US1135344A - Printing-telegraph alphabet. - Google Patents

Description

C. G. ASHLEY. PRINTING TELEGRAPH ALPHABET.

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hmfi m% Patented m: 13, 1915.

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CHARLES G. ASHLEY, OF CHICAGO, ILLINOIS), ASSIGNOR T GENERAL ENGINEERING AND CONSTRUGTIGN COMPANY, LIMITED, 0F TGRONTG, CANADA, A CORPORATION OF ONTARIO, CANADA.

PRINTING-TELEGRAPH ALPHABET.

1 135 344 Specification of Letters Patent. Patgnfged App, 13 191,5 Application filed June 20, 1911. Serial No. 634,199.

To all whom it at 11 concern record of the impressions of all of the type Be it known that 1, CHARLES Gr. Asi-rnni, faces such as would result from utilizing all a citizen of the United States of America, of the alternations of an alternating current and a resident of Chicago, county of Cook, for imprinting purposes. Fig. 3 is a view a and State of Illinois, have invented a new of my improved alphabet together with the and useful Improvement in. Printing-Telenume'als from 0 to 9 inclusive, so spaced graph Alphabets, of which the following is with regard to Fig. 2 as to illustrate the a specification. principle of its design.

My invention relates to a Roman alpha- As there are numerous methods and to bet, the characters of which are built up means known in the printing telegraph art from predetermined combinations of imfor selectively operating types having faces pressions from four elemental component similar to those shown in Fig. 1, it is not types, the impressions being potentially, pedeemed necessary in this disclosure to illusriodically recurrent considered lineally trate any definite arrangement of appara- 115 along the line of writing. tus or circuits for the operation of the types My invention finds its chief application in shown. Assuming therefore that the type automatic printing telegraph systems in faces as shown in Fig. 1 are maintained in which a plurality of component types are such relation to a recording surface that electro-ma gnetically controlled and operated each may record an impression thereon, that an by current impulses over line conductors, the recording surface be moved under the the selection being consummated by means 7 type as viewed in Fig. 1 from right to left of a perforated transmitting tape. In the at a speed which is commensurate with the practical application of such systems it has alternations of the alternating currents used, been proven that under all line conditions and that the distance between any two maxi- 25 and especially under adverse line conditions, mum current values is further commensua higher transmission efficiency is attained rate with the spacing between the types as by the use of an alternating current. The indicated by the spaced inclined lines in use of an alternating current, however, im-

1. Assuming further that type face 1 posesas a requirement for high speed trans- 1s operated by a positive potential, then 30 mission that a maximum number of the alfrom the foregoing it follows that type face ternations in a current of a definite he 3 is operated by the next succeeding negaquency shall. be utilized to imprint predetlve impulse, type face 2 is operated by the termined types, in order that the maximum next succeeding positive impulse while type imprinting possibilities of a current of a face 1 is operated by the next succeeding 35 definite frequency may be realized. negative impulse. Therefore, if an alter- My invention has as its object to provide nating current of a predetermined frequency a directly readable Roman alphabet the be placed through the controlling magnets characters of which are imprinted from imof the types l, 3, 2 and 1, they will be impressions of component types available for printed in cyclic distribution on the receivto selection only in cyclic order. 1 accomplish ing tape and the resultant record will be a this and other desiderata by utilizing a de continuous lattice as shown in Fig. 2. sign of character that is built up from a Referring again to Fig. 1 it will be noted number of predetermined impressions from that type faces 1 and 3 are each in width component type faces, the impressions necesequal to the distance between any five of the 45 sary to complete a character being selected spaced lines through the symbol while type 10 from a potentially periodically recurrent face 2 is equal in length to the distance be series of single impressions from all of the tween any four of these spaced lines. Type component types. face 3 is separated from type face i by the In the figures which accompany and form distance between any two spaced lines,while 50 a part of this specification and in which type face 2 is separated from type face 3 by like numerals designate corresponding parts the distance between any three spaced lines. throughout: Figure 1 is an enlarged plan Type face 1 is maintained a distance from View of the four component type faces artype face 2 equal to the distance between ranged in the form of a printing telegraph any two spaced lines. 55 printing symbol. Fig. 2 is a plan view of a If now a transmitting tape be perforated 4 a distance of four impression is displaced from th condition of through the predetermined perforations, in

recording tape d moves one tape interval while since the previous imprinting of type face tape units, this second e first impression a dlstance of four tape a complete normal character.

time type face 2 is imprinted with its left extremity abutting the first imprint of type face 4 and its right extremity separated from the last impression of type face 4 one tape interval. The record tap moves one more tape interval While the current changes in value from positive maxitype face potentially cyclic recurrent impressions a predetermined group of impressions.

It will be observed that with my improved design of alphabetical characters, I attain through the regularity ing impulses, a cyclic distribution of the imother. 9o

tical of the letter E right end to a point at vertical of the letter E whereby said half vertical and said middle horizontal are disjoined and said letter E is rendered legible as such.

Signed by me at Toronto, and Province of Ontario, in two Witnesses.

CHARLES G. ASH LE Y.

and extending at its the left of the half county of York the presence of Witnesses WM. J. HERDMAN,

D. S. TOVELL.

O'opies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0'.

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