baber/WOPTO huggingface dataset:
Patent GB-1506991-A (GB)
Title: Band saws
IPC: B27B13/00
Filed: 1976-04-30
Abstract: 1506991 Sawing S J BARNES 30 April 1976 [30 April 1975] 17801/76 Heading B5L A band saw includes first and second wheels 12, 14, a frame 32, 34 for maintaining said first and second wheels in spaced relationship; the periphery of each said wheel comprising a forward rim 26, a rearward rim 25, and an intermediate felloe surface 23 defining a blade receiving groove; an endless blade 10 having a serrated first edge and a plane second edge riding in each groove with its first edge adjacent the forward rim and its second edge adjacent the rearward rim; blade guiding means 28 cooperable with the second edge to restrain the blade from passing over the rearward rim and out of said groove; the felloe surface being flat in cross-sectional view and so disposed that the length of the path of travel of the saw blade 10 is greater adjacent the forward rim than adjacent the rearward rim so as to restrain axial movement of the serrated edge of the blade towards the forward rim. In one embodiment, Fig. 3, a plane tangential to each felloe surface is parallel to the axis of rotation of the wheel and the axis of one of the wheels converges with the axis of the other in a direction rearward of said rearward rims. In an alternative embodiment, Fig. 6, a plane tangential to each felloe surface converges with the axis of rotation of its own wheel in a direction rearward to said rearward rim. The felloe surface 23, Fig. 6, may be recessed as at 24 to accommodate the toothed edge of the saw band. The saw is particularly intended for cutting joints of meat, which, after a partial cut, e.g. through a bone, may be pulled back from the blade and thereby exert a force on the blade in the direction A, the arrangement of the felloe surface preventing the teeth of the band coming into engagement with the forward rim 26. Saw guides 28, shown in detail in Fig. 5, and having a saw receiving slot 51 in a head 50 of hardened steel or tungsten carbide engage the rear edge of the blade 10.
Patent GB-611050-A (GB)
Title: Improvements in the regulation of the charge for internal combustion engines
IPC: F02M69/00
Filed: 1945-07-12
Abstract: 611,050. Regulating. JALBERT, J. H. July 12, 1945, No. 17870. Convention date, Nov. 22, 1943. [Class 7 (iii) and 7 (vi)] In an engine wherein a rich mixture is drawn into an injector cylinder 6 and injected through a valve 15 into an air charge in the working cylinder 1, the rich mixture, formed in a carburetter 11 containing a main emulsified fuel nozzle 35, Fig. 4, supplied from a float chamber, is drawn in when the auxiliary piston 7 uncovers a port 10; the amount is controlled automatically by a barrel valve 37, actuated through a rack and pinion 55, 56, Fig. 7, by a spring controlled capsule 53 subject to the pressure on the engine-side of a throttle valve 50 in the air inlet pipe 23 leading to cylinder 1 which is regutated by a hand-lever 25. Alternatively, the valve 37 may be handregulated by a lever 12 and the throttle valve 50 regulated automatically by the device 53 subject to the pressure on the engine side of the valve 37. The rich mixture is injected into the cylinder 1 at the end of the suction or beginning of the compression stroke of piston 2, the resulting mixture being ignited, after compression, by a spark plug 17. The air inlet and exhaust valves of cylinder 1 are actuated by cams on the shaft 9 of the auxiliary piston 7 which is driven at half-engine speed. A conduit 43, Fig. 4, co-operating with a channel 44, supplies diluting air at intermediate openings of the valve 37, and a slow-running nozzle 40 is provided.
Patent GB-145690-A (GB)
Title: An improved cut out switch for electric polyphase alternating current circuits
IPC: H01H73/38
Filed: 1920-06-30
Abstract: 145,690. Martinetto, V. Oct. 15, 1915. [Convention date]. Automatic circuitbreakers. - Relates to a combined minimum and maximum polyphase circuitbreaker operated by an induction-motor device. In the form shown, contacts 4 of knife-blade type are held closed against a throw-off spring 6 by a pivoted latch 15 which is biassed by a weight 20 so that it falls out of engagement when left unsupported. A facecam 21 on a vertical spindle 19 attached to a squirrel-cage induction rotor 16 supports the latch as long as the rotor exerts the necessary torque. Failure of current in any phase of the stator windings 11 allows the spindle to be twisted back by a spring 17, whereupon the latch falls and the contacts 4 open. For overload release, series windings 12, 13 attract the rotor vertically downward and move the spindle longitudinally, producing the same effect on the latch as in the other mode of release. A retarding- liquid may be placed in the box 10 which contains the motor device.
Patent GB-408203-A (GB)
Title: Manufacture of ethyl alcohol
IPC: C07C29/04
Filed: 1932-06-25
Abstract: Ethyl alcohol substantially free from ether is produced by treating a mixture of ethylene and steam with an aqueous inorganic acid, such as sulphuric or phosphoric acid, of 15 to 60 per cent strength at elevated temperature and substantially above atmospheric pressure. The pressure may be from 200 to 600 lb. or higher and the temperature 170--300 DEG  C.  The acid may contain filling materials to facilitate intimate contact, or may be absorbed in suitable carriers such as pumice or silica gel.  Small quantities of promoters such as silver, silver sulphate or lithium sulphate may be added to the acid. In an example, a mixture of one part of ethylene and two parts of steam is passed through sulphuric acid at 250 DEG  C. and 600 lb. pressure.  Specifications 368,051 and 370,136 are referred to.  The Specification as open to inspection under Sect. 91 includes the treatment of other alkylene hydrocarbons such as propylene and butylene, and states that when ether is produced as well as alcohol, it may be recirculated with the excess olefine after condensation of the alcohol or may be condensed in a second condenser maintained at a lower temperature than that in which the alcohol is condensed.  The use of pressures of one to several thousand pounds is mentioned, and an example describes the treatment of ethylene and steam with 30 per cent sulphuric acid at 255--260 DEG  C. and 1000 lb. pressure.  This subject-matter does not appear in the Specification as accepted.
Patent GB-1178726-A (GB)
Title: Phase Plates for Use in Optical Systems
IPC: G02B21/14
Filed: 1967-04-20
Abstract: 1,178,726. Optical apparatus. INTERNATIONAL BUSINESS MACHINES CORP. April 20, 1967 [April 26, 1966], No. 18167/67. Heading G2J. A phase plate 28, Fig.2, for use in phase contrast microscopy or Schlieren systems comprises two diffraction gratings 29, 30, lying in the same plane and having equal grating constants with the slits of one grating displaced relative to those of the other by a distance differing from the common grating constant. As shown applied to a phase contrast microscope, rays from a point source 21 are collimated by lens 22, pass through object 23 and form an image of point source 21 in the Fraunhofer plane 25 by virtue of lens 24. Rays diffracted by points in object 23 are focused in image plane 27 by lenses 24, 26, and are collimated when impinging on phase plate 28 positioned in the plane 25. It is shown in the Specification that phase shift occurs in the images formed at the various orders of diffraction which is independent of wavelength. However the angle of the diffracted ray is wavelength dependent, and this causes chromatic aberration unless the source is monochromatic. To avoid this and allow polychromatic sources to be used, an additional grating (84, Fig.8, not shown) may be provided and a mask (80) positioned in the intermediate image plane (27) to select the particular order of diffracted image which required (e.g. -1 order). The final image is then free of chromatic aberration. The additional grating (80) has the same effective grating constant as gratings 29, 30, i.e. if the collimating lenses (82, 86) associated therewith are of the same focal length as lenses 24, 26, the grating constant is the same but if the focal lengths are different the slit spacing is varied to maintain the same effective grating constant. If it is desired to control the relative amplitudes of the direct and object diffracted beams this may be done by varying the slit widths in the two diffraction gratings 29, 30, but retaining the same grating constant, i.e. the spacing between centres of the slits. As applied to a Schlieren system, Fig. 6, (not shown), the two gratings forming the phase plate are side by side instead of being one within the other as in plate 28. To eliminate chromatic aberration a third grating may be also provided, Fig. 9 (not shown).
Patent GB-647441-A (GB)
Title: Improvements in or relating to transmission mechanism
IPC: F02N15/00
Filed: 1948-07-06
Abstract: 647,441. Toothed gearing. BENDIX AVIATION CORPORATION. July 6, 1948, No. 18176. Convention date, July 30, 1947. [Class 80(i)] [Also in Groups XXVII and XXXIV] In a transmission mechanism comprising a driving member 110, rotatable driving means, such as the starter motor 28, and means, shown as planetary gearing, screw-shaft 106 and nut 98, responsive to rotation of the means 28 to move the member 110 intc engagement with a driven element, such as the engine element 112, wherein the rotation responsive means includes a first element, for example the orbital gear 64, which is brought to a stop by engagement of member 110 with element 112, and a second element, such as the planet carrier 60, which continues to rotate with the driving means 28 after the engagement, there is provided means, shown as a cam 124, rollers 130 and shoes 122, responsive to a predetermined speed of the driving means 28 after the engagement to stop the rotation of the second element 60 and to cause rotation of the driving means to be transmitted to member 110 through the intermediary of the first element 64. When the motor 28 is energized, the rotation of its shaft 30 is transmitted, through step-up epicyclic gearing 42, 38 and 36, respectively, to a flywheel 50 and directly to a sun gear 66. Whilst the flywheel 50 is being brought up to a predetermined speed, the rotation of epicyclic gearing 66, 62 and 64, the sun gear 66 being fixed to an extension 54 of shaft 30, and two further stages of similar gearing drives the nut 98 through an adjustable multi-plate friction clutch 100, and causes leftward movement of the screwshaft 106, splined to the member 110, and hence by means of spring 118 traverses member 110 into mesh with the element 112, whereupon rotation of orbital gear 64 ceases. The planet gears 62 are supported by the carrier 60 journalled upon the shaft extension 58, the carrier being extended radially to form the cam 124 on which, by means of rollers 130, are carried the shoes 122, the assembly constituting a centrifugal clutch. The shoes 122 have shoulders normally held in engagement by garter springs 128 with similar shoulders on the cam under which conditions the clutch is disengaged. When the flywheel attains its predetermined speed the shoes 122 move outwardly and engage a drum 120, which is part of the starter casing, thus stopping rotation of carrier 60 and causing sun gear 66 to rotate planets 62 and orbital gear 64, which rotation is transmitted through the remaining gears to member 110. When the shoes grip the drum 120 all the stored energy of the flywheel and other rotating parts is transmitted to the member 110.
Patent GB-918031-A (GB)
Title: An improvement in or relating to heat treatment apparatus
Inventor: HARRISON GEORGE WILLIAM HORNCY
IPC: H05B6/06
Filed: 1960-05-24
Abstract: 918,031. Induction heating. BROWN INDUSTRIES Ltd., DAVID. Aug. 23, 1961 [May 24, 1960], No. 18196/60. Class 39 (3). [Also in Group XXXVIII] In the heat treatment of workpieces by highfrequency induction heating, the heating effect at different parts of the surface of the workpiece is varied by varying the current fed to the inductor and/or the speed of relative movement between the workpiece and the inductor. As described, the teeth of a toothed member 10 are successively heated by an inductor 13 carried by a member 11 reciprocated by a lead screw 12. The member 12 contains a transformer connected to a high-frequency generator 15 connected via a rectifier 20 to a variable transformer 17 fed from the A.C. supply 19. The sliding arm 16 of the variable transformer 17 is controlled by a cam mechanism 24 on the shaft of an electric motor 23 connected to the mains 19 via a switch 22 closed at predetermined times by a process timer 21. The intensity of the heat set up by the inductor is determined by the setting of the process timer which may be such as to avoid localised build-up of heat at the ends of the teeth of the member 10. To the same end the lead screw 12 may be driven by a variable speed motor controlled by the process timer.
Patent GB-383226-A (GB)
Title: Improvements in or relating to devices for applying sealing wax
IPC: B43M1/00
Filed: 1932-06-28
Abstract: 383,226. Sealing. WESTER, D. V., 108, Hornsgatan, Stockholm. June 28, 1932, No. 18291. [Class 146 (ii).] A device for applying sealing wax comprises a tubular receptacle 14 for the wax, provided in its bottom wall with an exit-opening 17 for the melted wax, and a sleeve-shaped holder 5 in which the receptacle 14 is rotatably mounted and which is provided with a bottom wall having an opening 13 adapted to correspond to the opening 17 upon rotation of the receptacle 14, together with a means for heating the receptacle. The heating means consists of a wick 3 communicating with a reservoir 1 con. taining alcohol, and an arm 4 attached to the reservoir 1 provides a support for the holder 5 which is adjustably held thereon by a nut 7. The receptacle 14 and holder 5 are united by a central screw-threaded pin 18, fixed to the receptacle and extending through an opening in the holder 5, and a co-operating washer 19 and bolt 20. A pin 22 attached to the receptacle 14 and moving in a notch 21 on the holder limits the extent of the rotation at the open and closed positions. In a modification, an auxiliary valve is provided, comprising a rotating disc mounted on the outer end of the holder 5, and having a cut-away portion adapted on rotation to coincide with the openings 13, 17. The disc, holder, and receptacle may be pressed together by a spring mounted between the nut 20 and the disc ; and ring members may be provided on the receptacle 14 which engage the inside of the holder 5 and prevent undesired movement. Suitable heatinsulating material may be mounted between the lower ring member and the holder and between the holder and the disc.
Patent GB-110068-A (GB)
Title: Improvements in Hand Grenades.
Inventor: GIBBONS FRANCIS JOSEPH JAMES
IPC: F42B12/20
Filed: 1916-12-21
Abstract: 110,068. Gibbons, F. J. J. Dec. 21, 1916. Projectile fuses and apparatus for setting.- Consists in forming in the head of the striker C of a "Mills" grenade a deep notch c extending approximately to or beyond the axis of the striker. The square end of the lever B engages in this notch and thus cannot be disengaged prematurely. A notch c<1>, Fig. 5, is formed in the lower end of the striker, to facilitate cocking. For this purpose, a screwdriver shaped projection e on a post E fixed to the assembly-bench is adapted to engage in the notch c<1>.
Patent GB-146416-A (GB)
Title: Improved piston for quick-running internal combustion engines
IPC: F01P1/04
Filed: 1920-07-02
Abstract: 146,416. Mõdler, F. L. April 8, 1918, [Convention date]. Pistons, cooling.- Pistons for internal-combustion engines are made with an aluminium &c. bottom provided with cooling-ribs. Air is circulated through fixed pipes g, h, over which the piston reciprocates. The aluminium bottom d is screwed into the piston and secured by burring over the end of the screw thread. The air circulated is thus free from oil-vapour &c. contained in the crank-casing.
Patent GB-263690-A (GB)
Title: Hanger for towels and similar articles
IPC: A47K10/10
Filed: 1926-07-23
Abstract: 263,690. Gerin, H. F. May 10, 1926, [Convention date]. Brackets.-A towel &c. hanger consists of a horizontal rail 3 and a pair of springy jaws 6, 7 between which a corner 9 of the towel &c. is forced after being passed over the rail 3. In the construction shown the rail 3 and one jaw 6 are formed of one length of wire and the jaw 7 by a second length. The wires may project from a baseboard 1 or they may be bent for fixing direct to the wall &c. The device may be formed of a single length of wire.
Patent GB-1498682-A (GB)
Title: Stowable drinks cabinet for a motor vehicle
IPC: B60N3/10
Filed: 1975-05-02
Abstract: 1498682 Drinks cabinet for vehicles I DI GIOVANNI 2 May 1975 [6 May 1974] 18500/75 Heading B7J A container 130 for drinks is slidably mounted beneath the dashboard 110 of a vehicle, the container being pivotably mounted on its slide 14 whereby it may be moved between a horizontal stowed position beneath the dashboard (Fig. 1) and an operative vertical position in front of the dashboard (Fig. 3). The container is pivotally mounted on a member 17 having rollers 18 engaging the side edges of slide plate 14 attached to the dashboard. The container is held in its stowed position against the action of springs 21 by a catch 25 pivotally mounted on the slide plate and engaging a projection 27 on member 17. To release the container, it is moved inwardly whereby an abutment 29 pivots a member 31 to disengage the catch 25 from projection 27, and released whereby the container moves outwardly under the action of springs 21 and pivots into its operative position under the action of a spring 20. Alternatively, the container is moved between its extreme positions by electric motors controlled by limit switches. The bottles are retained in position in the container by spring-loaded caps engaging the tops of the bottles.
Patent GB-515558-A (GB)
Title: Improved occasional table
IPC: B60N3/00
Filed: 1938-06-22
Abstract: 515,558. Occasional. tables. BREXTON, Ltd.; and BROOKES, T. J. June 22, 1938, No., 18503. [Class 52 (v)] In an occasional table for suspension on a seat-back, particularly in motor vehicles, the table top 1 is connected by linkages 4 to suspension members 6 having engagement hooks 7. Studs 13 on the table top 1 engage with any pair of a line of notches 15 for adjustment of the table. The inner edge of the table is preferably concave to conform to the seat-back contour, and the table top 1 has a ledge 14.
Patent GB-1495413-A (GB)
Title: Cameras
IPC: G03B13/02
Filed: 1975-03-04
Abstract: 1495413 Retractable camera assemblies W HAKING INDUSTRIES (MECHANICS & OPTICS) Ltd 4 March 1975 [10 Jan 1975] 18671/77 Divided out of 1495411 Heading G2A The description and drawings are identical with those of Parent Specification 1495411, but the claims are directed to the covering over, in the closed position of Fig. 1, of the two lens portions of the view-finder (21, 23), Fig. 3 (not shown), by portions 24 and 8e of the main section, and the covering over of the shutter release button 13 on the main section by the housing 10 of the viewfinder section.
Patent GB-687710-A (GB)
Title: Improvements in or relating to annealing of sheet metal
Inventor: UNGERER FRITZ
IPC: C21D9/46
Filed: 1951-08-09
Abstract: 687,710. Straightening. LOO, R. VAN. Aug. 9, 1951, No. 18754/51. Class 83 (iv). A metal sheet prior to its introduction into an annealing furnace, to eliminate internal stresses due to rolling, is preliminarily straightened by a straightening machine or other device, and is hot straightened after leaving the furnace. The sheet 7 is fed through a roller leveller 1 into an annealing furnace 2 with roller table 8 and balanced doors 10 and from the furnace to a second roller leveller. The entry and exit openings 9 of the furnace are closed by adjustable spring-pressed rolls 13, 14 enclosed in a casing 15 bearing tangentially on the straightening rolls to prevent escape of gas from the furnace.
Patent GB-1179283-A (GB)
Title: Improvements in or relating to Microwave Pulse Generators.
Inventor: CROWELL MERTON HOWARD
IPC: H03K3/80
Filed: 1967-04-25
Abstract: 1,179,283. Amplitude modulation. WESTERN ELECTRIC CO. Inc. 25 April, 1967 [2 May, 1966], No. 18892/67. Heading H3R. A microwave pulse generator comprises means for establishing a plurality of microwave oscillating modes each separated by the same constant frequency, means for providing gain at each of the modes, means for combining the modes, and means for modulating the modes at the mode separation frequency. In Fig. 1 the cavity resonators 11 are each connected in series with a negative resistance element 12 such as an Esaki diode to form an oscillator, the frequencies of the oscillators being spaced apart by a frequency f 0  and the oscillators being connected in parallel. A modulator 13 in parallel with the oscillators is modulated at frequency f 0 , and this is shown to produce a pulse train at frequency f 0 , the width of the pulses being inversely proportional to the number N of oscillators. The modulator may be a diode operated either as a variable resistance or as a variable capacitance. In another arrangement, Fig. 3 (not shown), one end of a transmission line is connected to a negative resistance and the other end to a reflecting termination including the modulator and the load; in this case the mode separation frequency f 0 is inversely proportional to the length of the line and the number of modes N is determined by the bandwidth over which the negative resistance element will provide gain.