baber/WOPTO huggingface dataset:
Patent GB-709659-A (GB)
Title: Improvements in and relating to tele-objectives
IPC: G02B13/02
Filed: 1951-12-03
Abstract: 709,659. Optical objectives. VOIGTLANDER AKT.-GES. Dec. 3, 1951. [Dec. 6, 1950], No. 28285/51. Class 97(1) A telephoto objective has a back focal length less than half the equivalent focal length F and comprises a front convergent lens combination consisting of a bi-convex lens I and a negative lens II, separated by an air space equal to between 15 and 40 per cent of F from a dispersing lens combination consisting of a front bi-convex lens III and a negative lens IV having a dispersing front surface R7 concave towards the front, this surface having a refracting power between 2“ and 4¢ times the power of the complete objective. Preferably, the radius of surface R7 lies between 0.2 and 0.6 times the radius of surface R3, and between 0.25 and 0.75 times the distance a2+d3 +a3. Also, the distance d3+n3 may lie between 0.20 and 0.60 times the radius R7. The rear combination may include a cemented surface convex towards the front, this surface having a refracting power between 0.25 and 0.65 times the power of the complete objective and preferably being in the rear negative lens. Optical data are given for one example.
Patent GB-383716-A (GB)
Title: Improvements in telephone and like transmission systems
IPC: H04B1/58
Filed: 1931-10-12
Abstract: 383,716. Two-way transmission ; loading. TELEFONAKTIEBOLAGET L. M. ERICSSON, 33, Kungsgatan, Stockholm. Oct. 12, 1931, No. 28329. Convention date, Oct. 13, 1930. Addition to 369,984. [Class 40 (iv).] According to the parent Specification an 8-terminal impedance network comprises two component filters whose frequency-ranges are equal while their impedance characteristics are inverse, connected so as to have two arms in common. According to the present invention one of the filters comprises a loaded line, and the other comprises a loaded line or artificial line having an inverse impedance characteristic ; in this manner the two lines are reflectionlessly connected to an air-line or other circuit of constant impedance. In Fig. 1 an air-line L serves two loaded lines L1, L2 which terminate in amplifiers V1, V2, one for each direction of traffic. The air-line L has constant impedance and is balanced by a constant impedance B. The loaded line L1 is terminated mid-series, the end-line section S1 being complete (of length s) while the end coil P1 has half the inductance of the ordinary coils P. The line L2, on the other hand, is terminated midshunt, the end section S2 having a length ¢s which is half the length of the ordinary sections S. The product of the impedances of L1, L2 is constant at all frequencies. These lines are similarly terminated at each end. In a modification (Fig. 2, not shown) half of the section S1 is represented by lumped impedances, so that the coils of line L1 come opposite those of line L2, instead of being staggered as in Fig. 1. Moreover the pair of loaded lines L1, L2, without amplifiers, may serve to connect two land-lines ; traffic then passes both ways over lines L1, L2, and each of these is terminated mid-series at one end and mid-shunt at the other. The Specification shows that with this system the cross-sectional areas of the conductors may be halved and the loading doubled, the bulk of the quadcable being scarcely greater than that of the usual twin.
Patent GB-669152-A (GB)
Title: Electric dry shaver
IPC: B26B19/14
Filed: 1949-11-04
Abstract: 669,152. Dry shavers. SLUIJTEB, J. G. Nov. 4, 1949. [Dec. 21, 1948 ; March 16, 1949] Nos. 28342/49 and 28343/49. Class 131. A dry shaver comprises a rotary blade member and a stationary skin-engaging guard member, which are disk-like and dished to a conical form, concave to the surface to be shaved, and are provided with peripheral radial cutting teeth lying in planes generally parallel to the surface to be shaved and having their cutting edges inclined to each other, the blade member being pressed against the guard member by a spring reacting on a handle. As shown, the blade member 7 is rotated by gear teeth 6 and a bevel pinion 5 on a shaft 4, driven through a flexible connection 3, from the shaft 2 of an electric motor in the handle 1 and has a hub 8 fitting over a hub 9 of the guard 10. The hub 9 is secured by a screw 11, threaded into a sleeve 12, screwed into the handle and locked by the nut 13. The blade member is pressed on the guard by a cup 18 resting on a flat annular facing 19 and acted upon by a flat spring 20 apertured to encircle the hub 9 and having extensions pressing against the cup which is recessed to allow the passage of the bevel pinion. The axis of rotation of the blade member may be at.an obtuse angle to the longitudinal axis of the handle to facilitate shaving and the cutting edges may be protected by a ring 25 pivoted to the handle at 27.
Patent GB-603120-A (GB)
Title: Improvements in and relating to the combustion chambers of engines
IPC: F02B51/02
Filed: 1945-10-26
Abstract: 603,120. Pistons. TRINIDAD LEASEHOLDS, Ltd., HEATON, W. B., and HANSON, T. K. Oct. 26, 1945, Nos. 28373/45, 33039/45 and 12529/46. [Class 122 (i)] [Also in Group XXVII] In compression ignition engines, pistons are provided with one or more coatings or inserts of porous metal impregnated with vanadium pentoxide for promoting smooth combustion. The porous metal is preferably formed by powder - metallurgical or metal - spraying methods, and impregnated with a solution of a vanadium compound, preferably aqueous ammonium vanadate, which is converted to vanadium pentoxide on heating. In one embodiment of the invention a plug, consisting either wholly of sintered porous metal (e.g. nickel) or of a non-porous metal with a porous face, is inserted into the piston. When using the spraying process, a suitable porous surface may be provided by nickel chrome alloy sprayed from a pistol as described in Specification 432,831, [Group XXIX]. The impregnation with the solution of a vanadium compound and its subsequent conversion to the pentoxide may be carried out either before or after the application of the porous metal.
Patent GB-1504570-A (GB)
Title: Rectangular tray and blank therefor
IPC: B65D5/00
Filed: 1976-07-01
Abstract: 1504570 Cartons ASHTON CONTAINERS Ltd 1 July 1976 [4 July 1975] 28399/75 Heading B8P A carton of solid or corrugated fibreboard is folded from the blank of Fig. 1 and has stacking flanges 24 along two opposite ends. Portions 29 on flaps 25, 26 are glued to adjacent side walls and the carton top is cut to form flaps 16 which are folded inwardly to form double thickness sides and which carry tabs 19 engaged in slots 18 in the base 10. The top also forms locking flaps 22 which fold under the stacking flanges 24 and carry tabs 21 that engage cut-outs 20 at the top of end walls 11. To collapse an empty carton, flaps 16 and 22 are unfolded, the end walls 11 are pressed inwardly and side wall 13 is pressed down on to the base.
Patent GB-155973-A (GB)
Title: Improvements in shock-absorbing devices for the frames of motor-cycles
IPC: B62K25/20
Filed: 1919-11-18
Abstract: 155,973. Willoughby, N. D. Nov. 18, 1919. Spring devices.-In a spring suspension for the rear wheels of motor-cycles, a U-shaped frame a pivotally connected at c to the underside of the chain stays b has its open end a' pointing rearwards and constituting one arm of a lever carrying the wheel axle a<2>, shock-absorbing springs being provided between the chain stay or bottom bracket and the U-shaped frame in front of the pivot. Each pivot bearing for the frame a takes the form of a double adjustable ball bearing provided with dust caps and a lubricator k. The springs may be of the laminated type bolted to the frame a and shackled or movably connected (as by a pad or tension spring) to the bracket h; or, as shown in Fig. 3, the frame a may be fitted with a curved guide-rod l passing through an opening in the bracket and carrying main and rebound springs m, n and a. rubber block n<1>. Reference has been directed by the Comptroller to Specifications 29462/96, 15081/98, 10179/10, and 9540/15.
Patent GB-448604-A (GB)
Title: Improvements in electrically-driven hand tools or appliances
IPC: B25B21/00
Filed: 1935-10-16
Abstract: 448,604. Cooling motors. BOSCH AKT.-GES., R., 4, Militarstrasse, Stuttgart, Germany. Oct. 16, 1935, No. 28528. Convention date, Oct. 20. 1934. [Class 35] In a hand-toot, surch as a sheep-shearing machine, comprising a motor enclosed in a casing forming the handle of the tool the motor is cooled by air drawn in at the end of the casing next the tool through openings covered by a hollow perforated cap of such size that the hand is not likely to close all the perforations at once. The air-inlets 5, Fig. 2, are in the part of the casing 2 enclosing the gearing and the commutator 8, and the air passes in from over the commutator and between the stator and rotor and in part outside the being expelled by a fan 11 through openings 13. The openings 5 are covered by caps 14 shaped as shown in Fig. 3 and enclosing corrugated wire gauze 15.
Patent GB-205683-A (GB)
Title: Improvements in and relating to blocks for rubber roadways
IPC: E01C5/18
Filed: 1922-10-20
Abstract: 205,683. Morrison, A. S. Oct. 20, 1922. No Patent granted (Sealing fee not paid). Paving blocks.-Rubber paving blocks having the upper part of softer rubber than the base are made with two or more of the sides inclined inwardly and provided with projections and grooves which key with the tar, pitch, bitumen, or other binder when the blocks are forced down on the coated road. The projections and grooves of adjacent blocks may interlock.
Patent GB-780338-A (GB)
Title: Para-xylene production
IPC: C07C2/86
Filed: 1954-10-05
Abstract: Para-xylene is produced by condensing toluene with formaldehyde in the presence of a strong acid, e.g. sulphuric, methane sulphonic, phosphoric or hydrofluoric acid, and passing the so-formed ditolylmethane together with hydrogen, at 700-900 DEG  F. over a preparation comprising a Group VI (b), VII (b) or VIII metal or an oxide or sulphide of such a metal, e.g. over a molybdenum oxide-alumina preparation.  Mol. ratios of hydrogen to ditolylmethane may be from 1/1 to 40/1 , and the liquid hourly space velocity may be 0.2-2.5.  Hydrogen pressures above 25 at. are undesirable.  The product is distilled to recover toluene for reaction with more formaldehyde, to obtain a p-xylene and o-xylene mixture for fractional distillation, and to leave unconverted ditolylmethane for further hydrogenation.
Patent GB-651104-A (GB)
Title: A combined cigarette support and extinguishing device
IPC: A24F13/22
Filed: 1948-11-04
Abstract: 651,104. Cigarette rests. LEONG, C. H. Nov. 4, 1948, No. 28701. [Class 130] A cigarette support and extinguisher, which may be clipped or permanently secured to an ashtray, comprises a curved metal trough 1 and a pivoted flap 2. Insertion of a cigarette raises the flap 2, which may be weighted or spring-loaded and holds the cigarette in position. If the cigarette burns away until its lighted end reaches the end of the flap, the conduction of heat therefrom through the metal slowly extinguishes it. 'To facilitate extinguishing a cigarette, a projection 2c may be formed on the under side of the flap, and a finger button 4 provided for pressing the flap on to the lighted end. The flap may be provided with a tailpiece 2d which, on rotation of the flap by means of a knurled wheel 3a on its pivot, ejects the butt of an extinguished cigarette from the trough 1.
Patent GB-770064-A (GB)
Title: New or improved means for providing a demountable seal between concentric cylinders
Inventor: SMITH CHARLES DONALD
IPC: F16L39/00
Filed: 1954-10-06
Abstract: 770,064. Joint-making packing. FLAVEL & CO., Ltd., S. Sept. 14, 1955 [Oct. 6, 1954], No. 28752/54. Class 122 (3). [Also in Groups XIII and XXVIII] A packing assembly for two concentric cylinders, e.g. the glass outer cylinder a and the inner cylinder or flue b of a gas-fired storage water heater, comprises two rubber or like rings c, d clamped between the flared peripheral edges of two rigid annular members e, f, and urged into sealing contact with the respective cylinders when the members are drawn together. The members are formed from sheetmetal and drawn together by nuts h on screws g secured, as by welding or brazing, to the member e. Flanges j, k on the member f act as supports for the cylinders.
Patent GB-425015-A (GB)
Title: Improvements relating to spindle bearings
IPC: F16C35/10
Filed: 1934-10-08
Abstract: 425,015. Spindle bearings. CHURCHILL MACHINE TOOL CO., Ltd., Broadheath, near Manchester, and ASBRIDGE, H. H., Reigate, Moss Lane, Ashton-on-Mersey. Oct. 8, 1934, No. 28796. Addition to 410,961. [Class 12 (i)] In a spindle thrust or journal bearing according to the parent Specification, diaphragms d, i are arranged between the member or members, such as the pistons a, k loading the bearing members b, h, and the hydraulic fluid chambers e, j, these chambers being detachable and serving to hold the diaphragms in position. The diaphragms, which may be of copper or other suitable material, prevent leakage of the hydraulic fluid.
Patent GB-392069-A (GB)
Title: Improvements in or relating to sun-blinds
IPC: E04F10/02
Filed: 1932-10-15
Abstract: 392,069. Sun blinds. SMITH, F., 27, Berkeley Terrace, Harehills, Leeds. Oct. 15, 1932, No. 28815. [Class 52 (v).] A window blind is adapted to be folded up into a receiving box by means of tapes connected between spring rollers and the blind frame and running through rings secured to the blind. As shown by Figs. 1 and 3, in front and side sectional elevation, respectively, the top edge of the blind is tacked to a partition b which extends along the length of a receiving box a, and the lower edge of the blind is secured to a frame composed of a central part e and two end portions f slidable within the part e. The receiving box a contains five spring rollers c to which are secured tapes d which pass through slots in the partition b and through rings q in the blind to be attached to the frame e. In use, the portions f are slid outwardly to support side extensions n of the blind. From the window frame g two swivelled steel arms h project to support the extensions f and two chains L, suspended from fastenings K, are secured to the arms h by clips m. To fold up the blind, the side extensions n are unfastened from the frame portions f and held folded under the main blind by press-studs s. The portions f are then slid within the main frame e and, when the weight of the blind is taken by a pole inserted at u, the spring rollers c wind the tapes and the blind commences to fold, as shown in Fig. 3. When the tapes are wound fully the blind is folded tightly into the front portion of the receiving box a.
Patent GB-966132-A (GB)
Title: Improvements in starting systems for electric motors
Inventor: COOKE ALBERT EDWARD
IPC: H02P1/28
Filed: 1959-08-24
Abstract: 966,132. Control of A.C. motors. TRIP-LITE Ltd. Aug. 24, 1960 [Aug. 24, 1959], No. 28851/59. Heading H2J. Impedances L1, L2 and L3 with short-circuiting contacts 24, 25 and 26 are connected in circuit with the phase windings of an A.C. motor 10 which is directly coupled to a textile or other machine, and relays RL1, RL2 and RL3 shunted by capacitors C1, C2 and C3 respectively are provided for by-passing the impedances in turn at timed intervals so that the motor accelerates smoothly up to normal running speed after starting. With the starter switch 14 in the " off" position, relay RL1 is energized over a rectifier 19 and contacts 27, whereby the contacts 24 are caused to be open and contacts 22 to be closed; relay RL2 is energized over the contacts 22, causing contacts 25 to be open and contacts 23 closed, thereby energizing relay RL3 and causing contacts 26 to be open. On starting the motor, the switch 14 is closed and the contacts 27 opened. Relay RL1 remains energized, however, until the capacitor C1 becomes discharged so the contacts 24 do not close immediately. Thus current is supplied to the motor with all inductances in circuit. After a short delay, dependent upon capacitor C1, relay BL1 is de-energized whereby contacts 24 are caused to close and contacts 22 to open. Thus relay RL2 is disconnected from the output of rectifier 19 and inductance L1 is short-circuited. After a delay dependent on capacitor C2, relay RL2 is deenergized, causing contacts 23 to open and contacts 25 to close so that inductance 22 is short-circuited. Inductance L3 is similarly short-circuited by contacts 26 after a delay dependent upon capacitor C3. The sequential steps in starting allow the motor to be started up gradually without shock to the driven machine. In a modification, a plurality of inductances are inserted in circuit with each phase winding and are short-circuited in groups.
Patent GB-427328-A (GB)
Title: Improvements in electro-magnetic relays for electric welding machines
IPC: B23K11/24
Filed: 1933-10-19
Abstract: 427,328. Electromagnetic switches. NEW PROCESS WELDERS, Ltd., Scotts Road, Southall, and HOHS, F. C., 8, The Green, Heston, both in Middlesex. Oct. 19, 1933, No. 28987. [Class 38 (v)] In an electric welding-machine such as described in Specification 157,922, [Class 38 (v)], in which the welding current is cut off automatically on completion of the weld by means of an electromagnetic relay, the length of air gap between the armature and electromagnet in such relay is made adjustable and a moving pointer dial or other indicating device is provided to indicate the adjustment of the air gap. As shown in the Figure, a portion of the secondary conductor of the welding transformer is surrounded by an interrupted iron ring a to which is adapted to be attracted an armature f carried on a pivoted arm c, an extension o also carried by the arm c being adapted to close spring contacts n in the circuit-breaker tripping circuit. To adjust the value of current at which the attraction of the armature occurs, a downward projection h attached to the arm c at a point outside the casing b rests on an adjustable snail cam i which can be rotated by means of a graduated setting knob k provided with an indicating dial l. The arm c further carries an adjustable weight g.
Patent GB-1520355-A (GB)
Title: Line fire detector
IPC: G08B17/06
Filed: 1976-07-07
Abstract: 1520355 Electrical measurement of temperature D W BURT 6 Sept 1976 and 2 Feb 1977 [13 July 1976] 28987/76 Heading G1N [Also in Divisions G4-6] A fire or temperature detector comprises a cable nl having a pair of conductors separated by PVC insulation whose electrical properties change with temperature and means connected to the conductors for detecting variations in the electrical properties. As shown, one end of the conductors are connected in one arm of a bridge n2 and a "padder" resistor n3 is connected across the conductor at their other ends. As described with reference to Fig. 1B (not shown), the bridge includes a differential amplifier whose analogue output is applied to alarm and fault relays.
Patent GB-926005-A (GB)
Title: Improvements in electrical make-and-break switches
IPC: H01H1/14
Filed: 1959-08-25
Abstract: 926,005. Switch contacts; air-break switches. J. L. GRATZMULLER. Aug. 25, 1959 [Aug. 27, 1958 ; Aug. 24, 1959], No. 29019/59. Class 38 (5). A face-contact make- and-break switch comprises two relatively movable members, of which one movable member 8 has a substantially flat, smooth contact surface of relative hard material and the other member is fixed and comprises at least one fingerlike element 1 whose contact - making extremity at least is of relatively soft material, the or each element 1 being aligned in the general direction of relative movement, and fluid power means for relatively moving the two contact members. Three fingers 1, e.g. of copper, are deformed into good contact with the flat member 8, e.g. of hard bronze, when the switch is closed by means of an hydraulic jack 36, the member 8 being tiltable in any direction. A strong circuit-breaking spring 43 is compressed simultaneously, and rapidly breaks the contact when the hydraulic cylinder 36 is exhausted subsequently. Contact between fingers 1 and member 8 is maintained by a spring 22 at a predetermined pressure sufficient to avoid excessive temperatures due to current heating, the pressure being maintained even if the hydraulic pressure fluctuates, providing the hydraulic pressure is sufficient to overcome the strength of spring 43.
Patent GB-485923-A (GB)
Title: Improvements in and relating to tents, boats, masts and other collapsable structures comprising inflatable pneumatic tubes or framework
IPC: E04H15/20
Filed: 1936-10-26
Abstract: 485,923. Covers for inflatable tubes. DIXON, H. S. Oct. 26, 1936, No. 29043. [Class 113 (ii)] [Also in Groups X and XXVIII] Canvas covers for inflatable frame members for tents, posts, boats and similar structures, and of the kind described in Specifications 358,094 and 448,129, [both in Group X], are formed of strips of fabric some of which have the weft running longitudinally of the frame member and others have the warp running longitudinally; this arrangement is stated to prevent distortion. In one form, the canvas cover is formed of two strips d, e, the strip d having the weft running longitudinally and the strip e the warp running longitudinally. These strips are joined along their edges by adhesive and stitching f, two divergent rows of stitching being used at the ends of the cover where a clamping member h, h<1> is used to "stop-off" " the end. The inflatable tube a lies within the cover and a valve c with reinforcement k is provided whereby the tube is inflated. In a modification, each strip is compounded of layers, one layer of each strip having the weft running longitudinally and one layer the warp running longitudinally. In a further modification, the weft may run longitudinally in both strips which, however, are of different textures.
Patent GB-653550-A (GB)
Title: Improvements in and relating to dough moulding and shaping apparatus
IPC: A21C7/01
Filed: 1948-11-09
Abstract: 653,550. Sheeting and coiling up dough. BAKER PERKINS, Ltd. Nov. 9, 1948, No. 29122. Convention date, May 21. [Class 87 (ii)] A dough piece is flattened by progressive application of pressure from a forward to the rear edge, the flattened dough piece being formed into a scroll having the rear edge as a core and the forward edge on the outside. Dough pieces are sheeted by rollers 12, Fig. 1, and fall on to a flipper belt 14 comprising an endless belt 16 riding over a large rear pulley 18 and a smaller forward pulley 20, the upper run of the belt being guided to travel in an arc. The sheets of dough are carried to pulley 20 where the belt flips the sheets end over end on to a conveyer 22 which carries them to a coiler 24 to make a coil or scroll whose core thus comprises what was the trailing edge of the sheet in its passage through the rollers. The coil is then carried beneath a pressure board 32. Fig. 2 shows a modified doughflipping mechanism which comprises a belt 40 travelling in a direction opposite to that of the conveyer, and a downwardly inclined plate 44. The dough pieces are carried from the sheeting rollers to the turn 42 of the conveyer and fall on to the plate 44 so as to be reversed. They then slide on to conveyer 22 and are carried to the coiler and pressure board. Specifications 593,279, [Group XXX], and 600,930 are referred to.