baber/WOPTO huggingface dataset:
Patent GB-673347-A (GB)
Title: Improvements in optical projectors
IPC: G03B21/06
Filed: 1950-11-06
Abstract: 673,347. Optical-projection apparatus. KELLOGG FOUNDATION, W. K. Nov. 6, 1950 [Aug. 3, 1950], No. 27030/50. Class 97 (i). The apparatus comprises a framework, a housing pivotally suspended from the framework, a transparent flat plate secured in the bottom of the housing for flattening an object, an image of which is to be projected, a light source in the housing spaced from the plate, and a lens in the housing to form an image of the object on a screen also in the housing. One form is shown in perspective in Fig. 1, and in longitudinal section taken at 4-4 of Fig. 1, in Fig. 4. The projector housing is pivoted at 16 to a yoke 14 pivoted, in turn, to a tubular supporting framework 10. Additional links 17, pivoted both to the projector housing and to the brackets 13 secured to the framework 10, ensure that the housing moves parallel to itself when raised by lifting the yoke 14. The weight of the projector housing is counterpoised by torsion springs in the casing 81. The table 21 for supporting the object is slidable on rollers along the framework 10. As shown in Fig. 4, the transparent panel 28 is mounted over an aperture 30 at the bottom of the housing. A carriage 33 supports lamps 34 and projection lens 45. The lens is in a screw-focusing mount which may be locked by a ring 47. It is surrounded by a shield 48. The carriage is movable along rails 31, 32 which extend across the casing to scan the object being projected. Two blinds are attached to the ends of the carriage and extend outwards and are wound on to rollers at the sides of the housing, one blind and roller being shown at 49a, 51a. A system of cords and pulleys rotates the drums in the same direction to wind one blind and unwind the other and pull the carriage 33 across the housing. This system is actuated by rotation of a drum 55 by an external handle 62. The projection light beam is reflected successively by mirrors 66 and 68 on to the screen 69. The latter has a diffusing surface formed on a Fresnel lens or to a member juxtaposed to a Fresnel lens.
Patent GB-519200-A (GB)
Title: Improvements in sliver plates for conducting delicate slivers of flax and like material
IPC: D01H5/72
Filed: 1938-09-17
Abstract: 519,200. Sliver guides. FAIRBAIRN LAWSON COMBE BARBOUR, Ltd., and ROSS, J. B. Sept. 17, 1938, No. 27130. [Class 120 (i)] A sliver plate for conducting four slivers to a pair of delivery rollers has three apertures, the two outermost slivers being pressed over the plate, down through an outer aperture and up through the central aperture where they pass, with the two innermost slivers, through a guide to the rollers. As shown the outer apertures a, a<1> in the plate 2 are triangular in shape with the edges f<1> engaged by the two outermost slivers f inclined at 45 degrees to the longitudinal direction of the plate and the length of the slivers. The edges of the aperture a, a<1> and of the central circular aperture b are beaded or polished to allow free movement of the slivers.
Patent GB-925727-A (GB)
Title: Production of copolymers
Inventor: KESSLER HANSJUERGEN
IPC: C08F222/20
Filed: 1961-07-27
Abstract: A process for the production of copolymers comprises polymerizing at a temperature of 50 DEG  to 150 DEG C. 1 to 50% by weight of a monomer of the general formula <FORM:0925727/IV(a)/1> in which R and R1 are hydrogen or methyl and R11 is an alkyl radical containing 1 to 4 carbon atoms or an alkyl ether radical of formula -(CH2)2-O-(CH2)n-CH3 where n is 1 to 3, with 99 to 50% by weight of another ethylenically unsaturated polymerizable compound.  The ether ester may be 1-acryloxy-1-ethoxyethane, 1-methacryloxy-1-ethoxyethane, 1-methacryloxy-1-butoxyethane, 1-acryloxy-1-isobutoxyethane, 1-methacryloxy-1-isobutoxyethane, 1-methacryloxy-1-[b -methoxyethoxy]-ethane, 1-acryloxy-1-[b -ethoxy-ethoxy]-ethane, 1-methacryloxy-1-methoxyethane, 1-crotonyloxy-1-ethoxyethane and 1-crotonyloxy-1-methoxy ethane. Many suitable comonomers are listed including the unsaturated carboxylic acids and their esters, amides, nitriles and anhydrides, unsaturated aldehydes and ketones, unsaturated alcohols and their esters and ethers, olefins and diolefins, vinyl aromatic hydrocarbons and halogenated derivatives thereof, vinyl and vinylidene chloride and vinyl heterocyclic compounds.  Polymerization may be effected in the presence of solvents and diluents, e.g. alcohols, ketones, ethers, amides, aromatics and heterocyclics; catalysts, e.g. organic peroxides and hydroperoxides and azo compounds; and chain transfer agents, e.g. mercaptans.  Examples describe the polymerization of 1-acryloxy-1-ethoxyethane with (1) butyl acrylate and styrene; (2) butyl acrylate and acrylamide; (3) vinyl propionate and (11) butyl acrylate; of (4) 1-methacryloxy-1-isobutoxyethane with vinyl propionate and methyl methacrylate; of (5) 1-methacryloxy-1-[b -methoxyethoxy]-ethane with methyl methacrylate and butyl acrylate; of (6) 1-crotonyloxy-1-methoxyethane with acrylic acid, ethyl acrylate and styrene; of (7) 1-methacryloxy-1-butoxyethane with t.-butyl acrylate and acrylonitrile; of (8) 1-acryloxy-1-[b -ethoxyethoxy]-ethane with N-butyl acrylamide, butyl acrylate and dimethyl itaconate; of (9) 1-methacryloxy-1-ethoxy ethane with N-butoxymethyl methacrylamide, dichlorostyrene and dibutyl fumarate; and of (10) 1-crotonyl-1-ethoxy ethane with butanediol monoacrylate, dibutyl maleate and styrene.  The copolymers may be dissolved in organic solvents, e.g. dioxane, toluene, cyclohexanone, butanol and butyl acetate, optionally together with urea-formaldehyde condensates, butanol etherified urea-formaldehyde condensates, melamineformaldehyde condensates, phenol-formaldehyde condensates, polyamides, aliphatic or aromatic epoxy resins, non-cross-linked reaction products of a dicarboxylic acid and pyrrole, and optionally curing catalysts such as phosphoric acid, and used for the production of films, lacquers, varnishes, coatings for wood and metals, for impregnating, textile finishes and pigment printing pastes, and cross-linked by heating.
Patent GB-290235-A (GB)
Title: Improvements in and relating to diaphragms for reproducing sound
IPC: H04R9/06
Filed: 1927-10-13
Abstract: 290,235. Electrical Research Products, Inc., (Assignees of Schlenker, V. A.). May 11, 1927, [Convention date]. Diaphragms; loud. speakers. - A directacting sound-radiator consists of a thin flat diaphragm 10, Fig. 2, tensioned to such a degree that the velocity of transverse waves therein is greater than one-fourth, and may equal the velocity of sound in air. For instance, a. circular sheet of aluminium-manganese alloy 29 inches in diameter and 0.002 metres thick may be clamped peripherally under a tension of 40 lb. per inch. The electrodynamic driving-unit 16 comprises a coil-wound ring 19, Figs. 4 and 5, cemented along the edges of a circular strip 30 of fabric to the face of the diaphragm. The ring vibrates between the annular pole-faces 20, 21, Fig. 5, of a permanent or electromagnet 22 having the tapered cross-section shown in Figs. 3 and 5. The driving unit 16 is fixed eccentrically on the diaphragm, and in order to damp out undesired vibrations reflected from the edge of the diaphragm an absorbing unit is fixed symmetrically on the other side of the central point to the unit 16, where the reflected waves come to a focus. The absorber unit may be identical with the unit 16, except that the ring windings are closed, or shunted by a resistance, so as to dissipate the induced currents. Or a porous or other buffer, or a suitable dash-pot, may be arranged to damp-out the undesired reflections. The optimum proportions between the dimensions of the diaphragm, and the mass and size of the driving coil 19, for various frequencyranges are set out in the Specification. The diaphragm as a whole is preferably inclined to the vertical when mounted in a cabinet, so that the walls of the latter project both back and front from the plane and act as a horn or baffle. Instead of being circular in shape the outline of the diaphragm may be elliptical or it may be formed by portions of four ellipses having a common focal point. In such cases the driving unit may be located at one focus, and the dissipating or absorbing unit for the reflected waves located at the conjugate focus.
Patent GB-449064-A (GB)
Title: New or improved device for producing musical sounds
IPC: G10F1/18
Filed: 1935-10-02
Abstract: 449,064. Stringed musical instruments. GODJEVATZ, V. V., 24, Uhlandstrasse, Charlottenburg, Berlin. Oct. 2, 1935, No. 27243. Convention date, July 31. [Class 88 (ii)] Each string 1 of a musical instrument of the violin type is provided with a rotating annular bow 2, which is pivotally moved into contact with its string by a key 10. The bow comprises cords 3 passing obliquely between siderings 14, 15, secured to each wheel 2, and each string 1 passes obliquely through the centre of its wheel. In Fig. 5 (not shown), the rings 14, 15 are independently spaced apart and the string, which lies in the central plane of the wheel, passes between the rings, below or above the intersection of the cords. The cords are tensioned by helical springs 19 arranged between lugs on the rings 14, 15 and on the wheel 2. Alternatively, parts of the cords may be of helical formation. The wheels 2 are pivoted, for movement towards or away from the strings, on the shaft 13 of toothed idlers 11, drivingly connecting the wheels with a shaft 12, driven through flexible shafting by an electro-motor. The bow-keys 10 also lift dampers 22 from the strings. Rosin is carried on the ends of a comb, Fig. 6, adapted to wipe the cords 3. The bow-carrying structure 7 is slidably mounted on a framework 25 which, in the case of a violin, is secured to the fingerboard and button. The speed of the bows may be varied by a regulator controlled by means arranged near the keys 10.
Patent GB-370339-A (GB)
Title: A new or improved machine for raising or mixing sand, grit, chippings and other granular or finely divided materials
IPC: E02F3/04
Filed: 1931-10-01
Abstract: 370,339. Mixing-machines. COLEMAN, F., of Coleman & Sons, Ltd., Alfreton Road, Derby. Oct. 1, 1931, No. 27313. [Class 86.] A machine for loading or mixing granular or like material, applicable for raising liquids, comprises a wheeled frame a having a motor c geared to a chain wheel m carrying a crank arm o adapted to oscillate a shovel or scoop q suspended by a link s from a pin t. The scoop travels in an approximately elliptical path with a quick forward and upward movement and a slow return. The scoop dips into a pile of material wand loads it into a vehicle &c. Two or more scoops may be used.
Patent GB-1465636-A (GB)
Title: Electrical detector for attachment to the skin
IPC: A61B5/0408
Filed: 1974-06-20
Abstract: 1465636 Skin-contacting electrodes MEDICOR MUVEK 20 June 1974 [15 Oct 1973] 27360/74 Heading G1N [ Also in Divisions A5 and A6]  An electrical detector for fixing to the skin for biometrical observations comprises a silver electrically conducting electrode 6 and a coherent porous body 4 of silver grains having cohesive bonds 2 between contacting silver surfaces of said grains and cohesive bonds 14 between contacting surfaces of said grains and said electrode surface; and a coating of silver chloride on the surfaces of substantially all of said grains other than said contacting surfaces. The electrode is a housing defining a cavity and the grains are compressed in the housing to substantially fill the cavity and to form cohesive bonds between said grains and the inner surface of the housing. A flange of electrode 6 is joined to a plastics annulus 7 which annulus forms a seat for a porous plastics foam disc 5. A closed cell plastics foam disc 8 is gripped between metallic bell 12 and annulus 7, The skin-contacting surface of disc 8 is coated with biologically-harmless non-water-soluble adhesive 9. Disc 5 is coated in a gel containing Cl<SP>-</SP> ions. Before use adhesive 9 is covered by a multi-layer paper 10 with a silicone lining 11. The detector is wrapped in a hermetically sealed multilayer bag containing saturated water vapour.
Patent GB-362032-A (GB)
Title: Improvements in combination insoles and foot supports for boots and shoes
IPC: A43B7/14
Filed: 1931-06-06
Abstract: 362,032. Insoles. STEPHENS, I. T., 16, Richmond Street, Ashton-under-Lyne. June 6, 1931, No. 27367/30. [Class 17 (ii).] A foot-supporting sock comprises two plies A, A<1> of leather or othe r suitable material secured together at the heel or other position, the lower ply A<1> having perforations through which laces a of soft rubber, leather, or other material are passed to provide support in the required position, for example under the arch as shown, or to form cavities for the accommodation of corns and the like. The top ply may be made wider at the waist to form a flap under which a pad of soft rubber or other material may be inserted in addition to the lacing. The flap may be slit for insertion of a side arch support of stiff pigskin or similar material, secured to the underside of the flap, as by stitching or an adhesive. Additional support for a toe or toes is effected by using a double lace or an extra strip under the lacings. A full or half sock may be used.
Patent GB-809140-A (GB)
Title: Improved retractable ball point writing instrument and latching means therefor
Inventor: SAMS HERBERT WILLIAM
IPC: B43K24/02
Filed: 1956-09-06
Abstract: 809,140. Writing instruments. SCRIPTO Inc. Sept. 6, 1956, No. 27378/56. Class 146(3) Means for projecting a spring-retracted ball-point pen unit 10 to writing position comprises a plunger 30 engaging the inner end of the pen to move it forward, and a member 32 fixed to the plunger and having a lateral projection 68 which engages a two-limbed cam slot 64 in a member 46 fixed to a rotatable cap 28, the projection 68 sliding down the slot 64 and engaging a locking notch 66 when the pen is projected and being released for retraction of the pen by rotating the cap 28. The member 32 where it engages the plunger 30 is of split tubular formation and has an enlarged semi-cylindrical end 40 slidable in a similarly shaped recess 42 in a sleeve 24 fixed to the part 14 of a twopart barrel 12, 14 and is thus prevented from rotating. Opposite the recess 42 is a smaller semi-cylindrical recess 44 which accommodates the ink reservoir 18. The member 46 also is of split cylindrical shape where it fits into the rotatable cap, and the slot 64 is formed in a semi-cylindrical enlarged end 50 thereof, encircling the part 40 of the member 32.
Patent GB-298472-A (GB)
Title: Improvement in brake mechanism for automotive vehicles
IPC: B60T13/24
Filed: 1928-09-24
Abstract: 298,472. Bragg, C. S., and Kliesrath, V. W. Oct. 8, 1927, [Convention date]. Fluid-pressure; hand and foot actuation; forcetransmitting mechanism.-In a braking system for vehicles in which the brakes on the steering and the driving or other wheels are simultaneously applied by fluid pressure, the arrangement is such that the maximum pressure that can be applied by the brake piston is insufficient to lock the wheels on a dry track even with a light load and means are provided whereby the driver may apply additional pressure by direct effort to the brakes on the wheels other than the steering wheels. According to one arrangement, Fig. 1, the brakes on the four wheels of a motor vehicle are applied by the piston 3 through a floating lever 6 pivoted to the pull rods 8, 9 respectively connected to the rock shafts 76, 76a of the front and rear brakes. The arms of the lever 6 may as shown be such that greater pressure is applied to the rear than to the front brakes or the inverse arrangement of the pivots of the rods 8, 9 may be used so that the greater pressure is applied to the front wheels. One member of the control valve 10 for the cylinder 1 is connected to the pedal 88 and the other member to the rod 9 whereby after lost motion between the two members has been taken up, a direct effort may be applied by the pedal to the rear brakes. The valve mechanism may be of the kind described in Specification 267,478 comprising a casing 10, Fig. 3, connected by the rod 87 to the pedal 88 and a tubular valve rod 20 connected to the rod 9. The casing is connected by a pipe 65 to the induction pipe 62 of the engine of the vehicle and to the atmosphere by the orifice 12. Suction valves 40, 41 are slidably mounted on the rod 20 and can be engaged by collars thereon. Normally, the valve 41 is unseated as shown so that the cylinder is open to atmosphere by the pipe 66, rod 20, and orifices 27, 12. When the pedal is depressed to apply the brakes, the casing 10 is moved to seat and unseat the valves 41, 40 respectively, thus connecting the suction pipe 65, to the cylinder. If the pedal is held stationary in an intermediate position, the follow-up movement of the rod 20 effected by its connection to, the piston 3 causes both valves to be closed and the brakes may thus be partially applied. The casing 10 may also be engaged with a collar 28 on the rod 20 to enable the operator to apply a direct pressure to the rear brakes. The piston may be secured to the chassis and the cylinder be movable and be connected to the brakes A flexible diaphragm secured at its edge to the cylinder may be substituted for the piston 3. Compressed air or steam acting either against atmospheric pressure or vacuum may be used for actuating the piston or diaphragm and the vacuum used in the case of a steam driven vehicle may be that existing in the condenser.
Patent GB-240780-A (GB)
Title: Improvements in window regulators
IPC: E05F11/38
Filed: 1924-11-17
Abstract: 240,780. Dura Co., (Assignees of Nicholson, S. W.). Oct. 3, 1924, [Convention date]. Vehicle-window opening and closing apparatus. -A locking or holding device for a vehicle-window regulator of the kind comprising a handle and balanced operating lever, consists of an arm 19 rigidly connected to the operating lever 13 and provided with a rack 20 adapted to engage an arcshaped rack 10 fixed to the door frame. The arm 19 with the lever 13 and handle are axially movable against the spring 21 on the spindle 14, to free the teeth from the fixed rack. The rack is provided with a guard 29 riveted to the rack and mounting plate 8. The escutcheon plate 31 surrounding the handle shaft 24 has projections 33 engaged in an annular groove in the shaft.
Patent GB-448100-A (GB)
Title: A process for the manufacture of a synthetic balsam by condensation of phenols with aldehydes
IPC: C08G8/28
Filed: 1934-09-25
Abstract: A balsam-like condensation product of phenol and formaldehyde, which is capable on heat treatment of being converted into a hard infusible mass is prepared by condensing phenol with formaldehyde in the presence of an unsaturated aromatic acid and/or benzoic acid, and incorporating with the reaction product or the ingredients from which it is formed a polyhydric alcohol and/or a hydrogenated phenol.  The condensation is preferably carried out in the presence of a catalyst such as ammonia, and the acids referred to above preferably contain additions of other organic or mineral acids such as acetic acid and hydrochloric acid.  At the hardening stage the excess of acid assists in polymerization until neutralized by esterification with the polyalcohols.  The esters so formed serve as plasticizing agents. Other such agents which may be added are the glycerine esters of camphoric acid to assist the material to adhere to cellulose compounds, and the acetates of glycerine which decolourize the product.  Materials which may be added to the balsam like product are powdered sulphur to modify the dielectric properties and to make it suitable for use as an insulating material.  Light filtering materials such as fluorescein, halogenated fluoresceins, or salts of lead and manganese for use as colour filters.  Carbohydrates such as dextrin may be added when it is desired to make moulding powders. Additions such as this tend to increase the flexibility of the product.  Other filling materials mentioned are wood flour, cotton linters, silk or asbestos waste, luminous materials such as alkaline earth and zinc sulphides or radio-active materials, and rubber.  The balsam-like products of the present invention are capable of being hardened at atmospheric pressure at a temperature below 100 DEG  C. It is stated that the synthetic balsam has the same index of refraction as ordinary glass and it may be employed either as a synthetic glass or as an adhesive interlayer in the manufacture of safety glass.  In an example 250 grams of benzoic acid, 50 grams of cinnamic acid and 500 grams. of phenol are mixed and added to 500 grams. of formaldehyde containing 30 grams. of ammonia.  When the condensation product commences to form a mixture of acetic acid, cyclohexanol, glycerine and paracamphoric acid is added to furnish a flexible strong and transparent material.  If it is desired to produce an opaque material, 100 grams. of carbohydrate may be added.
Patent GB-739026-A (GB)
Title: Therapeutically valuable esters and methods and intermediates for obtaining the same
Filed: 1953-10-07
Abstract: The invention comprises (1) threo forms of compounds of the formula <FORM:0739026/IV (b)/1> (and their acid addition salts), R being an aliphatic hydrocarbon radical of 7-19 carbon atoms, and (2) the N-dichloracetylation of these to give esters of chloramphenicol (D-, L- and DL-forms). The compounds of (1) are made by reacting acid addition salts of threo-1-(p-nitrophenyl) - 2 - aminopropane - 1 : 3 - diol with acyl halides or acid anhydrides, preferably with acyl halides in a weakly basic anhydrous medium at 20-35 DEG  C., e.g. in dimethylformamide.  For N-dichloracetylation there may be used a dichloracetyl halide, dichloracetic anhydride, dichloracetic ester (especially methyl), N-acyl-dichloracetamide, chloral cyanhydrin or the components thereof.  Reaction conditions are specified for the various dichloracetylating agents.  In the examples: (1) the D-(-)-aminodiol is converted into its D-(+)-palmitic ester and D-(+)-chloramphenicol palmitate; (2) the D-(-)-aminodiol is acylated with stearyl chloride and the D-(+)-ester converted to D-(+)-chloramphenicol stearate; (3) the DL-aminodiol gives its palmitic ester and DL-chloramphenicol palmitate; (4) the D-(-)-aminodiol is converted to its D-(+)-lauric ester and D-(+)-chloramphenicol laurate; (5) the L-(+)-aminodiol is acylated with palmitoyl chloride and further N-dichloracetylated to yield L-(-)-chloramphenicol palmitate.  Reference has been directed by the Comptroller to Specification 701,997.
Patent GB-1056075-A (GB)
Title: Improvements in or relating to heat exchangers
IPC: F28F13/06
Filed: 1963-07-11
Abstract: 1,056,075. Making heat exchangers. ESCHER WYSS A.G. July 11, 19G3 [July 11, 19621, No. 27588/63. Heading B3A. [Also in Division F4] A double - walled heatconducting partition having two spaced - apart walls bridged by a corrugated strip, separates two fluids in heat exchange with one another, the cavity within the partition being formed by a space between two tubes of differing diameter located one within the other, and the strip being bonded at the corrugation crests thereof to the respective tubes. In a method of assembly a corrugated copper strip 2<SP>3</SP> is wound helically around an inner tube 2<SP>2</SP>, the corrugations being offset from turn to turn. This assembly is then inserted into an outer tube 2<SP>1</SP> and the inner tube is expanded to press the corrugation crests of the strip against the tubes. Soldering foil is wound around the inner tube before winding on the strip and wound around the strip after the latter has been wound on to the inner tube.