baber/WOPTO huggingface dataset:
Patent GB-225600-A (GB)
Title: A new or improved photographic enlarging, reducing, reproducing and printing apparatus
IPC: G03B27/32
Filed: 1923-11-29
Abstract: 225,600. Gooderham, G. F. R., and Carpio, T. C. Nov. 29, 1923. Printing-apparatus; colotir photography; studio accessories. - A cabinet apparatus is described having alternative fittings enabling it to be used for various purposes such as enlarging or copying opaque objects or transparencies, contact printing, direct or stereoscopic photography, taking several photographs simultaneously, colour photography or radiography. The cabinet 3, Figs. 2, 3, and 4, has a hinged door 9; a glass panel top 6 and lid 5; a vertically adjustable lens board 11; a bellows 14, lens panel 12 and frame 13 which are removable; and a vertically adjustable light chamber 8 with a removable top 15 and a hinged door 9. On the underside of the top 15 are fitted a displaceable central bulb 17, and four bulbs surrounding a depending shield 18. A condenser is carried by a removable panel 43 on the top 15. Transparencies carried by the frame 13 which also carries a removable diffusing screen, may be projected with the condenser and central bulb, or by reflected light using the four bulbs 15 and with or without the condenser. Opaque objects placed on the bottom 10 of the chamber 8 may be illuminated by the bulbs 16 for projection. The bottom 7 of the cabinet as well as the bottom 10 is removable and the cabinet may be mounted on a surgical table for medical and surgical work or for radiography; or the cabinet may be mounted by trunnions 53, Fig. 11, on a support 54 so as to be usable in a horizontal position for direct photography. Stereoscopic photographs may be obtained* by substituting a pair of lenses and a double bellows for the single lens 12 and bellows 14, or several photographs may be obtained by substituting a panel fitted with a number of lenses on the lens board 11. Colour photographs may be obtained by substituting a multicolour screen for the glass panel 6. Red and orange bulbs 40, 41 are fitted on the lens carrying board for inspection purposes on the panel 6, and either or both may be used according to the sensitive material employed. The light chamber 8 is mounted on a slide 19, Figs. 3 and 4, which is adjusted in guide ways 23 by rack and pinion 22, 20 from the external handle 21, and it may be clamped in any position by a clamping bolt 25. The lens board 11 is carried by an inner panel 27 slidably adjustable on an outer slide 28 to which it may be clamped by an inner clamping nut 31. The outer slide 28 is vertically adjustab.e in guideways 35 by rack and pinion 32, 34 from the external handle 33 and may be clamped by the clamping bolt 37. For contact printing the lens and diffusing screen in the panel 13 are removed the hinged cover 5 acting as a pressure board.
Patent GB-1369923-A (GB)
Title: Polyesters
IPC: C08G63/199
Filed: 1972-05-04
Abstract: 1369923 Polyester films EASTMAN KODAK CO 4 May 1972 [7 May 1971] 20873/72 Heading B5B [Also in Divisions B2 C2 C3 and G2]  A film of a polymer comprising units of a 1,1<SP>1</SP>- spirobi-(indan)-diol or diamine, adicarboxylic acid of four or more carbon atoms and an aliphatic diol, aromatic diol or bisphenol other than 1,1<SP>1</SP>-spirobi-(indan)diol may be made by solvent casting using chloroform or a mixture of 1,2-dichloroethane and ethanol, the cast film being partially dried and then cured.
Patent GB-1473033-A (GB)
Title: Solar steam generator
IPC: F24S90/00
Filed: 1975-05-16
Abstract: 1473033 Utilizing solar energy THERMO ELECTRON CORP 16 May 1975 [20 May 1974] 20904/75 Heading F4U Low pressure steam produced in a solar collector 10 is compressed by an engine-driven compressor 16 for subsequent use in industrial processes, e.g. iron and steel production, petroleum refining, or for heating buildings. In the preferred embodiment, the high pressure steam is augmented by steam produced by waste heat from the compressor I.C. engine 18. The exhaust gases heat a boiler 24 and low pressure steam from the cooling system is compressed by a compressor 28 driven by the engine 18. The solar collector 10 is a flat plate collector which produces steam in the temperature range 150- 250‹ F.
Patent GB-669126-A (GB)
Title: Improvements in or relating to an electromagnetic vibrator
IPC: H02K33/04
Filed: 1949-08-11
Abstract: 669,126. Reciprocating - machines. STEVENS, A. H. (Syntron Co.). Aug. 11, 1949 No. 20911/49. Class 35. A vibratory motor of the leaf-spring type has a base 1 secured to the object to be vibrated, a vibratory armature 9 accommodated within a vibratory member 10 fixed to base 1 by leafsprings 21 and helical springs 25, 26, and resilient means 36 secured to the base to receive vibrational impacts. Two studs 16 fixed at one end to the base serve to secure the leaf-springs 21 to the base and also to locate and hold the coil-springs 25, 26. The leaf-springs 21 have open-ended slots at their outer ends to receive bolts 15 which hold leaf-spring holders 31, including rubber cushion 32, clip 33 and spacers 30. In a modification, springs 25, 26 are omitted and instead the movable member has a pocket in which weights can be placed so as to determine its natural period of vibration.
Patent GB-422934-A (GB)
Title: Improvements in and relating to spouts for discharging liquid from barrels and barrel-like containers
IPC: B65D25/48
Filed: 1933-07-25
Abstract: 422,934. Tilting casks &c. PETERS, O. E., 50, Zwickauer - Strasse, Chemnitz, Germany. July 25, 1933, No. 20943. [Class 21] Iron and wooden barrels &c. which are discharged through a pouring spout by rotating the barrel &c. about its longitudinal axis, the barrel &c. being, if desired, supported on rollers, have the pouring spout 11, Fig. 7, fitted with a long handle 8 which increases leverage for turning the barrel &c. The handle may have a longitudinal bore to serve as a vent, and may be continued within the vessel by a pipe 8. The spout is held in place by a screw 14, a screw 17 and a shoulder 8<11>. The spout may in an alternative be held only by a screw thread. In the form of spout shown in Fig. 4, the handle 8 is adjustable and may be inserted through holes 7 to facilitate screwing in the spout.
Patent GB-423226-A (GB)
Title: Improvements in or relating to photographic cameras
IPC: G03B17/14
Filed: 1933-07-18
Abstract: 423,226. Photographic lens fittings and mounts. BILLING, N. P., 6, Lower Regent Street, London. July 18, 1933, No. 20966/34. Divided out of 423,035. [Classes 97 (i) and 98 (i)] A lens mount comprises front and rear lens components carried by superimposed plates or discs having in their faces circular recesses, eccentric to the optical axis of the lens, in which are mounted rotary discs which lie between the lens components, and carry colour filters, stops, or extension lenses. A shutter may also be similarly mounted between the lens components. As shown, the mount comprises front and rear elements 12, 10 carrying the lens components 13, 14, and an intermediate element 11 having an eccentric circular recess in which turns an apertured disc 15 carrying colour filters in all but one of its apertures and having a knurled manipulating edge protruding at 22 from the element. A disc 24 having diaphragm apertures 25 is similarly mounted in the front element 12, and this element has windows 32, 33 exhibiting the filter and stop indications on the discs 15, 24. A shutter, indicated at 27, 28, may be mounted on the rear element 10. Further discs such as 15, 24 may be incorporated, and in one of these a series of additional lenses for alternative use may be fitted. The colour filters may be of plain gelatin without protective cover-glasses. The elements 10, 11, 12 may be of mouldable or die-cast material, and the mount may be used in the camera described in Specification 423,035.
Patent GB-512650-A (GB)
Title: Improvements in and relating to rheostats or potentiometers
IPC: H01C10/32
Filed: 1938-01-07
Abstract: 512,650. Variable resistances. INTERNATIONAL RESISTANCE CO. Jan. 7, 1938, No. 20997/39. Convention date, Jan. 7, 1937. Divided out of 511,178. [Class 37] A variable resistance or potentiometer particularly for use as a volume control for radio apparatus comprises an insulating support 43, Fig. 2, with inner portions 46, 47 and a narrow annular coating 80, e.g., one-eighth, of an inch wide, of resistance ink, with which engages a sliding contact formed with a number of individual contact arms 61, Fig. 6, of phosphor bronze wire of circular cross section bent to a curve at the point 61a at which they engage the resistance strip so as to provide point contact between each contact finger and the resistance strip. These wires are clamped at one end by a strap 59b on a rotatable insulating arm 39 and are free to move vertically at their other ends. The ends of the resistance strip are of high and low potential and are connected to terminals 27, 28 respectively. The sliding contact is connected to a third terminal 29 by means of a coil 58 of spring wire having a substantial number of turns. Riveted to the centre terminal 28 is a member 38 which is bent down at one end 38a so as to make contact with the low potential end of the resistance strip. The member 38 has also a raised portion 38c which extends over the head of the rivet 36 that secures the terminal 27 to the high potential end of the resistance, so as to serve as an electrostatic shield between this and the sliding contact. Points on the resistance strip are connected by ribbons 50, 51 of highly conductive coating material to rivets 41, 40 situated in the portions 46, 47 of the support within the resistance ring 80. These rivets secure and make contact with terminals 26, 25. Specification 511,178 is referred to.
Patent GB-499784-A (GB)
Title: Manufacture of sulphuric acid derivatives of imidazolines and imidazolinium compounds
Filed: 1937-07-29
Abstract: Imidazolines or imidazolinium compounds substituted at one or both nitrogen atoms with substituents containing at least one aromatic ring, hydroxy group, olefinic double bond or branched aliphatic chain are treated with a sulphonating agent.  The following substituents are mentioned: phenyl, tolyl, xylyl, mesityl, cumenyl, benzyl, chlorphenyl, hydroxyphenyl, hydroxy benzyl, naphthyl, nitronaphthyl, -C6H4NHC6H5, -C6H4COCH3, -C6H4COC6H5 -C6H4C6H5, C6H5CH=CH.CH2-, allyl, octodecenyl, ethylol, propylol, dihydroxypropyl, isobutyl and isoamyl.  Sulphuric acid esters or true sulphonic acids are produced when the substituents contain double bonds or hydroxy groups, depending upon the conditions of sulphonation.  In modifications, (a) when a substituent contains an amino group, the imidazoline or imidazolinium compound may be treated with an aldehyde sulphonic acid and then hydrogenated; thus 2 - heptadecyl - 1-aminoethylimidazoline may be treated with benzaldehydesulphonic acid and the product hydrogenated; (b) in process (a) the hydrogenation step may precede the sulphonation; (c) when the hydrogen of the secondary nitrogen is unsubstituted, the imidazoline is treated with an aldehydebisulphite or with an aldehyde and then a bisulphite; thus undecylimidazoline may be treated first with formaldehyde and then with sodium bisulphite.
Patent GB-717887-A (GB)
Title: Colour television
IPC: H04N11/14
Filed: 1952-08-21
Abstract: 717,887. Colour television. RADIO CORPORATION OF AMERICA. Aug. 21, 1952 [Aug. 29, 1951], No. 21039/52. Class 40 (3) In a colour television receiver, the phase and amplitude modu'ated sub-carrier signal carrving colour information is demodulated at an intermediate frequency. Thus, as shown, the sub-carrier signal (3.99 Mc in the example chosen) is derived from the 40 Mc I.F. amplifier 7 at a frequency of 43.99 Mc and applied to detectors 33, 37, 41. The demodulating oscillator 31 operates at the same frequency and is applied to the detectors in appropriate phases to cause them to operate in step with the respective colour samplers at the transmitter. The oscillator is continuously running and is compared in phase with the synchronizing "bursts" from gate 27 in a phase discriminator 29 to derive a control voltage. This voltage then operates on a reactance tube 49 which in turn controls the frequency of the receiver local oscillators 5 to maintain the intermediate frequency sub-carrier at the frequency of oscillator 31. As an alternative, or in addition, the control of frequency may be applied to oscillator 31.
Patent GB-909003-A (GB)
Title: Dental equipment
Inventor: BOULSOVER GEOFFREY
IPC: A61C19/00
Filed: 1960-06-15
Abstract: 909,003. Dental stands. AMALGAMATED DENTAL CO. Ltd. June 2, 1961 [June 15, 1960], No. 21074/60. Class 81 (2). The tray of a dental stand is mounted on a pivoted telescopic arm. In the form described, a base 26 carries two vertical guides 19, in which run the corresponding guide members attached to a tubular column 17. The latter is connected by cords 23 to a balance weight 22 and thus may be easily raised and lowered. A spigot 16 is rotatably mounted in the top of this column and supports a hollow, channel member 10, this having a telescopic extension 11 mounted within it on ball guides 12. The free end of this extension is shaped, at 15, to receive a tray bracket, which is preferably rotatable. If desired, an instrument housing may be mounted below the tray and may be independently rotatable. Specifications 909,001 and 909,002 are referred to.
Patent GB-460238-A (GB)
Title: Improvements in or relating to systems for transmitting electrical signals
IPC: H04B1/68
Filed: 1935-07-24
Abstract: 460,238. Band - width reduction. SIEMENS & HALSKE AKT.-GES. July 24, 1935, No. 21076. Convention date, July 24, 1934. [Class 40 (iv)] [Also in Group XL] An arrangement for halving all the frequencies in a signal band having limit frequencies n, n<1> comprises a modulator M, the output terminals B of which are coupled to one of the inputs C through a filter S passing the band n/2 to n<1>/2 and an amplifier V. The half frequencies are taken off at B. Figs. 2 and 3 show suitable modulators formed from groups of dry rectifiers. These arrangements act in one direction as halvers and in the other as doublers so that a single piece of apparatus serves for compression and expansion. The band to be compressed may first be raised in frequency to make it more nearly the equivalent of a single frequency. Alternatively, bandwidth reduction may be performed separately on a number of sub-bands into which the main band is first divided. In multiplex carrier telegraphy the various signals may be brought closer together to form a band which is then compressed by a single apparatus of the kind described. Saturable rectifiers or other amplitude limiters may be included in the feed back circuit.
Patent GB-256405-A (GB)
Title: Improvements in pulling devices
IPC: B66D3/02
Filed: 1925-08-24
Abstract: 256,405. Marks, E. C. R., (Puller Manufacturing Co., Inc.). Aug. 24, 1925. Winches ; brakes ; driving-gear; self-sustaining gear.-The drum of a winch is free on its shaft and two oppositely-acting transmission means of different speed and power ratios are placed between it and the shaft so that the drum may be rotated continuously in one direction through both of the transmission means by rocking the shaft in opposite directions, or may be rotated continuously through either transmission means by rotating the shaft continuously in one direction or the other. An arm 4, Fig. 1 fast on the shaft 2 carries a pawl 5 that can be engaged with or disengaged from ratchet teeth 6 on a flange of the drum 3. A pawl 10 mounted on a similar arm 9 engages a ratchet 11 on a gear 12 loose on the shaft 2. A pinion 13 mounted on the framework engages with the teeth 15, Fig. 3, on one of the drum flanges, and also engages the gear 12. The squared ends of the shaft 2 may be engaged by a lever, or crank, or a driving pulley may be mounted thereon. When both pawls are in engagement with the ratchets and the shaft 2 is rocked in opposite directions, the drum will be rotated in one and the same direction. If one of the pawls is disengaged, the drum is rotated intermittently in the same direction as before when the shaft is rocked. The drum may be rotated continuously by rotating the shaft 2, and in this case the pawl not used for driving acts as a self-sustaining gear. The drums housing the ratchet gears are formed externally with ratchets 20, 21 which are engaged by pairs of pawls 22, 23 and 24, 25 forming low speed driving devices. These devices are of similar construction except for their power and speed ratio. The pawls 22, 23 are carried by a rocking member 26 having a squared end 28 to which a handle mav be fitted and having a stop member 29 which limits its movement by coming into contact with abutment surfaces 30, 31. Each pawl has pins 45 which receive between them springs 46, 47 carried by a pivoted pawl disengaging member 48 controlled by a lever 50. A pivoted stop 32 when turned to engage the member 29 keeps the pawls in neutral position. The outer circumference of the ratchet wheel 6 forms a brake surface 53 and is engaged by a brake band 54, the ends of which are attached to a rocking member 55 provided with a handle 56. A ratchet 57 on a handle 56 is engaged by a pawl 58 which can be disengaged by a brake release lever 60. The winch is mounted on road wheels 62.
Patent GB-883560-A (GB)
Title: Improvements in and relating to hydraulic jack installations for motor vehicles
IPC: F15B21/041
Filed: 1959-06-19
Abstract: 883,560. Hydraulic jacks. ZAHNRADFABRIK FRIEDRICHSHAFEN A.G. June 19, 1959 [June 19, 1958], No. 21207/59. Class 78 (3). [Also in Group XXXI] In an hydraulic lifting mechanism in which a pump 4 is operated from a vehicle, e.g. tractor, gear-box 2 (through the shaft 12), fluid is supplied to the lifting ram 10 through a conduit 6 and valve 7 and returned through the valve 7 and a conduit 8, the pump supply line 5 and return line 8 both leading to the same filter 3.
Patent GB-1205634-A (GB)
Title: Recovery of zinc
Inventor: MORGAN HUGH MYLLON
IPC: C22B19/04
Filed: 1967-05-08
Abstract: 1,205,634. Recovering zinc from dross. FOSECO INTERNATIONAL Ltd. April 22, 1968, [May 8, 1967], No. 21228/67. Headings C7D and C7M. Zinc is recovered from the ash formed by surface oxidation of a bath of molten zinc (e. g. being used for hot dipping) by treating it, either on the surface of the bath or separately, with composition, preferably anhydrous, comprising magnesium chloride and a refractory filler. The chloride preferably comprises 50-95% of the composition, and the filler 5-50% thereof. Other metal chlorides (such as of zinc) may be added, any zinc chloride preferably containing less than 1% zinc oxide impurity and the refractory filler (e.g. grog) preferably contains at least 25% thereof Al2O3. A composition comprising ZnCl2, MgCl2 and a refractory filler, which last contains at least 25% Al2O3, is preferred.
Patent GB-673100-A (GB)
Title: Improvements in or relating to sheds and the like
IPC: E04B1/34
Filed: 1949-08-16
Abstract: 673,100. Aircraft hangars. KOLBUSZOWSKI, J. S. T., and KOLBUSZOWSKI, M. J. Aug. 15, 1950 [Aug. 16, 1949], No. 21329/49. Class 20(i). In a shed, e.g. an aircraft hangar, providing two principal covered spaces 6, the main roof-supporting members consist of two halves each comprising a vertical leg 2 and a substantially horizontal cantilever beam 3 rigidly connected to the top of the leg 2 and extending away from the leg 2 of the other half, the two halves being braced together by tension and compression members 4, 5 respectively. Thus each half of a roof-supporting member forms an L-shaped structure. Two such members may be arranged in spaced parallel relationship, running the length of the shed, roof trusses extending between them, and walls and doors being provided at the sides and ends. In a modification, Fig. 10, the tension and compression members are formed by extensions of the cantilever beam 34, the halves of each roof-supporting member in this case being of T-shape. Similarly in a third embodiment, Fig. 17, the legs 52 are joined to the beams. 51 intermediate their lengths, the inner ends of beams 51 of each half having interposed between them a tie 53 and a compression member 55 extending between vertical legs 54. In this last embodiment four roof-supporting members may be spaced in parallel relationship, the two outer being shorter than the two inner. Purlins, ridges, and diagonal bracing are provided in all embodiments.
Patent GB-1089931-A (GB)
Title: Can openers
Inventor: RUDMAN JACK
IPC: B67B7/46
Filed: 1963-05-29
Abstract: 1,089,931. Can openers. RUDMAN, DARLINGTON & CO. Ltd. April 22, 1964 [May 29, 1963], No. 21425/63. Heading B8D. In a can opener of the type having a feeding wheel 14 movable into overlapping relation with an inclined cutting wheel 16 and abutment means 21 maintaining the underside of the can rim in engagement with the periphery of the feeding wheel, spring means 23, 27 are provided for forcing the rim towards the overlapping face of the cutting wheel so that it operates close to the can rim. The feeding wheel 14 is lowered away from the cutting wheel by turning a crank-handle 13 through 180 degrees from the position shown and the can is inserted between the cutting wheel and a shoulder 22 on a plunger 23 slidable on a pin 26 and pressed towards the cutting wheel by a spring 27. The crank handle 13 is then raised and the feeding wheel turned by a handle 18 to cut around the lid. The can is forced downwardly on to the feeding wheel by the abutment 21 projecting laterally from a U-shaped spring-pressure lever 24. A lock-nut 20 on the shaft of the cutting-wheel enables it to be adjusted relatively to the feeding wheel.
Patent GB-794397-A (GB)
Title: Improvements in and relating to absorbent dressings
IPC: A61L15/16
Filed: 1956-07-11
Abstract: In order to give added strength to a gauze wrapper for a sanitary napkin or other absorbent dressings, it is made wholly or partly of leno weave, by which pairs of warp threads are twisted together to grip the weft threads between them.  The fabric may be further stabilized by the application of adhesive to the thread intersection and, for softness in use, the adhesive may be used to retain a facing of short fibres.
Patent GB-391657-A (GB)
Title: Improvements in or relating to means for indicating failure of the electric supply to clocks driven thereform
IPC: G04C15/00
Filed: 1932-07-29
Abstract: 391,657. Electric clocks. SHEPHERD, G. R., 2, Norfolk Street, Strand, London.- (Westinghouse Electric & Manufacturing Co. ; East Pittsburg, U.S.A.) July 29, 1932, No. 21494. [Class 139. ] In a clock driven by a self-starting electric motor, one of the time-indicating members (hands) is adapted to be permanently arrested when the supply fails. The hour and minute hands 8, 9 are mounted on shafts 13, 14 respectively, connected through gearing 16 to the shaft 35 of a synchronous motor 4. The seconds hand 10 is mounted on a shaft 15 and is normally driven through worm gearing 17, 18 and clutch 19, 20 from the pinion 23. The clutch member 20 is movable axially by one arm of a bellcrank lever pivoted at 28, the other arm of which carries a pivotal armature 26 normally attracted by the stray flux from the magnet poles 5 to maintain the clutch members in engagement. When the supply fails a spring 29 rocks the bell crank to disengage the clutch members, and should the supply become available again, the stationary seconds hand indicates that a stoppage has occurred. The drive to the seconds hand 10 may be restored by depressing a button 36, a lever 31 pivoted at 33 thereby rotating the bell crank until the armature 26 is held by the poles 5. In a modification, the shaft 15 carrying the worm wheel 17, Fig. 2, is rotatably mounted in a lever 37 pivoted at 38, the worm 18 normally meshing with the wheel 17 to drive the seconds hand 10. When the current fails, the armature 26, pivoted at 27 to the arm 37, is released, and the latter falls under gravity to a stop 30 to disengage the gears 17, 18.