baber/WOPTO huggingface dataset:
Patent GB-1381414-A (GB)
Title: Methods of testing sequential logic circuits
IPC: G06F11/22
Filed: 1973-05-04
Abstract: 1381414 Derivation of test patterns INTERNATIONAL BUSINESS MACHINES CORP 4 May 1973 [24 May 1972] 21223/73 Heading G4A An encoded description of a sequential logic circuit is entered into data processing apparatus which constructs an encoded description of an equivalent combinational circuit (i.e. one having no feedback loops or storage) and derives appropriate test patterns for the equivalent circuit. Fig. 8 shows a combinational circuit equivalent to a sequential circuit which is identical except that input 34 to gate G is by a feedback loop from output line 40. Lines 31 to 33 are designated primary inputs of the sequential circuit and each other line is given a unique designation in the entered encoded description which also contains indications of the type of gate each line leads from (or if the line leads from a fan-out point) and of the gate input lines (or fan-out line), the latter information constituting a predecessor list. The machine is programmed, Fig. 6, to trace back through the predecessor lists over each path from line 40 to primary inputs 31-38 and identifies a loop when a line is encountered which has already been met before. In the example shown a loop is recognized from the sequence Y, 40, 39, 34, 40 and the path is flagged (140) as a feedback loop. Having constructed a tree in this manner to specify the paths between output line 40 and the primary inputs 31-33, a loop cutting routine is entered. In this routine the loops are ordered according to the distance of the start of the loop (in numbers of lines) from output 40, the loops being selected in descending order of distance and " cut " one node away from completion of the loop, i.e. line 34 is cut in the example shown. All other loops which contain line 34 are then deleted from the table and the predecessor list is updated before repeating the process with the next loop. Using the updated predecessor list, a Boolean expression for the circuit is generated in the form then each path from output 40 to an input 31- 34 is traced, e.g. 32-35-37-39-40, and a Boolean differential expression therefor is derived as for example In each case the term is selected which does not include the variable with respect to which the differential was taken, i.e. ACD above, to obtain an appropriate test pattern, i.e. ABCD = 1110; 1010. The process is repeated until all paths have been dealt with. Some paths may be covered by test patterns derived for other paths, and some terms may result in " don't care " values for the test patterns. The table of patterns may thus be reduced, e.g. 00X1 and 0011 reduce to 0011, to a set suitable for fully testing a sequential logic circuit. Lines such as 34 may be physically cut and brought out of the circuit for testing, or a homing sequence, bringing the circuit into a desired state before application of the test pattern, may be used. Specification 1,381,413 is referred to.
Patent GB-222464-A (GB)
Title: Method for synchronizing oscillating pendulums chiefly adapted for time distributionsystems
IPC: G04C13/02
Filed: 1924-09-09
Abstract: 222,464. Etablissements L. Hatot. Sept. 26, 1923, [Convention date]. Electric clocks ; synchronizing hands; pendulums. - In an electromagnetic synchronized time-distributing system, the synchronized pendulums oscillate with very small damping and their mean period is equal to that of the control switch, a second switch being interposed between the supply line and the coil of the magnet secured to the pendulum. Any difference between the period of the synchronizing force and the period of the movement automatically causes a correcting variation in the energy received by the pendulum. The central station comprises a battery S and switch I<1> controlled by the master clock to establish at intervals T electric contacts of duration less than T/2 To each pendulum is secured a magnet A having a coacting coil B connected to the central station, a second switch P being provided, and consisting of a spring strip r entering into contact with the pendulum rod when to the left of the vertical. A member c causes the free length of the spring r to decrease as the pendulum swings away from the vertical, so that the restoring-couple increases at a greater rate than the angle from the vertical. The current supply may be radioelectric.
Patent GB-958366-A (GB)
Title: Improvements in and relating to voltage responsive protective circuits
Inventor: SIMONS DAVID SPENCER
IPC: H02H3/20
Filed: 1960-06-17
Abstract: 958,366. Semi-conductor circuits. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. May 31, 1961 [June 17, 1960], No. 21463/60. Heading H3T. [Also in Division H2] To protect an apparatus (not shown) when two voltage supplies V1, V3, of opposite sign with respect to a datum V2, depart from a predetermined ratio, two transistors E, O have their collectors connected by resistors F, N to one of the voltage supplies V1, their emitters connected to the datum V2 and their bases connected to potential dividers AB and N, Q connected between the voltage supplies V1, V3. Under normal conditions, the potentials at junctions S and T on the dividers are such that transistor E is conducting and transistor O is non-conducting with the result that a third transistor J is conducting and a relay coil H is energized. Should the voltage supplies depart from the predetermined ratio, then both transistors E, O become conducting, or both become non-conducting, and the relay coil H is de-energized. Silicon diodes D.P. may be provided to prevent excessive voltages being applied to the bases of the transistors E, O, and a discharge rectifier G may be connected across the coil H. Specification 931,674 is referred to.
Patent GB-128129-A (GB)
Title: Improvements in Busks or the like.
Inventor: GARDENER WILLIAM WATSON
IPC: B21F43/00
Filed: 1918-12-23
Abstract: 128,129. Gardener, W. W. Dec. 23, 1918. Stiffeners and busks are made of a number of sections a pivoted together. As shown in Fig. 1, each rivet b on one part of the stiffener is formed as a stud, which can engage an eye portion b formed in a projection at the corresponding rivet of the other part of the stiffener. The ends a<2>, a<3> are broadened out, and may be covered with paper, fabric, &c. As shown in Fig. 2, the rivets c form eyelets for the lacing. In Fig. 4, the stiffener is shown formed of links of varying lengths riveted together, and may have either broadened ends or pivoted ends d.
Patent GB-245814-A (GB)
Title: An improved gas washer and scrubber
IPC: B01D47/16
Filed: 1924-09-12
Abstract: 245,814. Blakeley, J. F. Sept. 12, 1924. Scrubbers and washers.-A gas scrubber comprises a number of circular brushes mounted on separate shafts and rotating in contact with one another and the walls of the chamber containing the purifying liquid, the level of which is adjustable by stepped partitions. The gas enters through a pipe c having an angular extension b provided with serrated plates b<2> dipping under the level of the water in a preliminary chamber B, in which soluble impurities are separated. The height of the liquid is kept constant by a pipe d' Fig. 3, which overflows Into a surrounding pipe d<3>. The gases then pass through a series of chambers divided by partitions J, and each provided with three brushes a rotating in contact with each other on axles a<1> the direction of the rotation being reversed automatically by a clutch operated by a weighted lever a. so that the brushes rotate in alternate directions for predetermined periods. The. height of the water in the chamber B is controlled by a valved chain pipe automatically operated by a time arrangement as described in Specificaton 245,972, [Class 135, Valves &c.].
Patent GB-613098-A (GB)
Title: Improved process for the manufacture of composite materials, for example, moulded laminated structures and articles of manufacture produced thereby
IPC: C03C25/34
Filed: 1947-08-07
Abstract: The subject-matter of this Specification is substantially the same as that described in Specification 584,431.
Patent GB-1183981-A (GB)
Title: Recording Method and Apparatus
IPC: G01R17/00
Filed: 1967-05-10
Abstract: 1,183,981. Recording photo-electric measurement signals. TECHNICON CORP. May 10, 1967 [May 31, 1966], No. 21616/67. Headings G1A and G1U. The invention relates to a method and apparatus for recording on a single channel recorder, a sequence of electrical measurement signals, filtered to remove noise. The circuit arrangement which precedes the recorder includes a capacitor switchable between two arrangements of resistors. With the first arrangement, it forms a low time constant circuit enabling it to follow signal variations. With the second it forms a high time constant circuit for filtering the signal from noise. The signals may represent measurements made on a sequence of separate flowing liquid samples treated with reagents and investigated using a photo-electric colorimeter. For example, they may be blood samples, the red and white blood cell counts of which are to be determined. The signals take the form of a series of pulses or plateaus, representing the maximum absorption of the samples, as sensed by the colorimeter, separated by minima, these being the spaces between sequential samples. The use of a fixed high time constant circuit to filter such signals might prevent accurate recording since if the time constant were too long in comparison with the duration of measurement, plateaus, the capacitor in the filter circuit might never charge up to a final voltage representing the plateau (absorption) value. This time lag between changes in input signal level - particularly from minima to maxima and vice versa - is avoided by using a circuit arrangement including a capacitor 62 switchable between two arrangements of resistors e.g. 36, 38, 42 and46, 48, 52, as referred to above. The figure shows an arrangement for recording input signals from two detectors necessitating two short/long time constant channels. In this arrangement, while one channel, e.g. 10, is in the high time constant condition to allow recording of a filtered signal by recorder 14, the other channel 12 is in the low time constant condition and the capacitor 62<SP>1</SP> follows the signal variations at its input. A programming device 80 senses when the input signal has reached its maximum plateau and causes energization of relay 56 and switching over of switches 54M and 74M to connect channel 12 in its high time constant condition, so that filtered signals from this channel are recorded, while channel 10 is switched to its low time constant condition. More than two channels can be provided, for more than two input detector channels at any one time only or being in a high time constant (or filtering) condition (i.e. while recording).
Patent GB-726041-A (GB)
Title: Improvements in and relating to refrigerator apparatus
IPC: F25D11/02
Filed: 1953-08-05
Abstract: 726,041. Refrigerators. GENERAL ELECTRIC CO. Aug. 5, 1953 [Aug. 5, 1952]. No. 21628/53. Class 29. In a refrigerator having a freezing compartment 5 refrigerated by a primary evaporator 7, 9, a relatively warmer storage compartment 16<SP>1</SP> is defined by insulated outer and inner doors 11, 15 and is cooled from compartment 5 by an evaporating - conden - sing system comprising a condenser portion 21 secured to the upper part of the inner wall of the inner door 15, a manually adjustable control valve 23 and an evaporator portion 22 secured to the lower part of the outer wall of the inner door 15. By this arrangement the bottom of compartment 16<SP>1</SP> is colder than the top and the overall temperature can be varied by adjustment of the valve 23. The shelves 19 in the compartment 16<SP>1</SP> are in the form of baskets and are attached to the door 15.
Patent GB-801509-A (GB)
Title: Improvements in and relating to electro-magnetic inductive devices
IPC: H01F29/14
Filed: 1954-07-26
Abstract: 801,509. Transformers and inductors. HOWE, H. June 30, 1955 [July 26, 1954], No. 21712/54. Class 38 (2). [Also in Group XXXIX] An inductive device for controlling a threephase voltage comprises two groups of three spirally wound or other magnetic cores A, B, C; A1, B1, C1; pairs of cores, one from each group bearing series-connected windings P1, P11; P2, P21 ; P3, P31 connected respectively to the phases L1, L2, L3 of the supply. One or other of windings H, H1 linked respectively with the two groups of cores is fed through change-over switch J from D.C. source 7 to saturate the cores of one or other group. With cores A, B, C saturated the output voltage at terminals R, T, V is equal to the input voltage, and with cores A1, B, C saturated the output voltage is zero. Each one of a group may bear a separate biasing winding, connected in series with others of the group, and the output voltage may be derived from secondary windings on cores A, B, C1, Fig. 4 (not shown). Alternatively each group may carry secondary windings connected in series opposition with corresponding windings of the other group, optionally in auto transformer connection with primary windings, and the changeover switch may be replaced by a potentiometer to give continuous change in output voltage, Fig. 5 (not shown). As shown in Fig. 8, each primary and secondary winding may comprise two series-connected halves wound on separate cores of a group, whereby less core material is needed. Each core may be further subdivided, the main windings embracing the subdivisions collectively, Fig. 9 (not shown), or themselves being subdivided, Fig. 10 (not shown). Corresponding cores of different groups may be linked by common main windings, Fig. 11 (not shown). The windings may be connected in delta instead of star, The output voltage may be kept constant by negative feedback. Reference has been directed by the Comptroller to Specifications 742,487 and 742,494.
Patent GB-856404-A (GB)
Title: Improved process of preparing salt-free n-acyl taurines
IPC: C07C309/15
Filed: 1959-06-25
Abstract: N-acyl-taurines are prepared by treating mono-carboxylic acid chlorides containing from 6 to 22 carbon atoms with 2-amino-alkane sulphonic acid salts of formula :  <FORM:0856404/IV(b)/1> where R represents hydrogen or a methyl or ethyl group, R1, hydrogen or a hydrocarbon radical containing from 1 to 20 carbon atoms, and M an alkali metal, at from 0-60 DEG C. in the presence of an inert solvent consisting of acetone, dioxane or methyl ethyl ketone, and may be obtained substantially free from alkali metal chloride. Monocarboxylic acids are listed and include saturated or unsaturated aliphatic, alicyclic or aliphatic-aromatic acids and mixtures of acids derived from a natural plant or animal oils. Examples describe the preparation of N-stearoyl, N-palmitoyl, N-oleoyl and N-tallow acid methyl taurine, N-palmitoly butyl, N-lauroyl octyl, N-eladic hexyl taurines and N-palmitoyl cyclohexyl taurine.
Patent GB-679128-A (GB)
Title: New and useful phenanthridinium salts
IPC: C07D221/12
Filed: 1949-08-23
Abstract: The invention comprises 2 : 7-diamino-9-p-aminophenylphenanthridine and its quaternary salts except when prepared by the process of Specification 635,152.  The product may be obtained by reduction of the corresponding trinitro-compound, acylating or otherwise protecting the amino groups, quaternating, and hydrolysing.  An example is given of the method in which the trinitro compound is reduced, acetylated quaternated with methyl sulphate, and hydrolysed. Specifications 372,859, 511,353, 578,226 and 587,673 also are referred to.
Patent GB-703576-A (GB)
Title: Improvements in and relating to pressure cookers
IPC: A47J27/08
Filed: 1951-09-19
Abstract: 703,576. Pressure cookers. KELLER, H. Sept. 19, 1951 [Sept. 28, 1950; June 27, 1951] No. 22014/51. Class 123(1) The lid 15 of a saucepan 1 is pressed on to the rim 2 of the latter, with the interposition of a sealing ring 12, by a resilient yoke 5 which may be rotatably secured on the 'socket 13 of a safety valve 14 mounted at the centre of said lid. One end of the yoke engages a looped-shaped member 6 on a flexible ring 3 clamped below the rim of the pan, and, preferably, the other end is provided with a handle 10, 11 fitted with a spring pawl 8 adapted to be engaged with a second loop 7 on the ring 3. In a modification, the loops 6, 7 are directly welded or otherwise secured to the pan wall.
Patent GB-961292-A (GB)
Title: Magnetic filter
IPC: B01D35/06
Filed: 1963-05-31
Abstract: 961,292. Magnetic filters. KNECHT G.m.b.H. May 31, 1963 [June 2, 1962], No. 22021/63. Heading B2J. A magnetic filter element 10, concentricallyarranged on a magnetic rod 3, is formed of spaced-apart annular discs of ferromagnetic material, adjacent discs being connected by a rib 11 and the assembly formed by folding one disc upon the other. The magnet 3 has one end connected to a closure member 1 of the filter chamber by a non-magnetic sleeve 2 and the opposite end to a non-magnetic member 5 by a sleeve 4. The member 5 has a threaded portion 7 which receives a clamping plate 9 and wingnut 8.
Patent GB-599379-A (GB)
Title: Improvements in and relating to aluminothermic and like exothermic processes
IPC: B01J19/00
Filed: 1944-11-09
Abstract: In an aluminothermic or like exothermic process for the extraction of metals from metal compounds the formation of sinter slag is prevented by spreading the added portions of the thermic mixture equally over the whole surface of the reacting mass, thereby maintaining the temperature the same value at any point of any given horizontal plane on the surface of or inside the reaction mass.  Such a process is preferably carried out in a melting pot lined with the self binding refractory lining described in Specification 578,165, [Group V].  The application of the invention in the production of ferro-titanium is referred to. Specification 553,568 also is referred to.
Patent GB-1346818-A (GB)
Title: False twist apparatus
IPC: D02G1/08
Filed: 1971-04-19
Abstract: 1346818 False-twisters; crimping yarns and fibres BAYER AG 19 April 1971 [19 Feb 1970] 22033/71 Headings D1D and DIF  Frictional false-twisting apparatus comprises a wear-resistant, e.g. steel or polyurethane, tube 3 supported by bearings 2, rotatably driven by a belt 5 and formed with an annular bead 6 providing a highly polished edge 7, the opening diameter dR being less than the internal diameter dD of the tube. Synthetic, e.g. polyamide, polyester or polyacrylonitrile, yarn or filament(s) 8 having passed through a heating zone then passes through the tube 3 bearing only against the edge 7, Fig. 1 (not shown) or, as shown, bearing additionally on the outlet side against a similar edge 14 provided by a bead 13 screw-threadedly connected to the tube 3. At the one or both ends of the tube the yarn &c. 8 on each side of the edge 7, or edges 7 and 14, encloses an angle of more than 90‹, e.g. 100‹. The two edges roll and falsetwist the yarn &c. in opposite directions and the resultant accumulation and release of running twist in opposite directions in the zone between the edges is utilised to produce highly textured, bulked yarn rotated throughout its length alternately in S- and Z- directions.
Patent GB-1505724-A (GB)
Title: Hay roll forming machine
IPC: A01F15/07
Filed: 1975-05-22
Abstract: 1505724 Hay bale rolling apparatus SPERRY RAND CORP 22 May 1975 [3 June 1974] 22074/75 Heading A1F A mobile machine 10, for forming a roll of crop material, gathers a swath of lying material in a pick-up header unit 56, compresses it to a strip between rollers 64, 66, and then forms the strip into a cylindrical roll between side plates 192, 194 by applying to it a constant pressure whilst it is being coiled between oppositely moving portions of an upper endless flexible apron 82 and a lower endless flexible apron 70 carrying lugs 80. The constant pressure on the roll during its formation results from the increased tension from springs 208 as they extend during expansion of the surface area of the roll. As the roll expands during formation, the lower course of the upper apron 82 between guides 114, 118 is forced upwards, and is increased in length to accommodate the roll by the arms 106, 108 and cam 198 rotating anticlockwise. The maximum roll diameter occurs when the lower course of apron 82 engages the lower edge of an arcuate guide bar 90 which forms part of a frame 30 pivoted at bearing 36. On completion of the roll, the frame 30 is tilted upwardly using a hydraulic cylinder 46. This disconnects the drive to apron 82 by slackening cable 184 and allowing the spring-loaded arm 176 to pivot anticlockwise, which results in the ejection of the roll by the conveying action of the lugs 80 on the lower apron 70.
Patent GB-1256046-A (GB)
Title: Protection relay for three-phase electric motors
Inventor: NICOLAU ALEXANDRU
IPC: H02H3/13
Filed: 1970-05-07
Abstract: 1,256,046. Electromagnetic relays. ROMANIAN MANAGER OF INSTITUTUL DE CERCETARE SI PROIECTARE PENTRU INDUSTRIA ELECTROTEHNICA. 7 May, 1970, No. 22100/70. Heading H1N. [Also in Division H2] A three-phase motor protective relay arrangement comprises three closed ring magnetic cores 1 ... 3 which are normally saturated by the flux produced by windings B 1  . . . B 3  energized by the currents in, or voltages of, the three phases. A short-circuited turn S c  links the three-cores and the core 4 of an electromagnetic relay having an armature AM normally attracted by the flux resulting from the third harmonic current in the short-circuited turn S c  the armature operating contacts C 1 , C 2  controlling the supply to the motor. Should a supply phase fail, then the currents in the windings still energized are in opposition and current ceases to be induced in the turn S c . The armature AM is released and opens contacts C 1 , C 2  to de-energize the operating coil BR of a main contactor I.
Patent GB-729663-A (GB)
Title: Improvements in or relating to on-off recorders
IPC: G07C3/06
Filed: 1952-09-03
Abstract: 729,663. Pens for recording instruments. ROBINSON & PARTNERS, Ltd., F. C., and ROBINSON, F. C. Nov. 16, 1953 [Sept. 3, 1952], No. 22177/52. Class 146(3). [Also in Group XIX] Each pen 15 of an on-off recorder associated with a plurality of machines (see Group XIX) is of sheet metal, having a "point" one sixteenth of an inch square and each pen is rivetted to one end of a spring 38 whose other end is riveted to the armature 39 of an associated electromagnet 31 for controlling its movement to and from a heat sensitive record sheet. Each pen is electrically heated for recording through resistance wire 44 wound on a sheet of mica 43 between two further sheets of mica 42, 45 all held to the pen by a sleeve 46 of aluminium or other metal to which one end of the wire 44 is connected the other end being connected to a copper lead wire 48. A mica washer 49 thermally insulates the pen from the spring 38.