baber/WOPTO huggingface dataset:
Patent GB-546395-A (GB)
Title: Improvements in or relating to sound recording apparatus
IPC: G11B7/00
Filed: 1941-03-14
Abstract: 546,395. Sound recording apparatus. RADIO CORPORATION OF AMERICA. March 14, 1941, No. 3535. Convention date, March 30, 1940. [Class 40 (ii)] [Also in Group XXXIX] A circuit having an A.C. input corresponding to sound and a D.C. output corresponding to the envelope of the A.C. input for use in making noiseless sound records comprises at least one frequency doubler in conjunction with a filter and an amplifier. The filter being such that it will not properly filter a 30 to 50 cycle frequency but will adequately filter the doubled frequencies applied thereto. This enables adequate filtering with little time-delay. As shown in Fig. 1, the A.C. input is amplified by a valve 11 and the frequency doubled twice by two successive full-wave rectifiers 15, 16 and 18, 19. These are followed by tne filter 21 .. 26 feeding the D.C. amplifier 27, which yields a plate current increasing with increasing A.C. input. The filter connections may be changed, Fig. 2 (not shown), to cause amplifier 27 to yield plate current decreasing with increasing A.C. input. In a modification, Fig. 3, the frequency is doubled five times by the rectifiers 36 .. 40. To make up for loss of high frequencies in this chain, these high frequencies are fed from a tapped resistance 20 across the input to transformer 10 through a high-pass filter 50, 51, 52, to a valve 53 feeding a singlewave rectifier 57, and the output of this rectifier is added to the output of the main chain 36 .. 40 in the filter 24, 58 .. 63 followed by the D.C. amplifier 27. The D.C. current may be used for operating a noise reduction shutter as described in Specification 494,114.
Patent GB-230244-A (GB)
Title: An improved coupling for pipes
IPC: F16L37/16
Filed: 1924-02-11
Abstract: 230,244. Quinet, G. J. P. Feb. 11, 1924. No Patent granted (Sealing fee not paid). Couplings, disconnectible; tapered spigot-andsocket joints.-In a pipe coupling of the type wherein a double-coned junction piece is inserted in the opposing ends of a pair of axially aligned pipes, and a clamping device, connecting the two ends of the pipes, is employed to couple the two ends and cause the junction piece to engage seatings therein, the ends of the pipes a, b, in which the junction piece c is engaged, are connected by a swinging lever d, one part of which is pivotally connected to the pipe b and another part d<1> of which is adapted to be engaged over an abutment e associated with the other pipe a. The lever d is provided with a spring detent f to prevent accidental displacement thereof, while a lateral outlet g, normally closed by a plug e<1>, may be provided and employed when desired for tapping some of the fluid passing through the pipes.
Patent GB-228709-A (GB)
Title: Improved device for facilitating the cutting of woollen yarn or the like into uniform lengths, particularly for rug or mat making
IPC: D03D39/24
Filed: 1924-02-12
Abstract: 228,709. Leeds, C. H. Feb. 12, 1924. Pile fabrics. - A device for facilitating the cutting of woollen yarn &c. into equal lengths for use in making rugs, mats, &c. comprises a gauge or bar 1, Fig. 2, rotatable by a handle 5, grooved at 3 for the reception of a cutting-knife to sever the convolutions of yarn, and provided with means for locking the bar against rotation. In use, the end of the yarn 2 is secured to a clip 11 on the bar which is then rotated to fill the bar with yarn as shown, even winding being ensured by leading the yarn over a bobbin 10 loose on a rod 9. When the gauge has been wound from end to end, it is locked in position with the groove 3 uppermost by a loop 6 adapted to take into slots 7 in a support 4, the end of the yarn being secured by a clip 12. A knife 15 held between adjustable cheeks 16, 17 , Fig. 6, carrying guiding members 19 is then passed along the groove 3 to sever the yarn into lengths. The knife, which may be a safety-razor blade is inclined as shown in Fig. 2. In a modification, the cutting-knife is mounted in a holder pivotally attached to the guide members 19, and is held in operative position by a screw.
Patent GB-432728-A (GB)
Title: Thermionic detector
IPC: H03D1/16
Filed: 1934-02-05
Abstract: 432,728. Valve circuits for wireless reception. ARDENNE, M. VON, 19, Jungfernstieg, Lichterfelde-Ost, Berlin. Feb. 5, 1934, No. 3672. Convention date, Feb. 15, 1933. [Class 40 (v)] To increase the efficiency of a valve detector for short-wave signals below ten metres, a grid-leak choke or resistance 8, Fig. 1, of the order of 10' ohms is used, in combination with a positive bias of 5 volts. Similarly as shown in Fig. 2, a relatively low value of resistance, again of the order of 10<4> ohms, is used in combination with an anode voltage of 100-500 for anode rectification. The object is to increase the speed of the electron stream inside the valve. Specification 383,503, is referred to.
Patent GB-279299-A (GB)
Title: Damping vibrations in acoustic and sound recording apparatus
IPC: H04R1/16
Filed: 1926-04-22
Abstract: 279,299. Sykes, A. F. April 22, 1926. Diaphragms; magnetic instruments; microphones.-Vibrating diaphragms, armatures, &c. are damped by one or more cords, strips, or other solid body directly or indirectly connected therewith and extending to an anchoring or in a free state which may take the form of a loose coil, ball, or volute, the mass, length and material being such that the vibration is wholly absorbed and none reflected. A stranded cable or strip covered with rubber or wool or both, is suitably employed. Fig. I (4526/27) shows the damping cable 433 connected to the centre of the diaphragm 429 of a telephone receiver and coiled within the casing 424. Fig. V (4526/27) shows a multiple damping cable 433 connected to two points on a diaphragm 3 and coiled around the tone arm 437 of a sound recording or reproducing machine. The cable may be connected to the stylus or stylus holder, or to the armature, stylus or stylus mounting of an electromagnetic sound box or to the armature of a microphone. In Fig. I (3779/27), damping strips 431 are formed integral with a diaphragm 429 and bent up into volutes, and in Fig. IX (3779/27), the diaphragm 432 is extended beyond the sound box 436 on some or all sides, or formed as an enlarged disc, to provide damping strips on a surface which is covered with rubber 431 and wool 435. The diaphragm is secured by stitching 449 to the sound box flange 448. The damping strip as applied to the electrodynamic sound box described in Specification 263,502 comprises an extension 431, Fig. V (3779/27), of the vibrating strip 1, but it may be separate and secured at one end against the strip 1 at its mounting. Fig. VIII (3779/27) shows the damping member 431 attached to the pivoted member 3 which carries the stylus and is linked to the vibrating member 1. Specifications 258,137 and 263,502 are disclaimed and Specifications 243,395, 252,228 and 256,280 are referred to.
Patent GB-447698-A (GB)
Title: Improvements in or relating to microphones
IPC: H04R21/02
Filed: 1935-02-07
Abstract: 447,698. Microphones. SIEMENS BROS. & CO., Ltd., Caxton House, Tothill Street, Westminster, and SUTTON, G. W., 25, Cranleigh Road, Merton Park, and GOODWIN, W. E., 72, Glyndon Road, Plumstead, both in, London. Feb. 7, 1935, No. 3973. [Class 40 (iv)] A differential telephone transmitter involving connections to three electrodes is constructed as one of the " capsule " type, i.e. the transmitter comprising the diaphragm, granule chamber, electrodes and other components is assembled as a unit ready for insertion into a holder provided with the necessary contacts for instantaneously completing the circuits through the electrodes. In the construction shown in Fig. 1, the microphone comprises a main casing 7 preferably of brass, separated from a metallic granule chamber 17 by insulating material 18, relative rotation of the parts being prevented by keys 19, 20 formed in the material 18 in assembly. One of the fixed electrodes 2 is carried by the inner brass wall 21 of the granule chamber, and the other fixed electrode 3 by a metallic sleeve 26 mounted in an insulating ring 24 that forms the outer wall of the granule chamber. The movable electrode 1 is secured to a rod 11 attached to the centre of the thin aluminium alloy diaphragm 4, the edge of which is clamped to the casing 7. A spring ring 33 serves to press the microphone against the mouthpiece part of the holder into which it is inserted, and with the casing 7 forms one of the three electrodes, the other two electrodes being constituted by the wall of the chamber 17 and by the spun over edge 27 of the sleeve 26, the annular form of all these electrodes permitting the contacts therewith to be unaffected by rotation of the transmitter in the holder. In a modification, Fig. 5, the main casing 45 is moulded from insulating material, and supports contact members 23, 46 and 49 connected respectively with the fixed and movable electrodes. In another construction, Fig. 10, a modulating member 67 of insulating material mounted on the rod 11 is adapted on movement to influence the distribution of granules between the electrodes 2, 3 and a third fixed electrode 66. Minor modifications are described in several further constructions.
Patent GB-247581-A (GB)
Title: Improvements in or relating to machine tools for cutting or turning metal
IPC: B23B7/12
Filed: 1924-11-19
Abstract: 247,581. Potter, W. W. Dec. 11, 1923, [Convention date]. Turning; chucks.-In a lathe or other metalturning machine of the kind in which the cutting- tool is pulled over the work instead of. being pushed, a rotary spindle 12 having a chuck 13 operated by a draw-spindle is driven through gearing from an electric motor mounted outside the gear casing 11. Two tools 50 for turning the work to different diameters are mounted in a carrier 51, hinged at 52, so as to swing into and out of cutting position to a slide 44 moved axially by a rod 43 which is pulled during cutting by a cam-drum 21, and is pushed back by a spring 46. The tool-carrier is guided by a bar 45. The arrangement of the complete machine forms the subject-matter of Specification 226,178.
Patent GB-129940-A (GB)
Title: Improvements in or relating to Pin Spanners or Wrenches.
IPC: B25B13/48
Filed: 1919-02-18
Abstract: 129,940. Fuller Accumulator Co., and Welch, A. P. Feb. 18, 1919. Pin wrenches; inserted and internal-grip wrenches; retaining in engagement.- A pin wrench is formed with one or more of the pins movably arranged on a lever or levers pivoted to a handle member, and spring pressed so as to grip and hold the nut or part to be turned, whereby it may be used to convey the nut &c. into position and also to screw up or unscrew it. Fig. 2 shows a wrench adapted for the screwed ring or nut by which the glass or lamp holder of an electric safety lamp is held in position. It comprises a handle j i having one pin D fixed or rigid therewith and the second pin E on a lever G pivoted at F and pressed outwardly by a spring H to grip the ring when the pins have been inserted in the slots formed therein. The end of the lever G is pressed to retract the pin E to the position for insertion, and on its release the spring causes the pins to grip and hold the ring or nut.
Patent GB-806076-A (GB)
Title: Magnetic core switching circuit
IPC: G11C11/06
Filed: 1957-02-06
Abstract: 806,076. Circuits employing bi-stable magnetic elements. NATIONAL CASH REGISTER CO. Feb. 6, 1957 [March 6, 1956], No. 4041/57. Class 40 (9). [Also in Group XL (c)] In a magnetic storage matrix there are tworow wires each driven from one end and connected together to an electronic switch at their other ends, and two column wires each driven from one end and connected together to an electronic switch at their other ends; the switches gating half-write pulses on one row and one column wire to drive a core intersected by such wires in one direction and gating half-write pulses on the other row and column wires to drive the core in the other direction. As shown in Fig. 3, row windings 16a, 18a ... and column windings 17a, 19a ... are connected to the collectors of transistors such as 63 and 64, respectively. Positive pulses applied to the base of a transistor 63 or 64, which is normally non-conducting, connects the associated winding to a negative potential connected in common to the transistor emitters. The row windings are driven over diodes from a pulse source Py while the column windings are driven over diodes by a pulse source Px. Additional row windings 16b, 18b . . . are driven from a pulse source Ny and additional column windings 17b, 19b ... are driven from a pulse source Nx, each additional winding being connected to the collector of their associated row or column transistor. A sensing winding 25 linked with every core of the matrix is connected to the input of a transistor amplifier 26 the output of which is gated by a strobe pulse 49 (see Fig. 7). An inhibiting winding 24 linked with every core is driven from a circuit 31 actuated by an inhibiting pulse 50 applied to lead 30 over a gate 29. By applying controlling pulses to transistors 63, 64, core 15 may be interrogated by coincidence of the Px and Py pulses. Switching of core 15 produces a signal in sensing winding 25 coincident with strobe pulse 49 and the output of amplifier 26 triggers a bistable circuit 27 to close gate 29. Immediately following the Px, Py, pulses sources Nx, Ny deliver pulses to windings 18b, 19b to switch core 15 back to its initial state. If core 15 is not switched, no signal is induced in sensing winding 25, bi-stable circuit 27 is not triggered so that gate 29 remains open and, coincident with delivery of Nx, Ny pulses, inhibiting winding 24 is energized to neutralize the effect of the Ny pulse and thus prevent switching of core 15. The transistor control pulses are applied a time #t 1  earlier than the Py drive pulse to permit build up of carriers in the transistors. The Py drive pulse occurs at a time #t 2  after the Px pulse as sensing winding 25 is wound parallel with the row windings and time is allowed for induced transients to fade before the core 15 is switched. Transistor circuits are illustrated of an amplifier suitable to provide drive pulses for the column and row wires, the amplifier 26, and the driving circuit 31 (see Group XL (c)).
Patent GB-162821-A (GB)
Title: Improvements in apparatus for making tar-macadam or the like
IPC: E01C19/10
Filed: 1920-02-10
Abstract: 162,821. Hobbs, J. E. Feb. 10, 1920. Tar - macadam, plant for making.-Consists in apparatus for separately drying the sand and stone forming the solid ingredients of the tarmacadam and transferring them by way of heated flues to separate weighing-devices which discharge into a chamber where the aggregate is mixed with a binder such as tar. In the plant shown in Fig. 1, two sets of apparatus for drying and weighing are arranged side by side, each set comprising a charging-hopper 11, a rotary drying-drum 9, an endless-band elevator 5, and a weighing-hopper 16. The gases from a furnace 3 are drawn by a fan 14 through flues 4 and pass in the opposite direction to the stone through the casings of the elevators 5 and drums 9 and on through flues 13 to the atmosphere or to a dust collector. The two batches of aggregate together with tar from a cauldron 23 are discharged into a mixer 20 fitted with rotary stirring arms. Arranged on the platform 1 is a series of hand-levers 36 which control respectively the outlet from the mixer 20, the doors 19 on the weighing bins, the clutches for stopping and starting the elevators, the drum shoots 10 and the doors 12 on the hoppers 11.
Patent GB-683708-A (GB)
Title: Improvements in and relating to mercury arc rectifier apparatus
IPC: H02M7/15
Filed: 1950-02-17
Abstract: 683,708. Control of D.C. motors. HACKBRIDGE & HEWITTIC ELECTRIC CO., Ltd., and STRIKE, H. S. P. Feb. 7, 1951 [Feb. 17, 1950], No. 4114/50. Class 38 (iii) [Also in Group XXXV] The control gear for the driving motor of a lift or the like incorporates the phase regulator 11 associated with a mercury arc rectifier system comprising grid controlled anodes a<SP>1</SP>, b<SP>1</SP>, c<SP>1</SP>, connected respectively to the secondary windings t, t<SP>1</SP>, t<SP>2</SP> of a transformer so as to receive the maximum voltage therefrom, and non-grid controlled anodes a, b, c connected to a low voltage source (e.g. low voltage tappings on the windings t, t<SP>1</SP>, t<SP>2</SP>, the phase regulator being arranged to operate on the grids associated with the anodes a<SP>1</SP> b<SP>1</SP>, c<SP>1</SP> so as to vary the rectified output voltage between a fixed minimum value determined by the low voltage source connected to the anodes a, b, c and the maximum value supplied to the anodes a<SP>1</SP>, b<SP>1</SP>, c<SP>1</SP>, in order to control the motor speed.
Patent GB-720708-A (GB)
Title: A device for removing plaster casts from living bodies
Inventor: SCINTILLA AG
IPC: A61F15/02
Filed: 1953-02-13
Abstract: 720,708. Cutting plaster bandages. SCINTILLA, Ltd. Feb. 13, 1953 [Feb. 19, 1952], No. 4144/53. Class 81 (2). An appliance for cutting plaster bandages comprises a tool which performs both shearing and sawing actions. The tool 2 is oscillated vertically by an electric motor, not shown, and carries saw teeth 3 on its front edge and a shearing edge 4 on its lower end, the latter cooperating with a corresponding edge 6 on the foot 5. The saw teeth 3 are appreciably wider than the rear part of the blade 2 and the support 8 for the foot, to facilitate guiding the appliance. The teeth are so shaped as to perform their cutting action on the return stroke of the tool.
Patent GB-621271-A (GB)
Title: Knock down cabinet
IPC: A47B47/03
Filed: 1947-02-13
Abstract: 621,271. Cabinets. DEHN, F. B. (G.R.M.C., Co.). Feb. 13, 1947, No. 4213. [Class 52 (i)] A knock-down cabinet. comprises vertical sides, back, base, top and shelves of sheet metal detachably connected together, preferably by'interlocking means, tongues on the sides engaging, the back, shelves and top. As shown the vertical sides 6 have rear flanges 12 with forwardly projecting tongues 13 and front flanges 7 with rearwardly turned edges 8 having tongues 10 adjacent to which are notches 11, 11a. The back 15 fits in front of the rear flanges 12 of the sides and is provided with slots 16 through which the tongues 13 pass and with inwardly pressed ribs 26 for locating the shelves and top. The top 34 has rear and side flanges 35, 36 and a. front flange the ends 41 of which are recessed rearwardly of the intermediate portion 37 which has a recessed lower portion 39, to serve as the door jamb, and an inwardly projecting portion' 40, slots 42 being provided for the tongues 10 and parts' of the top being adapted to snap into the notches 11a to lock the top in position. The base comprises a front I and two side portions 3 all of channel section and all secured together. The bottom shelf 18 is provided with side flanges 20, a rear flange 19 with slots into which pass the tongues 13 of the vertical sides while the front of the shelf is provided with flanges 21, 23, 25 similar to those disposed on the front of the top section 34. The remaining shelves have flanges 29, 30 similar to those of the bottom shelf 18 and with, at the front, flanges 31, 33 as shown. The front edges of the shelves snap into the notches I for locking purposes. A front panel 43, having flanges 44, serves.as a door and is provided with hinges 48, 49.
Patent GB-324821-A (GB)
Title: Improvements in flyers for roving, spinning, twisting and like frames
IPC: D01H7/48
Filed: 1929-02-08
Abstract: 324,821. Crawford, R. W. Feb. 8, 1929. Spindle apparatus. Flyers for roving, spinning, twisting, and like frames for jute, flax, hemp, and the like are slotted to accommodate a roller around which the yarn passes to the leg. Conveniently, the roller is mounted on a bush loose on a diametrical pin 5 so that it is readily nenewable.
Patent GB-130284-A (GB)
Title: Soft Collar Brooch.
Inventor: MOORE WILLIAM HENRY
IPC: A41B3/12
Filed: 1919-02-20
Abstract: 130,284. Moore, W. H. Feb. 20, 1919. Soft - collar fasteners. - A softcollar brooch comprises a rigid bar a having pointed hook ends a<2> to engage in the usual holes in the points of the collars, and a steel strip d riveted thereto at its middle point. The arms d<2> of the spring are provided with holes which receive the ends of the hooks a<2> and the ends of the arms are so bent that with the hooks a they each form a convex V into which the fabric of the collar is introduced automatically separating the hook end and spring.
Patent GB-1367055-A (GB)
Title: Guide rods for mounting on armoured face conveyors for guiding  mining machines along said conveyors
IPC: E21C35/12
Filed: 1973-01-27
Abstract: 1367055 Mining installations PITCRAFT Ltd 27 Jan 1973 4285/73 Heading E1F A guide rod for mounting on an armoured face conveyer for guiding a mining machine along the conveyer comprises a bar 1 of square or rectangular cross section provided with a series of longitudinally spaced recesses 2 and square cut ends and a torque member and a fork member so welded to opposite ends of the bar that the torque and forked ends are all orientated either parallel to the central plane through the recesses in the bar or perpendicular to that plane. The rod is used in the guidance of a mining machine propelled as in the referred to Specification 1352543.
Patent GB-996332-A (GB)
Title: Method and apparatus for recovering waste gas from oxygen top blowing converter in unburned state
IPC: C21C5/40
Filed: 1962-02-05
Abstract: In a furnace plant in which gases from an oxygen blowing converter 1 flow through a water-cooled heat exchanger 5 before being drawn by a blower 11 through a dust separator 9 and into a gas holder 13, the static gas pressure in the gas cooling heat exchanger 5 is maintained at less than 5 M/M water gauge.  In the plant shown, fluctuations in the static pressure in the heat exchanger 5 are sensed by a manometer 4 <PICT:0996332/C4-C5/1> which so regulates the operation of valve 15 as to supply a jet of gas forced by an impeller 14 through one or other of two pipes 7 opening within the heat exchanger in opposite directions as shown, thus raising or lowering pressure as necessary. The manometer also regulates control of a valve 10 in the gas duct between the separator 9 and the blower 11; and a valve 151 controlling the blower speed.
Patent GB-1415286-A (GB)
Title: Non-crucible zone melting of semiconductor rods
IPC: C30B13/28
Filed: 1974-01-31
Abstract: 1415286 Zone-melting SIEMENS AG 31 Jan 1974 [18 April 1973] 04458/74 Heading B1S In the non-crucible zone melting of a crystalline semiconductor rod by an induction heating coil the formation of a desired electrical resistance profile in the zone melted rod is achieved by carrying out the zone melting in a shielding gas atmosphere wherein the flow speed, flow direction and flow temperature of the shielding gas in the region of the molten zone are so controlled as to produce changes in the material flow and temperature distribution in the molten zone and the adjacent portions of the rod. Suitable apparatus, as shown in Fig. 4, comprises a single turn flat induction heating coil 4 surrounding the molten zone 5 in a silica crystal 1, the shielding gas flowing upwards 20 is collected by a gas intake in the form of a gravity cylinder 23 and fed directly to the molten zone by means of guide vanes 22 and finally escapes upwards through the gap 28 so causing turbulence or rotation of the material in the molten zone.