baber/WOPTO huggingface dataset:
Patent GB-651402-A (GB)
Title: Improvements in or relating to continuous feed cinematograph projectors
IPC: G03B41/10
Filed: 1947-08-15
Abstract: 651,402. Kinematograph projectors. GRAS, A. L. Aug. 15, 1947, No. 22683. Convention date, July 9, 1946. [Class 97 (i)] In a continuous feed projector having at least one oscillating reflecting surface for optical compensation the oscillation is effected by a cam and a lever in direct contact with the cam surface and pivoted about the oscillating axis of the reflecting surface, said lever in one position lying tangential to the cam and parallel to the axis of that lens of the lens components constituting the projection objective through which light enters. As shown, the compensating prism 7 is inserted, with a fixed prism 6, in the housing 2 between the projection lens elements 3, 4. The prism 7 is actuated by a lever 9 held, by a spring 11, in contact with a cam 12 driven off the gear train driving the film sprocket 15 and the shutter shaft 23. The shutter lies behind the projection aperture 1 and has a spiral slot which allows illumination of only one frame at a time. Frusto-conical and cylindrical shutters may also be used. Both prisms 6 and 7 may oscillate, being driven from levers engaging the cam 12 at diametrically opposite points. The film driving sprocket may be driven through worm gearing, the worm being axially adjustable for framing purposes. The prism 6 may be outside the objective lens housing with the lens 4 between the two prisms with its axis vertical.
Patent GB-1006468-A (GB)
Title: Improvements in or relating to lip seals and methods of manufacturing thereof
Inventor: TAYLOR KENNETH ROY
IPC: F16J15/32
Filed: 1963-06-07
Abstract: 1,006,468. Lip seals. SUPER OIL SEALS & GASKETS Ltd. July 31, 1964 [June 7, 1963], No. 22773/63. Addition to 950,600. Heading F2B. In a method of making a lip seal comprising a casing 10, 11, Fig. 7, carrying a sealing leather element 6, the opposite ends of a blank of leather are joined with an adhesive to form a cylindrical tube with a joint having substantially the same temperature/flexibility characteristics as the leather and a portion of the tube is cut off to provide a cylindrical ring from which the leather element is formed. The ends of the blank are chamfered to provide a scarf joint or they may overlap or abut each other. The adhesive, which is resistant to oil and greases, comprises a polyurethane rubber base with anhydrous ethyl acetate as solvent and a solution of an isocyanate in ethyl acetate as a curing agent. The outer surface of the tube which corresponds to the smooth surface of a leather hide is roughened by emery cloth wrapped round an abrading cylinder. After the ring has been cut off from the tube it is turned inside out and compressed in a heated die to a generally frusto-conical form with a stepped end edge portion 9, Fig. 5. The casing consists of sheetmetal ring members 10, 11 which are forced by a press member P into resting relation, Fig. 6, so that the edge portion 9 of the leather element becomes clamped between lipped portions 10a and 11a of the ring members which are maintained in this relation by a corrugated spacer ring 12 pressed down on to the member 11 by a disc 13 over the outer edge of which an edge portion 14 of member 10 is folded. A metal leaf spring, a rubber ring or, as shown, a garter spring 15 urges the free end of the leather element radially inwardly. In a modification, the leather ring is formed into an element and incorporated in a lip seal in the manner described in the parent Specification. In a further modification, instead of being formed with a stepped edge portion, the element is formed with a radially outwardly extending flange which is held clamped between ring members having no lipped portions.
Patent GB-755733-A (GB)
Title: Improvements relating to electrical remote-control switch apparatus
IPC: H01H3/58
Filed: 1953-08-19
Abstract: 755,733. Controllers; retractive switches. DAVIS & SON, DERBY, Ltd., J., and DAVIS, W. B. Aug. 18. 1954 [Aug. 19, 1953], No. 22812/53. Classes 38(3) and 38(5) A controller comprises an operating lever 14 pinned to a shaft to which a drum 20 is fixed, another drum 21 being rotatable upon the shaft. The drum 20 carries a cam for operating a leaf spring contact lever 23 in a main starting switch 24 whilst the drum 21 has adjustable cams for operating auxiliary running switches 33, 34, by means of spring contact levers 33a, 34a. In the "off" position of the controller, a spring-loaded push-rod 36 carried by the drum 21 is aligned with a plunger 27 in the drum 20 so that the drums are locked together until the movement imparted by a cam profile 29 disengages them. Thus, movement of the handle 14 to operate the switch 24 causes the two drums to move together, the drum 21 being released after the starting switch has closed. A spring 39 then drives the drum 21 in the reverse direction under the control of time delay mechanism 41, the push-rod 36 being held in its retracted position by a leaf spring member 46 until the drum has nearly completed its return movement whereupon a plate 47 actuates the member 46 to free the push-rod. Not until this has been achieved can the drum 21 be re-coupled with the operating shaft. When the drum has fully returned the running connections are completed, but overriding control is effected by the switch 24 which is actuated directly by the handle when the handle is returned to the "off" position. The shaft of the controller operates under a snap action derived from telescopically extensible plungers 15, 15a, extended by spring 17, the plunger 15a being fixed to the drum 20. The controller may be used in conjunction with motors driving conveyers which work in a dangerous atmosphere, the running contacts being placed in a pilot circuit designed to prevent sparking. These arrangements generally have a number of safeguards which normally may be rendered ineffective by holding the controller handle continuously in the "starting" position. The isolation of the manual control member from the associated switch mechanism in the pilot circuit after the starting operation has been completed prevents this faulty operation of the controller. Specification 600,524 [Group XXX]. is referred to.
Patent GB-793150-A (GB)
Title: 1, 2, 5, 6-diepoxycyclooctane and process for the preparation thereof
IPC: C08K5/1515
Filed: 1956-07-24
Abstract: The invention comprises the new compound 1,2,5,6-diepoxycyclo-octane of formula <FORM:0793150/IV (b)/1> It may be prepared by reacting 1,5-cyclooctadiene with peracetic acid between - 25 DEG  and 150 DEG C.  The reaction is preferably carried out by the addition of an excess amount of peracetic acid in solution in an inert organic volatile solvent, the solution being free from hydrogen peroxide, water or mineral acids, to the 1,5-cyclo-octadiene at a temperature in the range 0 DEG  to 45 DEG  C.  In the example 1,5-cyclooctadiene is treated with a solution of peracetic acid in ethyl acetate and the temperature is maintained at 35 DEG  C.; the reaction solution is added to ethylbenzene refluxing at reduced pressure in a still kettle and a low-boiling material is distilled from the head of the still at a temperature up to the boiling-point of ethyl benzene; the residue is fractionally distilled to give 1,2,5,6-diepoxycyclo-octane.ALSO:The invention comprises 1,2,5,6, - diepoxycyclo-octane, of formula <FORM:0793150/IV (a)/1> which may be used in the preparation of resinous products by reaction with difunctional organic compounds such as diamines, dialdehydes, dicarboxylic acids and diols.  The diepoxide may also be used as a stabilizer for vinyl chloride resins.
Patent GB-205627-A (GB)
Title: Improvements in and relating to alternating current dynamo electric machines
IPC: H02K19/26
Filed: 1922-08-22
Abstract: 205,627. Hunt, L. J., and Sandycroft, Ltd. Aug. 22, 1922. Exciting; dynamos, regulating.-In a selfsynchronizing generator of the single-field cascade machine type, the alternating-current winding consists of two star groups paralleled at corresponding terminals of their limbs and connected in series or parallel with the continuous-current exciting winding to the excitation source. In. the stator winding shown in Fig. 1, the alternating- current winding A comprises the star groups a, b, c, a<1>, b<1>, c<1> paralleled at 1, 2, 3 and giving an alternating supply at 4, 5, 6. The continuouscurrent exciting winding consists of two groups B, C, each containing two paralleled star systems and connected in series with each other, the winding A and the exciter 13 through the neutral points 9, 10, 12, 11, 7, 8. The units A, B and C are similar and of the type described in Specification 24838/14, and if corresponding conductors of each unit are placed side by side in the slots so that there is no alternating potential difference between them, they may be formed into single coils. The voltage induced in the unit C by rotation of the main field may be reduced by dividing the star limbs into coils I - - IV and V - - VIII and connecting the coils in series in pairs, such as coils IV and VIII, in which ,the voltages are in opposition so that the maximum voltage on the winding is that of one coil. In the form shown in Fig. 5, the continuous-current exciter 13 is connected in parallel with the exciting groups B, C and the alternating-current group A. Reactances 16 may be used in the alternating-current leads at the moment of paralleling, these being subsequently short-circuited, as by means of switches 20. In an alternative form, the continuous-current winding is of independent distributed form with no parallel branches and, together with the exciter, it is connected in series with the neutral points of the two star elements of the alternating-current winding. The rotor windings, which are preferably of the short-circuited cascade type, may be as shown in Figs. 1 and 20 to 24 of Specification 204,843. The Provisional Specification states that the rotor windings may also be as shown in Fig. 16 of Specification 16170/09, with or without a reduction of the continuous-current excitation by re-arrangement of the conductors so as to give one coil in each mesh element and two in each star element instead of two in each mesh and one in each star element, or by employing triplicate bars in the coils of a one-coil mesh element.
Patent GB-1301990-A (GB)
IPC: C08G18/42
Filed: 1971-04-19
Abstract: 1301990 Esters CIBA-GEIGY AG 19 April 1971 [5 March 1970 21 Jan 1971] 22866/71 Heading C2C [Also in Division C3] Tri- and tetra-hydroxy esters are prepared by reacting trimellitic or pyromellitic anhydride, an epoxy compound and optionally a dihydric alcohol. Examples relate to the preparation of trihydroxyesters by reacting trimellitic anhydride with (a) propane diol and cyclohexene oxide; (b) propane diol and cresyl glycidyl ether; and (c) cyclohexene oxide; (d) cresyl glycidyl ether. A tetra-hydroxyester is prepared from pyromellitic anhydride, propane-1,2- diol and cyclohexene oxide, it has the formula
Patent GB-240815-A (GB)
Title: Improvements in or relating to stencil hand stamps
IPC: B41K1/32
Filed: 1925-09-14
Abstract: 240,815. Mason, W. P. Oct. 2. 1924, [Convention date]. Stencilling; hand-stamps; inking-apparatus. - A stencil hand-stamp, of the kind described in Specification 187,495, comprises an inner main frame having side walls 10, 11, Fig. 4, and end walls 12 which are turned over to form guides 24 for a cover plate. Inwardly directed flanges 13 are provided to support a perforated diaphragm 14, Fig. 3, which is bent into upstanding walls 15 and provided with curved lateral flanges 16 adapted to clamp an inking-pad between them and similarly shaped corrugations 17 formed in the side flanges 13. The ink pad consists of an inner layer 18 of felt, an outer one 19 of fine meshed cloth, and a pad 20 enclosed between the two, the whole being stitched together. Fitting round the main frame is a stencil frame 33, Fig. 1, provided with internal flanges to fit under the flanges 13 and formed with corrugations 36, Fig. 3, similar to the corrugations 17, between which flanges the stencil is clamped, rubber strips carried by the under side of the flanges 13 serving to grip the stencil. Latches 38 on the stencil frame serve to hold it in engagement with the main frame, together with tongues on the stencil frame which are passed through slots 32 in the main frame and bent to form hinges. The cover 25, carrying a handle 41. is passed under the guides 24 and secured by latches 28, Fig. 1, engaging projections 26 on the wall 10 of the main frame.
Patent GB-189847-A (GB)
Title: An incandescent electric lamp
IPC: H01K1/34
Filed: 1921-08-29
Abstract: 189,847. Nishomoto, K. Aug. 29, 1921. Bulbs. - Metal-filament gas-filled lamps of the kind provided with double walls 1. 2, the space enclosed thereby being evacuated, are provided with filaments made by the process described in Specification 7829/15. Reference has b e e n directed by the Comptroller to Specifications 24029/13 and 143,676.
Patent GB-925292-A (GB)
Title: Improvements relating to sealing rings for shafts
Inventor: PRINGLE JAMES MAITLAND
IPC: F16J15/32
Filed: 1959-07-03
Abstract: 925,292. Stuffing-box substitutes. BURTONWOOD ENGINEERING CO. Ltd. April 11, 1960 [July 3, 1959], No. 22925/59. Class 122 (5). A shaft seal comprises a rubber &c. ring 1 formed on one periphery with a sealing lip 2 to engage the shaft or its housing and resiliently detachably engaged at its other periphery with a retaining ring or rings 6 adapted to be mounted in the housing or on the shaft. The rings 6 are a pair of L-section rings welded back-toback to form a T-section ring whose stem 7 engages a groove 3 in the ring 1, the groove 3 being in the inner periphery for an external seal, Fig. 1, or in the external periphery for an internal seal. In a modification, Fig. 4, the ring 1 is fitted between two split spring rings 15, the mating faces of the rings 1 and 15 being tapered. In a further modification, Fig. 5, the rubber ring 1 has a dovetail portion engaged in a corresponding channel in a split-ring 17. Relative rotation between the ring 1 and the rings 6, 15 or 17 may be prevented by lugs on one engaging notches on the other. To assemble the seal, the retaining rings 6, 15 or 17 are first sprung on the shaft or into the housing and may be additionally held in position by welding or by screws and the rubber ring is then sprung into its operative position. The rubber ring may be reinforced by metal, plastic or fabric and may include a slow-acting swelling agent which under the influence of lubricant and/or by an ageing process causes the rubber to swell slightly.
Patent GB-1043409-A (GB)
Title: Improvements relating to controlled rectifier circuit arrangements
Inventor: KING KENNETH GORDON
IPC: H02M1/00
Filed: 1963-06-10
Abstract: 1,043,409. Semi-conductor rectifier circuits. WESTINGHOUSE BRAKE & SIGNAL CO. Ltd. May 28, 1964 [June 10, 1963], No. 22990/63. Heading H3T. A capacitor-inductor circuit is coupled to the output circuit and to the gate circuit of a semi-conductor controlled rectifier to supply a reverse bias to the gate electrode when a rising voltage occurs on the supply line so as to prevent false firing of the rectifier. In Fig. 1 supply voltage surges are transmitted to the gate in reverse polarity through a capacitor C1 and a transformer, the secondary of which may be in parallel with the gate circuit as shown or in series with it (Fig. 2, not shown). When rectifiers are connected in series the transformer may have a single primary winding separate secondaries for the different-rectifiers (Fig. 4, not shown). In an alternative circuit (Fig. 3, not shown) the capacitor is connected across the rectifier and an inductor is connected in the common part of the gate and output circuits.
Patent GB-1216014-A (GB)
Title: Balance wheel motor for a timepiece
IPC: G04C3/06
Filed: 1968-05-15
Abstract: 1,216,014. Electric timepieces. CITIZEN WATCH CO. Ltd. May 15, 1968 [May 15, 1967], No.23008/68. Heading G3T. A timepiece balance wheel comprises eight permanent magnets mounted on the balance wheel and two stationary coils 13, 14 which co-operate electromagnetically with the magnets. Four magnets, two of which 9, 12 are shown, are  mounted on a disc 4 of the balance wheel and four magnets, two of which 5, 6 are shown, are mounted on the balance wheel disc 3. The coils are connected to an astable multivibrator circuit so that a driving pulse for maintaining the oscillation of the balance wheel is fed to the coils at each half oscillation of the balance wheel. A hair spring R is connected to the balance wheel shaft 1 and the rotation of the balance wheel is transmitted by an impulse pin 17 to an escape wheel 18. A pinion 19 drives a conventional gear train. The discs 3, 4 are made of pure iron and form paths for the flux between opposed pairs of the magnets. The symmetrical arrangement of the magnets eliminates the disturbing effects of external magnetic fields.
Patent GB-1456163-A (GB)
Title: Ultrasonic film splicer
IPC: B29C53/00
Filed: 1974-05-23
Abstract: 1456163 Ultrasonic seaming METRO KALVAR CORP 23 May 1974 [23 May 1973] 23168/74 Heading B5K [Also in Divisions G2-G3] A photographic film splicer comprises an ultrasonic transducer horn 90 having a stationary narrow elongated tip portion 130 and an anvil in the form of a rotatably mounted circular member 114 which rolls over the said tip portion and defines with it a narrow compression zone in which the splicing is effected. As shown, the film strips to be spliced are positioned in respective film block subassemblies 40, 41 (Fig. 1), the left hand subassembly 41 being shown in more detail in Fig. 3. It comprises a block member 46 and a cover member 55, both pivotally mounted on a hinge pin 45 carried by a hinge block 42. The hinge pin passes through bored shoulders 47, 48 of block 46 and a bored shoulder 56 of cover 55. Block 46 has a cut-out slot 53 in which one film strip is positioned, after which the cover 55 is closed and locked shut to clamp the film strip in position. The film end is now trimmed by a cutter assembly 12, which comprises a fixed member 80 and a movable cutter blade 81, which pivots downwards with a guillotine action. The whole subassembly 41 is then pivoted clockwise (Fig. 1) into the splicing position, and the other film strip end in subassembly 40 is similarly treated. A cam 70 is attached to the shoulder 48 of block 46, and another cam 72 is attached to hinge block 42. Thus as subassembly block 41 pivots clockwise the co-action of one cam against the other causes the block to move to the right. Similarly when block 40 is pivoted, it is caused to move to the left. Consequently the two trimmed film ends are moved towards each other, and so overlap slightly. In this position, the overlapping film ends now lie on the narrow elongated tip portion 130 of the fixed part 90 of the horn. The movable anvil subassembly 91, seen in Fig. 1 and in more detail in Fig. 4, comprises an L-shaped block 92 which is guided for sliding movement by rods 93, 94, and is driven by a rack 121 which engages with a motor-driven pinion (123, Fig. 2, not shown). Within the overhanging portion 109 of block 92 is positioned an anvil arm 108, pivoted on a dowel pin 111 which passes through an aperture 113 in the anvil arm. The rolling anvil itself is a wheel 114 carried at one end of the arm. When the film ends are located in position and ready for welding, the assembly 92 is moved forward, so that the film ends are compressed between the rolling anvil 114 and the narrow tip 130. On the return movement of the anvil the ultrasonic generator is energized, and the actual welding operation takes place to produce the splice. The whole sequence is controlled generally by the circuit of Fig. 5 (not shown), and provision is made for modifying the apparatus for accommodating film strips of different widths.
Patent GB-674761-A (GB)
Title: Photographic contact printing apparatus
Inventor: EASTER JOHN WILLIAM
IPC: G03B27/22
Filed: 1949-09-08
Abstract: 674,761. Photographic contact-printingapparatus. OZALID CO., Ltd. Nov. 7, 1950 [Sept. 8, 1949], No. 23289/49. Class 98 (ii). An apparatus having a stationary bend or a rotatable cylinder, usually of glass, with an inner light source and an outer traversing means, such as endless tapes, to convey copy material for exposure, is provided with cooling means comprising a tubular duct located on the inside of the bend or cylinder and having air-intake apertures spaced apart in the length of the duct and presented towards the concave surface of the bend, a second tubular duct located on the outside of the bend and having air-intake apertures spaced apart in the length of the bend and presented towards the convex surface of the bend, and a suction device communicating with the interior of the two ducts. Both ducts may extend longitudinally parallel with the cylinder and the inner one may be of approximately D-shaped cross-section having a front wall close to and concentric with the cylinder and a rear wall constituting a reflector. As shown, glass cylinder 10 open at both ends is carried in floating suspension by idler rollers 11, 12 and endless bands 13 rotatable over rollers 14, 15, 16 and 17; copy material is introduced at 18, exposed by mercury vapour lamp 21 which is surrounded and protected by light-filter envelope 22 and which may have end supports 23 as of Specification 662,994, [Group XXXVI], and discharged at 19. Internal duct 24 has openings 34 in its front plate 26 presented to the cylinder 10 and has reflecting back-plate 27, external duct 25 below the cylinder has apertures 36; and both ducts are sealed at one end of the apparatus and connected at the other end to an exhaust fan (not shown).
Patent GB-661521-A (GB)
Title: Improvements in or relating to aerials
Inventor: TAYLOR ERIC ARTHUR
IPC: H01Q9/08
Filed: 1949-09-08
Abstract: 661,521. Aerials. BELLING & LEE, Ltd. April 19, 1950 [Sept. 8, 1949], No. 23297/49. Class 40 (vii). A half-wave dipole for use in television reception comprises two flexible elements 17, 18, each comprising a pair of conductors spaced uniformly by a web of insulating material, and an insulating mount 10 which receives one end of each element and a coaxial cable 14 which is connected to the receiver. Due to the use of a pair of conductors in each element, the bandwidth of the aerial is greater than that of an aerial wherein the elements are composed of single wires. The mount 10 is a two-part moulding, the two parts being identical; Fig. 2 shows the mount with one part removed. A hole 29 passes through the mount for receiving a fixing screw. End-caps 25, 26 of insulating material are moulded on to the outer ends of the elements 17, 18. The aerial may be mounted in a room as shown in Fig. 4, the elements being secured by tacks 33 driven through the insulating web. Fig. 5 shows an alternative mounting in a loft providing an inverted V-aerial. In the arrangement of Fig. 4 the element connected to the central conductor of the coaxial cable is preferably placed in the upper position; this conductor is consequently identified by a coloured spot plated on the end-cap 25.