baber/WOPTO huggingface dataset:
Patent GB-1495358-A (GB)
Title: Semiconductor devices
IPC: H01L29/73
Filed: 1975-04-15
Abstract: 1495358 Semi-conductor devices SOXY CORP 15 April 1975 [18 April 1974] 15474/75 Heading H1K The grounded emitter current amplification factor h FE  of a bipolar transistor, as illustrated of NPN type, or a device, e.g. thyristor including the elements thereof is improved by providing at distances less than the minority carrier diffusion length from the emitter junction, a potential barrier produced by an L-H interface between lightly and heavily doped regions of the emitter zone, and on a surface exposed portion of the lightly doped region a layer of insulation formed prior to provision of said potential barrier. In a typical embodiment (Fig. 1) comprising on an N + substrate on epitaxial collector region 3, ion inplanted base zone 2, epitaxial emitter region 1 and diffused heavily doped emitter region 4 and base contact region 5, the doping of regions 1 and 3 is 3 Î 10<SP>15</SP> and that of region 4 and substrate 6 is 2 Î 10<SP>20</SP> atoms/cc. Further improvement in emitter efficiency is achieved by provision of base adjacent zone 10 which reinjects minority carriers reaching it from the base zone. Analogous effects can also be produced by provision of negative ions in the insulating layer to cause an inversion layer extending from zone 10, or of positive ions therein or at an interface between a layer of genetic silicon oxide, silicon nitride, or alumina and an overlying layer of chemical vapour deposited silica. If the thickness of collector region 3 is properly selected the transistor operation in the inverse mode can be similarly improved. Features to be found in other embodiments are annular form of the base contact zone 5, extension of the base electrode to overlie the emitter junction and of the emitter electrode to overlie the lightly doped region and L-H junction of the emitter zone, interdigitation (in plan view) of the base zone and the regions of the emitter, division of the emitter into individual sections provided with a common electrode and with a sub-surface highly doped region extending from the base contact region 5 between the sections. In one embodiment (Fig. 9) the doping in the low doped emitter region varies about a minimum along line 11, while in another a P type base-connected region of grid form is provided in the low doped emitter region preferably against the L-H junction. A P-type region underlying P region 10 may alternatively be embedded in the collector region and optionally electrically connected to the base to improve inverse operation. In a further variant the base and emitter electrodes are of doped polycrystalline silicon and have portions at two different levels, while in another h FE  may be varied by signals applied to MOS, MNOS or MAOS type electrodes located over the L-H junction of the emitter zone. Two lateral transistor configurations are described (Figs. 15 and 16, not shown) together with configurations adapted for use in the grounded emitter mode to sense magnetic fields parallel to the emitter junction and to respond to pressure applied by a needle to the L-H junction of the emitter.
Patent GB-1344699-A (GB)
Title: Rotating brake disc subassembly with segmented beryllium core
Inventor: DERNOVSHEK J F
IPC: F16D65/12
Filed: 1971-05-18
Abstract: 1344699 Brake discs GOODYEAR TIRE & RUBBER CO 18 May 1971 [24 June 1970] 15502/71 Heading F2E A wheel brake disc assembly comprises a plurality of beryllium segments forming an annular core between steel annuli, each segment having at least one edge surface extending at an angle to a radial line, a plurality of metallic inserts received between the steel annuli, each insert being positioned between adjacent segments and having surfaces complementary to the edge surfaces of the adjacent segments for torque transfer, first fasteners securing the steel annuli to the segments, and second fasteners securing the inserts to the annuli. The steel annuli either comprise single plates 10, 12 or sets of 120 degree segments, the beryllium segments 18 overlapping the joints. The beryllium segments 18 extend 60 degrees and at each segment joint there is a steel insert 40, rivetted to the steel annuli, in a V-groove between angled faces of the beryllium segments 18. Axial grooves 20 through the inserts 40 and annuli, centrally situated over the beryllium segment joints, accept wheel splines or keys. Rivets 24 fixing the beryllium segments 18 to the steel annuli, are contained in cambered steel bushings 26, the lips 30, 32 of the annuli being bent inwardly to aid fastening.
Patent GB-813614-A (GB)
Title: Improvements relating to aerials
IPC: H01Q5/49
Filed: 1956-05-18
Abstract: 813,614. Aerials. ANTIFERENCE Ltd., and BEST, N. M. May 15, 1957 [May 18, 1956], No. 15519/56. Class 40 (7). The invention relates to directive aerial systems for operation with radio waves in two distinct frequency bands and having a common polarization. According to the invention such a system comprises a dipole construction capable of operation in both bands and provided with feeder connections, a lower frequency director element spaced from the dipole construction, and a resonant element approximately a halfwavelength long in the higher band placed close to and symmetrically with respect to the director element in such a way that the combination is effective as a director in the higher frequency band. In a simple embodiment (Fig. 1) the dipole construction comprises a lower frequency dipole 11 connected to a feeder (not shown) in central insulator 12 and an element 15 adjacent thereto and approximately half a wavelength long in the higher frequency band. Such a two-band dipole construction is described in greater detail in Specification 813,613. On the opposite end of the cross-arm 13 supporting the dipole construction is mounted a director 14 for the lower frequency and beyond it, and supported by a short extension of the cross-arm, is an element 16 approximately half a wavelength long in the higher frequency band. Use of this element in conjunction with director 14 provides a combination effective as a director in the higher frequency band and prevents the director 14 from shielding the dipole construction at the higher frequencies. The element 16 is stated to have little effect on the operation in the lower frequency band. If required further simple directors resonant in the higher frequency band may be placed on the cross-arm between the dipole construction and the director 14 and also on a further extension of it beyond the element 16 (Fig. 2, not shown). In another modification (Fig. 3, not shown) the simple dipole 11 is replaced by a folded dipole and simple reflectors operative respectively in the higher and lower frequency bands placed behind it. Fig. 4 shows another embodiment incorporating three simple directors 18 placed as mentioned above and a different form of dipole construction in which elements 11a a quarter wavelength long in the higher frequency band and inwardly directed are attached to the arms of the lower frequency dipole 11 at points a half wavelength of the higher frequency from the centre. The dipole construction may also comprise closely adjacent dipoles resonant in the higher and lower frequency bands respectively with the inner ends of their elements connected together and to the feeder (Fig. 5, not shown). In any of the embodiments more than one lower frequency director may be used providing each one has adjacent to it a higher frequency band resonant element. To broaden the bandwidth any of the resonant elements may be replaced by a pair of rods, one on either side of the arm 13 or by an arcuate sheet of metal centred on the associated lower frequency element.
Patent GB-561628-A (GB)
Title: Improvements in selector valves for use more especially in hydraulic operation of aircraft auxiliaries
IPC: B64C25/22
Filed: 1942-11-05
Abstract: 561,628. Valves. TURNER MANUFACTURING CO., Ltd., and GROVES, W. R. Nov. 5, 1942, No. 15578. [Class 135] In a selector valve assembly having radially-arranged valves 22, Fig. 1, opened against spring action by a cam 44 in a central chamber, each valve stem has pistons on each side of the valve, the diameter of the pistons being equal to the minimum diameter of the valve seat. In the form shown in Fig. 3, the valves are parallelly arranged and operated by a face cam 50.
Patent GB-420380-A (GB)
Title: Improved method of, and means for, making chains
IPC: B21L15/00
Filed: 1933-05-31
Abstract: 420,380. Making chains. SMITH, H. F., Beacon Works, Hampton Street, Birmingham. May 31, 1933, No. 15680. [Classes 83 (ii) and 83 (iv)] Expanding and stretching dies.-Links for chandelier type chains are formed by severing successively from a strip or sheet of metal 4 a number of link blanks 8, 10, 12 arranged one within another, the opposite sides of at least the larger links being subsequently bent inwardly. The shaping of the links is effected by tools 16, moved inwardly against the action of springs 25 by members 21 having bevelled surfaces engaging the rear ends 23 of the slides, and by tools 27 engaging within the eyes of the blank and either expanding them, stretching and narrowing them, or merely holding them stationary. The tools are replaceably mounted in a common ram. The smaller links 8 may be reduced in thickness before being acted upon by the tools 16, 27. The metal 6 may be rolled to reduce its thickness and converted into a further link.
Patent GB-1202836-A (GB)
Title: Stator assembly for electromagnetic indicating apparatus
IPC: H03M1/00
Filed: 1969-03-26
Abstract: 1,202,836. Electromagnetically operated indicators. BOWMAR INSTRUMENT CORP. 26 March, 1969 [12 April, 1968], No. 15754/69. Heading H2A. A magnetic stator assembly for an electromagnetic indicator providing a predetermined even number of indicating positions comprises a magnetic yoke 58 having at least the same number of angularly spaced, radially inwardly projecting poles 60, Fig. 3, and half the even number of angularly spaced windings 70, the windings being interconnected at one end 72 thereof, the other ends of the windings being connected through a switching arrangement 78 having the even number of positions to a D.C. source 96 according to a prearranged code so that in use, for a given position, at least two windings are connected to one polarity of the source and all the other windings to the other polarity. All the embodiments disclosed employ a radially magnetized P.M. rotor secured to an indicia-carrying drum 50, Fig. 1. In the 10 pole, 10 position indicator shown in Fig. 3, the five windings are symmetrically arranged and each traverses five poles, all of the windings are energized for every indicating position and the current consumption is constant. As shown, when windings 70-D and 70-E are connected to the positive terminal of the D.C. source and the other windings to the negative terminal, the rotor aligns itself with poles 2 and 7. In a modification, Fig. 6 (not shown), for 12 positions, 12 poles and six windings are provided, each winding traversing five poles as in Fig. 3, though in this ease to obtain the different rotor positions, sometimes two, sometimes three windings are connected to the positive terminal of the D.C. source and the current consumption is no longer constant. In a further modification, Fig. 9 (not shown), for 10 positions and having 10 poles, the five windings are wound toroidal fashion on the yoke with their ends overlapping. In yet another modification, Fig. 11 (not shown), for 10 positions, the windings are again wound on the yoke but each is split into two diametrically oppositely located parts. A 12 position indicator similar to that in Fig. 11 is described with reference to Fig. 14 (not shown). The switching arrangements required for the different indicator positions in all embodiments are given in tabular form.
Patent GB-128926-A (GB)
Title: Automatic Releasing Device for the Feeding of Horses and other Animals.
Inventor: CHRISTIANSEN CHRISTIAN
IPC: A01K5/02
Filed: 1919-06-23
Abstract: 128,926. Christiansen, C., and Christiansen, A. C. M. June 22, 1918, [Convention date]. Feeding-appliances for ammals.-Relates to automatic releasing appliances by which a supply of fodder for horses or other animals is released at predetermined times by one or more alarm clocks. According to the invention, the shaft 4, which actuates the discharging device, is operated by a spring and is geared to a shaft 11 carrying a cam-disk 15 normally held by a detent 18, pivoted at 18<a>. At a predetermined time, the alarm shaft 23 of one of the clocks 20 rotates, a cam 24 on the shaft actuating the slide 21 to which one end of the detent 18 is connected. The detent moving out of the path of one cam 13 on the disk 15 allows a partial rotation of the disk, but the detent now arrests the other cam 14 until the detent 18 is restored to its original position by further movement of the cam 24. when a further partial rotation of the disk 15 takes place. On the extension 5 of the shaft 4 are mounted collars 32, Fig, 6, carrying studs 31 which, on rotation of the shaft, displace the spring 30 and allow the hinged bottom 6 of a fodder-container 7 to drop. The gearing &c. is so arranged that one container 7 is discharged by the operation of each alarm clock. The driving spring is accommodated in recesses in the spurwheel 8, Fig. 1, and the ratchet wheel 9, which is turned by hand to wind it.
Patent GB-1211505-A (GB)
Title: Improvements in machines for manufacturing helically-seamedtubing
Inventor: MALKKI EINO KALERVO
IPC: B23K31/02
Filed: 1969-03-26
Abstract: 1,211,505. Making helically seamed tubing. E. K. MALKKI, and V. SILDE. 26 March, 1969 [7 June, 1968], No. 15820/69. Headings B3A and B3E. In a machine for making helically seamed tubing from a profiled strip 18a, in which the strip is positively guided through a distance corresponding to one turn of the seam and the seaming is performed by rolls 15, 16 located internally and externally of the tube, there is provided a loop comprising a flexible guiding element 10 into which the strip is fed to form it to a tubular shape and a support member 4 arranged to support the tube as it is being formed. The flat strip is passed through profiling rolls 2 and between guide blocks 13 to the guiding element 10. The latter, which may comprise a steel or plastics strip, a steel wire or a roller chain, is adjusted to the required tube diameter by rotation of a worm drive 6, which simultaneously adjusts the position of the support member 4. The seaming roll 16 is mounted in a slide (22), which is adjustable in two mutually perpendicular directions, Fig. 4 (not shown).
Patent GB-1083146-A (GB)
Title: Clamping devices
IPC: B41F27/12
Filed: 1965-04-14
Abstract: 1,083,146. Printing machines. ROLAND OFFSETMASCHINENFABRIK FABER & SCHLEICHER A.G. April 14, 1965 [April 29, 1964], No. 15879/65. Heading B6C. A device for clamping a blanket on an offset cylinder 1 comprises a rotatable shaft 3 in which is formed a longitudinal slot 6 having an inturned edge flange 7. The device also includes U-shaped reinforcing strips 9 and 10 which are secured to the ends of the blanket 8 and when placed in the slot 6 interlock with each other and the slot flange 7 directly the shaft is rotated clockwise into a position of blanket tension. The shaft 3, which is supported within a cylinder slot 2 by longitudinally disposed bearing bars 12 is rotated through a worm-gear drive carried at the end of the cylinder.
Patent GB-570338-A (GB)
Title: Wind vane
IPC: G01P13/02
Filed: 1943-09-28
Abstract: 570,338. Wind vanes. REYNOLDS, G. Sept. 28, 1943, No. 15902. [Class 97 (iii)] A wind indicator consists of a vane C secured to a cylindrical band G inscribed with compass bearings visible through an opening H in the casing. Two inscribed bands may be provided, visible through two openings at opposite sides of the casing.
Patent GB-922847-A (GB)
Title: Prismatic light transmitting panel
IPC: F21V13/02
Filed: 1960-05-05
Abstract: 922,847. Light transmitting panels. CORNING GLASS WORKS. May 5, 1960 [May 13, 1959], No. 15965/60. Drawings to Specification. Class 75 (2). [Also in Group XXIII] A light transmitting panel has refracting prisms formed on at least one surface and a small number of light diffusing particles, at least sufficient to diffuse stray light emitted at high angles, dispersed throughout the panel. The prisms may be designed to concentrate the light into preferred zones and the diffusing particles serve to produce a zone of diminished brightness between the zones of concentrated and reduced transmission. The panel may contain uniformly dispersed crystallites in a concentration of 150-1000 per c. mm. The size of the crystallites may vary from 0.01 to 0.25 mm. For example, at 1000 crystallites per c. mm., 28% may be over 0.01 mm. and 2% over 0.08 mm. and at 150 crystallites per c. mm. 53% may be over 0.01 mm. and 6% over 0.08 mm. A suitable glass contains 60% SiO 2 , 10% Al 2 O 3  10% BaO and 15% Na 2 O, the balance including 2-3% sulphate, calculated as SO 3 , for particle formation, 0.5-1.5% arsenic oxide to promote crystallite formation and 0.5-1.0% TiO 2 . Alternatively, insoluble particles, e.g. of talc may be incorporated in a glass or plastic mass from which the panels are produced. Specifications 619,084 and 879,153 are referred to.
Patent GB-770133-A (GB)
Title: Improvements in or relating to permanent magnets
IPC: H01F7/02
Filed: 1955-06-03
Abstract: 770,133. Magnets. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. June 3, 1955 [June 3, 1954], No. 16030/55. Class 35. [Also in Group XL (a)] A tubular permanent magnet for focusing electrons, e.g. in travelling wave tubes, has an internal cross-section which increases from a minimum at its centre to a maximum at its ends. The internal wall of the magnet may have a smooth surface as in Fig. 1 or stepped portions as in Fig. 2. The shape of the magnet flux flow may be modified by providing annular pole elements on the magnet ends as in Fig. 5 (not shown). In order to facilitate the mounting, of the magnet over an electronic tube, the magnet may consist of a number of elements assembled around the tube.
Patent GB-1043743-A (GB)
Title: Improvements in or relating to hair winders for use in the permanent waving of hair
IPC: A45D4/16
Filed: 1963-04-23
Abstract: 1,043,743. Hair curling appliances. A. B. PEDERSEN. April 23, 1963 [Feb. 12, 1963], No. 16037/63. Heading A4V. A hair curler comprises an outer plastic sleeve 1 sealed to an inner metal tube 5 to form a fluid-tight chamber 2 which is filled with heat-absorbing material, e.g. erythrite. The tube 5, which may be conical or cylindrical, is adapted to be heated on a corresponding pin of an electric heater as described in Specification 1,043,744, so that the curler absorbs sufficient heat to evaporate the moisture content of a hair lock subsequently wound thereon, without sleeve 1 becoming so hot as to damage the hair. The curler may be provided with a layer 19 of a heat-sensitive pigment which changes colour when the curler is ready for use, the erythrite then being molten. The sleeve 1 may be formed with projections 20, e.g. trapezoidal ridges or conical points.
Patent GB-1054511-A (GB)
IPC: B41J11/38
Filed: 1964-04-17
Abstract: 1,054,511. Typewriters. GEBR. RUTISHAUSER and P. BAUMER A.G. April 17, 1964 [April 18, 1963], No. 16052/64. Heading B6F. A stationery indexing device for feeding stationery in a typewriter to a predetermined line comprises off rotatable indexing wheel 12, Fig. 2, provided with a plurality of stops 14, driving means including gears 8, 9, 10 (Fig. 1, not shown) mounted on shafts 3a, 3b, 3c, respectively, Fig. 3, drivingly interconnecting said index wheel with a rotatable platen 4, an obturating pawl 48 adapted to co-operate with said stops 14 to prevent rotation of said indexing wheel at said predetermined line and a handle 40 operably connected to said drive means and said pawl to effect predetermined movement of said platen 4. The indexing wheel 12 has a circumference corresponding to the length of a stationery blank 57 and the stops 14 are disposed at predetermined line spacing intervals in radial slots 13 arranged at normal line spacing intervals. To feed a blank 57 into the typewriter a key 24 is depressed which displaces a lever 23 and the handle 40 is then operated until a pin 28 on the indexing wheel 12 engages a tab 27 on the lever 23. The indexing wheel is now in its starting reference position, the key 24 may now be released and the blank 57 inserted until its leading edge engages a nip formed by the platen 4 and a feeding roller. To feed the blank 57 to the first predetermined line the handle 40 is operated in the direction of the arrow in Fig. 3, displacing cam discs 29 and 38 connected to the handle by a pin 39, whereupon (a) a pawl 30 pivotally mounted on said cam disc 29 and spring urged into contact with a surface 36 of a frame 2 is released from contacting said surface 36 so as to engage a ratchet wheel 33 and drive the platen 4 and indexing wheel 12 through the intermediary of the said gears 8, 9 and 10; (b) a three-armed lever 15 engaging with a roller 43 the cam disc 38 is displaced to disable the ratchet wheel 6 on the platen 4 by lifting a roller 17, Fig. 3; and (c) a lever 44 follows the displaced pin 39 until the obturating pawl 48 mounted on the lever 44 comes to rest against a pin 3b in which position its stop nose 50 may arrest the first stop 14 on continued pivotal movement of the handle 40. On release of the handle 40 a torsion spring 41 (Fig. 5, not shown) returns the handle 40 and thereby also the cam discs 29 and 38 to the position shown in Fig. 2, whereby the surface 36 disengages the pawl 30 from contacting the ratchet wheel 33, the pin 39 displaces the lever 44 against the action of spring 45 to pivot the obturating pawl 48 out of the path of the stops 14 and a flat surface 38a of the cam disc 38 restores the lever 15 whereby the roller 17 reengages the platen ratchet wheel 6.
Patent GB-128955-A (GB)
Title: Improvements relating to Propellers applicable for Aerial or Marine Propulsion.
Inventor: MARGUERITE DE LESSEPS
IPC: B64C11/00
Filed: 1919-06-26
Abstract: 128,955. Lesseps, M. de, (Representative of Lesseps, B. de). June 27, 1918, [Convention date]. Void [Published under Sect. 91 of the Act]. Screw propellers.-The blades of a screw propeller have a smooth rear and corrugated front face. The disk ratio is unity. The blades are bounded by radial lines in parallel planes perpendicular to the axis.