baber/WOPTO huggingface dataset:
Patent GB-621977-A (GB)
Title: Improvements in the production of poly-ester-amides
IPC: C08G69/44
Filed: 1946-12-16
Abstract: Polyesteramides are prepared by condensing more than two bifunctional reagents including a high melting constituent, the functional groups of the reagents being amino groups, hydroxy groups, carboxylic groups or ester- or amide-forming equivalents of hydroxy and carboxylic acids, and the high melting constituent not being added until the other constituents have been so far condensed that the reaction mixture remains homogeneous after its inclusion.  A high melting constituent is a diamine whose N,N1-diacetyl derivative melts above 23 DEG  C. or a dicarboxylic acid whose dimethyl ester melts above 110 DEG  C. Diamines mentioned are benzidine; p-phenylene diamine; 2-methylbenzidine; o-tolidine; 5,51-dichloro-o-tolidine; 3,31-diethylbenzidine; m - tolidine; 3,5,31\h,51 - tetramethyl - benzidine; 3,31-diamino -4,41-dimethyldiphenyl methane; and the corresponding 6,61-dimethyl compound; 4,41-diamino-stilbene; 4,41-diamino-diphenyl sulphone; 4,41 - diamino - dibenzyl - sulphone; 4,41-diamino-3,31-dimethyl-dibenzyl-sulphone; 1,2,3,4 - tetrahydro - 1,5 - naphthalene diamine; 1,2,3,4 - tetrahydro - 5,8 - naphthalene diamine; 1,3-, 1,4- and 1,6-naphthalene diamines; 5-, 6- and 7-methyl derivatives of 1,3-naphthalene diamine.  Dicarboxylic acids mentioned are terephthalic acid; 2,5-dichloroterephthalic acid; 2,6-dimethyl-terephthalic acid; 4,41 - diphenic acid; 4,41 - dicarboxy - dipheny sulphone; 4,41 - dicarboxy - 3,31 - di - methyldiphenyl; 4,41 - dicarboxydibenzyl; a b -bis - 4 - carboxyphenoxyethane; thiophene - 2,5 - dicarboxylic acid; pyrane - 2,6 - dicarboxylic acid; pyridine-2,5- and 2,6-dicarboxylic acids. The other ingredients of the reaction mixture may be glycols, dicarboxylic acids, diamines, hydroxycarboxylic acids, amino-carboxylic acids and amino-alcohols.  Substances mentioned are ethylene glycol, trimethylene glycol, tetramethylene glycol and hexamethylene glycol.  In the example, ethylene glycol is partially condensed with adipic acid, benzidine is added and the condensation completed.  Specifications 620,494 and 621,971 are referred to in the Provisional Specification.
Patent GB-1014429-A (GB)
Title: Pyridine complexes and their use as olefin polymerization catalysts
IPC: C07F7/00
Filed: 1963-09-20
Abstract: The invention is for a stereospecific polymerization catalyst for olefins and its use for polymerization in the absence of water and oxygen, comprising one or more Group I, II or III organometallic compounds, especially aluminium trialkyl or alkyl halide, and a coordination complex (see Division C2) formed by the addition of pyridine to a substantially equimolar amount of titanium trichloride. The polymerization of ethylene or propylene are the preferred embodiments in preferably a hydrocarbon solvent.  The examples describe the polymerization of ethylene and propylene using a catalyst comprising TiCl3/pyridine with diethyl aluminium monochloride or aluminium triethyl. The description refers to activators, e.g. pyridine, amines, phosphines, arsines, bismuthines and/or ethers which may be added to the catalyst, specifies as molecular weight regulators hydrogen, diethyl zinc or mixtures thereof and states the use of water, mineral acids, alkalis, alcohols, amines, organic sulphites, dialdehydes, diketones, oximes, lactones, amides and alkylene carbonates as agents for "clarification" of the polymer slurry.ALSO:Co-ordination complexes are made by adding, preferably in a solvent or a dispersing medium for the products, pyridine to a substantially equimolar amount of titanium trichloride. In the example toluene is employed as dispersing medium and the reaction carried out under dry nitrogen yields a gelly, oxygen and/or moisture-sensitive precipitate, which may be employed as a component of an olefin polymerization catalyst (see Division C3).
Patent GB-344497-A (GB)
Title: Improvements in electric discharge tubes
IPC: H01J61/067
Filed: 1929-12-04
Abstract: 344,497. Discharge lamps. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London.-(Assignees of Patent- Treuhand Ges. f³r Elektrische Gl³hlampen ; 11, Ehrenbergstrasse, Berlin.) Dec. 4, 1929, No. 37227. Convention date, June 29. [Class 39 (i).] Electrodes for glowdischarge lamps and rectifiers comprise a rigid core or rod of electron-emitting substance having httle or no electrical conductivity when cold and a metal member partially enclosing the core or passing therethrough to protrude into the discharge space. The metal is connected to the lead-in wire and an exposed part of the metal is the seat of a preliminary discharge when a starting voltage is applied. This discharge heats the metal and the adjacent part of the core, which then emits electrons and takes part in the discharge. The metal may comprise a sleeve 4 or coating extending up to the front end of the core 5, or a wire helix 9, Fig. 4, or wire gauze about a transverse core 5. In modifications, the metal comprises one or more wires 10, Fig. 5, passing through the core 5. The ends of the wires 10 may be bent over against the core and the lead 3 may be protected from discharges by a magnesium oxide or quartz sleeve 11. The core 5 may be moulded about the wire 10 or perforated to receive the wire. In all forms, the core 5 is made by pressing and sintering oxides or silicates of alkali, alkaline earth or rare earth metals, for example, of potassium, sodium, caesium, rubidium, calcium, barium, strontium, thorium, cerium, lanthanum and didymium. The tube 1, Fig. 1, may be transparent to ultra-violet rays and filled with common gas such as nitrogen or rare gas or mixtures. Specification 315,391, [Class 39 (i), Electric lamps, Arc &c.], is referred to.
Patent GB-1479926-A (GB)
Title: Apparatus for checking the ends of rod-like tobacco articles in particular cigarettes
IPC: G01N27/22
Filed: 1974-08-27
Abstract: 1479926 Monitoring density electrically HAUNI-WERKE KORBER & CO KG 27 Aug 1974 [30 Aug 1973 20 Dec 1973] 37350/74 Heading G1N [Also in Division A2C] The tobacco density in the ends of cigarettes is measured by conveying the cigarettes at right angles to their axes past at least two capacitor electrodes which are stationary with respect to the cigarettes and are connected to a source of high frequency voltage. The electrodes may be disposed on opposite sides of the cigarettes or may all be opposite an end-face thereof. In one embodiment, Fig. 2, cigarettes Z are carried in a drum conveyer between capacitor plates 57, 58. A detector arrangement 71, 72 indicates when a cigarette is between the plates by triggering a gate circuit 74. The gate circuit causes an evaluation arrangement 61 to transmit a signal representing the tobacco density to a threshold value member 76. If this signal is below a value representing the minimum acceptable quantity of tobacco then member 76 emits a fault signal. In a second embodiment, Fig. 5, measurement is made on three-layer blocks of 20 cigarettes. Three pairs of electrodes 357a, 358a, 357b, 358b, 357c, 358c are provided, one pair corresponding to each layer. Three timing discs 394a, b, c cooperate with detectors 372a, b, c to cause transmission of an evaluation signal from a circuit 361a to a threshold member 376a. If the latter emits a signal a pneumatically operated slide ejects the entire block. In a third embodiment an arrangement similar to that of Fig. 2 is provided with means for correctly positioning a cigarette relative to the electrodes. Also in this embodiment some of the circuit components are located in a temperature controlled chamber to suppress drift phenomena swing the temperature fluctuation.
Patent GB-373934-A (GB)
Abstract: 373,934. Ash-collecting devices in stoves. TAYLOR, R., Muirhall Foundry, Larbert, Scotland. Nov. 17, 1931, No. 31825. [Class 126.] In open and solid-'fuel stoves of the kind described, for example, in Specification 245,395, [Class 126, Stoves &c.], and having a hopper 10 for diverting cinders falling through the front grate to the ash-box 8, together with a door or doors 13 to close the space above the hopper and in front of the grate, so that the cinders may fall into the hopper whether the stove is open or closed, a movable flap or valve 26 closes the lower end of the hopper and prevents the passage of air from the ashpit to the front of the grate. In the stove shown, the hopper 10 is formed by a bar 9 preferably integral with side cheeks 11 which are formed on or attached to the front of the stove, and form a support for the horizontally hinged door 13. The flap 26 is hinged by means of trunnions 27 housed in recesses formed in the cheeks 11 or front plate of the stove, and normally hangs vertically to close the lower end of the hopper 10. It may open automatically under the weight of cinders in the hopper, or be opened by a poker inserted in the hopper.
Patent GB-989035-A (GB)
Title: A method of providing an accurately machined bore in a metal body
IPC: F16B37/12
Filed: 1962-10-02
Abstract: 989,035. Jointing. SHEEPBRIDGE EQUIPMENT Ltd., and J. T. DAVENPORT. Oct. 1, 1963 [Oct. 2, 1962; April 4, 1963], Nos. 37402/62 and 13372/63. Heading B3V. A composite metal article comprises a body 10, a core 13 in a bore 11 in the body 10 and of softer metal than that of the body 10, and a plastics bonding material 16 in the space between the body and core, bonding the two together. The body 10 may be a cast nickel steel wear plate, or impeller, of a pump. One or more circumferential grooves 15 may be formed in the mild steel core or body 10, or in both, and axial ribs 14 may be formed on the core engaging loosely recesses 12 in the body 10. The parts are assembled in a jig for bonding, and a screwthreaded or keyed bore 17 being formed in the core after the bonding operation. In a modification, Fig. 4, the bore in the body 10 has internal screwthreads 18 and the outer surface of the core external threads, between which and the threads 18 the epoxy bonding material is introduced. A screwthreaded bore is then formed in the core. In a further form, Fig. 5, co-operating grooves 25, 27 in the opposed surfaces of the tapered core and bore are filled by the bonding material. The second Provisional Specification states also that the core may comprise an outer internally threaded sleeve and an inner externally threaded sleeve extending beyond the outer sleeve and having an outwardly directed flange.
Patent GB-1467224-A (GB)
Title: Process for the preparation of 6,7-dialkoxy-quinoline deri vatives
IPC: A61K31/47
Filed: 1974-08-27
Abstract: 1467224 Process for preparation of 6,7-dialkoxyquinoline derivatives CHINOIN GYOGYSZER ES VEGYESZETI TERMEKEK GYARA RT 27 Aug 1974 [28 Aug 1973] 37445/74 Heading C2C  A novel process for preparation of compounds of the Formula I and salts thereof where such exist wherein R<SP>1</SP> is C 1-4  alkyl, R<SP>2</SP> is C 3-12  alkyl or alkenyl, and R<SP>3</SP> is C 1-4  alkyl or an aralkyl comprises alkylating a compound of the Formula II The compounds are known coccidiostats. The compounds II are claimed in Specification 1,467,225.
Patent GB-1172461-A (GB)
Title: Indole Derivatives
Inventor: CHEMERDA JOHN MARTIN
IPC: C07D209/28
Filed: 1967-08-16
Abstract: 1,172,461. Indole derivatives. MERCK & CO. Inc. 16 Aug., 1967 [23 Aug., 1966], No. 37636/67. Heading C2C. 1 - p - Chlorobenzoyl - 2 - methyl - 5 - methoxy-3-indolyl-acetic acid is prepared by oxidation of an indole derivative of the general formula wherein Z is (a) -CH 2 -CX = CR<SP>1</SP>R<SP>11</SP>, (b) -CH 2 COC(OH)R<SP>1</SP>R<SP>1</SP>, (c) -CH 2 -CH(OH)- C(OH)R<SP>1</SP>R<SP>1</SP>, (d) -CH 2 -CH#CR<SP>111</SP>, (e) -CH 2 CH(OH)CH 3 , (f) -CH 2 CH(OH)-CH = CH 2  or (g) -CH 2 COCOOH, in which X is hydrogen or a halogen, each R<SP>1</SP> is hydrogen or C 1-5  alkyl, R<SP>11</SP> is R<SP>1</SP> or a halogen and R<SP>111</SP> is C 1-5  alkyl or p-chlorobenzoyl. Novel indole derivatives of the above general formula are prepared (i) when Z is -CH 2 -CX = CR<SP>1</SP>R<SP>11</SP>, by reaction of pmethoxyphenylhydrazine hydrochloride with a ketone of the general formula CH 3 COCH 2 CH 2 CX = CR<SP>1</SP>R<SP>11</SP>, followed by treatment of the resulting N- unsubstituted indole derivative of the general formula with p-chlorobenzoyl chloride; (ii) Z is -CH 2 COC(OH)R<SP>1</SP>R<SP>1</SP> or -CH 2 CH(OH)-C(OH)R<SP>1</SP>R<SP>1</SP>, by partial oxidation with potassium permanganate of an indole derivative of the first general formula above wherein Z is -CH 2 -CH = CR<SP>1</SP>R<SP>1</SP>, followed optionally by chromic acid oxidation of the resulting glycol, (iii) when Z is -CH 2 C # CR<SP>111</SP>, by reaction of p-methoxyphenylhydrazine hydrochloride with a ketone of the general formula CH 3 COCH 2 CH 2 C # CR<SP>1</SP>, followed by treatment of the resulting N- unsubstituted indole derivative of the general formula with p-chlorobenzoyl chloride; (iv) when Z is -CH 2 CH(OH)CH 3 , by reaction of p-methoxyphenylhydrazine hydrochloride with a ketone of the formula CH 3 COCH 2 CH 2 CH(OH)CH 3 , followed by treatment of the resulting 2-methyl- 3-(2<SP>1</SP>-propanol)-5-methoxyindole with p-chlorobenzoyl chloride; (v) when Z is -CH 2 CH(OH)CH = CH 2 , by reaction of p-methoxyphenyl-hydrazine hydrochloride with a ketone of the formula CH 3 COCH 2 CH 2 CH(OH)CH = CH 2 , reaction of the resulting 2-methyl-3-(2<SP>1</SP>-hydroxy- 3<SP>1</SP>-butene) -5-methoxyindole with dihydropyran and p-toluenesulphonic acid, and treatment of the produced hydroxy-protected derivative with firstly p-chlorobenzoyl chloride and secondly acetic acid; or (vi) when Z is -CH 2 COCOOH, by potassium permanganate oxidation of an indole derivative of the first general formula above wherein Z is -CH 2 CH(OH)CH = CH 2 .
Patent GB-754820-A (GB)
Title: Tetrachlorocyclopentadiene
IPC: C07C17/23
Filed: 1954-12-30
Abstract: A tetrachlorocyclopentadiene (see Group IV (b)) is used as a vulcanizing agent for GR-S in conjunction with other vulcanizing agents; and as a low-hysteresis processing aid for butyl rubber and carbon mixes, with other ingredients; the results of tests on the products are given.ALSO:The invention comprises a tetrachlorocyclopentadiene (m.pt 61-62 DEG  C.), and the process for obtaining it by the hydrogenation of hexachlorocyclopentadiene to replace two of the chlorine atoms with hydrogen, for example with a hydrogenation catalyst or with nascent hydrogen.  The product gives Diels-Alder adducts with the usual olefinic compounds, e.g. cyclopentadiene, p-benzoquinone, and maleic anhydride, and is useful for vulcanizing ethylenically unsaturated rubbers, and for processing Butyl rubber.  Examples are given of the hydrogenation reaction by both methods referred to above and of the conversion of the tetrachlorocyclopentadiene product to adducts with p - benzoquinone, 1 : 1, cyclopentadiene, 1 : 1, and maleic anhydride, 1 : 1, the product being a dibasic acid and of the use of the tetrachlorocyclopentadiene as a vulcanizing agent for GR-S and a processing aid for Butyl rubber.
Patent GB-344791-A (GB)
Title: Improvements in or relating to cabinets for gramophones, gramophone records, music and the like
IPC: G11B33/06
Filed: 1929-12-10
Abstract: 344,791. Cabinets. FORD, G. W., (trading as FORD & SON, W.), Racine Works, Garden Street, Sheffield. Dec. 10, 1929, No. 37812. [Class 52 (i).] In a cabinet for gramophones, records, music and the like, the sliding door a is fitted between yielding tracks c. As shown, the track c is adapted to be loosely housed in grooves 6 in guides 5, and to be pressed outwards, towards edges of the the door a, by springs d in housings e.
Patent GB-939247-A (GB)
Title: New metallised mono-azo dyestuffs containing halohydrin groups
Inventor: BLACKHALL ALEXANDER
IPC: C09B62/58
Filed: 1960-11-03
Abstract: 1-[31- N:N-bis(g - chloro-b -hydroxypropyl) aminophenyl]-3-methyl-5-pyrazolone is obtained by treating 1-(31-aminophenyl)-3-methyl-5-pyrazolone with epichlorhydrin. Specification 853,172 is referred to.ALSO:The invention comprises metallized azo dyes which, in the free acid form, are of formula <FORM:0939247/IV(a)/1> wherein A is a substituted or unsubstituted arylene radical, B is the residue of a substituted or unsubstituted coupling component coupling in ortho position to a hydroxyl group Z is -O- or -COO-, M is a chromium or cobalt atom, X is a chlorine or bromine atom, R is a hydrogen atom or a -CH2CHOHCH2X group and m is 2 or 4 provided that each of the -NR-CH2CHOHCH2X group is attached directly to a carbon atom present in B and that A and B are free from sulphonic and carboxylic acid groups other than metal-coordinated carboxylic acid groups.  The dyes are prepared by metallizing with a chromium- or cobalt-yielding agent a suitable monoazo dye to give a 1:2-complex or by reacting with epichloro- or epibromo-hydrin a metallized monoazo dye of formula <FORM:0939247/IV(a)/2> The dyes are used to dye nitrogenous fibres such as wool, silk, polyamide and polyurethane fibres in yellow, orange, brown and grey shades. In examples: (1) the monoazo dye 4-nitro-2-aminophenol--> 1-[31-N:N-bis(g -chloro-b -hydroxypropyl) aminophenyl]-3-methyl-5-pyrazolone is chromed; (2) the 1:2-chromium complex of 1-(41-aminophenyl) -3-methyl-4-(21-hydroxy51-sulphamyl-phenylazo) -5-pyrazolone is reacted with epichlorohydrin.  Further examples are specified. Specification 853,172 is referred to.
Patent GB-947471-A (GB)
Title: Material for printing plates
IPC: C09D143/02
Filed: 1962-10-05
Abstract: <FORM:0947471/C2/1> <FORM:0947471/C2/2> <FORM:0947471/C2/3> <FORM:0947471/C2/4> <FORM:0947471/C2/5> <FORM:0947471/C2/6> <FORM:0947471/C2/7> <FORM:0947471/C2/8> <FORM:0947471/C2/9> <FORM:0947471/C2/100> <FORM:0947471/C2/111> <FORM:0947471/C2/122> Photopolymerisable compounds (see Divisions C3 and G2) are vinylphosphonic acids or poly-(vinylphosphonic acids) having one OH group on each P esterified with an alcohol: HO-CH2-CH2-O-C6H4-CO-CH = CH-Y HO-CH2-CH2-O-C6H4-CO-CH = CH-CH = CH-Y or HO-CH2-CH2-O-C6H4-CH = CH-CO-Y where Y is a substituted or unsubstituted mono-or multi-nuclear aromatic or heterocyclic group. Examples of groups Y have benzene, naphthalene, furane, thiophene and pyridine nuclei and alkyl, alkoxy, alkylamino, carbalkoxy, hydroxy, nitro, chloro and bromo substituents. The esters are prepared by reacting vinyl or polyvinyl phosphonic acid dichloride with a hydroxyalkyl ether of the appropriate chalcone in an inert anhydrous solvent in the presence of an acid binding agent, such as a tertiary organic base, and treating the product with water to saponify the second chlorine atom.  The 4-(beta hydroxy-ethoxy) chalcones are prepared by reacting molar quantities of beta-hydroxyethoxy-acetophenone with the appropriate aromatic or heterocyclic aldehyde in the presence of an alkaline condensation agent or, in some cases, hydrogen chloride.  The omega -4-(hydroxy - ethoxy) - chalcones are prepared from 4-(beta - hydroxy - ethoxy) benzaldehyde and a nuclear-substituted acetophenone. Detailed preparations are given for compounds having formulae 1 to 12 shown in the drawings and for the hydroxyethoxy chalcones used to prepare them.ALSO:Light-sensitive materials for printing plates (see Division G2) contain compounds which photopolymerize without sensitisers or catalysts and which are esters of vinyl or polyvinyl phosphonic acid having one OH on each P esterified with an alcohol: HO-CH2-CH2-O-C6H4-CO-CH=CH-Y; HO-CH2-CH2-O-C6H4-CO-CH= CH-CH=CH-Y or HO-CH2-CH2-O-C6H4-CH=CH-CO-Y; where Y is a substituted or unsubstituted mono- or multi-nuclear aromatic or heterocyclic groups. Examples of groups Y have benzene, naphthalene, furane, thiophene and pyridine nuclei and alkyl, alkoxy, alkylamino, hydroxy, nitro, chloro, and bromo substituents.  The preparation of such esters is described (see Division C2) including the step of polymerizing vinyl phosphonic acid dichloride in solution in benzene, dioxane or ethyl acetate using benzoyl peroxide or azodiisobutyronitrile as catalyst. Compounds used in specific examples are those having formulae 1 to 12 shown in the drawings. <FORM:0947471/C3/1> <FORM:0947471/C3/2> <FORM:0947471/C3/3> <FORM:0947471/C3/4> <FORM:0947471/C3/5> <FORM:0947471/C3/6> <FORM:0947471/C3/7> <FORM:0947471/C3/8> <FORM:0947471/C3/9> <FORM:0947471/C3/100> <FORM:0947471/C3/111 <FORM:0947471/C3/122>
Patent GB-1100188-A (GB)
Title: Olefin copolymers
IPC: C08F232/08
Filed: 1965-09-06
Abstract: Linear amorphous copolymers of cyclohexenonorbornene, ethylene, and an aliphatic alpha-olefin of the formula R-CH = CH2 where R is a C1- 6 alkyl group, are made by copolymerizing a mixture of the monomers in the presence of a halogen containing catalyst obtained from a vanadium compound and a beryllium or aluminium organometallic compound. Specified norbornenes are 5,6-cyclohexeno - 31 - norbornene - 2, 31,41 - dimethyl - 5,6 - cyclohexene : 31 - norbornene - 2, and 31 - methyl - 5,6 - cyclohexeno - 31 - norbornene - 2. The preferred alpha-olefins are propylene and/or butene-1.  The aluminium compound may be complexed with a weak Lewis base.  The Specification contains an extensive list of suitable catalyst components.  The catalyst may be formed and the polymerization carried out at low temperature. The copolymers may be vulcanized using conventional sulphur-containing techniques.
Patent GB-1368912-A (GB)
Title: Bak-filling a support system
IPC: E21F15/08
Filed: 1972-08-15
Abstract: 1368912 Apparatus for discharging settable material; tunnels &c BERGWERKSVERB- AND GmbH 15 Aug 1972 [31 Dec 1971] 38088/72 Headings ElF and E1S Interconnected pipe-work for discharging a settable material, e.g. calcium sulphate from a pressure, e.g. pneumatic, discharge duct 4 comprises a first ball-joint 51, first length of pipe 5, second ball joint 61, second telescopicallyadjustable length of pipe 6, swivel joint 71 first elbow member 7, telescopically adjustable length of pipe 8, second elbow member 9 and discharge nozzle 91. Hoists 30 on a monorail 3 support the pipe-work, which can be pivoted at 82 when the telescopic pipe 81 is retracted. Support arches 13 carry a sealing cover 14 of steel sheet. A swivel joint 92 and a tilting joint 93 are provided in the preferred embodiment.
Patent GB-1126631-A (GB)
Title: A stereoscopic photographing process
Inventor: SHIBATA TAKAO
IPC: G03B35/24
Filed: 1965-09-07
Abstract: 1,126,631. Stereoscopic photography. TOPPAN PRINTING CO. Ltd. Sept. 7, 1965. No. 38212/65. Heading G2A. In taking stereoscopic photographs, a camera in which a line or lenticular screen is mounted in front of the light-sensitive film is moved along a straight line path past the object to be photographed, without any rotation of the camera as a whole, the objective lens and/or the film plane of the camera being adjustable relative to each other. In the arrangement of Fig. 9, as the camera 10 moves along the line Y-Y' parallel to the length PQ of the object, the film plane 9 remains parallel to the direction of movement, while the front of the camera carrying the lens 8 moves so that the optical axis X-X' joining the centre of the object and the centre of the film plane passes through the centre of the lens. Fig. 18 is a practical realisation of this embodiment, showing a mechanical arrangement for rotating the lens-carrying front part only of the camera. In Figs. 10 and 19, (not shown) the same effect is achieved by a lateral movement of the lens-carrying front with respect to the film plane. In the modification of Fig. 13, the optical axis X-X' is deflected twice by means of two oblique mirrors D 1 , D 2  to reach the lens 8 and film plane 9. Mirror D 2  is fixed, while mirror D 1  is given the rotatory compensating movement as the camera traverses Figs. 15 and 21 (not shown), Figs. 15 and 21 (not shown), the optical axis is deflected by a single rotatable mirror, the camera being disposed so that the lens and film plane are aligned along the Y-Y' direction. In the arrangement of Figs. 17 and 24 (not shown), a rotatable prism is disposed in front of the lens to provide the necessary compensation.