baber/WOPTO huggingface dataset:
Patent GB-945617-A (GB)
Title: Improvements in triangular waveform voltage generators
IPC: H03K3/78
Filed: 1960-06-09
Abstract: 945,617. Valve triangular wave-generating circuits. BRANSON INSTRUMENTS Inc. June 9, 1960 [June 9, 1959], No. 29201/62. Divided out of 945,616. Heading H3P. A triangular waveform is generated by a Miller-transitron oscillator, the anode voltage being controlled by a bootstrap cathode follower. As shown, valve 1 has positive feedback between screen and suppressor grids via a capacitor 11 so that the stage behaves as a free-running transitron or phantaetron oscillator. The fall in anode voltage when most of the cathode current flows to the anode is linearized by feedback via the Miller capacitor 10. When the anode voltage reaches a critical value dependent on the setting of resistor 14, the anode current becomes cut-off by the suppresser grid voltage. Capacitor 10 recharges via resistor 7, the rise in anode voltage being fed to the cathode follower 16 so that the voltage at the junction of resistors 7, 8 is increased with the result that a linear rise in anode voltage is obtained. If resistor 7 is set to half the value of resistor 13, the rise and decay times of the anode voltage are equal. The frequency is adjusted by capacitor 10 and the amplitude by resistor 14. Keying low frequency oscillators.-Valve 17 normally prevents valve 1 oscillating except when a negative pulse 30 is present on the grid. The duration of pulse 30 is greater than that of one cycle from valve 1 hence the output 31 consists of several cycles of triangular waveform.
Patent GB-1223957-A (GB)
Title: Drilling apparatus
Inventor: FERGUSON CHARLES WYNNE
IPC: B23B39/22
Filed: 1969-06-10
Abstract: 1,223,957. Drilling machines; grinding. LIBBEY OWENS-FORD CO. 10 June, 1969, No. 29261/69. Headings B3C and B3D. A cycle of operations in a machine for drilling a plurality of holes at exact predetermined locations in a sheet of glass S by tubular drills 106 with cutting ends of fine diamond powder in a suitable matrix, is initiated when the sheet S is placed on a protective layer 47 carried by a base member 43 of a drill jig 21, so that the edge contacts locator means 65, 66 and 67 and puts control means 75, 76 and 77 in a circuit-closed condition. This causes valves (145) and (151), Fig. 12 (not shown), to direct pressure to cylinders 142 and 112, respectively, thereby lowering clamping devices 135 as first drilling means 104 are moved upwardly to perform the first phase of the drilling operation. When the desired depth has been reached. Fig. 10 (not shown), individual control means 155 are engaged to produce reversal of valves (151) so that drills 104 are retracted. Control means 155 causes the opening of the "series" circuit through control means 75, 76 and 77 which circuit would otherwise be maintained throughout the entire drilling operation. Also, the control means 155 causes operation of valves (181) to produce a downward stroke of second drilling means 105. As the spindles 110 are lowered from the position of Fig. 7, leg 197 of each actuator element 183 is removed from engagement with finger 212 of control means 176, 177 and 178. At this time there is no active circuit to these series control means 75, 76 and 77. However, when the drills 106 complete the formation of holes in sheet S. the completion of circuits is produced by circuits through the individual control elements 175. Each control element causes its drilling tool 105 to retract after which a circuit is completed through the control means 176, 177 and 178. At the upper limit of spindles 110, when all the legs 197 engage fingers 212, the valves (145) are reversed to lift the clamping devices 135, after which valves 215 are made operable to actuate adjustably mounted ejector devices 99. The discs 222 of these devices are moved with sufficient thrust to move the sheet from the drill jig 21 and cause it to drop on to the conveyer belt 16. The line circuit to "series" control means 75, 76 and 77 is re-established, the line circuit to "series" control means 176, 177 and 178 is again opened and valve 215 is actuated to retract the discs 222 of ejector devices 99. To prevent excessive movement of an upper drill 106 in the advent of a failure of control means 175, a nylon washer 203 mounted on a stationary block 128 and lock-nuts 204 and 205 positioned on spindle shaft 124. Each pair of drills is mounted in a housing 26 which is adjustably positioned on a base structure 36.
Patent GB-1473141-A (GB)
IPC: H02P8/16
Filed: 1974-07-02
Abstract: 1473141 Rapidly switching inductive loads CARL ZEISS JENA VEB 2 July 1974 [9 July 1973] 29266/74 Heading H3T [Also in Division H2] A circuit for rapidly switching the current in an inductor 5, e.g. the coil of a stepping motor, comprises a capacitor 1 charged through a resistor 2 to a relatively high voltage U 1 , a switch 3 for discharging the capacitor through the inductor and a diode 4 connected to a lower voltage source U 2  to sustain the coil current when the capacitor has discharged to this level, a thyristor 6 being rendered conductive by the back emf during switch-off to short circuit the resistor so that the capacitor is rapidly recharged.
Patent GB-651638-A (GB)
Title: Improvements in or relating to paper bags and other similar containers
IPC: B65D33/02
Filed: 1948-11-11
Abstract: 651,638. Paper or like bags. LEMON, H. L., and MACKINTOSH & SONS, Ltd., J. Nov. 11, 1948, No. 29316. [Class 94(ii)]  A stiffener for paper bags comprising a base 2 shaped to correspond to the floor of the bag, and at least two upwardly extending wall members 3 adapted to engage against opposed walls of the bag, is characterized in that the corners 8 of the base and the upper and lower ends 5 and 7 respectively of the side edges of the wall members are rounded.
Patent GB-402230-A (GB)
Title: Improvements in and connected with railway, steamboat, car, bus, and other tickets
IPC: B42D15/00
Filed: 1932-10-20
Abstract: 402,230. Railway tickets &c. DALGLISH, W., 124, Terregles Avenue, Maxwell Park, Glasgow. Oct. 20, 1932, No. 29320. [Class 73.] A railway &c. ticket is formed of a strip of thin cardboard folded into two parts A, B which are lightly secured by paste or an adhesive strip, one of the parts having a thumb nail recess C to enable the parts to be readily opened. Advertisements may be printed on the inner surfaces of the parts.
Patent GB-233266-A (GB)
Title: Improvements in or relating to perpetual date indicators
IPC: G09D3/10
Filed: 1924-12-06
Abstract: 233,266. Jakobsen, J. Dec. 6, 1924. Date indicators.- A perpetual date indicator comprises a band 2 mounted on rollers 3, 4 and having the dates for a vear and the names of the days of the week repeated continuously in two parallel columns on the same face, one date only being visible through an aperture 6 in a plate 5. An aperture 7 in the plate 5 sufficiently long to expose seven day-names has guides 8 for six covering-plates 9 which may be adjusted so as to show any one day-name only. Instead of separates plates 9 a rolling shutter having an aperture may be used to cover six of the daynames. In a modification the aperture 7 exposes four day-names only, and two apertures for the dates are provided, separated by a distance equal to the distance between three day-names, either one of these apertures being used whiles the other is closed by a plate.
Patent GB-266436-A (GB)
Title: Method of degreasing raw wool and the like
IPC: C11B11/00
Filed: 1925-11-23
Abstract: 266,436. Bruckhoff, A. M. Nov. 23, 1925. Addition to 241,314. Fats and fatty oils, extracting by solvents.- Raw wool, or waste wool containing fat or mineral oil, is degreased by drying to a water-content of 2-3 per cent, extracting in the liquid phase with a water-soluble mild grease solvent or solvents other than acetone which is referred to in the parent Specification, and washing with water to remove residual solvent and, when the fibres are treated so as to contain less than 2-5 per cent of fat, to substitute water for part of the extracted fat. Solvents specified are methyl acetate, methyl alcohol, and wood spirit. The aqueous solution of soap and potashes from the wool may be treated to obtain useful potassium compounds e.g. potashes.
Patent GB-625582-A (GB)
Title: Photographic contact printing apparatus
IPC: G03B27/22
Filed: 1946-10-03
Abstract: 625,582. Photographic contact printing apparatus. CHEMISCHE FABRIEK L. VAN DER GRINTEN. Oct. 3, 1946, No. 29562. Convention date, Oct. 11, 1945. [Class 98 (ii)] The panel of glass or other light pervious material over which objects to be exposed in the apparatus are moved in relation to the surface of the panel, is given a ribbed or serrated surface, whereby the chance of seizure of the objects to the panel is reduced. Printing may be direct or reflex and exposure may be.effected whilst the pack is moving or stationary, in the latter case the advantages of the invention lie in reduced chance of seizure during acceleration of the pack. The panel may be plane or curved, and the required uneven surface may be obtained by attaching particles or strips of transparent material to a smooth panel, or, preferably, elevations are incorporated into the material. Commercially available ribbed or engraved glass may be used, a surface with crests and troughs each half a milliametre wide is suitable. Fig. 5 indicates one desirable arrangement of ribs. In Fig. 8 the shaded portions represent the elevations and the arrows indicate the direction of movement of the photographic pack. Specification 187,008, [Class 98 (ii)], is referred to.
Patent GB-231216-A (GB)
Title: Improvements in vibration responsive devices
IPC: H04R1/22
Filed: 1923-11-23
Abstract: 231,216. Western Electric Co., Ltd., (Western Electric Co., Inc.). Nov. 23, 1923. Vibration-dampers.-A mechanical vibrating system for damping vibrations, adapted to suppress partiallv or wholly all frequencies above a predetermined limiting frequency, comprises a number of masses distributed along and rigidly fixed to an elastic member or members. the values of the masses depending upon the elasticity of the member or members In the construction shown in Figs. 3 and 4, the system comprises a number of rectangular masses 49 fixed on an elastic bar 48, and the value of each mass is directly proportional to the elasticity of the bar and inversely proportional to the square of the limiting frequency. Damping elements may also be provided such as longitudinal sheets 56, Fig. 7, of paper or aluminium foil, granular material 60, Fig. 9, surrounding the device, or friction discs 64, Fig. 11. of spongy material such as rubber, which may loosely engage both the bar 62 and an outer casing 61. The devices may be used for damping parts of apparatus such as telephones, gramophones, &c. Figs. 16 and 17 illustrate the invention applied to a harmonic cylinder. A number of masses 141. of the shape shown, are connected bv four elastic strips 112 - - 115. One end of the device is connected to a vibrating armature of a permanent magnet 144, and distributed along the device are sound resonators 149 - - 152. The device may be tapered for connecting unequal mechanical impedances, as shown in Fig. 20, where the smaller end is connected to a carbon button 185 and the larger end to a diaphragm 188 of a transmitter. Specifications 142,115; 231,409 and 231,410, [both in Class 40 (iv), Telephones &c.], are referred to.
Patent GB-427746-A (GB)
Title: Improvements in the manufacture of ferro-prussiate paper and in the production of prints therefrom
IPC: G03C1/64
Filed: 1933-10-25
Abstract: 427,746. Photographic ferroprussiate processes. HARPER, L. R., Redstacks, Court Road, Ickenham, and POWELL, D. W., Windy Ridge, St. Thomas's Drive, Hatch End, both in Middlesex. Oct. 25, 1933, Nos. 29629/33 and 33776/34. [Class 98 (ii)] A method of producing ferro-prussiate prints consists in employing for the developing and fixing operation, hexamethylene tetramine and a metallic salt which in the presence of hexamethylene tetramine yields an insoluble addition compound by reaction with the soluble ferricyanide of the print. This compound has little reaction with the unchanged ferric salt of the print, so that it is unnecessary to wash with water after the fixing operation. Metallic salts of calcium, strontium, barium, magnesium, aluminium, zirconium, uranium, and cerium, may be used. Suitable proportions of the hexamethylene tetramine, metallic salt and acid are selected. The blue of the background is intensified and stabilized by oxidizers such as alkaline bichromates, which do not decompose the hexamethylene tetramine. The sensitizing solution for the. paper should include an alkaline oxalate, and the hexamethylene tetramine may be contained in part in the sensitizer and in part in the developing and fixing solution.
Patent GB-862775-A (GB)
Title: Improvements in binders for documents
IPC: B42F13/02
Filed: 1958-09-16
Abstract: 862,775. Loose-leaf binders. ZIPPEL, G. A. Sept. 16, 1959 [Sept. 16, 1958], No. 29636/58. Class 146(1). A binder comprises two lengths of flexible tube and a follower, the follower having holes through which the free ends of the lengths of tube can pass and means for securing said free ends in positions substantially parallel to the plane of the follower and substantially at right angles to the length of the follower. The free ends 2 of a single piece of flexible plastic tube, comprising said lengths of tube, are passed through holes 9 in the follower 8 of semi-rigid plastic material placed on top of sheets filed in the binder, and held in position by passing them under tongues 11 on the follower, which flatten and grip the tube as shown at 2a. The central portion of the flexible tube is permanently flattened by welding the sides of the tube together, so as to reduce the overall thickness of the binder, and is attached to a cover by threading it through two or more apertures in a cover stub. The ends of the tongues 11 are bent upwards slightly to facilitate engagement with the ends of the tube. A transfer device is provided comprising an additional flexible tube 6 joined to the ends 2 by plug-and-socket connections 7. A multiple binding device may be used comprising several tubes joined.. together along their central flattened portion. In an alternative arrangement, the two lengths of tube comprise two separate lengths anchored to the cover. The tubes may be oval in cross-section.
Patent GB-1560348-A (GB)
Title: Methods of and apparatus for delaying the commencement of braking in regulated transport drives
IPC: B66B1/44
Filed: 1977-07-14
Abstract: The braking command is triggered, particularly in a lift drive, in dependence on two guide curves (VS1, VS2) which correspond to two voltages (Usoll, Ucomp) and on a third voltage (UX). The first guide curve represents the start-up variation, that is to say the speed of travel as a function of time. The second guide curve is the nominal braking variation in the same type of representation. The said third voltage is obtained by integrating the difference between these two guide curves in that the voltages corresponding to the guide curves are supplied to the input of an integrating section and the third voltage appears as output voltage at the output of this section. The voltages corresponding to the guide curves and the said output voltage are supplied to a comparator. The output signal of the comparator is used as braking command. This braking command delays the initiation of the braking process to a time (t1) so that a maximum speed is reached at the switch-over point. In this manner, the so-called crawling distance can be kept to an optimum shortness. <IMAGE>
Patent GB-469753-A (GB)
Title: Improvements in or relating to processes and installations for generating cold
IPC: F25B19/00
Filed: 1934-10-31
Abstract: 469,753. Refrigerating. NYAULD, H. Oct. 28, 1935, Nos. 29730 and 29731. Void. Convention dates, Oct. 31, 1934 and June 26, 1935. [Class 29] Cold is produced by the fall in pressure and evaporation of a liquefied natural gas, e.g. propane or butane, used as fuel supply to a burner 40 or other combustion device, which may be used for cooking. The liquid fuel is fed from a bottle through a pipe 29 to an evaporator 35 placed in a refrigerating chamber 26 and preferably provided with a freezing compartment 28. After evaporation the gas is led to the burner through a pipe 38, which may have a coiled part 37 inside the refrigerator. The evaporator may contain a mixture of glycerine and water or other non- freezing liquid through which the gas bubbles and which acts as a cold accumulator liquid. The inlet valve 30 to the evaporator may be controlled by a spring loaded diaphragm 31, and a valve 39 may be provided in front of the burner. Alternatively the inlet to the evaporator may be controlled by a float valve. Another arrangement is described in which the liquefied gas is sprayed through a nozzle into a jacket space between an outer insulated casing and an inner metal walled refrigerating chamber, the gas being led from the jacket to the burner.
Patent GB-1282321-A (GB)
Title: Improvements in water softeners
Inventor: ROBERTS CYRIL STANLEY
IPC: B01J49/00
Filed: 1969-06-12
Abstract: 1282321 Ion exchange WATER SOFTENER & VACUUM CLEANER SERVICE Ltd 19 May 1970 [12 June 1969] 29934/69 Heading B1J A tube in a brine regenerant tank for a cationic water softener has arcuate slits with sides which slope upwardly in the direction of the interior of the tube to allow passage of water to a mass of granular salt which surrounds the tube, but prevent backflow of the granules. The level of water in the tube and tank is controlled by a float operated valve in the interior of the tube.
Patent GB-1507938-A (GB)
Title: Register control system for a moving web
IPC: B65H23/02
Filed: 1975-07-17
Abstract: 1507938 Register control scanner for moving web HURLETRON ALTAIR 17 July 1975 29995/75 Heading G1A [Also in Division G3]  Such a scanner for sensing the passage of marks 61-64 on web 10, whose path is illuminated and which reflect light to be sensed by electric circuitry producing scanning pulses for controlling register, comprises a flexible light conduit element as 73, 74 with incoming 71, 72 and outgoing 77, 78, light paths at the end remote from the path of the marks and a rigidifying arm as 121, 122 connected with the end adjacent to this path to retain it in scanning relationship with this path. Elements 73, 74 are bendable and twistable relative to the ends remote from the path of the marks and comprise optical fibres randomly distributed between paths 71, 77 and 72, 78 respectively, the adjacent ends being shaped like marks. Servomotor 22 is coupled to both the sidelay adjustment mechanism of printing cylinder 14 and sleeve 18, which thus move in step. Sleeve 18 slides on mounting bar 16 secured to the frame of printing apparatus and carries scanner box 45 containing source 70 and photocells 81, 82, and scanner elements 20 and 46 adjustable so as to position apertures 50, 51, whose thickness to width ratio is small, the thickness being small enough to enable resolution of markes spaced by 1 mm, the phase difference of the optical pulses from which indicates the degree of lateral register between web 10 and cylinder 14 and can actuate motor 22 to adjust it. Manually operated screw assemblies 111, 119, 120 for riders 110, 116, 117 engage V shaped notch 114 in sleeve 18. Arms 121, 122 are angularly adjustable relative to riders 116, 117 and adjustment bracket 126 provides longitudinal position adjustment of aperture 51 by knob 127. Tubing 131 supplies purging air.
Patent GB-702999-A (GB)
Title: Means for indicating loss of pressure of aircraft pressure generators
Inventor: BLAZDELL CHARLES
IPC: F15B20/00
Filed: 1950-12-07
Abstract: 702,999. Pressure gauges. DOWTY EQUIPMENT, Ltd. Dec. 7, 1951 [Dec. 7, 1950], No. 30023/50. Class 106 (2). [Also in Group XXXIII] In order to check the working of three separate fluid pressure generators an indicator 5, Fig. 1, is connected with each of the inlets 21, 22, 23 connected to a separate pressure generator. Each inlet communicates with a piston 20, Fig. 2, which forces a button 7 out of the body 5. A second piston 15 of larger cross-sectional area is also provided and actuates a lever 11 common to all the buttons such that when pressure is applied to this piston all the buttons will be held in the body 5. When it is desired to check the state of the three separate pressure generators the pressure on piston 15 is reduced. The pressure on each piston 20 will then force out each of the buttons indicating that pressure is available from each generator. If one of the generators has failed the respective button will remain in the body 5 independently of the remaining buttons. The slot 9 in each button has sufficient clearance for this purpose. The buttons incorporate a spring loaded ball 32 to provide a positive locating device to prevent accidental movement of the buttons back into the body 5. In the example described the dominant piston 15 is fed from a fluid pressure line which is connected to a retractable undercarriage mechanism of an aircraft so that when the aircraft is landing and the undercarriage is lowered the pressure on piston 15 is reduced. The separate pressure generators are then supervised and the indicator buttons are freed out of the body 5. After the machine has landed and the engines are switched off, the buttons remain out indicating that immediately prior to switching off the engines the pressure generators were functioning correctly.
Patent GB-1090156-A (GB)
Title: Transfer drum for sheet processing machines
Inventor: SCHONE HELMUT
IPC: B41F21/10
Filed: 1965-07-15
Abstract: 1,090,156. Printing apparatus. DRUCKMASCHINENWERK PLANETA, VEB. July 15, 1965, No. 30049/65. Heading B6C. [Also in Division F2] In a sheet-fed multi-colour rotary printing machine in which printed sheets are transferred from one printing cylinder 3 to a further printing cylinder 4 through the agency of a transfer drum 12 the drum is made in three sections held together by readily releasable fastenings so that it may be readily disassembled to aid removal from the machine. The main section of the drum comprises a basic drum body 12 having flat end faces 31 and flat side faces 15, 16. The body 12 carries shaft and trunnion means 17, 18 and grippers 5, 8. The other two sections are drum segments 13, 14 which incorporate means for quick releasable fastening to the body 12 and which embody surface coverings 21, 22 for preventing set-off of the freshly printed sheets coming from the cylinder 3. Each of the three sections of the transfer drum has holes 25 by which it may be lifted from or lowered into the machine.
Patent GB-210536-A (GB)
Title: Improvements in means for converting reciprocating into rotary motion
IPC: F16H25/12
Filed: 1922-11-03
Abstract: 210,536. Springfield, G., Shouls, E., and Shouls, E. M. Nov. 3, 1922. Driving-gear.-In an inter-. nal combustion or other engine, the piston or cylinder is provided with a helical groove .d which engages ball-bearing- mounted pins e in the cylinder or piston respectively. The rotary, piston motion is transferred to a shaft f by grooves in the piston engaging balls g in a head h thereon. The shaft passes through inwardly-projecting cylinder heads which serve as guides for the sleeve ends of the piston.