baber/WOPTO huggingface dataset:
Patent GB-520582-A (GB)
Title: Lawn mower structure
IPC: A01D34/62
Filed: 1938-10-20
Abstract: 520,582. Lawn-mowers; clutches. DEHN, F. B. (Cooper Manufacturing Co.). Oct. 20, 1938, No. 30400. [Class 6 (ii)] [Also in Group XXIV]  In a lawn-mower in which the traction wheels 10, Fig. 3, are journalled on wheel plates 13 and in which the rotary cutter 48 is supported by side frames 42, the side frames are adjustably mounted on the hub 28 of the wheel plate so that the depth of cut may be adjusted, and a roller 64 is carried by extensions of the side frames so that the side frames and wheel plates will rock about axles of the wheels as the roller passes over uneven ground. The wheels 10 are each fixed on studs 12 which are supported on plates 13 and enclosed in a bearing 16. Gear casings 21 with internal gear teeth 22 are rotatably mounted on the wheels 10. An engine 36, Fig. 1, on the deck 49 drives the cutter shaft 26 through the pulley system 35, 33, 31, 32 and the hub 27. A steel pinion 37 on the shaft 26 meshes with the cast iron gear teeth 22. The wheels 10 are driven by ratchet connections consisting of internal teeth 23, Fig. 4, on the wheel 10 coacting with pawls 24 pivoted to the casings 21. Felt washers 19, 39, 40, 45 and 50 are provided to exclude dirt &c. from the various parts, of the mechanism. The support for the deck 49 consists of members 51, Fig. 2, bolted to the ends of the deck 49 and swingable relative to the members 52, which are connected to the housings 42, arcuate slots receiving clamp bolts 57. The two housings 42 are connected by cross-rods 54, 55. Extensions 13a of the plates 13 support clamp bolts 58, and clamp bolts 59 are threaded into the plates 13 to extend through arcuate slots 61 of the chain housings 42. The bed plate 62 having extensions 63 carrying the roller 64 is supported by the side frames 42 which can be rotated relatively to the plates 13 and thus adjust the height of cut which is indicated by pointers 65 on the frames 42. To retain the baseplate 62 parallel to the ground surface, the roller 64 is adjusted relative to he mower by means of the slotted link system 67, 71, 72, 68, 69, the amount of adjustment being indicated by coacting pointers 74, 75. To facilitate tightening the driving chains, the openings 76, Fig. 4, in the chain casing 42 are made slightly arcuate about the cross-rod 54, Fig. 2, as a centre. The cutting edge of the bed-plate is adjustable relative to the rotary cutter by set screws 86, 87, carried by the members 77 coacting with lugs 89 of the side frames. The members 77 are pivoted on pintle elements such as 78, Fig. 6, at the opposite sides of the bed plate 62. The element 78 has an eccentric member 80, which when rotated shifts this end of the bed plate relative to the cutter while the other end remains stationary to compensate for uneven wear &c. of the cutters. The other pintle element is threaded and thus arranged to take up play between the pintle elements and the bed plate.
Patent GB-980840-A (GB)
Title: Process for the production of non-cellular unitary structures
IPC: B29C33/00
Filed: 1963-08-01
Abstract: 980,840. Non-cellular unitary structures. ALLIED CHEMICAL CORPORATION. Aug. 1, 1963 [Oct. 31, 1962], No. 30630/63. Heading B5A. A process for the production of non-cellular unitary structures comprises reducing rigid polyurethane foam to particles and subjecting them to a pressure of at least 140 kg./sq. cm. at a temperature of from 25 to 260 C. for at least two minutes. The foam used may be a mixture of foam produced when excess isocyanate is present and foam produced when excess reactive hydrogen is present. Examples of methods illustrating the invention are given and also tables showing the physical properties of the non-cellular polyurethane foam produced by these methods.
Patent GB-1219739-A (GB)
Title: Preparation of polyamides
IPC: C08G59/00
Filed: 1968-11-29
Abstract: 1,219,739. Modified polyethers; modified polyamides; epoxy resins. KANEGAFUCHI BOSEKI K.K. 29 Nov., 1968 [5 Sept., 1968], No. 30635/70. Divided out of 1,218,236. Headings C3B and C3R. Polyamide-polyethers are prepared by copolymerizing a linear polyamide or the monomer(s) thereof with up to 20% by weight of an ether of formula where n is 3 to 90, R is alkylene, R<SP>1</SP> is H, alkyl, cycloalkyl, acyl, aryl or alkaryl or a group of formula R<SP>2</SP> is OH and R<SP>3</SP> is halogen, amino, or carboxyl or R<SP>2</SP> and R<SP>3</SP> together are -O-. The -(OR) n O- part of the ether may be poly- (ethylene oxide) or a copolymer of ethylene and propylene oxide. This may be reacted with epichlorohydrin in the presence of BF 3  etherate to produce the mono- or di-chlorohydrin ether. This may be reacted with NaOH in benzene to produce the glycidyl ether from which the aminohydrin ether may be produced by treatment with ethylene diamine. Excess reactants are distilled off at the end of the reaction and the product may be purified by dissolving it in methanol and running it down an anionexchange column carrying OH ions. The polyamide may be derived from a diamine and a dicarboxylic acid, e.g. hexamethylene diamine and adipic acid, an omega-amino acid, or a lactam thereof, e.g. epsilon caprolactam. Comonomers may be present, e.g. hexamethylene terephthalate. Water may also be present as catalyst and the reaction may be performed under an N 2  atmosphere of superatmospheric pressure. The ether may be added before, during or after polymerization. TiO 2  as delustrant and another thermoplastic polymer, e.g. polyethylene terephthalate may be added. The products are fibre forming.
Patent GB-753118-A (GB)
Title: Instrument for checking the rate of time-piece movements
IPC: G04D7/12
Filed: 1954-10-25
Abstract: 753,118. Linkwork. MARTI, F., BRAUNSCHWEIG, G., and SCHAAD, J. Oct. 25, 1954 [Feb. 26, 1954; March 9, 1954], No. 30668/54. Class 80(3) [Also in Group XVIII] In an instrument for checking the rate of timepiece movements (see Group XVIII) the synchronous motor which serves as a time standard and drives the record strip and ink ribbon mechanism is provided with starting and braking means. The shaft 4 of the synchronous motor has a rubber ringed sleeve 24, 25 which cooperates with a lever 27 connected by screws 29 to the end of a lever 28 pivoted on a stud 30. The lever 28 is connected by a torsion spring 35 to a hand operated lever 31 also pivoted on the stud 30. On a fixed stud 37 are mounted two identical cams 38, 39 interconected by a spring 42 and normally, as shown, engaging a pin 43 on the lever 28 thereby locking the levers 27, 28. When the shaft 4 is rotating the parts are in the positions shown in full lines in Fig. 4. To stop the motor the lever 31 is manually moved to the dotted line position tensioning the spring 35, a pin 33 on the lever 31 rocks the cam 38 counter-clockwise and the spring 42 pulls the cam 39 counter-clockwise until at the end of the stroke of the lever 31 the pin 43 is freed to allow the spring 35 to pulf the levers 27, 28 clockwise and the surface 27a frictionally engages the ring 25 to stop the motor. Starting is effected in a similar mannerby movement of the lever 31 counterclockwise. The lever 27 may actuate a switch in the motor circuit at the end of its movements.
Patent GB-246641-A (GB)
Title: Improvements in apparatus for automatic proving of fermented doughs
IPC: A21C13/02
Filed: 1924-12-22
Abstract: 246,641. Brookes, S. Dec. 22, 1924. Discharging and feeding devices for endless chain conveyers.- A conveyer for carrying dough trays through a proving-chamber consists of a pair of bands or chains A pivotally supporting skeleton frames C which receive the trays from a conveyer D and deliver them to an inclined roller device E which projects into the path of the frames. The feeding-conveyer D places the travs on bars or supports d, provided with stops d<1>, from which they are lifted by the ascending frames. Pins may be provided in the frames C to register with holes in the trays. The device E consists of rollers e, the last few of which may be mounted in a pivoted section which is interconnected with the conveyer A whereby the section is tipped up when a tray is deposited on it, the tray being thus given an impetus down the roller shoot. After a tray is discharged, the pivoted section returns to receive the next tray.
Patent GB-1375539-A (GB)
IPC: E02F3/76
Filed: 1973-06-28
Abstract: 1375539 Tractor hitches DEERE & CO 28 June 1973 [29 June 1972] 30858/73 Heading A1P [Also in Division E1] A grader blade assembly, comprising an L- shaped frame 50, 52 and a blade 16, is attached to the three point linkage 28, 30, 32 of a tractor via a mounting frame 10 which attaches to the linkage and which carries frame portion 50 about a vertical axis 54. A ram 58 mountable on either side of the frame moves the frame about axis 54, but the frame can be moved manually and secured by a pin through aperture 70 in the frame and one of apertures 48 in the mounting frame. A blade carrier 72 can move about a longitudinal axis 84 with respect to the frame portion 52 and the blade 16 can be moved about an upright axis on the carrier 72.
Patent GB-632107-A (GB)
Title: Improvements in hydraulic actuating devices for presses and other hydraulic machines
IPC: B30B15/24
Filed: 1947-11-21
Abstract: 632,107. Hydraulic presses. MACREZ, A. R. Nov. 21, 1947, No. 30938. Convention date, Nov. 22, 1946. [Class 69 (ii)] In hydraulic presses and other hydraulic machines comprising a platen 6 acted upon directly by two or more cylinders 5<SP>1</SP>, 5<SP>2</SP>, which together form a balanced system with respect to the axis of the platen, each cylinder is connected to one or a number of secondary cylinders 41, 4<SP>2</SP> forming a balanced system, the pistons 3<SP>1</SP>, 3<SP>2</SP> of which are connected to a primary piston 2p (or pistons forming a balanced system per se), the cylinder 2 of which is supplied by a pressure distributer 1. A reservoir 8 to replenish leaks and a retraction cylinder 7 are also provided. In a modification, Fig. 2 (not shown), the cylinder is connected to four secondary cylinders and in Figs. 3 and 4 (not shown) two primary cylinders are provided each having a pair of secondary cylinders. The secondary cylinders may be in vertical alignment with the primary cylinder.
Patent GB-1188145-A (GB)
Title: Method of Controlling the Torque of an Asynchronous Machine
IPC: H02P29/40
Filed: 1967-07-05
Abstract: 1,188,145. Control of A.C. motors. LICENTIA PATENT-VERWALTUNGS-G.m.b.H. 5 July, 1967 [5 July, 1966], No. 30959/67. Heading H2J. In a torque control system, a three-phase induction motor 3 is fed from a direct-current source Ug through inverter 1 whose output voltage is variable in frequency and amplitude. A signal Ii, representing the motor current, is compared with a reference signal Is, and the error signal is applied to a controller 4 for the inverter. A digital generator 5 is coupled to the motor and provides a rotational frequency signal fn which is added to a slip frequency signal fs to form a sum frequency signal f, the latter being applied to the controller 4 also. Function generators 11, 12 enable the signals Is and fs to be adjusted in such a manner that the main flux of the motor remains constant. A superimposed speed control is provided by analogue signal ni which is formed from the signal fn by converter 8 and is compared with reference signal ns. The difference signal is amplified and applied to the function generators 11, 12. A function generator 13 receives a signal dependent upon the slip frequency, and its output signal represents the phase angle between the stator current and main flux in analogue form. Unit 14 converts this output signal to pulse form for application to the controller 4. This enables rapid changes in the torque to be effected without a sudden change in the spatial relationship between the rotating field and the rotor taking place. To improve the dynamic behaviour of the motor at high speeds, the output of the function generator 13 is modified by a signal derived from the converter 8.
Patent GB-967898-A (GB)
Title: Polyphenyl ether compositions
IPC: C09K15/32
Filed: 1962-08-13
Abstract: A lubricating composition comprises at least one polyphenyl ether of the general formula <FORM:0967898/C4-C5/1> where n is an integer from 2 to 5, and a stabilizing amount of an organotin compound having one of the structures Ry-Sn-X4-y, where y is 1 to 4, and R3-Sn-Sn-R3, where each R is alkyl, aryl, aralkyl, aryloxyaryl, biaryl, thienyl or pyridyl, and X is halogen, or any of the radicals mentioned for R. Extensive exemplification of these compounds is provided.
Patent GB-998943-A (GB)
Title: Improvements in sheet metal contact
IPC: H01R13/502
Filed: 1963-08-06
Abstract: 998,943. Two-part couplings. ELCO CORPORATION. Aug. 6, 1963 [Aug. 9, 1962], No. 31021/63. Heading H2E. A sheet metal contact 12, is mounted in a resilient body 18, having a D-shaped crosssection which locates the body in a casing 50, and a flange 38 which abuts a shoulder in the casing 50 to provide a liquid-tight seal. The body 18, can be moulded round the contact 12, or the contact can be pressed into the body, in both cases the contact having a notch to engage the body 18. The contacts are arranged in the casing 50, in a pre-arranged geometrical pattern and connections are made to the contact tails 16 behind wall 74, and a potting compound is poured over these connections.
Patent GB-1244112-A (GB)
Title: Process for the manufacture of hardened cellular plastics materials from polyepoxide compounds
IPC: C08J9/14
Filed: 1969-06-19
Abstract: 1,244,112. Cellular hardened epoxy resins. FARBWERKE HOECHST A.G. 19 June, 1969 [19 June, 1968], No. 31032/69. Headings C3B and C3C. Hardened cellular epoxy resins are made by mixing together one or more polyepoxide compounds, a foaming agent, a hardener which is a cycloaliphatic polyamine containing at least 2 primary amino groups and 5-25% by wt. of an accelerator which is a polyhydric phenol. The polyepoxide may be a condensation product of epichlorhydrin with bisphenol A, dihydroxy-diphenyl methane or a novolak. The foaming agent may be n-pentane or monofluorotrichloromethane. The polyamine may be a hydrogenated condensation product of aniline and formaldehyde or 4, 4<SP>1</SP>-diaminodicyclohexyl. methane. The phenol may be a novolak. A pore regulator, e.g. a silicone oil may be used.
Patent GB-1065782-A (GB)
Title: False twist device
IPC: D02G3/18
Filed: 1963-12-03
Abstract: In a rotating, false-twist spindle, a glass fibre tow (74) passes through an axial passageway and one of four symmetrically disposed, radially extending slots (as at 88 or 92) in a removable end wall (82) in an outwardly flared portion of the passageway. The slot is laterally displaced from the spindle axis and the tow is forced against the radially outer end thereof.
Patent GB-208534-A (GB)
Title: Improved hygroscopic apparatus for controlling the operation of fog-signals
IPC: G01N19/10
Filed: 1923-12-11
Abstract: 208,534. Gas Accumulator Co. (United Kingdom), Ltd., (Assignees of Hingsburg, F. C.). Dec. 12, 1922, [Convention date]. Hygrometric apparatus. - A hygroscopic element, such as a bundle of human hairs, expanding with increasing humidity, is adapted by its expansion and' contraction to control an electric circuit &c. so as to operate a fog signal when a sufficient degree of humidity is reached. The hygroscopic element 11 is mounted in an open casing 1, being stretched between clamping - plates 12. Also mounted on a pivot 23 in the casing is a member 20 connected to the element 11 by a link 25 having an aperture through which the element passes. The member 20 has at its upper end a counterweight 21 and at its lower end a contact 30 adapted, when the element 11 expands sufficiently, to engage an adjustable contact 34. The member 20 is connected by a tension spring 31 to an adjustable screw 32. Engagement of the contacts 30, 34 completes a circuit which operates the fog signal, either directly or through a relay 50. The Specification as open to inspection under Sect. 91 (3) (a) states that the apparatus may be used to control a valve or the flow of gas &c. through a conduit. This subject-matter does not appear in the Specification as accepted.
Patent GB-1186517-A (GB)
Title: Improvements in or relating to Gas Density Apparatus
Inventor: CLARK ANTHONY JOHN
IPC: G01N9/20
Filed: 1966-07-12
Abstract: 1,186,517. Measuring gas density photoelectrically. B.P. CHEMICALS (U.K.) Ltd. June 28, 1967 [July 12, 1966], No.31141/66. Heading G1A. Apparatus for measuring the density of a gas comprises a rigid quartz bar 1, pivoted about a horizontal axis at its centre of gravity, having a hollow quartz bulb 2 at one end and a solid counterweight 3 at the other end mounted within a metal block having vertical slots for the bar and suspension and chambers for the bulb and counterweight and gas inlet and outlet openings. Displacement of the bar is detected by an interruption of light path by the counterweight 3, whereupon an appropriate restoring force is generated to bring the bar back to its horizontal position. As shown in Fig. 1, the restoring force is produced by two electromagnetic coils 15, 16, in series or in parallel, acting on permanent magnets 5, 6 mounted on the bar, and a current recorder 17 is provided. Alternatively, electrostatic restoring forces may be used, the voltage applied to an electrode near the bulb, which may be aluminized, or counterweight to maintain the bar in a horizontal position being measured. Further channels are provided in the block to ensure that all slots and chambers in the cell are open at both ends and there is no dead space in which gas may be trapped.
Patent GB-798306-A (GB)
Title: Improvements in or relating to the attachment of screened electric connecting cablesto electrical apparatus
IPC: H05K9/00
Filed: 1955-11-01
Abstract: 798,306. Earth-continuity couplings; twopart couplings. TELEFUNKEN, GES. Nov. 1, 1955 [Nov. 2, 1954], No. 31191/55. Class 38 (1). A screened cable 5 supplying apparatus such as a car radio in a metal container 1 over a plug connector 2, 3 is removably supported from, and earthed to, the container by a press-stud fastener 4, 6, of which the stud 6 is soldered to the screening 7.
Patent GB-1153657-A (GB)
Title: Improvements in or relating to Electronic Teleprinter Receiving Apparatus
Inventor: DOUGLAS FRANK WILLIAM
IPC: H04L17/30
Filed: 1967-07-06
Abstract: 1,153,657. Electrically controlled printing machines. MARCONI CO. Ltd. 22 Feb., 1968 [6 July, 1967], No. 31213/67. Heading G4H. In a teleprinter the position of the printing cylinder is indicated by a pulse generator comprising a half-toothed disc 1 and two opposite reading heads 5, 6 providing pulse sequences in succession in alternate parts of the cycle. The disc rotates with the printing cylinder which carries letter characters on the half corresponding to the toothed part of disc 1 and figures on the other half. There are 32 teeth each corresponding in one half cycle to a letter character, producing pulses on leads 9 and, in the other half cycle, each corresponding to a figure and producing pulses on leads 10. Characters are received in 5-bit code in a shift register (18, Fig. 2, not shown) and transferred via a buffer store (24) to a counter (25). A gate circuit (36) recognizes control characters in the counter, as a letter shift, figure shift, spacing or other control characters. A flip-flop (17) is set by a letter shift and reset by a figure shift and is used to gate (at 31, 32) the corresponding one of the trains of pulses from the pick-up heads 5 or 6 to the counter (25). When the count is reduced to zero a gate 33 responds and causes printing, the appropriate letter or figure then being in the printing position. The first of the letter pulses sets a flip-flop (13) and the first of the figure pulses resets it. The outputs of this flip-flop are gated (at 14, 16) with the outputs of the flip-flop (17) referred to above and the combined output used to shift the information from the register (18) to the counter.
Patent GB-942015-A (GB)
Title: A process for separating naphthoquinone from mixtures containing it
Filed: 1962-08-14
Abstract: <PICT:0942015/C2/1> In a process for separating naphthoquinone from mixtures which contain naphthalene preferably amounting to not less than half the quantity of naphthoquinone, in addition to a substantial amount of naphthoquinone, and also containing phthalic anhydride, the mixture is treated with water at an elevated temperature until the phthalic anhydride has undergone hydrolysis, the naphthalene phase and the aqueous phase are separated from each other at a temperature at which the two phases are liquid, and then at least the naphthalene liquid phase, which contains a large proportion of a naphthoquinone, is subjected to fractional counter current extraction to separate the naphthoquinone from the naphthalene. The fractional counter current extraction is carried out with the use of a polar water-miscible organic liquid of low molecular weight e.g. an aliphatic oxygen-containing compound such as methanol, which is advantageously aqueous as solvent for the naphthoquinone, and of an organic liquid of very low polarity e.g. an aliphatic hydrocarbon containing 4 to 10 carbon atoms such as heptane, as solvent for the naphthalene.  The aqueous phase which has been separated from the naphthalene phase and contains phthalic acid and a small proportion of the naphthoquinone is subjected to counter current extraction to extract the naphthoquinone from the aqueous phase.  Preferably the substantially water-imiscible organic solvent of low polarity used for extracting naphthoquinone from the aqueous phase is the same as the solvent used for extracting the naphthalene from the naphthalene phase, and the solvent containing the naphthoquinone from the aqueous phase is transferred to the extraction system in which the naphthoquinone is extracted from the naphthalene phase.  In an example a mixture obtained from the catalytic oxidation of naphthalene and consisting of 5 parts each of naphthoquinone, napthalene and phthalic anhydride, is mixed with 100 parts of water having a temperature of 82 DEG C., which hydrolyses the phthalic anhydride and melts the naphthalene which dissolves the naphthoquinone.  On standing two layers form and are separated in the separator 1, the lower layer, consisting of 5 parts of naphthalene, 4.5 parts of naphthoquinone and traces of phthalic acid, is subjected to fractional extraction at 55 DEG C. in the column II with the use of a solvent system consisting of heptane and aqueous methanol of 85% strength and the point of introduction of the naphthalene phase may be located at the centre of the extraction system. From the upper aqueous layer, containing substantially all the phthalic acid and about 0.5 part of naphthoquinone, the naphthoquinone is extracted in the column III at 80 DEG C. with heptane under a slightly superatmospheric pressure.  The heptane phase may be introduced into column II at a suitable point, for example approximately at the lower third.