baber/WOPTO huggingface dataset:
Patent GB-1304032-A (GB)
IPC: G02B21/02
Filed: 1970-02-14
Abstract: 1304032 Microscope objective OLYMPUS OPTICAL CO Ltd 14 Feb 1970 7219/70 Heading G2J A microscope objective comprises a first lens component 1, an intermediate lens component 2 and a rear convergent lens component 3, wherein the lens element of the first component 1 adjacent the air gap d 4  on the image side of saidcomponent has a high refractive index and a low index of dispersion with the following conditions nd #1À72, #d#50, the refracting surface r 5  at the object, and the air gap D between the second and third lens components 2, 3 satisfies the inequality 0À7F s D, where F is the focal length of the objective, the said air gap D defining a double concave air lens, and the radius of curvature of the air contacting surface r 2  at the object side of the first component 1 satisfies the inequality 1r 2 1 > d 2 . Optical data for one example is given.
Patent GB-1304870-A (GB)
IPC: A61C19/06
Filed: 1970-10-23
Abstract: 1304870 Mouthguards: applying medicines to the teeth KIRKMAN LABORATORIES Inc 23 Oct 1970 50508/70 Heading A5R A mouthguard adapted to dispense medicine to the teeth comprises a pair of U-shaped troughs 10, 12 preferably of a moulded plastics material, e.g. p.v.c. having outer walls 18, inner walls 16 and end walls 20, joined by two elongate resilient members 22 integral with the outer walls 18. as shown. In use the trough 12 is rotated about the trough 10 bending the members 22 into a generally U-shaped configuration, the U-shape having a thinner portion 23 as apex, and the upper and lower sets of teeth are accommodated in the troughs 10, 12. Inserts of foamed sponge rubber (26), Fig. 4 (not shown) containing a medicant, e.g. fluoride may be placed on the bottom 14 of the the troughs, and the medicant applied to the teeth by a biting action of the user.
Patent GB-1314211-A (GB)
Title: Non-woven fibrous material
IPC: D21H17/34
Filed: 1970-06-17
Abstract: 1314211 Sanitary pads WIGGINS TEAPE RESEARCH & DEVELOPMENT Ltd 14 May 1971 [17 June 1970] 29456/70 Heading A5R [Also in Division D2] Non woven fibrous material is obtained by (i) producing a foamed aqueous suspension of fibres e.g. wood rayon and cellulose acetate fibres (ii) adding to the fibre stock beads of a carboxyl-group containing synthetic polymer (iii) swelling and softening the beads in the stock by treatment of the stock with alkali e.g. NaOH and (iv) producing a sheet from the stock by a wet laying process. In modifications of this process (a) the alkali (step iii) may be added to the stock prior to the beads, and (b) the polymer beads may be added to the stock on the wire of a paper-making machine. Specified polymers are (1) a copolymer of styrene, methyl methacrylate, and acrylic acid (2) a copolymer of butyl acrylate, styrene, methyl methacrylate and acrylic and (3) polymers prepared from such monomers as vinyl esters, crotonic acid, and methacrylic acid. The above material may be used to form a sanitary towel or baby's napkin comprising a padding mass of dispersible liquid absorbent material sandwiched between a layer of the above material and a layer of alkali dispersible liquid impermeable paper-like material.
Patent GB-1314322-A (GB)
Title: Origin-discriminating ca-l systems
IPC: G08B3/10
Filed: 1969-04-14
Abstract: 1314322 Intercommunication systems PLESSEY CO Ltd 13 July 1970 [14 April 1969] 19055/69 Heading H4K The call system described in Specification 1,278,584, which enables a patient in a ward to signal to a nurse at a remote receiver station, is used for establishing at the same time as the nurse call is made, a two way speech communication between a transducer 29 (Fig. 2) at the patient's bedside and a transducer 29 (Fig. 3) at the receiver station. When the patient depresses a call switch S1 to operate contacts S1.1, S1.2 a relay RL1 having contacts RL1.1-RL1.4 is energized by a transistor switch 8. The nurse at the receiver station receives an audible and visual signal as described in Specification 1,278,584 and transmits a telephone query to the patient by speaking into the loudspeaker 29 (Fig. 3) connected to an audio line 25 via an amplifier 28. The patient receives the query via an amplifier 28 (Fig. 2) and the loudspeaker 29 of a radio receiver. The patient answers the query by pressing the switch S1 again to change the contact S1.2 and by speaking into the loudspeaker 29 (Fig. 2), the nurse having depressed a send/receive switch 50 hears the answer through the loudspeaker 29 (Fig. 3).
Patent GB-1328336-A (GB)
Title: Seat belt devices
IPC: B60R22/18
Filed: 1971-02-04
Abstract: 1328336 Buckles VAUXHALL MOTORS Ltd 3 Feb 1972 [4 Feb 1971] 3910/71 Heading E2A  A seat belt device suitable for a motor vehicle comprises two flexible straps 10, 11, Fig. 2, each anchored at one end to the vehicle, a self-supporting elongated member 14 movably secured in an upright plane to a floor anchorage 15, and a buckle 17 with a tongue portion releasably engaged with a locking device 9 at the end of the elongated member 14, the buckle being retained on the straps by each strap passing through one of two slots in the buckle and looping over one of two bar portions of a common movable snubbing element 27, Fig. 3.  As shown, a strap 10, Fig. 2, serving as a lap belt and anchored to the vehicle floor on the remote side of the seat occupant, has its free end threaded through a slot 24 in a buckle 17, Fig. 3, passed around a bar portion 19 of a snubbing element 27, threaded back through the slot and preferably retained on the standing part of the strap by a girdle clip 21, Fig. 2. Similarly, a shoulder and torso belt 11 is anchored to a different point and passed through an anchor loop (not shown) before being passed across the occupants body and then engaged with slot 23 of buckle 17 and bar portion 18 of snubbing element 27. Tongue portion 25 of buckle 17 is bent at an obtuse angle relative to the body portion 22 and is provided with a hole 26 for locking within a locking device 9, Fig. 2, carried on a rigid arm 14 which is pivoted in an upright plane to an anchorage bracket 15. To secure the seat belt device the occupant inserts the tongue portion 25 of buckle 17 into locking device 9 until locking occurs. To tighten a belt the occupant gives the free end a sharp jerk, whereupon the snubbing element 27 moves to clamp, by its respective bar portion, the loop of the belt adjacent its slot in the buckle, as shown in Fig. 5. To lengthen the belts, the occupant holds the buckle 17 at right angles to the belts and then pulls it in the direction away from the belt anchorage points. As shown, slots 23 and 24 converge towards each other at an acute angle but they may be parallel. The buckle may not be bent, in which case it is used with an arm 14 which is either disposed at an obtuse angle to the locking device 9 or is resilient. The body portion 22 of the buckle and the snubbing element 27 may be covered by a plate (e.g. of plastics material) which clips over the body portion.
Patent GB-1328715-A (GB)
Title: Printing device
IPC: B41K1/12
Filed: 1971-07-16
Abstract: 1328715 Hand stamps J W WHEELER 16 July 1971 33469/71 Addition to 1189180 Heading B6D A hand stamp as described in the parent Specification 1,189,180 is modified in that the stamp holding frame 1 is circular and mounted for rotation on a part 14 to bring a selected character stamp 6 opposite an impression aperture 11 and the slot 2 is annular. Moreover, the stamps 6 which are depressed against resilient rubber or plastics pads 5 are guided at opposite ends on ports 20 and the stamps are aligned opposite the aperture 11 by a means (not shown). The stamps may be inked by depression against or brushing past pads 12 or, alternatively, they may be self-inking.
Patent GB-1332609-A (GB)
Title: Braking equipment
IPC: B60T13/66
Filed: 1971-04-27
Abstract: 1332609 Fluid pressure brakes WESTINGHOUSE BRAKE & SIGNAL CO Ltd 20 March 1972 [27 April 1971] 33953/72 Divided out of 1332606 Heading F2F Vehicle braking equipment, particularly for railway vehicles includes an electrodynamic braking system, signal generating means providing a first fluid pressure output the value of which is indicative of the degree of braking effected by the electrodynamic system, a fluid pressure braking system providing a second fluid pressure output indicative of the degree of braking required from the equipment, variable load detection means providing a third fluid pressure output indicative of the load of the vehicle, inhibiting means by which the third output is inhibited and a self-lapping valve controlled by forces exerted by pressure-responsive means to provide from the second fluid pressure a final fluid pressure indicative of the degree of braking to be effected by the fluid pressure system. An electro-pneumatic converter unit 1 has a port 3 connected to the conventional brake pipe and through which the brake pipe pressure is fed through a conduit 4 and filter 5 to a chamber 6 which communicates with an exhaust port 7 and output port 8. A dynamic brake sensor produces on a wire 15 and therefore in the coil 14 of a solenoid 13 an electrical signal in the form of a current the value of which varies in proportion to the dynamic braking to cause an armature 12 to exert on an arm 11 a force to move a throttling member 9 associated with port 7 so that a brake pressure is generated at port 8 indicative of the degree of brake effected by the electrodynamic system. The outlet port 8 constitutes the inlet port to a chamber 20 of a relay valve 21 having an exhaust port 24, an input port 25 connected to conduit 4 and an output port 27 and acting as a self-lapping valve, the arrangement being such that the pressure appearing at output port 27 is dependent on the pressure in chamber 20 and therefore on the degree of braking of the dynamic system. An electro-pneumatic brake application is initiated in the conventional manner and as the vehicle loses speed under the influence of the dynamic braking system the value of the current applied over wire 15 will fall and hence the pressure in chamber 20 and conduit 40 so that there ceases to be a balance of forces across a diaphragm follower 85 of diaphragms 70, 71 and push rods 88, 92 will be moved and a valve 41 operated so that the pneumatic braking system will be operated to a degree replacing the falling off of the dynamic braking system.
Patent GB-1334529-A (GB)
Title: Printing processes
IPC: H04N1/387
Filed: 1970-11-04
Abstract: 1334529 Page composing CROSFIELD ELECTRONICS Ltd 2 Nov 1971 [4 Nov 1970] 52520/70 Heading H4F To compose a page including at least two colour pictures, the colour pictures are scanned one at a time and the resulting analogue colourcomponent signals converted into digital signals which for each picture element in turn are stored on a record medium e.g. a magnetic tape, the signals for the different pictures being recorded on the record medium in positions representative of the relative positions of the pictures on the required page. Thereafter the signals read from the record medium for all the pictures are converted back into analogue form and used to expose a single whole-page separation for each colour component. These separations are then used to prepare printers for the colour components. The alpha-numerical characters which constitute the textual context of the page are stored and used to control a photographic type composing machine to expose the characters on to a black printer separation. Preferably the signals read from the magnetic tape are processed to obtain a further signal from which a whole-page black separation is produced, the other signals (Y, M and C) being modified by the removal of their undercolour components before being used to produce respective separations. Before the digital signals are recorded on the magnetic tape they are preferably stored in a ferrite core store, and by varying the rate at which information is entered into the store relative to the constant read out rate the size of the pictures on the completed page may be controlled. The magnetic tape recorder has a read head preceding the write head in the path of the tape, which arrangement permits a number of editorial functions to be carried out under control of a punched tape programmed digital computer e.g. the combining of two pictures without a gap between them, cropping of the pictures, introduction of tint blocks, or the overlaying of two pictures (code words being recorded on the magnetic tape at positions corresponding to appropriate portions of two opposite boundaries of one of the pictures). To improve the appearance of the quantized picture by breaking the density contour lines a pseudorandom noise signal may be added to the analogue input of the core store and subtracted after reconversion of the digital signals played back from the tape into analogue signals. The colour component signals applied to the separation exposing scanner may be fed via a masking circuit so that lettering insets may be formed or the picture background removed. Alternatively code words from the masking circuit may be recorded on the magnetic tape. The specification refers to the use of a retouching mask (Specification 1,294,191), an "unsharp" signal channel, a catchlight generator (Specification 1,251,217), special colour printer (Specification 1,294,351), and only recording those digits of the digital signals from adjacent picture elements that are different.
Patent GB-1337971-A (GB)
Title: Continuous casting apparatus
IPC: B22D11/047
Filed: 1970-01-07
Abstract: 1337971 Continuous casting ASHMORE BENSON PEASE & CO Ltd 7 Jan 1971 [7 Jan 1970] 798/70 Addition to 1312243 Heading B3F The SiN body of the partent Specification is an apertured plate 4 held in radial compression by a surrounding metal ring 7 cooled by contact with the mould assembly 1, 2. The plate 4 is sealed to the refractory outlet 10 of the tundish 11 by cement and its aperture is smaller than the mould cavity cross-section. The metal plate 7 is a shrink fit on the SiN plate 4 and is bolted to the steel or copper jacket 12 of the copper mould 1 so that the plate 4 is urged against the mould for cooling and sealing. Reference has been directed by the Comptroller to Specification 1,243,778.
Patent GB-1341172-A (GB)
Title: Temperature sensitive oscillator
IPC: G01K7/32
Filed: 1972-03-30
Abstract: 1341172 Measuring temperature electrically STANDARD TELEPHONES & CABLES Ltd 30 March 1972 15070/72 Heading G1N [Also in Division H3] A temperature measuring arrangement includes a temperature sensitive relaxation oscillator circuit having a threshold glass switch 3 which switches to a high resistance state when the current through falls below a certain value and switches to a conductive state when the voltage across it exceeds a critical voltage Vc, connected in parallel with a capacitor 1 charged through resistor 2 from a constant voltage supply (not shown) whereby the amplitude and/or frequency of voltage oscillations is a function of the switch temperature. The arrangement including measuring means responsive to frequency and/or amplitude of the oscillations to generate an output corresponding to switch temperature. The critical voltage Vc varies by between 1% and 5% per degree centigrade. The frequency of the voltage waveform across the switch 3 may be compared with that of a temperature compensated oscillator running at 10 KHz and the resulting beat frequency nullified by adjustment of resistance 2 so that a resistance value corresponding to switch temperature is obtained. Alternatively the peak voltage across the switch is measured.
Patent GB-1345703-A (GB)
Title: Water heaters such as kettles
IPC: F24H9/12
Filed: 1971-04-26
Abstract: 1345703 Kettles BULPITT & SONS Ltd 26 April 1971 [22 April 1970 3 June 1970] 19158/70 and 26696/70 Heading A4A [Also in Division H5] In a water heater or kettle of the type comprising an electric heating element 2 immersed in the water in a container and controlled by a switch responsive to steam conveyed thereto by a duct 3 with an oven end above the water level in the container, a cover part above the open end of the duct restrains water from entering the duct from above. The cover part is constituted by the upper wall 5 of a thimble 4 or 25, which may form a portion of the kettle wall 1, Fig.1, engaging or adjacent the kettle handle 6, or which may be a separate cap 25, Fig.13, surrounded by a protrusion 24 of a removable lid 22. Baffle arrangements provided by the cover parts or additional thereto prevent water splashing up into the duct 3, Figs. 3-10, (not shown). The cover part may alternatively be the curvedover end portion 19, Fig.11, of duct 3.
Patent GB-1348830-A (GB)
Title: Agricultural machine such as a combine harvester comprising  a device for the absorption of shocks in the working part of  the machine and for the reduction of its pressure on soil
IPC: A01D41/14
Filed: 1971-07-09
Abstract: 1348830 Shock absorber for combine header AGROSTROJ PROSTEJOV NARODNI PODNIK 9 July 1971 [9 July 1970] 32441/71 Heading A1F In a combine harvester a header 8 is connected to a crop conveyor 7 pivoted to the main frame at A and raised by a hydraulic ram 3 connected to the main frame at B and to the crop conveyor at C via a lever 4 which is urged rearwardly by adjustable spring 2 connected to the crop conveyor at E, which arrangement balances part of the weight of the header and conveyor and permits movement of the header up and down to follow uneven ground between the limits set by stops 5 and 6 without alteration of the length of ram 3.
Patent GB-1351630-A (GB)
Title: Thermoelectric batteries
IPC: H01L35/28
Filed: 1971-12-20
Abstract: 1351630 Thermoelectric devices UNITED KINGDOM ATOMIC ENERGY AUTHORITY 13 Nov 1972 [20 Dec 1971] 59174/71 Heading HlK A thermoelectric battery has an assembly comprising a heat source, a heat sink and a thermoelectric unit mounted within a casing by means of a resilient arrangement which presses the heat sink against a thermally conductive mass attached to the casing, the adjacent surfaces of the heat sink and the mass being shaped to allow the thermoelectric assembly to rock relative to the casing under the action of acceleration forces. As shown, the assembly comprises a heat source 4 and a heat sink 5 between which extends a thermopile 6. The heat source 4 consists of a casing 17, 18 surrounding a can 16 containing Pu-238. One end of the thermopile 6 is secured to the heat source (via a piece 23 of insulating cloth) and its opposite end is similarly secured to the heat sink 5 which comprises an aluminium alloy disc the upper face of which is frusto-conical with a large vertical angle. The heat sink is pressed against the massive end 7 of the outer casing by means of a prestressed spring 8 via a sleeve 11. The other end of the spring bears against an annular Ta ring 33 which together with tube 34 and disc 25 also of Ta form a radiation shield surrounding the heat source. A rubber buffer ring 30 may surround the heat source or alternatively a ring 31 may be attached to the inside of the casing. The outer casing 2 of the device is of stainless steel and is filled with an inert gas, e.g. Xe. If the device is subjected to lateral acceleration forces sufficient to overcome the prestressing of the spring the heat sink 5 rolls on the end of the casing, motion being limited by the rubber buffer 30 (or 31). When the acceleration force decreases the spring returns the assembly to its initial position this being achieved without overshoot by virtue of the central flat portion of the heat sink top surface. If the acceleration force is in the longitudinal direction and is sufficient to overcome its prestressing the spring is compressed and the heat sink moves away from the end of the housing. The distance A between the end 18 of the heat source and the radiation shield is arranged to be less than the distance B between the edge of the sleeve 11 and a stop 9 on the casing so that longitudinal displacement of the assembly results in an impact which applies a compressive rather than a tensile stress to the thermopile.
Patent GB-1353954-A (GB)
Title: Methods of producing gallium phosphide light emitting diodes
IPC: C30B29/44
Filed: 1971-09-10
Abstract: 1353954 Electroluminescence PLESSEY CO Ltd 4 Sept 1972 [10 Sept 1971] 42291/71 Heading C4S [Also in Division H1] Manufacture of a light emitting diode includes the step of epitaxially growing a layer of nitrogen doped GaP from the vapour phase on a monocrystalline GaP substrate of the same conductivity type, the concentration of nitrogen in the layer being in the range 10<SP>19</SP> to 10<SP>20</SP> atoms/c.c. As described growth is effected in a three zone furnace using an N-type substrate previously etched in a hydrogen chloride/ peroxide mixture. After flushing the furnace with palladium diffused hydrogen and etching the substrate in a flow of hydrogen chloride growth is effected by passing hydrogen chloride over gallium at 750‹ C. in the first zone to produce gallium chloride which mixes at 950‹ C. in the second zone with phosphine, ammonia and hydrogen sulphide and diluent hydrogen and then passes into -the third zone where the substrate is at 840-880‹ C. In an hour a 60-80 Á growth is obtained. After etching in aqua regia zinc is diffused into the layer from zinc phosphide in a two zone closed tube process to produce a PN junction or if the layer is masked with multiple apertured layer of silicon dioxide / nitride / dioxide to produce PN junctions. Subsequently the assembly may be contacted and diced to form individual diodes for mounting on headers with a resin encapsulation dome containing dyestuffs to improve contrast and a refractive index matched with the GaP. Alternative diffusants are cadmium, magnesium and beryllium. The junction may alternatively be formed by epitaxial growth of a further nitrogen and zinc doped layer. Changes of nitrogen concentration controls colour output.
Patent GB-1355056-A (GB)
Title: Manufacture of polymeric pinacols
IPC: C08G61/02
Filed: 1970-10-20
Abstract: 1355056 Polymeric pinacols AGFAGEVAERT 12 Oct 1971 [20 Oct 1970] 49790/70 Heading C3R Polymeric pinacols having recurring units of formula where R is  n being from 1 to 12, are obtained by irradiating with actinic light a solution of a diketone of formula  dissolved in a solvent or solvent mixture comprising a primary or secondary alcohol. In examples polymers are obtained by irradiating 4,4<SP>11</SP> - methylene dibenzophenone, 4,4<SP>11</SP>- hexamethylene dibenzophenone, 4,4<SP>11</SP> - octamethylene dibenzophenone and 4,4<SP>11</SP>-decamethylene dibenzophenone, the materials being dissolved in mixtures of isopropanol with dichloroethane, dichloromethane, chloroform, toluene and benzene.
Patent ID-25496-A (ID)
Inventor: SORVIK BENGT
IPC: A01G7/00
Filed: 1998-04-28
Abstract: A harvesting arrangement (3) is carried by the crane (4) of a vehicle (2) and is adapted to cut a standing tree, lay it down and then drive it through a de-branching arrangement. The log may be cross cut and a position determining device (5) determines the position of the vehicle using global positioning signals from a satellite (6), while a computer-controlled marking device applies markings to pieces of timber obtained from the trees : Independent claims are included for a method of sawing pieces of timber and for a forestry system.
Patent IL-100268-A (IL)
Title: Refrigerant fluid
IPC: F25B9/06
Filed: 1991-12-06
Abstract: The performance of a refrigerant is improved by adding to the refrigerant an additive gas which is inert with respect to the refrigerant and which does not condense under the condensing condition of the refrigerant, in an amount effective to reduce the power required in order to perform the compression step. <IMAGE>