US853266A - Type-writing machine. - Google Patents

Description

PATENTED MAY 1; 3.967.

L. R. ROBERTS.

TYPE WRITIN1 MACHINE;

APPLICATION FILED SEPT.29.1905.

2 SHEETS-SHEET 1v /NVE/VTOR WITNESSES I a BY H/S ATTORN v W' I PATENTED MAY 14, 1907 L. B. ROBERTS. E WRITING MACHINE. APPLIGATION FILED SEPT.29,1905.

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2 SHEETB-$HBET 2.

. WWW; M MM BY ms ATTORNEY I without lateral bending, from its pivot to usual where alternate short and long bars are same place.

UNITED sTArns PATENT OFFICE.

LYMAN R. ROBERTS, OF DETROIT, MICHIGAN, ASSIGNOR TO UNDERVVOOD TYPEWRITER COMPANY, OF YORK, N. Y., A C PORATIOI\ OF NEW JERSEY.

TYPE-WRITING MACHINE.

Spec fication of Letters Yatent.

rammed May 14,1907.

Application filed September 29, 1905. Sei-ial No- 280.667-

To 11/] u-lm/it it may concern: Be it known that I, LYMAN R. ROBERTS, a

citizen of the United States, residing in Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Type-\Vriting Machines, of which the following is a speciiica-' on. a

This invention relates to the type-actions writing machines, and particularly those the visible writing class, in which the type LI'S are assembled compactly on one side of the printing point.

One object of the invention is to provide long pivot bearings for the type bars, and to this end I use short and long type bars; the short ones pivoted in an are which is immediately within thearc in which the long bars are pivoted: and instead of having the type ends of" the bars in staggering arrangement as employed, I contrive to have the types lie in an even row, as usual in front strike writing machines in which the bars are of uniform length, and thereby the types are brought within the smallest possible compass. I provide individual hangers for the type bars, with improved means i or adjusting the hangers and type bars. The hangers are in the form of strips folded to receive the type bar hubs, and provision is made for taking up the play of the pivots, and also for strengthening the hanger at the pivot end.

A further object is to avoid olisetting the types laterally from the main arms of thetype bars to such an extent asis customaryin front strike writing machines. To this end, in place of the customary double type made in one piece, I employ individual shank types, one for each character, and in each types bar I provide two or more sockets to receive these types. The bar extends directly, or

the socket of the first type, and is bent laterally between the types so as to enable the types on all the bars (which are grouped ra- I dially to the printing point) to print in the A further object of the invention is to im- I prove the touchupon the keys, and to this end I employ sub-levers between the key levers j and type bars, and give the key levers bearings directly upon the sub-levers at points remote from the fulcrums of the latter so as to give an easy start to the keys; and I also extend links from the key levers to the sublevers which ares-die during the first parts of the type strokes, but at the latter parts of said strokes engage the sub-levers at points near the fulcrums of the latter, thereby speeding the type bars to make the impressions and tending to relieve the shock upon the fingers of the operator as the keys are a'rrested. Further obj ect-.. and advantages will hereinafter appear,

In the accompanying drawings, Figure 1 is a sectional elevation taken from front to rear of the type action of a front strike Writing machine made in accordance withmy improvements. F 1g. 2 1s a front view oi an 1mare mounted. Fig. 3 is a plan of the type bars detached from their hangers, only the type bars of the left hand half of the system being shown. Fig. 4 is a perspective view of the type bar and hanger, the latter broken away to illustrate the pivotal adjustment.

Upon the front side of a platen 1 strike lower case and upper case ty es 2 and 3, having shanks inserted in soc ets 4 and 5 of short and long type-bars 6 and 7, which are radially disposed to the printing Joint. The pivots 8 of the short type bars lie in an arc elow the. platen and immediately within or above the arc in which lie the pivots 9 of the long .type bars. As illustrated, the type bars swing through about 90 degrees from normal position to the printing point. An imaginary line 10 drawn through the pivot-s 8 and 9 at Fig. 1 would form an. angle of about 45 degrees to a vertical plane parallel with the front of the platen where the types strike. The ty es 2 on both the long and short type bars, a though moving in different arcs, still lie evenly side by side in the type basket, the same as if the type bars were all of one length, since the pivots 9 are in such relation to the pivots 8 that the arcs 11. and 12 coincide where they touch. the types in normal position. will be understood that if the types move through either more or less than 90 degrees, the line 10 may be shifted accordingly, so that it shall form an angle with said vertical ilane (designated as 13) equal to about hall the angle through whichthe type bar swings. Said plane 13 may form the base oi a right cone having its axis lhcoincidcnt with the printing point, and its sides proved segment upon which the type bars.

IOC

forming an angle of 45 degrees more or less with the base; and it will be seen that the pivots 9 lie at the junction of the base and sides of said cone, While the pivots 8 11s 5 in the sides of the cone. At Fig. 3, which shows the type bars as they would appear it developed from their actual circular arrangement to a position in which their pivots would be all horizontal, it will be seen that [c the types form a substantially even row, as

distinguished from the staggering arrangement of types usual where alternatinglon'g and short bars are employed; the pivots of the lower are being sulliciently far in rear of I s the pivots in the upper arc to effect this result. I

' The type bars are mounted in individual hangers 15 and 16, the former adjustable/foe wardly andbackwardly upon the inner or up er cylindrical face, 17 of a segment 18,

ant ,held whore adjusted by: screws 19, and the latter-adjustably secured by screws 20 upon a conical outer or lower face 21 of said segment; the face 21 being parallel with 10,

25 so that'the hanger 16 may be adjusted obliqucly thereon in a direction to carry the pivot 9 along the line 10 directly to or from thepivot 8, whereby the types on the long bar 7 may be adjusted to strike accurately at the printing point without throwing them alppreciably out of line with the ty es of the s iort type bars. Moreover, it wi be seen that the hangers 16 may be adjusted forwardly and backwardly so as to brine, their t pes when in normal position in aline with t e types on the long type bars, without appreciably varying; the printing positions of the types on the short type bars. Hence all the types may be properly alined both in printing and normal positions, notwithstanding'the use oi alternately long and short type bars. An'y hanger may be removed by simply unscrewing its screw 19 or 20, and another hanger and type-bar sub stitutcd, as will be understood,

it will be soon that the hangers 15 and '16 are formed of strips of sheet metal folded to form loops to receive the screws '19 and 20, said loops rigidly secured near their free ends by rivets 22, which clamp the sides of the loops against interposed blocks .23. The tips of the hangers are thusenabled to support rigidly the typo bars, so that the latter are carried true to th printing point. The

pivots H and 9 oi the type bars are in the iorm oi' concd gudpgeons, which have hearings in screws 24, threaded into holes 25; in

the hangers the screws being, axially perl'orated and coned to reccivesaid gudgeons. The hangers 16 are entirely clear of thc hangers 15 the bars 7 vibrating up between the adjoining hangers lfi. Alloithc hangcrs may be sulliciently wide to enable-the cmployiiicnt of such. long pivots'upon the (5 type bars that accuracy of printing 'is'insured; [the hangers in one are or tier overlapping those in the other, as will be understoo'd"*o1n Fig. 3.

At '5. 3 it will be seen that the pairs of types .2 and 3 lie at various angles to the type bars and that the latter are bent at about the point .26 between the types or type sockets, 27 and 28. The type bars extend directly or straight at Fig. 3 between their pivots and the nearest types 2, these being the lower case types and lnost'fre'quently used, so that when types 2 are printed there is no lateral or torsional strain upon-the type bars and hence good impressions are secured without having the type bars unduly heavy. The 53 necessary lateral bends or crooks in the type bars are very short, as seen at Fig. 3, so-that the upper case types 3 are not undulv offset from the type bars. .By having individual types instead oi the usual double types, the g bend .Or crook can be made at the point 26 (at the junction of the crook with the body of the bar), or between the types, which is iinpracticable where double types are employed."

The type bars are operated by'keys 29. mounted upon the front ends ollevers 30 of the "second order extending rearwardly beneath the type bars andhaving between their ends upwardly extending arms 31 provided at their tips-with lateral pins or projections 32 which bear directly upon suitably curved edges 33 oi bell-cranks 34 having fulcrun'i's" at 35. Upwardly extend ng arms 36 of said bell cranks are connected by adjustable mo links 237 with short arms 38 formed upon the under side oithe type bars and suitablvf hooked to clear the hanger blocks 23. r Itwill be seen at Fig. 1 that the bearing pins 32 are quite remote from the bell-crank iulcrurns 35, m whereby the type bars are easily started in motion. Just inrear of said upwardly e x-' tending arms 31, I connect to the key levers adjustable links 39, which extend up to the bell-cranks I54 and are loosely connected to no the latter between the pins 32 and the fuldrums '35. The-up er end 01 eachlink-is hooked at 40 to catc within a slot 41 formed in the bell-crank, whereby during the initial I orti on of the movement of the latterysaid ink is-idle.

During the last art of the type strokehowever, the link ei 'ecti've and acts upon the bell-crank at a relatively small leverage in comparison with the pin 32; as will be. understood lrom the parts seen i-printing 12o bars pivoted in the upper arc.

platen,a system of type bars pivote to the pivotal axes of the upper type bars; and

the tension of said springs has to be over- 1. In a typewriting machine having a axis substantially coincides with the printing ms for saidlype bars, and a segment having a type bars so as to be effective to return the same to normal position. i

In the form of my invention shown at Fig. 1, if the springs 42 are cast oh, the type bars immediately rise to the printing point, thus showing that very little resistance beyond come by the operator in manipulating the keys, so'that fatigue is avoided and speed of operation is assured.

Having thus described my invention, I claim:

platen, asystem of type bars pivoted to swing against the front side of the platen and each carrying a pair of types; the type bars pivoted in two arcs one immediately above the other, the type bars pivoted in the lower are being longer than the type bars pivoted in the upper are, and the u per type-bar pivots lying in the sides and t e lower typear pivots at the junction of" the sides and base of a cone whose axis substantially c0in cides with the printing point on the platen; the type bars pivoted in the lower are being mounted upon individual hangers which are mounted upon a conical segment of such form that the hangers may be adjusted thereon so as to carry their typebar pivots directly toward the pivotal axes of the type 2. In. a typewriting machine havin a swing against the front side of the platen and each carrying a pair of types, the-type bars pivoted in two arcs oneimmediately above the other, the type bars in the lower are being longer than the type bars in the upper arc, the up or type-bar pivots lying in the sides and t elower ty e-bar pivots at the junction of the sides an base of a cone whose point on the platen; the type bars pivoted m the lower arc'being mounted upon individual hangers which are mounted upon a conical segment of form to permit the adjustment thereon of the lower hangers directly toward the hangers of the upper'arc being adjustable forwardly and backwardly upon said segment.

3. In a typewriting machine, a system of alternating long and short pivoted type bars, the type ends of the long bars lying in substantial alinement with the type ends of the short type bars when in normal positions, and each type-bar carrying a plurality of. types, the types lying at various angles to type bars, individual overlapping hangconical surface where-on the hangers for the long type bars are mounted for adjustment toward and from the apex of the cone,

4. In a front strike 'writing machine havrearwardly striking alternating short and long pivoted type bars, the long type bars pivoted below and a little in rear of the short type bars, the type ends of the long'bars substantially alining with'the type ends of the short type bars when in normal positions, each type bar carrying a plurality of types, all of said type bars provided with hangers, and a segment Whereon said hangers are individually' adjustable, the hangers for the short type bars mounted upon the upper side of said segment, and the lower side of said segment having a,conical form and bearing the hangers for said long type bars; the lastnientioned hangers lying below and in overlapping relation to the hangers for the short type bars.

5. In a typewriting machine, the combination of a system of pivoted type-bars, those in the middle of the system being substan tially straight from end to end, and the remaining bars having crooks at their free ends, the crooks lying at progressively increasing angles to the bodies of the bars from the middle to the sides of the system, and a plurality 'of types mounted independently of one another upon each bar, one type mounted: I

creasing angles to the bodies of the bars from the middle to the sides of the system, and a plurality of types adjustable and detachable independently of one another upo'n eaclrbar, one type mounted upon the tip of the crook, and the other at the junction of the crook with the body of the bar.

7. In a typewriting machine, a system of pivoted type-bars, those in the middle of the to end, and the remaining bars having crooks at their free ends, the crooks lying at progressively increasing angles to the bodies of. the bars from the middle to the sides oi the system, each of said bars formed with a type socket at the tip of the crock, and a separate type'socket at the junction of the crock with t 1e body of the bar.

8. In a typewriting machine,the combination with a system of type bars and a system of keys, of intervening bell cranks and keybearing levers, the latter directly engaging said bell cranks at a relatively great leverage, and links extending from said key levers to said bell cranks and attached to the latter at such points as to transmit motion from the key levers to the bell cranks at a relatively small leverage; said links having losting a platen, the combination of a system of motion connections to the type-bars so as to system beingsubstantially straight from end &

be ineffective (luring thefinitialatgortions of the type-bar strokes. I i 9. In a typewriting machine, the-combination with a system of type bars and a system of keys, or leversoporated by the keys, si-1b levers betweelrsard levers and the type bars, each lever directly engaging its sub-lever at a i relatively great leverage, and links extending from thekey-levers to the sub-levers to act on the latter at a relatively small leverage, said links having lost-motion connections so as to be ineffective during the initial portions of the type-bar strokes.

10. In a typewritingmachine, the combination with a system of type barsand a system of keys, ol levers operated by the keys,

tending from the bell cranks to the type bars, and springs also extending from the bellcranks and connectedto the type bars nearer the, pivots ol' the latter than said 1 and having hearings on the latter forwardly sub-levers between said levers and the type bars, each lever directly engaging its sub- 1 lever, and links extending from the key-levers to the sub-levers: saidlinks engaging said subrlevers at points between the fulcrunis of the latter and said bearings, and having lost-motion connections such that they are inelli'ective at the initial portions of the type bar strokes.

11. In a front strike writing machine, the

eornbinatimi with a system of rearwardly striking type bars, of levers extending rearn'ardly bei'leath the type bars and bearing keys at their forward ends, bellcranks mounted above the key levers, arms rigid with and extending up from said key levers and directly engaging said bell-cranks, links ex- 1 nected to said l1nks,and key-bearing levers tending up from said keys levers and having lostmotion connections to said bell-cranks between the fulcrun'is of the latter and said bearings,-and means connecting said bellwith type bars of key le'vers bell,

of their fulcrums, links extending up from said key-levers in rear of said arms and having lost-motion connections to said cranks between said bearings and fulcrums. and links extendingrearwardly from ,said bell-cranks to the type bars.

14. In a typewriting machine, the combination with rearwardly striking typo bars, of key-bearing levers of the second order beneath said type bars, and bell-cranks having upstanding arms connected to said typebars' said kc -levers having arns ri id there- 7 .J h

with and extending upwardly and engaging said forwardly projecting arn'is of said bell cranks 15. 111 a typewriting machine, the combination with rearwardly striking type bars having pendent short arms, of links extending forwardly from said short arms, bellcranks having upwardly extending arms conol' the second order having upwardly extcnding rigid 1 IRS which engage forwardly. extending arms of said bell-cranks.

' LYMAX R. ROBERTS.

Witnesses:

B. C. S'rIonNEY, C. 1-1. ANDREWS.

Images