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1. 发明专利

GB587180A Apparatus for preparing photoengraving plates 未知
公开(公告)号：GB587180A
公开(公告)日：1947-04-16
申请号：GB1476144
申请日：1944-08-02
申请人： FRANK THOMAS POWERS
IPC分类号： G03F7/16
摘要： A plate whirler for photo-engraving use comprises a rotatable support, means for rotating the support and plate in a predetermined automatic speed increase cycle from a predetermined variable minimum speed up to a predetermined maximum speed, and means for changing the speed under control of the rotating means. An electric motor 93, Fig. 1, drives the shaft 25 carrying the rack 28 which securely holds the plate P. A heating element 87 is secured to the cover 75. By a combination of pawls and ratchets actuated by eccentric 111, Fig. 2, the friction driving wheel 100 is automatically advanced radially of disc 101 to vary the driving ratio. The initial speed is determined by selectively inserting peg 132 in one of several holes 131 in the end of rack 120. A manual control bar 134 is provided enabling complete manual control or automatic control, or both to be effected. A foot lever having a pedal 146 may be used to disengage the driving means 100 from operative contact with the shaft. This lever also releases the plate holding means 50 and returns the rack 120 and pawl mechanism to the starting position. An automatic time setting control 92 on time switch 90 may be used which, after the set time, opens the circuit so stopping the motor and allowing the coils 87 to cool off.

2. 发明专利

GB572355A Improvements in or relating to traffic and other signal lights 未知
公开(公告)号：GB572355A
公开(公告)日：1945-10-03
申请号：GB1009044
申请日：1944-05-24
申请人： FRANK THOMAS POWERS
IPC分类号： G08G1/095
摘要： 572,355. Signal lamps. POWERS, F. T. May 24. 1944, No. 10090. Convention date, April 3, 1943. [Class 75 (iv)] An opaque open-ended tubular member 15, preferably an outwardly tapering cone, fitted intermediate its ends with a flat or curved light diffusing member 20 having a reticulated outer surface is attached to the casing 10 of a traffic or other signal light in front of each coloured lens 13. The lower portion of the member 15 is provided with a long narrow drainage slot 19 through which the light is visible to pedestrians. The member 20 may be of glass commercially known as "Factrolite" and its reticulated surface is preferably formed by a plurality of pyramids 21. It is held in place between a flange 22 and lugs 23 on the member 15. The members 20 may be coloured to allow the lens 13 to be dispensed with.

3. 发明专利

GB576846A Improvements in or relating to x-ray radiography 未知
公开(公告)号：GB576846A
公开(公告)日：1946-04-23
申请号：GB1909043
申请日：1943-11-16
申请人： FRANK THOMAS POWERS
IPC分类号： G03B42/02
摘要： 57 6 ,846. Radiographic cassettes. POWERS, F. T. Nov.'16, 1943, No. 19090. Convention date, Nov. 24, 1942. [Class 98 (i)] A cassette for radiography in which successive strips of X-ray sensitive material are exposed, is provided with a curved flexible window, a clamping plate which carries an electrically conducting layer and means operable in one direction for severing the exposed strip and in the other direction for clamping the sensitive material and the flexible window into substantially planar engagement with the wall of the cassette. The film 19 is wound from the supply spool 18 on to the take-up spool 23 by driving the latter and two friction rolls 48, 53, by means of gearing and belts 36, !38, 45, 49, 50 and a crank 52a. The film passes behind a window 13 of aluminium, synthetic resin or similar X-ray-permeable material. The window 13 and the opening in the front wall are bevelled at their edges, and the former is normally flexed inwardly so that when the clamping plate is applied the window becomes a true plane surface and its edges engage firmly with the retaining wall. A thin sheet of aluminium 17 covers the inner side of the window and discharges any static electricity present on the film 19. The take-up spool 23 is held in brackets, one of which 25 is hinged and retained by a toggle 30, the breaking of which allows the spool to be removed. The clamping plate 70 is provided with a pair of coaxial shafts 71, each of which carries a roller 72 rolling on rails 73. The plate is moved into and away from the clamping position by a series of toggles 90, 93, 94 hinged on shafts 80, 91, secured to the side walls of the cassette. The shaft 80 is provided with a crank-arm 84 which has a limited movement in an arcuate member 85. The clamping plate 70 comprises a backing plate 100 of lightweight material such as plywood, a shield member 101 of sheet lead, a flexible mounting member 102, e.g. of sponge rubber, an insulating member 103, e.g. of aluminium, and an intensifying screen 104, the whole being cemented together. The intensifying screen is, however, only secured at its corners. A reciprocating knife blade 110 severs the film, being driven by pinion gears 119 engaging toothed rack members 112 at each end of the knife. The gears 119 are rotated by toothed sectors 124 on lever arms 126, the other ends of which are bevelled and adapted to be engaged by lever arms 130 secured to the shaft 80. Consequently, the knife severs the film after the plate has been moved away from the clamping position, and does so by a movement of the crank-arm 84 additional to but in the same sense as that for moving the clamping plate away. In a modification (not shown), a detachable receptacle for the cut film is provided instead of the takeup spool and receives the severed film through light-tight slits. Alternatively, the front wall of the casing 10 and the receptacle may form a part of the wall of a dark room.

4. 发明专利

GB553046A Improvements in or relating to photographic cameras 未知
公开(公告)号：GB553046A
公开(公告)日：1943-05-05
申请号：GB374042
申请日：1942-03-20
申请人： FRANK THOMAS POWERS
IPC分类号： G03B27/46
摘要： 553,046. Photographic cameras. POWERS, F. T. March 20, 1942, No. 3740. [Class 98 (i)] A camera comprises means for feeding a length of the sensitive material to the image field, a support for the length of material to be exposed, suction means for holding the material on the support, and cutting means between the support and feeding means for severing the length from the remainder of the material. In the copying- camera shown, a body 1 set in the wall 8 of a dark room, from which the interior is accessible through doors 9, 10, contains two rolls of film 12, 13 of different widths, the ends of which pass respectively between feed rollers 14. 15 and pressure rollers 30, 31. The rollers 14, 15 are rotated bv external handles and operate through gears indicators showing the length of film fed. The film is fed in front of a platen 70, Fig. 5, and behind two vertical strip-form guides 49, 50. Figs. 3, 6, which are secured at their ends respectively to the upper and lower runs of sprocket chains 48, 51. The sprockets at one end of these chains are connected through bevel gears and a sprocket chain 62 for simultaneous rotation by a handle 45, thus allowing' the guides 49, 50 to be simultaneously and equally adjusted towards and from each other so as to overlie the edges of the film in use. The platen 70 is held between channelled side members 79, 80 secured together by shafts 85, 86. Rollers 86a, b on the ends of the shaft 86 engage in channel members 86c, d so that, by means of link mechanism 108, 109, 110, 111, 112 operated by rocking a shaft 105 carrying the links 108, the platen may be withdrawn from the position of use shown in Fig. 1 to a slightly forwardly-inclined position nearer the back of camera. After the required length of film has been fed behind the guides 49, 50 the platen is moved forward to the operative position shown in Fig. 1, when a mercury switch carried by one of the links 108 completes the circuit of a motor driving an exhauster which is connected by a hose 78 to cavities in the platen communicating with clusters of apertures 74 in the front plate 71, which is preferably of resilient material. The film to be exposed, which is thus held to the platen by suction, is then severed from the roll by traversing across it a circular cutter 38 which co-operates with a fixed blade 37 and is mounted on a carriage slidable on a bar 40 by means of an external handle. At the end of its traverse the carriage engages a lever which raises a rod 118 carrying cam collars 121, 122 adapted to engage arms 123, 124 frictionally secured to the shafts 16, 17 of the feeding rollers, so rocking the shafts and turning the feed rolls slightly backwards. The cut edges of the films are thus retracted, that of the film not in use remaining so until the film is again fed down, thus avoiding fraying of the edge by repeated passages of the cutter along it during use of the other film. After the length of film to be exposed has been thus severed, the platen 70 carrying it is adjusted vertically in the channel members 79, 80 by rotation of a shaft 87 carrying sprockets on which are sprocket chains 90, 91 secured to the platen. A spring 93 on the shaft 87 counterbalances the platen. The shaft 87 is rotated by a handle 98 through a sprocket chain kept taut by idler sprockets as the platen is moved between its front and rear positions.

5. 发明专利

GB367903A Improvements in or relating to cameras 未知
公开(公告)号：GB367903A
公开(公告)日：1932-02-29
申请号：GB3585330
申请日：1930-11-28
申请人： FRANK THOMAS POWERS
IPC分类号： G03B27/58
摘要： 367,903. Roll-film cameras. POWERS, F. T., 205, West 39th Street. New York, U.S.A. Nov. 28, 1930, No. 35853. [Class 98 (i).] Provision is made for housing a number of rolls of sensitive material (paper, film, &c.) of different widths, and means for feeding any desired length of material from any one roll into the focal plane. Disclaiming reference is made to a particular construction embodying this feature in Specification 367,902 concurrent herewith. The camera described has also, (a) a retractable pressure plate ; (b) an associated endless belt, automatically started on retracting the plate for assisting the passage of the film into the focal plane, and its subsequent discharge therefrom ; (c) adjustable means for masking the upper and lower edges of the exposed film for regulating and centering the exposed area ; (d) means for severing the film at the edge of the exposure ; and (e) a half-tone screen holder, adaptable for any size of screen, and adjustable to and from the focal plane. The apparatus may be constructed as part of an enlarging outfit, Fig. 1, with a roller carriage 6 for the lens, a scale 9, and object holder 11. The back of the camera has closure doors and may be mounted in the wall or partition of a dark-room 13. A number of film rolls are mounted on shafts 22, 23, 24, Fig. 2, within an upper compartment of the camera, each film being fed by rollers 35, 37 through a separate channel (e.g. 31, 32 or 33) to a common exit slot 30 at the top of the focal plane and just behind a sheet of glass 84, Fig. 3. The feed rolls 35 are operated by external handles 67, Fig. 1. To facilitate threading the films, each pressure roll 37, Figs. 2 and 6, can be retracted from the operated feed roll 35, by lateral bars 52 which move slides 39 having slotted bearings 42 for the pressure rolls. The pressure rolls are normally pressed against the feed rolls by springs 46. To facilitate feeding the film into the focal plane and to press the film flat against the plate 84 for exposure, a reciprocating pressure plate 86, Fig. 3, is provided the framework of which carries an endless feed belt 112. The feed belt only operates when the pressure plate is retracted. The plate 86 slides on lateral guideways in the camera and is moved to and fro by an external handle 94 operating the shaft 92 and linkwork 95, 101, 105. The endless belt 112 is operated by feed rolls 115, 116 positively driven by a motor 135 through a flexible shaft 134. The starting switch 138 of the motor is moved by the lever 137 on shaft 92 when the plate 84 is retracted. For masking a central area of the exposure plate 84, two slides 166, 160, Fig. 3, are adjusted by screw shafts 162 which are operated by bevel gearing 170, 171, Fig. 2, from an external handle 188, Fig. 1, and the set position is indicated by a scale 186. In a modified construction, Fig. 19, the upper masking slide 166 has side racks operated by a pinion shaft, and the lower slide 160 is connected by cords 247, over pulleys 248 so as to move synchronously. For feeding a measured length of film, determined by the length necessary to reach the edge of the lower masking slide 160, a rack bar 74, Figs. 1 and 8, with an indicator 78 is moved along a graduated guideway 75 by a pinion 68 loosely mounted on the end of the feed roll shaft 37, and coupled therewith by a crown tooth clutch 65, 69, Fig. 16, and resilient spring 70. To provide for cutting off exactly the exposed length, the film is fed backwards after an exposure until the upper edge of the exposed length is adjacent the slot 30. The forward feed and subsequent backward feed are indicated by scales 76, 77, Fig. 8, used in conjunction with the scale 186, Fig. 1, used for setting masking slides. For cutting the exposed film a knife blade 145, Figs. 2 and 15, is mounted on a guided block 146 and is drawn across the slot 30 by a rod 149. A half-tone screen 227 , Fig. 3, may be adjustably positioned in front of the glass plate 84. Different sizes of screen may be used. The screen is mounted between cross-bars 224, 227 carried by vertical uprights 200 which are mounted on slotted blocks 201, 202, sliding in fixed guideways 203, 204. The screen is positioned by a handle 216, Fig. 1, on the shaft 214 by means of crank and lever mechanism 206, 213 and 205, 209 connected by links 211. The setting handle 216 is fixed in set position by a pin engaging holes in the hub shaft of the handle. For holding screens of different sizes the holding bars 224, 227 are pivotally mounted on sleeves sliding on the uprights 200, and positioned by spring catches 228 engaging spaced holes 230 in the uprights. The screen is held between bevelled edges 225, Fig. 3, on the bars 224, 227 and front lugs 226 thereon, and the pivot mounting 224a, Fig. 11, of the bars allows for irregularities in the edges of the screen.

6. 发明专利

GB198908A Improvements in or relating to means for supporting lug straps on picker sticks 未知
公开(公告)号：GB198908A
公开(公告)日：1923-06-14
申请号：GB1594922
申请日：1922-06-08
申请人： ROBERT THOMAS POWERS SENIOR
IPC分类号： D03D49/38
摘要： 198,908. Powers, R. T. June 8, 1922. Picking-straps and connections.-Relates to readily adjustable means for supporting lug straps on the picker-sticks of textile weaving machinery. A bar 2, supporting the lug strap 7 between flanges 3, 4 at its ends, is held in frictional engagement with the picker stick 1 by a bolt 14 screwing through a plate 11 held in registering slots 10 in the ends of a U-shaped collar 5 surrounding the picker-stick 1 near the lower end of the bar 2. The plate 11 may be notched to engage the sides of the collar 5. The lug strap 7 may rest upon flanges 6 formed along the upper edges of the collar 5.

7. 发明专利

FR402728A 未知
公开(公告)号：FR402728A
公开(公告)日：1909-10-15
申请号：FR402728D
申请日：1909-05-05
申请人： SIDNEY A JOHNS , ORA THOMAS POWERS
发明人： JOHNS SIDNEY A. , POWERS ORA THOMAS
IPC分类号： B26B19/16

8. 发明专利

GB587539A X-ray cassettes 未知
公开(公告)号：GB587539A
公开(公告)日：1947-04-29
申请号：GB1009144
申请日：1944-05-24
申请人： FRANK THOMAS POWERS
IPC分类号： G03B42/04
摘要： 587,539. R÷ntgen - ray cassettes. POWERS, F. T. May 24, 1944, No. 10091. [A Specification was laid open to inspection under Sect. 91 of the Acts, Nov. 6, 1944.] [Class 98 (i)] A flexible. X-ray cassette comprises two sheets of lightopaque flexible material, one of which is permeable to X- rays, flexible means serving to hold the sheets in edgesealed spaced relation and separable as along one edge so that the sheets may receive in the space between them a light-sensitive element and one or two intensifying screens, and an air-duct connected to said space for removing air therefrom to cause said sheets to be drawn together so that they press the liglitsensitive element and the screen or screens into close contact. As shown in Fig. 2, a flexible cassette comprises sheets 90, 91 as of synthetic resin or hard rubber, which are light-opaque but permeable to X-rays, spaced apart by a sealing strip 97 as of hard rubber cemented thereto which extends around all four edges, said strip having along three edges an air duct 98 communicating by lateral ducts 99 with the space between the sheets, and having along the fourth edge a lipped slit 102 through which a light-tight envelope containing a double-coated light-sensitive film with an intensifying screen on each side of it may be thrust into the cassette. Suction is applied via a flexible pipe 104 to withdraw air from the cassette, and cause the flexible sheets 90, 91 to compress the screens against the light-sensitive film. The Specification as open to inspection under Sect. 91 describes a modification which is not flexible as a whole, wherein a flexible sheet 110, Fig. 5 (Cancelled), as of synthetic resin is sealed along its margins in a rigid frame 111 as of metal having a continuous U-shaped'edgechannel 112. A frame 113 in this channel is cemented to both the sheet 110 and frame 111, and has an air-duct 124 extending through the frame 111. A rigid plate 117 rests removably within the frame 111, and carries along its edges a continuous flexible sealing strip 118 bearing against the frame 113. The plate 117 may be hinged along one edge to the frame 111 so that it may be turned up to permit insertion of a light-sensitive film 115 and intensifying screen 116, and is secured in closed position after the insertion by means of centrallypivoted bent pressure springs 121 engaging at their ends in the channel 112 of the frame 111. Suction applied through the duct 124 causes the sheet 110 and plate 117 to compress the film and screen between them. This subjectmatter does not appear in the Specification as accepted.

9. 发明专利

GB582956A Improvements in or relating to photomechanical reproduction 未知
公开(公告)号：GB582956A
公开(公告)日：1946-12-03
申请号：GB1362844
申请日：1944-07-17
申请人： FRANK THOMAS POWERS
IPC分类号： G03F5/24
摘要： 582,956. Photo - mechanical printing processes. POWERS, F. T. July 17, 1944, No. 13628. Convention date, Sept. 1, 1943. [Class 98 (ii)] In a half-tone process, a high contrast antihalation light-sensitive, sheet is exposed in a, camera with the half-tone screen in normal position, the screen is removed, and the sheet is re-exposed to the same subject. The material may be panchromatic. On removal of the half-tone screen, a clear glass sheet of equal thickness may be substituted. The material is developed. in a high contrast developer, fixed and washed, and is then printed on to sensitized metal, which is developed and etched. The process may be applied to the production of three-colour or four-colour process plates, and the screen or subject may be rotated between the production of the component negatives.

10. 发明专利

GB554321A Improvements in or relating to photographic cameras 未知
公开(公告)号：GB554321A
公开(公告)日：1943-06-29
申请号：GB437242
申请日：1942-04-01
申请人： FRANK THOMAS POWERS
IPC分类号： G03B27/46
摘要： 554,321. Photographic cameras. POWERS, F. T. April 1, 1942, No. 4372. [Class 98 (i)] A photographic camera comprises means for feeding widely varying lengths of sensitive material to a support situated in the exposure position, together with means for moving each length over the surface of the support in order to centre it in relation to the exposure area. In the apparatus shown, the body 1 of a process camera is set in the wall 8 of a dark room, from which the interior is accessible through doors 9, 10. Rolls 13, 14 of different widths of light-sensitive film are carried on shafts extending across the body, and are fed downwardly by measuring rollers 15, 16 operated by external handles, the lengths fed being indicated on external dials. The strips pass between bars 33, 34, with the latter of which co-operates a knife 35 which by means of a handle 37 is drawn across the strip to sever the length which has been fed. Prior to being severed the length is held between a glass plate 38 and a press-board or platen 39. This platen is supported by rollers moving on rails 47, and is moved by means of links 40 connecting it to rocker arm plates 41, 41a connected by links 42 so that operation of the shaft carrying the upper plates 41 causes the links 40 simultaneously to move the platen 39 towards or from the glass plate 38. The pressboard is provided with a sliding panel 50, which is vertically adjustable by rack and pinion means 51, 52 operated by an external handle through universal couplings and a jack shaft 56. A dial indicates the distance the panel is moved down from its uppermost position. At the upper end of the panel is a chamber 64 with openings 65 in the front face of the panel and connected by a flexible tube 66 to a suction fan driven by a motor 68. After the fed length of film, gripped between the platen and the glass plate has been severed by the knife 35 the motor is started so that the suction produced at the openings 65 holds the film to the panel. The platen is then retracted and the panel adjusted on the platen until the cut portion of the film is centered in the exposure area. The platen is then moved forward to press the film againt the glass plate, the motor is stopped, and the slidable panel raised to its uppermost position. After exposure of the film the platen is retracted, allowing the exposed piece of film to fall and a new length to be fed down. In a modification, suction cups sunk in the top of the slidable panel are connected to a cylinder in which a weighted piston moves down to create the suction effect, the piston being raised by a cord-operated lever when the suction is to cease. Specification 367,903 is referred to.

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