baber/WOPTO huggingface dataset:
Patent GB-1360603-A (GB)
Title: Applanation tonometers
IPC: A61B3/16
Filed: 1970-07-01
Abstract: 1360603 Applanation tonometer CLEMENT CLARKE Ltd 1 July 1971 [1 July 1970] 32010/ 70 Heading A5K An applanation tonometer comprises an adjustable main spring L, Fig. 2, for controlling the applanating pressure applied to the patient's eye, at least one compensating spring M, Fig. 3, and an indicating, member P actuated by a finger wheel O for giving an indication P<SP>1</SP> of the applanating pressure. The compensating spring M has such characteristics in relation to those of the main spring L that the total pressure bears an approximately linear relationship to the indicating movement of the member P. The tonometer includes a pivot member H<SP>1</SP> carrying lever H, one arm of which supports an applanating member J, the other arm a counterweight H<SP>2</SP>, anchorages G<SP>1</SP>, K<SP>1</SP> for the free ends of the springs, M, L, and a fitting E incorporating an inspection eyepiece E<SP>1</SP> and a head-rest member E<SP>2</SP>. The member J is made of a transparent material so that the size of the flattened area of the patient's cornea may be viewed through the eyepiece E<SP>1</SP> and the applanating member itself. H comprises a block (J<SP>2</SP>), Fig. 6 (not shown) of transparent material with a plane face (J<SP>3</SP>), two opposing prisms (J<SP>4</SP>) which split the field of view into two equally, laterally displaced halves, and a transparent plate-like member (J<SP>1</SP>). Illumination is provided in the form of an electric light bulb Q tipped with a lens Q<SP>1</SP> and a light filter Q<SP>2</SP>, energized through wires R<SP>1</SP>, R<SP>2</SP> from a battery R in the base C. A further embodiment utilizes a flexible light transmitting rod (S), Fig. 8 (not shown), or preferably a bundle of such rods, provided with a lens (S<SP>1</SP>) and ultra-violet filter (S<SP>2</SP>). Automatic control of the illuminating means is achieved by using a microswitch T disposed adjacent the finger wheel.
Patent GB-338319-A (GB)
Title: Improvements in or connected with the suspension and drawing of curtains and the like
IPC: A47H11/02
Filed: 1929-10-22
Abstract: 338,319. Rigby, J. Oct. 22, 1929. Curtains, suspending.-The meeting edges of a pair of curtains e are each secured to a pair of cranked arms m extending from a runner h so as to hold the edge obliquely across the rod or rail a, as seen in plan view, to allow the edges to overlap when the curtains are drawn.
Patent GB-410177-A (GB)
Title: Improvements in or relating to operating upon soles for boots or shoes
IPC: A43D43/02
Filed: 1932-11-12
Abstract: 410,177. Channelling orthopedic boot and shoe soles. BRITISH UNITED SHOE MACHINERY CO., Ltd., Union Works, Belgrave Road, Leicester.-(Assignees of Servonnat, L. ; Chemin des Villas, Voiron, IsÞre, France.) Nov. 12, 1932, No. 32014. Convention date, Nov. 14, 1931. [Class 31 (i).] Insoles for orthopedic and like abnormal boots and shoes are channelled, grooved, or bevelled mechanically by guiding the insole 10 by a machine guide 38 that contacts with a template 18 which is of normal outline and is temporarily secured beneath the insole by tacks 20, and moves with the work past the tools 32, 34. The template may be made of any stiff sheet material and preferably has a metallic border 19. The guide finger 36 is long enough to extend under the abnormal portions 12. Adjustment of the insole relatively to the knives is effected manually by a toothed segment 42 and rack 40.
Patent GB-1135903-A (GB)
Title: 17-‡-haloalkynyl-17-ß-tetrahydropyranyloxy-steroids
Inventor: OBERSTER ARTHUR EUGENE
IPC: C07J75/00
Filed: 1964-08-06
Abstract: 1,135,903. 17α - haloethynyl - 17# - tetrahydropyranyloxy - steroids. MERCK & CO. Inc. 4 Nov., 1965 [6 Aug., 1964], No. 32027/64. Heading C2U. Novel steroids of the formula (I) (wherein X is a halogen; OTHP is a tetrahydropyranyloxy radical; R is is C 1-4  alkyl; and Z is alkylenedioxy, alkoxy or pyrrolidino; the 3(4) position being saturated when Z is alkylenedioxy and doubly bonded when Z is alkoxy or pyrrolidino) are prepared by halogenation of the corresponding 17α-ethynyl steroids by reaction with a base and a positive halogen (the starting materials being prepared by reacting the corresponding 13-C 1-4  alkyl-17α- ethynyl - 17# - hydroxy - gona - 4,9 - dien - 3 - ones with an alkylene glycol or a dioxolane, or with an alkyl orthoformate, or with pyrrolidine, and then with dihydropyran) and are converted to steroids of the Formula (II) by hydrolysis. The halogenation is preferably effected by reaction with an alkali metal in liquid ammonia and then with an N-haloacylimide, or by reaction with an alkali metal amide and a sulphonyl halide.
Patent GB-174246-A (GB)
Title: An improved hoe for agricultural purposes
IPC: A01B1/22
Filed: 1920-11-12
Abstract: 174,246. Shepherd, D. Nov. 12, 1920. Thin-blade handles; fixing.-A blade holder for a hoe having a reversible and interchange. able blade comprises a transverse bar 1 curved as shown and slotted longitudinally to receive the blade 4. The bar 1 has downwardly extending ends 3 and is connected to the handle by means of a socketed shank 10 which is cranked as shown or bent into proper shape for a push hoe. The blade is fixed by being driven tightly into the slot, or by pressing the sides 8, 9 of the holder together after inserting it.
Patent GB-321250-A (GB)
Abstract: 321,250. Jackson, L. Mellersh-, (Mathieson Alkali Works). Aug. 18, 1928. Calcium hypochlorite is obtained by chlorinating a solution or suspension of lime and a caustic alkali, e.g. caustic soda, in water, the amount of lime being in excess of that chemically equivalent to the alkali. To prevent contamination with calcium chloride, the product may be filtered and pressed to remove the maximum amount of mother liquor, or the precipitated calcium hypochlorite may be treated with sodium hypochlorite. or the chlorinated mixture may be treated with sodium . hypochlorite before separation of the calcium hypochlorite.
Patent GB-485991-A (GB)
Title: Improvements in or relating to television synchronizing systems
IPC: H04B3/00
Filed: 1936-11-23
Abstract: 485,991. Television. PHILCO RADIO & TELEVISION CORPORATION. Nov. 23, 1936, No. 32155/37. Convention date, Nov. 23, 1935. Divided out of 485,924. [Class 40 (iii)] The frequency of one set of synchronizing pulses 114 of constant frequency and duration is less than the frequency of another set 113, the duration of the pulses 114 is less than the period of the signals 113, none of the pulses are coincident, and a plurality of the pulses 113 intervene between the pulses 114. The slope of the wave front of the framing signals 114 is less than that of the line-synchronizing signals 113. For interlaced scanning the duration of the pulses 114 is less than half the period of the signals 113, and overlapping of the two kinds of signals is prevented by a circuit described in Specification 477,329 for producing a serrated framing signal, Fig. 7 (not shown). The framing signals are of greater amplitude than the line-synchronizing signals. At the end of each scanning line the picture signals 112 are so interrupted that they reach a standard level 116, and the synchronizing signals occur on the side of this level opposite to the picture signal. Specifications 485,924 and 485,989 also are referred to.
Patent GB-1444454-A (GB)
Title: Process for the preparation of secondary n-vinyl carboxylic acid amides
IPC: C07C/
Filed: 1974-07-19
Abstract: 1444454 N-vinylamides HOECHST AG 19 July 1974 [20 July 1973] 32189/74 Heading C2C N-vinylamides of formula wherein R 1  is a hydrogen atom, an alkyl radical or a cycloalkyl radical are made by heating at 300-600 C. a compound of formula where R<SP>2</SP> is an alkyl or cycloalkyl radical. Preferably heating is effected by passing the starting material through a heated tube which may be packed with filling materials of which many types are specified.
Patent GB-899447-A (GB)
Title: Improvements in and relating to diggers for harvesting tubers
IPC: A01D17/08
Filed: 1960-09-20
Abstract: 899,447. Root-crop harvesters. AEBI & CO. A.G. MASCHINENFABRIK. Sept. 20, 1960 [Sept. 24, 1959], No. 32193/60. Class 6(3). A root-crop harvester comprises two or more channel-shaped members formed by rods 11 which are arranged to ..be pivoted about axes 7 extending in the direction of motion of the machine by connecting rods 15 fastened to an eccentric 14 driven from the tractor, a share 10 being associated with each member. The share together with the channel shaped member are pivotally supported on stirrups 9 and a screw 25 fixed to the share cooperates with a nut 27 fixed to the stirrup in order to adjust the angle between the share and the stirrup so that the amplitude of the oscillations of the ends of the rods 11 remote from the share can be varied with respect to that of the share. The rods 11 are made shorter on the sides of the channel shaped members which are adjacent than on the other sides of the members with the result that the two rows of aggregate collected by the members form only one row of tubers. The land wheels 2 of the machine are adjustable in height by means of the screw 5 cooperating with the shaft 3. In modifications only the channel-shaped members are inclineable and not the shares, and the bars 11 may be coated with a hose of elastic material or may be replaced by a network or mesh of perforated sheet material.
Patent GB-1436627-A (GB)
Title: Automatic gain control circuit
IPC: H03G3/30
Filed: 1973-07-05
Abstract: 1436627 Automatic gain control MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 5 July 1973 32197/73 Heading H4R In response to a sudden change of input, an amplifier 8 in an age circuit produces two outputs varying differently in time which are rectified 18 and 12, 13 to produce D.C. control signals of which one is immediate and subsequently reduces whilst the other gradually increases, the combination controlling a variable impedance so as to exhibit negligible overshoot. As shown, a sudden increase in input level produces a corresponding output in the emitter circuit which is converted to a gradually increasing D.C. by the voltage doubler circuit 10-15 as capacitor 14 charges. The reduced impedance of the diodes 12, 13 increases the gain of the transistor 8 causing an immediate response in the collector circuit which diminishes as the gain reduces and capacitor 14 charges to the steady state value. In Fig. 5 (not shown) the impedance 22 is an FET (40) whose gate is controlled by the emitter circuit and whose source is connected to earth through a transistor (41) turned off by a monostable (61) triggered by the collector circuit to reduce overall gain during the overshoot period. The FET controls the feedback resistance of an op-amp (2).
Patent GB-650257-A (GB)
Title: Improvements in or relating to turbine apparatus
IPC: F02K1/82
Filed: 1948-12-14
Abstract: 650,257. Gas turbine plant. WESTING- HOUSE ELECTRIC INTERNATIONAL CO. Dec. 14, 1948, No. 32308. Convention date, Jan. 19. [Class 110(iii)] In a gas turbine plant for the jet-propulsion of aircraft, the nozzle and stator blades 25, 26 are carried by an inner casing wall 41 and cooling air is passed through the cavity 47 between the inner and outer casing walls 41, 40. The cavity is open at the downstream end so that the jet stream will induce a flow of atmospheric air which enters through perforations 45 in the outer wall 40. In the Specification as open to inspection under Sect. 91 a modification is described in which the cavity 47 is closed at its down stream end and the partition 43 is omitted. Pressure air then passes from the space 12 and enters the turbine stream through perforations in the inner wall 41. This subject-matter does not appear in the Specification as accepted.
Patent GB-736275-A (GB)
Title: Improvements in releasing apparatus used during childbirth
Inventor: UDDENBERG GOERAN
IPC: A61B17/44
Filed: 1953-11-24
Abstract: 736,275. Obstetric appliances. SODERBERG & CO,. AKTIEBOLAG, R. Nov. 24, 1953, No. 32550/53. Class 81 (2). A releasing apparatus for use during childbirth comprises a suction cup shell 1 with a draw grip 10, and a suction mouth 3 with a ring-shaped foot 2 of elastic material, the mouth being provided with a perforated strainer-like cover 7 as a support and suction distributer for the scalp of the child's head. The foot 2 is integral with a cup 4 partly covering the shell 1 and the grip 10 comprises a chain drawn through a suction hose 9. Several modifications of the foot 2 are described and illustrated, one in particular showing a foot arch-shaped in cross section the space within the arch being by channels in communication with the suction space of the shell 1 so that the foot also serves as a sucker. In a further embodiment the hose and chain 9, 10 are replaced by a tube joined to the shell by a ball and socket connection and acting both as draw grip and suction connection. In yet a further embodiment the draw grip and suction connection are separate and attached to the shell at locations spaced apart.
Patent GB-1475706-A (GB)
Title: Movement sensitive alarm
IPC: B62H5/20
Filed: 1974-07-23
Abstract: 1475706 Theft alarms C MULE 23 July 1974 [24 Sept 1973] 32578/74 Heading G4N A movement sensitive alarm suitable for mounting on a bicycle or a motor vehicle comprises a tamperproof enclosure 30 having mounted therein vertically an elongate conductive cylindrical housing with the lower end of a conductive pendular member 52 disposed therein, the housing and the member 52 forming part of an electrical circuit (Fig. 6 not shown) so that an alarm signal is generated when the member 52 moves to contact the housing. In a bicycle, the enclosure 30 is movable from a normal rest position above the rear (or front) wheel to a position below the wheel when the bicycle is parked and an alarm set switch is closed by operation of a key. The pendulum switch is closed momentarily by a tilting or abrupt movement of the vehicle and a relay is energized to cause the audible alarm generated to remain latched. An adjustable bracket may be provided (Fig. 7 not shown) to maintain the enclosure and hence the housing vertical on an uneven surface. Bars linking the enclosure to the vehicle frame may include wires which when cut initiate an alarm. An over-ride switch may be provided to cause an alarm when pressed. In a motor vehicle, the pendulum switch may be arranged to be closed in response to a person sitting on the driver's seat.
Patent GB-534723-A (GB)
Title: Improvements in or relating to receivers for frequency or phase modulated oscillations
IPC: H03G11/06
Filed: 1939-12-20
Abstract: 534,723. Wireless receiving systems. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE. Dec. 20, 1939, No. 32618. Convention date, Dec. 20, 1938. [Class 40 (v)] In a receiver for frequency or phase modulated waves, any amplitude modulation is compensated for by rectifying the received energy to obtain such amplitude modulation frequencies, separating these from the carrier frequency by a low-pass filter with negligible resistance, and applying them as negative feed-back to the grid of a previous valve. Part of the output from the intermediate frequency valve Z and filter B2 passes to a stage ST for converting the frequency modulated waves into amplitude modulated currents in the usual manner, and part passes to a pentode D, the cathode-anode path of which acts as a rectifier. The direct-current voltage on the load resistance W is taken off over filter R, C for A.V.C., and the amplitude-modulation frequencies are applied to the first grid of the pentode, the first screen grid acting as anode. The amplified currents are applied via the low-pass filter as negative feed-back direct to the grid of valve Z without the interposition of other circuit elements such as resistances which would increase the time constant. A transformer may be arranged between the filter and the grid of valve Z.
Patent GB-449504-A (GB)
Title: Improvements in or relating to bicycle transmission drives
IPC: B62M9/08
Filed: 1935-11-25
Abstract: 449,504. Chain-wheels. DEUREN, P. VAN, 361, Avenue de Tervueren, Woluwe St. Pierre, Brussels. Nov. 25, 1935, Nos. 32680 and 32681. Convention dates, Dec. 4, 1934 and June 15, 1935. Drawings to Specification. [Class 80 (i)] [See also Group XXXI] In pedal-crank driving-mechanism for bicycles, the chain-wheel to which the pedal cranks are attached is of elongated form comprising two half circles joined by straight or approximately straight parts. The wheel is strengthened by an inner circular rim tangential to the toothed ring at the ends of the shortest diameter.
Patent GB-1191698-A (GB)
Title: Improvements in or relating to Electro-Magnetically Operable Contactors
Inventor: MONIER MAURICE
IPC: H02B1/04
Filed: 1967-07-17
Abstract: 1,191,698. Electromagnetic contactors. CIE ELECTRO-MECANIQUE. 17 July, 1967 [27 July, 1966], No. 32682/67. Heading H1N. Auxiliary contact units are detachably mounted on a contactor casing enclosing the main contacts. A carrier 8 attached to the contactor armature 7 supports a plurality of contact bridges 10 which co-operate with fixed contacts 11. Auxiliary contact units 15 have divided casing parts with legs 22 with projections which engage surfaces if of the contactor casing 1. The auxiliary contact units may have contact bridges 18 (Fig. 1) on a carrier 17 urged by a spring 19 and arranged to operate with the main contacts or the units may be bridges 25 (Fig. 5) movable by a pushbutton 27 against the bias of a spring 26 to bridge main contacts 11 in series with the contactor coil. Fig. 8 shows an alternative method of securing the auxiliary contact units with a pointed screw li.
Patent GB-1190144-A (GB)
Title: Turning Device for Turning Workpieces to a Polygonal Cross-Section
Inventor: LICHIUS ALBERT
IPC: B23Q35/10
Filed: 1968-07-09
Abstract: 1,190,144. Turning polygon cross-section workpieces. WERKZEUGMASCHINENFABRIK GILDEMEISTER & COMP. A.G. 9 July, 1968 [21 July, 1967], No. 32775/68. Heading B3T. A device for turning polygonal cross-section workpieces comprises two levers 3 pivotally mounted in a housing 1 on a pin 2 whose axis is perpendicular to the rotational axis of the workpiece 10, a cutting tool 4 mounted at one end of each lever and a roller 5 mounted at each other end, each roller engaging a respective cam 7 secured to a rotary drive shaft 8 in the housing 1. The rotation of cams 7 with the shaft 8 effects a scissor-like movement of the levers and a consequential radial reciprocation of the cutting tools. Biasing means 6 is provided to retain the rollers in contact with the cams, which may be spring actuated (as shown), or alternatively hydraulically or pneumatically actuated. The cams rotate at the same speed as the workpiece and each have a number of lobes equal to half the number of sides of the polygon to be machined.
Patent GB-405598-A (GB)
Title: Method of determining the concentration of mixtures of substances
IPC: G01N27/22
Filed: 1931-11-28
Abstract: The concentration of one component in a mixture is determined by measuring the difference in the specific inductive capacities of a pure solvent and the solution obtained by extracting the component to be measured with that solvent.  Preferably the apparatus used comprises two oscillating circuits, each containing identical measuring condensers capable of being filled with a gas or liquid, which are adjusted to oscillate at the same frequency when the condensers are filled with the same substance. The condensers are then filled with the solvent and solution respectively and the resulting frequency difference measured, e.g. by an arrangement similar to that used in superheterodyne wireless receiving circuits, by thermo-elements, by galvanometers with rectifiers, alternating current voltmeters, &c.  The heterodyne effect may also be amplified and employed to actuate relays, e.g. to operate recording devices, acoustic or optical signalling apparatus or automatic regulating devices.  For exact measurements, the condensers are kept at constant temperature.  If the conductivity of the substances affects the accuracy of the capacity variations, conductivity measurements may be made by using the condensers as conductivity cells, disconnected from the oscillating circuits, the two condensers and two oscillating circuits forming the arms of a Wheatstone bridge.  According to examples (1) purity tests for distilling fractions are carried out by adjusting the oscillators to the same frequency when the condensers are empty.  One condenser is filled with the pure liquid desired, and the distillate arranged to flow through the second condenser.  When the pure substance distils over, the frequency difference is zero. (2).  The variation of s.i.c. with concentration is determined empirically and the results used to determine absorption equilibria, one condenser being filled with solvent and the other with the mixture which has been treated with absorbent.  Rates of diffusion or solution and the degree of saturation may be similarly determined. Also the determination of the fatty contents of liquid and solid substances, analysis of sewages, &c. may be carried out by a similar method.  (4) The moisture content of decomposable substances or bodies having a large surface area, e.g., grain, meal products, wood, mortar, tobacco, explosives, &c. may be measured by extracting the water by means of dioxane and comparing its s.i.c. with that of the pure solvent.  (5).  The concentration of one component of a gas mixture such as an inflammable or noxious gas may be measured by comparing the untreated gas with the mixture after treatment with a suitable adsorbent or reagent to remove the required component.
Patent GB-283726-A (GB)
Title: Improved construction of locker desk for school and similar use
IPC: A47B39/00
Filed: 1926-12-31
Abstract: 283,726. Dickinson, R. Dec. 31, 1926. School desks. -In a school desk with a side locker c, the locker is made long enough to extend from from the front of the desk a to the back of the seat e. The locker is mounted on an understructure f, g, f<2>, g<2>. The table a is hinged to the locker, and turns down against it; it is normally supported by a hinged strut d. The seat e is preferably a tip-up seat.
Patent GB-444658-A (GB)
Title: Improvements in or relating to apparatus for packing powders and other goods in paper or other similar wrappers
IPC: B65B1/02
Filed: 1934-11-16
Abstract: 444,658. Wrapping-machines. NAYLOR, W. H., 20, The Drive, Adel, Leeds, and DAY & SONS, Ltd., J., Beeston Royds Works, Leeds. Nov. 16, 1934., No. 33037. [Class 94 (i)] Powders are enclosed in wrappers to form flat packets. The wrappers are fed in succession on to a platform 11 having a slot 12 through which they are forced by a blade 13 to form a trough having unequal sides 14, 15. Grippers 16, 17 maintain the edges in position on the blades while the trough of paper is lowered between grippers 19, 20, which close upon the ends. A number of pairs of grippers are mounted on an intermittently rotating platform 26, which carries them to a succession of stations. At the filling station, a delivery funnel 27 is swung to engage the higher upstanding portion 15 of the wrapper, and delivers a charge of powder into the trough. At the next two positions, successive longitudinal folds are made in the upper part of the wrapper by any known mechanism. At the next station, the grippers rotate about their shanks 18 to fold the ends of the trough transversely, and, finally, a gripper lifts the folded packet off the grippers 19, 20 and transfers the packet into a horizontal position beneath a pressing plate.