US980274A - Type-writing machine. - Google Patents

Description

W. S. IRELAND.

TYPE WRITING MACHINE. APPLICATION rxmzn APB. 531910.

Patented Jan. 3, 1911.

2 SHEETS-SHEET 1.

W. S. IRELAND.

TYPE WRITING MAUHINE.

APPLICATION FILED APR. 5, 1910.

Patented Jan. 3, 1911.

2 Bani-3- 2' WARD S IRELAND. 01 DALLAS, TEXAS.

TYPE-WRITING MACHINE.

Specification of Application tiled April 5,

T 0 all whom it may concern:

licit known that I, Cum S. lmzrlmn, of Dallas, in the ct'iunty of Dallas and State of TCXHSJHUQ invented certain new and useful Im movements in Type-\Vriting Machines; and I do hereby declare the following to be a fulhclear, and exact description of the invention, such as will enable others skilled in the artto which it appertuins to make and use the same.

This invention relates to improvements in typewritin machines such as are particularly adaptabie'for stcnographic writing.

The ob ect of my present invention is to so construct a ty ewriting machine of the character specific that the noise created by the operation of the machine will be reduced to a minimum.

A further object is to construct the writing mechanism in such manner that the. ends of the ty e-bars to which the type.are secured sha 1 be caused to more a veryslight distance in their cotiperation with the laten and still have adequate force applied t ereto tocfi'ect clear impressions u on the paper and without the necessity o applying excessive pressure upon the keys, or depressing them more than a very limited distance.

With these objects in viewthc invention consists in certain novel features of construc tion and combinations of parts as herein after set forth and pointed out in the claims.

In the accom anying drawings, Figure 1 is a longitudina sectional view of a portion of a typewriting machine showing an em; bodiment of my invention. Fig. 2 is a. plan view of the same, and Fig. 3 is a detail view.

1 represents\the frame of the machine, between the sides of which a bar 2 is so cured in the lower intermediate portion of the machine. ,This bar is widened somewhat at itsintermediate portion and provided with a series of parallel fingers 3 forming slots 4 between them for the accommodation of key-bars-fi ---the latter bein provided at. their rear ends with suitable eye or finger buttons 6.-- The fingers 3 of bar 2 are slotted as at 7 to permit t e insertion of a fulcrum rod 8 and the key-bars 5 are provided with slots 9 to receive said fulcrum-bar when the key-bars are inserted in the slot 4.. Each key-bar is rovided at, its pivoted end with an upward y projectlng arm 10 constituting one member of a. to g1e-lever,--the other member of said toggleever being formed by a type bar 11. The type-bars 11 are arranged UNITED STATES PATENT OFFICE.

Lett r Patent- Iutcntctl Jan. 3, 1911.

1910. Serial No. 553.436.

l in a straighthorizontal line. side by side, and are pivotally supported by a fulcrum- 15 provided with a slot 17 to receive a headed pm 18 on the arm 10 whereby the latter is oosely connected with said type-bar. Each' type-bar 11 has rigidly secured to its upper end a ty 19 which, when the parts are at rest. is, is osed a slight distance from a platen 20. his platen is made in the form ofa barprovided at its ends with parallel upon a shaft. 22 disposed between the. sides 0 the frame 1 and the rear ends of these arms normally rest; against the underside mallv in position. A roller 24 is mounted on the shaft'22 to serve as a paper guide and a p or reel 25 is mounted on suitable supports 6,the paper from said rec] being caused to pass upwardly over the edge of of a bar 23 secured to the'fra'me 1 whereby the platen bar 20 will be maintained nor-.

theplatcn bar 20 and then over the guide rod 1:! passing through said typwbars a norm c ployed. The lower end of each type-bar 11 arms 21 pivotally supported a comparatively 76. short distance forwardly of their rear ends roll 24. By pivotally mounting the platen fraine, it may be raised to facilitate the threading of the paper. Guides 27 for an:

inking ribbon 28 are supported by brackets;

art of the framework and this inkia ribon passes between the ape'r on the the platenbar 20 and t ie type.

29 secured to the bar 15 or any convenient;

geof

The.type on the ty e-bars 11 are main-f tained normally a slip t distance fromthl. inking ribbon and the key-bars are retained} and returned to their normal positions by. means of springs 30. each of which is attached at one end to a fixed rod 31 and at the other'cnd with the arm 10 of the kc latter. When a lteydever is depressed, the uni 10 on said lever'cotiperatin' with the longer arm of the type-bar 11 wil cause the upper press the inking ribbon against the paper passing over the platen bar. This slight appreciable sound in its coiiperation with the bar slightly above the pivoted end of t e end of said type-bar to move sutliciently to nomovement of the type will not cause an platen bar 20,.but' the force-whichis ap lied to the type-bar or lever by reason the leverage afforded by the connection of the longer arm of the type-bar or lever with the arm on the key-bar, will be sufficient to cause a proper impression to be made by ressure rather than by a blow. In eliminatmg the hammer action and relying upon pressure to cause the impressions to he made upon the pa er, I am enabled to render the operation 0 the machine practically noiseless, which is a matter of considerable importance in a stenographic typewriting machine.

It will be observed that the type-bars or levers'are arranged in a straight horizontal line with the type permanently secured to their upper ends. \Vithsuch arrangementand construction, proper alinement of the writing will always be maintained withoutnecessity for any adjustment after the parts shall have been once assembled.

An important feature of my improvements is the provision of front-stroke noiseless type-bars so arranged that the writing will appear in a straight line.

Having fully described my invention what 1 claim as new and desire ters-Patent, is,

1. In a typewriting machine, the combination with a, platen, of a series of approximately vertical type-bars liavingty'pe normally disposed comparatively close .to the platen, "each of said type-bars'pivotally .sup-

to secure by .Let-

ported between its ends and adapted toave a sliorttstroke toward the platen. and pivotally mounted key-levers, each having a memberloosely connected with the lower arm of a typebar. 1

2. In a typewriting' machine, the combination with a platen, of a series of approxi mately vertical t "pe-bars or levers, each pivotally S.P rte and provi ed at the end Q its shorter arm with a t pe, andka series of key-levers; each rovide with anupwardly projecting memer loosely connected at its upper end with above its central portion the longer depending aim of the adjacent type-baror lever.

3. In a typewriting machine, the combination with a platen, of a. series of approximately vertical type-bars or levers arran ed in a straight horizontal line and provi ed at their upper ends with type disposed short distances from said platen, means for pivotally supporting said type-bars or levers between their ends, a series of key-levers, each provided with an upwardly projecting .member loosely connected at its upper end with the lower end of the adjacent type-bar or lever. v

4. In a typewriting machine, the combination with a platen, of a series of approximately vertical type-bars or levers provided with type normally disposed short distances from said platen, means pivotally supporting said type-bars or levers at points below their upper ends, a series of key-levers rovidedwith upwardly projecting mem rs loosely connected at their upper ends with the lower ends of the type-barsor levers, 7 means for supporting sa1d'key-levers'adjacentto the juncture of the upwardly projectin membersthe'rewith, 'and springs connecte with the lower ortions of said up-- wardl projecting mem rs and attached to a fixe support.

' 5. In a typewriting machine, the combination with a plurality of type-bars-arranged side by side in a straight -l1ne'and carrying type, of a bar platen provided with arms piv- 30 otally supported between their ends, and

meansen'gaging the free ends of said arms for maintaining the platen normally in a horizontal position in'front of the'type on the type-bars.

In testimony whereof, I have signed this specification in the presence of twosubscribing witnesses.

' WARD S. IRELAND.

- VVitne'sses: 4

' S. G. NOT INGHAM,

G120. F. Downme.

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