Patent GB-190512626-A (GB)
Title: Improvements in Apparatus for Embossing Braille Point Characters for the Use of the Blind.
Inventor: CANTELO JOHN LOUIS
Filed: 1905-06-19
Granted: 1906-04-05
Abstract: 12,626. Cantelo, J. L. June 19. Typewriters and like machines.-Relates to a machine for embossing braille type. The device comprises a wooden bas e A, Figs. 1 and 3; having metal side-plates B, B<1>, to which is pivoted, by means of depending lugs, a matrix bar C, having sets of six cells at intervals along its length. The matrix bar C is normally held in the position shown in Fig. 3 by a spring D, which is mounted on screws d' and engages lugs c<2> on the bar. To the base A is secured a toothed plate E upon which slides a carriage F, provided with six vertical embossing pins g, corresponding with each set of cells in the matrix bar L. The pins are operated separately by means of six keys G, each of which operates a central spacing-bail H, pivoted to the cover-plate I of the carriage F by screws h, the keys G and the bail H being normally raised by springs. A projection h<2> on the spacer H passes through a slot in the carriage F and enters a recess between teeth on the bar E when a key G is operated, to ensure alinement of the pins g and the cells in the matrix bar. The carriage F is recessed on its underside to accommodate a pawl J which engages a toothed plate E. When the spacer H is depressed, a projection thereon engages the tail j<4> of the piwl J, by which the latter is oscillated to feed the carriage F, the motion being limited to one tooth by a reversed pawl j<6>. The paper is passed over the wire D, beneath the matrix bar C, and between two pairs of rollers k, k<1> which grip the margins, the lower rollers being mounted on a spindle k' resting in notches k<3> in arms k<4> on the bar k. The rollers k, k<1> gear at their outer ends only, the top of the teeth being removed along the greater part of their length to accommodate the paper. On the bar K being raised by depression of the end l of the lever L, pivoted on a screw l<1>, the arms k' turn on the apices k<7> resting against the plate b, thus compressing the spring k<6> and allowing the spindle k<2> to drop to facilitate the introduction of the sheet of paper, which is adjusted against the projecting edge of the plate K. The spindle k<2> is turned to feed the paper by a winged head M, provided with a detent m, which operates at each quarter-revolution. The teeth on the plate E are cut away on the underside to permit of the carriage being tilted to disengage the pawls so that the carriage may be moved freely in either direction. The writing may be exposed by depressing the wire D and tilting the matrix bar C forward. The embossing point is located by means of a U-shaped wire N. One member lies within a groove a<3> in the base A, while the other rests on the matrix bar C. The wire is capable of sliding to the left, and the ends n, n<1> are so arranged that when the end n<1> engages the carriage F, the end n indicates the position of embossing-pins. The base-board A is embossed with two series of numerals 0, 0<1> in braille type, the numeral uncovered by the recess o in the space bar H indicating the position of the embossing- needles g with regard to the matrix bar C. On the carriage F reaching the extreme end of the line, the keys G are locked against further operation by the projection h<2> coming opposite a tooth in the bar E. A modified form of paper-feeding device for supporting the sheet along its whole length is described. In this case, the rollers k, k<1> are dispensed with and the paper held by a clip Q, Fig. 9, which is placed transversely across the sheet. Pins q<2>, q<3> fit into corresponding holes in the extended base of the machine. One set q' are in advance of the set q<3> by half the distance the sheet is fed forward between each line, so that, on reversal of the clip Q to print on the other side of the paper, the lines fall between those originally produced.