baber/WOPTO huggingface dataset:
Patent GB-637650-A (GB)
Title: High clarity cellulose esters
IPC: C08B3/22
Filed: 1946-12-20
Abstract: Cellulose organic esters are purified by adding to a solution of the ester a non-solvent miscible with the solvent used, the non-solvent being added until precipitation begins, then heating till the ester redissolves, cooling till a minor fraction is reprecipitated and separating the precipitate from the solution of purified ester remaining.  The solution obtained is preferably evaporated until a further precipitate appears, sufficient non-solvent is added to precipitate the greater part of the remaining ester and the precipitate is separated.  This second precipitate is substantially free from colour and hazeforming bodies and develops little or no colour during moulding.  The preferred solvent is acetone, the strength of the ester solution being 5-20 per cent and the preferred non-solvent is ethyl alcohol.  The process is applicable to cellulose acetate, propionate, butyrate, acetatepropionate and acetate-butyrate.  In purifying cellulose acetate, the solution after addition of the non-solvent is heated to 35-45 DEG  C. to give a clear solution, which is cooled by about 4-15 DEG  C. to 30-40 DEG C. to give a precipitate amounting to 10-22 per cent of the ester. After decanting, the supernatant liquid is heated to 60-67 DEG  C. under pressure until sufficient acetone is evaporated to cause incipient precipitation of the ester, and then sufficient non-solvent added to precipitate 70-80 per cent of the acetate initially employed.  The first precipitate and the final solution may be used for spinning.  In an example (all parts by weight), 75 parts of cellulose acetate are dissolved in 425 parts of acetone at 22 DEG  C. 720 parts of ethyl alcohol are added with stirring, precipitating part of the ester, and the solution heated to 40 DEG  C., then kept at 36 DEG  C. for 15 hours.  16 parts of cellulose acetate precipitate and the supernatant liquid is decanted.  The solution is heated, acetone being recovered, and the bulk of the ester precipitated at 67 DEG  C. by further addition of alcohol.  The purified ester has an improved yellowness coefficient as defined in the Specification.  The purification of cellulose propionate by fractional precipitation with aqueous ethyl alcohol from acetone solution according to the process of Specification 637,342 is disclaimed.
Patent GB-339492-A (GB)
Title: Blading for steam and gas turbines
IPC: F01D5/30
Filed: 1929-12-09
Abstract: 339,492. Wagner, R. Dec. 9, 1929. Reflexed-flow type.-In an elastic-fluid turbine having buckets b of the double Pelton type with radial admission through a passage e, the buckets are arranged so that the stream lines c, c, d, d of the fluid diverge towards the axis of the rotor a. The outer sides of the buckets form a closed smooth rim h and they may be formed by milling. Fig. 4 shows them provided with saw-tooth roots k by which they are fixed to the rotor. Fig. 6 shows an arrangement in which the exhaust from a rotor m, built as described above, is used in axial-flow rotors n.
Patent GB-1155609-A (GB)
Title: Improvements in or relating to Filters
Inventor: WALLACE WALTER MAY
IPC: B01D35/20
Filed: 1966-08-24
Abstract: 1,155,609. Rotary filter. SIMONACCO Ltd. 10 Aug., 1967 [24 Aug., 1966], No. 37881/66 Heading B1D. [Also in Division E2] In a filter in which a drum or plurality of inward-flow filter discs rotate in a trough 11 of slurry, solids being blown from the discs by pulsed air outside the trough, the slurry level in trough 11 is monitored and the air blowing interrupted as the level falls so that solids build up and filtration slows down to restore level. Slurry enters trough 11 at 12, and the level is monitored in a connected tank 20, which has a small water flow from 22 to 23 to exclude the slurry, by a float 21. Float 21 is connected by a lever linkage to a shaft bearing a row of six angularly stepped cams 30 which control six mercury switches 31.. As float 21 falls, successive switches, 31 assume closed positions. Each switch 31 is connected in a series circuit with a switch (54), and switches (54) are each closed suc cessively for one sixth of a complete turn of timer shaft (52) which is continuously rotated (Figs. 2, 3, not shown). The circuits serve to energise solenoid 42 whenever one of them is closed, so that the solenoid will be energised for a variable portion of the cycle if float 21 falls below its highest position. Air is supplied to the interiors of sectors of the discs by a valve 70 which is reciprocated, to pulsate the air, by a lever 44 operated by a tappet 64. The connection between lever 44 and tappet 64 is made by a spring-loaded wedge (48), which is normally urged to lock a rod (45), abutting the tappet, to its surrounding sleeve (43), carrying lever 44, but is moved to break the connection when solenoid 42 is energised (Figs. 4, 5, not shown). 1,155,613. Aerating liquid E. L. MINGES. 4 July, 1966 [18 April, 1966], No. 29845/66. Heading B1C, [Also in Division G3] Apparatus controlling the flow of fluid, such as water to a carbonator, comprises a pump 19 delivering the fluid through a valve 22 and flow meter 39 to a tank 11. The meter 39 rotates a gear 43 at a rate proportional differs, the shaft 53 moves axially to adjust to the flow, the gear 43 being in mesh with a gear 49 mounted on a threaded shaft 51. A second shaft 52 is screwed into the shaft 51 and carries a gear wheel 53 which meshes with a wheel 54 rotated by an electric motor 57. The motor is set at a speed' proportional to the required flow and when the actual flow a bleed valve 32. The valve 32 determines the air pressure in a line 26 which adjusts the valve 22 against a spring loading 23 to maintain the flow at the required value.
Patent GB-925131-A (GB)
Title: Improvements in extrusion apparatus
IPC: B29C48/691
Filed: 1961-10-24
Abstract: 925,131. Extrusion machines. STERLING EXTRUDER CORPORATION. Oct. 24, 1961 [Dec. 5, 1960], No. 38105/61. Class 87(2). Moulding apparatus includes a screen assembly 12 comprising, an intake member 17 mounted on a screw extruder (not shown) to receive plastic material therefrom through its inlet 32 and via a valve 34 permitting flow to one or other of two passages 35, 36 which terminate in cavities 37, 38 each arranged to receive a screen unit 13, a discharge member 18 mounted on a moulding apparatus (not shown) and provided with a valve 51 for selectively connecting a discharge recess 53 with one or other of two passages 49, 50, and two positioning members 19, 20 secured by releasable devices to the intake and discharge members 17, 18 and provided with passages 47, 48 whose ends are arranged to communicate with a screen unit 13 and the passages 49, 50 respectively in the discharge member 18. The screen unit 13 comprises a wire mesh screen 14 and a breaker plate 15 provided with apertures 40 and is clamped in sealing contact between the positioning members 19, 20 and the intake member 17. Said releasable devices comprise pivoted eye bolts. The intake and discharge members 17, 18 are adjustably spaced by a pair of screws 73. Electrical heating means may be provided on the screen changer 12.
Patent GB-1200925-A (GB)
Title: Improvements in or relating to the production of photographic light-sensitive materials
IPC: G03C1/74
Filed: 1967-08-18
Abstract: 1,200,925. Coating webs. FUJI SHASHIN FILM K.K. 18 Aug., 1967 [18 Aug., 1966], No. 38279/67. Heading D1L. A web 1 is coated with liquid 2 from a device 7 having a slot-shaped nozzle and excess liquid is removed by an air doctor 6. The excess liquid is recycled via a chamber 9 in which it is mixed with fresh liquid, filtering and defoaming means (not shown), and a metering pump 8 to coating device 7. The distance between nozzle and web may be 0.05- 0.5 mm. The distance between point of coating and excess removal may be 0-20 mm. The initial coating may be 1.5-3 times the final coating, which maye have a thickness of 0.2-3 microns. The coating speed may be 10-20 m/min. A light-sensitive emulsion or a protective layer may be applied to a photographic film base, the final coating being chilled, set and dried.
Patent GB-802606-A (GB)
Title: Method and apparatus for packing filled bags within bales
IPC: B65B63/02
Filed: 1956-12-17
Abstract: 802,606. Packaging. ST. REGIS PAPER CO. Dec. 17, 1956 [Dec. 29, 1955], No. 38454/56. Addition to 773,979. Class 94(1). The final step of the method described and claimed in the parent Specification is effected by vibrating the filled bale to cause the girth of the group of bags within the bale to increase so that the bags tightly fill the bale. Groups of bags are conveyed to a platform 100 as described in the parent Specification and each group is urged by a ram (not shown) against a stop plate 101 so that the group is compressed in a direction corresponding to the maximum dimension of its transverse cross-section. A second ram (not shown) then descends to flatten the top of the group and the compressed group is moved by a ram 105 through a funnel 102 which supports a bale 106. The funnel is similar to that described in the parent Specification and comprises a pair of relatively movable duck bills which hold open the mouth of the bag. As the ram 105 completes its stroke the filled bale is released by the funnel so that it moves down a rollerway 108 and falls base downwards on to a settler conveyer unit 109 comprising a resiliently-mounted plate 110, reciprocated in an upwardly-inclined direction by a motor-driven eccentric, and two side plates 111 and 112. The unit 109 may be similar to that described in Specification 787,088. In a modification, Fig. 4 (not shown) the bales fall from the rollerway 108 on to an endless conveyer which passes over a plate similar to the plate 110.
Patent GB-947431-A (GB)
Title: Improvements in or relating to egg cartons
Inventor: BUCKHURST ARTHUR CHARLES
IPC: B65D85/32
Filed: 1961-10-27
Abstract: 947,431. Egg cartons; packages. BRITISH CELLOPHANE Ltd. Oct. 25, 1962 [Oct. 27, 1961], No. 38571/61. Headings B8C and B8P. An egg carton consists of a rectangular moulded pulp or foamed plastic base member 3 recessed to receive the eggs 4 and a rectangular retaining member 5 having apertures corresponding to said recesses and having flaps 10 at each end, both enclosed by a tray with end walls 12 extending above the top of the eggs and having inwardly-directed flanges 11 at the upper edges and side walls 13 with a portion cut away for viewing the eggs, the tray being completely enveloped and sealed against moisture and odour by a transparent overwrap of heat sealable cellulose film which keeps the carton rigid. Alternatively, the base may be of vacuum-moulded polyvinyl chloride. The overwrap may be nitrocellulose/wax composition or a vinylidene chloride copolymer. The corner pillars 8 and at least one of the central partition pillars of the base member may be raised to form supporting pillars for the retaining member 5.
Patent GB-923257-A (GB)
Title: Improved delivery pump for lubricants or other liquids
Inventor: TRAVIS ROBERT WILLIAM
IPC: F16N13/22
Filed: 1960-11-10
Abstract: 923,257. Reciprocating pumps. LUMATIC Ltd. Nov. 9, 1961 [Nov. 10, 1960], No. 38643/60. Class 102(1). A fluid pressure operated lubricating oil pump comprises a plunger 26 with a non-return valve 54, Fig. 2, in the end thereof leading to a bore 49 which terminates in a recess 50 which registers in succession with delivery ports 58, 59, leading to different lubricating points. The plunger is operated by pneumatic or hydraulic pressure applied to a piston 27. An auxiliary manual operating knob 35 is provided. The lubricating oil is supplied to the suction port 30 by a spring loaded piston 18 in a reservoir 4. As the plunger 26 descends the oil is forced through the bore 49 to the recess 50 and thence into the delivery ports 58, 59, in succession.
Patent GB-1460422-A (GB)
Title: Heat exchanger plates
IPC: F28F3/08
Filed: 1973-08-16
Abstract: 1460422 Plate heat exchangers APV CO Ltd 15 July 1974 [16 Aug 1973] 38787/73 Heading F4S In a heat exchanger comprising a stack of gasketed and ported heat exchange plates 1 each formed with a plurality of corrugations or lines of dimples or similar formations which, in use, cross and abut corresponding corrugations or formations of adjacent plates to provide interplate support, the areas between the ends or the corrugations or similar formations and the gasket groove 6 are provided with pressed triangular indentations or protrusions 8. These triangular indentations or protrusions 8, which are normally of reduced height or depth as compared with the corrugations or similar formations, serve to improve the stiffness of the plate. Similar pressed triangular indentations or protrusions may additionally be provided at the junction between zones of the main heat transfer zone 5 having different patterns of corrugations or formations, and at the junction between the distribution or collection area 4 and the main zone 5.
Patent GB-1284544-A (GB)
Title: Polishing materials
IPC: A61N/
Filed: 1969-08-04
Abstract: 1284544 Agglomerated materials COLGATEPALMOLIVE CO 4 Aug 1969 [5 Aug 1968 (2)] 38954/69 Heading C1A An agglomerated material e.g. dicalcium phosphate, sodium metaphosphate, calcium carbonate, hydrated alumina, zirconium silicate or various other phosphates, MgCO 3 , SiO 2 , aluminium silicate or polymethyl methacrylate, which material is suitable for use as a toothpaste ingredient, comprises water-insoluble dental polishing, particles of the agglomerated material being visible to the naked eye (preferably of size less than 2380 microns) and palpable and substantially retaining their identity in the toothpaste and in the presence of saliva but being easily reducible by toothbrushing to individual particles of polishing agent each of which is fine, impalpable and invisible to the naked eye. The polishing agent is blended with a binding agent e.g. polyethylene glycol, gum acacia, or polyvinyl pyrrolidone. The blend of polishing agent and binding agent or with a tabletting agent may be compressed into tablets which are then broken down into the agglomerated particles. The agglomerates may be coloured by a dye or pigment and may be incorporated into translucent or transparent gel type toothpastes or into opaque toothpastes as described in Specifications 1,284,546 and 1,284,545 (see Division A5).
Patent GB-1512545-A (GB)
Title: Ionisation fire sensors
IPC: G08B17/11
Filed: 1975-09-23
Abstract: 1512545 Smoke detectors CERBERUS AG 23 Sept 1975 [23 Sept 1974] 38981/75 Heading G1N A fire sensor includes two series-connected ionization chambers 1, 2 the junction point of which is connected to the gate 6a of F.E.T. 6 the source voltage of which is set by a Zener diode 12 in the source return lead to terminal 4, and the gate voltage of which is adjustable by variable resistance 15 which together with resistor 14 forms a voltage divider across terminals 3, 4. In the quiescent condition power consumption is small since current flow through the F.E.T. and Zener diode is small whilst allowing sufficiently large current to be drawn, in an alarm condition, to trigger the S.C.R.11 due to the Zener characteristic. The gate potential adjustment by variable resistance 15 allows adjustment of the sensitivity or changeover point but the resistances 14, 15 are of high value so as to draw only a small current.
Patent GB-1512689-A (GB)
Title: Pallets
IPC: B65D19/06
Filed: 1976-10-21
Abstract: 1512689 Load handling pallet READY CASE Ltd 21 Oct 1976 [23 Sept 1975] 39005/75 Heading B8H A pallet for supporting a packing case, comprises three spaced, parallel supports 1, 2, 3 each formed of three blocks 7, 8, 9 connected by upper and lower strips 10, 11 and three transverse strips 4, 5, 6 connected to the lower strips 11 to maintain the supports in spaced relation. Each of the upper strips 10 has a lateral projection 12 extending beyond the sides of the blocks whereby straps (not shown) may be passed around the packing case and under the projections to secure the packing case to the pallet. A cut 14 is provided at each end of each upper strip 10 to provide some resilience in the connection and thereby prevent the upper strip from being torn away from the blocks. The packing case may be additionally fixed to the pallet by stud and socket fasteners, Fig. 3 (not shown).
Patent GB-890774-A (GB)
Title: A new steroid derivative, its preparation and conversion into therapeutically useful compounds
IPC: C07J75/00
Filed: 1960-11-14
Abstract: The invention comprises 2-bromo-testosterone and a process for the preparation thereof by reacting 2-methoxyoxalyl- or 2-ethoxyoxalyl-testosterone having the formula <FORM:0890774/IV (b)/1> in which R represents either a methyl or an ethyl group, with bromine in an alkaline medium.  Subsequently HBr may be eliminated from the product to obtain D 1-testosterone, e.g. using a lithium bromide, lithium carbonate couple.
Patent GB-1074229-A (GB)
Title: Improved centrifuge
Inventor: SIEPE WERNER
IPC: B04B3/00
Filed: 1965-09-15
Abstract: A vertical frusto-conical upwardly-diverging centrifuge drum (1), Fig. 1 (not shown), has a solid stub shaft (3c) at its lower end mounted in bearings (6) and incorporates an upwardly-converging hollow conical member (3) mounted on the drum base plate (2) and ending in a short cylindrical portion (3b) mounted in bearings (7) carried by the removable cover (8) of casing (9).  For heating, the conical member (3) may be surrounded by a stationary induction coil (19), or it may be formed of resistance alloy and constitute part of the secondary circuit of a transformer, the primary coil (20) of which is secured to the underside of plate (2) and energised through slip-ring (21). Feeding of material for centrifuging is by an upper feed nozzle (5), conical member (3) and peripheral slots (3a) in the lower end of the conical member.  The slots (3a) may be regulated by counter-weighted, or spring-loaded, or resilient flaps.
Patent GB-862362-A (GB)
Title: A railway spike
Inventor: JACK ARTHUR CORBUS
IPC: E01B9/08
Filed: 1959-11-19
Abstract: 862,362. Spikes. LOCKSPIKE Ltd. Nov. 19, 1959, No. 39323/59. Class 89(2) A rail-spike comprises a bar of resilientmetal folded approximately in half to form a head 1 and legs 2, 3, which extend parallel and close to one another at their ends 4, 5, remote from the head. The head is looped to provide a driving-portion 8, and adjacent the loop, leg 2 has a part 9 parallel to and spaced from the longitudinal-axis 7 of the spike, followed by a parallel-part 10 offset nearer the axis. Leg 3 has a part 11 adjacent the head sloping towards the axis and followed by a part 12 parallel to and spaced from the axis. The legs then diverge at 13 and converge at 14 into the ends 4, 5. In use, part 9 engages the side of a rail-flange 26, and the shoulder between parts 9, 10, limits the depth of insertion of the spike into sleeper 27, by engaging a base-plate 22, to prevent the head-loop from contacting flange 26. Specification 671,017 is referred to.
Patent GB-973743-A (GB)
Title: Machine tool and the like programme control
IPC: G05B19/23
Filed: 1960-11-17
Abstract: 973, 743. Programme control of machine tools. TELEFONGYAR. Nov. 17, 1960 [Nov. 20, 1959], No. 39560/60. Heading G3N. Programme information for machining rectilinear surfaces is held digitally in a magnetic store, and information for curvilinear surfaces is separately generated as an analogue signal. Information on distance, velocity and sign, together with selected auxiliary functions is entered by hand on a perforated tape in binary coded form. The. tape is fed into an undisclosed computer which is said to have a magnetic store 5. The information is read out from the store and routed by an undisclosed unit 6 so that the distance is passed to a register 9 and sign and velocity to a unit 7 which is said to provide an analogue signal. A commutator disc or optical grating on the machine tool (not shown) produces incremental pulses which are compared in a subtraction unit 10 with the distance command signal in register 9. An analogue unit 8 consists of two non-linear potential dividers, Fig. 2 not shown, which provide the x and y axis velocity signals when rotated by a stepping motor by the X axis measured distance pulses. This is stated to enable corners to be machined.
Patent GB-937046-A (GB)
Title: Aero- or hydro-dynamic bodies
Inventor: DONATH HANS
IPC: B64C21/02
Filed: 1959-11-21
Abstract: 937,046. Aerofoils; hydrofoils. FLUGZEUGWERKE DRESDEN VEB. Nov. 21, 1959, No. 39590/59. Classes 4 and 113. An aero- or hydrodynamic body has a fluid passageway extending transversely therethrough, a trailing edge part of the body which defines the passageway being pivotable about a displaceable axis, and being movable in response to differences in dynamic and/or static conditions on opposed flow surfaces of the body. In the Figure devices 4 and 5 responsive to the dynamic or static pressures on the upper and lower surfaces respectively of a wing are connected by ducts 8, 9, to a spring biased piston 10 operating a reversing switch 15 of a motor 16. The motor shaft 17 works in a nut on the trailing edge part 2, which is supported from the main body of the wing by links 18, 19. The devices 4 and 5 thus alter the slot between wing 1 and part 2, and control the wing boundary layer and the passage of air through the slot, to prevent flow breakaway. Alternatively, a pivotable, slot-forming flap may have its pivotal axis displaced horizontally or vertically by the devices 4 and 5.
Patent GB-838740-A (GB)
Title: Improvements in controlling means for a hydraulic press
IPC: B30B15/16
Filed: 1957-12-20
Abstract: 838,740. Control valves for hydraulic presses. SCHLOEMANN A.G. Dec. 20, 1957 [June 30, 1957], No. 39603/57. Class 69 (2). An hydraulic press is controlled by identical inlet and outlet poppet valves (not shown). Each valve can be lifted from its seat by a corresponding piston 30 raised by liquid pressure supplied via lines 38, 51, 50, only if (a) piston 30b is in its lowest position and hence the other valve is closed ; (b) electromagnet 47 is actuated to hold slide valve 45 in its upper position; failure of electric current closes both valves immediately.
Patent GB-846412-A (GB)
Title: Improvements in or relating to coal-cutting apparatus
Inventor: PROCTOR SIDNEY ERNEST
IPC: E21C25/28
Filed: 1957-12-20
Abstract: 846,412. Mineral-mining equipment. HOY & CO. Ltd., A. March 20, 1959 [Dec. 20, 1957], No. 39732/57. Class 68(1). A coal cutter chain wherein some of the picks 43, 44 are provided with a broad cutting edge extending over an arc in a direction transverse to the direction of movement of the chain. Preferably said picks are double edged, having a cutting edge facing each way along the chain. A number of preferred shapes of these picks are specifically described.