baber/WOPTO huggingface dataset:
Patent GB-634741-A (GB)
Title: Preparation of compounds of the cyclopentanodimethylpolyhydrophenanthrene series
IPC: C07J75/00
Filed: 1947-07-16
Abstract: D 17,20-3-Hydroxy-11-keto-21-acyloxypregnenes, of the general formula <FORM:0634741/IV (b)/1> (wherein Y represents an oxidation-resistant acyl group which can readily be removed by hydrolysis), are manufactured by the action of an acylating agent corresponding to the group Y, e.g. an anhydride of a monobasic or dibasic carboxylic acid, on D 17,20-3 : 21-dihydroxy-11-ketopregnene, which is made by reacting a D 17,20-3-acyloxy-11-keto-21-halopregnene with an alkali or alkaline-earth metal salt of an aliphatic carboxylic acid containing not more than six carbon atoms in the molecule (preferably in a solvent in which the metal salt has appreciable solubility), and saponifying the resulting 3 : 21-diacyloxy compound.  In an example, D 17,20 - 3(a ) - acetoxy - 11 - keto - 21 - bromopregnene is refluxed with anhydrous potassium acetate in acetone, the resulting 3(a ) : 21-diacetoxy-compound is refluxed with methanolic potassium hydroxide, and the 3(a ) : 21-dihydroxy-compound so obtained is warmed with succinic anhydride in pyridine to produce D 17,20-3(a )-hydroxy-11-keto-21-hemisuccinoxypregnene. The product may be re-esterified in the 3-hydroxy group, e.g. by treatment with acetic anhydride.  Alternative starting materials are the corresponding compound having the 3-acetoxy group in the cis-form, and compounds in which the 3-acetoxy group is replaced by a group derived from propionic, butyric, valeric, caproic, capric, benzoic, toluic or phenylacetic acid.  Other alkali or alkaline-earth metal salts which may be used are those of propionic or butyric acid, whilst additional acid anhydrides specified for the esterification of the 21-hydroxy group are acetic and phthalic anhydrides.  Specification 630,431 is referred to.  The Specification as open to inspection under Sect. 91 comprises also the use as starting materials of D 17,20-3-hydroxy-11-keto-21-halopregnenes instead of the 3-acyloxy compounds, and the use of acids instead of anhydrides in the esterification step.  This subject-matter does not appear in the Specification as accepted.
Patent GB-1097985-A (GB)
Title: Water-soluble reactive monoazo-pyrazolone dyestuffs and processes for their manufacture
IPC: C09B62/51
Filed: 1965-05-06
Abstract: Water-soluble reactive dyes of formula <FORM:1097985/C4-C5/1> in which n is 0, 1 or 2 are prepared by diazotizing an amine of formula <FORM:1097985/C4-C5/2> and coupling with a compound of formula <FORM:1097985/C4-C5/3> <FORM:1097985/C4-C5/4> and when a hydroxy compound is used the hydroxyl group is esterified with concentrated sulphuric acid or an esterifying agent providing sulphur trioxide in an inert organic solvent. The dyes are used to dye cotton, linen and viscose materials in green-yellow shades.
Patent GB-783528-A (GB)
Title: Improvements in and relating to electrical frequency measuring apparatus
IPC: G01R23/10
Filed: 1954-06-30
Abstract: 783,528. Frequency measurement. INTERNATIONAL AERADIO, Ltd., and GREEN, A. J. Sept. 29, 1955 [June 30, 1954], No. 19170/54. Class 37. Apparatus for indicating the number of electrical pulses occurring during a predetermined interval of time comprises a cascaded frequency divider circuit responsive to a standard oscillator to open a gate circuit for successive periods of time differing from said predetermined interval by a multiplication factor k, and a further frequency divider circuit fed from an oscillator or pulse generator energizes the input of the gate at a pulse frequency representing the oscillator or generator frequency divided by the divider constant and by k, so that the number registered by the counter represents pulses arriving in the predetermined time. A reference standard quartz crystal of e.g. 1m c/s. controls an oscillator 1 exciting a chain of decade frequency dividers shown as 2 to 4, &c., each comprising four binary counters with a feed-back connection across each, such that after, e.g., 8 pulses have been counted, the counter is caused to step into a count of, e.g., 14 so that the maximum count of 16 is reached after 10 input pulses ; a switch 20 being provided to disconnect the feedback path of counter 4. The output at, e.g. 1 c/s. or 1/ 10  c/s. synchronizes a square wave generator 6 to produce pulses of 1 sec. or 10 secs. duration, initiated by a manual or automatic control device 7, to open a gating circuit 8 for successive periods of 1 second or 10 seconds. A quartz crystal to be standardized controls oscillator 9 exciting a decade frequency divider 10 of four binary counters; with feedback disabled by switch 19 as described above to feed synchronized pulses at <SP>1</SP>/ 10  oscillator frequency to the gate, which alternately opens and closes to admit trains of pulses numbering the test crystal frequency (or 1/ 10  thereof) to a chain of decade frequency dividers 13, 14, &c. with feedback as described; each having indicating devices 17, 18, &c. digitally displaying the count over the timing interval. Since the operation of the decade frequency dividers comprising four successive binary counters with feedback to achieve the decade count is slowed, due to the time delay allowing the feedback pulse to be generated and fed back over an interval between two count pulses, the available frequency operation limit is extended by ganging switches 19, 20 to open together so that the dividers 4 and 10 respectively count 16 instead of 10, the gate opening time is increased by a factor of 1.6 and the frequency of the divided signal from oscillator 9 is divided by a factor of 1/1.6. Thus the final frequency indication is unaltered while the operational speed of the dividers and the maximum working frequency are increased.
Patent GB-1475466-A (GB)
Title: Devices for protecting animals from ectoparasites
IPC: A01N25/34
Filed: 1975-05-07
Abstract: 1475466 Device for protecting animals from ectoparasites P R G DICK and M ROMBI 7 May 1975 [7 May 1974 16 April 1975] 19221/ 75 Heading A5E An insecticidal device capable of being fastened to the neck of an animal, comprises a composition containing diazinon or diazoxon [diethyl 0-(2-isopropyl-4-methyl-6-pyrimidinyl) phosphate] or mixtures thereof as the active princible, a solid vinyl or vinylidene polymer or copolymer (e.g. a vinyl chloride polymer) and a plasticiser therefor, and means for attaching the composition to the animal. Preferred plasticizers are dibutyl phthalate and dioctyl adipate. Optional ingredients are colouring agent, pigments, stabilizers and deodorants. The compositions may be contained in a plastic cover having orifices therein and may have an outer case impervious to the active principles, or may be in the form of a band or belt or a hollow strip enclosing a belt. Methods of producing the devices are claimed.
Patent GB-357973-A (GB)
Title: Improvements relating to alternating electric current circuit breakers
IPC: H01H33/98
Filed: 1930-06-24
Abstract: 357,973. Oil-break switches. PEARCE, H., Green Mount, Barrington Road, Altrincham, Cheshire, and ASSOCIATED ELECTRICAL INDUSTRIES, Ltd., Crown House, Aldwych, London. June 24, 1930, No. 19280. [Class 38 (v).] Arc-rupturing devices.-In an A.C. circuit-breaker of the kind in which a fixed and a movable contact are located in a secondary oil-containing vessel mounted within a main oil tank the fixed contact being of tubular construction located at the upper end of the secondary oil vessel so that as the contacts open oil and gases generated by the arc formed therebv are caused to be discharged out of the secondary vessel and through the tubular fixed contact into the outer oil-containing vessel by the pressure of the gas. The pressure within the secondary vessel may be augmented by producing a preliminary current break at auxiliary contacts mounted therein. As shown in the Figure, the lowering of the bridge member 16 draws down the rod 15 and causes a current interruption between contacts 20, 30 within the explosion chamber 4 the contact 7 being held in engagement with the tubular fixed contact 6 by springs 18 acting between insulated bridge members 9, 14. The arc formed between contacts 20, 30 creates a gas pressure within the chamber and on further downward movement of the roof 15 when the bar 14 engages nuts 17 on rods 12 depending from the bar 9 and draws the rod 17 downwardly from the end of the passage 6 a stream of oil and gas is forced between the separator surfaces of the contacts 1, 7, owing to pressure produced by the arc augmented by the pressure produced by the preliminary break. The stream of gas and oil escapes through the passage 6, so quickly extinguishing the arc formed between these contacts 1, 7. To retain the pressure within the chamber during the switch-opening movement the rod 15 passes upwardly through a gland in a central orifice of the lower insulating-plate 5 of the chamber. In a modified form, Figs. 3 and 4 (not shown), the upper contact 1 is secured directly to the lower end of the insulator bushing, the passage 6 being curved so as to have a lateral outlet.
Patent GB-764858-A (GB)
Title: Manufacture of organic silicon componnds
IPC: C07F7/12
Filed: 1951-08-15
Abstract: Organochlorosilanes are obtained by reacting a chlorinated hydrocarbon and a silicon subchloride having a chlorine content corresponding to less than that of SiCl2 at a temperature of above 200 DEG  C.  The reaction is preferably conducted in the liquid or vapour phase, and/or in the presence of a heavy metal or a heavy metal compound or a mixture thereof.  A halogen and/or a hydrogen halide may be present in the reaction mixture.  In addition, hydrogen or a hydrocarbon gaseous at the reaction temperature, or a mixture of these gases may be present in the reaction mixture.  If desired, the reaction may be carried out at an elevated pressure.  Chlorinated hydrocarbons referred to are methyl chloride, vinyl chloride, chlorobenzene and allyl chloride. The heavy metal may be copper, iron, nickel or cobalt, and the heavy metal compound may be a salt or oxide especially of copper, e.g. a copper chloride or oxide.  In the example methyltrichlorosilane and dimethyldichlorosilane are prepared by reacting methyl chloride and a silicon sub-chloride of the formula Si38Cl42 in the presence of copper at an elevated temperature. Specification 645,230, [Group IV(b)], is referred to.
Patent GB-731577-A (GB)
Title: Improvements in and relating to plate heat exchangers
IPC: C09B69/00
Filed: 1953-07-13
Abstract: 731,577. Plate heat-exchangers. AIR PREHEATER CORPORATION. July 13, 1953 [Sept. 10, 1952] No. 19391/53. Class 64 (3). In a cross-flow type plate heat-exchanger, the fluid passage walls are each built up from a first series of juxtaposed channel members 20 lying in back-to-back contiguous relation to a second series of similar channel members 20 extending in a direction normal to those of the first series so that the web portions of all the channel members combine to form the passage wall with the leg portions of the channels extending therefrom on both sides of the wall as fins 21, the fins on one side of the wall running in a direction normal to those on the other side of the wall, adjacent fluid passage walls being spaced apart by further channel members 22 disposed at the marginal edges of said walls and forming the side closures of each fluid passage. Each series of fins extending from a passage wall may be of uniform size or of differing sizes.
Patent GB-340981-A (GB)
Title: Improvements in or relating to jacketed mixing or the like machines
IPC: B01F15/00
Filed: 1929-06-25
Abstract: 340,981. Jacketed mixing-apparatus. KEMPTER, F., 10, Heinestrasse, Stuttgart, Germany. June 25, 1929, No. 19446. Convention date, Feb. 16. Void [Published under Sect. 91 of the Acts]. [Class 86.] The wall e of a jacketed mixing-vessel is provided on the face forming the inner surface of the jacket with ribs k for increasing the heating or cooling effect.
Patent GB-439647-A (GB)
Title: Improvements in and relating to apparatus for use in practising ball games
IPC: A63B69/00
Filed: 1934-07-02
Abstract: 439,647. Game apparatus. WELLS, R. E., 1, Kenya Flats, Split Road, Mosman, near Sydney, Australia. July 2, 1934, No. 19465. Convention date, July 14, 1933. [Class 132 (ii)] Apparatus for use in practising ball games comprises a pivoted delivery arm for receiving balls one at a time, means for imparting intermittent and complete rotary movement to said arm in a vertical plane, means for accelerating the intermittent movement imparted to the arm, means for imparting spin to the ball, and means for abruptly interrupting the accelerated movement for projecting the ball from the delivery arm. The ball carrying arm 20 is secured to the shaft 17 driven from the electric motor 15 through the belt 18 pulley 19, and non-positive friction clutch 26. During its rotation the arm 20 is stopped by the resilient catch 27, a ball 22 is fed in known automatic manner from the hopper 21 to the end of the arm 20 through gearing driven by the electric motor and the shaft 17 and arm 20 receive an adjustable rapid acceleration through the clutch 50, cam member 48 and cord or wire 53 actuated by means released by mechanism driven from the motor 15. The rotation of the arm 20 is abruptly interrupted, by the arm 33 fast on the shaft 17 contacting with the resilient members 31 32 mounted on the drum 28 loose on the shaft 17, to project the ball. The pitch of the ball can be varied by rotating the crank handle 36 to rotate the worm 35 engaging the peripheral ring gear 34 on the drum 28. The arm continues its rotation until again stopped by the catch 27. Top-spin is imparted to the ball by moving the adjustable stud 38 into the path of the multi-armed rotatable member 39 connected by pulley 41 and cord 43 to pulley 45. Break is imparted to the ball by moving the stud 38 into the path of one or other of the arms of the rotatable member 40 connected by pulley 42 and cord 44 to pulley 47 fast with the ball receiving cup member 46. Means may be provided for varying the intervals elapsing between projection of the balls. The balls may be placed in the arm 20 by hand and the shaft 17 may be rotated manually. The apparatus is mounted on a circular platform 9, partly rotatable through the pinion 11 and toothed rack 13 on the bed 10 constituting a portable base. Channels may be provided around the wicket at which the balls are projected to return them by gravity to the base of the apparatus.
Patent GB-385008-A (GB)
Title: Improvements in or connected with light projection apparatus, such as searchlights, and the like
IPC: F21V7/00
Filed: 1931-07-07
Abstract: 385,008. Searchlights. BARR & STROUD, Ltd. and FRENCH, J. W., Caxton Street, Anniesland, Glasgow. July 7, 1931, No. 19513. [Class 75 (iv).] A light project i o n apparatus, such as a searchlight, is arranged with two or more axial sources of light co-operating with a corresponding number of groups of reflectors. The arrangement is such that each group reflects light from the corresponding source and the light from a rear group passes outwards through spaces between reflectors of the group in front of it. In the form shown in Fig. 1, sources of light are axially arranged at 1, 21 between concentric systems of ring reflectors. The forward system comprises parabolic reflectors diagrammatically represented at 2-3, 6-7 and 16-17. They are so disposed with relation to the source of light 1, the crater of which is forwardly directed to them, that parallel beams 10-11, 12-13, and 14-18 are projected. The rear system comprises reflectors 4-5, 8-9, and 19-20 arranged to receive the backwardly directed rays from the source 21 and to project beams 11-12, 13-14 and a central beam bounded at 18. These beams pass between the beams from the forward system, and form, with them, a solid parallel beam, bounded at 10. In a modification, both systems are forwardly directed, and, in another arrangement, the backwardly directed source is arranged in front of the forwardly directed source, both sets of reflectors being arranged adjacent to each other in a medial position. In the arrangement shown in Fig. 6, the backwardly directed rays from the source 1 pass to their reflectors 4-5, 8-9, 41-42, through the rays from the source 21 passing to the reflectors 2-3, 6-7, 16-17. The reflectors may be arranged with relation to their source as shown in Fig. 7, the outer reflector 8-9 taking the middle portion 8, 9, 21 from the cone of light 4, 21, 20. Portions 31, 32, Fig. 3, of the reflectors which are near a source of light may be cut away. Stiffening pieces may be provided behind reflectors in spaces not traversed by beams of light, or the reflectors may be provided, in these spaces, with water or air-cooling systems.
Patent GB-1140988-A (GB)
Title: Process for the production of polyisobutylene
IPC: C08F10/00
Filed: 1967-04-27
Abstract: 1,140,988. Polymerizing isobutylene. INSTYTUT CIEZKIEJ SYNTEZY ORGANICZNEJ. 27 April, 1967 [29 April, 1966], No. 19518/67. Heading C3P. Polyisobutylene of M.W. 5000 to 50,000 is made by polymerizing isobutylene batchwise or continuously at a temperature of from 0‹ to + 50‹ C. in the presence of a complex catalyst formed from water and an aluminium alkyl halide in a molar ratio in the range of 1 to 6, in a hydrocarbon solvent, subsequently removing the catalyst from the polymer solution by washing with water, or water and alcohol, and then removing the solvent from the polymer solution by a two-stage distillation process of which the second stage is preferably under reduced pressure. The exemplified aluminium compound is diethyl aluminium chloride. The Specification includes a diagram of apparatus suitable for effecting the process.
Patent GB-975978-A (GB)
Title: Improvements relating to data storage
Inventor: MEGGITT JOHN EDWARD
IPC: G11B5/52
Filed: 1962-05-22
Abstract: 975,978. Disc record data storage apparatus. IBM WORLD TRADE LABORATORIES (GREAT BRITAIN) Ltd. Jan. 10, 1963 [May 22, 1962], No. 19590/62. Heading G5R The description of Figs. 1-5 is the same as in Specification 975, 979, but the claims are directed to the means for incrementally processing successive tracks. The description extends to multi-head embodiments providing continuous recording:- Fig. 6 requires slip-rings for the heads, but only one drive means for the heads; Figs. 7 and 8 require three drive means but no slip rings since the partial tracks do not overlap. Fig. 9 is equivalent to the single-head embodiment in Fig. 5 (not shown, but see Specification 975,979). Stacked assemblies of discs with relevant heads and common drive means may be used, particularly where the information on the discs is related in decade manner. The heads are preferably of the type supported over the discs by Bernonilli effect.
Patent GB-274900-A (GB)
Title: Improvements in and relating to processes and apparatus for producing apparently plastic pictorial effects for advertisement, amusement or instructional purposes
IPC: G09F13/12
Filed: 1927-07-23
Abstract: 274,900. Fleischer, F. July 23, 1926, [Convention date]. Scenic and like toys.-Apparatus for producing a scenic effect comprises an inclined transparent mirror 4 located behind an opening 2 in a box 1 divided into two compartments or rows of compartments 5, 6. Horizontally arranged below the mirror 4 are stationary or movable glass plates 7, 8, 9 removably held in guides 10 and provided with transparent or non-transparent representations, or forming screens on which kinematograph or other pictures may be optically projected. In each compartment is a lamp 11, 12, or one or more lamps may be located in apertures in the dividing wall 3. The lamps may be switched on alternately by an automatic switch. Over the lamps are removable colour screens 14, 15, and picture plates 17, 18, 19 may be arranged vertically behind the mirror 4. The plates 7, 8, 9 may be interlaced by an endless band 37, Fig. 7, bearing designs or objects and moved by hand or power, and a similar band may be provided in the rear compartment 6. Openings in the sides of the box 1 may be furnished to receive transparencies illuminated by the lamps 11, 12, and further endless bands may produce an effect of motion thereon. The compartment 6 may be illuminated and may consist of the triangular space behind the mirror 4. A lamp may also be arranged over the plates 7, 8, 9. The Specification as open to inspection under Sect. 91 (3) (a), describes also the arrangement of solid objects on the plates 7, 8, 9. This subjectmatter does not appear in the Specification as accepted.
Patent GB-933171-A (GB)
Title: Apparatus for heating thermoplastic sheets
IPC: B29C51/42
Filed: 1960-06-02
Abstract: 933,171. Heating thermoplastic sheets by electric resistances. E. VOGT, [trading as VOGT & HARTMANN]. June 2, 1960 [June 4, 1959], No. 19597/60. Class 39 (3). [Also in Group V] Apparatus for heating sheets of thermoplastic synthetic material to be shaped, comprises a conveying carriage 40 for supporting a sheet 35 in a predetermined plane, heating elements 52 arranged on one side of the said plane, and a reflection surface arranged on the other side thereof, said reflection surface being secured on the conveying carriage 40 or constructed as the conveying carriage, so that a sheet of said material may rest directly on the said surface during the heating operation. The tunnel oven 46 shown is located between and serves two moulding stations of a vacuum moulding machine (see Group V) and is provided with a bank of infra-red heating elements 52. The carriage 40 has wheels which run on tracks 36 and 37 and its face 41 is made of polished aluminium or aluminium alloy. Infra-red radiation not absorbed on its first passage through the sheet 35 is thus reflected to pass through the sheet a second time. Resistance heating elements 56 (Fig. 4) mounted in recesses in the carriage 40 may serve to supply additional heat to the sheet 35 by conduction while the sheet is in the oven, but serve chiefly to prevent the sheet from freezing to the carriage 40 on emerging from the oven. Recesses 57 communicate with compressed air lines 60 to assist in speedy removal of the heated sheet 35 from the carriage 40. An additional bank of removable infra-red elements (not shown) may be mounted below the carriage 40.