US1037981A - Type-writer. - Google Patents

Description

. JLB.v PIGKBTT. TYPE WRITER. I I APPLGATIQN IILED 00T. l2, 1911. 1,037,98 1. Patented sept, 10, 1912.

l 5 SHEETS-SHEET 1.

J. B. PIGKETT;

TYPE WRTER.

APPLIGATION FILED 00T.12,.1911.

1,037,981. Patented Sept. 10, 1912.

l5 SHEETS-SHEET 2.

GIB. Hdez@ TZV @vi/Mmmm J., B.' PIGKETT.`

TYPE WRITER.

APPLIGATION FILED oGT.12,1911.

5 SHEET HB'ET 5. f`

41,037,981." i Patented sepnrlo, 191g. Y

*UmTED sTATEs PATENT OFFICE i JOHN B. PICKETT, or GRAND RAPIDS, MICHIGAN, AssIGNoR or oNE-FoiiRTH To ERNEST M. v IioMAN, ONE-EIGHTH To JOHN W. I'FEIFLER, AND oivIa-Iaiciirrii To sERENUs D. KETGHUM, ALL or EDMORE, MICHIGAN. l

A'IYrE warfare Specication of `lietters Patent.

Application filed October 12, 1911. Serial No. 654,270.

To all whom it may concern:

Be it known that I, JOHN B. PIGKETT,

citizen of the United States, residing at' new and useful Improvements in Type- Viriters, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to typewrit-ing machines and has for an object to generally simplify and reduce the cost of manufacture of devices of this character, the present invention being formed .of approximately 130 parts iny contrast to the 3,000 or more parts forming theordinary typewriting machines now in general use.

A second object 'of the invention is to provide a device of this character having novel type carrying armswhich preferably in nor mal position bear forcibly upon an ink pad, and in operative position bear directly upon the paper -witlfout an intervening ribbon usual in devices of this character.

Vith the above objects in View the invention consists in certain novel details of construction andcombination of parts herein-` after fully described and claimed, it vbeing understood that variousmodifications may be made in the minor details of construction withinthe scope of the appended claims.

ln the accompanying drawings forming part of this specification :#Figure 1 is a side elevation ofthe typewriting machine. Fig. 2 is a vertical longitudinaly sectional view through the machine. Fig. 3 is ai' horizontal llongitudinal sectional view taken on the 'line Referring now to the drawings in which l like characters of reference designate similar parts, the typewriting machine is shown to comprise a hollow open front base or frame formed. of a bottom Wall 10, from the side edges of which rise side walls 11, land from the rear edge of which rises an arcuate rear Patented sept. 1o., 1912.

wall 12, these Walls being connected at their i top edges by a top wall 13.

Arranged within the casing is an are frame llt, the same conforming to thecurvature of the rear wall andterminating short of the top wall in an outstanding flange 15 whichis provided with sp'aced'slots 16. Pivotally secured in the slots are a plurality of substantiallyangle levers 17, these levers being ,all of approximately the same length. One leg ofv each lever extends downwardly `along the inner periphery of the 'arc frame. and the opposite leg extends through and projects slightly beyond the related slot i6. f

Any preferred means of pivotally mounting the levers may be employed the connection being in the present instance made by a wire 18 passed through suitable registering openings formed in the lever legs and arc frame. 1

Pivot-ally connected-to the lower end of each depending lever leg is a type carrying arm 19, the same being equipped at its eX- t-remit-y with spaced type 20. An arcuate inkv pad 21 is IiXed at its opposite ends to .the sides of the frame, and the type are made to bear forcibly uponthis pad through .ther

instrumentality of elbow. joint-s 21 at the meetings of the levers 17 and type carrying cured to the side frame, this guide bar being formed from an arcuate bar having its lower edge slit as shown at 23 to receive the type carrying arms, the latter bearing against the innery walls of t ie slits and being guided thereby in their movement whenrocked through the instrumentality of the levers17 as will be presently described. It will be noted, and this feature lis of importance,

that the path of the type from restto printingA position is a' peculiar curve as. shown in dotted lines in Fig. 2. This path enables the type after printing to rise vertically from the paper, thereby avoiding smearing. The anglelevers and the type carrying arms are shaped and proportioned to attain this end.

The operating keys are Xarranged in three concentric rows,`and each comprises a head 24, and a stem 25, the stems' of the middle row of ke s are straight and bear with their lower en s againstI the projecting ends of their related levers 17. The stems of the so i, arms 19. A guide bar 22 is terminally seinner and outermost row of keys. are formed at an angle as :shown at 26, andabear with their extremity against the projecting `ends of the related levers 17. Upondepression of any paiticularkey, the related lever-17 is rocked on its pivot, and the related type carrying arm moved forwardly through an arc. The type carried by the arm'is impinged against the paper on the platen during depressionhof the key. Upon release of the key, by virtue ofthe majo-r port-ion of the rel-ated lever 17 being disposed below the pivot of the lever, the lever will 'be returned "bygravity to its initial position, thereby 34 of a compression roller 35' between which returning the keyand the type carrying arm to their initial position.

The carriage comprises a bottom plate 27 from the. opposite corners of which rise postsI 28, the posts on' eacli-. `ide of the plate being connected by cross bars 29. Aliiiing slots 30 are formed in the cross bars and receive the gudgeons 31 of a platen 32. A second pair of alining sl-ots 33 are formed in the cross bars and receive the gudgeons and the platen the slieet'of paper 36 is engaged, an upwardly curving guide 37 being- 'secured to the bottom plate and terminating adjacent to the meetings of the platen and compression roller to guide the paper in its p-osition between the platen` and compression roller. This guide furthermore forms a stop for limiting sliding 'movement of the platen in its' slots 3l, the purpose of which movement will presently appear. Terminally secured to the cross bars 29 and to the ends of the compression roller gudgeons are heli- "cal springs" 38, these springs serving to hold the compression roller in snug engagement with'the platen, and` to hold boththecomression roller and laten gudgeons at the orward ends of their slots. By manually forcing the platen rearwardly until the gudofeonsof the platen engage the rear walls of tlieir slots, the platen will be moved into .such a position that the i'earmost or capital letter types on the type carrying arms will be brought into engagement with the paper on the plates upon depression of the operating keys. It will thus be noted that the shift.

,key of an ordinary typewriter is dispensed with.

Keyed to the platen gudgedns are ratchet.

free end with an upwardly bowed upon the bottom wall of theA frame and supporting thecarriage for sliding movementon thel frame. A rod 43 is fixed to the base .pla-te of the carriage and wo-rks in a groove 44 formed in the base of the machine, this rod directinfr the sliding movement of the carriage. The Aescapeineiit for actuating the carriage, consists of a straight rack bar 45 which is xedrto the base plate of the carriagev and arranged to one side of the rack `bar is a leaf spring 46, this leaf spring"be` ing secured at one end to the bot-tom wall of the frame, and being formed adjacent to its ortion 47 the tip `endof which engages with the teeth of the rack. Centrally and pivotally Ymounted upon a series off preferably four posts 48 are a series of four tilting levers49-4 The levers are arranged in the form of a seniicircle in the rear of the arc frame 14. An arc rod 50 is arranged to underlie the .projecting ends of the angle levers 17, and

is provided with radial outwardly extending fingers 51, preferably three in` number as shown iu Fig. 3. Two of the'ingers are arranged at the ends of the rod and the third centrally disposed upon the rod. The terminal fingers of the rod are provided with upstanding stems 52 which extend outwardly through openings in the frame top wall and .are connected by a cross strip 53 which forms a letter and word spacing key, One

lo-f the levers 49 bears terminally against the bowed portion of the leaf spring. 46 and it is now clear that. on. depression of the spacindkev, that the rod 50 lwill be de? presse thereby depressing the said lever 48, and flattening,out the' bowed portion of theleafspring thereby advancing the rack and carriage onestep. Uponrelease of theA spacing key, thebalaiiced levers 49 will all return to their normal positions, after having been depressed bythe ,rod 50 upon its depression, and will elevate the rod 50 thereby permitting the bowed portion o f the spring to return t-o its normalposition and operatively engage tlie rack for advancing the'latter one step upon the neizt depression of the spacing key.

For releasing the 'esc-a ement so that the carriage may be ret-urne to its initial position after having traveled to its limit of movement in vone direction, a substantially Z-shfiped key 54 is lslidingly fitted in an 11p-standing eye 55 arranged upon the frame bottom wall, and bears with its extremity against the underneath face of the spring bowed port-ion, the top edge of said extrenr ity being inclined upwardly as shown at 56 and forming a cani surface upon which, when the key is manually pushed in, the bowed portion will ride upwardly and the spring be released from the rack. -In this position of the parts, the carriage maybe manually shoved back to its initial position.

What is claimed iszl.' ln a ypewriting machine, the'cOInbi-V-` nation with a,` frame, of e plurality o-f'lteys, angle levers, a supporting `frame' for. said levers, .each angle lever comprisinga sub--y stantially horizontal arm and a vertiealleg said substantially horizontal arm pivotally connected to saidv supporting .frame intermediate its ends, typecarrying-y bars `pivotally connected tothe lower ends of the ver# tical legs of said angle levers, and guiding` bar, said type-carrying `bars, passing through said guiding bar.,

directly to the 'opposite'end of said levers,y

and `guiding means for said type bars Y 3. In a ypewriting machine, the fconibif nationwith a stationary support, of a Alever projecting on opposite sides 'of and being pivotally. connected to saidsupport, said lever provided with @downwardly extending leg, a verticely slidable operating vkey pivotally connect-e at its lower end to Jche upper outer project-ing end `of saidl lever,

I' a typeearrying lber pivotally connected a-t ils inner end directly to che lower endfoi'- 'the legof said lever.,v

of its arm, a key `directly 'connected to the" arm et' one sideof` the support, andytype-l carrying means movably connected tov vthe leg of said lever.y

5. Inajtypevvriing machine, the combi# ntionof a main frame, a plurality ofkeys,v a ISupportingframe having a plurality 4of' notches formed upon chetop edgexthereof, -angle -levers pivot-ally mounted in saidnotclies of the'supporting:frame and ha V` 'ing depending! .port-ions, afguide member `v.Carried by saidina'in frame, operating keys -.p1vo;ed directly to the outer ends of the levers, and vQfp-carry]ng 'inea-ns movable.

uponsaid guidingelement and'dlrectly conneared-near theirfinilerv ends to thelower ends of the levers.

In testinionywhereof Phereunto affix signature 1n-'presence `of twojwtnesses.. y

H. H, DQLANGEREIS, i' M. SHOER.

Copies of this Apatient may be` ob'tanedfor ve'eents each, by addressing* the Cpmmissionefo'f Patents, Washington, 1). C,

.435 nation Wit-h 'fay support, of aleverprovided

Images