A new and very simple method of producing the alternate motion of a mangle-box, by the continuous motion of the handle in one direction, invented by John Thurrel, was lately communicated to the Society of Arts, a plan of which is represented in the subjoined engraving, a a is the mangle-box, b b parts of the frame which support the axis cc; d the cranked handle, e and f two barrels loose on the axis cc; to the barrel e are fastened two cords, one of which, after making several coils round the barrel, passes from its under side to the eye h, where it is secured; while the other, after having in like manner coiled round the barrel, is also delivered from its under side to the eye g. To the barrel f are also fastened two cords, which being delivered from the upper side of the barrel are respectively fixed in the eyes i and j The part 1c of the axis, between the barrels, is made square, and is cut out longitndinally to receive the lever l, which is secured in its place by a pin, but so as to allow of lateral motion between the two barrels; each of these barrels has a stud m and n, so placed that the lever may be shifted to engage either of them, and consequently to oblige that barrel with which it may be engaged to revolve, together with the axis; o and p are two alternating irons, each with an eye at one end, through which a pin q passes, in order to fasten them to the mangle box; their height above the box is such as to allow them just to clear the axis when passing under it, and the motion of each is limited, but on opposite sides, by the adjusting pins rr.
■ The figure represents the lever l as engaged with the stud n, and consequently as being fixed in the barrel e; now if the barrel is turned so as to wind up the cord h, the cord g will proportionably unwind, and the mangle-box will move from left to right till the end l of the lever comes in contact with the alternating iron at the point o. By continuing to turn the handle, the end of the lever slides from o to the end of the iron, and is brought into the position shown by dotted lines; the stud n is consequently disengaged, and the barrel e becomes loose; at the same time the lever engages the stud m, and fixes the barrel f. The handle being still turned in the same direction as at first, begins to wind up the cord i, and thus makes the box begin to move from right to left, the cord j at the same time unwinding proportionally. When the left hand alternating iron has begun to come under the axle, the end of the lever will touch it at a, will slide along it to the point of the angle, and in doing so will bring it to the position shown in the figure, the barrel e being now fixed, and the barrel / being loose. Thus is accomplished the production of an alternating motion of the box, by continuing to turn the handle always in the same direction.
The back of the lever l is bevelled off, so that if the handle is turned in a wrong direction, it passes between the studs m and n, and not engaging either barrel produces no motion of the mangle-box. Fig. 2 is one of the barrels separated; and Fig. 3 the square middle part of the axis, showing the slit in which the lever traverses.
In 1823, a patent was taken out by Mr. Snowdon for an erect or vertical mangle, by which it was intended to obviate an objection sometimes made to the common horizontal mangles that we have been describing; namely, the great space they occupy. Several patents have indeed been taken out for mangles of the vertical kind; but, for reasons that we are not acquainted with, have not been much patronised by public adoption. The following invention was patented in 1828, by Mr. Samuel Wilkinson, of Holbeck, in Yorkshire, but, as stated in the specification, the machines so constructed were to be called "Bullman's Cabinet Mangles." The annexed figure affords a side view of the principal parts of the machine, those which are omitted being left out for the better elucidation of the more essential parts, a a represents one side of the frame, b one of the cheeks supporting the lower roller c; the upper roller d rests upon the lower one. Pressure is given by a weighted lever e, suspended by the red f from another lever g, which turns upon a fulcrum at h, and has a piece of hardened steel k dovetailed into it, against which the axis of d works.
The lower roller c has a wheel on its axis, turned by a pinion on the axis l of the fly wheel m, and the fly wheel is made to revolve by a handle on one of its arms. To raise the upper roller to place under it the articles to be mangled, the arm g is connected to a similar arm on the opposite side by a cross bar n, suspended by a chain from the wheel o, which being turned by the lever n, elevates the arm g, and with it the upper roller d. The line r merely represents the situation of the mangling cloth. The patentee is silent in his specification as to the mode of working the machine, whether by continuous or reciprocating action. Some articles will require to he passed under the rollers more than once, and we can discover no method in the present machine, of doing this, but by reversing the motion, which will require attention on the part of the mangier, who must watch until the goods are nearly past the rollers, and then reverse the motion; whilst the common mangle performs this of itself. If the mangling cloth were an endless web passing over other rollers, a rotatory motion alone would be required; but the patentee does not state in his specification that he uses any such arrangement.
The machine seems calculated to obtain a considerable degree of pressure in a convenient manner.
The sketch below is taken from a small model of a mangle that was exhibited amongst others at the National Repository, invented by Messrs. Brook and Webster, of Thornhill, in Yorkshire, a is a drum or cylinder, at one end of which, and on the same axis is fixed the toothed wheel b, which is turned by the pinion c by the revolution of the winch p. d and e are two rollers, round which the cloth to be mangled is wrapped; these rollers are placed in the curved arms shown, which turn upon centre pins at f g; h and i are levers, the bended ends of which fit into sockets in the curved arms; (in the model, the levers were rivetted to the arms, which the editor considered to be inconvenient) o o are weights suspended to the levers to give the pressure, which can be increased or diminished at pleasure, either by altering the actual quantities of the weights or changing their situation on the levers. In order to remove the clothes from either of the rollers, or to put others on, the weights must be taken off the lever, the lever must be lifted out of its socket or be lifted up with the curved arm which turns upon its end, and be thrown back together.
With some slight modifications (such as an easy mode of removing the load from the levers, etc.) this compact mangle may be made very convenient and effective.