baber/WOPTO huggingface dataset:
Patent GB-1330587-A (GB)
Title: Particle size analyzing apparatus and method using threshold level control
IPC: G01N15/12
Filed: 1971-04-19
Abstract: 1330587 Measuring particulate systems electrically COULTER ELECTRONICS LTD 19 April 1971 [ 25 May 1970] 22546/71 Heading G1N [ Also in Division H3] In order to ascertain the total volume of particulate matter in a measure of a suspension thereof electrical signals, each having an amplitude proportional to the size (volume) of a respective particle are converted into an electrical quantity capable of being accumulated without regard to the duration of the pulse. After accumulating the electrical quantities a signal proportional to the total accumulated electrical quantities and hence proportional to the total volume is derived. The analogue electrical signals produced by the passage of particles through an aperture in a transducer of the Coulter type is applied via an electronic switch 22 to a pump circuit 42, for details see Division H3, Figs. 3, 4 (not shown). Threshold level comparator 20 controlling electronic switch 22 permits pulses on line 16 to pass to the pump circuit 42 only if their amplitudes exceed the level e th , Fig.2A, set by circuit 26. Thus for the pulses e.g. 22 switch 22 is opened only at time t 1  by pulse 36, Fig.2B, from comparator 20 and from time t 1  to t P  the capacitor of the pumping circuit charges to the maximum amplitude  e max  of the pulse 22. From time t P  to t 2  the capacitor discharges into integrator 44 which accumulates the charge with other charges previously and subsequently stored. After a given length of time the accumulated charge in the integrator 44 will be proportional to the total volume of all particles of amplitude greater than e th  which were produced during that time. To determine MCV of BLOOD switch 60 is placed in the MCV position so that the output of binary counter 52 is connected via phase invertor 56 to the input of AND gate connected between comparator 20 and switch 22, the input to the counter being taken from 36 when the counter is filled the output therefrom disables gate 38 and stops charge being accumulated in integrator 46. To determine HEMATOCRIT switch 60 is placed in the HCT position so that logic circuit 72 is connected to the gate 38 so as to enable and disable the gate 38 at the beginning and end of the passage of a given volume of liquid through the aperture of transducer 10. A plurality of channels each having a different threshold level and including an accumulating circuit may be connected in parallel to the output of amplifier 14, Fig.5 (not shown) A multiposition switch and differential amplifier enables the differential curve corresponding to particle size and distribution to be plotted.
Patent GB-270943-A (GB)
Title: Improvements in signal systems for hotels
IPC: G04C21/32
Filed: 1926-09-14
Abstract: 270,943. Schenk, C. Sept. 14, 1926. Time alarms.-In a signalling system for hotels of the type employing a drum to carry pins by which contacts are closed at predetermined times, the drum 1 is loosely mounted on a driving shaft 4 and is brought into correct signalling position by a spring 19, so that the drum may be turned for the insertion of the pins 31. Stops 17, 18 co-act to determine the position of the drum. The pins are inserted through holes in a bar 23 and may be screwed into the drum by a key. A pin 25 may be pushed into a hole in the drum to hold it stationary. Each pair of contact arms 43, 44 is pivoted on a rod 41, and the pairs may be held individually or collectively out of the path of the pins by springs 47, 52 respectively. The indicator circuit is shown in Fig. 7. When a pair of contacts is closed, a room bell 57 is operated and an indicator 66 is released in the office to show that the signal has been given. The occupant answers the signal by closing a switch 70 to ring a bell 72 and release an indicator 61 in the office. The release of this indicator breaks contact 65 to stop the bell 57 ringing. The switch 70 may be used for individual signals from the room to the office, a switch 76 giving an answering signal.
Patent GB-240152-A (GB)
Title: Improvements in regulating mechanism for steam or gas turbines
IPC: F01D1/28
Filed: 1925-09-10
Abstract: 240,152. Allmanna Svenska Elektriska Aktiebolaget. Sept. 18, 1924, [Convention date]. Regulating.-A rotatable regulating-valve 2, designed to eliminate throttling to a large extent, has two or more concentric sets of apertures 3, 4 controlling the supply of motive fluid from the chamber 1 to passages 5, 6 leading to various points in the turbine blade system. At full load, the passages 6 and the blade section 7 alone are supplied; at three-quarters load, the passages 5 and the blade sections 8, 7 are operative; while at half load fluid is admitted at the point 10 and expands through the whole blade system 9, 8, 7. A similar valve. or one of cylindrical form, may be used for an axial-flow turbine.
Patent GB-1430781-A (GB)
Title: Machine suitable for use in and a method of severing billets
IPC: B23K7/00
Filed: 1973-05-14
Abstract: 1430781 Shearing USM CORP 14 May 1973 [15 May 1972] 22762/73 Heading B3W A billet is severed from a metal workpiece clamped in aligned dies by moving one die in an arcuate path, the workpiece then being unclamped and the workpiece and billet being pushed out of the stationary and movable dies respectively. As shown, a metal, particularly aluminium, log from a furnace 68 is fed into a fixed apertured die (34), Fig. 3, not shown, and a movable apertured die 32 mounted on an arm 23 pivoted to the shear frame 12 at 25 and is held by a fluid-actuated clamp 72. The billet length to be sheared is determined by a gauging stop 58 adjustable by means of a handwheel 50. The arm is pivoted to shear the billet by fluid cylinders 16 and 42. At the end of the pivoting movement of the arm 23 a limit switch (L.S. 33), Fig. 4, not shown, is tripped to release the clamp 72, a piston-rod 60 mounted on the arm 23 and now aligned with the fixed die is actuated to push the log back into the furnace 68 and a piston-rod 85 mounted on the frame is actuated to push the sheared billet from the die 32 into a cradle 70 mounted on the arm adjacent the die 32.
Patent GB-693840-A (GB)
Title: Improvements in control systems for electric motors
IPC: H02P7/26
Filed: 1950-09-15
Abstract: 693,840. Automatic speed control systems. HEWITTIC SOC. A R.L. Sept. 15, 1950 [Oct. 10, 1949], No. 22770/50. Class 38 (iv). [Also in Group XXXVII] In an automatic speed control system for a reversible, separately excited D.C. motor, the armature current at starting, or upon reversing, is automatically limited and maintained at the limited value throughout the acceleration phase. The motor armature 7 is fed via the reversing switch 90, 91, from the rectifier 1 which is controlled by the auxiliary rectifier 10. This is controlled, as disclosed in Specification 669,850, by superimposing a sawtooth waveform generated at 21, 22, 23, 24, upon a control voltage obtained by comparing the armature voltage with a reference voltage tapped off a potentiometer 93. A battery 41 applies a predetermined minimum bias to the rectifier 10 to prevent overload when the armature voltage is low at starting, or of a reversed polarity (due to the armature back-E.M.F. on reversing). Under these conditions, rectifier 43 blocks and rectifier 42 conducts. The cathode of the rectifier 10 is connected to a point on a potential divider 96, 95, 31, across the motor armature so that a portion of the armature voltage opposes the limiting bias source 41, hence the limiting bias is reduced as the motor speed increases, and the accelerating current is maintained substantially constant at its maximum value. The rectifier 98 connects the resistor 96 into the potential divider when the motor is connected as shown ; but upon reversal, the rectifier 99 connects resistor 97 instead. In a modification, Fig. 2 (not shown), the speed of the motor is measured by a D.C. tachometer generator. In a further modification, Fig. 3 (not shown), polyphase rectification is used, the several controlling valves being controlled by a cathode follower to which the speed &c. control signals are applied.
Patent GB-1322402-A (GB)
Title: 4-way control valve
IPC: F16K11/02
Filed: 1971-04-19
Abstract: 1322402 Valves UNIVERSITY OF ILLINOIS FOUNDATION 18 Aug 1970 [18 Aug 1969] 22820/72 Divided out of 1322401 Heading F2V Operation of solenoid 103 acts to close one of the pilot valves 100, 102 and open the other. Pressure in one outlet passage 94, 114 and one chamber 92, 106 rises while the pressure in the other passage and chamber falls so that a diaphragm 104 is flexed to close the inlet passage 108, 86 entering the chamber at the lower pressure. Pressure inlet 84 is thus connectable to opposite sides of a piston 120. The valve is used to position a playback head, as described in Specification 1,322,401 (Division G4-G6).
Patent GB-1007001-A (GB)
Title: Improvements in or relating to electromagnetic motors
IPC: H01F30/02
Filed: 1962-06-14
Abstract: 1,007,001. Dynamo - electric machines. INTRON INTERNATIONAL Inc. June 14, 1962 [June 14, 1961 (2)], No. 22860/62. Head ing H2A. An electromagnetic motor comprises a rotor 41 of high permeability and low residual magnetism successively alignable with two pairs 40A, 40B and 40A<SP>1</SP>, 40B<SP>1</SP> of mutually angularly spaced electromagnetic windings alternately energizable by half-cycles of an A.C. source 42 through the inclusion in their circuits of respective oppositely poled rectifier diodes 44, 44<SP>1</SP>, together with two additional pairs 40C, 40D and 40C<SP>1</SP>, 40D<SP>1</SP> of windings which are similarly arranged and connected, but include in their circuits phase-shifting means for energizing the lattor pairs in staggered relationship to the former pairs. The means shown is a condenser 47. By adding to the rotor a secondary winding 48 connected to slip rings 481, 482, an A.C. load 483 may be fed with current whose frequency is stated to be half that of the source 42 when the rotor runs synchronously and that of the source when a flywheel 461 carried by the rotor shaft 46 is braked to a standstill by a lever 462. In a modification, a D.C. load instead is fed via a full-wave rectifier from the secondary winding.
Patent GB-517697-A (GB)
Title: Improvements in automatic fire-arms
IPC: F41A3/94
Filed: 1938-08-04
Abstract: 517,697. Machine guns. TENNANT, W. J. (Verwaltungs Ges. der Werkzeugmaschinenfabrik Oerlikon). Aug. 4, 1938, No. 23126. [Class 92 (ii)] The gas-pressure forces acting on the breechblock 4 of an automatic firearm are absorbed by hydraulic means which serves to couple the breech-block with the barrel 1 during the action of these forces. In the construction shown, the breech-block (shown in plan in Fig. 4) is connected by a member 8 and piston rods 10 with two pistons 11 moving in fluid-filled cylinders 14 connected to the barrel Each piston is provided with a spring-loaded non-return valve 12 and with longitudinal passages 11a, and the seat of the valve 12 is provided with slits 11b. When the breech-block moves forwardly under the action of a spring 5, the liquid is forced from one end of the cylinders to the other through passages 7b until the pistons close the forward ends of these passages. Subsequently, the liquid passes throughthe passages 11b and valves 12, the latter being urged by the liquid to their open positions. On recoil, the liquid can at first escape only through the slits 11b, since the valve 12, is closed, thus effecting a hydraulic coupling between the breech-block and barrel which, under this influence, move rearwardly in the breechcasing 3 against the action of a recuperator spring 6. This hydraulic coupling is released when the pistons uncover the forward ends of the passages 7b. The breech-casing 3 is connected to the gun mount by a bolt 16 and carries a stop 3d which limits the forward movement of the barrel.
Patent GB-598751-A (GB)
Title: Improvements in or relating to instruments for determining the deviation of a magnetic compass
IPC: G01C17/38
Filed: 1945-09-07
Abstract: 598,751. Magnetic tests and measurements. VESKIMEISTER, B. Sept. 7, 1945, No. 23170. [Class 37] An instrument for determining the deviation of a magnetic compass without swinging the ship comprises a base arranged for mounting on the compass and carrying two adjustable magnetic systems, of which one neutralizes the earth's magnetic field in the neighbourhood of the compass needle and the other constitutes an artificial magnetic meridian which can be turned about the axis of the needle. The base consists of a horizontal ring 10 having three arms 11 pivoted to it by three vertical axles 12 carrying gear-wheels 14 which mesh with a gear ring 15. This is rotatable by means of a worm 16 so as to turn the arms 11 simultaneously to vary the distance of feet 13 on the arms from the axis of the ring 10. The ring is mounted on top of a compass and the arms are adjusted until their feet engage the periphery of the compass top and locate the ring 10 with its axis coincident with that of the compass needle. A pair of sight vanes 18 at opposite ends of a diameter enable the base to be mounted with this diameter above the lubber line of the compass. A movable ring 19 is mounted on the base ring 10 and carries two standards 20 which support a tube 21 with its axis parallel to a diameter of the base. Inside the tube 21 is a right and left-handed screw 22 rotatable by a knob 23 and carrying two nuts 24 equally spaced from the axis of the base. These are attached, through a slot 25 in the tube 21, to a pair of brackets 26 mounted on the tube. Each bracket is bored to receive a split sleeve 28 in which a magnet 29 is inserted and clamped by a screw 30. These magnets are vertically over a diameter of the base, to which they present opposite poles. The strength of the horizontal component of the field due to these poles in the neighbourhood of the compass needle is adjusted by varying their distance from the centre until the earth's field is neutralized. An azimuth card 31 carries a tube 32 in which a nut 33 is slidable vertically by means of a screw 39 rotatable by a knob 40. The nut 33 is bored to take a magnet 34 extending horizontally through opposed slots 35 in the tube 32. This magnet provides an artificial magnetic meridian and strength of its horizontal component is varied by raising or lowering. The adjustment of the magnets 29 is indicated on a scale on the tube 21. The adjustment of the magnet 34 is indicated by a scale on the tube 32 and a scale on the knob 40 co-operating with an index on the tube. The permanent magnets may be replaced by electromagnets which may be similarly adjusted or means may be provided for varying the current by which they are energized or the number of turns through which the current is passed.
Patent GB-428337-A (GB)
Title: Improvements in fasteners
IPC: A44B19/38
Filed: 1934-08-11
Abstract: 428,337. Sliding - clasp fastenings. LEGAT, R. C., 87, Lincoln Street, New Britain, Connecticut, U.S.A. Aug. 11, 1934, No. 23250. [Class 44] Fastenings of the type in which similar elements on two stringers are interengaged by a slider have the narrow end of the slider so formed as to re - engage during its downward movement any elements which may have become disengaged by accident ; the elements are of course immediately afterwards disengaged by the normal action of the diverging channels at the top of the slider. The slider described is formed from a blank of the shape shown in Fig. 8 so as to have at the single channel end the inwardly converging guide flanges 22, 23 and front and rear apron portions 24, 25 whereby the accidentally disengaged elements are brought into re-engagement during the downward movement of the slider.
Patent GB-1489153-A (GB)
Title: Electronic musical instrument
IPC: G10H7/04
Filed: 1975-05-28
Abstract: 1489153 Electronic musical instruments NIPPON GAKKI SEIZO KK 28 May 1975 [31 May 1974 (2)] 23299/75 Heading G5J A digital electronic musical instrument has one or more keyboards 1; a logic arrangement 2, 3 (Figs. 3, 4, not shown) for generating an address code representing a depressed key; a memory 10<SP>1</SP> which upon receipt of the address code delivers a first numerical value representative of the desired frequency; a vibrator function generator 11<SP>1</SP> which produces a fluctuating second numerical value; a multiplier 13 which multiplies together the first and second numerical values; an accumulator 5a, 5b, 5c which is repeatedly incremented by the value from the multiplier 13; and a memory 6 which stores a representation of the required waveshape and produces an appropriate frequency modulated tone in response to the output of the accumulator. The memory 6 stores the waveshape at 64 sampled numerical values so that a complete waveform is read from the memory for every 64 counts in the highest order 5c of the accumulator. The rate at which these 64 counts are received and therefore the musical note generated depends upon the value added into the lower orders 5a, 5b of the accumulator at each clock period which in turn depends upon the value read from the read only memory 10 to represent the nominal frequency and the multiplier derived from generator 11 which provides a frequency modulation of the output tone. The apparatus has means for selecting a different vibrato speed and depth for each keykoard. Upon depression of a key one of four oscilators (S0-P0) (Fig. 7, not shown), selected according to the key board identifying portion of the key address code, is fed to a counter (SR2) which repeatedly counts to its full value and resets; the output of the counter is multiplied (Fig. 9, not shown) by a two bit depth code also selected (Fig. 8, not shown) according to the keyboard and the result is fed to the multiplier 13 (Fig. 5). An envelope memory 21 is provided to control the attack and decay portions of the note played and this is read in a similar way to the waveshape memory. The apparatus can play up to twelve note simultaneously, operating on a time sharing basis. In a modification (Figs. 15-17, not shown) the vibrato depth is varied during the period the key is depressed.
Patent GB-727006-A (GB)
Title: Pin type strip feeding device
IPC: G03B1/42
Filed: 1953-08-24
Abstract: 727,006. Typewriters &c. STANDARD REGISTER CO. Aug. 24, 1953, No. 23344/53. Class 100 (4). A pin type strip feeding device has a pin carrying member in which the pins are pivoted so that they can be moved simultaneously into and out of the operative position. Pins 7, Fig. 2, are pivotally mounted by pivot pins 6 in a body 1 adjustably secured to a shaft 2. Lugs 9 of a collar 8 engage between the pins 7 to project or withdraw them by pivoting them about the pins 6, the collar being lockable in either position by a draw-nut 10. In a modified construction, Fig. 9, a guide collar 17 fixed to a mounting hub 15 has guide slots 18 in which studs 20 of pins 19 engage while other studs 21 of the pins pivotally engage an adjusting collar 22. The collar 22 has pairs of recesses engaged by spring-biased plungers of a lock collar 25 so that by movement from one position to the other the bases of the pins 19 are moved, causing the studs 20 to slide and pivot in the guide slots 18 to project or withdraw the pins from the periphery of the collar 17.
Patent GB-518125-A (GB)
Title: Improvements relating to rheostatic braking systems for direct-current electric motors
IPC: B60L7/04
Filed: 1938-08-08
Abstract: 518,125. Electric braking of D.C. motors. NEWSAM, H., and METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. Aug. 8, 1938, No. 23409. [Class 38 (iii)] in a rheostatic braking arrangement for a D.C. motor A one component field winding F' is in series with the armature and a braking resistance R. and a second component field winding F<2> is shunt-excited through a portion of the resistance which gives it a counter excitation diminishing as the speed diminishes. The object is to keep up the braking effort, as, for example, on trolley buses. In a modified arrangement two resistances R<1>, R<2> are disposed as in Fig. 3, and in a further modification a small exciter machine coupled to the motor A supplies counter voltage to the field winding F<2>. Specification 515,329 is referred to.
Patent GB-1026368-A (GB)
Title: Dibenzoxazolyl-and dibenzthiazolylstilbenes and their use as optical brightening agents
IPC: D06L3/12
Filed: 1964-06-05
Abstract: Novel compounds of the formula <FORM:1026368/C2/1> wherein both Y atoms are 0 or both are S, R1 and R2 which may be the same or different are H, halogen, alkyl, aryl or alkoxy, in particular chlorine, bromine, methyl to butyl, phenyl, tolyl, ethoxy or methoxy such that the two benzazole groups are identically substituted with respect to number, kind of R group and position, can be made by heating one mole of 4,41-stilbene dicarboxylic acid with at least two moles of the corresponding o-hydroxy or o-mercaptoarylamine. The following substituted compounds wherein Y = 0 are claimed per se the number indicating the position:  5 Me; 5 tert butyl; 5 Cl; 5 C6H5; 5-O-Me.  Where Y = S the following are also claimed per se: 5 Me; 6 Me; 6 Cl; 6-O-Me.  Lists of starting materials include some disubstituted amino hydroxy and mercaptobenzenes.  The compounds are suitable as optical brighteners (see Division D1) and are started to be soluble in dimethyl formamide, pyridine, dioxan and chlorobenzene.ALSO:Polyolefins or polyethylene terephthalate, especially in the forms of textile fibres or woven fabrics, optionally also admixed with a hydrophilic fibre, are optically brightened by contacting with a compound of the formula <FORM:1026368/D1-D2/1> wherein both Y10 are O or both are S1R1 and R2 which may be the same or different are H, alkyl, aryl, halogen or alkoxy, either in the resin melt, with a solution of the compound in an organic solvent, or with an aqueous dispersion thereof, under conditions of exhaust or thermosol dyeing optionally together with bleaching agents e.g. NaOCl, acids, detergents, plasticizers U.V. absorbers, plasticizers and colouring agents, optionally with formic acid.
Patent GB-433097-A (GB)
Title: Improvements in or relating to power transmission mechanism and variable speed gearing
IPC: F16H61/02
Filed: 1934-03-29
Abstract: 433,097. Variable speed gearing. NEWTON, N. B., Newton & Bennett Works, Valetta Road, Acton, London. March 29, 1934, No. 23508. Divided out of 422,423. [Class 80 (ii)] A power-transmission system comprises in combination an automatic centrifugal friction clutch a, having a voluntary control pedal c, and a change-speed gear b, having frictional or other progressive ratio-selecting and driveproviding means such as brakes or clutches. The clutch a may be that described in Specification 401,889. As shown, the gear b is the Wilson gear described in Specifications 164,042 and 328,660, [both in Class 80 (ii)], having brake-bands operated by a lever g under control of preselector mechanism, (not shown). The lever g has a pin-and-slot connection i with the clutch-pedal c, so that the clutch disengages before the gear is changed. In a clutch-operated change-speed gear the selecting clutches may comprise expanding friction cones moved by hydraulic pressure. Selection may alternatively be effected by controlled hydraulic plungers engaging a cam. The hydraulic distributing- valve controlling such gears may be interconnected with the clutch-pedal c.
Patent GB-1340712-A (GB)
Title: Work stop for limiting the position of a work-piece when placed on a slotted table or slide of a machine tool
IPC: B23Q16/00
Filed: 1971-04-19
Abstract: 1340712 Work tables and stops; benches A GUDEL 19 April 1971 [27 April 1970] 23539/71 Heading B3B [Also in Divisions B4-B5] A machine tool work table or slide 10 has a workstop for limiting the position of a workpiece when placed on the table or slide, the stop comprising two oppositely-directed wedge members 1, 2 located in a slot 3 in the table or slide. The wedge members are displaceable along the slot and can be locked in a selected position by driving the members together in opposite directions, one of the wedge members projecting beyond the surface of the table or slide to serve as a stop surface for the workpiece. The wedges have equal wedge angles and may be of the same size and form.