baber/WOPTO huggingface dataset:
Patent GB-734466-A (GB)
Title: Electronic tone generator
IPC: H03B5/22
Filed: 1953-09-29
Abstract: 734,466. Automatic exchange equipment. AUTOMATIC ELECTRIC LABORATORIES, Inc. Sept. 29, 1953 [Oct.. 8, 1952], No.26734/53. Class 40 (4). In an electronic tone generator, the output of an oscillator is modulated by an alternating current from the supply mains, and is applied to an amplifier from a tapping point in a network forming the modulator load. Identical " dial " and " busy " tones are produced by modulating the 600 c.p.s. output of the Wien bridge type resistance-capacity oscillator 100 with the second harmonic of the 60-cycle supply in a modulator 129 which includes non-linear resistances 126, 127. The oscillator 100 is locked to the supply by applying a tapping from the source over a condenser 215 to the junction of resistors 115, 116 in the grid of the right-hand portion of duplex valve 110 and in consequence a wave-form such as shown in Fig. 4a is maintained. Resistance 104 in the connection between the plate of the right-hand portion of valve 110 and the cathode of the left-hand portion serves to control the amount of feedback and enables the production of a good sine wave. The output of modulator 219 is applied over a network comprising resistors 231, 235, and inductance 276 to a buffer amplifier comprising the left-hand section of valve 230 from whence it passes to a phase inverter comprising the right-hand portion and a push-pull amplifier comprising valves 250, 260. Negative feedback to the buffer amplifier from inductance 276 ensures a constant output. The amplifier circuits for " dial " and " busy " tones are identical but the busy-tone is stated to be externally interrupted. The final stages of the 400/40 ring-back tone generator comprising valves 300, 310, 320 are also identical with those above, but the output of the 400-cycle oscillator 130 is keyed by a non-linear resistor 160 in the cathode circuit of the right-hand portion of valve 170 which valve is wired as a multi-vibrator giving a square wave 40 cycle per second output. In this case too the oscillator 150 is locked to the oscillator 130 by a connection between the output of the latter and the left-hand grid of the former over a condenser 155.
Patent GB-444321-A (GB)
Title: Improvements in drawbar coupling arrangements for vehicles
IPC: B62D13/04
Filed: 1934-09-18
Abstract: 444,321. Couplings for vehicles. SKINNER, A. T., Stafford House, Stafford Road, Sidcup, Kent, and WAIGH, R. A. L., 7, Hughenden Avenue, Kenton, Middlesex. Sept. 18, 1934, No. 26755. [Class 103 (v)] A draw-bar d comprising spaced side cheeks is universally jointed at its ends to the draught vehicle, not shown, and to the chassis c of the trailer and forms a guide for the upturned end of a tiller bar h of which the other end is universally jointed to the axle a or other part of the trailer and which is connected, by a link n and universal joints m, o, with the steering mechanism l of the stub axle u of one of the front wheels of the trailer, the other front wheel being actuated by the track rod v. The tiller bar is provided with an antifriction roller p and is prevented from leaving the draw-bar by a nut r and washer q. In a modification the tiller-bar is provided with a crosshead carrying rollers which run in slots along the side cheeks of the draw-bar.
Patent GB-616420-A (GB)
Title: Improved power lift mechanism for agricultural tractor vehicles
IPC: A01B63/06
Filed: 1946-09-06
Abstract: 616,420. Operating clutches. FORRESTER, J. A. Sept. 6, 1946, No. 26802. [Class 80 (ii)] [Also in Groups I and XXX] A power-lift mechanism for a tractor comprises a reduction gear driven through a clutch 18 from a power take-off, the lower-speed shaft of the gearing being fitted with lifting cranks 7 which can be locked in either the fully-raised or fully-lowered position by a lever which simultaneously disengages the clutch. The reduction gear is housed in a gear-box 1 mounted on the tractor draw-plate 2. The input shaft of the gearing is driven through the clutch 18 by a chain and sprocket 20 from the power take-off. The lower-speed or output shaft 22 of the gear-box is fitted with crank discs 6 carrying lifting cranks 7 which operate on arms 8 connected by chains 16 to an implement 15, pivoted, by links 11, to the tractor chassis. Also fixed on the shaft 22 is a drum 27 having two peripheral slots 28 which may be entered by a roller 29 to lock the shaft 22 against rotation at the limiting positions of the arms 8. The roller 29 is carried on a lever 35 pivoted to a fixed stay 13 on the tractor chassis. A tail-piece 40 on the lever 35 is adapted automatically to release the clutch 18 when the roller enters a slot 28. The clutch (Fig. 9) comprises a driving member 43 having internal projections 44 coacting with a roller 45 carried by one end of a bell-crank lever 46 pivoted at 47a to the hub 48 of the driven part 42 of the clutch. The other end of the bell-crank is extended to form a lug 41 which is engaged by the tail-piece 40 to trip the clutch. A projection 52 on the clutch coacts with a further lever 49 to prevent accidental reverse rotation of the driven part 42 after the clutch has been tripped.
Patent GB-832636-A (GB)
Title: Improvements in or relating to the preparation of pigments
IPC: C09C1/40
Filed: 1956-09-03
Abstract: A pigment, particularly for use in paper-making, but also useful for rubber, paints or ceramics, is prepared by reacting in an aqueous medium with vigorous agitation, and in the substantial absence of cellulosic fibres, a soluble calcium salt and a soluble silicate to form a finely-divided hydrated calcium silicate precipitate, and reacting said precipitate without drying with a sulphate of aluminium in an amount of at least 1% by weight of Al2O3 based on the calcium silicate to produce a finely-divided insoluble reaction product pigment.  Up to 25% of the sulphate of aluminium may be employed; this may consist of aluminium sulphate per se, or ammonium, potassium, or sodium alum, and may be formed in situ in the reaction mixture from sodium aluminate or aluminium hydroxide, and sulphuric acid.  The product may be added to paper in an amount of from 1 to 25% by weight of the pulp fibres.  The reaction may be carried out in a centrifugal pump or in the beater of a paper-making machine. Specification 769,037 is referred to.
Patent GB-1279631-A (GB)
Title: Improvements in and relating to blanks moulded from fibre and containers manufactured therefrom
Inventor: BURROWS MILES GOVAN
IPC: B65D1/22
Filed: 1968-06-06
Abstract: 1279631 Moulded boxes DEUTSCHE FIBRIT GESELLSCHAFT EBERS & DR MULLER mbH 8 Sept 1969 [6 June 1968] 26892/68 Heading B8P A box blank of moulded wood fibre has a central base 10 and side and end walls 12, 14 folded up from the base, there being reinforcing posts 18 formed at the corners by triangular indentations moulded into the side and end walls. An indentation 20 at each corner of the base forms an abutment for the indentations 18. The box is erected manually or automatically and the corners are held together by an adhesive, by stapling, or by clips. The base may be strengthened by ribs. The cut-away portions at the top of the sides provides ventilation when the boxes are stacked. A hinged lid may be provided.
Patent GB-650236-A (GB)
Title: Improvements relating to border frames for spring upholstery
IPC: A47C23/053
Filed: 1948-10-15
Abstract: 650,236. Spring Upholstery. EXPOR SA SOC. ANON. Oct. 15, 1948, Nc 26909. Convention date, Sept. 25 [Class 52 (iv)] A border frame 2 is connected to th peripheral springs of an assembly by passing the top coils 1 through slits 4 in the frame into slots 3 cut therein
Patent GB-458282-A (GB)
Title: Improvements in holders for cosmetics, chalk, colophony, crayons or the like
IPC: A45D40/00
Filed: 1935-09-30
Abstract: 458,282. Artificial flowers. SIEGERT, J., 1, Breitestrasse, Dresden, Germany. Sept. 30, 1935, No. 26967. [Class 63] [See also Groups XVII and XXVIII] A holder for toilet articles, of the kind formed with pivoted flaps 11, Fig. 3, which can close round and envelop the articles, e.g., a powder-box and puff 20 carried on legs 19, or be opened out in opposition to springs, is provided with, at least three, flaps 11 which simulate the petals of a flower. The petals embody levers 12 pivoted to the calyx of the flower at 13 where the springs tending to close up the petals are also situated, and the petals are opened out by pulling on chains &c. 16 connected to the petals. The inside of one of the petals may be adapted to serve as a mirror. In a modification, the levers 12 are pivoted on shafts carried by a base plate 22. Fig. 7, and the chains 16 are connected to resilient tongues 26. The act of pressing-in the tongues 26 to open out the petals may squeeze a rubber bulb 30 to eject perfume. Springs 27 return the petals to the closed position. Stamens 29 are provided.
Patent GB-1108196-A (GB)
Title: Polymerization of silacyclobutanes
IPC: C08G77/00
Filed: 1966-06-16
Abstract: At least one compound (a) of the formula <FORM:1108196/C3/1> is polymerized by contacting it, under anhydrous conditions, with (b) a compound of the formula R11mXnSiH4- mn, AlX3 or HX, in which R is a methyl or phenyl radical, R1 is H or methyl, R11 is a monovalent hydrocarbon or halohydrocarbon radical free of aliphatic unsaturation, X is Cl, Br or I, m is 0, 1, 2 or 3, n is 1, 2, 3 or 4, m + n being 3 or 4, so as to form a polymer consisting essentially of [-SiR2.CH2.CHR1.CH2-] units.  Component (b) can be present in amount of from 0.1 to 100% by wt. of (a). The reaction is preferably effected at 80 DEG  to 150 DEG  C.  In a typical Example (1) a solution of 1,1 - dimethyl - 1 - silacyclobutane and Me3SiCl was sealed and heated in a glass tube at 100 DEG  C. for 3 hours to yield a polymer consisting of [-Si(CH3)2.CH2.CH2.CH2-] units.
Patent GB-733857-A (GB)
Title: Improvements in screwdrivers
IPC: B25B23/10
Filed: 1951-11-17
Abstract: 733,857. Screwdrivers. CHENEY & SON, Ltd., C. W., and CHENEY, C. W. Nov. 17, 1952 [Nov. 17, 1951], No. 27017/51. Class 61. A screwdriver is provided with a slidable sleeve 4 spring pressed into a normal position in advance of the tip 2 and rotatable with the tip to prevent side slip of the blade. The sleeve is urged forwardly by coiled spring 7 disposed between the inner end of the sleeve and a fixed collar 3 on the shank 1. The shank is connected to the sleeve by engagement of a crosspin 5 in the slot 6. Specification 13151/42, as open to inspection under Sect. 91, is referred to.
Patent GB-853334-A (GB)
Title: Improvements relating to lubricating oil compositions
IPC: C07F5/06
Filed: 1957-08-29
Abstract: A mobile lubricating composition comprises a lubricating oil having dissolved therein up to 40% by weight of the composition of a polymeric aluminium compound On Alm Xp, where X is a group RCOO-, R being an aliphatic or aromatic hydrocarbon or substituted hydrocarbon radical, m, n, and p are integers, m is not less than 2, and the ratios m/n and m/p are within the ranges 0.75 to 2 and 0.5 to 3 respectively.  The Groups X in the molecule may be the same or different.  Where the amount of additive would normally convert the oil to a grease, mobility may be preserved by the addition of an anti-gelling agent, e.g. 8-hydroxyquinoline. Preferred oils are SAE 30, 40 and 50 mineral oils.  The Groups X are preferably derived from benzoic or salicyclic acids or C12-C20 aliphatic monocarboxylic acids, e.g. stearin or olein.  The preferred additives have the formula (I) O3Al3X3, where the Groups X may be the same or different. The additives may be prepared either by heating aluminium alcoholates with water and carboxylic acids, preferably in an inert non-volatile diluent such as lubricating oil, or by heating the aluminium alcoholates with carboxylic acids alone to form acyloxy aluminium alcoholate compounds and further heating the latter.  In examples, additive compositions consisting of (i) 40% wt. light lubricating oil and 60% wt. of a material of formula (I) wherein 2/3 of the groups X are derived from stearin 1/3 from benzoic acid, and (ii) 50% wt. isopropyl oleate and 50% wt. of a material of formula (1) wherein all the Groups X are derived from olein, are added to SAE 30 mineral oil of (a) 140 secs. Redwood I/140 DEG F. and V.I.65 and (b) 160 secs. Redwood I/140 DEG F. and V.I.95 respectively.  In the first case 1/2 % of 8-hydroxyquinoline was added to prevent grease formation and the resulting lubricant composition was compared with (a) a mixture of calcium C16-C18 fatty acid soap and calcium carbonate in the same base oil and (b) a water-in-oil emulsion containing calcium acetate in the aqueous phase.  The compositions are particularly suitable for the cylinder lubrication of engines operating on sulphur-containing fuels as described in Specification 853,335.
Patent GB-1292692-A (GB)
Title: Linear amplifier circuit
IPC: H03F1/32
Filed: 1970-06-05
Abstract: 1292692 Transistor amplifiers PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 5 June 1970 [10 June 1969] 27234/70 Heading H3T An amplifier circuit comprising two stages I, II each of which comprises two transistors T 11'  T 12'  T 21 , T 22  which have their emittercollector paths traversed by the same supply current, is characterized in that the base of the lower transistor T 12  or T 22  of one stage is connected to the emitter of the upper transistor T 21  or T 11  of the other stage. The input may be applied between the bases of T 11 , T 21  and the output may be taken across resistor L, which resistor may be an FET having its resistance variable to vary the gain. Two additional transistors t 1 , t 2 , having their bases connected to a reference potential may be provided to reduce the effect in the input of the collector/base capacitances of T 11 , T 21 . In a first modification, Fig. 3 (not shown), the bases of T 11 , T 21  are connected together, the input is -applied in place of the resistor L and the outputs are obtained from L 1 , L 2 . A second modification, Fig. 5 (not shown), comprises two groups of transistors each of which comprises more than one stage. The cross-coupling is between the base of the first stage of one section, and the emitter of the last stage of the other section. In a third modification, Fig. 6 (not shown), the resistor L is omitted, and the output is connected to the input of a second similar amplifier. A number of circuits may be connected in series, preferably using opposite conductivity transistors for successive circuits.
Patent GB-884977-A (GB)
Title: Improvements in or relating to an elastic coupling for universal-joint shafts or the like
IPC: F16D3/76
Filed: 1960-08-05
Abstract: 884,977. Resilient couplings. GELENKWELLENBAU G.m.b.H. Aug. 5, 1960 [Aug. 12, 1959], No. 27251/60. Class 80 (2). An elastic coupling between a shaft and a universal joint comprises rubber annuli 3, 4 having outer reinforcing members 11, 12 which are bolted together and inner reinforcing members 5, 8 bolted respectively to flanges 1, 2 of the shaft and joint. A centring ring 17 is disposed between the reinforcing member 5 and a collar 16 of the member 8.
Patent GB-616625-A (GB)
Title: An electric heater for brooders and other like poultry appliances
IPC: F42C15/26
Filed: 1946-09-12
Abstract: 616,625. Electrically-heated brooders. BANCROFT, H. W., and BANCROFT, E. H., (trading as AVICULTURAL & ZOOLOGICAL SUPPLY CO.). Sept. 12, 1946, No. 27380. [Class 39 (iii)] An electric heater for brooders comprises an open wooden frame A over the bottom face of which is secured an asbestos sheet B, the asbestos sheet B having disposed over its inner surface an electrical heating element C coupled to an electrical connection D. An insulating compound F spread over the surface of the asbestos sheet B holds the heating element C in position. A metal or other plate G is secured over the remaining open face of the frame A.
Patent GB-922778-A (GB)
Title: Improvements in and relating to rotary duplicating machines
IPC: B41L11/00
Filed: 1961-07-28
Abstract: 922,778. Copying documents &c. W. RITZERFELD, and G. RITZERFELD. July 28, 1961 [Aug. 19, 1960], No. 27412/61. Class 100 (2). A rotary duplicatingmachine for printing lines or sections from a master printing sheet on to a copy sheet in immediate succession or at a closer relative spacing than the lines or sections on the master sheet comprises a pair of printing elements, one of which is adapted for carrying the master sheet with the lines or sections thereof extending in the axial direction, means for controlling co-operation of the printing elements in accordance with a predetermined programme, means for feeding a copy sheet to a line of printing between the printing elements, and means for sensing a programme-indicating marking on the copy sheet and operating pre-setting means for the controlling means to allow printing of lines or sections corresponding to the indicated programme. In the embodiment of Figs. 1 and 2, a drum 2 is provided with a master sheet 3 and is coupled by gears 11, 12, 13 to the rotatable contact arm 9 of a multi-position rotary switch 10 having fixed contacts K1-K15. A counterpressure roller 4 is moved into a position cooperating with the drum 2 on the energization of an electromagnet 17 which acts through a link 35 on the junction pin 8 of a toggle linkage 6, 7. A copy sheet 19 is applied to the feed rollers 20, 21 and a marking 22 on the sheet is sensed by a photo-electric device 18 and the resultant impulse is amplified at 26 and causes a relay 27 to respond closing a multi-pole switch 28. The individual contacts 29 of the switch 28 close circuits to certain contacts K1, K2, K3, K5, K8, and K12 corresponding to a printing programme and the electromagnet 17 is energized when the arm 9 encounters those contacts of the switch 10 having closed circuits. A marking 38 on the margin of the sheet 19 is sensed by a device 18c which causes a relay 27c to open a switch 39. This switch is in series with relays 27, 27a and 27b and thus causes cancellation of a previously set programme. In the embodiment of Figs. 3-6 the printing drum 2 is provided with a plurality of pressure segments 40 and carries a master sheet 3. The segments are held in peripheral line with the drum 2 by springs 41, 42 with one segment underlying each line of the master sheet and each segment carries an axially slidable rod 43 having rollers 44, 45 mounted on its ends. On inserting a copy sheet into the feed rollers 20, 21 a programme-indicating marking thereon is sensed by a photo-electric device 23, 24 and a relay closes a multi-pole switch which closes circuits to selected electromagnets 51 arranged opposite the rollers 44 and moves corresponding rollers 44 into the active planes of cams 49 having raised parts 50 coincident with the line of printing A-B. The rods 43 which are moved outwardly when the rollers 44 contact the part 50 of the cam are retracted by a lever 54 after printing. The lever 54 may be moved into an inoperative position.
Patent GB-304169-A (GB)
Title: Improvements in mounting arrangements for automatic switches and the like
IPC: H04Q1/04
Filed: 1927-10-15
Abstract: 304,169. Automatic Telephone Manufacturing Co., Ltd., Kessler, F., Woodland, C. R., and McCrindle, J. C. Oct. 15. 1927. Addition to 291,151. Automatic exchange selectors.- Switch units are secured to a frame which comprises longitudinal angle members 4 and cross members 5 and which is mounted on pivots 6 carried by the end plates 3 of the channelshaped shelf 2. The frame is safely retained in the open position by means of a slotted arm 18 which slides over a pin 17, and when the frame. is closed, it is secured by bolts 7. The arrangement is applied to the mounting of line switches having a magnet 8, bank 9 and bank multiple 10. The line and cut-off relays 13 which are connected to the shelf cable 14 are mounted on the back of the shelf 2 with a cover 12, and the shelf carries a support for the terminal block 15 and for the external cables 16. Specification 291,151 is referred to.
Patent GB-994538-A (GB)
Title: A device for discharging a measured quantity of liquid, for example from a flushing cistern
IPC: E03D1/05
Filed: 1963-07-12
Abstract: 994,538. Siphon-discharge water-waste-preventers. E. N. CONTRACTOR. July 12, 1963 [July 12, 1962], No. 27716/63. Heading E1C. A device for discharging a measured quantity of liquid comprises a cistern T to be supplied with liquid, an inverted cup C therein on three or more legs in which is a discharge pipe A from the cistern T, having an opening near the top of the cup C above the normal liquid level therein when the cistern is filled and a liquid seal, and a member SL to raise the cup C to initiate discharge through the pipe A after filling the cistern T, an outlet P taking air displaced from the cup C in filling the cistern T. The liquid seal may comprise an S-shaped bend in the pipe A as shown in Fig. 1, filled during operation of the device, acting as an air trap, and by-passed by a pipe of smaller cross-sectional area than the pipe A forming the outlet P. In Fig. 2 the liquid seal comprises a chamber beneath the cistern T into which the lower end of the pipe A opens, above which end a second discharge pipe D opens thereinto to form the liquid seal. Anorifice K where shown in the pipe A provides an air outlet. The orifice K may be omitted if the lower end of pipe A is adjusted so that about “in. thereof is immersed in the seal. The displaced air then bubbles out through the water in the seal as the pressure in the cup C rises. In Fig. 5 pipe A is cone-shaped and the chamber B is within the cistern T and hence the second pipe D is partly within it. Air trapped and compressed within the cup C and pipe A when filling the cistern T can bubble out of the lower end of pipe A through the liquid in chamber B. Only a part of the pipe may be tapered. The cistern T may be supplied by means of an adjustable ball-float valve. The height of the pipe A within the cistern T is adjustable to vary the amount of discharge. The pipe A may be in two pieces, one within the cistern and the other outside it, which are connected together by check nuts to a coupling welded to the cistern bottom.
Patent GB-426729-A (GB)
Title: Improvements in and relating to the manufacture of beverages
IPC: C12G3/02
Filed: 1932-10-06
Abstract: Beverages of low alcoholic strength are obtained by fermenting saccharine substrates such as beer wort with a new variety of yeast pure-cultivated from fruit such as apples, cherries, plums, or grapes, and which does not decompose or only slightly decomposes the sugar present into alcohol and carbon dioxide.  The new yeast is similar in appearance to S. Cerevisiae, but is generally smaller, forms ascospores more readily, and ferments glucose and levulose most, saccharose and maltose slightly, and lactose not at all. According to an example beer wort boiled with hops is cooled, placed in a fermenter, and inoculated with these microorganisms.  After a primary fermentation for four to six days, the wort is taken to a storage cellar wherein it undergoes an after-fermentation for one to four weeks, after which carbon dioxide gas is added, and the liquor run into casks and pasteurized.  A beverage resembling beer and containing 0,2 to 0,3 per cent of alcohol is obtained.  Methods by which the microorganisms may be isolated are described.
Patent GB-298633-A (GB)
Title: Wheel for motor vehicles
IPC: B60B3/04
Filed: 1928-09-28
Abstract: 298,633. Knuttel, A. Oct. 13, 1927, [Convention date]. Tyre attachments to rims. -A cast-steel wheel disc 3 is formed integral with one half 2 of the rim, the other half 1 being secured by transverse bolts 4 the heads and nuts of which are preferably recessed into the rim-parts. The latter may be stiffened by means of webs 11. 12.