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    • 95. 发明专利
    • Improvements in and connected with printing machines
    • GB145938A
    • 1920-07-08
    • GB1287419
    • 1919-05-22
    • HERBERT BONHAM
    • B41F3/80
    • 145,938. Bonham, H. May 22, 1919. Cylinder machines; tripping- arrangements.-Cylinder machines are so constructed that the cylinders are driven in a substantially continuous manner from the reciprocating motion of the bed, or of the carriage which carries the impression cylinder when the machine is of the travelling-cylinder type, the arrangement being such that the cylinder is driven from the bed &c. by two sets of gear-wheels which each act in one direction only, one set of wheels comprising one more driving-pinion than the other. As applied to a machine with a fixed cylinder c and a bed b reciprocated by crank, rack, and pinion mechanism m , m , m , m , m , m , the bed is provided with two racks h, k, Fig. 2, of which the rack h gears with a pinion g which drives a loose wheel e at the end of the cylinder. The rack g is geared to a similar loose wheel f by means of two wheels j, i, and between the wheels e, f is arranged a wheel l fixed to the cylinder c. The wheel l is provided at each side with projections in axial alinement, which are engaged alternately by pivoted catches e , Fig. 3, on 'the wheel e, and by a similar catch on the wheel f. The wheel e drives when moving in a clockwise direction as seen in Fig. 3, and the gears are so timed that the catch on the wheel f takes up the drive when the wheel e is reversed in motion. The catches e are normally pressed outwards by springs l , but just before the catches reach the driving position they are moved inwards by wedges on the driving-pins, and after passing these wedges they snap into driving position. The cylinder is raised during the movement of the bed in one direction by means of lever arms c pivoted to the spindle of the gear-wheel i, and to the frame in alinement therewith, the arm c being actuated by links c and toggle &c. mechanism. The sheets are fed from a board s, Fig. 1, preferably provided with a pivoted end s' and are delivered by endless tapes o driven by gearing from the cylinder c. According to the Provisional Specification, the wheels e, f may be arranged at opposite ends of the impression cylinder.
    • 97. 发明专利
    • Improvements relating to the Driving Mechanism of Printing Presses.
    • GB191221449A
    • 1913-08-07
    • GB191221449D
    • 1912-09-20
    • GOSS PRINTING PRESS CO ENGLAND
    • B41F3/80
    • 21,449. Goss Printing Press Co., [Goss Printing Press Co.]. Sept. 20. Driving printing-machines.-An electric motor drives a printing - press through high or low speed gearing, electric switches being arranged in connexion with the clutch mechanism so that the press must be driven at a low speed before the high-speed mechanism can be operated. The wheel 11 on the shaft 12 of the press is driven by the electric motor 13, Fig. 5. The motion is communicated through low-speed gearing 14, 16, 20, 22 when the clutch 19 is thrown in, and the press is driven at its full speed when the clutch 25 is thrown in. The low-speed clutch is operated by the lever 38 by means of link 39, shaft 41, and links 42, 43, and the high-speed clutch is operated by the handle 29. The spindles 41, 43 through which the low and high speed clutches are operated carry switch arms 46, 49, which make contact across pairs of contacts 47, 48 and 51, 50. These contacts are connected to a number of switches 74 ... 77 in series and a number of switches 81 in parallel. The circuit includes a switch 87 and a solenoid 93. When the lever 38 is operated to throw in the lowspeed clutch, the arm 46 makes contact between the contacts 47, 48. If all the series switches 74 ... 77 are closed and one of the switches 81 is closed, a current flows from the main 53 to the main 52 through the switches and the solenoid 93, thereby raising the core 95. The core raises the switch 87 and inserts the resistance 91 in the circuit, the diminished current being sufficient to hold up the core. The core also carries a contact 96 which bridges the contacts 97 and completes a circuit through the starter 101 and the motor 13 so that the press is driven at the low speed. This may be changed to the high speed by operating the lever 29 to throw in the high-speed clutch 25. At the same time the switch arm 49 passes between the contacts 50, 51 and so maintains the actuating-circuit, whereupon the arm 46 on the low-speed mechanism is withdrawn from the contacts 47, 48. If by mistake the high-speed lever 29 is operated before the low-speed lever 38, the circuit across the contacts 50, 51 is completed. but includes the resistance 60. The resulting current is thus diminished and is too weak to operate the solenoid core 95 so that the motor does not start. Push - buttons 85 may be shunted across the ordinary operator's switches and placed at convenient points in the press to enable a very small degree of movement to be given to the press.
    • 98. 发明专利
    • Improvements in Flat-bed Stop-cylinder Printing Machines.
    • GB191123009A
    • 1912-08-15
    • GB191123009D
    • 1911-10-18
    • WILLIAM DAWSON & SONS OTLEY LTELKANAH STOTT
    • B41F3/80
    • 23,009. Stott, E., and Dawson & Sons, W. Oct. 18. Stopping and tripping arrangements.-A flat bed stop-cylinder printing-machine is fitted with a brake-mechanism consisting of an axiallymovable disk, which cannot rotate, coacting with a disk fixed on the end of the shaft of the impression cylinder, and with this may be combined cam-actuated oscillating segmental gear which engages a similar gear on the impression cylinder to return the cylinder to its starting position from the extreme position to which it is moved in the normal working of the press. As shown in Fig. 2, the brake disk E is prevented from rotating by a bracket L mounted on a fixed stud M, and it is moved axially to engage a fixed disk A on shaft D of the impression cylinder. The disk E is moved axially by means of engaging cam-surfaces H, I, the former being actuated by a cam-operated lever G, a washer K acting to take the thrust. The axial movement may be produced by a cam-actuated eccentric, or by threading the disk G internally and causing it to engage a threaded part attached to the disk E. Packing F is arranged between the disks E and A. As shown in Fig. 4, the impression cylinder is fitted with a projection C which runs past its stop B, and the cylinder is returned to cause the parts C, B to engage by means of a cam &c. operated spur-segment O which engages a similar segment N on the cylinder.
    • 99. 发明专利
    • Improvements in Variable Speed Mechanism for Printing Presses.
    • GB190918706A
    • 1910-07-14
    • GB190918706D
    • 1909-08-13
    • LAKE WILLIAM EDWARD
    • LAKE WILLIAM EDWARD
    • B41F3/80
    • 18,706. Lake, W. E., [Goss Printing Press Co.]. Aug. 13. Driving printing-machines.-Relates to variablespeed gearing for printing-presses of the kind in which a driving-shaft can be connected to a driven shaft either through a friction clutch for a high speed, or for a low speed, through gearing comprising a countershaft, toothed and friction trains, and ratchet mechanism which is automatically disconoected when the high-speed clutch is brought into engagement. This clutch 35, Fig. 1, is slidable on a feather on a driving-shaft 13, which receives power through a pinion 15 from a high-speed motor. A gear 33, which drives the press, is secured to a friction-gear 31 which carries a coacting clutch-member 34. A countershaft 21 carries a friction-pinion 28, adapted to engage the gear 31, and a spur-wheel 20 in mesh with a pinion 27 loose on the shaft 13. Pawls carried by a disk 18 secured to the pinion 17 may be engaged and driven by a ratchet-wheel 16 fixed on the shaft 13. The shaft 21 is mounted in eccentric bearings 22, 23 so that it may be moved away from the shaft 13 so as to disconnect the gears 28, 31. With the friction gearing and clutch both disengaged, the press is not driven. When the pinion 28 is moved against the gear 31, the wheel 16 drives the pinion 17, and the low-speed countershaft drive comes into operation. On sliding the clutch 35 into engagement, the high-speed drive is brought into action without previously disconnecting the shaft 21. The pawls then overrun the wheel 16. A brake 101 may be applied to stop the press. The clutch 35, the bearings 22, 23, and the brake 101 are operated in succession from a rock-shaft 52 by a single hand-lever 54, which carries two pawls 62, 64, Fig. 6, and a cam 65.