baber/WOPTO huggingface dataset:
Patent GB-635871-A (GB)
Title: Improvements in and relating to devices for limiting the amplitude of electric oscillations
IPC: H03G11/00
Filed: 1948-01-28
Abstract: 635,871. Thermionic limiters. BRITISH TELECOMMUNICATIONS RESEARCH, Ltd., and HOLLOWAY, D. G. Jan. 28, 1948, No. 2623. [Class 40 (vi)] In a limiter of the kind comprising a pair of valves coupled by a common cathode impedance, the effect of the control grid-cathode capacitance of the first valve is neutralized by applying to the control grid-cathode circuit of the second valve a voltage which is equal and opposite to the voltage produced in this circuit by the current flowing through the control grid-capacitance of the first valve. In Fig. 2, valves 10, 11 are coupled by cathode resistance 12, a high-tension source being connected to terminal 13. Input oscillations are applied at terminals 18, 20 and limited output oscillations are taken from terminals 22, 14. For neutralizing, oscillations are applied to a phase inverter valve 26, the output from which is applied through condenser 28 to resistance 12. The gain of valve 26 is unity, and condenser 28 is equal to the grid-cathode capacity of valve 10, thus balancing the currents in resistance 12. Phase invertors other than valves may be used, e.g. a suitable transformer for narrow band working. In Fig. 3, neutralizing is effected by a condenser 29 connected between the grids of valves 10, 11 and the grid of valve 11 is connected through resistance 30 to the junction of potentiometer resistances 15, 16 supplying grid bias, to which point is connected a decoupling condenser 31. The control gridcathode capacity of valve 10, together with elements 12, 29 and 30 form a bridge which is made to balance, so that there is no voltage difference between the control grid and cathode of valve 11, although they both vary together. To ensure zero anode current change the voltage across resistance 30 exceeds that across resistance 12 by (1-GR) where G is the mutual conductance and R is the effective impedance, of valve 11. For single frequency working, neutralizing may be effected by an inductance connected between the control grid and cathode of valve 10.
Patent GB-444668-A (GB)
Title: Improvements in and relating to electrical conductors with air space insulation
IPC: H01B11/00
Filed: 1935-01-26
Abstract: 444,668. Conductors. NORDDEUTSCHE SEEKABELWERKE AKT.-GES., Nordenham, Germany. Jan. 26, 1935, Nos. 2679 and 2680. Convention dates, Feb. 20, 1934 and March 21, 1934. Drawings to Specification. [Class 36] Air space insulation of electrical conductors is built up by means of a band or bands of polystyrol or of a polymer of a homologue of styrol, such band or bands being between 0À005 mm. and 0À02 mm. in thickness. A band may be wound on the conductor in open helical winding and a second band placed thereon in closed winding or a single band may be employed having a narrow fold or thickening at one or each edge, such band being applied in overlapping or abutting turns with the fold or thickening inside. Specification 392,416 is referred to.
Patent GB-1001057-A (GB)
Title: Improvements in or relating to systems and processes for providing a metered flow ofliquid
IPC: F04B23/06
Filed: 1962-01-24
Abstract: 1,001,057. Delivering measured quantities of liquid. A. S. LIMPERT, and R. J. LIMPERT. Jan. 24, 1962 [Feb. 13, 1961], No. 2686/62. Heading B8N. [Also in Divisions B1 and F1] In a system for delivering measured quantities of liquid, comprising a pump which draws liquid from a container and delivers the liquid to an open measuring vessel, which is filled to overflowing, and a second pump which removes the liquid from the measuring vessel, means are provided to remove liquid from the filled measuring vessel by controlled overflow in the amount necessary to lower the surface of the liquid to provide substantially the measured volume of the vessel or a predetermined volume prior to the operation of the second pump. In one embodiment, Fig. 8, not shown, the controlled overflow is provided by a woven wick secured around the upper edge of the measuring vessel. In a further embodiment, Fig. 10, measuring vessel 133 has flats on the exterior and is provided with a surrounding sleeve 134, slotted to grip the vessel resiliently. The small slots formed between the sleeve and the vessel act as capillaries to draw down the liquid surface in the vessel to provide a predetermined volume in the vessel. It is stated that axial adjustment of the sleeve 134 will provide variations in the level of the upper surface of the liquid retained by the vessel. In Fig. 1, pump 22, 23 delivers excess liquid to measuring vessel 28 and pump 29, 31 draws the measured quantity from the vessel and delivers the liquid to a stream of liquid flowing in pipe 11. The pumps of Fig. 1 may be replaced by diaphragm pumps 83, 84, Fig. 5, actuated by an hydraulic pulsing unit via line 81. In conjunction with pumps 83, 84 the controlled overflow may be provided by a piston 108, Fig. 7, which is lowered to contact the upper surface of measuring vessel 102 by bellows 103 actuated by the pulsing unit actuating the pumps. To ensure that all of the measured quantity in the measuring vessel is removed, the capacity of the pump removing liquid therefrom is greater than that of the measuring vessel. Parts of the system may be of transparent plastics material within which the presence of air bubbles indicates correct operation of the system. To provide adjustment in the quantity of liquid supplied per unit time, the speed of the pumps, which are operated synchronously, may be adjusted.
Patent GB-849618-A (GB)
Title: Air filtering device
Inventor: LINDSAY DAVID
IPC: A62B23/00
Filed: 1959-01-26
Abstract: 849,618. Respiratory appliances. MINE SAFETY APPLIANCES CO. Jan. 26, 1959, No. 2718/59. Class 81(2). [Also in Group XXVIII] A filter unit (see Group XXVIII) located in a line between a supply of compressed air or oxygen and a breathing mask (not shown) is clipped to the belt of the operator and includes a manually' operable flow control valve 15, 19, Fig. 5 having an inlet and outlet coupling 17, 26 and passages 18, 24 leading to and from the inlet and outlet ends of the filter cartridge 7, Fig. 4 which is located in a rubber housing 1 having a valve body receiving portion 2. The valve may be used independently of the filter by sliding it from its housing 2 after unscrewing the face mask hose coupling 26 from passage 24 and then screwing it into passage 18 ; the supply hose being left reconnected to coupling 17.
Patent GB-122297-A (GB)
Title: Improvements in and relating to Piston and Stuffing Box Rings.
Inventor: RYDER ARTHUR
IPC: F16J9/00
Filed: 1918-02-16
Abstract: 122,297. Ryder, A. Feb. 16, 1918. Drawings to Specification. Packing, metallic. - A split cast-iron packing- ring is not machined on the surface opposite to the bearing surface. The ring may be cast with a projection on the unmachined surface for preventing rotation, and the inner and outer peripheries of the ring may be eccentric to one another. The packing is applicable for the plungers and piston-rods of steam-engines, gasengines, pumps, &c.
Patent GB-1331202-A (GB)
Title: Heat exchanger for dividing one medium into two parallel main  streams
IPC: F28D7/12
Filed: 1972-11-20
Abstract: 1331202 Tubular heat exchangers SVENSKA MASKINVERKEN AB 20 Jan 1972 [26 Jan 1971] 2843/72 Heading F4S In a shell and tube heat exchanger, heating fluid entering a distribution chamber 3 via an inlet 4 in vapour form, passes through a plurality of pipes 2 and back along finned return pipes 20 before leaving as condensate through an outlet 6 in the bottom of a collection chamber 5. Openended tubes 7 surround the return pipes 20 and are arranged in two groups separated by an annular region 8, opposite ends of the tube groups opening into chambers 10 and 11 which are interconnected by a central tube 13. In use the fluid to be heated, e.g. oil, enters the heat exchanger through an inlet 14 into the annular space 8 where it divides into two parallel streams and passes through the passages defined between the tubes 7 and pipes 20. Heated oil collected in chamber 10 is led into chamber 11 via the central tube 13, the combined heated oil streams leaving chamber 11 by way of outlet 12. The combined streams may be passed through an additional heat exchanger part (16, Figs. 4 and 5) enclosed within the shell for further heating. In another embodiment (Fig. 3, not shown) wherein a portion of the heat exchanger projects into an oil tank, the direction of flow of the oil to be heated through the heat exchanger is in the reverse direction to that shown in Fig. 1 above.
Patent GB-444136-A (GB)
Title: Improvements in or relating to steam generating and superheating installations
IPC: F22G5/20
Filed: 1935-01-29
Abstract: 444,136. Steam superheaters. SUPERHEATER CO., Ltd., and GEER, H. E., Bush House, Aldwych, London. Jan. 29, 1935, No. 2882. Addition to 360,285. [Class 123 (iii)] The superheater 2, 3 of a boiler unit A is protected while steam is being raised by passing saturated steam from another unit C of the installation through the superheater, as described in the parent Specification, and, instead of taking the cooling steam to the superheated steam main 11, it is led into an auxiliary main 25 from which it is returned to the unit C at a point between the boiler and a desuperheater 4 controlling the superheat. The desuperheater in each unit may be arranged between primary and secondary superheaters 2, 3, the flow of steam through the desuperheater being controlled by valves 7, 8 operated by a thermostat 9 in front of the superheaters. In a modification, the temperature of the steam flowing from the superheater of each unit to the main 11 is controlled by a direct-contact desuperheater.
Patent GB-401916-A (GB)
Title: Improvements in and relating to counting apparatus
IPC: G06M1/10
Filed: 1933-01-30
Abstract: 401,916. Counting-apparatus ; controlling apparatus by light rays. BRITISH THOMSON - HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Cockrell, W. D. ; 1, Rugby Road, Schenectady, and Juchter, P. ; 349, Glen Avenue, Scotia, both in New York, U.S.A.) Jan. 30, 1933, No. 2888. Convention date, Jan. 30, 1932. [Class 106 (i).] Apparatus for counting objects moving in a predetermined path comprises a plurality of photo-electric cells successively affected by the objects, an amplifier and a relay connected with each cell and a further group of relays operated by the first-mentioned relays, the arrangement being such as to count the objects passing in one direction but not in the other. The apparatus is shown arranged to count persons entering a theatre. A person passing inwards intercepts a light beam 6 thus causing, through a photo-electric cell 9 and amplifier 11, the de-energization of a relay to close contacts 17 and to complete through contacts 31, 23 the circuit to a relay 25 which closes contacts 27, 28. The person then intercepts a second beam 7 (the first beam still remaining intercepted) which, through photo-electric cell 10 and amplifier 12, causes the closing of relay contacts 20 thereby completing a circuit to another relay 36. The counter circuit is then completed through contacts 33, 28 and a holding circuit is established for relay 25 through contacts 32, 27. If a person passes in the opposite direction the relay 36 is energised before the relay 25 and the counter is not actuated. To prevent a double count being caused by a person carrying, e.g. an umbrella, when the relay 36 is actuated it completes a holding circuit for itself through contacts 35 which is not broken until the contacts 17 are opened by the person passing out of the light beam 6.
Patent GB-1248861-A (GB)
Title: Method of reducing the caking tendency of fertilisers
IPC: B01J2/00
Filed: 1969-01-17
Abstract: 1,248,861. Coating granular fertilizer with SiO 2  dust. ELEKTROKEMISK A.S. 17 Jan., 1969 [19 Jan., 1968], No. 2890/69. Heading C1B. A method of treating a granular fertilizer to reduce its tendency to cake, comprises coating the grains of the fertilizer with SiO 2 -containing dust which has been recovered from the smoke produced in a metallurgical process. The dust is very finely divided and may be of specific surface in the range 15-20 sq. metres per gram. In the example, granulated phosphate of grain size 1-3 mm. is coated with a smoke from a smelting furnace producing metallic silicon.
Patent GB-472892-A (GB)
Title: Improvements in and relating to valves and valve gear for reciprocating steam engines
IPC: F01L29/04
Filed: 1936-01-31
Abstract: 472,892. Engine valve - gear. KILBY, J. A. Jan. 31, 1936, No. 2907. [Class 122 (ii)] In a valve-gear for a steam engine operated from the engine piston-rod, a combination lever is moved by a link connected to the cross-head to give the valve a lap-and-lead movement, and the pivot of the lever is moved by a block in a quadrant oscillated from the cross-head to effect the travel. In a modification, the piston valve has a reciprocating movement to effect a lap and lead motion and is oscillated by a quadrant to effect the cutoff. In the construction shown in Fig. 1, the valve motion is taken from a lever 32 one end of which is connected by a rod 34 to the piston tail-rod 3, to receive a the lap-and-lead motion, the travel of the valve being effected by reciprocating the pivot of the lever through a rod 27 connected to an adjustable block in a quadrant 23 mounted on a shaft 19 carrying an arm 18 which is oscillated by a link 17 connected to an arm 1 oscillated by the piston-rod motion. The piston tail rod 3 carries a cross-head 2 with rollers 6, 7 which alternately engage grooves 11, 12 in a sleeve 8 mounted around the tail rod and effects its oscillation. The crosshead 2 is moved transversely from one slot to the other at each end of the stroke by bevelled end walls on the grooves. The sleeve 8 carries a bush 9 upon which is mounted the arm 1. The tail-rod reciprocates a plunger which circulates oil through the casing. Oil is transferred from the sump 34 through a strainer 35 and distributed by pipes 40 to the valve-gear parts. In a modification, the valve is adjustably oscillated from the arm 1 to effect the cut-off. The valve-rod 28 is reciprocated by the arm 13 to obtain the lead-and-lap motion. In a locomotive arrangement, the movement of one valve may be transmitted to the other.
Patent GB-375233-A (GB)
Title: A new and improved cover for domestic frying pans
IPC: A47J36/06
Filed: 1932-02-01
Abstract: 375,233. Frying-pan covers. MILLS, F., 34, Elm Grove, Crouch Hill, London. Feb. 1, 1932, No. 2925. [Class 66.] A frying-pan cover has a ventilation opening formed at the top of a tapering funnelshaped part a and is provided with a channel c, for the collection of moisture, formed by turning the lower edge inwardly. The cover engages the pan either by means of an externally fitting riveted-on rim d, or by an integral internally-fitting rim formed by bending the inner edge of the channel c downwardly. A handle b is provided.
Patent GB-752661-A (GB)
Title: Improved confection and method of manufacture
IPC: A23G3/02
Filed: 1954-02-01
Abstract: Gelled confections of the gumdrop, jelly bean, orange slice and mint leaf type having 15-25 per cent water content are made by heating a slurry of starch and sugar of substantially the water content desired in the finished confection, heating the slurry at a temperature above the boiling point at atmospheric pressure and maintaining sufficient pressure to prevent boiling until the starch is cooked, cooling the product rapidly to below the boiling point at atmospheric pressure, and forming the product to the confection pieces, e.g., casting it in moulds, including "cups" in which the confections are to be sold. The rapid cooling may be effected by passage of the cooked slurry as a thin, confined layer through a cooling zone while agitating the slurry and maintaining the superatmospheric pressure.  A slight excess of water in the slurry may be allowed to evaporate on release of the pressure, and so assist in the cooling.  The confections are homogeneous, have good clarity, are not caramelized, are free from unruptured starch granules, and do not possess hard skins. p Examples are concerned with the treatment of mixtures of water with corn syrup (glucose solution of 20 per cent water content), sucrose and starch, and of sucrose syrup with corn syrup, sucrose or sucrose with invert sugar, and starch, additions such as colourings, citric acid, licorice extract and fruit flavourings being made just before the casting.  The starches specifically referred to are an acid modified, thin boiling maize starch, and sago.  Other gel-forming substances, e.g. gelatine and gum arabic, may be used in conjunction with the starch.
Patent GB-708341-A (GB)
Title: Improvements in fluid operated clutch and/or brake devices
Inventor: CROFT ARTHUR
IPC: F16D55/00
Filed: 1951-02-07
Abstract: 708,341. Disc brakes. CROFTS (ENGINEERS) Ltd. Feb. 6, 1952 [Feb. 7, 1951], No. 3010/51. Class 103(1) [Also in Group XXIV] A fluid-operated brake comprises a pair of plate members 44, 52, Fig. 3, with an interposed disc 53 splined in a member 55, one member 52 being axially fixed while the other member 44 is splined on a member 43 secured within member 52 by an annular plate 49 which serves to clamp between the parts 52, 49 and 43, 49 the edges of an annular flexible diaphragm 47 covering an annular recess 48 in the plate 49 to form a chamber to which pressure fluid may be supplied. An annular piston-like part 66, integral with member 44, is urged by springs 46 against the diaphragm within the annular space between the members 43, 52. Member 55 is stationary and member 43 is fast on shaft 42 to be braked, the springs 46 normally engaging the brake while pressure fluid causes disengagement. In the combined clutch and brake shown in Fig. 1, the brake 2 is arranged as in Fig. 3 but with member 52 stationary and member 55 being secured to the driven shaft 10, and the clutch comprises a ring 8 carried by member 55 and adapted to be contracted on to a driving drum 6 by a tube 7 adapted to be expanded by pressure fluid supplied simultaneously thereto and to the recess 48, so as to engage the clutch and disengage the brake. On release of the fluid supply, the clutch disengages and the springs 46 engage the brake.
Patent GB-227295-A (GB)
Title: Improvements in relation to a whizzer used in the grain cleaning department of a flour mill
IPC: B02B1/00
Filed: 1924-02-06
Abstract: 227,295. Turner, Ltd., E. R. & F., Turner, G. W., and Reed, W. Feb. 6, 1924. Damping grain.-In a grain whizzer, a supply of water, regulated by the tap F, passes through the hollow spindle to the outlets G on the rotary parts carried by the spindle. The grain enters by the inlet C and passes upwards to the discharge E through the water jets. The amount of surface water on the grain when it is discharged is varied by means of the tap F.
Patent GB-739370-A (GB)
Title: Improvements in or relating to adjustable electro-acoustic transducers
IPC: G10K11/35
Filed: 1954-02-02
Abstract: 739,370. Subaqueous signalling. KRAUSE, J. F. Feb. 2, 1954, No. 3111/54. Class 118 (2). Relates to a rotatable and retractable electroacoustic transducer for a marine echo-sounder such that the transducer may be employed for depth sounding when in its retracted position and for determining the bearing and declination of submerged objects when it protrudes below the hull of the vessel. As shown the transducer element 20 is pivoted at 21 about a horizontal axis to the bottom of a vertical tubular member 17 which is rotatably and slidably mounted in an outer tubular member 13 whose lower end is screwed into a hole in the hull 11 of the vessel. The upper end of the inner tube 17 is rigidly secured to a member 19 which extends through a cap 31 rotatably mounted on the top of outer tube 13. The member 19 carries a lever 26 connected by links 28, 25 and 24 extending.through tube 17 to the transducer element 20 which may be rotated downwards about the horizontal pivot 21 by operation of lever 26. The inclination of the tranducer element in the vertical plene it its declination, is indicated by a scale 35 and pointer 34. A bubble level 36 is mounted on member 19 to provide correction for listing of the vessel. The vertical position of the transducer is adjusted by sliding tube 17 within tube 13 and then clamping member 19 and link 25 to cap 31 by means of clamp 32 and wing nut 33. In its retracted horizontal position as shown in the Figure, the transducer element fits into a recess in the hub 12.
Patent GB-1416371-A (GB)
Title: Dynamoelectric machine
IPC: H02K5/00
Filed: 1973-01-22
Abstract: 1416371 Dynamoelectric machine stator supports GENERAL ELECTRIC CO 22 Jan 1973 [24 Jan 1972] 3138/73 Heading H2A A dynamoelectric machine, e.g. a large steam or gas-turbine generator, comprising an armature stator assembly 17 having an electromagnetic core 19 positioned between two end frames 15 and within a minimal non-supportive outer wrapper 41, is characterized in that the assembly 17 is supported by springs 29 mounted directly on the machine foundations thereby isolating core vibrations caused by electromagnetic forces as the rotor rotates, from the outer wrapper 41. The springs are connected to the stator core at its points of minimum vibration determined as described in Specification 684,929, which is referred to.
Patent GB-294083-A (GB)
Title: Improvements in multicylinder pumps
IPC: F04B1/12
Filed: 1928-02-01
Abstract: 294,083. Jackson, L. Mellersh-, (Tubize Artificial Silk, Co. of America). Feb. 1, 1928. Cam-actuated pumps; revolving- cylinder pumps. - A pump for artificial silk &c. comprises a casing A provided with inlet and outlet passages A<6>, A<7> opening into end chambers B, B', which are connected respectively to suction and delivery chambers A<2>, A<3> by conduits A<4>, A<5>. A rotor J has a number of pump barrels J<4> which communicate alternately with the chambers A<2>, A<3> by means of ports J<5>. The plungers L are actuated by a helical cam F<2> engaging their heads L<1>. A screw G presses the rotor J against an abutment H<4> on the end plate H. Specification 294,082 is referred to.
Patent GB-159176-A (GB)
Title: Improvements relating to electromagnetic switch devices
IPC: H01H50/64
Filed: 1921-01-26
Abstract: 159,176. Metropolitan-Viewers Electrical Co., Ltd., (Assignees of Hodgkins, C. H., and Goodwin, W. C.). Feb. 20, 1920, [Convention date]. Electromagnetic and magnetic switches.-An electromagnetic switch or contactor which can be adapted for use with alternating current, comprises a core 18 with poles 22, 23, an armature 20 adapted to be attracted to the poles, and pivoted at its magnetic balance on a pivotallysupported member 21 so that the poles when energized exert equal turning moments on the armature about its pivot 35. The core 18 is laminated, and made in two portons with an air gap 27 between them, and has parallel pole faces 33, 34. The winding 19 is mounted on one limb 23 of the core, which is mounted on the base 3. The supporting-member 21 is pivoted at 41 to depending ears of the core side plates, the boxlike sides 36 carrying pivotally at 35 the laminated armature 20. The armature pivot 35 has an enlarged portion 37, which forms a bearing for the restricted portion 38 of the aperture in the laminated armature, the enlarged portion being rounded to permit a limited universal motion so as to permit intimate contact between the two pairs of pole faces 33, 34. Shading-rings 43 are provided to prevent chattering. Lugs 40 of the member 21 secure it at each side to an insulated bar 15, which carries pivoted movable contacts 4. adapted, on attraction of the armature, to complete circuits through fixed contacts 1, current passing from the terminals 16 to the terminals 11 Magnetic blow-outs are provided for each contactor, consisting of coils 7, arc shields 6, arc splitters 9, and magnetic side plates 8, compression springs 14 being provided to produce a yielding engagement between the contacts.