baber/WOPTO huggingface dataset:
Patent GB-578038-A (GB)
Title: Improvements in or relating to adjusting means for brakes
IPC: F16D65/22
Filed: 1944-11-06
Abstract: 578,038. Brakes. AUTOMOTIVE PRODUCTS CO., Ltd., and PARNELL, F. G. Nov. 6, 1944, No. 21774. [Class 103 (i)] An adjusting device for a brake shoe or other brake friction element comprises a split resilient ring frictionally engaging one member on which it is displaced by excessive application movement of the friction element and abutting on a surface on a second member to locate the friction element in its off position, the surface being chamfered to increase the frictional engagement of the ring with the first member. A brake is shown comprising a pair of fixed diametrically arranged hydraulic cylinders, each formed with an arcuate slot 15 providing the pivotal mounting for one of a pair of shoes, one .end of the other shoe being connected to the piston 16. A seal 18 and a filler 19 are provided. A resilient split ring 26 grips the piston with which it moves outwardly in an application until it engages the face 25 of a collar 23, and if wear of the friction lining occurs the piston moves through the ring. In release the piston returns with the shoe and the ring until the chamfered face 27 on the ring engages a correspondingly shaped face 22 on the cylinder. The ring is tapered in radial width towards its ends and the chamfered face 27 may be concentric either with the inner or outer diameter of the ring; in the latter case the engagement with the face 22 is only at a point at mid-length of the ring which tends to tilt the ring relatively to the piston and increase the grip. In a modification as applied to a brake comprising a pair of shoes pivoted at adjacent ends and operated by a cylinder having a pair of pistons respectively engaging the other ends, the adjusting device comprises for each shoe a telescopic link pivoted at its ends to the back plate and to the shoe, a ring such as 26 being provided on the inner member of the link. In a further construction, Fig. 6, the ring 26 grips a sleeve 47 and is urged by a spring 50 into permanent engagement with the face 22. In an application the piston moves relatively to the sleeve until the clearance between the piston shoulder 48 and the sleeve is taken up. With further movement of the piston due to wear of the shoes, the sleeve is pushed through the ring 26. The ring instead of frictionally engaging an inner member such as piston 16 may engage the outer member or cylinder the recess such as is provided by the collar 23 being formed in the inner member and the chamfered face of the ring on its inner side. In brakes that are operated by a transversely moving wedge acting on the shoe ends through tappets, the tappets may be provided with the adjusting device.
Patent GB-532814-A (GB)
Title: Improvements relating to the optical projection of images
IPC: G03B21/13
Filed: 1939-07-27
Abstract: 532,814. Optical-projection apparatus. BRITISH THOMSON-HOUSTON CO., Ltd., and BOWEN, A. July 27, 1939, No. 21812. [Class 97 (i)] Apertured concave and convex reflectors 9, 8 spaced in succession between the projection lens 5 and screen 6 reflect fringing rays of the projection beam to form an illuminated image surround on the screen. The aperture in the reflector 8 may be rectangular, the ratio of its dimensions being similar to that of the image dimensions ; the aperture in the reflector 9 may be circular.
Patent GB-644801-A (GB)
Title: Improvements in power-driven agricultural and other apparatus
IPC: A01D34/47
Filed: 1947-08-08
Abstract: 644,801. Motor-vehicles. ROSE, A. G. Aug. 8, 1947, No. 21901. [Classes 79 (i), 79 (ii), 79 (iii) and 79(v)] [Also in Groups I and XXIX] In power-driven agricultural or other apparatus of the kind adapted to be controlled by an operator walking with the apparatus, wherein rotation of a driving wheel or like driving member 13, is effected by a hydraulic motor 26 under the influence of a slidable operating-member 52, the latter is adapted, upon movement, to operate a hydraulic valve 34 connecting the motor 26 to a pump 27, and so control the action of the motor to cause the driving member 13 to rotate. The cutting cylinder 10 and differentially-coupled driving members or rollers 13 of a lawn mower are driven through a differential gear and a chain drive from the sliding-vane type motor 26. The pump 27 is coupled to an internal-combustion engine 31, draws from a sump 32 and supplies liquid to the valve 34 through a relief valve 37 which leads back to the sump 32. The position of the valve 34 not only controls the forward or reverse direction of the mower but also its rate of movement. The valve 34 is operated through a lever 42, rod 43 and a cross-shaft 46 attached to each of the two handles of the machine. Each handle comprises the member 52 which is axially slidable, against its spring, in either direction from a neutral or stop position to move the shaft 46 and hence operate valve 24. When the members 52 are released they will be automatically returned to the neutral position and the machine will stop. In order that the mower may be readily moved by hand when the engine is inoperative the sprockets of the chain drive may rotate freely on their shafts after spring-loaded driving-pins have been manually released. The hand grips may be rotated as well as moved axially to provide for the differential control of a pair of hydraulic motors by an auxiliary valve. The Provisional Specification describes the invention as applied to a plough. Specification 577,922, [Group XXIX], is referred to.
Patent GB-1516475-A (GB)
Title: Composite zinc-aluminium dispersion electro plated steel sheet and a method of producing same
IPC: C25D15/02
Filed: 1976-05-26
Abstract: 1516475 Composite Zn-Al electro-deposition KAWASAKI STEEL CORP 26 May 1976 [5 June 1975] 21944/76 Heading C7B A steel sheet is electro-plated with Zn from a bath containing dispersed Al, whereby a composite coating containing e.g. 1À5-70 wt. per cent of Al is obtained. Agitation is necessary during plating. From 5-300 g/l of Al powder of diameter less than 147 Ám may be added. The product may be rolled to reduce the thickness by 1-5% and thereafter be heat-treated by resistance heating to diffuse the Al and Zn into an alloy (conditions in Fig. 4 not shown).
Patent GB-1469424-A (GB)
Title: Fibre-reinforced cementitious board
IPC: C04B28/00
Filed: 1974-05-17
Abstract: 1469424 Moulding fibre-cement boards ONODA CEMENT CO Ltd 17 May 1974 [21 May 1973] 22046/74 Heading B5A Particles of cementitious material are agglomerated with water to produce granules having a diameter of (1-10) mm., the agglomerate is mixed with fibrous material, and this mixture is compacted to form boarding. As described, measured quantities of cementitious particles 1 are fed to a pelletizing pan, drum, or vibrator 7, for agglomeration with water or an aqueous solution 4. The agglomerate is mixed with fibres 11 in a vaned drum, screw, or pan mixer 10, and then fed on to an endless belt 16. Water is added from a spray 14, and compression applied continuously or intermittently by rollers and belts (17-20). A cutter 22 divides the boarding for issue to a curing chamber 23. Materials.-Portland, alumina, magnesia or blast-furnace cement; calcium sulphate hemihydrate; glass, vegetable or organic fibres; wood wool; asbestos; rock wool; silica; dolomite; bentonite; fly ash; swelling agent; light weight aggregate; setting regulator.
Patent GB-383596-A (GB)
Title: Improvements in and relating to disc clutches
IPC: F16D13/52
Filed: 1932-08-05
Abstract: 383,596. Friction clutches. FICHTEL & SACHS AKT.-GES., Schweinfurt, Germany. Aug. 5, 1932, No. 22063. Convention date, Aug. 5, 1931. [Class 80 (ii).] An abutment disc 15 for the springs 13 of a multi-disc clutch is non-rotatably.and non- slidably held in the clutch-casing 7 by releasable flat connecting-members 17 held in position by the springs. The cranked outer ends of the connecting-members 17 engage slots 15a in the abutment disc and 16b in the casing, whilst its inner ends are retained by lips 18 turned over from the inner periphery of the abutment disc. Screws 19 provide further security and prevent radial movement of the connecting-members. The dished centre of the outermost disc 5a of the clutch projects within a central aperture in the abutment disc and carries an adjusting-screw 24 engaged by a withdrawal rod 20 operated by a transverse, rotatable, cam-faced bolt 22. The driven clutch-discs 6 have inserts 6a of felt, leather or rubber. The clutch is contained in the gear box of a motor cycle, the withdrawal rod 20 passing through the mainshaft of the gear. The clutch-casing 7 is attached to a driving toothed wheel 8 revoluble on the shaft.
Patent GB-1481507-A (GB)
Title: Process for the manufacture of formyl compounds
IPC: B01J31/22
Filed: 1976-05-27
Abstract: 1481507 Formyl compounds F HOFFMANNLA ROCHE & CO AG 27 May 1976 [28 May 1975] 22076/76 Headings C2C and C2P Formyl compounds of formula where R represents an alkyl or aryl group, are prepared by reacting a biscarboxylic acid ester of but-2-ene-1,4-dio with hydrogen and carbon monoxide. in the presence of a rhodium catalyst at 50-100‹ C. and 30-150 atmospheres. The formyl compound may be pyrolysed at 70-250‹ C. to which may be isomerized to a carboxylic acid ester of γ-hydroxy-tiglic aldehyde Examples describe the preparation of a suitable catalyst, hydrido-carbonyl-tris-(triphenylphosphine) -rhodium (I) and the novel compound 1,4- diacetoxy-2-formylbutane, followed by the preparation of 2-formyl-4-acetoxybut- 1 -ene and the isomerization to γ-acetoxy-tiglic aldehyde. Hydrido - carbonyl - tris - (triphenylphosphine)- rhodium (I) is prepared by refluxing triphenylphosphine in ethanol and adding an ethanol solution of rhodium trichloride, ethanol, formalin, and sodium borohydride in ethanol. The precipitate is washed and air dried.
Patent GB-1063003-A (GB)
Title: Improvements in bistable device
IPC: H03K3/286
Filed: 1965-05-25
Abstract: 1,063,003. Bi-stable circuits. GENERAL ELECTRIC CO. May 25, 1965 [June 29, 1964], No. 22079/65. Heading H3T. A bi-stable circuit with crosscoupled transistors has input data applied via a circuit device to the collector of one transistor and clock pulses applied to both emitters. In Fig. 1 binary data signals of +2 v. (" 0 ") or +4 v. (" 1 ") are applied via resistor 23 to the collector of transistor 11 and a fixed voltage of + 3 v. is applied via resistor 25 to the collector of transistor 17 so that transistor 11 conducts in the " 0 " state and 17 conducts in the " 1 " state. Narrow " read-in " clock pulses of + 4 v. are applied at 44 to the emitters at times during the occurrence of the data signals and cause the circuit to change over as appropriate. The charge on the base-collector capacitance 40 or 41 of the non- conducting transistor supplies additional base current to speed up the change even if the clock pulse has a sloping edge. The data bit registered can be read out at terminal 35 or its complement at terminal 55. If the latter facility is not required resistor 59 can be replaced by a direct connection. For some transistors both resistors 29 and 59 can be replaced by direct connections. Further binary signals can be read in at terminal 26, e.g. the complements of those applied at 24. For reading out, the clock pulse has a third level (e.g. - 3 v.) which occurs in between the binary input signals, and this may be used for reading out from a number of bi-stable circuits simultaneously. For this purpose the circuit of Fig. 1 is connected via a diode 31 to the output terminal 34, and other bi-stable circuits are connected to the same point via separate diodes 38. A similar arrangement of diodes 57, 60 can be included at the complementary read-out point. In a modification (Fig. 5, not shown) resistors 23 and 25 are replaced by diodes and a constant current source feeds each collector; this gives faster operation. Either circuit can be constructed in a single chip of material, the emitter, base and collector of each NPN transistor forming separate zones in a block of P-type material. The effect of distributed capacitance between the collectors and the block is avoided by connecting the emitters to the block through a capacitance 78 (Fig. 5, not shown) and applying - 3 v. to the block through an inductance 79. The potential of the block then changes in synchronism with the clock pulses.
Patent GB-813190-A (GB)
Title: Improvements in and relating to clothes drying apparatus
IPC: D06F34/08
Filed: 1956-07-17
Abstract: 813,190. Drying clothes. GENERAL ELECTRIC CO. July 17, 1956 [July 19, 1955], No. 22115/56. Class 34(2) [Also in Group XXXVII] In a clothes drying matchine comprising a rotary drum 5, Fig. 1, having a perforate back 19 and an opening 13 in the front, a blower 16 for circulating air through the drum from the back to the 'front, and a perforate air exhaust duct 20 at the front, the supply of current to the motor driving the drum and the blower and to the heating element disposed behind the drum is controlled by a switch 23 situated in the duct 20 and having a bimetal element which controls the position of a snap-action spring which, in one operative position, closes the circuits of the motor and the heater and in another opens the heater circuit, so that the clothes are subjected to a flow of cooling air before removal from the drum. The switch comprises a metal box having insulated end walls 31, 35, Fig. 4, a bimetal member 34 connected to one end of a snap-action spring 33 having contacts 27 on its opposite faces, the other end of the spring being engaged in a notch in the wall 31, contacts 24, 25, 26 serviced by arms 28, 29, 30, a resilient latch 37 for holding the spring in an inoperative position and an adjusting stem 43 having a knob 42 and in threaded engagement with a slide 45 located in a socket 46. 'The motor circuit includes a switch 56, closed when the door 12 of the machine is closed, a speed governor switch 60, main and starting motor windings 57, 58 and a fuzible link 62, while the circuit of the heating elements 17 'includes a safety thermostat switch 64 and the governor switch. When the machine is inoperative and the temperature therein low, the spring, which -has a natural bias upwards, is held in the position shown in Fig. 2 by the latch 37 which projects through a slot 40 in the spring. When it is desired to operate the machine the knob 42 is pressed inwards to release the spring which assumes the position shown in Fig. 3 in which the motor and heating element circuits are closed. As the motor speeds up the governor switch 60 breaks the circuit through the motor starting winding and makes that through the heating element. On completion of the drying, the spring flexes to the position shown in Fig. 4 thus breaking the heating element circuit but having the motor circuit closed, so that a stream of cool air passes through the drum.
Patent GB-337002-A (GB)
Title: Improvements in or relating to discharge tubes
IPC: H01J61/70
Filed: 1929-07-18
Abstract: 337,002. White, A. E., (Claude Neon Lights, Inc.). July 18, 1929. Vacuum tubes. - In a positive-column lamp with an indirectly-heated cathode coated with electron-emitting material, the cathode is heated by a heater which can be inserted and removed without breaking the seal of the tube. For this purpose the cathode 8 is formed as a closed tube with a flaring end 11 attached to the bulb 7 of the vacuum tube by an annular seal 12. The heater is formed of a wire 20 wound on a refractory rod which can be introduced into the tube 8 through its flaring end. The tube may have an electrode of this type at each end and be supplied with high-tension alternating current from a transformer.
Patent GB-878056-A (GB)
Title: Improvements in or relating to slide rules
IPC: G06G1/12
Filed: 1956-07-18
Abstract: 878,056. Slide rules. BOARDMAN, H., and THORNTON Ltd., A.G. Oct. 8, 1957 [July 18, 1956], No. 22180/56. Class 106 (1). A logarithmic slide rule bears special scales to facilitate the solution of quadratic equations. The quadratic equations x<SP>2</SP> Œ bx + c = o and x<SP>2</SP> Œ bx - c = o have related equations Q<SP>2</SP> Œ N s Q + 1 = O and Q<SP>2</SP> Œ N D Q 1 = O, where N s  and N D  = b#c. The expressions giving the roots of these equations involve one variable only (N S  or N D ) and the slide rule, which has the usual A, B, C and D scales, is provided adjacent to the D scale with logarithmic scales of N S  and N D  so drawn with respect to the D scale that for any value of N S  or N D  within the range of the scales, the corresponding value for Q may be read on the D scale opposite the given value on the Ns or N D  scale. In use, the value of Ns or N D  is first found from the known values of band c using the D and B scales in the normal manner. Then using this value on the appropriate N S  or N D  scale, Q may be read, or by using a reciprocal square scale RB, which is preferably provided on the slide, one of the roots of the original equation which is given by x = Q#c may be found. The other root may then be found using the C and D scales. The special scales are used to find real roots only, and a conventional scale #(s) corresponding to a function #<SP>1</SP> - S<SP>2</SP> may be marked on the stock for use in evaluating complex roots. Special scales may also be provided for the solution of cubic equations. The cubic equation x<SP>3</SP> + ax<SP>2</SP> + bx + c = O has a related equation Z<SP>3</SP> - HZ + 1 = O, where H can be found in terms of a, band c. The expressions for the roots of this equation again involve only one variable (H) and consequently a scale can be constructed relating H and Z (read on the D scale). As shown, the scale is drawn in five ranges Hon and Hnm on the stock and, for convenience, Hpq, Hqr and Hrs on the rear of the slide. The latter three scales are read against an index line in a window on the rear of the stock, the corresponding Z values being read on the D scale against the end of the C scale. From the values of Z, the corresponding values of x may be found from an equation relating x, Z, a, band c. To facilitate the calculation of H, a cube scale F is provided on the stock. Specification 878,057 is referred to.
Patent GB-1472657-A (GB)
Title: Hydraulic steering assembly
IPC: B62D5/09
Filed: 1974-05-17
Abstract: 1472657 Power steering systems DANFOSS AS 17 May 1974 [19 May 1973] 22185/74 Heading B7H A power steering system includes a control valve 16 which is returned to its neutral position after the steering actuators have performed a predetermined steering movement, supply fluid to the actuators being returned to drain when the valve is in the neutral position by a by-pass circuit. A valve 16 is moved to one of two operative positions to allow fluid flow from a pump 17 to the main actuators 2, 3 by an auxiliary actuating circuit 9, which includes a pump 12, a valve 11 controlled by the steering wheel and lines 13, 14 connected to auxiliary actuators 4, 5. Fluid in lines 13, 14 is supplied to either end of the valve 16 to cause movement thereof via a valve 36. After a predetermined degree of movement of the main actuators 2, 3 one of two valves 7 or 8 is opened to allow flow from the higher pressure line of lines 13 and 14 to act on and close valve 36. Closure of valve 36 equalizes the pressure applied through lines 31, 32 to the ends of the valve and the valve returns to the neutral position. With valve 16 in the neutral position the supply is by-passed to drain via lines 44, 46, 42, 50 and a valve passage 49 or via valve 45. A pressure relief valve 53 is also connected between lines 46 and 42.
Patent GB-838771-A (GB)
Title: 4,5-epoxy-3-ketosteroid compounds and the preparation thereof
IPC: C07J75/00
Filed: 1956-07-18
Abstract: The invention comprises 4a ,5- and 4b ,5-epoxy-3-keto-steroids of the general formula <FORM:0838771/IV (b)/1> wherein R represents (H)OH, (H)OCOCH3 (H)COCH3, (H)COCH2OH, (H)COCH2OCOCH3, or (OH)COCH2OCOCH3, and R1 represents (H)H, (H)OH or O, and the preparation thereof by reacting the corresponding 3-keto- D 4-steroid in solution in an organic solvent, preferably a water-miscible organic solvent such as methanol or ethanol, with hydrogen peroxide under alkaline conditions.  In the examples, 4,5-epoxy derivatives of pregnaneand allopregnane-3,20-dione, etiocholane- and androstane - 17b  - ol - 3 - one, pregnane - and allopregnane - 21 - ol - 3,20 - dione and the acetates thereof, pregnane and allopregnane-3,11,20 - trione, pregnane - 11a  - ol - 3,20 - dione and pregnane- and allopregnane - 11b -ol-3,20-dione.  Specifications 838,773 are referred to.
Patent GB-498060-A (GB)
Title: Improvements in or relating to lubricating systems
IPC: F16N27/00
Filed: 1937-08-13
Abstract: 498,060. Regulating fluid flow. CHALMERS, R. A., and TECALEMIT, Ltd. Aug. 13, 1937, No. 22247. [Class 135] [Also in Group XXXIV] A lubricant flow-control fitting comprises one or more helically coiled resilient members in combination with a conduit, the coils of the resilient member, or of the combination of resilient members, being in contact so as to form one or more helical ducts between adjacent coils and a surface or surfaces provided within the conduit. As shown, a closed coiled spring 8, Fig. 2, having a plug 12 and a solder plug 9 is closely fitted in a bore 5 thus providing a helical duct 10 for lubricant. A filter plug 11, and a valve 13, such as is described in Specification 262,715, [Class 135], may be included. The plug 12 may be omitted. In a modification, two springs 8a, 9b, Fig. 4, shaped as shown, are fitted in a conduit 5 having an enlarged part 24. A central plug 26 having a slot 27, and a spring pressed packing 30 are provided. Lubricant passes through the helical duct 10a to an outlet 21, and through a helical duct 10b to the outlet 22. In a modification the lower part of the plug 26, and the enlargement 24 of the conduit 5 are omitted. Means are provided for compressing the outer coil axially so that the dimensions of the duct 10a, which, in this construction, feeds the outlet 22 can be varied.