[Figure 55] represents a top view of the machine. S is the barrel upon which is wound a cord, sustaining a weight which drives the clock train, and upon the same shaft with it is a cog wheel driving the pinion, m, on the shaft, T; and on the same shaft, T, is another cog wheel, driving the pinion, n, of the type wheel shaft, I′. K and K, are the helices of the large magnet, of which H and H are the soft iron arms. M, M, M, M, are the blocks which support the instrument. F and F is the lever, a and a its adjusting screws; x′ and x′ its axis; k and k are the two upper coils of the two electro magnets at the back part of the instrument for purposes hereafter to be described; x is the wire soldered to the plate buried in the ground; p is the wire proceeding to the battery; c is the connecting wire of the two electro magnets, k and k; w is the support of the pendulum; v is the escapement wheel; A is the type wheel; D and D is the printer, and B the roller over which the paper, P, is carried.
Fig. 55.
Fig. 56.
[Figure 56] represents a back view of the instrument; k, k and k, k are the coils of two electro magnets, surrounding the soft iron bars, d, d and d, d; b and b are the flat bars through which d, d and d, d pass, and are fastened together by the screw nuts c, c and c, c. The right hand electro magnet is fastened to the blocks, M and M, by the support, f and f; from which proceeds a bolt passing between the coils, k and k, and the block, h, with a thumb-nut upon it, by which the whole is permanently secured. In the same manner the left hand magnet is secured to the block, M. R′ is the outside portion of the brass frame containing the clock work. W is a standard fastened to R′, for supporting the pendulum, Y. X, Y, and l are parts common to a chronometer for measuring the time, viz. the escapement and pendulum. The escapement wheel has 24 teeth, corresponding in number with the type on the wheel, and such is the arrangement of the parts, that when the pendulum is upon the point of return, either on the right or left hand, a type is directly over the paper, and the armature, g, is near the face of one or the other of the magnets; so that, if an impression is to be made with the type, thus brought to the paper, the pendulum, Y, is ready to be held by the magnet at the same time from making another swing until the type has performed its office, which will be hereafter explained.