baber/WOPTO huggingface dataset:
Patent GB-533169-A (GB)
Title: Improvements in and relating to fluid-pressure actuated electric switches
IPC: H01H19/64
Filed: 1939-08-28
Abstract: 533,169. Actuation of switches. BRITISH THOMSON -HOUSTON CO., Ltd. Aug. 28, 1939, No. 24707. Convention date, Aug. 27, 1938. [Class 38 (v)] [Also in Group XXII] A movable contact 42 engageable with a spring- urged contact 40 with a wiping action, is separated against the action of an armature 43 and permanent magnet 44 of alloy disclosed in Specification 423,897, [Group II], by a rod 30 which is actuated by a lever 32 subjected to fluidpressure and to the control of an adjustable spring 36. The lever 32 is apertured to receive a shouldered pin 34 resting on a diaphragm 20, which is in the form of a cup of bronze or similar material inverted in a stepped recess in a hollow nut 13 to which it is soldered or brazed. The nut is originally provided at the top with projections, which are welded to the base plate 11 by passing a current through the two in contact so as to melt the projections. To prevent sudden pressure-changes from influencing the switch, the aperture 16 is closed by a disc 24 having a small orifice and held by spring ring 23.
Patent GB-371952-A (GB)
Title: Improvements in or relating to apparatus for the electrical reproduction of marking such as sound or picture records with the aid of light
IPC: G11B7/00
Filed: 1931-06-18
Abstract: 371,952. Reproducing sound records ; copying-telegraphy. GRAMOPHONE CO., Ltd., Hayes, HEAL, H., 24, Dane Road, Southall, both in Middlesex, and BROWNE, C. O., 258, Monk's Drive, West Acton, London. June 18, 1931, No. 24712/30. [Class 40 (ii).] Apparatus for the electrical reproduction of sound or picture records with the aid of light reflected from the surface 1 of the record comprises a reflector 12, curved in the form of a right parabolic prism, which directs on to a light - sensitive cell 10 the modulated light reflected from the record whether such light is regular as shown by rays A, B or scattered as shown by rays C, D. The space between the point of incidence of the beam of light from the source 5 and the cell 10 is substantially enclosed by the reflector, and the point of incidence is substantially on the focal line of the reflector. In the case of picture reproduction, the electrical impulses from the cell may be transmitted either by wires or wirelessly to a distance and there reconverted into images of the original picture.
Patent GB-645492-A (GB)
Title: Improvements in or relating to surgical appliances
IPC: A61B1/00
Filed: 1947-09-10
Abstract: 645,492. Surgical optical instruments. FOSSATI, R. Sept. 10, 1947, Nos. 24845 and 24846. Convention dates, May 4, 1946 and Sept. 27, 1946. [Class 81(ii)] A surgical appliance comprising a cannula which is introduced into the body by means of a trocar or perforator is characterized by a longitudinal slot in its wall so that an endoscope or similar optical device together with a surgical instrument can be simultaneously passed through the hole in the anatomical wall. In one form of the device a trocar 2, of substantially the same diameter as the cannula 1 is placed in the cannula as shown and then inserted through the anatomical wall. The trocar is then withdrawn, leaving the cannula in position, into which a telescope may be inserted. A slot extending along one side of the cannula, at its outer end, is opened by means of a hinged flap 7 operated by a knob 8, thereby slightly stretching the hole in the wall, and any desired surgical instrument is introduced through a corresponding keyhole slot in the end plate 6. In modified forms the flap is not used but the instrument is introduced first and pressed into the narrow part of the keyhole slot, after which the telescope is inserted. More convenient separation of the instrument from the endoscope may be provided by having a pivoted lever between the two, Fig. 8, (not shown), or by having two concentric tubes, both slotted, which may be rotated relatively to each other after the instrument has been inserted; Figs. 6 and 7, (not shown).
Patent GB-1246347-A (GB)
Title: Improvements in or relating to polyamides
IPC: C08G69/34
Filed: 1969-05-15
Abstract: 1,246,347. Polyamides. COATES BROS. & CO. Ltd. 15 May, 1969 [27 May, 1968], No. 24888/69. Heading C3R. A polyamide resin is prepared by reacting (A) an acid mixture and (B) an amine mixture, where (A) comprises (a) a polymeric fat acid and (b) R.COOH, where R is an aliphatic C 9 -C 20  hydrocarbon radical, and (B) comprises (c) a C 2 -C 4  alkylene diamine, and (d) a cyclic diamine selected from where A and A' are independently C 1 -C 4  alkyl groups, n and n' are independently 0-4, and R" is C 1 -C 4  alkylene group. (A) and (B) are in equivalent proportions or one may be in excess by up to 10%. (a) may be polymerized oleic, linoleic, or tall oil acid. (b) may be oleic or linoleic acid. (A) may contain, e.g., 5-20 equiv. per cent (b), or up to 20 wt. per cent (b). (d) may provide 5-50 amine equiv. per cent of the amine groups of (c) and (d). (c) may be ethylene diamine 1,2-diaminopropane, or 1,3- diaminopropane. Also present may be up to 10% of hydroxy acids, C 1 -C 4  aliphatic monobasic acids or low M.W. dicarboxylic acids; and up to 10% alkylene polyamines containing more than 2 amino groups. The reaction may be performed at 100-300‹ C. Vacuum may be applied, or an inert gas may be used. The reaction may be in one step, or in two steps, the first at 130-150‹ C. till by-product water distils off, the second step being then performed at higher temp. The polyamide may be dissolved in a C 2 -C 5  aliphatic alcohol, e.g. ethanol, npropanol, iso-propanol, or butanol. The solution may contain 25-50% wt. polyamide and up to 6% H 2 O. The composition may be used in flexographic inks.
Patent GB-1046615-A (GB)
Title: Improvements in and relating to fluid pressure operated electric switches
Inventor: BASSETT NORMAN EDGAR
IPC: H01H37/52
Filed: 1962-06-28
Abstract: 1,046,615. Fluid actuation of switches; thermal switches. AUTOMOTIVE PRODUCTS CO. Ltd. June 28, 1963 [June 28, 1962], No. 24907/62. Heading H2B. A combined fluid-pressure and thermal switch comprises contacts closed by increase in pressure in series with contacts closed by increase in temperature of the pressure fluid such that a signalling circuit is completed only upon coincident rises in pressure and temperature. The device is particularly applicable to signalling the condition of an oil filter, for example, of a road vehicle engine wherein a pressure difference across the filter when the oil is cold is not significant but the same pressure difference when the oil is hot is required to signal a warning that the filter is clogged. In a first embodiment (Fig. 2, not shown) the switch comprises two body parts 3 and 4 held together by screws (Fig. 1, not shown) clamping a diaphragm 6 therebetween. Screws 2 secure the switch to the cover of a filter such that passages 9 and 10 allow oil from opposite sides of the filter to pass respectively to opposite sides of diaphragm 6. A bell-shaped contact 12 is carried by diaphragm 6, while another 13 is insulatingly secured to the part 4 by a rivet 14. A terminal tag 18 is connected via rivet 14 and a spring 19 to contact 12. A circular bimetallic element 20 is clamped between contact 13 and insulating washer 16 and has tongues 21 which move into contact with the inner wall of part 4 when the oil is hot, but isolate contact 13 when the oil is cold. Thus when oil pressure lifts diaphragm 6 to close contacts 12 and 13 a signalling circuit between the casing and tag 18 is not completed unless the oil temperature is such as to cause the element 20 to connect contact 13 to the casing. In a second embodiment (Fig. 5, not shown), the switch is built into the filter cover itself. Oil inlet 28 communicates with an annular passage 30 and passages 29 from the other side of the filter connect with outlet 27. A ball 32 urged by spring 34 normally closes an opening between passages 30 and 27 but when lifted by oil pressure contacts the end of stud 35 which is mounted in insulation 36 and carries a bimetallic strip 38. When the oil is hot strip 38 engages contact 40 and a circuit between tag 45 and the casing can be completed by ball 32.
Patent GB-1213451-A (GB)
Title: Rotary vane-type fluid pumps, motors and impellers
Inventor: HENDERSON JAMES
IPC: F01C21/08
Filed: 1966-12-01
Abstract: 1,213,451. Wholly immersed propellers. J. HENDERSON. 20 Nov., 1967 [1 Dec., 1966], No. 24932/66. Heading B7G. [Also in Division F1] A variable-pitch steering or propulsion propeller for marine use, comprises totally immersed hollow vanes 41a, 41b, 41c, 41d, Figs. 4, 5, supported at their lower ends in stub shafts 42 and at their upper ends in control shafts 44 bearingly supported in a control rotor 46 which is driven through spur gearing 51, 52 and bevel reduction gearing 54 by a shaft 53. The upper ends of shafts 44 carry levers 59 which in turn carry control pins 60 engaged in slide-blocks 61 slidable in slideways 62 in a control rotor 63 supported on a shaft 26 carried by a slide-block 28 whose position is adjustable in a slide way 29 to adjust the shaft axis 26 with respect to the axis of a fluted shaft 55 against which the vanes abut so that as the vanes rotate they also move angularly towards and away from each other.
Patent GB-794597-A (GB)
Title: Preparation of dithiophosphate esters
IPC: C23F11/167
Filed: 1955-08-31
Abstract: 794,597. Dithiophosphate esters. AMERICAN CYANAMID CO. Aug. 31, 1955 [Sept. 8, 1954], No. 24978/55. Class 2 (3). Dithiophosphates having the general formula (including isomeric forms) in which R 1  and R 2  are aliphatic or aromatic hydrocarbon radicals, are obtained by reacting phosphorus pentasulphide, methyl alcohol, and an unsaturated ester of the formula CH(COOR 1 ) : CH.COOR 2  (including isomeric forms) and maintaining the reaction mixture at from about 20‹ to 100‹ C., preferably 65‹ to 85‹ C., until reaction substantially ceases. Specified hydrocarbon radicals are methyl, ethyl, n-propyl, isopropyl, n.- butyl, sec.-butyl, sec.-amyl, n-hexyl, 2-ethylhexyl, n-octyl, n-decyl, n-dodecyl, oleyl, cetyl, allyl, cyclohexyl, phenyl, and naphthyl. The starting materials may be reacted together in any order, e.g. all three may be mixed together and reacted simultaneously but it is preferred either to slurry phosphorus pentasulphide in the unsaturated ester and then add methanol or to admix methanol and the unsaturated ester and then introduce phosphorus pentasulphide into the mixture. The reaction can be conducted batchwise or continuously. The reaction involves four mols. of methanol, one mol. of phosphorus pentasulphide, and two mols. of unsaturated ester to yield two mols. of the dithiophosphate ester. An excess of methanol, e.g. up to 4.5 mols, and a lesser quantity of unsaturated ester, e.g. as low as 1.5 mol. per mol. of phosphorus pentasulphide are, however, suitably employed. Examples are given for the production of (1) S - (1,2 - dicarboethoxyethyl) - O,O-dimethyl dithiophosphate by a batch and continuous process using dimethyl maleate; (2) S - (1,2 - dicarbomethoxyethyl) - O,O - dimethyl dithiophosphate by a batch process using dimethyl maleate; and (3) S-(1,2-dicarbophenoxyethyl) - O,O - dimethyl dithiophosphate by a batch process using diphenyl fumarate. The products are stated to be useful in the formulation of insecticides, fungicides, plasticisers, corrosion inhibitors, flotation agents and petroleum additives. Specification 699,522 is referred to.
Patent GB-281433-A (GB)
Title: Improved apparatus for generating and discharging foam for fire-extinguishing purposes
IPC: A62C5/00
Filed: 1926-10-07
Abstract: 281,433. Jensen, C. A., (Simonis, H. S.). Oct. 7, 1926. Fire-extinguishing by foam.- Apparatus for generating foam comprises a receptacle for foam producing powder, a tank in which the powder is mixed with water, and a combined hydraulicmotor and pump by which the foam and waterare taken up, further mixed, and delivered to the place of use. As shown, a combined turbine and pump a of the kind described in Specification 244,176, [Class 110 (i), Centrifugal and screw fans &c.], is mounted at one end of a tank 1, e and f being respectively the inlet and discharge connections for the turbine and pump. A powder hopper 6 is mounted at the other end of the tank above a sloping false bottom 2 and a water-spraying ring 4 supplied with water by a connection 3 from the turbine water-inlet e. The hopper outlet is controlled by a core or other valve 11. In use, the valve 11 is opened, and water is admitted to the. turbine and the spraying ring 4. The foam formed in the tank is drawn into the pump by way of the strainer c, is thoroughly mixed in the pump, and is discharged by the outlet f. The apparatus may be mounted on wheels.
Patent GB-795378-A (GB)
Title: Polyepoxide compositions and process of hardening them
IPC: F16H33/08
Filed: 1954-08-27
Abstract: Polyglycidyl ethers formed by condensing a polyhydric alcohol or phenol with epihalogenhydrin in an alkaline medium are hardened with the aid of a mixture of polycarboxylic acid anhydrides at least one of which melts above 100 DEG  C.  Preferably the mixture contains low and high-melting anhydrides.  Eutectic mixtures may be used. High-melting anhydrides mentioned are phthalic, tetrachlorophthalic, hexachloro endo-methylene tetrahydrophthalic, succinic, pyromellitic, and mellitic anhydride and maleic anhydride-diene adducts. Polyglycidyl ethers specified are those prepared from 4,41-dihydroxydiphenyldimethylmethane or from a dihydroxy-dicresyl-dimethyl methane.  Known pigments or fillers may be included in the compositions.  In examples, the following hardening mixtures are employed: (1) and (2) phthalic anhydride and cis- D 4-tetrahydrophthalic anhydride; (3) and (6) phthalic anhydride, cis - D 4 - tetrahydrophthalic anhydride and cis - hexahydrophthalic anhydride; (4) phthalic anhydride and tetrachlorophthalic anhydride; (5) phthalic anhydride, cis-D 4-tetrahydrophthalic anhydride and succinic anhydride (6).  The compositions remain usable for long times and this time may be further extended by mixing fresh batches of composition with composition which has been standing for some time.  Specifications 518,057, [Group IV], and 744,388 are referred to.
Patent GB-482038-A (GB)
Title: Improvements in means for supplying secondary air and steam to boiler furnaces
IPC: F23L9/00
Filed: 1937-09-16
Abstract: 482,038. Blast apparatus. KANCLERZ, F. Sept. 16, 1937, No. 25166. [Class 51 (i)] A nozzle 1 through which steam is injected to entrain air for delivery over a furnace grate is divided by a partition 2 into compartments 3, 4, the outer end of the nozzle being stepped to provide walls 5, 6 at right-angles having apertures 8, 7, through which steam and air are delivered from the compartments 4, 3. Steam may be supplied to either compartment to entrain air through the other. As shown steam is supplied to the compartment 3 through a pipe 14 arranged within a cylindrical chamber 9 communicating with the compartment 4 and supplied with air at its outer end through a perforated plate 10. In a modification (not shown) the outlet orifices of the two compartments are arranged further away from the line of intersection of the walls 5, 6.
Patent GB-155681-A (GB)
Title: Improvements relating to driving gear for motor cycle and like vehicles
IPC: B62M25/00
Filed: 1919-10-14
Abstract: 155,681. Baker, F. E., and Biggs, T. J. Oct. 14, 1919. Controlling variable-speed gearing; clutches.-Variable-speed gearing for motor-cycles &c. is controlled by a sliding spiral rack which is divided into two parts a, a' Fig. 3, which are relatively turnable to adjust friction clutches for wear. The clutches have expanding segments c, Fig. 2, operated through screws e frcm pinions b meshing with the rack. In making an adjustment, one of the rack parts is turned a complete revolution relatively to the other, the pinions b, b<1> of two clutches being relatively displaced. Incomplete adjustment and accidental rotation are prevented by spring plungers d engaging flats g, Fig. 1, on the rack parts, which are held in position by a through bolt or rod f.
Patent GB-462599-A (GB)
Title: Improvements in the treatment of textile materials
IPC: D06M15/423
Filed: 1935-09-11
Abstract: The resistance of textile materials to creasing and crushing is improved by forming in the materials a water-insoluble resinous reaction product of an aldehyde with hydroxylamine, hydrazine or a substitution product of hydroxylamine or hydrazine in which the substituent comprises a hydrocarbon residue or an acidyl group of the formula R.CO.-- where R is a hydrocarbon residue.  The reaction may be effected by heating the textile materials carrying the reagents for a few minutes.  A catalyst such as hydrochloric acid or other mineral acid or an organic acid may be present.  Radicles which may be substituted for hydrogen in the hydroxylamine or hydrazine are methyl, ethyl, propyl, butyl, or radicles of alcohols obtained by reduction of higher fatty acids such as those of lauryl, oleyl, stearyl, and palmityl alcohols, or phenyl, tolyl, xylyl, cyclohexyl, or benzyl, or acidyl radicles such as acetyl, propionyl, lauryl, stearyl, palmityl, oleyl, and benzoyl.  The catalyst may be added with the base as is the case when hydroxylamine hydrochloride is used.  The reagents may be added in succession, with drying after each application. Impregnation may take place under vacuum or with increased pressure.  Excess of reagent may be pressed out by calender rolls. Cotton, linen, regenerated cellulose materials, cellulose acetate and other cellulose ester materials, and animal fibre materials may be treated.  Cellulose ester materials may be subjected to partial or complete saponification prior to the non-crease treatment.  Cellulose ester materials may be subjected to swelling prior to the treatment.  Artificial textiles may be stretched before the non-creasing process.  In an example, viscose fabric is soaked in a dilute solution of hydroxylamine hydrochloride.  It is then dried, dipped in an aqueous solution of formaldehyde, dried, and heated to 130 DEG  C. or higher for some minutes.  In another example, viscose fabric is soaked in hydrazine sulphate, dried, dipped into formaldehyde solution, dried, and heated at 130 DEG  C. for some minutes.  Acetaldehyde, glyoxal, paraform, or other aldehydes may be used instead of formaldehyde. Specifications 438,584, 438,585, 438,586, and 438,587 are referred to.
Patent GB-267030-A (GB)
Title: Improvements in folding hood fittings for vehicles
IPC: B60J7/12
Filed: 1926-10-12
Abstract: 267,030. Bunn, C. W. Oct. 12, 1926. Hoods.-In hoods of the kind in which the pillar is attached to the cant-rail by two links one of which is usually substantially horizontal and the other is extended rearwardly to connect to a back stay, the horizontal link is cranked or bent to prevent injury to the hood fabric caused by shearing action. The link 20 is cranked as shown and attached to housing carried respectively by the pillar and cant-rail. Such housings comprise pairs of plates spaced by distance-pieces 13, 14 and 29, 30 respectively, the distance pieces being formed so that the links 18. 20 may lie side by side. The link 18 is provided with a rearward extension 32 pivoted to a back stay 6 provided with a spring 7 abutting against an eye 8 on a pivoted arm 9. In the form shown in Fig. 4, the spring is dispensed with and the housing for the pillar is not connected to the pillar attachment plate except through the back stay 34. Specification 247,704 is referred to.
Patent GB-1013360-A (GB)
Title: Method of and tool for compressing a workpiece
IPC: B30B1/00
Filed: 1964-06-19
Abstract: 1,013,360. Jointing by stamping. AMP Inc. June 19, 1964 [June 21, 1963], No. 25388/64. Heading B3Q. [Also in Division F3] A method of compressing a workpiece comprises vaporizing an electrical conductor 52 by an electric current, and utilizing the energy thus generated to compress the work. As applied to a portable or (as shown), bench tool for crimping electrical connectors C on to conductors by a movable die 12, this is operated by a piston 22 in a polyethylene cartridge case 42. The filament 52, in an air or water-filled chamber, is connected between electrodes 50, 54 in the cartridge-head 46 and a polyethylene plug 58. The electrode 50 bears on an insulated disc 38 contacting the central conductor 34 of a socket, the outer conductor 28 of which is connected, through sleeves 18, 26 and the piston 22, to the electrode 54. A plug 64 connects the filament to a pulse-forming network through which a condenser is discharged to vaporize the filament and drive the plug 58 and piston 22. The tool may be modified to drive a wedge into a cable clamp to receive a cable or cables, as described in Specification 959,884.
Patent GB-1030941-A (GB)
Title: Circuit arrangement for varying the level of a signal
IPC: H04N5/20
Filed: 1964-06-19
Abstract: 1,030,941. Gain-control circuits. FERNSEH G.m.b.H. June 19, 1964 [June 20, 1963], No. 25442/64. Headings H3T and H4R. Gain control circuit comprises a bridge of voltage-dependent variable resistors, e.g. the diodes 14, 15, 16, 17 of Fig. 4, as a coupling network between two transistor amplifier stages. The impedance of the coupling network is varied so as to vary the gain of the circuit by varying the D.C. potential across the points 34 and 38 of the network. For an automatic gain control circuit the emitter-collector impedance of a transistor 55 may be connected across the bridge circuit so that the potential across the bridge varies with the potential applied to terminal 58. Alternatively, for a manual gain control the emitter-collector path of transistor 55 may be replaced by a variable resistor, Fig. 3 (not shown), or a variable resistor may be connected in series with the circuit between one of the terminals 34 or 38 and one pole of the supply, Fig. 1 (not shown).
Patent GB-1281543-A (GB)
Title: Improvements in, or relating to, door and like bolts
Inventor: DIAMOND SYDNEY JOSEPH
IPC: E05C1/04
Filed: 1969-05-20
Abstract: 1281543 Releasable fastenings S J DIAMOND (ENG) Ltd 20 Aug 1970 [20 May 1969] 25544/69 Heading E2A A bolt has a shoot 2 which is slidable in a bore 4 of a barrel 1 and is engageable with a keeper 3. Annular members 17, 18 and a spring 22a are mounted on the shoot 2, the annular member 17 being received in a transverse slot 8 formed in the barrel 1, the annular member 18 being received in a transverse slot 9 formed in the barrel 1, and the spring 22a being received in an annular recess 22 formed in the member 17. The shoot is provided with integral keys 13, the members 17 and 18 are each provided with a keyway 19, and the barrel 1 is provided with a keyway 5 so that, when the keyways 19 and 5 are in alignment, the shoot may be moved into the position shown in Fig. 2, by means of an operating handle 20 which is screwed into a screw-threaded hole 16 in the shoot 2. The annular members 17, 18 have equi-spaced lines 25' thereon, with identification symbols therebetween, and co-operate with equi-spaced lines 26 and symbols formed on the barrel 1 to allow a known combination to be applied when the alignment of the keyways is to be effected to allow the movement of the shoot into or out of the keeper 3. The members 17, 18 are recessed at 23, Fig. 3, so that when in alignment with recess 5 militate against inward movement of the shoot 2. Mounting holes 10, 11 and 12 are provided in the barrel 1 and mounting holes 10 and 24 are provided in the keeper 3, the holes 11, 12 and 24 being covered by the shoot when in the position shown in Fig. 2.