US923763A - Type-writing machine. - Google Patents

Description

A. T. BR'G'WN.

TYPE WRITING MACHINE.

APPLICATION FILED IIOV. 8, 190B.

Patented June 1,1909.

VIIIIIIIII/l/II/Id FIE ATTU NEY *nnrrnn STATES PATENT ora or.

ALEXANDER T. BROWN, OF SYRACUSE. NEW YORK.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented June 1, 1909'.

Original application filed March 4, 1904, SerialNo. 196,537. Divided and this application filed November 6, 1908.

. Serial No. 461,396.

To all whom it may concern:

Be it known that I, ALEXANDER T. BROWN, citizen of the United States, and residdent of S racuse, in the county-0f Onondaga and State of New York, have invented certain new and useful Improvements in Type-Writing Machines, of which the fol-' hereinafter appear, my inventionconsists in the features of construction, arrangements of parts and combinations of devices to be hereinafter described and particularly pointed out in the appended claims.

In the accompanying drawings, Figure-l is a side elevation with parts broken away and parts in section of one form of type.

writing machine embodying my invention,

only so much of the typewriting machine being shown as is necessary to illustrate my invention. Fig. 2 1s a diagrammatic side elevation of portions of two of the type actions and the platen. I

The present invention is a division of my 196,537, filed -.M'arch application Serial No.

The frame of the machine: comprises a base 1, corner posts 2 and topplate 3. The

top plate has a dropped, recessed or de-' pressed portion 4 for purposes which will presently appear. Two sets of type bars 5 and 6 are pivoted respectively'at '7 and 8 and are suitably mounted in a segmental arrangement on .an upright type bar segment (not shown). The type bars are each provided with type blocks having two types i and 10, the faces of which are preferably beveled outwardly and downwardly from the center toward the ends of the type block. Each type block is connected by a stem 0 to its type bar, the stem in each instance being situated directly backof the lower case type. Each of the type bars is connected to a pull link 11 which in turn is connected to a bell crank lever 12 suitably connected to a keylever. The type bars are arranged to strike upwardly and rearwardly against the front face of a rotative cylindrical platen 13 asindicated in Fig. 2. The platen is carried by. a platen shaft received in bearing openings in a suitable platen frame comprising end plates connected by a tie rod 16. The platen shaft extends through openings 17 in the end bars 18 of'a carriage. The carriage ,is or may be inethe form of a rectangularframe comprising the end bars 18, a front cross bar 19 and a rear cross bar 20. The front and rear crossbars have opposite faces thereof grooved as indicated at 21 to receive anti-friction balls or rollers 22, which latter are likewise received in oppositely grooved fixed rails 23 and 24 secured to risers 25 and 26 respectively which project from the top plate of the machine.

The platen frame has forwardly extending arms 27 pivoted at their forward ends as at 23 to the endb'ars of the carriage, the pivots 28 being forward of the platen and in the present instance they are positioned so that the printing point is between the axis of the platen and. a line drawn through the pivots 28; By this arrangement the platen may have a limited general up and down motion with the platen frame around the pivots 28 as a center, it being understood that theusual detent (not shown) is carried by the platen frame and cooperates with the platen or the line spacing wheel thereof. The end plates 15 of the platen frame are connected y by a cross bar which is provided with bearlngs for an'a-nti-friction roller 29, the plane of said roller being angularly disposed as shown in Fig. 1 and bearing downwardly andfomvardly against a shift rail which extends from side to side of'the machine and cooperates with the roller 29;at any point in the travel of the carriage. shiftrail 30 is SLIPPOItGClOH arms 31 which project from a rock shaft 32 journaled in depending hangers 33 on the top plate 3. The rock shaft is turned bya substantially horizontally disposed link 34 pivoted at-its rear end as at 35 we erank'arm 3-1. The forward end of the link 34 is piyoted at 36 to the upright arm of a'bell crank lever 37 pivoted at 38 011 a lug or projection 39 on the frame of the machine. The rearwardly extending arm of the. bell crank lever 37 is pivotally connected toone end of a link 40, the lower end of which is pivoted at 41 to a shift lever 42 pivoted at 43 to a bracket 44 secured by a screw 45- to the, frame of the machine. If it be desired't'o mount another shiftkey at the'right hand side of the ma-' The . other side of th lover a? a .clined arrangement of the faces of e rearwardiy extendingairin ll of lever may be pivoted to a link 11 turn at at; to a crank on; a rock shaft 50, the

' o in a bearing in the in a corresponding bearing; the other side of the machine. This reel; may be connector. to the other shift key at the vracltet :hl;

nachine.

From the lore oing descri'otian it will be initlerstoodthat-t drop l in the frame provides an unobstructed space :hn: the lower part of the platen carrier or frz me to afford a travel thereof with. the earring beyond the sides of the machine frame.

it w .i also be observed that while the head or block in planes es 9 and 10 upon each type with their a 'rang.

. \VltlClLlllilClSJii in front of the type faces and an obtuse angle, thes type tacos naive-1t ieiess match the face of platen as indicated in fig. 2 in either position of the platen.

in the o the platen 'atien of the swift mechanism is normally in the position shown .t and in full lines in 9 oil? the where it will cooper with the types 10 on the type When trey l: depressed in ion will be i) through the link id link B l to the elevate the ph'iten frame which pivots thereby in the pivots t ansn'iitted is on the around to e position shown ,in .Fig'. e printing e .on the platen moving from the line Z) to the line 0. At this time the platen is in position to erate with the upper Base types 9 on the ype i s. ii hen pressure on the shift lie-y lever ,s released the parts wi'l be restored. to normal position by ravity.

By reason 01" the peculiar eled or in:- v the types, I am enabled toplaee the types much closer heretofore and thus redue the amount of offset or extentof crankint heretofore necessary in i'nountingx several types upon a bar, and especially those bars, which approach and are at the upper ends of tae segment. For example, it wil be understood that the faces of the types were both in t he same plane. or were inclined reversely to that saown, the types would have to be more widely separated in order to avoid the liaaility of a portion of one ty 'ie printing when another on the ame bar is leaving its impression. ll 'heu, however, the laws: of the types on the same bar are inolinrd bai-im'ardly away from each other i the mannershown. a greater space is provided between the surface of the platen and the type on the bar which is not at the printing point when the other type is in painting position. and hence :1- relatively l? 1 in 4:9 proroeh shaft l 2 in my prior obtained without liability of both types printiir; at the same blow. Thus the close arJan jeaient ot the types on each type blot-l: not only reduces cranking action, thereby avoiding blurring when the oli'set type is printing, but it likewise enables a reduced shifting nmvoment at. the printing; point without liability of a part of one type print ing upon the platen when the. other type on the same bar is printing. By this: construe- [i011 I am also able to employ riomparaiively thick and rigid type bars \vhirh are straight throughouttheir lengths, that is to ray, bars which at'their type end have no lateral or sidewise bends. but ot course my improved types may be used Vllll burs: having such bonds. The straight type bar avoida the liability of the type being; deflected or whipped out of its proper course durinn a rapid or violent. movement of the iype llill' it) the printing position. This delta-t is particularly apparentin a thin sheet metal type bar having a lateral bend at its free end.

, as shown herein, together with a platen ha ing the peculiar shifting motion necessary to cooperate with said types, are claimed application, tlcrial No. 103,898, filed April 21, 1902. The claims in the present case are limited to features not ;-:ho vn in said prio application Various ;*han ges may be made without do parting from the spirit and scope of my invention.

l r hat I claim as new and desire to secure by Letters Patent, is zl. ln a frontstrike typewritinn machine, the combination of a' platen, a support for the platen pivoted in front of the platen,

and key actuated means for shifting said support around the pivots to change the case position of the platen.

2. in a front-strike typm riting machine, the combination of a platen, a platen carrier, parallel arms on which said platen anrricr may be shifted up and down to ehange the case position of the platen, said arms tnrn" on fixed axial centers at their forward ends and swinging up and down at. their rear ends.

3. in a front-strike typmyriting machine, the combinatiouot a platen, a platen carrier, parallel arms on which s id platen carrier may be shifted unand down to change the case position of the platen, said arms turning on fixed axial centers at their "Forward ends and'swinging'up and down at their rear ends, the pivotal centers oi the arms at the forward ends tliereot being l'orwurd ol the platen. I

t. In a trout-strum lypowritiu; machine. the combination of a arriage, a i-ylindrii-al shorter shitt ot' the line of print may be platen, aplaten frame in which aid platen It to -pivoted to said carriage in front of the printing point, and a shift bar co-acting with said platen-carrier below the platen.

6. In a front-strike typewriting machine, the combination of upwardly and rearwardly striking type bars provided each with a plurality of type having their faces in planes which intersect in front or for:

ward of the type faces, a platen, a carriage, a platen frame which is pivoted to the carriage forward of the platen and which carries said platen and causes it to swing with it in themovement of the platen frame around its pivotal connection with the carriage, shift rail situated beneath the platen and effective to move the platen frame on its pivots, and akey at the keyboard operativcly connected with said shift rail.

7. In a front-strike typewriting machine, the combination of upwardly and rearwardly striking type bars provided each with a plurality of type having their faces in planes which intersect in front or forward of the type faces, a platen, a carriage, a platen frame which is pivoted to the can riage forward of the platen and which carries said platen and causes 1t to swing with it in the movement of the platen frame aroundits pivotal connection with the carriage, a shift rail situated beneath the platen and efiective to move thepl'aten frame on its pivots, a link operat-ively connected with said shift rail, a bell crank lever connected with said link, and a shift key operatively connected with said bell crank lever.

8. In a front-strike typewriting machine, the combination of upwardly and rearwardly striking t pe bars provided each with a plurality 0 type having their faces in planes which intersect in front or forward of the type faces, a platen, a carriage, aplaten frame which is pivoted to the carriage forward of the platen and which car ries said platen and causes it to swing with it in the movement of the platen frame around its pivotal connection with the carriage, a shift rail situated beneath the platen and effective to move the platen frame on its pivots, a rock shaft, crank armswhich support said shift rail and which are fixed to said rock shaft, a link connected with one of said crank-- arms, a hell crank lever connected with said link, and a shift key lever operatively connected with said bell crank lever.

Signed at Syracuse, in the county of Oneida a, and State of New York, this 31st day of ctober, A. D. 1908.

ALEXANDER T. BROWN.

Witnesses:

S; DAVIS, O. E. TOMLINSON.

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