baber/WOPTO huggingface dataset:
Patent GB-1437304-A (GB)
Title: Motordriven portable tool with sound-absorbing housing
IPC: B24B23/00
Filed: 1974-07-01
Abstract: 1437304 Portable tools METABOWERKE KG CLOSS RAUCH & SCHNIZLER 1 July 1974 [14 July 1973] 29051/74 Heading B3D [Also in Division F2] A motor driven portable grinder comprises the noise generating parts, e.g. a motor 2 and gearing 4, contained within a carrier framework 1, 5 which is within and spaced from a housing 9 made of synthetic plastics material, and wherein sound absorbing bridges 8 support the framework within the housing 9. The housing material may be sound absorbing foam material. The housing is made in two halves and joined together by screws. Openings 16 allow access to maintenance points, e.g. motor brushes, and are closed by covers 17. An axial flow air cooling fan 3 is provided. An output shaft 6 carries a grinding wheel 7 and a collar 26 supports a guard 27 for the protection cf an operator's hands.
Patent GB-828179-A (GB)
Title: Improvements relating to fire extinguishing apparatus
IPC: A62C13/00
Filed: 1957-09-16
Abstract: 828,179. Fire extinguishing apparatus. KEEMA, A. W. Sept. 16, 1957, No. 29130/57. Class 47 [Also in Group XXVIII] Fire extinguishing fluid 11 such as carbon tetrachloride in a reservoir 10 is expelled through a nozzle 13 by a piston 12 under the action of liquid pressure applied to the side of the piston opposite that towards the nozzle 13, a frangible diaphragm 14 being provided for sealing the nozzle 13 from the fluid 11, and heat responsive means being provided for operating liquid pressure control means for applying said liquid pressure to the piston 12. It is the object of the invention to utilize the normal water supply of a building as the liquid pressure source. In Fig. 1, the passageway from the liquid pressure source to he diaphragm 12 is blocked by spaced diaphragms 15, 16, which with the diaphragm 14, are adapted to be pierced by pivoted knives 18, 19 and 17 respectively actuated b ya linkage 20 and plungers 55 upon the release of a suspended weight 21 when a fuzible link 72 in a suspension cord 65 fractures upon the occurrence of a predetermined temperature thereby causing the ejection of fluid 11 from the nozzle 13. In two modifications, Fig. 5 (not shown) and Figs. 6-9 (not shown) the diaphragms are adapted to be pierced by slidable pointed members actuated by wedge or cam surfaces on the plunger 55 of the linkage 20. In another modification, knives 103, Fig. 10, having cylindrical bodies are slidably received within oppositely disposed bores 100. A knife edge 104 on each knife 103 is adapted to move through diaphragms 102 to shear an opening therethrough upon downward pressure of the plunger 55C. In a further modification, the reservoir 110, Fig. 12 is provided at each end with diaphragm 116, 117 which are each scored at 118, 119, Fig. 13, to provide a point of weakness 120. The liquid pressure supply line 128 includes a gravity operated valve Fig. 11 (not shown) adapted to open when a link in a suspension cord fuses, thereby permitting pressure liquid to apply force to and to rupture the diaphragm 116. The liquid pressure is then applied to the piston 138 in the reservoir 110 and to the fluid 112 and diaphragm 116 which also ruptures to allow passage of liquid to a discharge nozzle 124, having outlets 125 which may be aimed at different points. The operating lever of the gravity operated valve in the liquid pressure supply line 128 also closes contacts to actuate an electric alarm. A pressure sensitive device 150 extending into the passageway between the diaphragms 15,16, Fig. 1, is adapted to close electric contacts to sound an alarm in the event of a leakage at the water pressure sealing diaphragm 16. In addition an air actuated whistle is carried by a tubular member opening into a bore leading to the space between, the diaphragms 15, 16, and is adapted to give an audible signal upon rupture of, or leakage at, the diaphragm 16.
Patent GB-1512132-A (GB)
Title: Sulphoalkylated lignins and their use in oil well cementing process
IPC: C09K8/46
Filed: 1976-07-13
Abstract: 1512132 Hydraulic cement composition HALLIBURTON CO 13 July 1976 [2 Feb 1976] 29157/76 Heading C1H [Also in Divisions C2 and El]  An hydraulic cement composition which contains as setting retarder either a sulphoalkylated lignin having an average M.W. of 3500 to 10,000 and which is substantially sulphoalkylated at the position ortho to the free phenolic OH group of the benzene ring in the lignin molecule, and wherein the alkyl moiety is such that the sulphonic acid group is connected to the benzene ring by a methylene or (C 1 -C 4 ) alkyl-substituted methylene group, or a composition comprising said sulphoalkylated lignin and at least one water-soluble hydroxy carboxylic acid. Preferred sulphoalkylated lignins have a M.W. of 3000 to 4000 and a sulphur content of 3-8% by wt. Also, the sulphonate group thereof may be present as the free acid or a salt thereof, as may be the carboxylic group of the hydroxy-carboxylic acid. Preferred hydroxy-carboxylic acids have 4 to 10 C atoms and at least one terminal carboxylic group. The weight ratio of hydroxy-carboxylic acid to said lignins is in the range 1:0À1 to 5À0. The composition is useful for cementing a zone, e.g. a zone penetrated by a well bore, at elevated temperature.
Patent GB-1217152-A (GB)
Title: Improvements in appliances for storing and dispensing fluids, such as hypodermic syringes and eye drop dispensers
Inventor: DREWE JOHN
IPC: A61M3/00
Filed: 1967-03-14
Abstract: 1,217,152. Surgical syringes &c. A. BANE. 5 March, 1968 [14 March, 1967; 23 June, 1967], Nos. 11983/67 and 29170/67. Heading A5R. A syringe, eye-dropper or the like, in which a cannula is forced into a sealed flexible container to deliver or collect a liquid therein, comprises (referring to Fig. 1) a flexible container 1 having a plug 3 at one end carrying an external screw thread 4, on to which fits the internal screw thread of the member 5 carrying the needle 6. A cover 8 fits over the needle and carrying member and abuts against a shoulder 10 at the base of the container. The cover is a friction fit on a part of the member 5 having longitudinal serrations 7, but both the cover 8 and the members 5 are slightly tapered and/or the cover includes a wider section 11 so that, when the cover 8 is rotated, the needle-carrying member moves inwardly along the screw thread towards the container until the needle pierces the plug 3, by which time the cover and member 5 have disengaged and the cover can be removed. The eye-dropper shown in Fig. 3 functions similarly.
Patent GB-417547-A (GB)
Title: Improvements in or relating to gluing apparatus for use primarily in the manufactureof doors
IPC: B27F4/00
Filed: 1933-10-21
Abstract: A dowel-glueing apparatus comprises a glue container 1, a heater 3, glue-circulating means such as a pump 7, a glue discharge nozzle 15 and a pad or plate 16, so arranged that as the dowels 19<a> are passed across the face of the pad 16, their upper surfaces are coated with glue by the nozzle 15 and their lower surfaces by the pad 16.  A drip channel 22 and a splash guard 23 may be provided, and two glueing <PICT:0417547/III/1> devices may be mounted on a base plate 29 so that their distance apart can be adjusted to accommodate components 19 of various widths.
Patent GB-536941-A (GB)
Title: Improvements in x-ray tubes
IPC: H01J35/02
Filed: 1939-11-02
Abstract: 536,941. R÷ntgen-ray tubes. ALLIBONE, T. E., and METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. Nov. 2, 1939, No. 29247. [Class 39 (i)] The target 1 of a high voltage X-ray tube is cylindrical or spherical and an electromagnet 10 is provided so that the cathode ray from the tube 6 may be deflected on to different parts of the target surface to enable the rays to be used at different angles. The tube is enclosed in a shield 7, which may be of the kind described in Specification 438,147. The shield has a number of outlet passages or it is adjustable with only one passage 8 for the rays ; it has a slot 9 to accommodate (i) the tube 6 and (ii) a side extension 11 into which the cathode rays may be deflected when not required. The electromagnet is housed in the shield ; for a spherical tube the shield is cubical. The sides of the tube are closed by plates 2, and a water-cooling jacket 3 surrounds the target; this is of metal of high atomic number or is plated with such a metal the X-rays penetrate the target.
Patent GB-736063-A (GB)
Title: Transistor amplifier
IPC: H03F3/30
Filed: 1953-10-23
Abstract: 736,063. Transistor amplifying circuits. RADIO CORPORATION OF AMERICA. Oct. 23, 1953 [Nov. 7, 1952], No. 29370/53. Class 40 (6). In an amplifier comprising a pair of semiconductor devices of symmetrical characteristics, the input is applied in parallel to the input electrodes and the output electrodes feed a common load. A signal source, Fig. 1, fed in at terminals 15 is applied to the base electrodes 12, 23 of a PNP and NPN transistor 10, 20 respectively, the emitters 13, 22 being grounded over batteries 16, 26. In view of the characteristics of the transistors 10, 20 a signal causing an increase in the collector current Ic 1  will cause a decrease in the current Ic 2  so that, the two variations are additive in the load ZL. The circuit operates in Class B but, by biasing the base 12 more negatively, Class A operation results while more positive biasing gives Class C operation, the base 23 being biased appropriately in each case. In Class A operation, a small static current flows from collector 11 to collector 24 and terminal 19 is at earth potential, the signal causing the potential to rise and fall. The load may therefore be omitted, each transistor acting as a load for the other and the circuit may feed the grid of a valve directly without other components. In a modification, Fig. 3 (not shown), the base resistors 17, 27 are returned to taps on potential dividers across the batteries to give Class A operation and limiting resistors are included in the emitter circuits. A signal from a pick-up may feed the base circuit of a preceding stage over a transformer, the collector being grounded while output is taken from the emitter to feed the amplifier 10, 20 which operates a loud-speaker. In a modification, Fig. 2, the transistors 30, 44 operate with the emitters 32, 46 feeding the load ZL and the collectors 34, 48 grounded over limiting resistors 36, 50 and batteries 37, 49. The base electrodes 33, 47 are given appropriate biases over resistors 39, 43 from batteries 40, 42 and capacitors 38, 41, 45 and 51 provide lowimpedance paths at signal frequencies. The impedances looking into the emitter circuit is low so that it will feed a low-impedance load and is essentially a current amplifier. In a further modification, Fig. 4 (not shown) the input is applied to the emitters of P and N type point transistors, the load being in the collector circuits.
Patent GB-415903-A (GB)
Title: Improvements in or relating to spirit levels
IPC: G01C9/28
Filed: 1933-10-24
Abstract: 415,903. Levels. BACH, N. C., 71, Finsensvej, and NIELSEN, R., 4, Nordre Fasanvej, both in Copenhagen. Oct. 24, 1933, No. 29458. Convention date, Dec. 23, 1932. [Class 97 (ii).] One or more spirit levels are adjustably mounted in a stock and a member adapted to project transversely from the stock is adjusted by a screw which is rotably mounted but incapable of axial movement. In the form shown, the stock supports in its top surface a chair 1 with two blocks, between which the level tube 4 is supported. The block 2 is fixed but the block 3 may be adjusted to tilt the tube 4. Rotation of a screw 7 at one end of the stock causes a graduated block 8 to project from a transverse hole. At the other end of the stock another chair 9 carrying a level tube 10 is adjustably mounted. In a modification the tube 10 may be mounted in a pendulous body 12, pivoted at 11. A screw 13 is adapted to clamp the body 12 after it has been set by gravity.
Patent GB-264964-A (GB)
Title: A new or improved shock absorber
IPC: F16F7/04
Filed: 1926-08-21
Abstract: 264,964. Eckford, F., G. Aug. 21, 1926. No Patent granted (Sealing fee not paid). Vibration-dampers.-A friction-disc vibrationdamper adapted to act in one direction only or in both directions as desired, consists of a series of rings or discs fixed with respect to a vehicle frame and held in contact with a second series of rings connected to the axle through a pair of opposed roller clutches, one of which may be held out of action. The metal discs e are held against rotation by pins f secured in a base a fixed to the vehicle frame d. The discs g also of metal alternate with the discs a and oscillate with a sleeve h which is connected by opposed roller clutches to a member k carrying an operating arm y connected to the axle. Floating fabric discs are interposed between the metal discs e and g, or the metal discs may be faced with fabric. The rollers m are wedged in oppositely inclined tapered recesses l, l<1> in the member k by means of springs n when the apparatus is acting in both directions. When, however, it is required to act in one direction only, the rollers in the recesses l<1> are moved towards the wide ends of the recesses by pins o secured to a plate p which can be adjusted relatively to the end pressure plate q. The plates are forced together by a helical spring t acting through a ball thrust bearing r, the thrust of the bearing r being transmitted to the pressure plate q. In a modification, pressure exerted by the spring t is varied in accordance with the amplitude of the vibrations, the nut u being replaced by an arrangement in which a nut rotatable with the operating arm forms the abutment of the spring and oscillates on a fixed screw.
Patent GB-464266-A (GB)
Title: Improvements in photographic objectives
IPC: G02B9/04
Filed: 1936-10-30
Abstract: 464,266. Lenses. ZEISS, C., [Firm of]. Oct. 30, 1936, No. 29494. Convention date, Nov. 15, 1935. [Class 97 (i)] Relates to photographic objectives consisting of two members, one being a meniscus triplet the concave surface of which faces the other member, and the two outer elements of which have powers of opposite signs and have refractive indices greater than that of the inner element ; the other member being convergent and having a focal length smaller than that of the objective. According to the invention the sum of the numerical values of the radii r<1>, r<6> of the first and last surfaces is greater than two-thirds of the focal length of the objective. The radius r<2> is numerically at least 1À5 times the radius r<1>. Data are given for the example shown, having an aperture F/2À8 and for another example, having an aperture F /3À 5 in which the second member is a doublet consisting of a double concave element and a double convex element.
Patent GB-430134-A (GB)
Title: Improvements in silencers for firearms, internal combustion engines and the like
IPC: F41A21/30
Filed: 1934-10-16
Abstract: 430,134. Exhaust-silencers. COANDA, H., 9, Boulevard Haussmann, Paris. Oct. 16, 1934, No. 29575. [Class 7 (ii)] [See also Group XXI] Relates to silencers for the exhaust gases of internal - combustion engines in which the gases pass into an expansion chamber 4 and reach the atmosphere in the form of thin sheets by escaping through a series of narrow slits 6. According to the invention, the walls of the slits are extended on one side towards their outer end by providing shaped projections 7 round which the escaping gases are guided. In the form shown, the slits are formed between a number of ring-shaped elements threaded on a central stem 14 and spaced apart by thin washers 16. The shaped end 17 prevents the formation of eddies.
Patent GB-797831-A (GB)
Title: An improved coupling transformer for use in superposing audio frequency signal voltages on heavy current networks
IPC: H01F30/10
Filed: 1954-10-14
Abstract: 797,831. Transformers. LANDIS & GYR AKT.-GES. Oct. 14, 1954 [Oct. 14, 1953], No. 29646/54. Class 38 (2). [Also in Group XXXIX] A coupling transformer for the purpose of injecting audio frequency voltages into a power network comprises primary and secondary windings 1, 2 respectively having individual rod-like iron cores 3, 4, the coil and core assemblies being arranged in spaced axial relationship, the requisite spacing-and thereby the coupling -being determined by spacing rings 14, insulation, necessary to withstand the network voltage being provided by an insulating plate 12. The primary and secondary windings are wound on formers 7, 6 respectively, the transformer being assembled between insulating end-plates 10, 11 by means of an axial insulated bolt 13. Three such transformers situated at 120 degrees with each other can be used in a three-phase network.
Patent GB-627588-A (GB)
Title: Improvements in or relating to thermionic valve saw tooth wave generators
IPC: H03K4/12
Filed: 1946-10-04
Abstract: 627,588. Saw-tooth or pulse generating circuits. SADIR-CARPENTIER. Oct. 4, 1946, No. 29704. Convention date, May 7, 1945. [Class 40 (vi)] In a generator of saw-tooth waveforms a capacitor is charged at a substantially constant rate through a valve and then rapidly discharged by means of a second valve which is controlled by a third valve, control pulses being applied to both the first and the third valves. In the Figure valves 2 and 4 are normally cut-off, valve 3 conducting to dis. charge capacitor 1. Positive going pulses applied to terminals 8 and 9 cause the capacitor 1 to charge through valve 2, which is preferably a constant current device such as a pentode ; valve 4 is similarly rendered conducting the voltage drop across the anode resistor 5 cutting- off valve 3. At the termination of the positive going pulse valve 4 is cut-off and capacitor 1 rapidly discharges through valve 3 which is then conducting. The controlling pulses may be from different sources, the capacitor then only charging during the period when positive going pulses are present at both terminals 8, 9 simultaneously and only discharging when the positive pulse,at the grid of valve 4 terminates. By varying .the relative duration and time of occurrence of the controlling pulses a variety of truncated saw-tooth wave-forms may be generated, Fig. 3 (not shown).
Patent GB-674191-A (GB)
Title: Improvements in jacks for agricultural trailers
Inventor: LEE FRANCIS
IPC: B60S9/06
Filed: 1949-11-22
Abstract: 674,191. Jacks. MASSEY-HARRIS. Ltd. Nov. 20, 1950. [Nov. 22, 1949] No. 29833/49. Class 78 (iii). [Also in Group XXXI] In a jack for an agricultural trailer, in which a jack arm formed of spaced plates is pivoted on a draw bar formed of spaced side plates, the jack arm being raised or lowered by a screw threaded rod engaging a nut pivoted on the draw bar and being rotably carried at its lower end to be capable of sliding along the jack arm as the latter is raised or lowered ; the nut is carried on a bracket pivoted between the side plates of the draw bar and the lower end of the rod is carried in a bearing pivoted on brackets slidable between the plates of the jack arm. As shown the jack arm 1 is pivoted at 1<SP>1</SP> to the draw bar 2 of the trailer and carries a skid 4. Intermediate the ends of the arm 1 are slidably mounted the brackets 5 pivotally carrying the bearing 5<SP>1</SP> in which the screw threaded rod 3 is rotably carried. The rod carries the nut 6 mounted in a bracket 6<SP>1</SP> pivoted on the plates of the draw bar pins 6<SP>2</SP>, the jack being operated by a cranked end of the rod 3. In its raised position the arm 1 is held in position by a spring urged catch 7, a tail arm 7<SP>1</SP> on the catch having its movement under the action of the spring 8 limited by a lower coupling member 2<SP>1</SP> of the draw bar when the jack arm is lowered.
Patent GB-734208-A (GB)
Title: Improvements in or relating to spectacle frames
IPC: G02C1/08
Filed: 1952-11-25
Abstract: 734,208. Spectacle frames. IRONS, A. A. Nov. 12, 1953 [Nov. 25, 1952], No. 29835/52. Class 97 (1). Each eye-frame of a spectacle frame is split and the side arms and the adjacent ends of the eye-frames are provided with pins and slots co-operating to form pivots and so arranged as to cause the divided parts of the eye-frames to be secured together when the side arms are mounted in position. As shown in Fig. 3, each end of a split eye-frame 1 has a lug 4 carrying a vertical slot open to the side or rear to allow the insertion therein of a pivot-pin 8 on the side arm 6, the pin being held as a press fit in the slots and the end of the side arm holding the ends 4 together. Alternatively, as shown in Fig. 8, the frame ends 13 may be provided with pivot pins 14 engaging slots 16 on the side arm 6. The eye-frame may be split into two portions and be held together at one side by the side arm and at the other by a pin-and-slot or dovetail joint.
Patent GB-498210-A (GB)
Title: Improvements in and relating to electric valve circuits
IPC: H02M1/02
Filed: 1937-11-01
Abstract: 498,210. Converting; control systems for consumption apparatus. BRITISH THOMSON-HOUSTON CO., Ltd. Nov. 1, 1937, No. 29843. Convention date, Oct. 31, 1936. [Classes 38 (ii) and 38 (iv)] Thermionic and like control.- Comprises an excitatibn circuit for arrangements employing discharge devices for interconnecting A.C. and D.C. circuits and A.C. circuits of the same or different frequency, in which means are provided responsive to the decay of voltage between the anode and cathode of a device upon conduction commencing which injects a voltage into the excitation circuit to effect de-energization of the control electrode. The Figure shows an arrangement having valves 1-4 of the immersion-ignitor type for interconnecting A.C. networks 5, 6. The excitation circuit of each discharge device comprises a condenser 16 which is charged from a transformer 17 through an auxiliary rectifying valve 18 and resistance 19, and is discharged when an ignition impulse is required by means of a valve 20 through a transformer 24, the secondary of which supplies the ignitor electrode 10. The grids of the valves 20 are supplied from a phase shifting circuit 33 to determine the moment of ignition. As soon as conduction commences in a discharge device, the ignitor electrode is de-energized by means of a circuit 27 comprising a condenser 28 in series with a resistance 29 across the discharge device. The resistance 29 is also connected in the primary circuit of a transformer 30, the secondary of which is in the anode circuit of the valve 20 so that as soon as the discharge device 1 becomes conductive the condenser 28 discharges through the resistance 29 and injects into the anode circuit of the valve 20 a voltage which renders the valve non-conductive. The control impulses for the valves 20 derived from the transformer 35 may be peaky.