baber/WOPTO huggingface dataset:
Patent GB-1252814-A (GB)
IPC: H03K3/02
Filed: 1969-04-08
Abstract: 1,252,814. Bulk effect semi-conductor circuits. INTERNATIONAL BUSINESS MACHINES CORP. 8 April, 1969 [15 July, 1968], No. 17996/69. Heading H3T. [Also in Division G4] In apparatus including a body 10 of bulk effect material having a velocity field characteristic V(E) with sufficient negative differential mobility to satisfy the condition: where # is the average conductivity of the material, a voltage source B applies a D.C. electric field E b  to the body which is less than the threshold field necessary to nucleate a high field domain in the body and a source of R.F. signals applies an R.F. field E R.F.  to the body, the R.F. field having an angular frequency # such that # G <#<## where ## is the carrier relaxation frequency and # G  is a frequency which permits significant electric field rearrangement to take place in the body during that portion of an R.F. cycle where the total field exceeds the threshold value. As shown radio frequency energy from a magnetron or klystron 74 is applied to a waveguide 72 to energize bulk effect devices 10. A standing wave is produced in the guide due to the short circuited end 73. The devices 10, of which any number can be used, each operate in two stable negative resistance conditions (24, 26, Fig. 4, not shown) so as to operate as a data storage memory. Read out is obtained by applying a signal on word line which by means of a PIN diode switch 76 lowers the RF field in the waveguide. If one or other of the devices 10 is in the "1" state (at 26) a voltage drop is sensed on sense line 77; if in the "0" state (at 24) a voltage increase occurs at sense line 77. Writing is achieved by applying a negative or positive bit to bit line 77 to write in "0" or "1" (at 24, 26) respectively. In a modification the waveguide 72 is terminated in an R.F. load (78, Fig. 8, not shown) so that travelling waves are set up in the waveguide. By feeding an R.F. field to the device a double peaked positive and negative current waveform is produced (Fig. 6, not shown). The device then has an average conductivity defined as the average value of this current over one R.F. cycle divided by the bias voltage E b . The device 10 may be of GaAs. The Specification refers to Patents 1,111,187 and 1,070,261.
Patent GB-1258673-A (GB)
IPC: B23K20/00
Filed: 1969-08-20
Abstract: 1,258,673. Making fibre reinforced metal; welding by pressure. UNITED AIRCRAFT CORP. 20 Aug., 1969 [27 Sept., 1968], No. 41583/69. Headings B3A and B3R. [Also in Division C7] A method of making a metal matrix filament reinforced structural material includes winding a filament under tension on a mandrel, depositing the metal matrix on the filament by plasma arc spraying to encase the filament while maintaining the mandrel against expansion, and thereafter removing the monolayer composite tape so formed from the mandrel. The filament is wound on an aluminium or magnesium foil on the mandrel or it may be wound directly on to the mandrel, which has previously been coated with a die release agent. A plurality of the tapes are formed into a multilayer composite of the desired shape by diffusion bonding together the requisite number of tapes in layers. When bonding tapes comprising boron-coated silicon carbide fibres in aluminium alloy, full compaction is obtained at 600 C. with a pressure of 56À2 kg/cm.<SP>2</SP> and at 550 C. a pressure of 366 kg/cm.<SP>2</SP> is required. For tapes comprising boron fibres in aluminium alloy a pressure of 703 kg/cm.<SP>2</SP> at a temperature of 400 C. is required. Preferably the pressing is performed in an argon atmosphere or in a vacuum. The mandrel contracts thermally and expands mechanically to account for the difference in coefficients of thermal expansion of the fibres and the aluminium.
Patent GB-1265483-A (GB)
IPC: B29C43/30
Filed: 1968-05-15
Abstract: 1,265,483. Embossed laminates. AVIV PLASTICS Ltd. 14 May, 1969 [15 May, 1968], No. 23127/68. Heading B5N. [Also in Division B6]  A laminate is made by placing a coloured sheet 1 (which is preferably translucent) on a differently coloured sheet 2, both sheets being of thermoplastic material, applying pressure by means of a patterned die 7 and heating in the regions 12 beneath the raised portions of the die by high-frequency heating to weld the sheets 1, 2 together; thus at the surface of the sheet 1 the pattern formed by the welds appears a different colour from its surrounds. As shown, the die and a plate 9 form electrodes which are connected to high-frequency generator 10. The die 7 may be a roller or plate, and the plate 9 may be replaced by a roller. A foamed sheet 3 and a sheet 4 of thermoplastic material are optionally present and the sheet 3 may, if coloured, replace sheet 2. Colour combinations for sheets 1, 2 are specified.
Patent GB-1267253-A (GB)
IPC: A01N37/00
Filed: 1969-08-14
Abstract: 1,267,253. Pesticides in admixture. FARBWERKE HOECHST A.G. 14 Aug., 1969 [14 Aug., 1968], No. 40681/69. Heading ASE. A pesticidal preparation comprises (1) 4,6- dinitro - 2 - secondary - butylphenyl dimethylacrylate, 4,6 - dinitro - 2 - secondary - butylphenyl stearate, or 4,6 - dinitro - 2 - secondary - butylphenyl isopropyl carbonate in admixture with (2) 2,4,5,4' - tetrachlorodiphenyl sulphide or 2,4,5,4' - tetrachlorodiphenyl sulphone. The ratio of ingredient (1) to ingredient (2) is preferably 3-7 parts by weight of (1) to 1 part by weight of (2). The pesticidal preparations are advantageously used in the form of a wettable powder containing one or more wetting agents, adhesives, dispersing agents, grinding auxiliaries and solid carrier materials or an emulsifiable concentrate containing one or more additives selected from wetting agents, adhesives, dispersing agents and inert liquids. Preferred wettable powders comprise 10-80% by weight of the active ingredients (1) and (2), 3-10% by weight of the wetting agent and/or dispersing agent the balance being solid inert carrier materials whilst a preferred emulsifiable concentrate comprises 10-70% by weight of the mixture of active ingredients (1) and (2), 5-15% by weight of an additive the balance being an organic solvent. The preparation is particularly effective against spider mites and mildew.
Patent GB-1290306-A (GB)
IPC: G11B5/58
Filed: 1971-05-27
Abstract: 1290306 Magnetic recording and playback MULLARD Ltd 27 May 1971 17533/71 Heading G5R A magnetic recording surface and a bearing surface of a different material rotate together about the same axis, and a magnetic head is resiliently biased towards the recording surface so that a bearing pad mounted with the head is in contact with the bearing surface. As shown, a magnetic drum is clamped between and rotates with two polished steel discs 3 which provide bearing surfaces for pads 5 (of P.T.F.E. containing carbon particles) supporting a magnetic head 8.
Patent GB-1290531-A (GB)
IPC: A47B87/02
Filed: 1969-05-21
Abstract: 1290531 Tables; securing tables in rows MATBURN (HOLDINGS) Ltd 15 May 1970 [21 May 1969] 25929/69 Headings A4H and A4U A rectangular aluminium ribbed platform supported on four legs 1 includes tongues 3, 4 defining locking slots 5 at each end extending along one end and one side thereof so that the legs at a tongueless end or side of a similar unit can be engaged in these slots. The legs may include triangular rubber feet (6) which can engage in triangular depressions 7 at the top of a unit below.
Patent GB-1294981-A (GB)
IPC: H01J61/12
Filed: 1970-02-16
Abstract: 1294981 Metal-vapour lamps WESTING- HOUSE ELECTRIC CORP 16 Feb 1970 [3 March 1969] 7354/70 Addition to 1138913 Heading H1D The metal vapour discharge lamp described in the parent Specification which has tungsten electrodes and a filling consisting essentially of predetermined amounts of mercury, dysprosium, thalluim, iodine and an inert ionizable starting gas is modified in that the filling consists essentially of predetermined amounts of thallium iodide, mercury, mercuric bromide, dysprosuim metal and an inert ionizable gas. Dysprozium bromide formed in operation of the lamp is found to support a tungstenhalogen cycle whereas the dysprozium iodide formed in the lamp of the parent Specification did not support this cycle. Suitable amounts of the filling constituents are given. The starting gas may be argon at a pressure of 20 to 25 torr.
Patent GB-1295632-A (GB)
IPC: G01R31/02
Filed: 1968-08-21
Abstract: 1295632 Detecting hidden masses ELECTRICITY COUNCIL 21 Nov 1969 [21 Aug 1968] 39949/68 Heading G1N [Also in Division H1] Apparatus to detect the position of a ferromagnetic wire embedded in a cable, see Division H1, consists of a magnet 80, Fig. 10 pivoted about an axis parallel to it, fitted with a flywheel 81 so that the magnet does not respond to the A. C. field produced by the cable, and able to touch contacts 88, 87. In the absence of the ferromagnetic wire the magnet is biased by a light spring (93) Fig. 13 (not shown) against contact 87. As the apparatus is rotated about the cable, attraction between the wire and magnet causes contact 87 to open and, while the magnet is balanced between the contacts, the indicator bulb 121 lights, showing that the wire is directly beneath the magnet. The circuit is disclosed in Fig. 15 (not shown).  In a second embodiment, Fig. 3; Figs. 4-6 (not shown) two longitudinally spaced magnets 22 are angularly displaced about the cable circumference, Fig. 6b (not shown) and biased such that only when each is attracted to the ferromagnetic wire when the latter is directly beneath the apparatus will a circuit through the magnets be completed and a lamp energized, Fig. 8 (not shown). The apparatus may be fixed at any one of three positions with respect to a jig, so that, when a given one of the three indicator lamps is energized, the jig is set up for working on a corresponding one of three phase conductors in the cable.
Patent GB-1296606-A (GB)
IPC: B23H7/10
Filed: 1970-12-10
Abstract: 1296606 Spark-erosion G G SEMIN 10 Dec 1970 58797/7 Heading B3V The rotation of a reel 13 from which a spark erosion electrode wire or band 2 is unwound, is stopped if the electrode 2 breaks during operation. During normal operation of the machine, the electrode wire 2 is unwound from the supply reel 13 by a reel 23 driven by a motor 22 which is more powerful than the motor 15 for the reel 13 so as to overcome the tendency for the motor 15 to rotate the reel 13 anticlockwise. If the wire 2 breaks, the driving shaft 14 of the reel 13 can rotate anticlockwise causing a ball 21 to be wedged between the shaft 14 and a surrounding sleeve 17. The sleeve 17 is thereby rotated with the shaft 14 until a projection 18 engages a fixed abutment 19 which prevents further rotation of the reel 13. An electrical circuit is completed when a contact 20 on the projection 18 engages the abutment 19 causing a motor 7 driving the workpiece table 5 to be stopped and the electrode power supply 1 to be disconnected.
Patent GB-1296751-A (GB)
IPC: C01B25/445
Filed: 1970-01-23
Abstract: 1296751 Sodium metaphosphate ALBRIGHT & WILSON Ltd 19 Jan 1971 [23 Jan 1970] 3448/70 Heading C1A Insoluble sodium metaphosphate is prepared by heating a mixture of (A) monosodium orthophosphate or a mixture of a basic sodium compound and a phosphoric acid (Na : P = 1:1) and (B) 10-35% wt. of free water based on the weight of solids in the mixture. "Free water" includes water of crystallization but excludes water of constitution. It is preferred to heat the mixture at 300-400‹ C. and the mixture may include as seed 5-30% wt. of insoluble sodium metaphosphate based on the wt. of component A. Said seed material will preferably pass through a 100 BSS mesh sieve. The mixture of A and B may be pelleted or briquetted prior to heating preferably to have a maximum dimension of “-¢ inch.
Patent GB-1306865-A (GB)
Title: Solvent dewaxing process
IPC: C10G73/34
Filed: 1970-09-01
Abstract: 1306865 Dewaxing oils TEXACO DEVELOPMENT CORP 1 Sept 1970 41839/70 Heading C5E [Also in Divisions B1 and G3]  In a process for solvent dewaxing a lubricating oil stock first, second, third and fourth signals representative of the measured rate of introduction of oil stock; of the measured rate of separation of wax mixture from the process, of the predotermined wax portion for removal, and of the measured amount of solvent entrained in the wax mixture, respectively are used together with a mass balance equation to derive a fifth signal representative of the amount of oil entrained in the wax mixture; this fifth signal is used to control a controllable variable of the dewaxing process which affects the amount of oil entrained in the wax mixture. The controllable variable which is controlled by the fifth signal can be the amount of solvent used to repulp the wax, the amount of solvent used to wash the crystallized wax, or the rate of introduction of lubricating oil stock. An oil feed is mixed with dewaxing solvent 16 comprising a mixture of methyl ethyl ketone and an aromatic hydrocarbon, cooled at 15 with more solvent, filtered at 21 and washed with a stream of solvent 24 to provide a stream 22 comprising the raffinate and solvent and a wax stream 27. The wax stream is repulped with more solvent 28 and filtered at 31 to provide a wax stream 34 and a wash stream 32. Flow meters 13 and 36 measure the rate of input of oil (F1) and the rate of separation of the wax stream 34 (F2). A photometeric analyser 45 is used to measure the methyl ethyl ketone contents (X1) of the wax stream 34 and (a) of the solvent stream 42. The measurements F1, F2, X1 and a are sent, together with a signal (b) representing the predetermined fraction of wax to be removed from the oil, to an analogue computer and control facility which then calculates the amount of oil (Q) in the wax-mix stream from the equation A target value Qt of Q is determined in advance from considerations such as a graph (Fig. 3, not shown) of yield against repulp liquids to solids ratio with the value of Q being determined at the different ratios together with a graph of maximum dewaxed oil capacity of the plant against repulp liquids to solids ratio. The control facility compares the value of Q and Qt and adjusts the amount of solvent used to repulp the wax to bring Q to the target value Qt.
Patent GB-1309168-A (GB)
Title: Semi-rigid rotor systems for rotary wing aircraft
IPC: B64C27/33
Filed: 1970-10-15
Abstract: 1309168 Helicopter rotors WESTLAND AIRCRAFT Ltd 24 Sept 1971 [15 Oct 1970] 49005/70 Heading B7W A semi-rigid helicopter rotor comprises a hub 10 formed integrally with outwardly extending flexure members 11 each offset from the axis of rotation of hub and capable of bending deflections in both a flapping and a leading-lag plane and each terminating in an end portion 16 of sinusoidal form bonded to a bearing support member 23. A blade root 17 is secured by bolts 18 to the outer end of a casing 22 which is supported for pitch-change rotation on member 22 by a stacked bearing assembly 19.
Patent GB-1319958-A (GB)
Title: Pistons
IPC: F16J1/08
Filed: 1969-09-24
Abstract: 1319958 Pistons WELL-WORTHY Ltd 22 Sept 1970 [24 Sept 1969] 47080/69 Heading F2T [Also in Division B3] The skirt 1 of a light alloy piston is formed in its outer surface 3 with a helical groove 2 which has a depth not exceeding substantially 0À0013 inch. The profile of the groove may be symmetrical, Fig. 1, or asymmetrical, Fig. 3, and a sharp corner may be formed at the juncture of its upper part 2a with the surface 3. The groove which is stated to act as an oil reservoir in use, may have a depth and width of approximately 0À001 inch and 0À015 inch respectively and may be continuous or interrupted e.g. at the thrust faces. It may be cut simultaneously with machining the outer contour of the skirt which may taper longitudinally and/or be of oval crosssection.
Patent GB-1322067-A (GB)
Title: Hydraulic motor
IPC: F03C1/24
Filed: 1970-07-15
Abstract: 1322067 Reciprocating hydraulic motors G M BARRETT 15 July 1970 34262/70 Heading F1A An hydraulic motor especially for driving a pulley or a vehicle wheel, comprises an annular rotary cylinder block 17 having at least one row of radial cylinders 27, each cylinder containing a ball piston 40 which engages a multi-lobed internal track on a stator part 18. The block 17 rotates on a stator 16 having axially extending ports 31 on its peripheral surface, alternate ports being permanently connected to a fixed inlet 36 and the intervening ports being permanently connected to a fixed outlet 37. Thus as the block 17 rotates, the inner end of each cylinder alternately communicates with a pressurized and de-pressurized port 31. A plate 21 secured by screws 41 to the block 17 acts as the output member, a seal 43 being disposed between the plate and a stator end plate 20. Hydraulic fluid escapes through the radial and end clearances between the block and stator, thereby to provide hydrostatic bearings.
Patent GB-1323062-A (GB)
Title: Dynamo-electric machines
IPC: H02K19/26
Filed: 1969-07-16
Abstract: 1323062 Dynamo-electric machine windings C A PARSONS & CO Ltd 8 July 1970 [16 July 1969] 35881/69 Heading H2A In a dynamo-electric machine rotor having concentric-type windings formed by coils Aa-Ad, Ba-Bd, Fig. 4, lying in slots in a rotor core, the radial depth of those portions (as Bb 3 α-Bb 3 #, Fig. 7) of each coil conductor which constitute the end turns is less than the radial depth of the slot embedded portions Bb 1 α-Bb 1 #, and the end turns of two different coils radially overly one another, as for coils Ab, Bb in Fig. 7, or are radially interleaved (Figs. 9, 10, not shown). Preferably the conductor is made flatter and wider over its end turn portions so that its cross-sectional area is unchanged. In the winding layout of Fig. 4 for a D.C. excited rotor there are two separately-excited winding sections, denoted by prefixes A and B respectively. Each section provides two poles NA, SA and NB, SB respectively and, by altering the relative excitations of the two sections the positions of the resultant poles N and S may be varied. The two sections may occupy unequal numbers of slots.
Patent GB-1324079-A (GB)
Title: Freewheel lockout
IPC: F16D25/061
Filed: 1970-11-09
Abstract: 1324079 Freewheel clutches MASSEYFERGUSON-PERKINS Ltd 9 Nov 1970 [4 Dec 1969] 59204/69 Heading F2C A freewheel clutch comprises dog teeth 9 on a driving gear 1 and engaging dog teeth 10 on a coupling member 6 having a helical spline connection 7, 8 with a driven shaft 4 to allow overrunning, a second coupling member 11, having a straight spline connection 12, 13 with shaft 4 being urged by a spring 22 to engage teeth 14 thereon with teeth 15 on member 6 to prevent rotation of member 6 relative to shaft 4, and hence axial withdrawal, and thus to prevent overrun. The member 11 may be withdrawn axially against the spring force hydraulically.
Patent GB-1324963-A (GB)
Title: Multipurpose article of furniture
IPC: A47B87/00
Filed: 1972-01-19
Abstract: 1324963 Multi-purpose furniture: connecting furniture articles; castors ALBAPLAST SpA 19 Jan 1972 2496/72 Headings A4H, A4U [Also in Division B8] An article of furniture comprises a plastics box-shaped body 1 having a base 5, walls 3, the upper edges 4 of which slant downwardly, and outwardly and a removable lid 9 whose perimeter 10 is bevelled so as to mate with edges 4, the base 5 including bushings 6 for removably mounting castors 8. The castors 8 are mounted to the bushings 6 by removable pivot pins 7. Alternatively, pin 7 may be rigidly connected to bushing 6 or castor 8. At least two articles may be pivotally linked by replacing a castor of each by a hollow U-shaped member 15. Lid 9 may mount a seat cushion.
Patent GB-1325219-A (GB)
Title: Variable frequency oscillator systems
IPC: H03L7/18
Filed: 1971-10-01
Abstract: 1325219 Automatic frequency control MULLARD Ltd 1 Oct 1971 45815/71 Heading H3A An a.f.c. signal for a variable frequency oscillator 1 is derived from a phase comparator 3 connected between the input and output of a, for example acoustic, delay 2 which is fed with a signal derived from the oscillator and means are provided to adjust the frequency to which the oscillator locks. The system will lock to one of a number of harmonically related frequencies, the adjustment between them being made by a manually adjustable error offset R. As described with reference to Fig. 2 the oscillator output is frequency divided by 6 before being applied to the delay line and comparator, a number of phase displaced outputs being derived from the divider. Frequency jumps from one harmonic to the next may be obtained by connecting the delay to different ones of these outputs. Alternatively, not shown, the signal may be frequency multiplied. In another embodiment Fig. 5 (not shown), the delay is fed with the output frequency from the oscillator, and two dividers (6A, 6B) are included in the input leads to the comparator. In a further embodiment, Fig. 1 (not shown) neither dividers nor multipliers are used and the frequency jumps are produced by combining pulses from a source (5) with the control signal.
Patent GB-1329091-A (GB)
Title: Arrangements including image intensifier devices
IPC: H01J31/50
Filed: 1969-11-10
Abstract: 1329091 Image intensifier arrangement EMI Ltd 9 Nov 1970 [19 Nov 1969] 56531/69 Heading H4F [Also in Divisions G1 and H1] Intensification and display of selected events of short duration or of events of a preselected energy level e.g., in gamma ray imaging, is effected by means of a multistage intensifier so controlled that during a first period the first stage is operative and the second stage is inoperative, and upon the occurrence of an event having a desired characteristic the first stage is switched to be inoperative and the second stage is switched to be operative. In a first embodiment a 4-stage image intensifier tube is used, Fig. 1, having input and output windows 1 and 3 respectively supporting a photo-cathode layer 5 and a phosphor layer 7, intensifying electrodes D1 to D3 each comprising a phosphor layer and a photo-cathode layer, and ring focusing electrodes 8 to 15. With the potentials indicated in Fig. 2c applied to the electrodes the tube operates in a "receive only'" mode i.e., only the first stage is operative the image received by the phosphor of D1 being stored but not transmitted (storage period depends on material of phosphor e.g., titaniumactivated zinc silicate has a storage period of 5Á sec). With the potentials indicated in Fig. 2d applied to the electrodes the tube operates in the "transmission mode" i.e., the first stage is inoperative and the remaining stages simultaneously operative. Thus only the potentials applied to electrodes 8. 9 and D1 need to be varied and this is effected by pulsing techniques. The potentials for the electrodes are derived as shown in Figure 1 and to change the potentials on electrodes 8, 9 and D1 triggering signals are applied to input terminals A and B from a monitoring device M upon the occurrence of an event of interest. The monitoring device may comprise a photomultiplier associated with a pulse height analyser. Alternatively if the times of the events are known, a pulse generator operating at appropriate times may be employed (storage period of the phosphor layer of electrode D1 determines the maximum repetition rate which can be employed). The pulsing circuit comprises a pentode V1 in a common cathode stage which drives a cathode follower V2 which is directly coupled to the control grid of a pulse tetrode V3. Electrodes D2 and/or D3 may be replaced by secondary electron emissive type electrodes. The displayed images on phosphor layer 7 may be photographed.  In a second embodiment (Fig. 3, not shown) the electrode D2 and subsequent electrodes are replaced by the target of a television camera tube which is scanned by an electron beam. The target may comprise a material which exhibits electron bombardment induced conductivity, secondary electron conduction, or it may comprise an array of semi-conductor diodes.