baber/WOPTO huggingface dataset:
Patent GB-1047301-A (GB)
IPC: H01S5/00
Abstract: 1,047,301. Semiconductor devices. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. March 19, 1964 [March 22, 1963], No. 11687/64. Heading H1K. [Also in Division H3] An injection maser comprises a semiconductor body with a PN junction such that stimulated emission can produce a beam parallel to the junction and the impurity concentration and/or basic composition of the body on each side of the junction is such that the refractive index decreases by at least 10#m<SP>2</SP>/a<SP>2</SP> per cent over at least part of the distance ¢#m to 30# m  from the junction. #m is the wavelengths of the recombination radiation and " a " is the distance from the junction to edge of the region concerned. This decrease of the refractive index reduces diffraction and other radiation losses. In one example zinc is diffused from the vapour or an alloy of gallium and zinc, into a 50Á thick N-type gallium arsenide wafer 3 having 2 x 10<SP>18</SP> tellurium atoms per c.c., to form a 10Á P-type layer 2 (Fig. 6) having 2 x 10<SP>19</SP> zinc atoms per c.c. It is shown that at this stage, the construction would satisfy the requirements for a change of refractive index on the N side of the junction but not on the P side. A filament of tin and 10% zinc is therefore alloyed to P-type region 2 producing a 5Á P-type region 7 having 2 x 10<SP>19</SP> impurity atoms per c.c.; region 9 consists of resolidified material. Conditional requirements involving impurity concentration, impurity gradients, effective mass, " a " and #m are given whereby the refractive index requirement is satisfied on both sides of the junction. The semi-conductor body may be tin soldered to a gold plated tantalum support 13, and the end faces 15 are ground flat, and coated with gold to provide one opaque and one semi-transparent reflecting layer faces. A further embodiment describes the production of such a semi-conductor body by vapour deposition. A plurality of separately heated crucibles 25 (Fig. 8) containing separate sources of gallium, arsenic, zinc and tellurium and separated from each other by shield 27, are arranged below a heated N-type gallium arsenide wafer 20 in an evacuated enclosure 28. A series of layers are deposited by first heating the gallium, arsenic and tellurium sources, then cooling the tellurium and heating the zinc; the result in a PN junction with controlled increasing impurity concentration on each side as distance from the junction increases. In a further embodiment, a further crucible containing phosphorous is added and a semi-conductor with a PN junction region of the desired type is produced by utilizing change in composition of the basic semi-conductor material; immediately adjacent the PN junction the material is gallium arsenide with no gallium phosphide but from a distance of approximately 1Á, 2 mol per cent of gallium phosphide is present. A number of maser devices may be produced by cutting a wafer produced as above. Other semi-conductor materials may be used such as indium antimonide passing into a mixed crystal of indium antimonide and indium arsenide and the PN junction may comprise an intrinsic layer.
Patent GB-1050269-A (GB)
IPC: F28D7/02
Abstract: 1,050,269. Laboratory distillation apparatus. P. POGACAR. Dec. 11, 1963 [Dec. 15, 1962], No. 48919/63. Heading BIB. [Also in Division F4] In a laboratory distillation apparatus comprising a boiling flask 1 and a condenser tube 3, the vapour cooled by passing cooling-fluid through an elastic-walled hose 6 wound helically around the condsenser tube 3. The hose material may contain a metal powder 11 to improve its thermal conductivity. The hose is detachably secured by clips 9 and/or 10 to the tube 3. Hence by removing the hose the condenser may be converted for air cooling as may become necessary in the late stages of the distillation process. The Specification also mentions applications in which the flexible hose is wound around a boiling flask, beaker, cannister, barrel or other vessel for heating or thawing-out purposes or around a chemical reaction vessel and supplying heating or cooling fluid to the hose as necessary to control the reaction.
Patent GB-1052854-A (GB)
IPC: C22C27/02
Abstract: 1052854 Super-conductor's WESTINGHOUSE ELECTRIC CORPORATION 9 April 1965 [30 April 1964] 15185/65 Headings H1A and A4D A super-conductor is formed by cold-rolling, to reduce its thickness by at least 96%, an alloy composed of 10 to 75% by weight of zirconium, 0À5 to 10% molybdenum and one balance niobium. The critical super-conductive density of the conductor is improved by heat-treatment at above 600C for from 15 minutes to 4 hours, after the cold-rolling.
Patent GB-1054685-A (GB)
IPC: C07B61/00
Abstract: 1,054,685. #-Cyanoethyl ethers and thioethers. BADISCHE ANILIN- & SODAFABRIK A.G. April 10, 1964 [April 20, 1963]. No. 14855/64. Heading C2C. #-Cyanoethyl ethers and thioethers of monohydric or polyhydric alcohols, phenols or thiols are prepared continuously by reacting monohydric or polyhydric alcohols, phenols or thiols with stoichiometric or substantially stoichiometric amounts of acrylonitrile in the liquid phase in at least two separate containers arranged in series, with intense stirring and simultaneous supply of the reactants to the first reactor, the residence period in the first reactor being such that at the most 80% of the total conversion takes place therein and the reaction being completed in the last reactor at a higher temperature than in the first reactor. The intense mixing may be achieved by recirculation of the liquid phase. An excess of alcoholic, phenolic or thiolic reactant may be supplied to the first reactor and a further amount of acylonitrile to balance this excess may be fed to the second reactor. The reaction may be conducted both in the presence of an alkaline catalyst and in the presence of a polymerization inhibitor. Specified products include #-cyanoethyl methyl ether, #-cyanoethyl tertiary-butyl ether, tri-#-cyanoethoxypropane- (1,2,3), tetra - (# - cyanoethoxymethyl) - methane, di - # -cyanoethoxyethane - (1,2), di- (#<SP>1</SP>-cyanoethyl) diethyl ether, #-cyanoethyl phenyl ether, #-cyanoethyl benzyl ether, #- cyanoethyl cyclohexyl ether, 1,4-(di-#-cyanoethoxymethyl) - cyclohexane, # - cyanoethyl allyl ether, #-cyanoethyl propargyl ether, di-#- cyanoethoxy - (1,4) - butene - (2), di - #- cyanoethoxybutyne - (2), 4 - amino - 1 - #- cyanoethoxybutane, di- # cyanoethyl ether and #-cyanoethyl dodecyl thioether.
Patent GB-1225181-A (GB)
IPC: F24H1/18
Filed: 1968-02-16
Abstract: 1,225,181. Steam treatment; inhalers. S. A. POPEIL. 16 Feb., 1968 [2 Jan., 1968], No. 7761/68. Addition to 1,225,182. Headings A5R and AST. [Also in Division H5] A steam chest 10 for heating hair curlers is modified for use as a facial steam bath or inhaler by provision of a tubular face piece 120. The steam chest consists of a box-like base with a hinged lid, the base enclosing a steam generating compartment surrounded by a water reservoir 65, which communicate with each other via a water metering slot 66. A perforated tray 50 is mounted on top of the steam compartment with its edges abutting the walls 58 of the chest. Within the compartment is an electrical resistance heater 94 (see Division H5) consisting of two interleaved U-shaped electrodes. The face piece 20 is positioned within the chest, on top of the perforated tray, and has a cross-sectional area that substantially surrounds the top of the steam compartment so that steam generated therein is conducted to the face placed at the outer, suitably contoured end of the tube. The face piece may be formed from a single sheet of flexible material bent around into a tube, the adjoining ends then being secured together; it may be wrapped around the closed chest when not in use, thereby acting as a fastening device to keep the lid closed (see Fig. 30, not shown). Preferably there is a permeable pad (e.g. of cellular polyurethane) placed inside the face piece and seated on the perforated tray, to diffuse the current of steam. The pad may be charged with a volatile medicament or inhalant which is dispersed in and inhaled with the steam. (For Figures see next page)
Patent GB-1226559-A (GB)
IPC: H04N1/62
Filed: 1968-03-18
Abstract: 1,226,559. Copying by scanning. DR. ING. RUDOLF HELL. 18 March, 1968 [17 March, 1967], No. 12836/68. Heading H4F. Parts of different pictures are copied electronically during photo-electric scanning of the pictures using a mask which is scanned synchronously and in register with the pictures, the mask having differently coloured areas which correspond to the respective areas of the pictures to be copied and cause the appropriate picture signals to be connected to the recording device on each change of colour during scanning. As shown, portions I to IV of pictures 1 to 4 respectively are to be copies in the reproduction 9 and the mask 11 is divided similarly into white, red, green and black portions. The pictures 1 to 4 are scanned synchronously along successive lines in conventional manner by devices 5 to 8, colour separation filters being included if the pictures are coloured. The mask 11 is scanned synchronously by a device 12, the beam from the scanning path being split into two paths including a red and a green filter 15, 16 respectively, by mirrors 13, 14. The outputs of the corresponding photo-cells or multipliers 17, 18 are supplied to amplitude discriminators 19, 20 respectively, which produce binary outputs in accordance with the colour scanned on the mask 11. Thus, when white is scanned the outputs of filters 15, 16 are equal and the binary output is 11, red produces output 10, green produces output 01, and black produces output 00. The white area may be replaced by grey so that the filter outputs are equalized. These binary outputs selectively operate relays R, G whose contacts r and g 1 , g 2  are connected so that the required picture portion is reproduced at 9 via a colour or tone correction circuit 21. The beam in the scanning device 12 may be divided into three paths in which case the mask 11 will be divided into eight portions with corresponding colours and eight different picture portions may be copied. A fixed signal from a signal generator can also be connected to the recording device, for example, to record at one position writing, or to produce a neutral background or to introduce colour correction.
Patent GB-1228120-A (GB)
IPC: F16G15/02
Filed: 1970-01-09
Abstract: 1,228,120. Chain couplings. BECKERPRUNTE G.m.b.H. 9 Jan., 1970 [11 Jan., 1969], No. 1191/70. Heading F2Q. A connecting link for an oval or round link chain comprises two identical generally U- shaped halves interfitted together so that the toothed outer face of a limb 2 of each half interengages the toothed inner face of a limb 1 of the other half, a gap 5 between the two innerlimbs 2 receiving a latch member 6 or 17 to prevent relative movement between the halves, and the width A of one inner limb 2 plus the width B of the gap 5 slightly exceeding the thickness of the chain links to be joined. A rounded nose 12 on the end of each limb 1 is a tight machined fit in a recess 13 at the base of each limb 2. The nose may extend normal to the plane of the link, as shown, or parallel to said plane (Fig. 3, not shown). The angle α between the longitudinal axis of the link and the planes of the toothed faces is less than the friction angle of the engaged surfaces. The latch member 6 is a headless bolt engaging screwthreaded recesses 14 in the limbs 2 and retained by a locking wire 16. Alternatively a block 17 retained by a cotter pin 18 may be used.
Patent GB-1228149-A (GB)
IPC: G01N23/203
Filed: 1967-08-08
Abstract: 1,228,149. Photo-electric coating thickness measurement. SEL-REX (U.K.) Ltd. Aug. 1, 1968 [Aug. 8, 1967], No. 36374/67. Heading G1A. [Also in Division H5] In apparatus for measuring the thickness of a coating on a specimen by #-particle backscatter analysis, means are provided for moving the source from a first position in which the specimen is isolated from the source to a second in which the specimen is exposed to the source. The apparatus comprises a rectangular aluminium casing having plastics viewing windows in its side walls. Inside the casing is located a Geiger-Mueller counter 40 mounted directly beneath a frustoconical aperture 22 in the top wall of the casing. Rotatable on the top wall is a platen 25 having eight frusto-conical portions, seven of which are formed with apertures 26, which can each continue the radiation path formed by aperture 22, when aligned with the latter. The apertures 26 are of differing sizes, and of circular and rectangular shapes, to cope with differently shaped samples. The edge of the platen 25 is provided with sixteen notches 36 which are in turn engageable by ball catch 38 so as to locate, on rotation of the platen, a particular shaped aperture, a blank frustoconical portion 30 or a solid portion of platen between apertures, in alignment with the aperture 22. Operation. A specimen to be investigated is placed over the chosen aperture 26 which has been aligned with aperture 22 and is held in position by a weighted or spring-loaded pin 76. Next, one of the #-emitters 66 normally located within tubular shields 44 is brought into the position required beneath the specimen (as shown for left hand source arrangement in Fig. 3) by pushing the rod 62 by which it is carried through tube 44 and locking it in position by grub screw 61. The tube 44 itself and the ball joint 42, by which the tube is mounted in the side wall 11, are themselves locked in position by grub screws 51 and 53 respectively. A count is then taken to give an analog or digital readout of the coating thickness. After measurements are completed, the source is retracted into the cavity 55 in tube 44 and the rod 62 locked in position by clipping over it a plastics sleeve 70. The tube 44 is provided with a pivoted cap 58 which is swivelled open by rotation of the tube within ball 42 before pushing the source into the irradiation position and closed after the source has been retracted after measurements. The apparatus may be calibrated using two samples of known thickness to obtain a straight line calibration graph. The apparatus may have a plastics top cover to provide some #-ray absorption.
Patent GB-1228823-A (GB)
IPC: C07C2/36
Filed: 1968-07-08
Abstract: 1,228,823. Oligomerisation catalysts. FARBWERKE HOECHST A.G. 8 July, 1968 [6 July, 1967], No. 32435/68. Heading B1E. [Also in Division C5] (1) (a) a nickel or cobalt compound having the formula: (PR 3 ) 2 MX 2  where M=Ni or Co X=Cl, Br or I R is a C 1 -C 8  alkyl, C 6 -C 11  cycloalkyl or aryl, a piperidyl, or a di(C 1 -C 5 alkyl) amino group. or (b) a nickel compound of the formula: wherein X=Cl, Br or I R' is an alkylene or arylene group R" is a C 1 -C 6  alkyl or C 6 -C 11  aryl group or (c) a phosphine- and water-free complex of Ni(II) selected from bis(acetylacetonato)Ni(II), [NR 4 ] [NiX 3 ] and [NR 4 ] 2  [NiX 4 ] where R is an alkyl group and X is Cl, Br or I; and (2) Al Cl 3 , AlBr 3  or AlI 3 ; and (3), where component 1(c) is used, a compound PR 3  R being as defined under (1) (a), where the molar ratio of Al:metal is greater than 3 and. Al:P greater than 1. Preferred catalyst components are (1) NiCl 2  (Ph 3 P) 2 , Co Cl 2  (Ph 3 P) 2 , bis(acetoacetyl) Ni(II) and NMe 4  Cl 3  Ni(II), (2) Al Cl 3 , (3) Ph 3 P, Bu n P and (Pip) 3 P. A tertiary aliphatic amine may also be present. The catalyst may be employed in an inert solvent or dispersion medium such as chlorobenzene.
Patent GB-1229089-A (GB)
IPC: B24B27/04
Filed: 1969-12-09
Abstract: 1,229,089. Grinding. G. GAZUIT. 9 Dec., 1969 [1 Aug., 1969], No. 60027/69. Heading B3D. A grinding wheel is mounted for horizontal translatory movement, without use of slideways, by being suspended from an arm rotatable in the horizontal plane about a vertical support. A bracket pivots about a vertical axis on the end of the arm and is linked to the support to preserve the orientation of the grinding wheel axis throughout translation. The wheel is mounted on a beam pivoted about a horizontal axis to the bracket and swung to produce the rectilinear wheel motion during arcuate movement of the bracket An upright mounted on the machine frame H for rotation about vertical axis A carries a horizontal radial arm I to the outer end of which a bracket J is mounted for pivoting about a vertical axis B. A link K connects a point B 1  of the bracket to a point A 1  stationary with respect to the machine frame to maintain the orientation of the bracket constant during pivoting of the arm I. A beam L connected to the bracket by a horizontal pivot pin C has its upper end pivoted at E to the rod of an actuator V 1  pivotally mounted to the bracket; pivoted at D to the lower end of the beam is an arm M supporting at its outer end the shaft F of a grinding wheel N; an actuator V 2  is connected between the arm and a point on the bracket J. Pivoting of the radial arm I is effected by actuators V 4 , V 5  anchored to the machine frame, whereby the grinding wheel is horizontally translated. To convert the arcuate translation to a rectilinear one, the actuator V 1  is hydrostatically operated by an actuator V 3  carried by the radial arm I and having its rod engaging a cam rigid with the machine frame. The height of the translation is adjusted by operation of the actuator V 2 . The point A 1  to which the link K is connected may be carried by the machine frame by a lever AA 1  rotatably mounted about the rotational axis A of the upright and retained in desired position by an actuator V 6  reacting against the machine frame. By this arrangement the plane of the grinding wheel can be perpendicular to or oblique to the direction of translation.
Patent GB-1231258-A (GB)
IPC: H04N1/032
Filed: 1968-09-20
Abstract: 1,231,258. Facsimile apparatus. MUIRHEAD Ltd. 10 July, 1969 [20 Sept., 1968], No. 44847/68. Heading H4F. The wear on the stylus 16 of a facsimile receiver is distributed along the length of a contact member 20 of the stylus by arranging that the straight writing edge 2, which forms a scanned pinch spot with the contact member 20 of the stylus for applying an electrical signal to a sensitive recording sheet advanced through the pinch spot, is slightly inclined relative to the track 1 along which the carriage 3 bearing the stylus 16 is reciprocated. In the embodiment alternate lines are scanned by different carriages 3 reciprocating in anti-phase on parallel tracks 1. Abutments 4 at the ends of each track 1 strike nylon blocks 11, 12 on push rods mounted on the carriages 3 thereby causing the styli to be pivoted by cam surfaces so that only the stylus moving in the scanning direction is urged towards the writing edge 2, the stylus on the returning carriage being held clear of the writing edge 2. Because the wear on the contact member 20 is distributed it can be of a relatively soft material such as stainless steel.
Patent GB-1233409-A (GB)
IPC: H02P3/18
Filed: 1968-10-03
Abstract: 1,233,409. Control of A.C. motors; battery charging. TOKYO SHIBAURA ELECTRIC CO. Ltd. 3 Oct., 1968 [3 Oct., 1967; 29 Dec., 1967; 2 July, 1968], No. 46988/68. Headings H2H and H2J. An electric motor control circuit associated with a battery or D.C. trolley wire 1 has a series circuit comprising a thyristor chopper 2, a choke 3, motor field 4 and a thyristor commutator 5, and includes means for establishing regenerative braking by reversing the firing sequence of the commutator and effectively reversing the supply connections. As shown in Fig. 1, this is effected by a change-over switch 22 and diode 25. The driving circuit is 1, 2, 3, 4, 5, 24 and 21 and the braking circuit is 1, 25, 3, 4, 5, 23 and 20. Triggering pulses for the commutator are supplied from an unspecified circuit 19 in response to voltages from a motordriven rotor 17 and a "speed detector" 18. The driving current is regulated by chopper 2 and during braking this is repeatedly switched on to provide a short-circuit when the braking current reaches a lower value (Is, Fig. 2, not shown) and off when a higher value (Im) is regained. In alternative arrangements the change-over switch 22 is replaced by thyristor switches and diodes, or half of the commutator thyristors are turned off to interrupt the driving circuit while another thyristor is turned on to complete the braking circuit. A transistor Schmidt trigger circuit is described for switching the chopper 2 on and off in response to the braking current. Fig. 6 shows a battery charging arrangement in which an external single or three-phase A.C. supply at 46, 47, 48 is connected through diodes 29, 30, 31 and thyristor 32 to the chopper 2 and the battery 1, the circuit being completed through choke 3, field 4 and thyristors 7, 8, 9 of the commutator, 10, 11, 12 being turned off. The motor is disconnected at switch 43. The chopper regulates the charging current and when it is turned off a free-wheeling circuit through a diode 50 (44 and 45 are closed) dissipates the energy in choke 3 and field 4. In an alternative arrangement (Fig. 7, not shown) the charging rate is adjusted by varying the firing angle of the thyristors in the commutator, and/ or the chopper 2 is used which in this case diverts the current from the battery when it is on.
Patent GB-1233508-A (GB)
IPC: F16H29/04
Filed: 1969-06-03
Abstract: 1,233,508. Variable-speed gear; ratchet gear; eccentrics. J. R. BROOKS. 3 June, 1969, No. 28115/69. Headings F2D, F2K and F2Q. A ratchet gear comprises an input driven eccentric 46 which reciprocates followers 64 each having a roller 88 engaging a curved forked extension 60, 62 of one of a number of oneway roller clutches 56 which are thus oscillated to drive an output shaft 12. As shown, a variable speed ratchet gear includes a variablethrow driving eccentric, connected to an input shaft 10, comprising two pairs of superposed driving and counterweight eccentrics 42, 46 and 40, 44, the relative orientation of which is varied by indicator adjuster sleeves 26, 34 and locknut 36 to change the speed ratio, the counterweight eccentric disc 44 additionally serving as a service replacement for the driving eccentric by simply interchanging the discs 44, 46 when wear takes place on disc 46. The outer eccentric disc 46 is formed with a ball track 76 engaged by balls 74 seated in the ends 72 of the followers 64 which are thus reciprocated via their side guide tracks 70 on a fixed centre plate 90 to oscillate the one-way roller clutches 56 as above. In Fig. 6 (not shown), the ratio change adjuster sleeve (26<SP>1</SP>) of the eccentrics is connected via a torsion spring (132) to the input shaft 10 whereby the ratio is varied automatically according to torque load, a manually screwed adjuster (126) axially changing the spring tension to vary its automatic ratio-change to torque-load effect, the arrangement providing an automatic overload safety feature when the eccentrics are moved to the neutral point at which the input shaft 10 rotates freely with the output shaft 12 stationary. In Figs. 10 to 15 (not shown) a single eccentric reciprocated follower (178) oscillates two diametrically opposed arms (64) of two oneway roller clutches on the driven shaft 12. In Figs. 7 and 8 (not shown) a simplified fixed reduction gear is effected by welding the driving eccentric (46<SP>1</SP>) to the input shaft 10.