baber/WOPTO huggingface dataset:
Patent GB-420832-A (GB)
Title: Improvements in or relating to radio-goniometers and like devices
IPC: G01S3/42
Filed: 1933-06-09
Abstract: 420,832. Directive wireless signalling. FITZHERBERT, H., and COALES, J. F., H.M. Signal School, Royal Naval Barracks, Portsmouth. June 9, 1933, No. 16505. [Class 40 (v)] [See also Group XXXVIII] In an electrical instrument, a search element is operated automatically to search for a predetermined condition in order to indicate variations of that condition. In the system shown, the coil G of a goniometer is driven automatically by a motor into a position corresponding to the direction of an incoming wireless-beam relative to the directive aerials F, B. If the relative direction alters, an E.M.F. is generated in G and is amplified and rectified in A, M, D and then applied to the primary of a transformer supplying a valve which controls a relay S. The arrangements are such that when the rectifier current is increasing the induced E.M.F. in the secondary of the transformer is in a direction such that the valve grid is rendered positive and the relay S is operated. Decreasing currents, on the other hand, cause negative bias on the valve and the relay S is rendered inoperative. Relay S operates a ratchet switch R, the contacts of which are connected alternately to relays controlling the reversing switch P of the motor which controls the coil G, and the arrangement is such that the coil G is operated until the detected current is wiped out. The system may be applied to instruments operated by other types of energy, such as light, heat or sound.
Patent GB-568590-A (GB)
Title: Improvements relating to the mounting of lenses or other optical elements
IPC: G02B7/02
Filed: 1943-10-08
Abstract: 568,590. Mounting lenses. HASSELKUS, J. W., and RICKETS, W. T. Oct. 8, 1943, Nos. 16523 and 21542. [Class 97 (i)] In a method of securing an optical element in its mounting the element is held lightly against an abutment in the mounting and the space bounded by the mounting and the edge of the element filled with an easily fusible metal. As shown, Fig. 1, a compound lens a is held against an abutment c in a lens mount b by a sleeve d which has at its lower end an external chamfer j. Wood's metal h in a molten condition is injected through a hole i in the mount to fill the space between the lens, the mount and the chamfer ; the sleeve being removed after the metal has solidified. In a modification, Fig. 3 (not shown) the lens mount has a screw-threaded extension on to which is screwed the threaded ring k having a flange arranged to rest with peripheral clearance on a ledge m of a secondary mount n. The mount carrying the lens may be adjusted radially and axially in the secondary mount before securing in position by Wood's metal.
Patent GB-675900-A (GB)
Title: Improvements in automatic gramophone record changers
IPC: G11B17/02
Filed: 1950-07-03
Abstract: 675,900. Automatic gramophones. ERIKSON, B. July 3, 1950. [July 2, 1949] No. 16551/50. Class 40 (ii). In an automatic gramophone a control-disc has a toothed periphery and a gap therein in which a rotating gear member idles while records are played during which the leading tooth on the control-disc is moved into contact with the gear member but is moved back at each revolution of said gear member until the control disc is moved at greater velocity, whereby engagement of the gear member and the teeth of the control-disc is effected to start an automatic cycle. During playing of a record the gear member in the form of a screw or propeller like member 6, driven by a shaft 19 which is continuously rotated by a friction pulley 18 in engagement with the underside of the turntable, idles in a notch 52 of a toothed wheel 1 which is coupled to a cam-disc 5 by friction and limited in its relative movement by a pin 8 and slot 7. As the pick-up arm is fed slowly across the record, a surface 3 on an arm 2 mounted on the pick-up arm shaft presses against a pin 4 on the camdisc 5 so that the first tooth of the wheel 1 engages the leading edge of the screw 6, whereby the wheel 1 is set back a small amount in relation to the cam-disc 5 at each revolution of the shaft 19, until the accelerated movement at the end of the record causes the screw 6 to fully engage the teeth of the wheel 1 to start an automatic cycle. The pick-up arm is lifted by a cam on the disc 5 and a rod 17, while the pick-up arm is swung outwardly by the engagement of a pin 9 with a surface 10. on the arm 2. At this. point a record is unseated from a step on a centre post 50<SP>1</SP> by a member 12 on a right angled rod 13 which is mounted in a bearing 11<SP>1</SP> and moved by the pin 8. In the meantime, the pin 4 has passed behind the surface 10 and acts upon the surface 15 to move the pick-up arm over the edge of the record, and is in this position when the pin 4 is clear of the point 16. At this moment the pick-up is lowered on to the record, after which the notch 52 arrives at a position in which the screw 5 idles again therein. When the last record falls to the turntable, a member 21 presses a rod 22 against the action of a spring 23 so that the end 24 of the rod 22 engages a forked end 25 of a lever which operates a switch 28 when the pin subsequently engages the end 24 of the rod 22.
Patent GB-736918-A (GB)
Title: Improvements in aerials
Inventor: STRAFFORD FREDERICK RICHMOND W
IPC: H01Q5/49
Filed: 1953-06-16
Abstract: 736,918. Aerials. BELLING & LEE, Ltd. April 29, 1954 [June 16, 1953], No. 16599/53. Class 40 (7). An aerial for the reception of two signals of differing frequencies polarized at right angles to one another consists of a first halfwave dipole for operation at a first frequency and a second half-wave dipole for operation at a second frequency supported along the length of, and at right angles to, the first. Either or both dipoles may be provided with parasitic elements. In a simple embodiment (Fig. 1, not shown) the first horizontal dipole 1 is supported centrally on top of a mast 3 by means of an insulator 2 and carries mounted at one of its extremities the second vertical dipole 6 supported in insulator 4. A parasitic reflector rod 7 for the second dipole may be supported at the other extremity of the first by means of another insulator 5. All these units are shown in Fig. 2 together with an arrangement of two director rods 10 and 11 and one reflector 9 for the first dipole. The dipole 6 and reflector 7 need not be mounted at the extremities of the arms of the dipole 1 but may be mounted at positions along its length (Fig. 3, not shown). The elements 6 and 7 may lie in a horizontal plane and at right angles to dipole 1 instead of being arranged vertically. Specification 700,928 is referred to.
Patent GB-403417-A (GB)
Title: Improvements in or relating to machines for pressing and shaping pickers for looms
IPC: D03J3/00
Filed: 1932-06-13
Abstract: 403,417. Embossing-machines. LORD, T., Todmorden Hall, Todmorden, Lancashire. June 13, 1932, No. 16624. [Class 100 (ii).] In a machine for pressing and shaping pickers for looms, of the kind provided with a pressing and shaping die comprising movable top, side, and front parts adapted to receive pressure from vertical and horizontal rams actuated by means of cams, the top, side, and front parts of the die are acted upon by separate rams, each of which is operated through the medium of a lever by a complementary cam. The side dies 6 are moved laterally by pairs of wedges 8, 9, of which the wedges 9 are operated by rams 10. The front die 7 is operated by a centre ram 11, and a loose cover plate, which is placed on the top of the dies 6 and 7, is adapted to be pressed down by a pivoted rocking lever. The rams 10, 11 and this rocking lever are operated by levers 14, 15, 16, respectively, pivoted on a common fulcrum 17, and actuated by cams on a shaft 21, which are so timed and are of such length that the rocking lover is first operated to apply pressure to the cover plate, after which the rams 10 operate the dies 6, and finally the ram 11 applies pressure to the die 7. The pressure is maintained for a time corresponding to the lengths of the cams, when the dies 6 and 7 are released and then pressure on the cover plate is removed. The shaft 21 is driven through a clutch from a driving-shaft. The clutch may be manually or automatically controlled ; in the latter case, an adjustable member on the cam shaft 21 may operate a stop mechanism, either at the completion of the pressing operation or before, so that the pressure may be maintained for a longer period of time than that provided by the dwells of the cams. The operation of the clutch to start the rotation of the cam shaft is preferably manually effected. The wedges 8 may bear against plungers 25 which are acted upon by springs 26, which serve to take up excessive pressure of the rams 10, and all the pressure-applying members may be returned to their normal positions by springs.
Patent GB-1221502-A (GB)
Title: Vacuum dryer shelf temperature control
Inventor: COSTELLO LEONARD C
IPC: F26B23/10
Filed: 1969-03-31
Abstract: 1,221,502. Vacuum drying apparatus. HULL CORP. 31 March, 1969, No. 16643/69. Heading F4G. In vacuum drying apparatus of the type in which vertically spaced hollow shelves 28 in a casing have heated fluid flowing through them, the fluid is fed to and received from the shelves 28 by two vertical manifolds 44, 46 communicating with the shelves inside the casing, having an adjustable valve 52 for connecting either one manifold with the outlet conduit 54 of a heated fluid source and the other manifold with the return conduit 56 or vice versa. An electric solenoid valve 52 has two positions determined by the setting of switch 60 which is controlled by timer 64. In one position the outlet conduit 54 of the heated fluid source is connected to manifold 44; the fluid flows through the shelves 28 along a sinuous path and returns through manifold 46 to the return conduit 56. In the second position the outlet conduit 54 is connected to manifold 46 and the fluid flows in the opposite direction through the shelves 28. In a second embodiment (Fig. 5, not shown), the outlet conduit (74) is connected to the top of manifold (44) and the return conduit (76) to the bottom of manifold (46) by rotatable circular valves (70), (72). The valves are ganged together and by rotating clockwise through 90 degrees the connections are reversed and the fluid flows through the shelves in the opposite direction. In a freeze drying process, the heated fluid may be preceded by a refrigerant which freezes the material on the shelves before drying.
Patent GB-852760-A (GB)
Title: Improvements in electric switch mechanism and contact arrangements therefor
Inventor: DAHLGREN JOHN VICTOR STANLEY
IPC: H01H1/20
Filed: 1958-05-23
Abstract: 852,760. Thermal switches; switch contacts. WILCOLATOR CO. May 23, 1958, No. 16674/58. Class 38 (5). A switch of the kind wherein a fluid in a remote chamber expands to pass along a capillary tube and operate a diaphragm to move an actuating lever and cause a tension coil spring to give a switch arm a snap-action (Fig. 1, not shown), has moving contacts 67 arranged to bridge fixed contacts 56 (Fig. 4) with a rolling and wiping action. An insulating member 40 riveted to the snap-acting switch arm (not shown) carries a cage 64 secured by parts 70 passing through holes 72 in member 40. A bridge member 66 carrying contacts 67 is retained in cage 64 by lugs 86 and 88 accommodated in openings 80 and 84 respectively in the legs 78 and 82. The central parts of cage 64 and bridge 66 are indented as shown in Fig. 2 to maintain a spring 92 so as to urge bridge 66 upwardly and to the right. The opening 80 (Fig. 5) and the bottom of opening 84 (Fig. 4) are shaped to act as pivots for self-alignment of bridge 66 when spring 92 is compressed by contacts 67 engaging contacts 56. The opening 84 is flat at the top so that bridge 66 is maintained level when the contacts are out of engagement. As spring 92 is compressed by engagement of the contacts the lug 88 of the bridge 66 moves downwards in opening 84 and contacts 67 have a rolling action against contacts 56. There is also a camming action of the edge surfaces 94 of bridge 66 against the inclined leg 82 of the cage 64, which moves the bridge 66 laterally to the left (Figs. 2 and 3). This frictional sliding action tends to reduce bounce and arcing of the contacts. When the member 40 moves downwardly to open the switch the first movement of the bridge 66 is a tilt as lug 88 rides up to the top of opening 84 and this breaks any slight welding of the contacts. Adjustment of the temperature at which the switch operates is obtained by rotation of a threaded spindle which moves the whole snap-action mechanism with respect to the thermally operated diaphragm.
Patent GB-277766-A (GB)
Title: Improvements in and connected with stop valves, turn-cocks and the like
IPC: F16K1/02
Filed: 1926-07-02
Abstract: 277,766. Goble, J. July 2, 1926. No Patent granted (Sealing fee not paid). Lift valves; actuating-mechanisnm.-In a screwdown stop valve the screwed lower end of the spindle A6 engages directly with the sliding sleeve-like valve member C which is closed at its lower end and provided with an internal unthreaded recess at the bottom into which the screwed end of the spindle passes, in the open position of the valve, thereby preventing the jambing of the spindle against the bottom of the valve member. The valve member is prevented from rotating by ribs engaging grooves in the casing. Axial movement of the valve spindle. is prevented by a flange A4 thereon mounted and rotating in a recess in the casing, as shown. Specification 262,495 is referred to.
Patent GB-157487-A (GB)
Title: Improvements in hammer drills
IPC: E21B1/30
Filed: 1919-07-03
Abstract: 157,487. Potter, H. S. July 3, 1919. Percussive drills.-In a hammer drill of the type comprising a hammer piston with helical devices co-operating with a rifled nut and ratchet mechanism to effect rotation of a toolholder, the piston having hammer portions on each end and being thus reversible, the hammer portions are identical, each being provided with a number of helical grooves, projections, or the like, and a number of straight grooves, projections, or the like. The piston 17 has two extensions 18, 19, either of which may be used as the hammer member; each extension has straight grooves or ribs for engagement with straight ribs or grooves in the chuck 24, and also has helical grooves or ribs for engagement with helical ribs or grooves in the ratchet wheel 39 of the twist mechanism. The chuck is rotatably held in the front head 4 by a pin 25 engaging an annular groove 27. The ratchet-wheel 39 is duplex so as to be reversible when one end is worn by engagement with the pawls; two sets of recesses for the pawls are formed in the cylinder. Bushes 49, 38 support the piston extensions, the rear bush 49 being formed to allow passage of motive fluid to act on the end of the rear extension. A further bush 77 extends into the rear cover to shut off an annular chamber which is divided by partitions into a lower lubricant chamber 71a and an upper fluid chamber 71, the latter having ports leading to the throttle valve 79 and distributing- valve chest 2. The throttle valve 79 has a cam 88 thereon adapted, simultaneously with the opening of the motive-fluid supply ports 82, 83, to depress a valve 86, Fig. 3, and so admit water from a supply pipe 106 through ports 103, 90, 91 to a central pipe 99 leading to the hollow drill 35. When in another position, the throttle valve admits motive fluid through ports 111, 110, the central tube and the hollow drill to the bore-hole. The tool may be provided with a handle and the motive-fluid supply-pipe connected directly to the valve chest. If desired, the central tube 99 may pass through a gland 114, Fig. 8, in the rear cover and be directly connected to a water-pipe 116. Specification 156,475 is referred to.
Patent GB-1311343-A (GB)
Title: Bis-imide compounds and polymers therefrom
IPC: C08F22/36
Filed: 1970-04-08
Abstract: 1311343 Bis-imide compounds GENERAL ELECTRIC CO 8 April 1970 [25 April 1969] 16747/70 Heading C2C [Also in Division C3] Novel bis-imide compounds of Formula wherein R is a C 1-20  divalent HC group, R<SP>1</SP> is selected from one of the following groupings and halogenated derivatives of R<SP>1</SP>; T is a member of the groupings -O.CO-, -CO.O-, -CO.NH-, -O.CO.O- and -O.CO.NH-; Q is a divalent organic radical of at least 2 carbon atoms; X is H, halogen or methyl; p and q are the same and are 0 or 1; and m is 0 or 1; are made by various methods, e.g. (1) reaction of 2 mols of a compound of Formula VI with 1 mol of a compound VII of formula HO-Q-OH. (2) Reaction of 2 mols of a compound of Formula VIII with 1 mol of a compound IX of formula hal-CO.Q.CO-hal. (3) Reaction of 1 mol of a compound of Formula VIII with a compound of Formula VI. (4) Substitution of the OH in VIII or one or both OH groups in VII by an NH 2  group and then reacting the latter with a compound of Formula VI or IX. (5) Treatment of a compound of Formula VIII optionally in admixture with a compound of Formula VII with phosgene or diphenyl carbonate. (6) Reaction of 2 mols of compound VIII and 1 mol of compound X of formula OCN.Q.NCO. Further treatment of compounds I yield polymers (see Division C3).
Patent GB-240936-A (GB)
Title: Swivel wrenches
IPC: E21B19/16
Filed: 1924-07-14
Abstract: 240,936. Rogers, F. H., (Goldsborough, R. M.). July 14, 1924. Rigid-jaw wrenches; handles.-A swivel wrench for screwing a well-boring bit into its supporting stem comprises a wrench jaw 16 turned by handles 36, and a supporting member 12 for the jaw, an opening being provided in both the jaw 16 and the member 12 to allow of the insertion of the drill shank 6, and segmental depressions 18 being provided in the jaw in which shoulders formed by fiats on the shank can seat. A series of rollers 28 mounted in a channel round the edge of the jaw 16 run on the supporting member 12. A lever 1 with a forked end is pivoted to the member 12 and is suspended from a derrick 3.
Patent GB-219156-A (GB)
Title: Improvements in and connected with motor cycle and cycle saddles or seats
IPC: B62J1/08
Filed: 1923-06-29
Abstract: 219,156. McGhee, G. June 29, 1923. Saddle supports.-The saddle stem A is provided with a slidablymounted plate J, adapted, when the stem A is removed from the cycle frame, to be locked at the lower end of the stem as shown, so as to support the saddle and stem on the ground to be used as a stool. The plate J is locked at the upper and lower ends of the stem A by a split collar, which is pressed bv springs into a groove A<2> and is adapted to be released by means of a key M having a conical expanding-plug.
Patent GB-1473626-A (GB)
Title: Adaptive braking system
IPC: B60T8/66
Filed: 1975-04-23
Abstract: 1473626 Anti-skid systems BENDIX CORP 23 April 1975 [29 April 1974] 16897/75 Heading F2F An electronic brake control circuit comprises means for generating a signal Vw indicative of the speed of at least one wheel, a second, reference signal Vr related to Vw and a third signal V E , the generator for the latter including first and second capacitors and the signal V E  being generated across the second capacitor. As shown in Fig. 1, Vr (curve 14) is normally less than Vw (curve 12) but can diminish only at a limited rate; if braking at time to results in Vw diminishing faster than said rate, the curves intersect (at time t 2 ) and braking is attenuated. Prior to t 2 , V E  (curve 17) is constant but the brake attenuating signal causes the charges stored in the first and second capacitors to equalize and an exponential signal is generated. The brakes are re-applied when V E  and Vw are equal and greater than Vr, i.e. at point 12a (time t 6 ). As shown in Fig. 2 the control circuit includes a speed sensor 20 and a sealer 22 which generates the speed signal Vw and further signals Vw-n and Vw+M where N and M are constants. The latter two signals are processed and applied to a memory 30 producing output signal Vr which is applied to first and second comparators 28, 38. The signals Vw and Vr are compared by comparator 28 which generates an output when the signals are equal, the output signal being supplied to a brake pressure modulator via normally open gate 34. The output from the gate is also used to trigger exponential generator 36 the output V E  of which is compared with signals Vw and Vr by comparator 38. The latter normally has an output which maintains gate 34 open; this output is interrupted when Vr is less than Vw and Vw is greater than V E , so that gate 34 is closed and braking is restored. Further circuit details, including those of the exponential generator itself, are described (Figs. 3, 4 and 6, not shown).
Patent GB-632397-A (GB)
Title: Improvements in and relating to electric filters for radio frequency oscillations
IPC: H01P1/202
Filed: 1947-06-26
Abstract: 632,397. High-frequency filters. GENERAL ELECTRIC CO., Ltd., and CLAYTON, R. J. June 26, 1947, No. 16910. [Class 40 (viii)] [Also in Group XL (c)] A filter designed to prevent the transmission of oscillations of wavelength A consists of two coaxial transmission lines, the outer conductor 22 of line 12 and 22 constituting the inner conductor of line 22 and 11 and both lines having an electrical length of A/4 or an odd multiple thereof, and the input end of one of the lines being short-circuited. In the arrangement shown, the outer line contains an airspace and a solid dielectric, whereas the inner line is filled with solid dielectric. This is desirable as the fact that one of the lines is short-circuited would otherwise cause them to have different physical lengths for the same electric length. The arrangement is shown utilized to remove the carrier frequency from the output of a crystal mixer comprising a line 12 including a crystal 29 in its inner conductor. Signals are supplied through line 15 and locally-generated oscillations through line 17.
Patent GB-1084535-A (GB)
Title: Screw thread cutting machine
IPC: B23G1/22
Filed: 1965-04-22
Abstract: 1,084,535. Machine tool details. CRI-DAN. April 22, 1965 [April 28, 1964], No. 17001/65. Addition to 949,413. Headings B3B and B3T. The lathe of the parent Specification is modified to include a pair of jaws 115, 116, Fig. 2, for centring the tube T to be cut, a roller cradle support, and a roller feed for the tube. Jaws 115, 116 are adjustable on transverse carriages 9, 10 by screws 113, 114 carried in blocks 111, 112, and are moved to engage and disengage tube T by double-acting fluid pressure pistons 121, 122. The cradle support comprises a frame 135, Fig. 4, brackets 136, 137 slidable on the frame, rollers 138, 139 carried by the brackets, and adjustable fluid pressure pistons 145, 146 for moving the brackets towards or away from tube T. A roller 106, Fig. 5, is carried by a lever 53 pivoted on a frame, and several of such levers are connected by a rod 155 actuated by an hydraulic jack 156. Each roller is driven by a motor, by means of a belt drive 108, with a tensioning roller 108<SP>1</SP>. In operation, the motors drive rollers 106, and tube T is moved through headstock 2, until it engages a stop 103, whereupon the motors are stopped. Jaws 115, 116 are moved to centre the tube, and rollers 138, 139 are moved towards the tube to support the latter. Rollers 106 are pivoted to disengage the tube, and transverse carriages 9, 10 are moved towards each other, and the tube is then gripped between jaws 115, 116, and is supported on rollers 138, 139. Chucks 4 are clamped, and jaws 115, 116 are retracted, and the work is carried out on the tube as described in the Parent Specification.