Patent GB-190309325-A (GB)
Title: Improvements in Justifying-space Casting Mechanism for Type Casting and Composing Machines
Inventor: WEHRLIN MAURICE
Filed: 1903-04-24
Granted: 1904-04-21
Abstract: 9325. Wehrlin, M. April 24. Monotype and like machines.-Relates to the justifying or space - casting mechanism of type casting and composing machines, such as that described in Specification No. 18,542, A.D. 1900. In the present arrangement, the justification is effected only by addition to the normal or provisional space, and five longitudinal rows of perforations in the strip, numbered 1 to 5 in Fig. 1, suffice for justification purposes. The transverse rows of perforations I, II, III, IV are used for justifying, as before. In the row I, the perforations 1, 2, 3, 4 represent, respectively, one, two three and four spaces, and the perforation 5 represents eleven units of space correction or addition. In the row II, the perforations 1 to 5 represent, respectively, one, two, three, four and eleven units of space correction or addition. When the row I comes into operation, the contact arm 12 is on the contacts 24, 24<x>, Fig. 2, each of the perforations 1, 2, 3, 4, when present, closing the circuit through the magnet 25<xx>, by means of contact closing devices 1', 1<x>, 1<xx>, &c., which operate as in the prior machine. The perforation 5 of row I closes the circuit through the magnet 30<xx>. When the row II comes into action, the arm 12 is on the contact-piece 23, and all the perforations close the circuit of the magnet 30<xx>. The size of the mould 108, Fig. 6, is varied by a slide 107, 105, carrying an adjustable screw 106, the movement of which is limited by a series of justifying-discs 51, 53, 58, 98, 98<x>, having a total thickness which is varied by the justifying-mechanism. The adjacent faces of the discs 51, 53 are stepped so that a rotary movement of the disc 51, by ratchet gear operated from the magnet 25<x> causes a reduction of one unit in the size of each space cast. A space is cast each time a row III on the strip comes into action. The magnet 30<x> <x> operates ratchet gear, which rotates the disc 58 through a number of steps corresponding with the values of the perforations and the required increase in thickness of the spaces. The contacting-faces of the discs 58, 98 are inclined or wedge like. As the spaces are cast, the disc 51 is turned back one step at each casting of a space, and, in cases where the number of spaces in the line is not evenly divisible into the shortage of the line, the disc 51 is returned to normal position before all the justifying-spaces are cast, and adds one unit to the thickness of the succeeding ones. The justification is effected on a certain maximum number of spaces (10 in the case illustrated), and when the number of spaces in a line exceeds this number, an addition is made to the thickness of the remaining spaces, in order that the contrast between these and the justified spaces may not be so great as to be visible in the printed matter. This is effected by the disc 98<x>, which has a stepped face abutting against the stepped face of the disc 98. When, after the casting of the tenth space, the retaining-pawls are moved to permit the discs 51, 58 to return to normal position, the disc 98x is rotated to increase the thickness of the eleventh and succeeding spaces.