170 ULLMER'S PATENT PAPER-CUTTING MACHINE, (Patent dated August 10, 1855.) MESSRS. ULLMER, of Fetter-lane, London, have just patented some very useful improvements in machines for cutting paper, card, and mill-boards, and other like substances, which improvements consist in certain methods of imparting to the knives of such machines a diagonal or draw cut, and also in a means of raising and lowering the knife. Fig. 1. of the engravings on the preceding page is a front elevation of one of Messrs. Ullmer's paper-cutting machines, and fig. 2 a side view. A A is the frame; B the platform or table; C the knife lever; c c cutting-blade secured to the knife lever by bolts and nuts; DD guides for the knife to work in; E cross-bar, secured to the guides, D D; F screw working through the centre of the cross-bar, and carrying a platten, G, which is free to rise and fall in slots in the back of the guides, D D. H is a gauge or stop connected to the sliding bracket, J, which is fixed by screws descending through a slot in the platform, B, to a similar bracket beneath the platform; on one end of this bracket is formed a nut, K. L is a screwed shaft which works under the table of the machine, and through the nut, K; the slot formed in the table allows the block, I, to move forward or backward according to the motion imparted to the nut by the screwed shaft; d is a winch handle for turning the rod. M is a bell crank connected at e by a pin to one end of the knife lever which it supports, and at f to an adjustable connecting rod, N, united to a crank on the end of the shaft of the main spur wheel as hereafter described; the fixed centre of the bell crank is at g, where it is connected to the frame of the machine by a pin, about which it is free to oscillate. The opposite end of the knife lever is supported upon another adjustable connecting rod, O, united to a crank formed by a pin and one of the arms of the main spur wheel. Both connecting rods are formed with a bar, h h, threaded with a right-hand thread on one end, and a left-hand thread on the other, which work into two threaded sockets. ii, kk, are parts forged on the bars, hh, in the shape of nuts for turning them, and thereby raising or lowering either end, or both ends of the knife, as required. P is a shaft supported in bearings in the frame, driven by a winch handle, P (not shown in fig. 1). Q is a pinion on the shaft, P, which gears into a toothed wheel, R, on another shaft, S. T is another pinion on the outer end of this shaft, which gears into and drives the main spur wheel, Ú, keyed on a shaft, V, the opposite end of which carries a crank, W, to which the connecting rod, N, is affixed. 9 is a pin on one of the arms of the spur wheel, U, to which the connecting rod, O, is affixed. A crank is thus formed on both ends of the shaft, V, to which the connecting rods, N and O, are affixed. X is a fly-wheel on the driving shaft, P. screw, F, is turned The operation of the machine is as follows:-The paper, card, or other board to be cut is placed upon the table, and pushed back against the stop or gauge; the down, and the platten thereby depressed on to the paper, just behind the path of the knife whereby the paper is held tight. The winch handle is then turned, and through the gearing cranks and connecting rods the knife is brought down in a slanting direction, and Continuous rotation in the same direction causes caused to make a diagonal drawing cut. the knife alternately to rise and descend, performing at cach descending stroke a diagonal drawing cut. LONDON FIRES IN 1855.* By Mr. William Baddeley, C.E., Inventor of the Portable (Concluded from page 153.) The following tabular analysis exhibits, in each instance, the occupancy of that part of the premises in which the fire originated, illustrating the comparative liability to accident by fire of various trades, manufactories, and private dwellings : * Errata in first portion of Fire Report (see last week's No.) Page 149, seventh line from bottom, for Page 150, eighth line from bottom, for for "falling," read "fallen." Their distribution through the hours of day and night have been in the following pro portion : The causes of fire, so far as could be satisfactorily ascertained, have been the following: Accidents, unforeseen, and for the most part unavoidable Areas, fire thrown down' Flues, foul and ignited. 31 69 defective and overheated 42 hot air Charcoal, hot. Carelessness, palpable instances of Children, playing with fire Cinders, put away unextinguished Coke, put away hot Copper, portable lucifers gunpowder.. Fumigation, incautious Gas, escape of, from defective fittings. 79 accidents in lighting Hearths, defective Hot-plate 23 19 4 6 4 defective 3 13 Hot-water pipe, heat from 1 11 |