baber/WOPTO huggingface dataset:
Patent GB-455831-A (GB)
Title: Improvements in or relating to potentiometric balancing and indicating apparatus
IPC: G01R17/02
Filed: 1935-12-27
Abstract: 455,831. Current and pressure meters; potentiometers. GILBERT, R. W., 106, Harrison Street, East Orange, New Jersey, U.S.A. Dec. 27, 1935, No. 35822. Convention date, Jan. 5. [Class 37] Potentiometric apparatus for measuring small voltages or currents comprises a bridge 1 having a pair of photoelectric elements 4, 5 in two of the arms, a thermionic valve 10 with its grid connected across a diagonal of the bridge, a balancing circuit B containing the source S of voltage to be measured and a resistance R1 in the output circuit of the valve, means responsive to unbalanced current flow in the balancing circuit B for oppositely varying the illumination of the photoelectric elements in such a manner as to restore a condition of equilibrium in the balancing circuit, and an indicating or recording meter M in the output circuit of the valve. In the arrangement shown in Fig. 1, when the voltage of the source S is balanced against the voltage drop in the resistance Rl no current flows in the coil 15 of a galvanometer G. The mirror 16 of the galvanometer directs a beam of light 17 on to the apex of a prism 20-which splits the beam into a pair of emergent beams 21, 22 directed on to the photoelectric elements 4, 5. Any out of balance current in the coil 15 deflects the mirror and increases the illumination of one photoelectric element while decreasing the illumination of the other, thereby varying the potential applied to the grid of the valve with a corresponding variation in the output current of the valve and adjustment of the voltage drop in the resistance R1 to restore the balance in the circuit B. The mirror 16 is left in the position to which it has been rotated. In a modified arrangement, Fig. 2, for measuring current without introducing resistance or load into the circuit, such as the no-load current of a photocell 5, the galvanometer coil 15 is placed in shunt to the source S, and a resistance R3 is placed in series in the balancing circuit B. In this arrangement the source S is connected so that its voltage is aiding the voltage across the resistance R2 in the output circuit of the valve. In another arrangement, Fig. 3 (not shown), combining the features of Figs. 1 and 2, the whole of the apparatus is energized from a single A.C. source through a transformer and rectifiers, and the balancing circuit is provided with sockets for the insertion of multi-prong plugs carrying either the resistance R1 or the resistances R2 and R3. Specification 399,641 is referred to.
Patent GB-1023032-A (GB)
Title: Improvements in and relating to optical systems and cameras
IPC: G02B13/14
Filed: 1962-09-20
Abstract: 1,023,032. Photographic apparatus; optical objectives. D. L. FULLER. Sept. 20, 1962 [Oct. 4, 1961], No. 35841/62. Headings G2A and G2J. A wide angle lens system 50 comprises semicylindrical front and rear components 51, 54, the rear component consisting of integral members 55, 56, and intermediate meniscus components 52, 53, all the components being co-axial and the curved surfaces thereof in the horizontal plane having a common centre at A1 so that the system gives equal magnifications and coincident faci in the horizontal and vertical meridian planes of the system. Opaque plates 60, 61 housed in transverse slits between members 55, 56 define an aperture stop 62, there being a further stop 63 between the menisci 52, 53. This stop 63 is defined by a curved slot in an opaque arcuate sheet, the slot being of increasing width from the centre outwards. The system 50 is held between two discs 23, 24, Fig.1 (not shown), which pass through slots in the front wall 22 of a camera case having a detachable back, the arcuate surfaces of the discs within the case acting as guides for the film as it is advanced between spools. Grooves in the facing sides of these discs accommodate opaque sheets 67 which are movable to vary the frame width. The upper and lower margins of the inner surface of front lens 51 and the front surface of lens 55 have masks 68, 69 to reduce reflection within the system. In a modification instead of two intermediate components 52, 53, three are provided.
Patent GB-952592-A (GB)
Title: Derivatives of 4:4-bis(4-hydroxyphenyl)-pentanoic acid and methods of preparing the same
Inventor: FREDERICK LESLIE
IPC: C07C37/00
Filed: 1959-05-22
Abstract: The invention comprises compounds of the formula: <FORM:0952592/C2/1> (wherein R1 is hydrogen or a lower alkyl group and, when R1 is hydrogen, A is CH2OH or CH2NR2R3, R2 and R3 each being hydrogen or a lower alkyl group or together with the nitrogen atom forming a 5-or 6-membered saturated heterocyclic ring optionally containing a further hetero atom, or, when R1 is alkyl, A is CH2OH, the word "lower" referring to groups containing at most 4 carbon atoms) and the acid-addition salts and quaternary ammonium derivatives of the amino compounds; and their preparation by (1) when A is CH2NR2R3, reducing the corresponding amides or (2) when R1 is hydrogen and A is CH2OH, reducing an ester of the formula: <FORM:0952592/C2/2> (wherein R4 is an alkyl of at most 8 carbon atoms); or (3) when R1 is alkyl and A is CH2OH, reducing an ester of the formula: <FORM:0952592/C2/3> Examples are given, and hydrochlorides and methiodides of the amines are described.  The compounds of the invention, which are stated to be of value as therapeutics, may be made up into pharmaceutical compositions with suitable carriers.
Patent GB-648259-A (GB)
Title: Improvements relating to frequency converter circuits for multi-band superheterodynereceivers
IPC: H03D7/10
Filed: 1946-12-04
Abstract: 648,259. Radio receiving 'circuits. RADIO CORPORATION OF AMERICA. Dec. 4, 1946, No. 35894. Convention date, Dec. 4, 1945. [Class 40 (v)] In a frequency converter circuit for a multi-band superheterodyne receiver having a local oscillator comprising a thermionic valve, at least two tank circuits and means for switching the tank circuits alternatively in circuit with the valve, the cathode of the valve is permanently connected to the tank circuit for the higher frequency band. The oscilator valve is constituted by the cathode K and grids G1, G2 of a pentagrid mixer T. For the highest frequency, or FM, band the oscillator is of the Colpitt's type having a frequency-determining circuit comprising variable tuning condenser C2, inductance L2, and condensers Cg, Ck. Cathode K is permanently connected to the junction of condensers Cg, Ck, to reduce stray inductance, and the frequency determining circuit is connected to grid G1 by band switch S4 when in position FM. For the relatively lower frequency AM and SW bands, the oscillator is of Hartley type using a tuning condenser C3 and circuits L1, Cp and L5, C<SP>1</SP>p, respectively, necessary connections being made by switches S4, S5, S6 in the AM, SW positions. In the FM position of switch S6 the D.C. cathode return is through the lower tapped portion of L1, which is an effective choke at the higher frequency. In the AM and SW positions of S6, condensers Cg, Ck appear as onehundredth of their value across coils L1, L5, as the tapping points are about one-tenth the way along the coils, and may be ignored. The antenna ANT is connected by switch S1 in the FM position to coil l2 coupled to coil L<SP>1</SP>2 tuned by condenser C<SP>1</SP>2 ganged with C2. For AM and SW the antenna is coupled to coils L<SP>1</SP>1, L<SP>1</SP>S, tuned by condenser C<SP>1</SP>3 ganged with C3. Switch S3 selects the appropriate input for application to signal grid G3, the corresponding I.F. being selected by a tuned circuit in the anode lead. The Colpitts oscillator circuit may be modified by having the inductance L2 and condenser C2 in series. Also the switch S4 may be placed between L2 and C2 (Figs. 2, 3, not shown).
Patent GB-429697-A (GB)
Title: Improvements in positive holders or retarders for use in connection with the pasteurisation of milk or other liquids
IPC: A23C3/03
Filed: 1933-12-21
Abstract: 429,697. Pasteurizing and sterilizing apparatus for liquids. BURNARD, H., 49, Meadow Close, Raynes Park, London, and COTTER, E. W., 28, Croham Valley Road, South Croydon. Dec. 21, 1933, No. 35957. [Class 49] In apparatus for sterilizing or pasteurizing milk or other liquids comprising a plurality of compartments arranged in one shell, or separately each in an insulated container, the inlet and outlet valves for the milk &c., in each compartment are operated and controlled electrically by means of solenoids actuated by a combined clock and mercury switch. In one form, the compartments 1-4 are arranged in a shell 5 and surrounded by insulation 8 and have each an outlet valve 10 connected by a detachable rod 12 and lever 13 to a solenoid 11. Alternatively the lever 13 may be omitted and the rod 12 connected directly to the solenoid 11 which is mounted on a bracket above the shell 5. The milk is supplied to the compartments through a hopper 15, carried on a cradle secured to the shell 5, having an outlet valve for each compartment operated by a solenoid 19 and connected through a detachable pipe to the compartment. The combined clock and mercury switch 25 may be mounted in front of hopper 15 or may be placed away from the apparatus. During the holding period the milk &c., is agitated by paddles 26 mounted on a shaft 27 oscillated through crank gear driven by an electric motor, shafting, &c. A separate removable cover is provided for each compartment. The solenoids may be fitted remote from the machine, e.g. upon a wall or panel, and may be connected to the inlet and outlet valves by flexible cables.
Patent GB-776381-A (GB)
Title: Improvements relating to pipe joints
IPC: F16L23/06
Filed: 1954-12-13
Abstract: 776,381. Band Clips. MEARS, C. R. March 13, 1956 [Dec. 13, 1954], No. 35959/54. Class 44. [Also in Group XXVIII] A clamping member 9 for a pipe joint is formed by two or more clamping units 10 articulated one to another and each comprising arcuate members 13 spaced apart axially of the pipes and joined by circumferentially-spaced bridge-pieces 14 which have hollow, inwardlyfacing V-shaped faces 15. The members 13 and bridge-pieces 14 may be cast in bronze or other material to form a unitary element, or made integrally as forgings or stampings; alternatively, the members and bridge-pieces are made as separate parts and connected by welding or riveting. Instead of bridge-pieces of the form shown, bobbin-shaped bridge-pieces may be used, these being rotatably mounted on spindles joining the members 13; one end of each of the latter is bifurcated to receive the plain end of an adjacent member. The toggle-type contracting means of the clamping member comprises spaced-apart arms 20 pivoted to a unit 10 at one end of the member and links 22 pivoted one to each arm, the links being provided with hookshaped ends to engage studs 23 at the opposite end of the member and being joined laterally by a bar 24.
Patent GB-522529-A (GB)
Title: Improvements in or relating to hospital and like stretchers
IPC: A61G1/00
Filed: 1938-12-12
Abstract: 522,529. Hospital stretchers &c. BILLING, N. P. Dec. 12, 1938, Nos. 36213/38, 4726/39 and 12652/39. [Class 108 (i)] One side 21 of a stretcher is adapted tc be collapsed against a side 20 by releasing a catch 28 on the trans. verse members 25 and sliding the side along the transverse members until it passes beyond a rule joint 26 after which the transverse members are hinged into the position shown in dotted line. The stretcher covering may be of tubular construction 70 of paper &c. which is stretched in position when the stretcher frame is expanded. The covering may be slit along the sides to lower the patient on to a table and the frame thereafter removed. The blocks 27 through which the members 25 slide may be provided with feet 23, Fig. 4, and the upper side may be provided with a socket 37 to receive a bar 36 for spacing one stretcher above another, the bar when not in use being stored in the ends of the hollow side bars. Handles 30 may be telescopic or may be hinged on the feet 23 and adapted to be turned under the side bars when not in use. In Figs. 6, 7, a carrier is formed by. pairs of channels 40, 41 spaced apart by transverse end members 25 with rule joints 26, one side sliding on the bars 25 into the collapsed position shown in dotted line. The upper and lower channels are connected by struts 43 which terminate in a wheel 45 and by vertical end channels 42 provided with sliding rods, one pair carrying wheels 48 and the other pair carrying spring plungers 49. The bars are secured in position by pegs 51 which turn into notches in the channel and by cramps 53. A covering over the stretchers may comprise a fabric over a collapsable frame.
Patent GB-362645-A (GB)
Abstract: 362,645. Knitting-machines. GRIEVE & CO., Ltd., T. and GRIEVE, T. S., Queen Street Works, Leicester. Nov. 20, 1930, No. 34935. [Class 74 (ii).] The yam guides 1 of a superposed cylinder or other rib or a plain machine are slidably mounted in parallel grooves in a block 3 in turn slidably mounted in a bracket 4 so that any guide 1 can be brought into. a common feeding position. An actuating lever 17 common to all the guides 1 is provided. Each guide 1 has a notch 12 for engaging a bar 13 on the bracket 4 ; a gap is provided in the bar opposite the feeding position and lever 17. The guides are preferably secured in the block 3 by a pivoted plate 8 so that they can readily be removed for threading &c. A device 50, 51, which moves from a position parallel to and spaced from the needles (see Fig. 4) to the position shown in Fig. 8, is provided for engaging an ingoing yarn to introduce a length of the yarn between two adjacent sinkers or web hotders so that it is laid in a position to be taken by the following needle. Yarn trapping and severing devices 29, 30 are provided, one for each guide, each device being opened by the corresponding guide during movement of that guide towards the needles. The means for actuating the trapping and severing devices preferably comprises a spindle 36 extending axially through a sleeve 37 slidably mounted in the block 3, the spindle 36 being slotted or grooved spirally for the reception of a ball 39 or pin in the sleeve, so that upon endwise movement of the sleeve 37 in the block the spindle 36 is rotated, together with the movable trapping and cutting parts which are secured thereto. A series of hooks 86 are fixed upon the block 3 opposite the throats of the guides 1 into engagement with which an outgoing yarn is drawn so as to be positioned between the jaws of the corresponding trapping and severing devices. A hooked element 73 operated in timed relation with the guides is provided for holding the yarn right up to the needles.
Patent GB-1506695-A (GB)
Title: Album leaf
IPC: C09J7/38
Filed: 1976-09-02
Abstract: 1506695 Coated films R SHIBATA and Z SHIBATA 2 Sept 1976 [27 Sept 1975] 36296/76 Heading B2E [Also in Division B6] An album leaf comprises a base 11, a layer of non-drying pressure-sensitive adhesive 12 and a protective layer 13 which can be frictionally removed piecemeal in areas where it is intended to apply a photograph or other article 14. Preferably the outer, surface of the protective film is textured to assist its removal.
Patent GB-1474216-A (GB)
Title: Fuel injection pump
IPC: F04B11/00
Filed: 1974-08-19
Abstract: 1474216 Fuel injection pumps CATERPILLAR TRACTOR CO 19 Aug 1974 [22 Aug 1973] 36426/74 Heading F1A A fuel injection pump has a delivery valve 26 having an annular portion 28 which engages a seat 24 provided on the end of the pumping cylinder 10 and a central bore 46 normally closed by a check-valve 50, the delivery valve and the check valve being urged towards their closed positions by co-axial springs 32, 56. The check-valve 50 is operative after closure of the delivery valve to relieve excess pressure downstream thereof. Variable thickness spacers 58 are used to adjust the compression of the spring 56.
Patent GB-973261-A (GB)
Title: Production of shaped articles from expandable thermoplastics
Inventor: NAGEL FRITZ
IPC: B29C44/42
Filed: 1962-09-26
Abstract: Expanded shaped articles are produced by plasticizing a finely-divided expandable thermo-plastic containing an expanding agent in the cylinder of a screw injection moulding machine at temperatures above the softening point of the plastic and at a pressure at least equal to the pressure of the expanding agent at the prevailing temperature, and introducing the plasticized plastic through a nozzle into a mould from which air can escape, the volume of unexpanded plastic being less than the volume of the mould, and interrupting the communication between the plasticizing cylinder and the mould by closing the nozzle after the plastic has been introduced.  Expanded articles of thermoplastics, e.g. polystyrene, styrene co-polymers, impact-resistant polystyrene made by polymerizing monomeric styrene and rubber, polyvinyl chloride, polyethylene, polypropylene, polisobutylene, polyamides, polyurethanes and polyvinyl carbazoles may be prepared.  The expanding agent may be a hydrocarbon, halohydrocarbon, ammonium bicarbonate, ammonium citrate, sodium bicarbonate, a mixture of an alkali metal carbonate or bicarbonate and an organic acid, azo compounds, nitroso compounds and hydrazine derivatives.  Examples relate to the foaming of polystyrene, a co-polymer derived from styrene and acrylonitrile, polymethyl methacrylate and polyethylene.
Patent GB-419173-A (GB)
Title: An improved switching arrangement for lighting installations
IPC: H05B41/44
Filed: 1933-12-29
Abstract: 419,173. Supply and control systems for lamps. HAGELIN, B. C. W., 29, Lastmakaragatan, Stockholm. Dec. 29, 1933, No. 36633. [Class 38 (iv).] In a lighting installation, gaseous discharge tubes are connected in series either directly or over series connected transformers and some or all are provided with short-circuiting switches by means of which they are ignited or extinguished when required, the tubes being fed from a constant current device so that the current through them is kept constant irrespective of the number in use. Gaseous discharge tubes 1<a>, 1<b>-1<n> are arranged in series connected groups, provided with short-circuiting switches 2<a>-2<n>, and fed from transformers 3<a>, 3<n>, the primary windings of which are connected in series and provided with short-circuiting switches 7<a>, 7<n>. The transformers 3<a>, 3<n> are fed from a constant current device 4 which comprises an oscillating circuit composed of a reactance 4<a> and a condenser 4b while a reactance 4c is said to provide power factor correction. Resistances may be connected in series with the switches 2<a>-2<a>. In Fig. 1 (not shown), the discharge tubes are supplied through a transformer having a tapped choke in its primary circuit, the tapping switches of the choke being operated in conjunction with the tube short-circuiting switches to give a constant tube current. A tapped transformer may be used instead of the tapped choke.
Patent GB-768292-A (GB)
Title: Testing apparatus for fuel injection pumps
IPC: F02M65/00
Filed: 1954-12-20
Abstract: 768,292. Testing fuel injection pumps. SATZGER, E. Dec. 20, 1954 [Feb. 15, 1954], No. 36710/54. Class 102(1) The pneumatic governor 3 of a fuel injection pump 1 under test is actuated by a vacuum created in a vessel 17 partly filled with fuel which is drawn out by a pump 9 feeding the pump 1. The degree of vacuum is controlled by a valve 20 which is variable to control the proportion of fuel drawn by the pump 9 from a reservoir 8 open to atmosphere. A valve 23 is provided to close the connection to the vessel 17 when a pump having a centrifugal governor is to be tested.
Patent GB-882865-A (GB)
Title: Improvements in adjustable skates
IPC: A63C17/18
Filed: 1959-10-30
Abstract: 882,865. Skates. ROSBRO PLASTICS CORPORATION. Oct. 30, 1959 [April 20, 1959], No. 36832/59. Class 132(1) An adjustable skate comprises separate sole and heel sections 12, 14 with slidably engaged extensions which can be secured in the required relative position by locking means comprising on one section a movable locking finger 36 actuated by a cam lever 40 to engage the other section. Sections 12, 14 are preferably moulded from plastic, e.g. linear polyethylene. The section 12 includes a supporting surface 16, which may have a peripheral flange 18, and has an aperture 20 from which depends a hollow housing 22 with a transverse opening 26 and an integral rearward channel-shaped extension 28. The bottom wall 30 of extension 28 has a finger 36 with a toothed locking dog 38 formed integrally therewith. A pivoted cam lever 40 can engage finger 36 to force it upwards into engagement with a rack 86 on section 14. Section 14 has a support surface 52 with a marginal flange 54, flexible moulded fastening straps and an aperture from which depends a housing 68 similar to housing 22 and having a transverse opening 70. A channel-shaped extension 76 extends forwardly from section 14 its top wall 78 having a raised portion 84 which slides in a slot 88 in surface 16 to guide the sections 12 and 14 when they are inter-engaged by sliding extension 28 into extension 76. Housing 22 has aligned cut-outs through which extension 76 passes, extension 28 passing through an opening in housing 68. The wheel axles 76 extend through the openings 26 and 70 in housings 22 and 68 and caps 100 hold the wheels on the axles. Alternatively, pairs of ice skate blades 108, e.g. of steel are carried on mounting pins 112 and 118 which pass through openings 26 and 70. Pins 118 slide in slots 116 in the blades to allow for adjustment. Alternatively, a single central blade may be used.
Patent GB-912190-A (GB)
Title: Improvements in or relating to hooded handle-bar levers
Inventor: LETHERLAND HARRY
IPC: B62L3/02
Filed: 1960-10-27
Abstract: 912,190. Clamps. RALEIGH CYCLE CO. Ltd. Sept. 20, 1961 [Sept. 27, 1960], No. 36903/60. Class 44. [Also in Group XXXI] The pivot mounting piece 11 of a handlebar lever 12 (also described in Group XXXI) is attached to the handlebar by a clip 14 the ends of which are formed into lugs 14b which are first closed together and then allowed to open out into recesses 11a for assembly to the mounting piece 11 and are retained there by a fixing nut 19 positioned between the lugs. The nut 19 is complementary to a fixing-screw 16 which is accessible within a hood 10 which encloses the mounting piece 11. A washer 17 below the head of the screw 16 bears on shoulders on the piece 11 to retain it. The lugs 14b may be formed as in Fig. 3 or be formed by bending the ends of the clip outwards (Fig. 2, not shown). Specification 797,588 is referred to.
Patent GB-522903-A (GB)
Title: Improvements in apparatus for the transmission of television and the like
IPC: H04N3/36
Filed: 1938-12-20
Abstract: 522,903. Television transmitters. GENERAL ELECTRIC CO., Ltd., and ESPLEY, D. C. Dec. 20, 1938, No. 37042. [Class 40 (iii)] Relates to means of the kind described in Specification 498,945, for compensating for illumination distortion in the interlaced scanning of a moving film. According to the invention, separate halves of the gate are illuminated by separate non-uniform beams of light having similarly distributed intensities, corresponding points in the two beams being always distant from each other by half the height of the gate. As shown, light from a single source 1 passes through a lens 2 and a pair of glass wedges 4, 41 to the gate 3. The beams are separated by a partition 5. The wedges are designed to deflect the beams so that the points of corresponding intensity therein are half the height of the gate apart. An alternative to the wedges is a pair of inclined glass plates. If the two beams are not of equal average intensity, a correction for this may be made by shifting the pair of wedges upwards or downwards, the partition 5 being provided with hinges 6, 7 to allow for this adjustment.