Patent GB-464188-A (GB)
Title: Improvements in or relating to vibration-isolating mountings for high speed rotary printing presses
IPC: F16F15/08
Filed: 1936-08-24
Abstract: 464,188. Bar springs. GOSS PRINTING PRESS CO. Aug. 24, 1936, No. 23210. Convention date, Aug. 24, 1935. [Class 108 (iii)] [Also in Group XVI] To enable high-speed rotary newspaper printing-presses to be constructed in buildings of steel frame construction having a large number of floors each perfecting unit of a multi-unit set is mounted in a frame which is carried by a spring mounting arranged between the frame and a foundation for isolating the press vibrations with respect to the foundation. As applied to a press in which a number of perfecting units 10 and a folding unit 20 are driven in unison by vertical shafts 14, 22 geared to a horizontal shaft 15, the units 10, 20 are mounted on bed frames 25 bolted together, and the frames 25 are carried at each side by a pair of U-shaped frames 30, 31 bolted together at their end flanges 32. The frames 31 are supported by firm foundations having the form of concrete wells 35, and vibration-isolating mountings are provided between the parts 31, 35 and serve to support the units of the press in aligned, substantially unchanging relation to each other and so ensure proper operation of the press and also prevent objectionable vibration of the foundation. The spring- mounting preferably comprises eight springs 40, Fig. 5, arranged in two groups of four long narrow springs made of high grade spring steel held apart at each end by an adjustable spacer bar 43 through which passes a bolt 41 serving to connect the springs together. The bar 43 is integral with a saddle 44 formed with a concave recess 45 for receiving a cylindrical fulcrum 46 upon which rests the side-supporting frame 30, 31. The springs 40 are pivotally supported on fulcrum blocks 52 mounted in jack-plates 55 which are vertically adjustable relatively to the foundation. The blocks 52 support saddle plates 50 upon which the springs 40 rest, the saddle plates being adjustable longitudinally and being formed with projecting lugs 51 arranged between the groups of springs 40. The fulcrum blocks 46 are arranged near the ends of the springs and the blocks 52 are arranged close to the blocks 46, but so that the distances apart of the fulcra at the different ends of each group of springs are not equal, and the distance apart of the fulcra 52 is arranged so as not to be an exact multiple of either of the distances between the fulcra 46, 52, so as to avoid harmonic vibration of the springs. The upper surfaces of the horizontal reaches 31 of the side frames are formed with pads 61-upon which are mounted supports for the magazine reel 17. In a modification, Fig. 7, cantilever spring bars 70 are used and extend inwardly from either side to a point closely adjacent to the centre of the frame 30, 31. The inner ends of the bars 70 are mounted on rods 71 which are centrally supported in a block or pedestal 74 supported in brackets 75, 76 carried by bolts 77 attached to a vertically adjustable support 55<1>. The number of bars 70 on one side of the block 74 may differ from the number on the other side.