baber/WOPTO huggingface dataset:
Patent GB-589246-A (GB)
Title: Improvements in or relating to the production of gear teeth
IPC: B23F19/06
Filed: 1944-11-07
Abstract: 589,246. Gear-cutting. McLEOD, R. J. Nov. 7, 1944, No. 21843. [Class 83 (iii)] In finishing toothed gears by shaving with an intermeshing generator cutter, the work U is rotated slowly on a stationary axis by an electric motor M and change gearing and coaxial freerunning cutters 12, 13 are rotated by the work on a parallel axis on a slide 4 which is reciprocated rapidly parallel to the cutter axis by an adjustable throw crank C driven by change gearing C' and an electric motor D. The cutters have serrations forming cutting edges extending from the root to the tip of each tooth and have the same helical angle as the work and the reciprocations do not disengage the cutters from the ends of the teeth on the work. The saddle 1 carrying the slide 4 is adjusted to and from the work on the bed 2 by means of a hand- or power-operated screw. Each cutter head 7, 8 is adjustably secured to the slide 4 by T-slots 6, Fig. 6, and bolts 11 and has a recess 7<1> to receive a block 16 provided with plain bearings, or the roller and ball thrust bearings shown in Fig. 5, for the cutter spindle 14. A wedge 20 in a slot in the block is slidable on a pin 21 secured to the head and is movable to adjust the cutter by means of a nut 23 and screw 24 rotatable by a worm-wheel 25 and a worm 26 on a shaft 27 mounted on the slide 4. The shaft 27, which is rotatable by hand, is formed in two parts joined by a toothed clutch 29 so that by disengaging the clutch one cutter may be adjusted relatively to the other. If one turn of shaft 27 moves the cutters by 0.001 inch, ten teeth in the clutch will allow relative adjustment of the cutters by 0.0001 inch. Each cutter head 7, 8 is adjusted on the slide 4 by a hand-operated screw 9. The machine may be arranged with the work axis vertical and the slide 4 and work rotation may be actuated from a common drive.
Patent GB-641207-A (GB)
Title: Improvements in and relating to circuits embodying electron discharge tubes
IPC: H03F1/08
Filed: 1948-08-18
Abstract: 641,207. Valve amplifying circuits. COSSOR, Ltd'., A. C., and COVILL, D. H. Aug. 18, 1948, No. 21851. [Class 40 (v)] In a high-frequency amplifier damping of the input circuit due to feed-back over the control-grid to cathode capacity Cg1k and the self-inductance 13 of the cathode lead is neutralized by means of a further inductance 14 in series with the inductance 13. The screen-grid is earthed for high-frequencies over a condenser 18, the inductances 13, 14 in conjunction with the capacity Cg1k and the screen-grid to controlgrid capacity Cg1g2 forming a bridge network, Fig. 2 (not shown), in which the voltage fed back to the input terminals 11, 12 may be reduced to zero; the Specification gives the condition for balance. In an alternative arrangement, Fig. 3 (not shown), which permits the input terminal 12 to be earthed, the inductance 14 is inserted between the H.T.+ terminal and the anode load 16 and the screengrid is returned directly to the join of the two.
Patent GB-928520-A (GB)
Title: Improvements in or relating to electromagnetic clutches or brakes
IPC: F16D43/09
Filed: 1959-06-25
Abstract: 928,520. Electromagnetic disc brakes. FRANCAISE DU FERODO S.A. June 25, 1959 [June 27, 1958; May 15, 1959], No. 21905/59. Class 103 (1). [Also in Group XXIV] An electromagnetically-controlled clutch or brake is provided with manually-adjustable means for maintaining a constant air-gap between the electromagnet and its armature when the electromagnet is de-energized. As shown in Fig. 1, an electromagnetic clutch brake combination for controlling the centrifugal weight carrier 25 of a " Gravina " type clutch (Specification 586,910) comprises an armature 35 fast with the weight carrier and urged by springs 48 into engagement with a friction lining 37 on a driving casing 30. A yoke 36 is non-rotatably mounted on a stationary housing 10 by bolts 51 axially slidable in the housing and biased to the left by springs 53 to a position defined by a stop which includes an adjustable wedge 54 and a distance-piece 56. To set the air gap the wedge is withdrawn the distance-piece removed and a blind nut 58 is screwed home. In this position the yoke is in contact with the armature. The wedge 54 is then inserted until a resistance is clearly felt due to the springs 53. The wedge is then fixed in this position, the distance-piece is replaced in position and the nut re-tightened so that an air gap equal to the thickness of the distance-piece is established. Fig. 9 shows an electromagnetic clutch comprising a yoke 70 fast with a driving shaft 68 and an armature 72 secured to a driven drum 69 by tangential flexible strips 73. Springs 76 disengage the clutch when the coil is deenergized, and radial spring strips 77 limit the disengaged position of the armature. The inner end of each strip is secured to the armature and the outer end is bent and secured to the periphery of the armature by a screw 78 which is adjustable to vary the buckling of the strip 77 and hence to adjust the air gap. In a modification of this clutch (Fig. 13), springs 76a move the armature away from the driven drum 69 to a position limited by a washer 82 which is secured to the armature by radial spring strips 80 engaging a washer 83 adjustably mounted on the yoke by a wedge arrangement similar to that of Fig. 1. When the coil is energized the armature engages the yoke, causing the strips 80 to flex.
Patent GB-256071-A (GB)
Title: Improvements in and relating to gratings for flooring and like purposes
IPC: E04C2/42
Filed: 1925-09-02
Abstract: 256,071. Law, J. A., (Irving Iron Works Co.). Sept. 2, 1925. Gratings. - Relates to gratings for floors, skeleton stairways, or platforms, and non-slip treads for paving slabs of the kind formed of parallel straight bars 1 connected by strip metal having inclined parts 5 with flat intermediate portions 3 fastened alternately to the bars 1. According to the invention, each end of an inclined portion 5 is doubly and oppositely curved where it merges into a flat portion 3.
Patent GB-394154-A (GB)
Title: Improvements in and relating to vehicle head-lamps
IPC: F21V11/16
Filed: 1932-08-05
Abstract: 394,154. Vehicle lamps. ADAMS, B., 14, Bedford Chambers, Covent Garden, London. Aug. 5, 1932, No. 22020. [A Specification was laid open to inspection under Sect. 91 of the Acts, May 8, 1933.] [Class 75 (iv).] Lantern screens.-A vehicle headlamp is provided with a shallow concave reflecting shield 4 formed and arranged so that when fitted to the lamp it lies obliquely with its principal axis passing above the filament in the direction of the rear upper portion of the main reflector 1, and its lower portion is disposed so as not substantially to obstruct light from the filament to the lower part of the reflector. The shield is in the form of a metallic spoon having a hollow shank 7, which embraces and is slidable along the limbs 9, 10 (not shown) of a spring clip 11, which is sprung round the cap 12 of the lamp bulb. The shield is preferably chromium plated, and its rear surface 5 and the upper face 8 of the shank 7 are highly polished.
Patent GB-783135-A (GB)
Title: Brush strip
IPC: A46B13/00
Filed: 1955-07-29
Abstract: 783,135. Brushes. OSBORN MANUFACTURING CO. July 29, 1955 [Oct. 5, 1954], No. 22057/55. Class 19. In a brush of the type in which the bristles are held in a channel form back beneath an elongated lognitudinal retaining element held in position by projections from the side of the channel, the projections are formed on a rim turned inwardly from the edge of the channel onto the inner side wall. As shown the projections are in the form of teeth punched from the edges of a metal strip before the edges are turned in. Preferably the teeth on opposite walls are staggered and those on one wall are longer than on the other. The channel back may be made of steeel, stainless steel, copper, brass or aluminium and the bristles may be of crimped wire, nylon coated wire, nylon monofilaments, tampico fibre or horse hair. The teeth may alternatively be welded to the inturned edge or may be formed as dimples on the inturned edge. When the strip is circularized the folded in edges of the strip tend to swing towards the wire and thus to increase the grip on the bristles. Specifications 645,407, 655,262, 698,727 and 710,222 are referred to.
Patent GB-1307883-A (GB)
Title: Microscopes
IPC: G02B21/22
Filed: 1970-05-07
Abstract: 1307883 Projection microscopes AMERICAN OPTICAL CORP 7 May 1970 [5 June 1969] 22110/70 Heading G2J A microscope has first and second optical paths converging at an object plane 34 and screen 18 onto which the image of the object plane 34 may be projected along the first optical path 24, and an illuminator 16 to illuminate the object plane along the second optical path 22. The illuminator and projection screen replace a stereo eye piece which may be connected to an adaptor 14. The adaptor, Fig.3, which fits onto the microscope body comprises a tube 30 adapted to receive the projection screen and a mirror 26 pivotable about a spindle 40 so that the projection path 24 may be deflected to the projection screen or pass through the adaptor into a conventional eyepiece. A lamp 16 forming the illuminator covers an aperture 20 in the adaptor 14.
Patent GB-802079-A (GB)
Title: Benzthiazyl sulphenamides and their use as vulcanization accelerators
Inventor: FIELDEN RICHARD JAMES
IPC: C07D277/80
Filed: 1955-08-02
Abstract: A process for the vulcanization of natural or synthetic rubber comprises incorporating in the rubber before vulcanization an N-1-alkylcyclohexylbenzthiazole-2-sulphenamide of the formula: <FORM:0802079/IV (a)/1> wherein R stands for an alkyl radical, e.g. methyl, ethyl, n-propyl or a higher straight chain homologue, and then vulcanizing the mixture so obtained.  The synthetic rubbers used include polymers of butadiene-1 : 3, iso-buteneALSO:The invention comprises N-1-alkylcyclohexylbenzthiazyl-2-sulphenamides of the formula <FORM:0802079/IV (b)/1> wherein R stands for an alkyl radical.  The novel compounds may be obtained by reaction of benzthiazyl-2-sulphenamide with a 1-alkylcyclohexylamine, preferably by heating the reactants together, in the presence or absence of a solvent, at temperatures between 35 DEG  and 80 DEG  C.  It is preferred to use an excess of the amine and to remove the excess after reaction by, for example, distillation under atmospheric or reduced pressure, or by washing with a solvent for the amine, e.g. water.  The compounds may also be obtained by reaction of N-monochloro - 1 - alkyl - cyclohexylamine with sodium 2-mercaptobenzthiazole, or by reaction of 2-benzthiazylsulphenyl chloride with a 1-alkylcyclohexylamine.  The alkyl radical in the compounds may be, for example, methyl, ethyl, n-propyl or a higher straight-chain homologue.  The compounds are useful as delayed-action accelerators in the vulcanization of natural and synthetic rubbers. In an example, benzthiazyl - 2 - sulphenamide and 1 - methylcyclohexylamine are heated at 55-60 DEG  C. with stirring for 5 hours to obtain benzthiazyl-2-sulphen-(11-methylcyclohexyl)-amide.
Patent GB-170670-A (GB)
Title: Improvements in or in connection with the actuation and control of shutters, louvresand the like, particularly applicable to the shutters of the swell boxes of organs and like musical instruments
IPC: G10B3/16
Filed: 1920-07-26
Abstract: 170,670. Brindley, C. F. July 26, 1920. Swell-shutter actions.-Pivoted shutters of organs &c. are operated by motors each having two or more rates of movement and preferably comprising bellows controlled by foot-operated valves. The balanced shutter-louvers, connected by a transverse bar 1, are moved in one direction by the pneumatic motor 2, which is expanded at a certain rate by wind from a chamber 11 admitted through a valve 15 actuated by a pneumatic 14, to which wind is admitted by a pipe 28 from a chamber 33, Fig. 2, on depressing a button 24 with the foot. Release of the button 24 puts both the pneumatic 14 and the motor 2 to exhaust, the latter exhausting both through the valve passage 16a and through a second passage controlled by a pneumatic operated by the wind pressure in the passage 12a. The motor 2 is operated at a greater rate by depressing a button 25 admitting wind through a tube 30 to a pneumatic 22, closing a valve 20, and putting a pneumatic 19 to exhaust, wind at a higher pressure passing to the motor 2 from a chamber 17 through a duct 42. Or the wind-pressure in the chamber 17 may be the same as in the chamber 11 and the duct 42 made larger. Buttons 26, 27 operate duplicate apparatus to move the shutters at the two different rates in the reverse direction. In a modification, Fig. 6, the control-valves are operated by the foot-board 23 being made to rock forwards and backwards, the extent of the movement determining whether the buttons 54, which produce the faster movement of the shutters, are operated. In a further modification, small levers project through the fixed foot-board. Means for holding the shutters open, partially open, or closed comprise, a brake-pad 57 on a lever 58 normally held in contact with the shutter-bar 1 by a spring 59 acting on a rod 60. Actuation of any one of the control-buttons simultaneously admits wind to a pneumatic 66 permitting wind to pass from a chamber 62 to inflate a pneumatic 61 and raise the brake-pad. On release of the button, the pneumatic 61 is exhausted and the brake re-applied.
Patent GB-1360886-A (GB)
Title: Rebound shuffleboard
IPC: A63F7/00
Filed: 1972-05-12
Abstract: 1360886 Shuffleboard game IDEAL TOY CORP 12 May 1972 [1 June 1971] 22302/72 Heading A6H A shuffleboard game comprises an elongate board 10 (e.g. of plastics) having a wall 16 which divides the board into two alleys 18, 20, one alley having a baulk line 32 and the other with target areas 30 and a pit 34, and a V- shaped rebound device 28 at one end of both alleys 18, 20 which functions to rebound a puck 24, after, having travelled along alley 18, along alley 20, towards the target areas 30. The V-shaped rebound device 28 includes elastic (e.g. rubber) bands 26, 26' stretched over retaining pegs 38, 38', 40, 42. A scoring scale 49 and slider 52 is provided on each sidewall 49 of the board 10.
Patent GB-747774-A (GB)
Title: Improvements in or relating to transistors
IPC: H01L29/00
Filed: 1953-08-13
Abstract: 747,774. Transistors. TELEFUNKEN GES., [formerly TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE]. Aug. 13, 1953 [Aug. 13, 1952], No. 22320/53. Class 37. A PNP or NPN transistor has one of the outer zones of large area and formed by impurity diffusion, and the other zone of small area, whereby one zone displays the characteristics of (a) the collector, or (b) the emitter in a junction transistor, while the other resembles (a) the emitter, or (b) the collector in a point contact transistor. In this way the same device may be used to provide junction transistor characteristics (e.g. linear amplification, large output, but large collector-base capacitance and a relatively low frequency operating limit) or point-contact transistor characteristics (e.g. non-linear amplification, small output but small collector-base capacitance and operation and higher frequency). Fig. 5 shows an N-type single crystal 14 of germanium on a brass base electrode 13, with a blob of indium 15 welded on the upper surface to provide a P-type region, and a point contact 16 contacts the lower surface where a small P-type region is provided. Electrode 16 may consist of acceptor material or a tungsten wire coated with indium, so that the P-type resin may be produced by diffusion of material from the electrode. The contact area of the point contact may be of the order of one mm<SP>2</SP>. As shown, electrode 15 operates as the collector and electrode 16 as the emitter, thus providing a transistor with junction like characteristics. If electrode 15 is used as the emitter, and electrode 16 as the collector, the characteristics resemble those of a point contact transistor.
Patent GB-169350-A (GB)
Title: Improved folding bed
IPC: A47C19/12
Filed: 1920-07-27
Abstract: 169,350. Burton, C., and Shaw, R. A. July 27, 1920. Mattresses.-The wire mattress 30 of a folding bedstead provided with articulated side rails 13, 14 is carried by stretchers 31 attached by eyebolts 32 to bell cranks 33 which are engaged by the free ends 34 of the side rails 13, 14 to tension the mattress when the bedstead is extended.
Patent GB-186046-A (GB)
Title: Improvements in or relating to spring suspensions for the wheels of motor-cycle side-cars
IPC: B62K27/02
Filed: 1922-08-17
Abstract: 186,046. Brooke, A. P. T. Sept. 12, 1921, [Convention date]. Guiding vertical play; frame construction: springs, arrangement of.-The wheel axle of a motor-cycle side-car is carried by the crank-arm of a cranked axle journaled rearwardly of and' below the wheel axle in a sleeve-bearing on the chassis, the upward and rearward swinging movement of the crank arm being resisted by a spring. The chassis comprises two transverse bars 1, 2 connected at their outer ends by a longitudinal bar 5 which extends, at its forward end, obliquely and upwardly towards the motor-cycle. The wheel 16 is carried by a stub axle 15 secured to a cranked axle 17, 18 rotatably mounted in a sleevebearing 19 in a casting 6 which secures the bars 1, 5 together, movement of the axle being resisted by a spring 20 the longitudinal axis of which is preferably curved to the radius of the crank 17. The spring is secured at one end 22 to the stubaxle 15 or crank 17, and at the other end to a frame 21 which partly encloses the spring and is secured at 21<a>, 21<b> to the bar 5. The forward end of the side-car body is supported on a crossbar 12 which rests on springs 11 carried by a transverse bar 7 secured to the bar 5, and the rear end of the body is supported on a cross-bar 9 resting on springs 14 carried by lugs 13 on the bar 1. The bars 7, 9 are connected by longitudinal inclined members 8, which are braced by a member 10.
Patent GB-410456-A (GB)
Title: Improvements in and relating to control and safety-devices adaptable to ordinary chronometrical tachometers, for railways and tramways
IPC: G01P1/08
Filed: 1932-08-10
Abstract: 410,456. Train - control apparatus. RODOLAUSSE, E., St. Antonin, Tarn et Garonne, France. Aug. 10, 1932, No. 22435. Void [Abridged as open to inspection under Sect. 91 of the Acts, Aug. 26, 1932]. [Class 106.] A control apparatus for effecting an automatic brake application if the driver fails to observe: (1) a danger signal, (2) any fall in the brake-piping pressure, or (3) the prescribed speed limit, comprises a valve 53 opened when a speed-indicator hand 1 engages a speed-limit hand 3. The speed-limit hand 3 is manually set to a prescribed limit by turning the cup-shaped member 47 and then fixing this member by the screw 48; a spring 44 urges the hand spindle 35 in a clockwise direction to maintain a spindle arm 45 against a pin 46 in the cup member 47. The spindle 35 of the speed-limit hand 3 has frictionally mounted upon it a sleeve 37 with a drum 27 to which is attached one end of a chain 25 which passes round a pulley 26 carried by a spring- pressed piston 30 subjected to the brake-piping pressure while the other end of the chain is attached to a cam-actuated lever device 19 operated by the travel of the train after a danger signal has been passed. If the train is not provided throughout with automatic brakes a corresponding lower speed limit is imposed by appropriately setting a handle 98 which carries a jockey pulley 97 to displace the chain and thereby to retract the speed-limit hand. The valve 53 is opened when the speed-indicator hand engages the speed-limit hand, the latter thus being rocked about a pivot 4 so that the inner end 3<a> actuates a two-armed lever 57. which displaces the valve pusher rod 61. Pressure fluid from the main piping 54 is then admitted via the piping 56, 80, 81 to the underside of a piston 95 to open a valve 94 whereby the brake application and the perforation of a record strip 93 is effected. When a wayside signal is at danger a track apparatus acts to remove a detent lever 10 from the mutilated gear wheel 6 which being heavier on one side then engages a worm 15 driven from the train wheels; the camactuated lever device 19 then progressively retracts the speed-limit hand and unless the driver correspondingly reduces speed an automatic brake application will ensue. If the driver is alert and applies the brakes by his valve 72 the above automatic braking and penal recording is prevented as a plunger 75 in the piping 80, 81 is closed by a lever 73 actuated by a piston 83 to the underside of which pressure-fluid is admitted from the driver's valve 72 and pipe 71 ; the pipe 71 is only opened after a track actuation since the plunger 68 is withdrawn by the pivoting of the spring-urged lever 64, 65 when the gear wheel 6 has removed the stop arm 17. If the brakepiping pressure drops, the speed-limit hand will be retracted and an automatic braking ensues unless the speed is correspondingly low.
Patent GB-1196707-A (GB)
Title: Coloured Polyester Shaped Articles
IPC: G03C1/795
Filed: 1968-05-10
Abstract: 1,196,707. Tinted polyester articles. E.I. DU PONT DE NEMOURS & CO. 10 May, 1968 [24 May, 1967], No. 22435/68. Heading C3R. [Also in Division G2] Shaped polyester articles (e.g. photographic films) comprise a substantially homogeneous mixture of a hydrophobic polyester and in which Ar is an aryl radical having at least three alkyl substituents. Specified polyesters are those of terephthalic acid (or mixtures thereof with isophthalic acid) and ethylene glycol, diethylene glycol, propylene glycol, tetramethylene glycol and cyclohexane-1,4- dimethanol. Mixtures of these dyestuffs and N,N<SP>1</SP> 1,5 - anthraquinone - dianthranilic acid or Alizarin Rubine may be used. The dyestuffs may be added to the polyester forming ingredients or to the molten polyester.
Patent GB-818044-A (GB)
Title: Improvements in and relating to thermo-setting aminoplastic moulding compositions
Inventor: BROOKES ALFRED
IPC: C08L61/20
Filed: 1956-07-19
Abstract: Moulding compositions possessing high translucency and good mechanical properties are produced from aminoplastic resins derived from formaldehyde and urea, thiourea, melamine, dicyandiamide or related compounds, and a cellulosic filler which has been subjected to alkali swelling.  The cellulose used may be fibre, pulpboard, paper, yarn or fabrics and for optimum purity of colour and translucency of the product should be bleached and highly purified before swelling.  The alkali preferred for the swelling treatment is aqueous sodium hydroxide of 6-25 per cent strength used at a temperature of - 10 to +30 DEG  C.  Other cellulose swelling agents, e.g. zinc chloride, and/or wettingagents and alcohols may be added in small amounts, if desired.  The treated cellulose is freed of alkali by suction, filtration or centrifuging, followed by washing with water or alternate changes of dilute acid and water, dried and impregnated or compounded with the aminoplastic resin.  A suitable composition contains 85-65 per cent by weight of aminoplast and 15-35 per cent by weight of treated cellulose.  The resin impregnated pulp is then ground with hexamine base and either hexamine thiocyanate or methyl phosphate as curing agents.  Specification 649,740 is referred to.