baber/WOPTO huggingface dataset:
Patent GB-1147991-A (GB)
Title: Improvements in or relating to intermeshing-screw type rotary engines
Inventor: LYSHOLM ALF
IPC: F01D1/00
Filed: 1966-05-13
Abstract: 1,147,991. Rotary positive-displacement engines. A. LYSHOLM. May 13, 1966 [May 14, 1965], No.21286/66. Heading F1F. A rotary positive-displacement engine comprises a housing 27, Fig. 3, containing a pair of externally-meshing male and female screw-rotors 23, 24 that are driven by hot gases generated in a fuel-combustion chamber 16, Fig.1, the housing being cooled by a liquid e.g. water flowing through channels 50, 51 in its peripheral wall and further channels (52, 52, 53), Fig.2 (not shown), in its end walls, and hollow shafts 28, 29 for the rotors being cooled by liquid flowing therethrough from a pipe (55) lodged in each of them. The gases aforesaid enter the uppermost part of the housing through a duct (30), a part of which is shown in Fig. 3, the wall of this duct being cooled by air flowing into the housing through a surrounding passage (32) after it has been used to effect cooling of the combustion chamber. The exterior surfaces of the rotors are cooled by air issuing from radial grooves 38 in the high-pressure ends of the rotors, which air enters said grooves through part-circular grooves 34, 35 and 36, 37, respectively, in the adjacent end wall of the housing, the air being supplied by a high-pressure rotary-compressor 12 of the intermeshing-screw type and a lowpressure rotary-compressor 10 of the axial-flow type through pipes 17, 18 connected to the grooves 34, 36 and 35, 37, respectively. Additional radial grooves 39 for the cooling air may be formed in the high-pressure ends of the rotors, and said air may also enter passages (40), 41 (42) in the rotors to flow over the external surfaces of the latter by way of holes beneath radial seals 43. Air for the combustion process is supplied to the chamber 16 by the compressors 10, 12, which are connected in series with each other through an intercooler 14, the air being preheated in a heat-exchanger 15 connected to the outlet of an exhaust-gas turbine 11 for driving the compressor 10. The compressor 12 is driven by the rotor 34; and the turbine 11 receives gases from the housing 27 through a separate outlet (56) adjacent a main outlet (57). Steam generated in cooling water may be used to drive a turbine (not shown) or be utilized to drive the rotors 23, 24.
Patent GB-785994-A (GB)
Title: Improved fluid coking process
IPC: C10B55/10
Filed: 1955-07-22
Abstract: <PICT:0785994/III/1> In a hydrocarbon oil conversion process wherein a coking charge stock is contacted with a fluidized bed of particles at coking temperature, and wherein lighter hydrocarbon vapours are withdrawn overhead, an entrainment of particles in the vapours is maintained at above 400 lbs. per barrel of charge stock.  The oil, which may be a residuum boiling above 900 DEG  F., is fed through a pipe 3 to the bed in a vessel 1.  The bed is coke particles, but may be sand, spent catalyst or pumice, and is maintained at a temperature between 850 DEG  and 1600 DEG  F., by circulating some of the particles by a line 7 to a burner 2, where they are heated to 100 DEG to 300 DEG  F. higher than the coking temperature, and returned by a line 10.  Steam is admitted by a line 4 to strip coke particles before they are circulated to burner 2, and to fluidize the bed. Reaction products are taken off by a line 5 after removal of entrained solids by a cyclone 6.  Coke deposition is prevented in the area between fluid bed level L and an inlet C to the cyclone 6, and reduced in the equipment beyond C, by maintaining an entrainment of solids between 400 and 800 lbs. per barrel of stock charged to the coker, in the vapour above level L.  This is achieved by suitable choice of particle size (preferably 40 to 500 microns) and size distribution of the fluidized bed, and by control of the fluidizing gas velocity through the surface L.  The latter is controlled mainly by varying the surface area of the fluid bed by altering the amount of solid in the bed so that the level L is moved up or down in a tapered portion of the reactor, i.e. by raising the level L the area is reduced and the gas velocity through it is increased.  The velocity may also be controlled by varying the amount of fluidizing steam used and the rate of oil feed.
Patent GB-320873-A (GB)
Title: Improvements in sound-reproducing apparatus
IPC: H04R1/34
Filed: 1928-07-23
Abstract: 320,873. Columbia Graphophone Co., Ltd., Forse, W. T., and Mitchell, F. A. July 23, 1928. Loud-speakers; magnetic instruments; diaphragms.-A moving coil loud-speaker has a conical diaphragm D whose apex projects into a rigid projection 'T which is flexibly mounted, the flexible member S being located in a plane intersecting the axis of the cone beyond the apex of the cone. The projection is flexibly mounted by fabric S or cords so as to provide for lateral adjustment of the moving coil C in the air gap M. The plane of the flexible mounting S may be between the coil and the apex of the cone, and the mounting is such that air-cushioning effects are minimized. The diaphragm D may operate into an acoustic chamber H as in Fig. 3 and may be free or flexibly mounted by means of oiled silk, leather, or cloth, &c. at its periphery. Specification 321,644, [Class 40 (v), Wireless signalling &c.], is referred to. The Provisional Specification refers to Specification 300,679.
Patent GB-578317-A (GB)
Title: A work-holding attachment for use in the precision machining of surfaces as by grinding
IPC: B23Q3/00
Filed: 1943-12-20
Abstract: 578,317. Work-holders. HOLMES, H. Dec. 20, 1943, No. 21323. [Class 60] A work-holding attachment for machining surfaces as by grinding comprises a base on which is a headstock carrying a spindle having mounted thereon a plate provided with projections whereby, by the use of a slip gauge, the angular position of the plate may be set, means also being provided for locating the work-piece in relation to the base. The base plate 1, Fig. 1, has therein a longitudinal locating slot 2 to receive a tenon on a headstock 3, in the form of a block, which is secured by dowels and a screw 4. Rotatable in the headstock is a spindle 5 having shoulders to coincide with the end faces of the headstock, the reduced projecting end portions of the spindle being screw-threaded, and the outer end having secured thereon a sine plate 6. The plate 6 has four equidistantly spaced projecting pins 7, so that the plate and spindle can be set to a desired angle by means of slip gauges placed between the pins and the base. A tailstock 8 also is similarly secured to the base 1 and carries a shouldered spindle 10 carrying a bracket 11, the spindle being hollow to carry a centre 12 adjustable by nuts 13,14 co-operating with the bracket 11 ; a centre 15 with a tapered shank also fits, without longitudinal adjustment, in the spindle 5. The work-piece is carried by a cradle fixed to spindles 5, 10 and comprising ends 16, 17 and a table portion 18 having its upper face accurately finished and provided with a slot for a work locating key 20, and with tapped holes 21 for attachment of locating plates ; the height of the work on the cradle is adjusted by means of a gauge 22 held between the centres 12, 15 and the use of slip gauges, and with the arrangement described, a flat surface at some desired angular position may be ground on the work. The headstock is provided with two wing plates 25, one at each side, which can be used as a base by removal of the headstock from the base 1. for forming a prescribed radius on a grinding wheel. For this purpose, a plate 26, Fig. 5, is secured by a screw 27 to the spindle 5 and carries a bracket 28, located by a key 29 and plate 30, a diamond holder. 31 being fixed in the bracket with its point at'the required distance from the axis of the spindle 5 ; this distance is set by a gauge 32 fitting in the spindle and having a flat surface 33 coincident with the spindle axis, and the use of a slip gauge.
Patent GB-223881-A (GB)
Title: Improvements in or relating to door control mechanism
IPC: E05F3/02
Filed: 1924-09-09
Abstract: 223,881. Elevator Supplies Co., Inc., (Assignees of Weeks, W. W.). Oct. 25, 1923, [Convention date]. Pneumatic actuation; sparking, preventing.-In lift doors actuated pneumatically, the actuating mechanism contains a switch which opens the circuit of the hoisting motor when the door is opened, and currents of compressed air aredirected across the switch terminals to reducearcing. The door is attached to the rod 6 of a. plunger 8 working in a cylinder 10 containing oil which is attached to a larger cylinder 2 containing a compression spring. A passage 22 controlled by a screw 26 connects the bottom of the cylinder 10 with a part 28 of greater diameter which is connected by a passage 30 to an oil reservoir 20. A spring-retaining member and piston 4 attached to the rod 6 is attached to a. ring 52 of insulating material in which a.re mounted pins 54, 56 attached to a conducting ring 50. Springs 62, 64 maintain the ring 50 in contact with the enlarged heads of terminals 36, 38 until the door has been opened sufficiently for the shoulders on the passages in the ring 52 to engage the heads of the pins 54, 56. The door is opened by admitting compressed air through the pipe 66 to the space below the piston 4. The air issuing from the apertures 70, 72, Fig. 3, in the end of the pipe 66 passes over the terminals 36, 38 and decreases arcing. The terminals are preferably enclosed in a box 48, Fig. 2. In a modification the terminals are on opposite sides of theapparatus.
Patent GB-806983-A (GB)
Title: Improvements relating to controllers for split-phase electric motors
Inventor: TEASELL RONALD HAROLD
IPC: H01H50/20
Filed: 1956-07-10
Abstract: 806,983. Electromagnetic switches; control of A.C. motors. GENERAL MOTORS Ltd. June 21, 1957 [July 10, 1956], No. 21340/56. Classes 38 (5) and 38 (3). A split-phase motor starting relay has its solenoid coil 53 in series with the main motor winding 74, a protective bi-metal strip 4 and heater 19 controlling contacts 3, 5. When energized, the solenoid attracts an armature 42, the weight of which normally holds a strip spring 29 against its bias, so that contacts 46, 47 can close to energize the starting winding 85. In its upward movement the armature engages the bent end 36 of a resilient member 31 (Fig. 2) and closes contacts 25, 30 to short-out part of the coil 53. The reduction of the attractive force on the armature and the resilience of the member 31 cause the armature to move downward and as the starting current in the motor winding also falls the armature drops to open the contacts 46, 47. The contacts 25, 30 do not open immediately, since the main winding current passes along one limb 24a of a bi-metallic member 24 carrying the contact 25 so that the heating of the member 24 causes the contact 25 initially to follow the contact 31. An adjustable stop-screw 43 limits the movement of the armature 42 and spring 29. In a modification (Fig. 4) the contacts 25, 30 are omitted and the armature 42, in its upper position strikes a rivet 36A carried on a resilient bimetallic arm 31A carrying the total current and which is bent down on heating to assist in restoring the armature.
Patent GB-726390-A (GB)
Title: Improvements in or relating to adjustable and replaceable heel treads for boots and shoes
Inventor: TETZNER HELLMUT WERNER
IPC: A43B21/39
Filed: 1953-07-31
Abstract: 726,390. Heel protectors. GISSAS, G. July 31, 1953, No. 21347/53. Addition to 702,385. Class 17 (3). The detachable fastening device of the parent Specification as applied to the attachment of a heel patch to a heel stump is modified by the provision of raised ledges 8 on the heel stump which extend round its edge 9 and divide it into several panels 7. Thus, when the patch is attached, the two parts are held under some compression which helps to make the joint between them watertight and an air cushion is formed between the tops of the ribs of the patch and the grooves 3.
Patent GB-587053-A (GB)
Title: Improvements in or relating to extracting tannin-containing materials from cocoa bean husk
IPC: C08H5/00
Filed: 1944-11-01
Abstract: Cocoa bean husk is treated with hot water under a pressure from atmospheric up to 70, but preferably 30, lbs./sq. inch, e.g., by injecting steam directly into the aqueous mixture in a closed vessel, to extract a mixture containing tannin, protein, and carbohydrate. The pressure is preferably released as soon as it reaches that of the injection steam and the extract separated from the residue.  The extract may be used to flocculate colloidal or semicolloidal solutions, to inhibit crystallization from saturated solutions, or its active constituents may be concentrated. Specifications 587,052 and 587,054, [both in Group III], are referred to.
Patent GB-1533723-A (GB)
Title: Method for constructing a flotation concentration plant
IPC: B03D1/00
Filed: 1976-05-24
Abstract: 1533723 Froth flotation A NIEMI 24 May 1976 [26 May 1975] 21395/76 Heading B2H In the design of a continuously operable froth flotation plant the relationship between a flotation rate coefficient and the degree of adsorption of the collecting agent is used in calculating parameters of the plant. To determine the said relationship, an aqueous suspension of a mineral has added thereto a collecting agent in an amount less than that required to form a monomolecular layer on the mineral grains. After the collecting agent has been completely adsorbed the mineral is subjected to flotation and the floating mineral grains separated at time intervals to determine the flotation rate coefficient. The process is then repeated using a different amount of collecting agent to determine the said relationship. The relationship is determined for each grain size and mineral species to be treated in the flotation plant and the relationship used to determine, by means of a predetermined simulation procedure, the distribution of the material into concentrates, wastes and middlings for different circuits and different process parameters.
Patent GB-999896-A (GB)
Title: A process for the preparation of vinyl ether alcohols and/or vinyl ether amines
IPC: C07D309/26
Filed: 1963-05-31
Abstract: A vinyl ether alcohol and/or a vinyl ether amine are prepared by reacting a vinyl ether carbonyl compound with hydrogen under pressure in the presence of a hydrogenation catalyst and ammonia or an amine, the carbonyl compound having the formula <FORM:0999896/C2/1> in which each group R individually represents a hydrogen atom, an aldehyde group, a carbonyl substituted hydrocarbon group, a carboxyl group, a cycloaliphatic group containing 3-9 carbon atoms in the ring, a C1-C15 alkyl group, a C6-C30 aryl group, or a C1-C15 alkoxy group, at least one group R containing a carbonyl group and any two groups R being optionally joined to form with one or both carbon atoms of the vinyl group a carbocyclic group containing 3-8 carbon atoms in the ring or to form together with one or both carbon atoms of the vinyl group and the ether oxygen atom a heterocyclic ring containing only one double bond.  To obtain predominantly vinyl ether amines the hydrogen pressure should be kept between 200 and 600 p.s.i.g. and the molar ratio of hydrogen to the vinyl ether carbonyl compound should be between 1 and 30. To obtain predominantly vinyl ether alcohols the hydrogen pressure should be kept between 600 and 2000 p.s.i.g. and the molar ratio of hydrogen to ammonia or amine should be between 10 and 1000. Suitable catalysts are, for example, platinum, chromium, nickel, chrome nickel and Raney nickel.  The process may be carried out in the presence or absence of a solvent, e.g. an alcohol or an inert hydrocarbon or an ether.  Suitable vinyl ether carbonyl compounds for use as starting materials are, for example, acrolein thermal dimer (3,4 - dihydro - 1,2 - pyran - 2 - aldehyde), methacrolein dimer (2,5-dimethyl-3,4-dihydro-1,2 - pyran - 2 - aldehyde), 4 - ethoxy - 3 - buten - 2 - one, 4 - methoxy - 3 - methyl - 3 - buten -2-one and dihydropyrano having the formula <FORM:0999896/C2/2> in which R is as defined above.  The amines used may be primary, secondary or tertiary. Examples are given of the conversion of (a) acrolein thermal dimer to dihydropyran-2-methanol and (b) acrolein thermal dimer to dihydropyran-2-methylamine.
Patent GB-222131-A (GB)
IPC: H02J3/06
Filed: 1924-09-17
Abstract: 222,131. International General Electric Co., Inc., (Assignees of Allgemeine Elektricitõts-Ges.). Sept. 18, 1923, [Convention date]. Systems depending on the use of static transformers. - A consumption circuit is connected to an alternating electric supply circuit through a tuned or approximately tuned series oscillatory circuit, and stray capacity currents are rendered ineffective by incorporating them in tuned shunt oscillatory circuits. The invention as applied to a single phase system is shown in Fig. 5. The supply mains a, b are connected to electrodes d, e through capacities c<1>, c<2>. Between these electrodes are situated tuning inductances L<1>, L<2> and a consumption circuit T, for example a transformer. The tuning is effected so that the sum of the impedances due to the capacities equals that due to the inductances. The stray capacities between the electrodes d, e and between each of these and earth are equivalent to the capacities c<3>, c<4>, c<5> and are rendered ineffective by tuning with shunt inductances L<3>, L<4>, L<5>, which may be incorporated into a single inductance. In a similar manner the invention can be applied to a three phase system. In some cases there may be stray capacities between the electrodes and the supply line, these can be compensated for by providing a neutral electrode 0, the stray capacities 2c<6>, 2c<7> between the electrodes d:, e and the supply line being rendered ineffective by tuning with shunt inductances L<6>, L', which together with the inductances L<3>, L<4>, L' may be combined into a single inductance. Fig. 7 shows an example of unipolar abstraction of energy from a single phase system a, b, and if the system has an earthed neutral point, the tuned circuit C<3>, L<3> is omitted.
Patent GB-677304-A (GB)
Title: Apparatus for indicating the grinding slit adjustment in roller mills
IPC: B02C4/32
Filed: 1950-09-07
Abstract: 677,304. Roller mills. MIAG VERTRIEBRGES. Sept. 7, 1950 [Sept. 10, 1949], No. 22024/50. Class 59 Apparatus for indicating the grinding slit width in roller mills comprises a nut 6 which is movable along a member 7 towards or away from the hub 10 of a handwheel 11, a mark or graduation 12 provided on the hub co-operating with a graduation 13 on the nut. The latter is adapted to swing a forked lever 5 fastened on an eccentric shaft 4 connected through a bar 3 to lever bearings 2 holding the loose roller 1. A vernier graduation may be marked on the edge of the hub for co-operation with a reference mark 14 on the nut. The graduation may be fitted upon bushes connected to the adjustment members or upon extensions of the adjustment members.
Patent GB-209004-A (GB)
Title: Improvements in and relating to chucks
IPC: B23B31/00
Filed: 1922-07-25
Abstract: 209,004. Marks, E. C. R., (Bock Bearing Co.). July 25, 1922. Chucks.-A chuck comprises a rotary hollow spindle 85 held by lock nuts 91 in which is slidably mounted a sleeve 105 carrying a bevelled cap 106 which is pressed on to an axially fixed collet 109 by means of pivoted arms 120 and a sliding ring 123. Springs 126 and 114<1> release the sleeve. The collet is secured to a bar 113 which is adjustably attached to a cap 114 on the spindle. The article A to be gripped is pushed into the chuck and accurately positioned by a member 175 against the action of a spring 128 which acts as an ejector when the chuck is released, the ring 123 and the member 175 being actuated in timed relationship. The spindle, which has a rotary thrust collar 90, is mounted in two identical bearings, each comprising a split sleeve 86 which is adjusted by a bolt 95, wear being taken up by a bush 97 having a conical interior and cylindrical exterior. Lock nuts 103 prevent end motion, and caps 104, 116 prevent access of dirt. The spindle is driven at 130 and is mounted on a slide 83 carried by a bracket 82 pivoted at 79.
Patent GB-320962-A (GB)
Title: Improvements in gramophone records and methods of manufacture thereof
IPC: G11B3/70
Filed: 1928-07-31
Abstract: 320,962. Thornton, J. E. July 31, 1928. Addition to 319,038. Multiple superposed coatings, - Gramophone records of the kind claimed in the parent Specification, instead of having a core or base of paper, are made with a foundation of textile material, which is impregnated with and provided if required with one or more additional layers of glue or gelatine. This is chemically hardened and dried, and sound-grooves are subsequently impressed thereon. The textile base, which may be used in single sheets or in the form of a web, may consist of cotton or linen, artificial or real silk, or any other suitable woven material. A preferred method of manufacture is as follows. A filling of glue or gelatine (preferably cheap glue), which may be mixed with substances such as barium sulphate, French white, &c., is first applied to the fabric, after which the web is passed between pressure rollers, to force the colloid into the meshes. Successive coatings are then applied, with rolling after each, the upper layer or layers being of finer quality of material than the lower. Heavy rollers are used in the later stages, with the web nearly or quite dry and hard. After coating, the colloid is chilled by a cold air blast, or by passing the web round a cooled drum, and the web is then dried in a warm atmosphere. In an alternative process, two webs of waxed paper, celluloid, or other waterproof material, forming temporary supports, are coated with a layer of colloid. When this is set but still soft and wet, the textile foundation is passed between the two webs, and the whole is squeezed together between rollers. The composite web is then hung up, and when it is dry the two temporary supports are stripped off by winding on to separate reels, the finished colloidtextile web being wound on to another. A flexing agent such as molasses may be employed in the colloid mixture, and various methods of chemical hardening such as are described in the parent Specification may be adopted. The degrees of hardness of the various layers may be made different, by using different proportions of the flexing and hardening agents, the filling adjacent to the textile core being, for example, rendered very hard and stiff.