baber/WOPTO huggingface dataset:
Patent GB-515640-A (GB)
Title: Improvements in electrical frequency-selective systems
IPC: H03H9/54
Filed: 1938-06-08
Abstract: 515,640. Impedance networks. ROBINSON, J. June 8, 1938, No. 17082. [Class 40 (iii)] A filter comprises two parallel arms, each containing two or more crystals or other selective devices 12, 14 and 13, 15, the frequencies of these devices being alternately arranged in the order f12, f13, f14, f15 ; and input energy is applied to the two arms in phase opposition, for instance by means of the centre-tapped transformers 11, or alternatively phases of the output energy are similarly opposed. Phase-changing means, such as condenser 19, is connected in shunt with one of the arms and is so adjusted that the response of the system at frequencies between the resonant frequencies of each pair of crystals. &c. of adjacent frequency is alternately raised and lowered, thus obtaining the desired frequency characteristic. There may be twelve crystals instead of four, and the intervals between successive frequencies may be 300 and 200 c./sec. alternately ; or the frequencies may be so spaced that those at the middle of the band are furthest apart. In a modification the characteristic may comprise a pass-band (Fig. 3, not shown) between f13 and f14 with stop bands on either side ; isolated peaks of amplitude at f13 and f15 can in this case be removed by means of supplementary tuned circuits. A plurality of pass bands or stop bands can be obtained by the use of additional crystals in each arm. The crystals 12, 15 or 13, 14 may be replaced by series-tuned inductance-capacity arms, Fig. 4 (not shown), or a crystal in each arm may be in parallel with a series-tuned circuit tuned to the frequency of the crystal in the other arm. In a further modification, two crystals 13, 14, Fig. 5, may feed one valve 22 while two tuned circuits 20, 21 feed another valve 23, the outputs of the two valves being in parallel. The valves may be replaced by step-down transformers. By using an odd total number of resonant elements, a low-pass or high-pass characteristic can be obtained. The transformer 11, Fig. 1, may be replaced by a centre-tapped resistance or by a pair of push-pull valves. Retroaction may be used as described in Specification 509,235 and the peaks may be removed from the characteristic in the manner described in Specification 509,141. Specification 400,404 also is referred to.
Patent GB-1433181-A (GB)
Title: Self levelling apparatus
IPC: G01G23/00
Filed: 1973-04-10
Abstract: 1433181 Automatic control of position AUGUST SAUTER GmbH 10 April 1973 [10 April 1972] 17095/73 Heading G3R [Also in Division G1] The attitude of a vibration damped work surface, resting on a plurality of legs, is regulated by varying the length of at least one of the legs in dependence upon the deviation of the work surface from a desired attitude. As shown, a sensor 2 detects any deviation of a work surface 1 from the horizontal and controls the excitation of a reversible motor 13 via a differential amplifier 26, so as to vary the length of a support leg 9 and maintain the work surface horizontal. The sensor is a pendulum whose position is detected photo-electrically, inductively, galvanomagnetically or capacitatively. The leg adjustment may be by a driven nut 10 coacting with the threaded leg 9 as shown, a cam drive or a toggle lever. The work surface, which may support a measuring instrument e.g. a balance, has three legs, each with rubber vibration dampers 8 or springs 27, and the levelling control can be used on one or two of the legs.
Patent GB-612902-A (GB)
Title: Improvements relating to pyrophoric lighters
IPC: F23Q2/34
Filed: 1946-06-05
Abstract: 612,902. Frictional lighters. LOWENTHAL, J., and MOORE, C. W. June 5, 1946, No. 17113. [Class 75 (iii)] In a lighter the wick cap 16 and the housing for the flint and flint spring are carried by a member 19 detachably secured in a recess formed on the top of the lighter by the sides being extended. A hole 33 in one of the extended sides permits adjustment of the tension of the flint spring, and slots 32 supply air to the flint. The wick cap 16 is held in either the closed or open positions by a spring plunger.
Patent GB-651029-A (GB)
Title: Electric power transmission system, especially for vehicles
IPC: B60L50/13
Filed: 1948-06-25
Abstract: 651,029. Induction machines ; transmitting mechanical power. MASCHINENFABRIK OERLIKON. June 25, 1948, No. 17207. Convention date, Aug. 29, 1947. Drawings to Specification. [Classes 35 and 38 (iv)] [Also in Group XXXVII] In an electric power transmission system, particularly for traction, of the kind comprising an asynchronous' generator with capacitance excitation supplying a squirrel cage motor compensation for the wattless current of the motor to avoid high starting current and consequent high torque is effected before the start of energy supply by the generator by connecting a condenser battery across the motor terminals and then adding condensers in parallel thus permitting a surgeless regulation of the generator. The compensation may be effected before the motor is connected to the generator provided with its own condenser battery. Alternatively the motor may be permanently connected with the generator and a single condenser battery used to which further condensers are added until the group is overcompensated to provide the surgeless starting. The auxiliary means to provide selfexcitation may comprise precharged condensers.
Patent GB-530789-A (GB)
Title: Improvements in devices for lighting operating rooms
IPC: F21V21/34
Filed: 1939-06-13
Abstract: 530,789. Hospitals. ANCIENS ETABLISSEMENTS BARBIER, BENARD & TURENNE. June 13, 1939, Nos. 17258 and 17259. Convention dates, July 29, 1938, and April 13, 1939. [Class 20 (i)] ] [Also in Group XI] A lighting system for use particularly in operating theatres involves the use of a transparent false ceiling 4, 5 with the lighting unit transportable along and around as shown so that light can be directed at convenient angles on to the patient under operation. As shown in Fig. 10 students can be provided for in separate compartments.
Patent GB-243273-A (GB)
Title: Combined settee and bedstead
IPC: A47C17/165
Filed: 1925-07-07
Abstract: 243,273. Glanger, B. July 7, 1925. Bedsteads convertible into sofas and seats have a bell crank lever g connecting the seat back e and bottom h so that when the latter is disengaged from position and pushed backwards and down, the seat back tilts down on the pivot pin g' to form a level bed with a covered mattress surface. Anti-friction bowls i on the lower front edge of the seat h engage inclined rails i on the seat frame, a bar h<7> at the top front edge of the seat resting on a ledge on the seat frame to hold the seat in position for use. Chair arms d in two parts d<2> hinged at d' are opened to form end rests before changing from a seat to a bed, and the back when lowered rests at one end on its pivots with the lever g and at the other end projections k engage brackets k<2> on the frame. On raising the back, the seat is also raised and the back is held upright by the folded arm rests d, which are partly cut away at their ends to hold the back.
Patent GB-1379379-A (GB)
Title: Thietanols
IPC: A23L27/20
Filed: 1973-04-11
Abstract: 1379379 Aroma compositions L GIVAUDAN & CIE SA 11 April 1973 [12 April 1972] 17380/73 Heading A2B [Also in Division C2] Aroma compositions which may be added to foodstuffs contain a compound of the formula: where R<SP>1</SP> is H or C 1-10 alkyl and R<SP>2</SP> and R<SP>3</SP> are H or C 1-3  alkyl.
Patent GB-1142004-A (GB)
Title: Disc brakes
Inventor: DOWELL FREDERICK SIDNEY
IPC: F16D55/224
Filed: 1965-04-24
Abstract: 1,142,004. Disc brakes. DUNLOP CO. Ltd. 12 April, 1966 [24 April, 1965], No. 17386/65. Heading F2E. In a heavy duty disc brake having a pair of arcuate pads 13, 14 of part-annular form which are applied to an axially fixed disc 2 by a floating applying mechanism including a tie rod 27 passing adjacent the inner periphery of the disc, the disc being supported at its outer periphery by a spider 3, distortion of the pads is avoided by arranging that contact between the pad backing plates 15 and the corresponding pressure plates 11 and 12 is along an arcuate edge defining the radially outer edge of a relieved region extending between the contacting plates, so that distortion of the pressure plates as a result of the tension in the tie rod when the brake is applied does not cause the pads to wear unevenly. Preferably, as shown, each pressure plate 11 has an arcuate rib 17 arranged between radially inner and outer relieved regions so as to bear against the backing plate 15 at its mean radius. Also, to allow for circumferential distortion of the pressure plates, each pad is loosely attached by spring clips 21 to pins 18 projecting from the corresponding pressure plate, the clips 21 being accommodated in recesses in the pad lining. The torque imparted to the pads by the disc during braking is taken by thicker pins having enlarged heads 24 provided with radial flats 25 to engage correspondingly formed apertures in each of the pad backing plates. It is said that a substantially constant pressure can be obtained over the circumference of the pads by suitable design of the profile of the pressure plates since the slight tilting of these caused by distortion assists in maintaining full pressure at their ends. Upon removal of the clips 11 and slackening of the applying mechanism the pads can be dislodged from the two sets of pins and removed; in the case of the pad 14 this is effected part-radially and part-circumferentially via apertures 16 in the spider 3. The applying mechanism comprises a plate 32 having three inclined recesses accommodating balls 33 which also engage corresponding recesses in a ring secured to the pressure plate 11.  The plate 32, which bears against a sleeve 26 screw-threaded on tie rod 27 for adjustment purposes, is rotated to apply the brake through an integral lever 37. Instead of a rib 17 being provided on each pressure plate, the ribs may be provided on the backing plates, or a separate ring may be provided between each pressure plate and the corresponding pad. The area of contact may extend from the mean radius of the pad up to its outer periphery.
Patent GB-1581751-A (GB)
Title: Electromagnetic contactors
IPC: H01H50/30
Filed: 1977-04-26
Abstract: The switching contactor has a magnetic core (12), which is firmly anchored in its housing (10) and is formed from layers of core laminates, and a winding (14) which is mounted thereon and is held by a winding former (13). The magnetic core (12) is mounted in the housing (10) by means of at least one spring clip (16), which is of approximately U-shaped construction, engages, at right angles to the plane of the layers of the core laminates, around the magnetic core (12) and the winding (13, 14) mounted thereon and is suspended on or latched into studs (23, 24) or eyes which are connected to the housing (10). The spring clip (16), which consists, for example, of spring-tempered material with a round or rectangular cross-section, can have on its centre limb (20) a formed projection which points towards its clip ends (21, 22) and is preferably curved. In addition, a damping element (26) consisting of elastomeric material can be arranged between the winding (14) or winding former (13) and the magnetic core (12), which damping element (26) together with the spring clip (16) carries out a mass-compensating and damping function. <IMAGE>
Patent GB-1023597-A (GB)
Title: Apparatus for freezing a microtome specimen
IPC: F25B21/02
Filed: 1964-04-27
Abstract: 1,023,597. Refrigerators. WHIRLPOOL CORPORATION. April 27, 1964 [May 8, 1963], No. 17424/64. Heading F4H. Apparatus for freezing microtome specimens comprises a brine fillet container 14, a heatconducting specimen support 26 having a portion 25 extending into the brine, a removable heat-conducting cover 34 and thermoelectric cooling means 15 for cooling container 14. Cover 34 is secured in a recess in the foamed polystyrene insulation 22 of a lid 21 hinged at 20 to an enclosure 10 in which the container 14 is mounted. The thermoelectric means 15 are cooled by water jackets 16 and an electrical socket (not shown) is provided in the wall of enclosure 10. A pad 29 of resilient material is provided in the lid above the cover 34.
Patent GB-278798-A (GB)
Title: Improvements in covers for jam jars and like containers
IPC: B65D41/22
Filed: 1926-07-13
Abstract: 278,798. Goss, A. A. July 13, 1926. Indiarubber and other elastic stoppers.-A closure for preserve jars &c. comprises a rubber &c. cap 2 which, when stretched over the jar, is held in position by a thicker band 3 made integral with the cap or secured to it, the outer or lower edge 4 of the cap standing out loosely from the jar to facilitate removing or applying the cap.
Patent GB-724496-A (GB)
Title: Liquid level control valves
IPC: F16K31/24
Filed: 1953-06-24
Abstract: 724,496. Float-actuated valves. JENNINGS, I. C. June 24, 1953 [Sept. 6, 1952], No. 17602/53. Class 135. A. float-valve mechanism comprises a lever having a float arm 12 and a valve arm. with a passage 16 through it, a part-spherical valve head 14, e.g. of stainless steel, having a stem 15 projecting through the passage with freedom for lateral adjustment and means clamping the adjusted valve to the arm, e.g. the nut 17 screwing on the stem. The valve arm is on the same side of the fulcrum 11 when the mechanism is applied to a container supplied with liquid through the seat opening 8, and on the opposite side when liquid is discharged through the opening. The valve has a wiping action as it moves on to or away from its seat.
Patent GB-438581-A (GB)
Title: Improvements in and relating to electric power-transmitting apparatus, especially for sewing machines
IPC: D05B69/12
Filed: 1935-06-18
Abstract: 438,581. Motor driving-arrangements. PFAFF AKT.-GES., G. M., 140, Wittelsbacher Strasse, Kaiserslautern, Germany. June 18, 1935, No. 17541. Convention date, June 18, 1934. [Class 35] Power-transmitting apparatus, particularly for driving a sewing-machine, comprises an electric motor 1 and assocated friction clutch 7, 11, wherein the rotor shaft 6 is hollow and has within it a bearing for the driven clutch member 10, 11, the clutch spring 13, and the clutch operating rod 17. The driven clutch element 10, 11 constitutes a pulley and the part 11 has friction surfaces to engage either with the driving element 7 or with a fixed brake ring 12. The member 7 is secured to the hollow shaft 6 and the shaft 9 of the driven element 10, 11 is mounted in a bush 8 in the hollow shaft and has a reduced end surrounded by a helical spring 13 which bears at one end against a thrust bearing 14 abutting against the bush 8 and at the other end against a nut 15 screwed on the shaft 9. The nut 15 carries a ball 16 against which bears a rod 17 when the clutch is disengaged. The rod 17 is connected to a rod 18 carried in guiding lugs 20, 20<1> and urged to the left by a spring 21. The rod 18 terminates in a flange 19 against which bears a pin 28 on a disc 27 mounted on the axle 25 of an operating lever 26. When the lever is depressed by the action of a pedal and a tie-rod 29, the pin 28 acts on the flange 19 to move the rod 18 to the right. This causes the rod 17 to be withdrawn from the ball 16 so that the spring 13 moves the clutch element 10, 11 into engagement with the element 7. The spring 13 rotates with the shaft and is stationary when the clutch is disengaged. The spring 21 is stronger than the spring 13 so that when the clutch-operating lever is released, the rod 17 compresses the spring 13 to free the clutch. The lever 26 may be turned to occupy the position shown in dotted lines.
Patent GB-1013929-A (GB)
Title: Improvements in or relating to devices for controlling synchronised gear engagement in change-speed gear transmissions
IPC: F16H61/00
Filed: 1962-05-08
Abstract: 1,013,929. Change speed control. FABBRICA ITALIANA MAGNETI MARELLI S.p.A. May 8, 1962 [May 9, 1961], No. 17588/62. Heading F2D. [Also in Division H3] In a change speed gear control wherein, during ratio shift, establishment of a new ratio is prevented until synchronism is attained, the latter is detected by a transistorized comparitor circuit V 1 , V 2  which compares the voltages from an input driven generator G 1  and the appropriate tapping, corresponding to the selected ratio, of an output driven generator G 2 , and when the voltages are approximately equal the comparitor circuit triggers a transistorized control circuit V 3 , V 4  which operates a relay M that permits establishment of or establishes the selected ratio. As shown, the voltages from A.C. generator G 1 , G 2  are applied through rectifiers R, C 1 ; R, C 2  to the bases of transistors V 1 , V 2  which when the applied voltages are approximately equal (i.e. equivalent to within 10% of synchronism) produce maximum voltage at R 4  which causes transistor V, to become saturated and energize the relay M. When the applied voltages differ the appropriate transistor V 1  or V 2  becomes saturated and produces a voltage at R 4  which causes the transistor V 3  to cut-off and the transistor V 4  to become saturated whereupon the relay M is de-energized. A gear shift lever switch C selects the appropriate tapping of the generator G 2 . For starting in the lowest speed ratio or reverse a switch C<SP>1</SP> energizes the relay M directly from a battery N. By making suitable circuit modifications the generators may be replaced by D.C. generators. As shown, energization of the relay M moves right a sleeve 22 against the action of a spring 26 thus releasing a locking ball 18 from a groove 16 in a rod 10, axial movement of which latter establishes the gear ratio. In Figs. 6 and 7 (not shown) the relay operates a radially movable plunger which acts on the locking ball. As shown, a single locking device acts on a rod 10 between the gear shift lever 12 and selector rods 14 but individual locking devices may be provided for each selector rod (Fig. 3), not shown) in which case a further gear shift lever switch connects the control circuit to the appropriate locking device relay. The locking devices may be omitted in which case ratio shift is selected manually and established at synchronism by pneumatic servos energized through solenoid valves which are selectively connected to the control circuit by a gear shift lever switch (Fig. 9, not shown). Reference has been directed by the Comptroller to Specification 854,031.
Patent GB-394813-A (GB)
Title: Improvements for rubber printing stamps
IPC: B41K1/02
Filed: 1932-06-23
Abstract: 394,813. Hand-stamps. CLARKE & SON, Ltd., J. T. and CLARKE, H. R., 60, Charles Street, Manchester. June 23, 1932, No. 17706. [Class 100 (ii).] A hand-stamp comprises a metal base A of double channel or double tee section with flanges b, b<1> projecting to the face and flanges d, d<1> projecting to the back to receive and protect a printing-pad B and an indicating- strip D respectively. The pad B is preferably an air cushion pad such as is described in Specification 286,881, [Class 100 (ii), Printing processes &c.], and is cemented within the recess formed between the flanges b, b<1>. The side edges of the base A may have flanges e, e<1> forming recesses to receive printed strips a<2> secured by cellulose or other cement, the strip D being similarly fixed in position.
Patent GB-243408-A (GB)
Title: Improvements in or relating to brake lever arrangements for railway and other vehicles
IPC: B61H13/20
Filed: 1924-07-25
Abstract: 243,408. Monarch Door Controller Co., Ltd., and Bowles, G. B. July 25, 1924. Hand actuation; force-transmitting mechanism. -Brake lever mechanism of the kind in which the ratio of movement of the member to which the power is applied compared with that by winch the force is transmitted to the brakes is automatically reduced when the blocks have been brought into contact with the wheels comprises a set of force-multiplying levers and a slidable wedge, or an abutment slidable on a cam surface, on the last lever of the set by which movement is imparted to the last lever, white the blocks are being brought, into contact with the wheels, the wedge or abutment being actuated by a yielding spring connection from the first lever. As shown in Fig. 2, a lever a to which the piston rod f of a vacuum brake cylinder is connected is freely mounted upon a shaft c and is connected by a link e to a second lever b tuning about a pivot d. The lever b engages, by a wedge m slidable thereon, a projection i<2> on a -ever i<1> secured to the shaft c on to which shaft is also secured the lever i connected to the brake blocks. The lever i<1> is shown as lying directly behind the lever a. The wedge m is connected by a lever n pivoted on the lever l and by a link o to an arm a<1> rigid on the boss of the lever a, a spring s being interposed between the arm a<1> and a nut t on the link o. When the lever a is moved upwardly to apply the brakes, movement is imperted to the lever i' by the lever b through the wedge m, and at first also by the sliding of the wedge on the lever b by reason of the connections n, o, a<1> from the lever a. When the blocks have thus been brought into contact with the wheels, the springs s yields and the pressure is applied to the lever i<1> through the connections a, e, b and the wedge m, the ratio of the arms of the levers a, b as shown being such that the ratio of pressure transmitted is as 4 : 1. Fig. 8 shows a form of the mechanism suitable for operation by hand levers on either side of a vehicle. The levers a, a<1> are in this case secured to the shaft c<1> on which the hand levers are mounted and the levcr arms i, i<1> are freely mounted on this shaft. The lever b engages the arm i<1> by a pin m<1> which slides on a surface i<2> formed on the arm during the initial movement of the mechanism.
Patent GB-610039-A (GB)
Title: Rivet and riveting method
IPC: F16B19/12
Filed: 1945-07-12
Abstract: 610,039. Rivets. PHILLIPS, S. H. July 12, 1945, No. 17867. Convention date, Jan. 25, 1944. [Class 89 (i)] Non-metallic rivets for use in situations in which only one side of the work is accessible are made hollow for expansion by fluid such as air at a relatively low pressure after the rivet has been made plastic by heating to a temperature preferably below 400‹ F. A suitable synthetic thermoplastic material is methylmethacrylate. The thickness 22, Fig. 2, at the end of the rivet exceeds that of the wall 24b to ensure that the rivet expands after the manner shown. Air is applied by a nozzle from a pipe line at a pressure of from 25 to to 35 lbs. per square inch to deform and cool the heated rivet. The rivets may have projecting heads and may be reinforced by longitudinal wires embedded in the wall and splaying over into the head. When used for such work as securing a fabric sheet 48, Fig. 5, to a wooden backing 50 the rivet hole may be lined with a metal sleeve 52 and the rivet may have a conical metal tip 54 to facilitate insertion. The rivets may be employed for mounting metal parts on metal plates for which they must be electrically insulated; rivets being first secured in the plates and the parts then attached by screws tapped into the bores.
Patent GB-1523236-A (GB)
Title: Stone trap for harvesters
IPC: A01F12/16
Filed: 1976-05-01
Abstract: 1523236 Stone traps for harvesters CLAYSON NV 22 April 1977 [1 May 1976] 17884/76 Heading A1F The trap 10 is positioned to extend beneath the crop elevator 1 at its discharge end and comprises a forwardly, downwardly sloping floor 13 having a front edge to which a door 14 is pivoted by hinges 24. In its closed position the door seals with the underside of the elevator.