (11) to create an airtight seal.
Patent IT-224371-Z2 (IT)
Title: Foglio prestampato per lettere o similari,fungente anche da busta, presentante mezzi sia di chiusura chedi riapertura
IPC: B42D15/08
Filed: 1991-10-10
Granted: 1996-03-14
Abstract: L'innovazione in oggetto consente di eliminare la necessità che una lettera o similare debba essere imbustata per la sua spedizione, permettendo inoltre che i timbri ed i sigilli postali vengano apposti direttamente sulla missiva.Sostanzialmente detto foglio comprende bande laterali preincollate (3) con linee di preintaglio (5) per il loro distacco, ed una banda superiore anch'essa preincollata.Un filo (7) sotteso sulla parte superiore del foglio consente l'apertura del foglio chiuso, mediante lo strappo del filo stesso prendendolo da una sua estremità posta in corrispondenza di un lembo (9) di individuazione e di presa.
Patent GB-482878-A (GB)
Title: Improvements in or relating to internal feed-water heaters for steam generators
IPC: F22D1/28
Filed: 1938-01-03
Abstract: 482,878. Heating feedwater. McMASTER, E. Jan. 3, 1938, No. 71. [Class 64 (i)] Feedwater is supplied to a direct contact heater 4 in the boiler steam space through a preheating chamber 1 which is surrounded by an open-ended jacket 8 separating the condensate collecting on the chamber from the steam space. The lower parts of the heater and the chamber are immersed in the boiler water, and the feed flows downwards through the heater over removable, inclined, perforated plates 7. Air escapes through a vent 9.
Patent JP-S63171614-A (JP)
Title: Production of filter cloth for solid-liquid separation
Inventor: OTANI MITSUNOBU
IPC: B01D33/04
Filed: 1987-01-05
Abstract: PURPOSE:To obtain a filter cloth adequate for a solid-liquid sepn. device of a traveling filter cloth type, by using felt which is subjected o a special treatment to raise extremely fine fibers on the surface. CONSTITUTION:A polymer such as PVA which has the solvent solubility different from the solvent solubility of the sea and island components of fibers having sea and island type structure is impregnated to the felt formed by interlacing said fibers to once fix the interlaced structure; thereafter, the felt is immersed in a solvent such as trichloroethylene to remove the sea component. After polyurethane of impregnated in such felt and is fixed thereto, The felt is immersed in water to solidify the polyurethane and to wash away the solvent in the polyurethane soln. The polymer for fixing the interlaced structure mentioned above is removed from the felt and after the felt is dried, the surface of the felt if raised by buffing.
Patent DK-22792-A (DK)
Inventor: SOERENSEN SOEREN DANIEL
IPC: A22B5/16
Filed: 1992-02-21
Abstract: An apparatus for cutting open the hind quarters of fur- bearing animals, especially mink, and comprising holding elements 18, displaceable in relation to one another, in which the rear paws of the fur-bearing animal can be clamped for stretching the hind quarters by moving the holding elements 18 away from one another, and a displaceable cutter, 44, which is designed to make a cut in the pelt along the rear of the hind legs from one paw across the hind quarters below the anus of the animal to the other paw, is provided with a first skinning element 46, which is designed to be introduced between the pelt and the ventral side of the animal carcass through the stretched, opened hind quarters, a second cutter element 50, which is designed to cut the anus and any testicles free of the pelt, a further cutter element 54 with holding element 56, which are designed for cutting open the pelt on the tail of the animal, and a second skinning element 64, which is designed to release the opened pelt from the hind legs. This provides an apparatus, which is innovative in that it can also detach the pelt at the hind part of the ventral side, can cut free the anus and any testicles from the pelt, can cut open the pelt on the tail and can detach the pelt from both hind legs. <IMAGE>
Patent DK-39889-A (DK)
Inventor: HALGREEN EDWARD HUGH MCQUISTON
IPC: B65F1/14
Filed: 1989-01-30
Abstract: In an apparatus for sorting household waste at source from multistorey dwellings equipped with rubbish chutes a slide (1) is arranged under the chute discharge (3) and is able to rotate on a vertical shaft (2) to direct waste bags dropped down the chute (3) to a preselected skip among a plurality of skips (13) arranged in a circle under the slide.
Patent DK-48789-A (DK)
Inventor: WILKINS ANNE LILIAN
IPC: A61K8/41
Filed: 1989-02-02
Abstract: A composition for darkening hair comprises a first component, which comprises a shampoo detergent base and at least one metal salt; and a second component which comprises at least one organic compound which, in use changes colour as a consequence of the formation of a dark-coloured complex when mixed with the said metal ion, and a base suitable for use as a hair shampoo, conditioner, tonic, cream, styling gel or mousse such compositions being presented as a multi- compartment device or kit.
Patent EG-14028-A (EG)
Title: Derives de la pyrido(2,1-b)quinozolinone,leur preparation et leur utilisation
IPC: C07D471/04
Filed: 1979-10-18
Granted: 1982-09-30
Abstract: Pyrido[2,1-b]quinazolinones of the formula   <IMAGE>   wherein X is cyano, hydroxyamidocarbonyl, carbamoyl, 5-tetrazolyl, carboxy, carboxy in the form of a salt thereof with a physiologically compatible base, carboxy esterified with a physiologically acceptable alcohol or carboxy amidated with a physiologically acceptable amine; R1 is hydrogen or methyl; and R2 through R5 are independently each hydrogen, halogen, alkyl of 1-4 carbon atoms, trifluoromethyl, carboxy, thiocyano, methylthio, methylsulfinyl, methylsulfonyl, methylsulfonimidoyl or methylsulfonamido with the proviso that two or three of the groups R2 through R5 are hydrogen; or a salt thereof with a physiologically acceptable acid or base; possess valuable pharmacological properties.
Patent FR-1511685-A (FR)
IPC: E01H1/00
Filed: 1967-01-03
Granted: 1968-02-02
Abstract: 1,140,482. Controlling hydrostatic transmissions. HAKO-WERKE HANS KOCH & SOHN. 3 Jan., 1967 [3 Jan., 1966], No. 389/67. Headings F2C and F2D. In an open circuit hydrostatic transmission including an axial piston pump 2, a hydrostatic motor 5, an adjustable throttle valve 7 in the pump suction line 3, and, between the pump and the motor, a reversing slide valve 9 which in a neutral position interconnects the motor forward and reverse drive lines 26, 27, the valves 7, 9 are mechanically coupled to a common adjusting means so that the throttle valve 7 is closed when the reversing valve 9 is in neutral, and the throttle valve 7 is opened simultaneously with the connection of the pump pressure line 4 with the motor forward or reverse drive line 26 or 27. The pump pressure line 4 is provided with a pressure limiting valve 8 discharging to the system sump 1. As shown in Fig. 2, the valves 7, 9 are housed in a block 11 mounted on the sump 1, with their longitudinal axes parallel. Valve 7 comprises a piston 18 slidable in a sleeve 12 having ports 16 communicating with the pump suction line 3. The sleeve 12 opens at one end into the sump 1 and at the other end into a chamber 14 connected by a line 15 to the sump 1, so that movement of the piston 18 in either direction from a central position closing the ports 16 connects the suction line 3 with the sump. A piston rod 40 of the piston 18 is pivoted at 41 to a lever 34 secured to a shaft 35, and springs 42 centre the piston 18 to its closed position. Valve 9 comprises a spool 28, 29 connected by a link 33 to the lever 34 and slidably supported by radial limbs 30 in a sleeve 13 having ports 24, 25 leading to the motor lines 26, 27 respectively, and ports 20a, 20b leading via a gallery 21 to the pump pressure line 4 (Fig. 3, not shown). With the spool in its central, neutral position, a land 19 partly covers ports 20a, 20b and lands 31, 32 are clear of the ends of sleeve 13 so that chamber 14, lines 26, 4, 27, and sump 1 are all interconnected by the valve. Movement of lever 34 clockwise connects line 3 to chamber 14, line 27, via port 25, to sump 1, and line 4, via ports 20a, 24 to line 26, while closing port 20b and the top of sleeve 13. Anticlockwise movement connects line 3 to sump 1, line 26, via port 24, to chamber 14, and line 4, via ports 20b, 25 to line 27, while closing port 20a and the bottom of sleeve 13. In a road vehicle, e.g. a street sweeper, shaft 35 is connected to a pedal (39) (Fig. 5, not shown) rocked forward or backward for forward or reverse drive respectively, with simultaneous throttle valve 7 control.
Patent GB-819649-A (GB)
Title: Process for dyeing cellulosic fibres
IPC: C09B39/00
Filed: 1956-01-02
Abstract: Natural or artificial cellulose fibres are dyed with a trisazo dyestuff of the formula <FORM:0819649/IV (c)/1> wherein one X=H and the other X=SO3H.  The acyl radical may contain a benzene residue carrying a diazotizable amino group in which case diazotization and coupling, e.g. with 1-phenyl-3-methyl-5-pyrazolone, may be effected on the fibre.  The dyestuffs may be prepared by coupling a tetrazo compound of the diamine <FORM:0819649/IV (c)/2> with an oxybenzene-o-carboxylic acid and then with <FORM:0819649/IV (c)/3> the aminoazo dyestuff thus produced being diazotized and coupled with 1-acylamino-8-oxynaphthalene-3 : 6- or 4 : 6-disulphonic acid.
Patent GB-589087-A (GB)
Title: Improvements in or relating to the cementation of metals and alloys
IPC: C23C10/30
Filed: 1945-01-02
Abstract: A composition for coating metals with aluminium or aluminium alloys comprises essentially five to fifty parts by weight of powdered aluminium or aluminium alloy and one part by weight of a flux consisting of one or more chlorides and one or more fluorides in such proportions that the flux is molten at the coating temperature. Alumina may also be incorporated in the composition to an amount such that the powdered metal is two to five times the alumina content. The composition may be suspended in a liquid, e.g., polystyrene in toluol.  The composition of the flux may be 25 per cent. NaCl, 36 per cent. KCl, 20 per cent. LiCl, 6 per cent. SrCl2, 1 per cent. KF, 12 per cent. Cryolite.  The coating may be effected at 500-1000 DEG C. Specification 539,545 is referred to.
Patent GB-921298-A (GB)
Title: Means for suspending a workman's cradle or chair from the roof of a building
IPC: E04G3/34
Filed: 1961-01-03
Abstract: 921,298. Scaffolding cradles. F. T. LIGHTFOOT. Dec. 15, 1961 [Jan. 3, 1961], No. 207/61. Class 20 (2). [Also in Group XXX] A workmen's cradle is suspended from a shackle 5 at the outer end of a beam 1 resting on the roof of a building in an inclined position on a removable transverse member 4 and having a tray 2 at its inner end for counterbalancing weights.
Patent GB-792987-A (GB)
Title: Method of operating industrial furnaces using briquettes, and briquettes therefor
IPC: C22B1/24
Filed: 1955-01-04
Abstract: Briquettes suitable for use in an electric furnace for the production of calcium carbide contain 45 per cent slaked lime, 12 per cent screened lime, 25 per cent anthracite, 11 per cent water and 7 per cent of a binder containing soft pitch, anthracene, naphthalene and redistillate.ALSO:Briquettes, for use in industrial furnaces, comprise metalliferous ore, combustible material and at least 5 per cent but not more than 12 per cent of water which, when the briquette is heated in a furnace, forms steam which acts as a carrier for the particles of tar or pitch condensed in the gas withdrawing zone of the furnace and prevents deposition of the tar or pitch in that zone. The water may be added chemically bonded to a constituent of the briquettes, e.g. as hydrate of lime or magnesia, dolomite or hydrated silicates, or mechanically bonded. Examples are given of briquette compositions containing, iron ore, manganese ore, chromium ore or pyrites with coal, coke, peat or sawdust and, as binder, pitch, anthracene, naphthalene, bitumen &c.
Patent GB-250306-A (GB)
Title: Improvements in or relating to control and indicating apparatus for colliery windinggear and the like
IPC: B66B5/08
Filed: 1925-01-05
Abstract: 250,306. Scott & Hodgson, Ltd., and Burrows, W. Jan. 5, 1925. Index attachments.-The position of a mine cage is indicated by a pointer T on a scale on a disc t'. The shaft carrying the pointer is driven through worm gearing by a shaft B geared to the shaft b<3> of the winding drum.
Patent GB-202579-A (GB)
Title: Improvements in and relating to crows for barless fire-grates
IPC: F24B1/193
Filed: 1923-01-04
Abstract: 202,579. Hesketh, F. Jan. 4, 1923. Supports for articles to be heated. - Barless fire-grates are provided with means on each side cheek for supporting a crow, these means being each a replica of the other and the crow being adapted to be removably hinged to either so that it may be reversed. In the form shown, each side cheek b has cast on it a ledge a with a hook like part c, and a spur d. The crow is formed at one end with a transverse hinge member e in which is a groove e<1> which enables the pin e to be engaged between, or disengaged from, the parts a and d when the crow is raised to the position shown in Fig. 1. In a modification, the crow is provided with a forked lug which engages a hinge-pin carried by the side cheek, and is provided with a screw which prevents disengagement unless slackened off. The crow is preferably mounted on the supports so that it may be moved towards or from the fire.
Patent GB-267648-A (GB)
Title: Improvements in or relating to telephone systems
IPC: H04Q3/00
Filed: 1926-01-07
Abstract: 267,648. Automatic Telephone Manufacturing Co., Ltd., Adams, H., and Sharpe, H. D. Jan. 7, 1926. Automatic exchange systems.- Two arrangements are described for reducing the unguarded interval of a line or switch after it is seized by the preceding switch and at the same time ensuring the saturation of the line relay of the preceding switch before its circuit is cut by the switching relay. In the arrangement shown in Fig. 1, the line relay h of a rotarv switch on energizing closes contacts 5 to energize the relay K in series with the magnet DM when an idle line is reached. The relay K immediately closes contacts X, X<1> to seize the line- and to short-circuit the upper winding of relay K, so that there is a short interval before contacts 8, 9 are closed. When relay L releases,. the relay K becomes quick to release. X<1> may be a make-before-break contact. In a modification, Fig. 2, the line relay L energizes over its upper winding, and when the switch is on an idle line, energizes its lower winding and the relay K in parallel, in series with the magnet DM. The line relay is energized by both windings until the relay K pulls up, when the lower winding of L is short-circuited at 4, so that L is slow to release, and earth is extended to the private wiper P to guard the line. The relays L, K have light contacts 1 and 4, 5 respectively.