baber/WOPTO huggingface dataset:
Patent GB-729141-A (GB)
Title: Improvements in and relating to hydraulic control valves for pressure fluid
Inventor: TOWLER JOHN MAURICE
IPC: F15B13/04
Filed: 1952-04-05
Abstract: 729,141. Fluid-pressure servomotors. ELECTRAULIC PRESSES, Ltd. March 20, 1953 [April 5, 1952], No. 8782/52. Class 135. An hydraulic control valve is given an initial movement away from a neutral position by a momentary impulse of pressure fluid thereto and its full movement is completed automatically by the application of pressure fluid entering through a port opened by the valve in its initial movement. The valve is particularly suited to the control of a servo-actuated primary control valve for hydraulic presses as described in Specification 727,976. The valve comprises a body 1 with end covers 3, 4 and a bore in which slides a valve member 2 normally maintained in a central neutral position by springs 31, 41 in end spaces 33, 43. The valve bore has an annular chamber 13 connected to a pressure liquid supply P, two annular chambers 12, 14 by which pressure liquid is directed alternately to opposite ends of the servo-actuated valve, and two annular chambers 11, 15 communicating with exhaust connections E, E. The valve member 2 has two reduced parts 24, 25 separating parts 21, 22, 23 which fit the valve bore. In the neutral position, the chamber 13 is blocked by the valve part 22 and the other four chambers 11, 12, 14, 15 are open to the exhaust connections E, E. The end spaces 33, 43 communicate with reduced valve parts 24, 25 through axial passages 26, 27 and transverse passages 28, 29. The passages 26, 27 are fitted with chokes 26a, 27a so that when pressure fluid is admitted momentarily to one or other of the end spaces 33, 43, sufficient back pressure is built up therein to move the valve away from its central position. Such initial movement first cuts off one or other of the chambers 12 or 14 from the exhaust chambers 11, 15 and subsequently connects the other chamber 12 or 14 to the pressure chamber 13. At the same time, the appropriate end space 33 or 43 is connected to the pressure source through the reduced valve port 24 or 25 and the passages 26, 28 or 27, 29 so that the valve completes its full movement and stays in this position until a pressure impulse is applied to the end space at the opposite end of the valve. The valve is automatically returned to the neutral position on failure or interruption of the liquid pressure. It may also be returned to the neutral position by applying pressure to or venting both end spaces simultaneously. When the valve returns to the neutral position fluid displaced from the end spaces 33, 43 returns to the supply connection P through the non-return valves 16, 17. The momentary pressure impulses may be supplied through connections in the end covers 3, 4 by the overflow of a relief valve or by servo fluid under the control of a push-button or tappet operated admission valve. The passages 26, 27, 28, 29 may be replaced by corresponding passages in the valve body.
Patent GB-551301-A (GB)
Title: Improvements in or relating to power stamps, hammers, and like machines
IPC: B21J7/24
Filed: 1941-07-12
Abstract: 551,301. Power hammer. MASSBY, Ltd., B. & S., and MASSEY, H. F. July 12, 1941, No. 8843. [Class 83 (iv)] Double drive hammers having a combined anvil block and tup assembly suspended or balanced by a pneumatic spring as described in Specification 497,826, have the air spring acting through an oil seal to prevent leakage, and means for varying the pressure of the air spring. The anvil block 11, Fig. 1, and the guides for the tups 12 are suspended from the fixed frame by pistons 13 in oil cylinders 14 connected to the bottom of the top compartment 18 of three compartments in a tubular column 15 connected at 17 to a second column 16 both columns being closed at the bottom. The column 16 contains the airspring that presses on the oil in the compartment 18. The spring is loaded to the requisite pressure by a pump 21 that draws oil from the bottom compartment 20 and delivers it to the compartment 19 forcing air through a valve 23, pipe 24 and non-return valve 25. When the compartment 19 is full of oil the valve 23 is closed, the compartment is connected to atmosphere and the oil returns to 20 through a transfer valve 26. This cycle is repeated until the air spring has the required pressure. In operation, a motor driven pump 27 delivers oil past a valve 30 to a cylinder 29 thus separating the tup and anvil, till a trip mechanism shifts the valve allowing the oil to return and the tup to fall. The pistons 13 being thus temporarily relieved of the weight of the tup raise the anvil to meet the falling tup and on impact the momentum approximately cancels out. The valve 30 may be such as to cause a succession of blows until the valve is locked in a neutral position. In a modification adapted for the automatic charging of the air spring a pump 21a, Fig. 6, delivers oil from the sump 36 at 3211 below a piston 31 working in the part of the column 15a occupied by the middle and lower compartments in the above form. Oil pressure at 321 raises the valve 33 closing passages 34, 35. The oil is delivered below the piston causing it to rise and free air from above it through valves 23a ... 25a as before. At the top of its stroke the piston uncovers a passage 38 admitting oil above the valve 33 and forcing the latter to its lower position in which oil returns from below the piston via passages 34 and 35 to the sump. At the end of the down stroke of the piston the passages 34, 38 are closed and the valve 33 is raised the cycle repeating till the air spring is charged. In a further modification a second piston is employed in an auxiliary column one piston comprising air whilst the other returns the valve 33 being made double acting. Further to increase the rapidity of action the pistons may be supplied with compressed air instead of with air at atmospheric pressure. Instead of the columns horizontal or other air vessels may be employed.
Patent GB-354393-A (GB)
Title: Improvements in and relating to tracer mechanism for copying and reproducing machines
IPC: B23K7/00
Filed: 1930-05-10
Abstract: 354,393. Uniting and dividing by fusion; copying and reproducing mechanism. KREBS, C., 70, Lansdowne Street, Boston, U.S.A. May 10, 1930, No. 8850/31. Divided on 354,389. [Classes 83 (iii) and 83 (iv).] In copying and reproducing mechanism of the kind in which a tracer wheel follows a pattern or templet and controls linkage which carries a tool such as a metal-cutting torch, the tracer wheel is rotated through gearing from an electric motor and the motor, gearing and wheel are mounted to rotate and reciprocate as a unit about a vertical axis with respect to the linkage without transmitting vibrations thereto. The tracer may be used with linkage as described in Specification 354,389. The tracer head comprises an electric motor 80 which, together with its reduction gearing 81, 82, 86 is carried by a revoluble platform 100 on the arm 20 of the linkage. The gearing rotates a vertical shaft 87 which is arranged immediately over the point of contact of the tracer wheel 90 with a pattern or drawing &c. 140, the wheel being driven from the shaft through a bevel gear 94 and spur gears 97. The roller is narrow as shown so as to follow a line drawing easily and rollers 150 may be provided to act on opposite sides of a pattern strip 140 at a point slightly in advance of the wheel 90 to guide the tracer along the strip. The rollers are carried by levers 151 pivoted on the axis 91 of the tracer wheel and provided with a handle 152 which co-operates with a perforated segment 154 to define the position of the rollers 150 or to raise them above the wheel 90 to permit hand control by means of the handle 152. The bracket 102 which carries the rollers and gears is attached to a sleeve 101 rotatable within a sleeve 104 secured to the arm 20 and carries at the upper end the revoluble platform 100. The tracer wheel is thus capable of rotation about a vertical axis and of sliding vertically relatively to the arm 20, the supply of current to the motor being maintained by two insulated slip-rings 110, 111 engaging a pair of contacts 113 pressed downwards by springs 130 and mounted on an arm 118 pivoted at 119 to a pillar 120. A spring 126 normally depresses the arm 118, a stop 125 limiting its downward movement, and a hand-lever 132, engaging the platform 100 at 134, provides for raising the tracer wheel and motor to allow the tracer to be moved to any position on the pattern. A locking lever 137 may be engaged in a bifurcation 136 in the lever 132 to maintain the tracer in a raised position. The vertically slidable mounting of the tracer relieves the pantograph linkage from distortion due to the weight of the motor, gearing &c.
Patent GB-573294-A (GB)
Title: Improvements in cams for operating valves of internal combustion engines
IPC: F16H53/02
Filed: 1944-05-10
Abstract: 573,294. Cams. AUSTIN MOTOR CO., Ltd., and CHARLES, H. N. May 10, 1944, No. 8856. [Class 80 (iii)] [Also in Group XXVII] A cam for operating a valve has a lift curve, denoted by the continuous line in Fig. 7, such that after taking up clearance and lost motion, it consists of the sum of a major sine wave denoted by a chain line and a minor sine wave denoted by a dotted line, the amplitude of the major sine wave being at least three times that of the minor which has a frequency higher than that of the major sine wave, a suitable value being 50 per cent higher.
Patent GB-417983-A (GB)
Title: Improvements in and relating to valve actuating mechanism for radial cylinder internal combustion engines
IPC: F01L1/42
Filed: 1934-03-21
Abstract: 417,983. Valve gear; casings. COMPAGNIA NAZIONALE AERONAUTICA, 23, Via Sistina, Rome. March 21, 1934, No. 8870. Convention date, March 21, 1933. [Classes 7 (ii) and 7 (vi).] In radial-cylinder engines, the radial valve - actuating shafts 1 are arranged to drive the cam shafts of two adjacent cylinders instead of the two cam shafts of the same cylinder. In the form shown, the shaft 1 is geared by bevel wheels 7, 8 to a gear wheel 9 meshing with pinions 2 on the cam shafts 5. To allow for expansion of the cylinders, the casing 3 enclosing the gears 7, 8, 9 is not rigidly connected with the cylinder heads, but is connected to two casings enclosing the cam shafts 5, by means allowing relative movement. The casings 4 are provided with extensions 6 secured in holes at the rear of the casing 3, by nuts 11 which are not very tightly screwed up. A universal or like joint 13 is provided in the shaft 1.
Patent GB-785058-A (GB)
Title: Improvements in or relating to the impregnation of sheet materials with synthetic resin latices
IPC: C08J3/03
Filed: 1955-03-25
Abstract: 785,058. Impregnated stiffening materials. CELASTIC CORPORATION. March 25, 1955 [July 22, 1954], No. 8872/55. Class 140. [Also in Group VII] Sheet material capable of being stiffened is made by impregnating a fibrous sheet material with (a) an aqueous vinyl resin latex containing an anionic surface-active wetting agent; and (b) an aqueous solution of a polyvalent metal salt, separately but in either order, and drying the impregnated sheet material. Stiffening is effected by the action of a solvent for the resin. When the metal salt solution is applied first, the impregnated sheet may be wholly or partly dried before treatment with the resin latex. When the latex is applied first, it may be used in a partly coagulated state brought about by the addition of enough coagulant salt to give it a creamy consistency, the fibrous material treated with this creamed latex being stripped to remove excess, impregnated with a dilute coagulant solution, and dried. The resin contained in the latex may be polystyrene, polymethyl styrene, polyvinyl or vinylidene halides, polyacrylonitrile, polyacrylates or polyalkylacrylates. A plasticizer may be added, e.g. an organic ester, or a copolymer of styrene and butadiene in latex form. Fillers such as bentonite clay or infusorial earth, and thickeners such as methyl cellulose or carboxymethyl cellulose may also be added. The anionic surface-active agent may be an alkali metal organic sulphate, sulphonate, phosphate or phosphonate, or an ammonium soap. The polyvalent metal salt may be a chloride, nitrate, sulphate or acetate of aluminium, magnesium, calcium, strontium, iron, cobalt, tin, copper, chromium or cadmium, or one of the alums. The fibrous sheet may be cotton flannel, felt, paper or a matted fibrous sheet. The material may be used to produce a box toe or counter in a shoe, a laminate with other materials, artificial limbs or shaped moulds, to repair gutters, fenders and motor car bodies, or to cover decks and hulls of small boats. Specification 766,866 is referred to.
Patent GB-215527-A (GB)
Title: An improved device for securing the stales of brushes and the like within the sockets of the heads
IPC: B25G3/12
Filed: 1923-10-05
Abstract: 215,527. Haslam, W. H. Oct. 5, 1923. Barbed, toothed, and like holding-devices for socket fixings. - A shee,tmetal blank of the form shown in Fig. 1 has its main body portion a bent transversely to fit the curve of the socket b in the brush &c. head c, Fig. 2. The end e is bent at right angles to form a tooth e<1> which may be driven into the handle after the handle has been forced into the socket b. The projection or foot part h is bent at right angles, and the whole is inserted in the socket. When the handle is forced in the stamped out barb g is forced into the wall of the socket from the dotted position as shown in Fig. 2, and the foot h is driven down into the base of the socket as shown in full lines. The tooth e@ is finally driven into the handle.
Patent GB-814116-A (GB)
Title: Improvements in the continuous rolling of tubes
IPC: B21C1/26
Filed: 1957-03-19
Abstract: 814,116. Rolling tubes. EISENWERKGESELLSCHAFT MAXIMILIANSHUTTE A.G. March 19, 1957 [March 23, 1956], No. 8936/57. Class 83 (4). In a method of rolling tubes c, Fig. 3, over a mandrel a on which they have been pierced the tubes are rolled in three housings d of driven rolls which are spaced apart so that the tube is engaged by only one set of rolls at a time. The housings d may have a common drive and are followed by housings e of non-driven rolls through which the work is pushed to run out rollers g by means of feed rolls f which are mechanically or hydraulically pressed into engagement with the rod a. The feed rolls f are arranged between and beyond the housings d and may be automatically engaged as the tube passes.
Patent GB-913967-A (GB)
Title: Improved wheel rim for tubeless tyres
IPC: B60B25/22
Filed: 1961-03-10
Abstract: 913,967. Wheel rims. FICHTEL & SACHS A.G. March 10, 1961 [April 5, 1960], No. 8936/61. Class 144 (2). A light-weight cycle wheel rim for use with tubeless tyres comprises a rim base 1 with side flanges 2 which are extended radially inwardly of the base 1 and axially inturned at their ends 5 to support a metal strip 3 which is perforated and recessed at 7, 6 to house spoke nipples 8, the flange ends 5 being cut away at a zone 9 of their circumference to permit the strip 3 to be threaded into position. The strip 3 may be of such length that its ends abut on assembly with the base 1, or its ends may be spaced by the length of the zone 9 and the gap closed by a separate member. An inflation valve aperture 10 in the rim base is aligned with the zone 9 and a corresponding aperture is provided in the strip 3 or the separate member.
Patent GB-287928-A (GB)
Title: Improvements in wall construction
IPC: E04B2/42
Filed: 1928-03-24
Abstract: 287,928. Kleinfeldt, E. H. March 30, 1927, [Convention date]. Building blocks special shapes of.-Walls with air-circulating or insulating spaces 25 are built of interlocking blocks which consist of two portions 12, 13 spaced apart by integral webs 14 and provided with grooves 18 and bevelled tongues 19 on the upper and lower faces, concavities 22 on the end faces, and a central groove 15 and tongue 16 with bevelled edges 17. The mortar joints are concealed in the spaces 23 and grooves 18, and the tongues 19 fit into but are shallower than the grooves 18.
Patent GB-391963-A (GB)
Title: Improvements in or relating to the production of photographic pictures
IPC: G03C5/18
Filed: 1932-03-29
Abstract: 391,963. Photographic diazotype processes. KALLE & CO. AKT.-GES., 23, Rheinstrasse, Biebrich-on-Rhine, Germany. March 29, 1932, No. 9070. Convention date, March 28, 1931. [Class 98 (ii).] A light-sensitive layer for copying photographic pictures comprises one or more diazo compounds of aromatic diamines, and one or more aromatic amino or hydroxy compounds which yield dyestuffs when treated with oxidizing agents. In a modification, any diazo component which is decomposed by light is used as a source of the aromatic amino or hydroxy compound. In examples : (1) a solution containing phenol and the cadmium chloride double salt of p-phenylenediamine, one amino group of which is diazotized, is applied to paper and exposed under a negative ; a blue-black positive is obtained by oxidizing with acidified potassium permanganate ; (2) aniline hydrochloride is used in place of the phenol; (3) a bluish-red positive is obtained by using diazotized 1-amino-7- hydroxynaphthalene in place of phenol ; (4) a solution containing p-phenylenediamine, one amino group of which is diazotized, and the cadmium chloride double salt of 4-diethylamino 2-hydroxy-1-diazobenze is applied to paper and after exposure is oxidized with aqueous copper-oxide-ammonia ; naphthalenetrisulphonic acid may be added to the sensitizing solution ; (5) in the process of example 4, iron chloride solution or hydrogen peroxide is used for the oxidation ; (6) the calcium chloride double salt of 4-diethylamino-2-hydroxydiazobenzene and p-diazodiphenylaminesulphate or its derivatives are used as the sensitizing agent ; (7) the cadmium chloride double salt of diazodimethylaniline and the cadmium chloride double salt of 4-diethylamino-2-hydroxydiazobenzene are used as the sensitizing agent ; (8) the zinc chloride double salt of 4-diethylamino-2-hydroxydiazobenzene and the cadmium chloride double salt of 4 : 4<1>-tetrazodiphenylamine or the cadmium chloride double salt of 4 - dimethylamino - 3 - methyldiazobenzene are used as the sensitizing agent ; (9) the sodium salt of 2-diazo-1-hydroxynaphthalene-4-sulphonic acid and the cadmium chloride double salt of p-phenylenediamine, one amino group of which is diazotized are used as the sensitizing agent. The alkyl, oxyalkyl, alkyloxy, and halogen derivatives of aromatic hydroxy and amino compounds are referred to, and glass plates and films of cellulose or cellulose derivatives may be used as supports. The sensitizing agents may also be present in the mass of the support which may be of regenerated cellulose or cellulose esters or ethers. Metal salts,. stabilizers, dyestuffs, and other assistants which are used in diazotype processes may be present.
Patent GB-743577-A (GB)
Title: Improvements in or relating to recording reflecting instruments
Inventor: FELDHUSEN IGOR VLADIMIR
IPC: G01D15/14
Filed: 1952-04-09
Abstract: 743,577. Photo-electric indicating systems. STANDARD TELEPHONES & CABLES, Ltd. April 1, 1953 [April 9, 1952], No. 9091/52. Class 40 (3). [Also in Group XX] To record the deflections of an optical beam, the beam is passed through a scanning device 4 to a photo-electric cell 8 at a time position in a recurring cycle corresponding to the deflection, the pulses produced by the cell 8 causing an electrical tracing device 6 moving in synchronism with the scanning device to intermittently trace on a recording medium 11. A beam from a light source 1 is reflected by a movable mirror 2 through a lens 3 on to a photo-electric cell 8, and is intercepted by a rotating disc 4 having slots 7 one of which is always traversing the length of the cell 8. The pulses from the cell 8 are amplified and passed to a fixed electrode 10 and to electrodes 6 mounted on a disc driven at the same speed as the disc 4. The electrodes 6, 10 correspond in shape and position to the slots 7 and the photo-electric cell 8 so that when the beam passes through a slot 7, the resulting pulse causes a spark to pass between an electrode 6 and the electrode 10 which spark marks a sheet of recording paper, such as is described in Specification 718,115, [Group XIX], continuously moving between the electrodes 6 and 10. In a modification the scanning device is a cylinder surrounding the photo-electric cell 8 and having a spiral slot, and the tracing device is constituted by a spiral electrode on the cylinder co-operating with the fixed strip electrode. In a further modification, in order to avoid using a long narrow photo-electric cell, the beam after passing the scanning disc 4 enters a transparent plastic block 15 having an outer elliptical surface 14 metallized. The mirror 2 and cell 16 are located at the foci of the ellipse, so that a small cell can be used. The surface of the block 15 facing the mirror 2 is cylindrical so that the light beam enters the block normal to the surface and refraction is prevented.
Patent GB-476147-A (GB)
Title: Improvements in telescopes
IPC: G02B23/00
Filed: 1937-03-31
Abstract: 476,147. Telescopes. WILD, H. March 31, 1937, No. 9156. Convention date, April 1, 1936. [Class 97 (i)] A telescope system composed of refracting and reflecting parts comprises a concave mirror arranged coaxially with a collective lens system and forming a real image in the vicinity of the lens system, a second concave mirror being arranged to form an image of this image in the focal plane of the eyepiece. In Fig. 1, all the optical elements are coaxial, the objective consisting of two separated members L<1>, L<2> and each of the mirrors L<3>, L<4> consisting of a negative lens silvered on its rear surface. The mirror L<4> is mounted in a tube R secured to the objective and projecting into the telescope to act as a diaphragm. Fig. 2 shows a form in which the mirrors L3, L4 are at right-angles to each other and the axes of the objective and eyepiece are parallel but displaced from each other so that the instrument can be used as a periscope. A reflecting prism S<3> in the plane of the image formed by the mirror L<3> directs the rays to the mirror L<4> and another prism S<4> directs the rays into the eyepiece O. Two systems of this kind, but with reduced displacement between the objective and eyepiece axes, may be used as a binocular telescope.
Patent GB-368540-A (GB)
Title: Safety catch or fastener for doors, windows and such like
IPC: E05C3/04
Filed: 1931-03-26
Abstract: 368,540. Pivoted stanchion fastenings. DUTTON, J. H., Moreton House, Ridge Park, Bramhall, Cheshire. March 26, 1931, No. 9200. [Class 44.] A fastener plate c is slidingly pivoted on a doorpost plate a. A projection c<3> rides on a surface a<3> until the plate c is moved to lie against the door when the plate falls into the dotted line position and the projection c<3> enters a slot a<5>. The surface a<3> mav be inclined as shown to prevent accidental locking. The door-post plate is reversible and the fastener plate may b( made reversible by the provision of two projections c<3>. A catch may be introduced to hold the pivoted member in the locking position.
Patent GB-678614-A (GB)
Title: Improvements in finishing leather
IPC: C14C11/00
Filed: 1949-04-05
Abstract: An aqueous emulsion of a terpolymer of acrylonitrile, butadiene, and styrene is made by polymerizing a mixture of the monomers in aqueous emulsion using as emulsifier a paraffin sulphonate, obtained by the sulphochlorination of paraffin oil and subsequent alkaline saponification, as catalyst, either benzoyl peroxide and paraffin oil sulphinate, or potassium persulphate and triethanolamine, and, optionally, a modifier, e.g. xanthogen disulphide.  The emulsion, admixed with colouring matter, is used for treating leather.