baber/WOPTO huggingface dataset:
Patent GB-704659-A (GB)
Title: Improvements in or relating to directly fed notched aerofoil aerials
Inventor: JOHNSON WILLIAM ARTHUR
IPC: H01Q1/28
Filed: 1948-12-15
Abstract: 704,659. Aerials. MINISTER OF SUPPLY. Dec. 14, 1949 [Dec. 15, 1948], No. 32491/48. Classes 40 (5) and 40 (7) A metal skin aerofoil w is adapted to function as an aerial by forming a notch in its edge at a position selected to intercept a substantial part of any current in the aerofoil, the notch being cut to a depth which is small compared with a quarter wavelength and tuned to resonance by a capacity c connected across the notch. R.F. energy is coupled to or extracted from the notch by coaxial cable c. Metal plates, a<SP>1</SP>, a<SP>2</SP>, b bound the sides of the notch, and dielectric covers e', e' enclose the notch to maintain the aerodynamic surface. Condenser c is controlled remotely by electric motor k. The construction illustrated is suitable for installing in the trailing edge of a wing and the aerial thus provided operates with horizontally polarized means. For vertically polarized means the leading edge of a fin may be notched, Fig. 5 (not shown), the fin functioning as a unipole with the aircraft acting as a counterprise. In this embodiment the notch is completely filled with a shaped dielectric slab, and the tuning condenser is housed within the notch in a hole in the dielectric. Radio frequency input and output couplings.- As shown coaxial cable c is connected across the slot between the side plates a<SP>1</SP>, d at a position from the end plate b selected to provide an impedance match. In an alternative matching system, Fig. 3 (not shown), the cable is connected across one of two tuning condensers connected in series across the notch. According to the Provisional Specification, Fig. 2 (not shown), the coaxial cable is connected directly across the mouth of the notch and a tuning condenser is connected across the cable by means of a T junction. Specification 607,159 is referred to in the Provisional Specification.
Patent GB-187878-A (GB)
Title: Improvements in automatic stopping devices for gramophones
IPC: G11B17/02
Filed: 1921-12-06
Abstract: 187,878. Nielsen, P. O. T., and Nielsen, E. M. Dec. 6, 1921. Electric.- Relates to automatic brakes for gramophones of the kind comprising a spring- actuated brake-lever controlled by an electromagnetically operated catch, the circuit of the electromagnet including a contact carried by the tone-arm and a coacting contact adjustably arranged on the gramophone casing. According to the invention a right angled bracket j fitted on the underside of the top of the casing carries the electromagnet i and is fitted with a clip t which holds the battery u, the bracket also having lugs k on which is pivoted a bell-crank lever h of which the vertical arm h<1> forms the armature of the magnet and the horizontal arm h' serves as a catch to hold the spring-actuated brake-lever d. When an arm p moving with the tone-arm touches an adjustable contact q, the battery circuit, which includes the brake-lever d, the bell-crank lever h and the bracket j is completed. To throw the automatic device out of action, the contact q can be moved out of the path of the arm p or the lever d may be turned right back so as to be retained in the " off " position by its spring.
Patent GB-939827-A (GB)
Title: Fluid pressure servomotors, particularly for fluid pressure braking systems
IPC: B60T13/57
Filed: 1961-09-12
Abstract: 939,827. Fluid-pressure brakes. BENDIX CORPORATION. Sept. 12, 1961 [Sept. 16, 1960], No. 32732/61. Class 103 (1). A fluid-pressure servomotor comprises a housing 30 divided into three chambers 32, 34, 36 by movable walls 38, 40, a valve body 58 which is axially movable but normally maintained in contact with an end wall 64 of the housing, and a control member 80 axially movable within the valve body to cause pressure to be raised in the chamber 34 so that wall 38 is moved forwardly to apply a force to the piston 12 of a master cylinder 10 and wall 40 is moved rearwardly, a hub portion 60 of the wall 40 contacting an abutment 110 of the control member during such rearward movement to apply " feel " to the control member and to cause lapping of the valve. The walls 38, 40 are caused to abut in the non-actuated condition, or if the power supply (which, as shown, is vacuum) fails, so that the master cylinder can be operated directly in the latter case through the abutment 110, the valve body 58 then moving away from the end wall 64, entrained by a snap-ring 70 on the hub 60, against the restoring force of a spring 104. Spring 68, which presses hub 60 away from valve body 58 to engage the snap-ring 70 therewith, determines the minimum increase of pressure in chamber 34 which will react on the control member. In the non-operated condition, vacuum is communicated via an inlet 74 to the chamber 36 and via an interconnecting tube to the chamber 32. Vacuum is also communicated via openings in a guide 66 for the valve body 58 to a space behind the valve body which is sealed by a diaphragm type seal 86 secured between a tubular extension 62 of the valve body and a stiffening 88 which forms a valve poppet member. The poppet member 88 is pressed against a seat 78 of the control member 80 by a light spring 96 but is spaced away from a seat 76 on the valve body so that vacuum is also communicated via passageways 82, 84 to the chamber 34, seals 100, 102 preventing leakage. When operating member 94 is moved forwardly the control member is also moved so as first to close the poppet member 88 on the seat 76, cutting off the source of vacuum, and then to move the seat 78 away from the poppet member so that atmospheric air passes from the interior of extension 62 via conduits 82, 84 to the chamber 34. When pressure has built up in the master cylinder sufficiently to compress spring 68 by the corresponding pressure increase in chamber 34, the hub member 60 moves rearwardly and engages abutment 110, so moving control member 80 back against the applied pressure to lap the valve.
Patent GB-356025-A (GB)
Title: An improved device for sharpening the blades of safety razors
IPC: B24D15/08
Filed: 1930-10-31
Abstract: 356,025. Sharpening razors. SOC. INDUSTRIELLE ALLEGRO SOC. ANON., Emmenbrucke, near Lucerne, Switzerland. Oct. 31, 1930, No. 32807. Convention date, Feb. 6. [Class 60.] In a device for sharpening safety-razor blades comprising a blade-holder 3 mounted on a carriage 2 movable along a frame 1, so that the blade edge contacts with the curved surface of an obliquely placed sharpening-body 5, the body is mounted on pivots 11, 11<1> at its ends so that it rocks as the blade passes over it. The pivots are mounted in supports 12, 13 on the frame 1 and the body 5 is connected to a flat member 14 which has rolling contact with the surface 15 of a saddle 16 slidablv supported on the support 12 by a spring 17. The body has a honing-surface 9 and a stropping surface 10 and may be turned, to bring either surface into operation, by a handle 20. The surface 15 may be of roof shape in place of being convex as shown ; the support 12 has a slot 21 to allow of removal of the body 5. Specification 315,418, [Class 60, Grinding or abrading &c.], is referred to.
Patent GB-789440-A (GB)
Title: Rodent traps
IPC: A01M23/06
Filed: 1956-10-27
Abstract: 789,440. Rodent traps. McKIM, W. E. Oct. 27, 1956, No. 32840/56. Class 5(1). A rodent trap comprises a water tank on which is removably mounted a frame 20 having a transverse pivot-rod 35 carrying a horizontal runway 36, the free end of which is depressible by a rodent's weight, a plate 33 being pivoted both on the pivot-rod 35 and on the runway between the pivot rod 35 and the free-end, the frame also incorporating a platform 45 carrying a latch 46 which engages a latch plate 49 pivoted on the plate 33, the latch-plate being tilted when the runway tilts thereby enabling the animal to be dropped into the tank. The runway has depending flanges 37 which carry a rod 54 on which the latch plate 49 rests. The flanges 37 have a clearance hole 40 for the pivot rod 35 allowing the runway to rock slightly as the animal passes beyond the pivot rod in attempting to reach the bait-box 28 which is mounted in a tunnel 22 over the runway. As the runway swings, the rod 54 lifts the rear end of the latch plate 49 thereby allowing the runway to tilt into a nearly vertical position and thereafter to reset the trap in returning to the horizontal position. The tank is provided with an overflow chamber 12 and drain-cock 15. A runway is pivoted beneath each end of the tunnel 22 in the top of which is a door 25 for access to the bait-box.
Patent GB-1105226-A (GB)
Title: Hydraulic jack control system for earth-moving vehicles
IPC: E02F9/22
Filed: 1966-07-21
Abstract: 1,105,226. Hydraulic jacks. GENERAL MOTORS CORPORATION. 21 July, 1966 [27 July, 1965], No. 32846/66. Heading B8J. [Also in Divisions E1 and F1] Lowering of a digging member of an earthmoving machine, e.g. a bowl-type scraper, is by the fast or slow contraction of a ram on release of pressurized fluid, that has previously expanded the ram, through a valve-controlled passage passing through the piston of the ram when the valve is appropriately positioned in the passage to allow one of two possible rates of discharge therethrough. The position of the valve is controlled by two plungers disposed coaxially of the piston with the rear plunger bearing on the front plunger to which is permitted a longer axial travel than is available to the rear plunger. Actuation of one or other of the plungers is caused by pressurized fluid being supplied through the association of two concentric passages in the piston rod of the ram from the hydraulic circuit for feeding the ram, a solenoid-controlled valve being associated with each passage. These solenoid-controlled valves are operated through relays by a manual control mechanically coupled with the manual control regulating expansion of the ram.
Patent GB-805443-A (GB)
Title: Improvements in rectifiers utilising semi-conducting material
Inventor: KINMAN THOMAS HILARY
IPC: H01L23/051
Filed: 1954-11-12
Abstract: 805,443. PN junction rectifiers. BRITISH THOMSON-HOUSTON CO. Ltd. Nov. 2, 1955 [Nov. 12, 1954], No. 32847/54. Class 37. A sealed PN junction rectifier comprises a semi-conductor element containing a PN junction mounted between and in contact with conducting members to each of which is sealed a ring of insulating material of low thermal conductivity, the outer rims of the rings being joined by a metal ring to form an enclosure. In Fig. 1, rings 5 of ceramic are metallized at their inner rims and then soldered to shouldered copper plugs 2, 3. The PN junction element 1, e.g. of Ge or Si, is mounted between the plugs which are then heated to melt layers of solder previously provided on the plugs or element to seal them together. The solders used on opposite faces of the element comprise In, Al, or Ga and As or Sb, respectively. Metal ring 6 is then slipped over rings 5 and soldered thereto to form a sealed enclosure which may be evacuated or gas-filled through a suitable tubule. Alternatively the device is assembled in a suitable atmosphere.
Patent GB-382779-A (GB)
Title: Improvements in or relating to cans, canisters and like metal containers
IPC: B65D8/00
Filed: 1931-11-27
Abstract: 382,779. Cans &c. ROBINSON, G. A., Hillcrest, Hull. Nov. 27, 1931, No. 32874. [Class 66.] Cans, canisters, &c. of cylindrical or rectangular form are provided with tapered upper or neck portions formed separately from the bodies and seamed or otherwise secured thereto. The tapered upper portions are produced from rectangular blanks by first forming them into tubes and subsequently contracting one end of the tube to form the neck, either by the formation of pleats or folds 2 therein, as shown in Fig. 2, or by slitting the tube, and pressing the slit portions inwardly so that they overlap, as shown in Figs. 5 and 8, the pleated or overlapped parts being soldered or otherwise secured together. Specifications 371,959, 372,244, and 372,254 are referred to.
Patent GB-832851-A (GB)
Title: Improvements in or relating to electrical generator regulating systems especially for mechanically propelled vehicles
IPC: H02J7/16
Filed: 1957-10-22
Abstract: 832,851. Automatic voltage control systems. BOSCH G.m.b.H., R. Oct. 22, 1957 [Nov. 3, 1956], No. 32879/57. Class 38 (4). In a voltage regulating arrangement for a generator A having a shunt field F, a transistor T1 connected in series with the field is arranged, by being connected to form with a second transistor T2 a relaxation oscillator, to interrupt the field periodically in accordance with the output voltage which is thus maintained constant. The transistor T2 is controlled by the output from a bridge comprising resistors R7- R11 at least one of which is non-linear, R11 being a low series resistance in the load path whereby current compensation is applied to the bridge. R 11 may comprise a forwardly directed rectifier which may serve also to prevent reversal of current. Resistors R8 and R9 may both be non-linear and comprise cells of cadmium and cadmium oxide, and nickel with an oxygen permeable separator.
Patent GB-1019758-A (GB)
Title: Pressure wave machine
IPC: F04F13/00
Filed: 1964-08-12
Abstract: 1,019,758. Pressure exchangers. BROWN, BOVERI & CO. Ltd. Aug. 12, 1964 [Aug. 14, 1963], No. 32903/64. Heading FIN. The rotor of a pressure exchanger, Fig. 1 (not shown), rotatable in a fixed housing comprising end plates 14 and a middle part 9, is constructed in such a manner that its axial length is maintained substantially constant irrespective of its temperature. The rotor is formed from two parts each comprising a hub portion 4, a shroud portion 3 and circumferentially spaced cells 1 connected therebetween at points 7. The two parts are assembled together with the cells 1, 1<SP>1</SP> in intervening relationship whereby unrestricted expansion of the cells can occur from the fixed points 7. The hub portions 4, 4<SP>1</SP> and the shroud portions 3, 3<SP>1</SP> each have an overlapping joint 8 to allow for expansion. The expansion of a shaft 5 secured to the hub 4, 4<SP>1</SP> is minimized by passing coolant therethrough or by manufacturing the shaft from a material having a low coefficient of expansion or from a bimetallic structure. The fixed housing end plates 14 are maintained in substantially fixed spaced relationship by bolts 10 situated outside the pressure exchanger, and the middle part 9 is provided with a corrugated part 11 to compensate for expansion. Figs 2-4 (not shown) depict modified cell constructions and Figs. 5-7 (not shown) depict methods by which the manufactured axial length of the rotor may be altered.
Patent GB-991716-A (GB)
Title: Escapement mechanism for measurement marking and inscribing machines
Inventor: BUTTER OTTO
IPC: B43L13/00
Filed: 1962-08-28
Abstract: 991,716. Typewriters. PFAFF PLASTIC GESELLSCHAFT FUR INDUSTRIELLE TECHNIK m.b.H. Aug. 28, 1962, No. 32976/62. Heading B6F. Type-bar machines for writing on drawings; letter - spacing mechanism. - A letter - spacing mechanism for the type carriage of measurement marking and inscribing machine comprises a fixed carriage rack 13, Fig. 1, mounted on a guide rail resting on a drawing board (not shown) an axle 5 extending parallel to said rack, a first rocking arm 15 having a stepping pawl 16 and a second rocking arm 6 having a locking pawl 7, said stepping pawl 16 and locking pawl 7 being arranged for alternate co-operation with said carriage rack. In operation initial depression of a type key 2, Fig. 2, engages a rail 24 which displaces an element 25 to thereby pivot the rocking arm 15 whose pin 23 engages the rocking arm 6 so as to disengage the locking pawl 7 from the rack 13. Further depression of the key results in the engagement of the stepping pawl 16 in a tooth space of the rack 13, whereby a pin 18 sliding on a cam face 21 of a guide 19 integral with a bearing block 3, displaces the rocking arm 6 with its pawl 7 axially by one tooth space. During continued axial displacement the pin 23 finally glides off the rocking arm 6 so that its pawl 7 will be forced into renewed engagement with the rack 13 under the action of spring 11. When subsequently the key 2 is released the rail 24 will return to its original position and the stepping pawl 16 on the rocking arm 15 disengaged by a torsion spring 17 which at the same time will displace the arm 15 axially into its original position in which it bears against the retaining ring 8 of the arm 6. Back-spacing mechanism.-The back-spacing mechanism is similar to the letter-spacing mechanism above and comprises a back-spacing pawl 28 mounted on a third rocking arm 27, Fig. 1, co-operating with the arm 6 and pawl 7, said arm 27 being displaced by a backspacing key (not shown).
Patent GB-321560-A (GB)
Title: Improvements in or relating to thermionic amplifier circuits
IPC: H03H7/01
Filed: 1928-11-12
Abstract: 321,560. Dicker, S. G. S., (Naamlooze Vennootschap Philips' Gloeilampenfabrieken). Nov. 12, 1928. Thermionic heterodyne, receivers.- Heterodyne frequencies are amplified with the aid of inter-valve transformers T1, T2 with closely coupled tuned primary 1 and secondary windings, and first transformer T1 is connected in the a portion only of the primary of the output circuit of the preceding detector D1. The intermediate-frequency amplifying valves VI, V2 are of the screened-grid type.
Patent GB-976534-A (GB)
Title: Cyclic 2,3-o-acetals and 2,3-o-ketals of butanetetrol esters
Inventor: FEIT PETER WERNER
IPC: C07D317/24
Filed: 1961-09-15
Abstract: The invention comprises the racemates and stereoisomers, including the mesoisomer, of cyclic 2, 3-o-acetals and 2, 3-o-ketals of butane-1, 2, 3, 4-tetrol-1, 4-di(methane sulphonate) having the general formula <FORM:0976534/C1/1> in which R1 and R2 are selected from hydrogen, substituted and unsubstituted aliphatic, alicyclic, aromatic and heterocyclic groups or R1 and R2 together complete a substituted or unsubstituted alicyclic ring.  The compounds are prepared by the reaction of the particular stereoisomer of 2, 3-o-acetal or ketal of butane-1, 2, 3, 4-tetrol with methane sulphonic acid or with a reactive derivative thereof, for example, the acid anhydride or halogenide.  The reaction is preferably carried out in the presence of an acid-binding substance; tertiary amines such as pyridine are suitable. Alternatively, the compounds are prepared by condensing, under acidic conditions, the particular ketone or aldehyde, or reactive derivatives thereof, with the appropriate butane-1,2,3,4-tetrol-1,4-di(methane sulphonate) and evaporating off the water or volatile compound eliminated. Compounds prepared in examples include 2, 3, o-methylene-L-threitol-1, 4-di(methane sulphonate), 2, 3, o-isopropylidene-erythritol-1,4-di(methane sulphonate), 2, 3, o-benzylidene-L-threitol-1, 4-di(methane sulphonate), 2, 3, o-cyclohexylidene-D-threitol-1, 4-di(methane sulphonate), 2, 3-o-phenylethylidene-L-threitol-1,4-di(methane sulphonate), 2, 3-o-ethylidene-D-threitol-1, 4-di(methane sulphonate), 2, 3-o-trichloro-ethylidene-L-threitol-1, 4-di(methane sulphonate, 2, 3-o-tribromo-ethylidene-L-threitol-1, 4-di(methane sulphonate, 2, 3-o-furfurylidene-L-threitol-1, 4-di(methane sulphonate) and 2,3-o-chlorobenzylidene-L-threitol-1, 4-di(methane sulphonate). The compounds of the invention are effective against rat tumours and leukaemia. They may be subjected to solvolysis to form butane-1, 2, 3, 4-tetrol-1, 4-di(methane sulphonates). The 2, 3-o-acetals and ketals of the tetrols are conveniently prepared by the reduction of the corresponding stereoisomers of the 2, 3-o-acetals or ketals of a 1, 4-diester of tartaric acid by lithium aluminium hydride.  The diesters themselves are prepared by condensing the appropriate aldehyde or ketone with a diester of tartaric acid, e.g. diethymesotartrate, obtained by reacting ethanol with the acid using methyl sulphonic acid as a catalyst. The ketals may also be prepared by the direct condensation of the ketone with the butane tetrol in the presence of an acid. The preparation of the butane 1, 2, 3, 4-tetrol-1, 4-di(methane sulphonates) is described in Specification 896,052.  Specification 891,466 also is referred to.  Reference has been directed by the Comptroller to Specification 891,466.
Patent GB-318792-A (GB)
Title: Improvements relating to starting gates for race-courses
IPC: A63K3/02
Filed: 1928-11-15
Abstract: 318,792. Mauchan, C. B. Nov. 15, 1928. Brakes, periodic.-In a starting gate for race courses comprising two masts and a tape, each mast has tape-actuating mechanism comprising a weight motor raising a tape-carrying arm vertically, electrically and manually operable means for releasing the motor and friction braking means which act automatically during the rise of the tape to arrest the motor gradually. Fig. 1 shows the lower part of one of the masts; the tapecarrying arm 33 is inserted in a chain 32 passing round an upper sprocket and a lower sprocket 3. Wrapped spirally round the shaft 4 of this lower sprocket is another chain 16 which passes between guide pulleys 18 and round a pulley 19 on a weight 20 to a fixed point 21 on the mast. The sprocket 3 is normally held by a pawl 91 on the armature lever 90, 88 of a magnet 85, 87 so that when the latter is energized from a switch in the starter's pocket, the weight 20 drops rapidly on guide rods 28 and rotates sprocket 3 to raise the tape. A sleeve 45, Fig. 5, is rotated with the shaft 4 of sprocket wheel 3, but is movable axially thereof against springs 62, 63. In screw-threaded engagement with the outside of sleeve 45 is a nut. 50 rigid with a disc 51 bearing an annular braking member 52 which contacts with the back surface of wheel 3. An arm (not shown) hinged to the mast and to a lug 53 of the disc 51 prevents rotation of the latter so that as the tape rises the sleeve 45 rotates and the nut 50 is threaded forward until the surface 52 reaches the wheel 3 and commences to brake it. Thereafter the sleeve 45 moves axially against the springs 62, 63, so that the latter apply increasing pressure to the braking surfaces until the wheel 3 is arrested as the tape reaches its upper limit. The weight chain 16 is attached to the pin 12 in the shaft 4.