baber/WOPTO huggingface dataset:
Patent GB-961223-A (GB)
Title: Improvements in photographic developing apparatus
IPC: G03D9/00
Filed: 1961-06-09
Abstract: 961,223. Photographic developing apparatus. C. W. KUO. June 9, 1961 [July 30, 1960; Oct. 11, 1960], No. 20963/61. Heading G2A. A developing apparatus has a multi-holed plate extending over a tank, a spray pipe positioned just above the plate so as to allow a paper sheet to pass between them, an arrangement for passing another paper sheet above the spray pipe, and rollers at the rear of the apparatus for pressing the papers together. In the form shown, the multiholed plate 4 extends over the tank 1, ending just short of rollers 2, 3. Above the plate is a spray pipe 5 lying against a partitioning plate 7, and over that is a guarding plate 8. An exposed negative sheet is passed between pipe 5 and plate 4, its sensitive side being sprayed with developer from the pipe 5, This may have perforations along its lower side, in which case the paper is sprayed directly, or along its upper side, in which case the spray emerges in an upward direction and is deflected downwards on to the paper. In either case the paper is wetted on one side only. The positive sheet is inserted between plates 7, 8, and the two sheets are pressed together by passing between rollers 2, 3, when the image is printed on to the positive. The arrangement may be slightly modified (Fig. 3, not shown) by having perforations along both top and bottom of the spray pipe. 5, so that the sensitive side of the upper (positive) sheet is also wetted.
Patent GB-1206504-A (GB)
Title: A flushing device for a reversible hydrostatic drive
IPC: F15B21/044
Filed: 1968-05-02
Abstract: 1,206,504. Flushing hydrostatic drive circuits. VON ROLL A.G. 2 May, 1968 [2 May, 1967], No. 20977/68. Heading F2C. A reversible hydrostatic drive flushing device comprises a flushing pump 3, Fig. 1, connected to a pressure limiting valve 8 having a piston member 18 and, through feed valves 4<SP>1</SP>, 4<SP>11</SP> to the two sides of the drive circuit, the pressure in the high pressure side of which controls a flushing valve 12 so that when the latter is in a neutral position a piston control edge 22<SP>1</SP> controls the flushing pump delivery pressure and when the flushing valve 12 is in an end position, another piston control edge 22<SP>11</SP> controls the flushing pressure applied to the operative low pressure side of the drive circuit. The flushing valve feeds oil to the operative low pressure side of the drive circuit to remove air and/or foreign bodies and to replenish the circulating oil. Operation.-A prime mover (not shown) drives an adjustable primary pump 1 and a non-adjustable secondary unit 2 drives a machine (not shown). The constant delivery pump 3, driven separately or by the prime mover, supplies both sides of the drive circuit through the non-return feed valves 4<SP>1</SP>, 4<SP>11</SP>. In the neutral position (Fig. 2, not shown), the pressure in conduits 5<SP>1</SP> and 5<SP>11</SP> are identical. Increase of pressure, e.g. in the upper circuit, causes valve member 12 to move to its lower end position as shown to connect the low pressure side via conduit 5<SP>1</SP> to the connection 7. The entry of the projection at the lower end of valve member 12 into a chamber provides some damping which is supplemented by high pressure in chamber 14<SP>1</SP> transmitted from the high pressure side through bore 12<SP>11</SP>. As the pressure in conduit 511 drops, spring 15 returns the valve member 12 to the neutral position. The flushing pump delivery is transmitted through piston 18, a constriction 19 and a spring-loaded valve 20 to the pump reservoir 10. The high pressure medium is always in direction HD. In a modification valve 20 may be omitted.
Patent GB-651928-A (GB)
Title: Improvements in and relating to plasterer's trowels
IPC: E04F21/06
Filed: 1948-08-09
Abstract: 651,928. Plasterers' trowels. SENIOR, A. E., and MORTON, E. Aug. 9, 1948, No. 21008. [Class 61(ii)] A handle 4 is secured to the blade 2 of a plasterer's trowel by countersunk screws 5 which pass through plain holes 6 in the blade and are screwed into threaded holes in the tang 3. Screws having domed heads 8 slotted at 9 are used, the dome being ground off flush with the undersurface of the blade after assembly of the parts.
Patent GB-570060-A (GB)
Title: Improvements relating to the manufacture of machine knitting needles
IPC: D04B35/02
Filed: 1943-12-15
Abstract: 570,060. Making knitting-machine needles. EVERETT, S. J. Dec. 15, 1943, No. 21036. [Class 83 (ii)] [Also in Group VIII] Knitting-machine needles are made from wire 6, Fig. 5, by swaging down the end to lead by a taper section 3a to a pin 4a of the diameter required for forming the hook. The swaged blank is placed in a, groove 7, in a die, which may be split in the plane of the groove and be heated, if required, and the end is offset by a die 9, Fig. 7. A further blade-like die 10, Fig. 10, then acts on the shank of the hook to press it to channel section and further dies close in the sides of the channel to produce a tubular section. The meeting edges of the channel may be copper plated to enable the seam to be joined by brazing, alternatively soldering or welding may be employed, and a mandrel such as a brass wire may be used. For the larger sizes of needle the mandrel may be a tube that is left permanently in the needle shank. In a modification, the shank is flattened before being channelled, and the flattening dies may be such that a thicker portion is left along the centre to enable the base of the channel to be formed thicker than the sides as may easily be done when using the dies of Fig. 10. Heat treatment and polishing complete the needles. Specification 530,428 is referred to.
Patent GB-651359-A (GB)
Title: Improvements in or relating to thermionic valve amplifiers
IPC: H03G3/22
Filed: 1948-08-11
Abstract: 651,359. Valve amplifying circuits. GENERAL ELECTRIC CO., Ltd., and COLLINS, L. Aug. 11, 1948, No. 21193. [Class 40 (vi)] In an amplifier including a valve having in its cathode circuit a resistive load impedance which comprises a resistive device whose value varies inversely with the current flowing through the device, variations in the current flowing through the device due to variations in the power supply potential result in inverse variations of the amplification factor of the stage comprising the valve. As shown in a cathode-follower stage the resistive device 3 shunted by a resistor 8 of constant value, is connected in series with a resistor 2 of constant value in the cathode circuit of the triode valve, the output circuit being connected across the device 3. Values for the circuit components are given.
Patent GB-449648-A (GB)
Title: Improvements in or relating to centrifugal driers
IPC: D06F49/06
Filed: 1935-07-25
Abstract: 449,648. Centrifugal machines. IMPE, F. VAN, 210, Chaussee de Gilly, Ransart, Belgium. July 25, 1935, Nos. 21221 and 21222. Convention dates, Nov. 30, 1934 and March 1, 1935. [Class 23] An extractor, or similar machine, has a basket 1 at the top of a shaft 2 in spherically cased bearings 14, 7 and the upper bearing 14 is housed in a disc 15 connected to the casing 16 by radial springs 17. The base of the basket rests upon a collar disc 3 on the shaft 2, and is secured by a washer and nut 4 enclosed by a bell 6 fixed to the disc 3. The spherically cased bearing 7 at the lower end of the shaft is supported in a sleeve 9 the upper end of which is flared and restricts the movement of the shaft. Plates 19, 33 protect the bearings 14, 7. The machine is driven by a motor 24 connected by a belt 25 to a pulley 26 which is arranged on the shaft 2 close to the bearing 7. A pedal-operated brake 28 may be applied to the face of the pulley 26. The machine stands upon feet 42 each of which bears against a spring 44 in sleeve 41. The upper portion of each foot may be covered with rubber 46 to deaden noise.
Patent GB-717045-A (GB)
Title: Improvements in or relating to amino acid anhydrides
IPC: C07D263/44
Filed: 1951-09-10
Abstract: N-Carboxyanhydrides of amino-acids of formul  H2N-R-COOH where R is a divalent aliphatic hydrocarbon radicle in which both valency bonds are attached to the same carbon atom R1CH(NH2)COOH where R1 is an aliphatic saturated thiahydrocarbon or benzyl radicle, HOOCCH(NH2)-(CnH2n)-NH2 where n is 1-10 or HOOCCH(NH2)-(CnH2n)-R2-(OH)m where R2 is an aryl nucleus which may contain additional substitutents, n is 1-10 and m is 1-3 are made by treating the amino acid or a derivative thereof in which any hydroxyl group or amino group other than in the a -position has first been protected, with sulphur dioxide and thereafter treating the resultant product with phosgene and, when such derivative has been p  employed, further treating the derivative to convert it to the free anhydride. Amino acids specified are glycine, alanine, valine, norvaline, leucine, norleucine, isoleucine, phenylalanine, methionine, lycine and ornithine in which the amino group not in the a -position is acylated and esterified acids of formula <FORM:0717045/IV (b)/1> in which X is H, I or OH and n is 1 or 2, e.g. tyrosine, 3,5-diiodotyrosine, thyroxine and 3,4-dihydroxyphenylalanine the hydroxy group being esterified.  Reaction is effected under anhydrous conditions and organic solvents such as glacial acetic acid, methyl ethyl ketone, acetone, toluene and benzene are specified.  Desirably a solvent is used which is a solvent for the product but not for the starting or intermediate materials, the product being recovered by the addition of a non-solvent such as pet. ether, hexane and tetrachlorethane.  Treatment with SO2 is preferred at 10-25 DEG  C., especially 15-20 DEG  C., and with phosgene at 15-60 DEG  C., especially 25-45 DEG  C.  The acylations or esterifications required to protect the starting compounds are effected by treating the appropriate amine with a soluble copper salt such as the carbonate to yield a complex in which the amino group not in the a -position is protected, reacting with an acid chloride or alkyl or aralkyl chloroformate and decomposing the esterified complex by precipitating the copper in an insoluble form, e.g. at the sulphide.  Acetyl chloride and methyl and benzyl chloroformate are specified as protecting agents.  In examples N-carboanhydrides are prepared in methyl ethyl ketone solution of (1) and (2) glycine, (3) valine, (4) l-leucine, (5) alanine, (6) tyrosine after conversion to its o-carbobenzoxy derivative, (7) methionine and (8) l-lysine after conversion to its e -N-carbobenzoxy derivative.
Patent GB-630312-A (GB)
Title: Improvements in or relating to foot measuring appliances
IPC: A43D1/02
Filed: 1946-07-16
Abstract: 630,312. Foot-measuring appliances. HOWLETT, A. July 16, 1946, No. 21281. [Class 17 (iii)] [Also in Group XVII] A device for measuring the overall length of a foot and its girth at various localities comprises a base 1 with a heel abutment 3 at one end and an abutment 4 slidable longitudinally of the base in slots 2 or in a central slot between the slots 2 to contact the big toe and to give, on scales 6, the length of a foot placed thereon. A flexible tape 7 is threaded through the slots 2 and movable along the base 1 to permit girth measurements to be taken. The measuring device may be incorporated in a foot-fitting stand, or form part, e.g. a lid, bottom or side panel, of a boot box, the abutments 3, 4 being hinged to fold out of the way.
Patent GB-884637-A (GB)
Title: Cyclopropane derivatives
Filed: 1960-06-17
Abstract: The invention comprises compounds of the formula <FORM:0884637/IV (b)/1> in which R1 is an alkyl group containing 1 to 4 carbon atoms or an aralkyl group and R2 is an alkyl group containing 1 to 3 carbon atoms and a process for their preparation which comprises subjecting to treatment with a strong base a compound of the formula Y-CH2-CH2-CHR1COR2 where Y is a halogen atom.  In the example a -acetyl-g -butyrolactone is converted to its sodio derivative and reacted with methyl iodide to give the a -methyl compound which is treated with hydrochloric acid to give 3-methyl-1-chloro-4-pentanone and this compound cyclised by heating with caustic soda to give a -acetyl-a -methyl - cyclopropane.  1 - methyl - cyclopropane carboxylic acid may be prepared by oxidising a  - acetyl - a  - methyl - cyclopropane with hypobromono acid.  Specifications 884,638, 884,639 and 884,640 are referred to.
Patent GB-1554048-A (GB)
Title: Prostacyclin derivatives
IPC: C07F3/10
Filed: 1977-05-20
Abstract: Analogues of 5,6-dihydroprostacyclin of the formula <IMAGE> in which the substituents are defined in claim 1, are prepared. These compounds are obtained by halogenating and cyclising a compound of the formula <IMAGE> and subsequently reductively dehalogenating the reaction product, with the formation of the desired ether, or by converting the said compound LXII into a corresponding mercury compound and then subjecting the reaction product to the removal of mercury by reduction. The compounds which are obtained may be used for the same pharmacological purposes as the known prostaglandins.
Patent GB-244050-A (GB)
Title: Improvements in framework joints for bedsteads
IPC: F16B12/60
Filed: 1925-08-26
Abstract: 244,050. Szalay, A., and Potichen, M. Aug. 26, 1925. Furniture joints. - A bedstead joint comprises in combination a flat plate 3, adapted to be secured to the face of a bedpost 1 and having one element 4 of a non-tapered mortice and tenon joint, and a side-rail part 10. adapted to be secured to one side and the top and bottom edges of the side-rail 7, at the extremity thereof, and provided with the cooperating element 11 of the joint, a stop 6 being provided on one of the parts 3, 10 to keep them in correct relative position when connected together.
Patent GB-701829-A (GB)
Title: Improved devices for producing phase contrasts when examining microscopic objects
IPC: G02B21/14
Filed: 1951-09-12
Abstract: 701,829. Phase contrast microscopy. LEITZ GES., E. Sept. 12, 1951 [Sept. 15, 1950]. No. 21464/51. Class 97(1) The phase contrast microscope claimed in Specification 665,944 is modified by the arrangement of an optical dispersing member between the condenser for focusing the annular base ' of illumination, and the object, so as to form an annular spectrum in the phase plate, the thickness of the latter varying radially. As shown the illuminating beam 1 after passing a filter 2 permeable to two, three or more ranges of the spectrum, is concentrated to a narrow annular base 4 by a condenser 3 and is then dispersed by a transparent cone 8 to be focused on the phase plate 7 by the objective 6 to form thereon a series of concentric coloured rings. The light diffracted by the object 5 passes through the central aperture of the phase plate 7. The thickness of the phase plate may vary continuously radially or in steps which themselves may be of varying thicknesses, and the thicknesses may be such that the. phase alteration by the plate amounts to the same fraotum of the respective wavelengths of the spectral groups. The cone 8 may be replaced by a chromatically uncorrected lens. Specification 648,801 also is referred to.
Patent GB-361342-A (GB)
Title: An improved hydraulic power transmitter
IPC: F16H61/54
Filed: 1930-07-16
Abstract: 361,342. Hydraulic transmission of power. FRASER, J., 424, Parliamentary Road, and CAMPBELL, D., 36, Regent Park Square, both in Glasgow. July 16, 1930, No. 21472. [Class 69 (ii).] The impeller of a hydraulic power transmitter has vanes A, Figs. 1 and 4, so formed and disposed that the direction of discharge forms an acute angle with the tangent at the point of exit, the liquid being directed to the vanes by radial division plates B. The impeller may be moved axially to bring its vanes into register with the ahead vanes D of the driven turbine, or with fixed guide blades G and reverse vanes E. The liquid in the circuit is cooled and its quantity regulated by means of Pitot tubes connected with a radiator 4, Fig. 5, a tank 1 being connected as shown. Specification 254,071, [Class 69 (ii), Hydraulic presses &c.], is referred to.
Patent GB-128130-A (GB)
Title: A New or Improved Device for Cleaning Forks, Spoons and the like.
Inventor: FILLEUL STANLEY
IPC: A47L21/04
Filed: 1918-12-23
Abstract: 128,130. Filleul, S. Dec. 23, 1918. Forks and spoons, cleaning.-A fork &c. cleaner comprises spaced layers of fabric constituted by a strip 7 threaded through slots in standards 5 formed by the upturned ends of a metal trough 3 secured to a wooden base. One end of the strip is gripped by a removable metal plate 8.
Patent GB-193070-A (GB)
Title: Improvements in and relating to compression refrigerating machines
IPC: F25B1/00
Filed: 1921-08-15
Abstract: 193,070. Buch, P. H., and Groff, H. M.Aug. 15, 1921. Fluid-actuated valves.-The expansion valve 6, Fig. 5, of a compression refrigerating machine wherein the refrigerant evaporates directly into a liquid to be used as a cooling-medium is controlled by bellows members 8, 12 in communication respectively with the low and high pressure parts of the system, the bellows 8 opening directly into the vapour space of the evaporator while the bellows 12 communicates through a pipe 14 with the delivery pipe a ot the condenser. Normally, the contraction of the bellows 8 due to the suction of the compressor overcomes a spring 11 tending to close the valve. In the event of obstruction of the valve the bellows 12 expands against the action of springs 15, Fig. 6, and through a cross-rod 13 assists the action of the bellows 8.
Patent GB-1224217-A (GB)
Title: Improvements in or relating to amplifiers
Inventor: LENDER RUDOLF
IPC: H03F1/30
Filed: 1968-05-07
Abstract: 1,224,217. Transistor amplifying circuits. TELEFUNKEN PATENTVERWERTUNGS G.m.b.H. 7 May, 1968, No. 21634/68. Heading H3T. In a push-pull amplifier-as shown, comprising transistors 1, 2 operating into load L- voltage half-waves set up across a resistance 4 inserted in an amplifier circuit in which idling current flows and exceeding voltage set up thereby the idling current flowing when the amplifier is undriven are separated by a diode 7 and compared with a constant reference voltage from source 6 in a voltage comparator 5, e.g. a differential amplifier. The difference voltage produced by the comparator 5 is employed to control a bias voltage fed to the amplifier, i.e. by bias source 3 so as substantially to eliminate departures of the actual idling current from a predetermined value which flows when the amplifier is undriven. A further diode 10 may be connected across the resistor 4, and the output of diode 7 is fed to comparator 5 over a resistance-capacitance circuit 8, 9 having a time constant greater than the reciprocal of the lowest signal frequency to be amplified.
Patent GB-1452372-A (GB)
Title: Device for post-stressing reinforced concrete structures
IPC: E04G21/12
Filed: 1974-01-15
Abstract: 1452372 Tensioning cables 279030 ONTARIO Ltd 15 Jan 1974 21752/76 Divided out of 1452371 Heading F2G The subject matter of this Specification is the same as that of the parent Specification 1452371 but the claims relate to the anchor head assembly.
Patent GB-135994-A (GB)
Title: Improved Azimuth Mirror Fitting for Mariners' and like Compasses.
Inventor: EVERITT PHILIP FRANCIS
IPC: G01C17/00
Filed: 1918-12-30
Abstract: 135,994. Everitt, P. F., and Hughes, H. A. Dec. 30, 1918. Mariners' compasses.-An azimuth fitting for a mariner's compass comprises an adjustable prism G for reflecting the distant object, and a halflens J adjacent to it which, in conjunction with a single or double reflection prism K, produces an image of the card above, below, or superposed on, the image of the distant object. The arrangement may be such that the image of the card is at infinity. As shown, the prism K is a doublereflection prism, and the usual shades H, a shadow pin B, and levels C are provided.
Patent GB-321177-A (GB)
Title: Improvements in the manufacture and production of nitrogenous condensation products from acetylene and ammonia
IPC: C07D213/12
Filed: 1928-07-27
Abstract: 321,177. Johnson, J. Y., (I. G. Farbenindustrie Akt.-Ges.). July 27, 1928. Denaturing alcohol.-Pyridine bases such as picoline, butidine and collidine are produced by passing a mixture of acetylene and ammonia at raised temperature not above 350‹ C. over catalysts containing highly dispersed metallic lead, cadmium, bismuth or gold, which may be used with a highly porous carrier such as aluminium, zinc or silicon oxide. The catalysts may be made by mixing the porous carrier with a salt of one of the metals mentioned which on heating in a reducing atmosphere yields the metal or by mixing the oxide of the metal with, say, alumina or by precipitating the oxides together from, say, lead and zinc nitrates, the mixtures then being reduced, for instance by heating in hydrogen. In an example, silica gel impregnated with cadmium nitrate is reduced in hydrogen at 300‹ C., and acetylene and ammonia are passed over at 300- 350‹ C. yielding mainly picoline. The products are suitable for denaturing alcohol; or a fraction of the product such as that boiling between 100‹ and 150‹ C. may be so used; and an improved effect may be obtained by using an admixture of the product with a condensate obtained by passing a mixture of acetylene and hydrogen over iron pyrites at 350‹ C. Specification 295,276, [Class 2 (iii), Dyes &c.], is referred to.
Patent GB-672958-A (GB)
Title: Improvements in or relating to vices and similar work holders
IPC: B25B1/24
Filed: 1949-08-23
Abstract: 672,958. Vices. STAFFORD, J. L. Aug. 4, 1950 [Aug. 23, 1949], No. 21813/49. Class 61 (ii). A vice for use in connection with machine tools which supports cylindrical objects of differing dimensions at the same position in relation to a tool, comprises jaws 16, 17 movable on spaced guide rods 13 by means of a right and left handed screw shaft 21. Inserts 18 of hard metal are fixed in recesses in the jaws, the inserts being grooved transversely and longitudinally at 25 and 26 to allow cylindrical workpieces to be effectively gripped either horizontally or vertically with respect to the base. Holes 12 are' provided in the base for attachment to the bed of a machine.
Patent GB-138286-A (GB)
Title: Improvements in or relating to mixing apparatus
IPC: B01F7/16
Filed: 1919-09-05
Abstract: 138,286. Grey, R. B. Sept. 5, 1919. Batch-mixers with circulating-devices.-Relates to mixing apparatus of the vortex type in which the contents of a tank are circulated by a propeller H and baffles or breakers are provided to break up the stream. The invention consists in making the baffles A independently adjustable as to their depth of immersion in the contents of the tank.
Patent GB-1036296-A (GB)
Title: Inertia-operated switches for motor driven vehicles
Inventor: HITCHCOCK ARTHUR ADAM
IPC: H01H50/20
Filed: 1965-05-24
Abstract: 1,036,296. Inertia switches. A.C.B. CORPORATION. May 24, 1965, No. 21868/65. Heading H2B. In an inertia switch for motor vehicles the battery connection to earth is through lead 12, terminal post 11, fixed contact 15, a bell crank lever comprising moving contact arm 16 and arm 19 pivoted about pivot 18, a catch 21, feet 26 on catch 21 to housing 10. Spring 17 urges arm 16 away from contact 15, but the contacts are retained in engagement by catch 21. The contacts are broken by the energization of solenoid 31 which lifts its armature 28 to trip catch 21. In the event of a collision, steel ball 37 runs up ramp 36 and moves metal plate 38 into contact with the flaps 38a round an opening in the bottom of metal cylinder 33 connected to the battery through lead 32 thus completing the circuit between the battery and the solenoid via cylinder 33, plate 38, spring 39, post 41, washer 44 and lead 45. In the event of the vehicle overturning, steel ball 46 completes the circuit from the battery to the solenoid via cylinder 33, ball 46, disc 47, post 41, washer 44 and lead 45. The catch can be reset by bar 51 the end of which 52 engages arm 19 if the bar 51 is pulled. Bar 51 can also be used to manually energize the solenoid by pushing arm 49 carrying contact 50 against cylinder 33, arm 49 being connected by lead 48 to the solenoid.