baber/WOPTO huggingface dataset:
Patent CN-1230106-A (CN)
Inventor: MULLER JORG
IPC: A61F5/44
Filed: 1997-07-22
Abstract: 本发明为一种具有改进型弹性部件(34)吸湿用品,该弹性部件在制造过程中以及后来对吸湿用品的处理中易于控制。复合的弹性部件(34)包括至少一个挤压弹性层和至少一个挤压的、基本上为非弹性的薄膜层。在薄膜的弹性被激活之前,非弹性层抑制弹性层的弹性性能,而所述抑制弹性的作用在薄膜被激活之后即失去。吸湿用品可以是任何具有弹性部件的吸湿用品,最好是整体的一次性吸湿用品。
Patent CN-1235700-A (CN)
Inventor: MASAMI YASU
IPC: H01L23/13
Filed: 1997-10-29
Abstract: 在本发明的芯片支持基片中,把绝缘性膜状粘接构件帐篷状地贴到布线上边,设有与通气孔相连的空隙。若用该芯片支持基片,则由于不损害通气孔的功能,而且,在软化时从绝缘性膜状粘接构件中发生的气体和水蒸气,还可以确实地放出到封装外边,故可以防止封装产生裂缝,可以制造可靠性高的小型半导体封装。
Patent CN-1231564-A (CN)
Title: 电视用调谐组件
Inventor: SEIKI YAMAMOTO
IPC: H04N5/44
Filed: 1999-01-28
Abstract: 本发明是一种可更容易地对本机振荡频率实施跟踪的电视用调谐组件。它包括使其配置有具有第一变容二极管1b、4b的、可通过它们的容量变化而改变其调谐频率、进而选择出接收信号用的调谐回路1、4,以及具有第二变容二极管6b的、可通过它的容量变化而改变其本机振荡频率的本机振荡器6,从而使施加在第一变容二极管1b、4b两端处的电压小于施加在第二变容二极管6b两端处的电压。
Patent CN-1242530-A (CN)
Title: 全息立体图生成装置和方法
Inventor: KIHARA NOBUHIRO
IPC: G03H1/04
Filed: 1999-07-02
Abstract: 通过在参照光的光路上配置具有对应于全息图元的开口,本发明提供了能够获得较好的图象再现的全息立体图生成装置和方法。
Patent CN-1250703-A (CN)
Title: 夹头装置
Inventor: KAZUO SAKAMAKI
IPC: B23B31/12
Filed: 1999-08-13
Abstract: 本发明涉及设有防松机构的夹头装置,其中,借助设置在一个本体上的旋转螺母的转动,与旋转螺母靠螺纹啮合的爪前、后移动以闭合和打开,工具被爪夹紧。面对旋转螺母的后表面设有一个接纳部分,在接纳部分和旋转螺母之间设有滚动件,旋转螺母的后表面和/或接纳部分的前表面形成向外扩张的斜面,以及当工具被爪夹紧,沿推力方向的紧固反作用力作用在滚动件上时滚动件向外移动而接触的表面形成运动抑制表面,以便抑制所接触的滚动件的运动。
Patent CN-1301383-A (CN)
Title: 光记录载体
Inventor: VANDENENDEN G J
IPC: G11B7/2405
Filed: 1999-03-15
Abstract: 一种光记录载体具有平行的记录道用于以光可检测的标记图案记录信息,该记录道具有控制信息。该记录道被以相邻记录道的配对归组,在一对记录道中的两个记录道的控制信息相同,并且在不同记录道对中记录道的控制信息不同。控制信息的识别减小对相邻记录道的串扰影响。
Patent CN-1324235-A (CN)
Title: 小粒径异维生素a酸的组合物及制备方法
Inventor: AHMED HASHIM A
IPC: A61K9/14
Filed: 1999-10-29
Abstract: 本发明公开了一种制备微粉化的异维生素A酸组合物的方法。该方法是将悬浮于一种油状物载体中的异维生素A酸进行微粉化处理。本发明还公开了微粉化异维生素A酸组合物和含有该组合物的单剂量形式。其中的一些组合物在受到食物效应方面优于现有技术的组合物。
Patent CR-20120402-A (CR)
Title: Bloqueantes de los canales de sodio dependientes de voltaje
Inventor: BOEHM JEFFREY CHARLES
IPC: A61K31/497
Filed: 2012-07-31
Abstract: La presente invención se refiere a intermedios bloqueantes de los canales de sodio dependientes de voltaje, a compuestos y dímeros, a composiciones farmacéuticas correspondientes, a la preparación de compuestos y a métodos de tratamiento para enfermedades respiratorias o del tracto respiratorio.
Patent CR-20160572-A (CR)
Title: Métodos para incrementar el rendimientio del aceite de palma
Inventor: SHAFER WARREN E
IPC: C07C13/04
Filed: 2015-05-11
Abstract: La presente invención se orienta al uso de métodos que utilizan 1-metilciclopropeno (1-MCP) en la fruta de la palma de aceite antes de la cosecha con el objetivo de incrementar la producción de aceite.
Patent CR-20180196-A (CR)
Title: Puertas ecologicos de madera reforestada con tablero de bambu con aislante acústico para producción en serie
Inventor: DARIO LACAYO RUBEN
IPC: E06B5/20
Filed: 2018-04-05
Abstract: LA INVENCION PATENTABLE CONSISTE EN UN PRODUCTO Y EL PROCESO PARA LA OBTENCION DEL PRODUCTO, EL PRODUCTO ES UNA PUERTA ECOLOGICA DE MADERA REFORESTADA CON TABLERO DE BAMBU CON AISLANTE ACUSTICO Y EL PROCESO ESPECIFICO DE PRODUCCION EN SERIE DE LA PUERTA DESCRITA.
Patent CR-20220188-A (CR)
Title: Process for preparation of thiophosphoryl chloride and acephate
Inventor: WANKHADE GOPALRAO ATUL
IPC: C07F9/24
Filed: 2020-10-13
Abstract: The present invention discloses an improved process for preparation of acephate and intermediates thereof. More particularly, the present invention relates to a process for preparation of thiophosphoryl chloride useful for commercial production of pesticides and pharmaceutically active compounds.
Patent EC-SP099354-A (EC)
Title: Inhibidores de cinasa mapk/erk
Inventor: DONG QING
IPC: A61K31/513
Filed: 2009-05-21
Abstract: Se proporcionan compuestos, composiciones farmacéuticas, kits y métodos para uso con MEK, que comprenden un compuesto seleccionado del grupo que consiste de:en donde las variables son como se definen en la presente.
Patent EC-SP951428-A (EC)
Title: Botella plastica con una mejor apariencia de superficie modelada
Inventor: DEEMER DAVID A
IPC: B65D1/02
Filed: 1995-04-21
Abstract: Una botella plástica que tiene un grosor substancialmente uniforme de la pared lateral y que sin embargo, tiene una apariencia modelada, incluyendo la botella una porción de base para sostener la botella sobre un substrato subyacente, una porción de pared lateral que se extiende hacia arriba desde un margen inferior unido a la porción de base hasta un margen superior, una porción de resalto que se extiende desde el margen superior de la porción de la pared lateral hasta una porción de cuello, y una porción de extremo unida a la porción de cuello y adaptada para que en ella se coloque una tapa, incluyendo las porciones de pared lateral y de resalto, o por lo menos una de ellas, varias nervaduras generalmente verticales y espaciadas uniformemente alrededor de una circunferencia de la botella, teniendo cada nervadura generalmente vertical un extremo superior y un extremo inferior, terminando por lo menos uno de los conjuntos de extremos superiores e inferiores de las nervaduras a unaaltura común sobre el recipiente, estando por lo menos uno de los dos extremos superiores e inferiores de las nervaduras unidos entre sí por un conjunto de segmentos de las nervaduras que forman una línea alrededor de la circunferencia de la botella, lo que da a la botella la apariencia de tener una variación substancial en el grosor de la pared lateral.
Patent EC-SP972271-A (EC)
Title: Lactamas e imidas heterociclicas de aralquilo y aralquileno
Inventor: HOWARD HARRY RALPH
IPC: A61K31/39
Filed: 1997-09-29
Abstract: La presente invención se refiere a compuestos de la fórmula (gráfico), en la que R1, R2, R3, X, Y y la linea de trazos son como se han definido en la memoria descriptiva, a intermedios para su preparación a composiciones farmacéuticas que los contienen y a su uso en medicina estos compuestos son útiles como agentes sicoterapéuticos.
Patent FI-20002104-A (FI)
Inventor: SALMISUO MAURI
IPC: B01D1/06
Filed: 2000-09-25
Abstract: An evaporation product discharged from a lower end a falling-film evaporator enters a downpipe (7), makes a 180° turn at a bottom of the downpipe, and moves upward through an annular rising channel (9) defined between the downpipe and an intermediate housing (10). As the evaporation product moves along a spiral path (12) defined by the spiral fins, centrifugal forces urges water droplets and impurities to a radial outward periphery where they pass through openings (13) in the intermediate shell as pure steam continues through the spiral path and out a pure steam outlet (21). A cooling jacket (15) chills a peripheral wall of an outer shell (14) adjacent the holes such that the discharged water droplets condense on the outer shell and flow down a reject water return path to a reject water reservoir at the bottom of the outer shell.
Patent FI-20002800-A (FI)
Inventor: LUMPPIO JUHA
IPC: B22D29/06
Filed: 2000-12-20
Abstract: An arrangement for conveying an anode plate from one location to another, whereby said arrangement comprises gripping elements attached to a conveyor for gripping a plate-like piece. Elements are attached to the gripping element connection for the correction, at least partial, of any possible positional error of the anode to be transferred.
Patent FI-20041439-A (FI)
Inventor: VUORELA ARI
IPC: C08J7/04
Filed: 2004-11-09
Abstract: The invention relates to slip resistant seamless packaging casings and more particularly to slip resistant seamless tubular food casings comprising cellulose or cellulose hydrate and having the surface modified with particles or fibres of food compatible material. The invention also relates to a method for the manufacture of said slip resistant tubular food casing having the surface modified with particles or fibres of food compatible material, and to the use of the obtained slip resistant seamless tubular food casing.
Patent FI-20185394-A (FI)
Inventor: LUNDIN LARS
IPC: E02B/
Filed: 2016-09-30
Abstract: Two segments according to the invention, which form a brush structure created by brush fibres (5a) and plastic rings (1), are joined together by bolts (13) or screws (2) and sleeves (4) with a water-permeable discoid hub (3), in such a way that a separate brush structure can be joined to the segments by stud bolts (11) or similar, to the metal ring (7) of which a plastic ring (Γ), equipped with brush fibres (5b), is attached for the collection of very heavy oils. For the cleaning of the brush fibres of the segment and the good recovery of the oil being collected, there is a curved metal sheet, preferably on supports, as a continuation of the cleaner, and which forms a casing-like space, preventing the oil flowing off the brushes from returning to the water circulation and improving the collection capacity. The device can be used for the collection of all grades of oil, including very heavy oils. The device is suitable, for instance, for the collection of crude oil with continuously changing properties.
Patent FR-1601747-A (FR)
Title: Welding of plastics members by transmitting ultrasonic
IPC: B29C65/08
Filed: 1967-10-18
Granted: 1970-09-14
Abstract: Ultrasonic vibrations are transmitted through a carefully de-gassed liquid and are simultaneously focussed so as to define a focal zone at which the welding occurs, welding occurring through an inter fence between one member and a liquid film. A more accurate focal zone is obtained than with metal horns, and scarring and local distortion is thereby minimised. The vibrations should be in the frequency range 100 K c/s to 10 m.c/s. and can formed from suitable electrostrictive materials. The vibrator can be a domed self-focussing diaphragm having electrical connections thereto and positioned with one face contacting the liquid reservoir. The base of the latter is resilient and transmits the vibrations through a thin liquid film on the top of one of the members being welded.
Patent GB-1051839-A (GB)
IPC: B60Q1/26
Abstract: 1,051,839. Luggage carriers. DAIMLERBENZ A.G. July 14, 1965 [July 15, 1964]. No. 29849/65. Heading B7J. A transparent plastic or metal vehicle roof carrier 1, Figs. 1 and 2, has side flanges 4 and end flanges 7 and is provided with side frames 8 and strengthening plates 9 mounting eyes 10 for securing means 11. Cut-away portions 14 provide access points for straps. In Fig. 3 (not shown) tubes 23 extend outwardly from a reinforced part 22 and are engaged by clamps 26 hooking under gutters 12. A cover 28 may be provided. In Fig. 4 (not shown) feet 34 are provided to support a rail or cover 35. In Figs. 5, 6 and 7 (not shown) the carrier covers an opening in the vehicle roof and the side flanges of the carrier may support internal and external light fittings 42, 43 or air duct fittings 44. In Fig. 7, however, the carrier itself has a roof opening 45 which is closable by a rolling shutter 46.
Patent GB-1052151-A (GB)
IPC: F16B2/24
Abstract: 1,052,151. Clamps. W. SCHNEIDER and R. SCHNEIDER [trading as W. SCHNEIDER & CO], Jan. 14, 1965 [Dec. 2, 1964], No. 1662/65. Heading E2B. A clamp comprises two resilient legs 1, 2 interconnected at one end by a web 3, each leg having an opening or recess 5, 6 to fit on to a stand 13, a bore 11 provided in the web 3 for receiving a pin 10, and a pair of clamp jaws 7, 8 which, when the legs are in a stressed state on the stand as shown and a pin is inserted through the bore in the web, engage the pin under pressure. As shown the jaws 7, 8 are integral with a web 9 secured to the web 3, and the leg 2 has a flange 4 which is engaged by the leg 1 when the legs are pressed together, so that the legs are then substantially parallel. and so easily assembled on, or removed from, the stand 13. In a second embodiment hooked plates form the jaws 7, 8 and these engage the pin 10 from the opposite sides to those shown. The hooked plates have bores through which the pin 10 passes with play. In these two embodiments the legs 1, 2 grip the stand 13 by their tendency to spring apart. In a third embodiment the legs grip the support by their tendency to come together and in this case the jaws are hooks secured to the legs.
Patent GB-1052946-A (GB)
IPC: H03B19/05
Abstract: 1,052,946. Emergency changing. JOSEPH LUCAS (INDUSTRIES) Ltd. Oct. 17, 1963 [Oct. 30, 1962]. No. 40949/62. Heading H2F. A frequency multiplying arrangement comprising an input resonant circuit tuned to a supply frequency and coupled to an output resonant circuit tuned to a harmonic frequency by a varactor diode includes means for varying the resonant frequencies of the resonant circuits. As shown, a varactor diode 15 couples a circuit 11, 12 tuned to the frequency of a source 7 to a circuit 13, 14 tuned to a harmonic frequency- and supplying a load 10, and further varactor diodes 16, 17 are provided to alter the resonant frequencies of the two resonant circuits. Variations in the supply frequency are detected by a frequency detector 24 which supplies direct voltages to the varactor diodes through resistors 22, 23 and inductors 18, 19, to vary the capacitances of the tuned circuits. In a modification (Fig. 3, not shown) a series main varactor diode and parallel resonant circuits are disclosed. Biasing potentials for the diodes are provided by means not shown.
Patent GB-1225095-A (GB)
IPC: B23K7/00
Filed: 1969-02-20
Abstract: 1,225,095. Template followers. MESSER GRIESHEIM G.m.b.H. Feb. 20, 1969 [Feb. 22, 1968], No.9277/69. Heading G3N. A photo-electric scanning has a drive motor for the scanning shaft and a generator for generating a damping voltage, and separate disc rotor dynamo-electric machines are used for the drive motor and for the generator. As shown, an image of line 1 is formed on light receivers 5, 6 by an optical system 4 mounted in a shaft 3 rotating in a bearing 2. The output voltage of the receivers is fed to an amplifier 7 which energizes a disc rotor motor 8 to cause a compensatory rotation of the scanning shaft through sprocket wheels 9, 11 and a cogged belt 10. A disc rotor generator 12, coupled directly to the motor 8, provides a damping signal to the amplifier. A resolver, for providing drive signals for the co-ordinate position controls of a flamecutting machine, is driven by the belt 10 through a sprocket wheel mounted between the sprocket wheels 9, 11.
Patent GB-1229169-A (GB)
IPC: H01R13/646
Filed: 1969-11-11
Abstract: 1.229,169. Electric couplings &c. COMMISSARIAT A L'ENERGIE ATOMIQUE. 11 Nov., 1969 [15 Nov., 1968], No. 55115/69. Heading H2E. A coaxial connector for operation at high temperatures in an oxidizing medium includes hermetically sealed metal bellows 1 containing argon and a small amount of helium, to one end of which a conductor 7 is welded; this is also welded to central wire 5a of a coaxial line. A cup-shaped platinum member 9 is welded to the other end of the bellows and presses against a platinum hemisphere 11 forming the end of conductor 13 which is welded to central wire 5b of a second coaxial line. The conductors 7, 13 are insulated by alumina members 15, 17, from outer conductive sleeves 19, 21 welded to metal tubes 3a, 3b. Platinum washers 23, 25 are welded to the tips of sleeves 19, 21 and are compressed by nut 27. All the non-platinum metal parts are made of stainless steel.
Patent GB-1233726-A (GB)
IPC: F16L33/00
Filed: 1968-11-12
Abstract: 1,233,726. Hose joints. KENLOWE ACCESSORIES & CO. Ltd. 12 Nov., 1969 [12 Nov., 1968], No. 53494/68. Heading F2G. A packing 7 of impervious resilient materia to seal a joint where a capillary tube 5 is introduced between a flexible hose 1 and a rigid spigot 2, comprises two cylindrical surfaces having different but parallel axes such that said surfaces intersect to give "feather" edges 10. A longitudinal groove 11, Figs. 2 and 3 (not shown), or bore (13), houses the capillary tube, and ridges 12 may be provided to enhance the seal. The hose joint is secured by a band clip 3.
Patent GB-1234205-A (GB)
IPC: B01D19/04
Filed: 1967-10-05
Abstract: 1,234,205. Nitrogen-containing siloxane compounds. MIDLAND SILICONES Ltd. 4 Oct., 1968 [5 Oct., 1967], No. 45559/67. Heading C3S. The invention comprises nitrogen-containing siloxane compounds of formula where each R is hydrogen, alkyl, alkenyl or aryl, not more than two R substituents attached to any silicon atom being hydrogen atoms, each R<SP>1</SP> and R<SP>111</SP> is alkyl, alkenyl or aryl, each R<SP>111</SP> is a hydrocarbon radical and n is 0 or 1. The compounds are prepared by reacting a compound of formula (R 3 Si) 2 NSiR<SP>1</SP> 2 (OSiR<SP>11</SP> 2 ) n OH with a compound of formula R<SP>111</SP> 2 Si(NXY) 2  or of formula (R<SP>111</SP> 2 SiNX) P , where X is hydrogen, alkyl or phenyl, Y is alkyl or phenyl and p is 2, 3 or 4, X being alkyl or phenyl when p is 2. In examples, bis-(trimethylsilyl) aminodimethyl silanol is reacted with bis-(methylamino) dimethylsilane to obtain 1,5-bis-[bis-(trimethylsilyl) amino] - 1, 1, 3, 3, 3, 5 - hexamethyl - trisiloxane, and 1 - bis(trimethylsisyl) amino - 1,1,3,3 - tetramethyldisiloxan- 3-ol is reacted with octamethylcyclo tetrasilazane to obtain 1,9-bis-[bis-(trimethylsilyl)- amino] - 1,1,3,3,5,5,7,7,9,9 - decamethylpentasiloxane.
Patent GB-1239201-A (GB)
IPC: F16P3/12
Filed: 1967-08-10
Abstract: 1,239,201. Machinery safety devices. RADIOVISER PARENT Ltd., and G. A.G. IVE. 1 Aug., 1968 [10 Aug., 1967], No. 36709/67. Heading F2J.  A machine guard comprises a pneumatic or hydraulic contact mat 2, on which an operator must stand when in or reaching into a prohibited zone, coupled to fail-safe control means which immobilizes the machine in response to pressure on the mat due to the operator standing thereon, a separate control operation being needed to restart the machine. As shown, a pump 11 supplies air via a filter 10, a pressure regulator 9, and a solenoid valve 8, to a contact mat 2 the outlet of which is connected to a flow meter 1 comprising a transparent vertical tube 4 containing a float 3. Pressure on the mat restricts flow therethrough, so that the float 3 falls past a photo-cell scanner 5, 6 to generate a signal to a control unit 7 which then stops the machine and causes the valve 8 to open to exhaust To reset the machine, a pedal or pushbutton is actuated, this also energizing the valve 8 to allow air to flow through the mat 2 to raise the float 3 and thus reset the control unit 7. Power failure or air leak would cause shut-down of the machine. A checking device may be included, which closes the valve 8 for a short time once per machine operation. If the control unit relay does not respond correctly, the machine is shut down, and a visual or audible warning device actuated. Resetting is by a key retained by a senior person. Similarly, an override key may be used to render the guard inactive for machine setting, a warning lamp being illuminated when this is done. The contact mat may include two plastics sheets sealed together to form a continuous serpentine passage, or a series of interconnected chambers, or a flexible tube may be used. A protective rubber overlay is provided. In Fig. 2 (not shown), the air circuit is replaced by a closed hydraulic circuit. In Fig. 3 (not shown), a static hydraulic system is used, the mat being connected on one hand to a reservoir and on the other to a liquid level gauge having photo-electric or electrical resistance level sensing means. A known photo-electric safety device may be used in conjunction with the contact mat, to sense an operator leaning across the mat.
Patent GB-1250113-A (GB)
IPC: D06N7/00
Filed: 1969-02-05
Abstract: 1,250,113. Laminated fabric. FARBENFABRIKEN BAYER-A.G., and DEUTSCHE BOBINET INDUSTRIE G.m.b.H. 5 Feb., 1969 [24 Feb., 1968], No. 6142/69. Heading B5N. A multi-layer textile floor covering consists of (a) a top layer 1 comprising a warp velourized knitted fabric of polyamide yarns prepared from a face warp and a ground warp in which each loop of the face warp extends over at least 4 wales of the ground warp, (b) an intermediate layer 2 of a vinyl homo- or co-polymer e.g. a vinyl chloride/ vinyl acetate co-polymer or a polyurethane obtained by an isocyanate polyaddition reaction at a temperature of below 100C., and (c) a bottom layer comprising a supporting woven fabric 3 e.g. of jute, sewn to a needled felt 4 having a thickness of from 3 to 7 mm. and a sound absorbing capacity of at least 16 dB, said intermediate layer having been applied as a hardenable fluent coating e.g. by spraying or doctoring to said bottom layer. The top layer is velourized by roughening or cutting. The intermediate layer may contain an adhesive. The felt may consist of natural or synthetic fibres e.g. wool, rayon, cotton, polyamide, polyester or acrylonitrile polymer fibres or mixtures thereof and may be consolidated by an adhesive e.g. a polyacrylate emulsion, adhesive fibres or adhesive granules.
Patent GB-1251563-A (GB)
IPC: H04L25/49
Filed: 1969-09-16
Abstract: 1,251,563. Facsimile transmission systems. GRAPHIC TRANSMISSION SYSTEMS Inc. 16 Sept., 1969 [7 Oct., 1968], No. 45502/69. Headings H4F and H4P. In a facsimile transmission system employing a limited bandwidth transmission channel the signal I from the scanner is fed to a Schmitt trigger which develops signal II. This signal passes to a circuit comprising monostables which develops a binary signal III in which no bit has less than a certain duration. This may entail the loss of some fine detail; e.g. the 4 pulses cII in signal II are represented by only 3 pulses cIII in signal III. Signal III passes to a pair of gates, one incorporating an inverter, the gates being enabled alternately by 1-0 transitions in signal III. The sum of the gates' outputs is signal V which is filtered to provide signal VI, the latter being passed to the channel via a modem. The maximum frequency in signal VI is half the maximum bit frequency in signal III. At the receiver the signal VI is full-wave rectified, the resulting signal VII feeding a Schmitt trigger to develop a signal VII. This signal passes to a circuit which ensures that no 1-bit has less than a given duration in its output signal IX.
Patent GB-1252332-A (GB)
IPC: H04N7/087
Filed: 1969-06-20
Abstract: 1,252,332. Television; multiplex radio signalling. RCA CORPORATION. 20 June 1969 [26 June, 1968], No. 31336/69. Headings H4F and H4L.  In the television system for transmitting and receiving message images in addition to television images as described in Specification 1,132,303, supervisory test signals which may be present in the last three horizontal line spaces of each vertical blanking interval are deleted from the composite signal and replaced by the message line signals which would otherwise have been transmitted in the first three horizontal line spaces after the equalizing pulses in each vertical blanking interval. The supervisory test signals may be deleted from the transmitted signal since they are for network and studio use only, and whereas signals occupying the first three horizontal line spaces after the equalizing pulses in each vertical blanking interval cause undesirable brightness modulation on the vertical retrace lines of receivers incorporating inadequate retrace blanking, signal occupying the last three horizontal line spaces of each vertical blanking interval may be transmitted without undesirably interfering with the reception and reproduction of the television pictures. In the embodiment described above the necessary delay imported to the message line signals is equivalent to eight horizontal line spaces. By varying this delay the message line signals may be relocated anywhere in the vertical blanking interval or in the television raster itself, the shifting being in a coherent or random manner e.g. for secret or subscription-type transmission.