The axis on which the lever, i, is articulated is eccentric, and is provided on the side opposite the lever with a needle, k, revolving on a dial. The object of this arrangement is to regulate the machine according to the thickness of the book.
FIG. 1.
Machine to be Operated by a Motor (Fig. 3).--This machine, although working on the same principle, is of an entirely different construction. It is designed for binding books of all dimensions. It consists of a frame, a, in two pieces, connected by cross-pieces, and carries a table, u, designed to receive the sheets before being bound together. Motion is transmitted by means of a cone, c, mounted loose on the shaft, b. To start the machine, the foot is pressed on the pedal, m, which, through the intermedium of links and arms, brings together the friction plates, d, one of which is connected with the shaft, b, and the other with the cone, c. When it is desired to stop the machine, the pedal is left free to itself, while the counterpoise, s, ungears the friction plates. The machine fastens the paper with galvanized iron wire wound round bobbins placed at the side of the apparatus. This wire it cuts, and forms into staples.
FIG. 2.
The book to be bound is placed on the support, h, and the arms, k, that carry the fasteners cause it to move backward and forward. It also undergoes a second motion--that is, it moves downward according to the number and thickness of its pages. This motion, which takes place every time the operator adds a new sheet, is regulated by a cog-wheel register, l, which is divided, and provided with a needle.
The iron wires pass from the bobbins on a support to the left of the machine by means of feed rollers, which thrust them through the eight clips. In the interior of these latter there is a double knife, which, actuated by one of the cams of the wheel, e, cuts the wire and bends it thus
. The extremities of the staples are thrust through the back of the half opened leaves, and then bent toward each other thus