US1755514A - Typewriter-escapement mechanism - Google Patents

Description

April 22, 1930. c. K. RAINEY 1,755,514

TYPEWRITER ES CAPEMENT MECHANI SM Filed July 19, 1927 5 Sheets-Sheet l atto/amm April 22, 1930. c. K. RAINEY TYPEWRITER ESCAPEMENT' MEGHANISM Filed July 19, 1927 3 Sheets-Sheet 2 April '22 1930. K. RAINEY 1,755,514

TYPEWRITER ESCAPEMENT ECHANISM Filed July 19, 1927 3 Sheets-Sheet 3 Q CMM..

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Patented Apr. 22, 1930 l. Y Y 1,755,514.

CLIFTQN K. 'Remain or KOXVILLE, 'T'NNESS i TYrEWnrrnn-nscnrniuin MECHANISM Application inea .iuiy 19, 192th serial N'o. 'ee'geia` This invention relates to a carriage escapecause of the disturbing of their delicate adment mechanism for typeWritin-g, tabulating j-ustnient. and other forms of recording machines.' y The present invention contempla-tes a f The primary 'object of the invention is to broad departure from the old rockerin'otion 5 provide an improved escapenient of rotary and the useof a rotary spacing element car- 55 type which permits a swift and uninterrupted ry-ing a plurality `of "dogsnslidably movable movement Iof the carriage incident to the When in Working position upon the operation successive formation of the letters or charof a key to permit the escape of one tooth actors. of the escapem'ent Wheel. Any number of A1;) .Another object is to provide a rotary es; these dogs may be employed upon the rotary G0 capement mechanism of such construction as spacing element, among Which the 'Wear is distopositively stop the carriage at the completribut-ed so that the life of this portion of the tli'on of one letter or character space, thus obmachine is proportionately increased. These via-ting the possibility of the carriage 4-movdogs 'are niountedso as to permit the escaper1.5 ing morethan'one space during the single 'opment Wheel to Vfeed Without spring resistance 65 eration of a key lever. therefrom `during a feednfiotion, and Without Still another object is to provide an escapebreak or interruption in its feed motion, ment mechanism which allovvs the carriage Whereby the speecljof the escapement motion to move oneach feed step Without resistance is greatly increased..

V2o inhibiting its rapid feed c movement, and In the accompanying drawings illustrating' 70 sinoothlyor without tremors or breaks such as the inven-tfi'onf'- v l v are caused, for example, in feed mechanisms Figure 1 is a rear elevation ofthe frame of double dog type incident tothe transi- Of a typewllg Sll'o'winfg the aPPlicatiOIlOf tional movement of a tooth of the escapement my invention thereto, parts ofthe universal 25 Wheel from dog to dog, or to single dog esbar mounting being omitted for saire of clearcap'ement mechanisms in which there is a .pe- HQSS 0f ifllUStIa-t'on. Y riod of dwell in the escapeinent'act-ion. Figure 2 is Aa vertical front-tofrear section Still another objectof the invention is to through the machin-e showing only such parts provid-e a construction i'n Which the entire a? are DcCcSSnrytoadisclosure of the-invenao releasing step occurs during the movement H011. f i of a type bar iii one direction, preferably 'on Fgule is ak sectional view similar t0 Figthe return movement of said bar, so that the 1116 2 thTOUgh the escapemnt mechanism, carriage will be held absolutely lirm and sta- Such Sectlon belng taken on line 3 3 ofFigtionaiy during the ensuiii'glirinting motion l'l'e c f i g 35 of the 'Same `or:5i-notk@ tympan Figure 4 is fa sectional plan view of 'they S5 Heretofore thevdesired feed movement jof Spacing Wheel" .aindcaSSOCmed vParts "01" the the carriage has been generally attained in escaljement .mechmsln- .i if machines iii use by lfll'elans 'of the ordinar es- Figure .5 13a Vleiw 1H end eleva'tlon'of the capelme'nt 'Wheel and `a rocker y'arm carrying Spmg Weflvand feed Iiittchegt' .1 9 one ortWo dogs fixed 'or'pivotech which reure lgure 1S a Sec l10n on '11166-6 o g1g" u Oilcaitdarssvth patloof t Figure 7 is apcrspective view of the sup- W dei a a er ut eey .S D .C e e e e portingbrac-ket and the parts 'of the univer-` same "and consequently the carriage connected sul ybm, mounted thereon. y n

45 therewith. In these formsof escapement` the y Figure 8( is .aperspectve View of Oneofth'@ 95 shock incident to the stopping of the carriage feed dogg at each letter* Space is delivered. UPU either Referring4 to the drawings@represents thc a single dog or one of a pair, and such exces- 50p plate 0f the Stationary .famme of a typesive usev of these par-ts 'causes them to A'loe Writer, and -2l the shaft carrying the usual 50 quickly Worn and their action inaccurate beescapement W'lieel. The escapeirent wheel '100 is controlled by a spacing wheel 4, mounted upon a shaft 5, which also carries the spacing Wheel feed ratchet 6. The shaft 5 is fitted to turn upon adjustable bearing members 7 mounted in a supporting bracket 8 secured to the underside of the top plate of the machine, said shaft 5 being arranged transversely of the machine so that the spacing wheel 4 and its ratchet 6 turn in a direction at right angles to the direction of rotation of the escapement Wheel 3. Y

The feed wheel 4 is provided at opposite sides of its periphery with circumferential fianges 9, forming an intervening annular channel, in which are arranged an annular series of radially projecting dogs 10, each dog 1() being mounted upon a flat body portion, bar or shank 11 mounted to slide across the circumference ofthe wheel and through alined guide openings .12 in the fianges 9. These dogs are normally arranged in working position at one side .of the circumferential center of the channel in the spacing wheel, and said dogs are adapted to successively engage and release one tooth of the escapement wheel 3 upon each operation of a key lever 13 of the set of key levers of the machine, one of which is shown in connection with a type bar 14 actuated thereby. As shown particularly in Figures 1, 4 and 6, the dogs 10 normally abut against the flange 9 facing the left hand side of the machine, as viewed from the front of the machine, and each dog is movable across the channel of the feed wheel and'into engagement with the flange 9 at the right hand side of the channel for escapement wheel'spacing, stopping and releasing actions. Figure 1 shows one of the dogs which has been shifted by a tooth of the escapement wheel to stop position, whereby the escapement wheel and carriage are firmly held from feed movement. When the spacing wheel is turned a distance of a dog for the next feed action, the dog which is in stopping position moves out of engagement with the tooth Iof the wheel 3 which iig-engages and the following dog comes into alinement with the neXt adjacent tooth of the escapement wheel and is shifted thereby laterally of the face of the wheel into stopping position, permitting the escapement wheel to turn a'distance of one tooth for a letter or character space feed action. l

Arranged at that side of the feed wheel toward which the dogs move for an escapement action is a controlling cam 15 Which is xed from rotation and suitably secured to and supported from the bracket 8.V This cam extends entirely around the adjacent side of the spacing lwheel concentric withthe shaft 5 and bears against the side of said wheel except at one point where it is provided with an offset porti-on 16. The body portion of this cam lying in contact with the side of the feed wheel is thus arranged to provide a retracting and locking portion to engage the adjacent ends of the bars or shanks 11 and hold the dogs in normal position until, through the rotation of the spacing Wheel, the dogs come into alinement with the teeth of the escapement wheel, at which point the offset portion 16 is arranged so as to permit shifting of the dogs to the stop position and upon a releasing action to return each dog to normal position in which it is locked by the body portion. By the construction described it will be seen that the dogs are normally retained against that flange 9 of the spacing wheel located adjacent the advancing tooth of the escapement wheel by the body portion of the cam, and that a dog in position to be moved forward for an escapement action is brought int-o alinement with the advancing tooth of the escapement wheel by a feed movement of the feed wheel, at which time the dog so fed up comes opposite the cam portion of the cam member, allowing said dog to be slid across the face of the Spacing wheel in the direction of said cam member to permitthe escapement wheel to turn the distance of one tooth and to then lock the escapement wheel against further movement and' until the spacing wheel is again turned. In this escapement action it will be obvious that the feed movement of the escapement wheel is continuous or without break 0r interruption, and without material resistance, since the controlling dog is freely slidable across the face of the spacing wheel, Whereby a rapid escapement action free from jerks, jars or tremors is obtained.

The spacing wheel feed ratchet 6 is intermittently operated by a spring-pressed push pawl 17 mounted upon an arm 18 of the unij f versal bar 19 which may be of usual construction and operated in one direction by the type bars 14 to shift the dog` or pawl 17 rearwardly to starting position for a feed motion, and the bar 19 may be operated in the opposite direction on its feed motion by a spring or springs 20, in which direction of movement the dog or pawl 17 engages and turns the ratchet wheel 6 a distance'of one tooth for a corresponding feed motion of the feed wheel. An adjustable stop 21 is provided for Vlimiting the backward movement of the universal bar 19 under the action of the type bars Q0, and a suitable stop 22 is provided for limiting the upward movement of the nose of the pawl 17 so that on the return movement of the universal bar 19 the pawl will positively engage a tooth of the wheel 6 and turn said wheel and so that at the end of such movement of the bar 19 the pawl will lock the spacing wheel against movement. It will be observed that the action is such that the feed ratchet and spacing wheel will be operated for an escapement action solely in one direction of mo- 1i, vos, are:

tionof a type" Ibai 114,-. which mfaylae, if 4cle-f ingpo tion. :lepre however, toy yeiiip'loy the' arrangement :shown the :present instanjc in Wlii'ch the faction is rsuch that the teecl 1 ot'ion occurs :solely and Wholly during tween .its ting' position and v1rori'nalf 'or rctracftecl-}o'siti'o1i, so 'that -cln g the printing Amotion fot" the the carriage will be firmly held against motion While the printa'etion is taking: place. The .universal bar ll9' maybe operatively monntccl upon the' supporting bracket 8,. as :shown in Figure V7.,- a known type let' construction is rth the 1exc'e`} t`i`on' offlthe' provision' of the anni Y1'8 ariel' the push typ'eof ratchet feed pawl 17. .'lfhe improved escapement mechanlismv .may otherwise be usedV int 1coi'in-e'ctiofn with the universal bar' and 'escapeinent Wheel ot any conventional typewriter esca-pement mechanism, by the sib'stitlrtion of .my -improved .rotary spacing. Wheel and enacting parts for the reciprocating clogs Vconimonl-y employed. 1

Y 'Elie aclvanta-ges'of my construction .are obvious; The 'rotary spacing: wheel', provided' with a large nf nib'er fof dogs; upon Whichtlie weer is eq 1y distribue-eel, .reduces weer andi tearlupon the clogs' et the eeeapemf nt to eseapement meramente' in which ai s ,glo reciprofeatory dog: or a pair of reeiprocatory clogs are emplofye'cl for -the purpose. Springs for controlling the lclogs 'entirely dirsp'ensecl with, so that upon engagement of a tooth' or the 'escape-ment wheel witha deg for an escapenrent action; no resistance to the movement of thefeseapemjent wheel 'er car-- riego is set up.,`t=1ius enablinfgfa quickescapement motion lloe ottainedl.- Rapidity Iot action, Without irregularities of motion,l are' also se'cnr'ecllto 'tlreliliigf est clegreeiby the provision of.' a" .singleinovernent escapan-'ent ae'- tio-n, in Whifc'l'u' the toot-'lr of the -esc'apement wil-reel eiigage-z'sy but a single deg which moves in a Asii'igle direction f' -ly to permit the 'es'- capement Wheel-to'tnirn -iage-'feecl movement. strong' de able type of eseap'ement mechanism is thus provide-'d which isl moeliless liable: to get ont et orcler tiran-those of the type heretofore used, ancliv'lii'cllil at the same time permits ofa faster and smoother eseapeioentniotion or the' b of alnenient in the f writiirgaetien by irregularitiesforj action or eseapeineiits ot reciprocatory clog typein .comi-mo use invention overcomes this obje'c as' fore the' type bar moves' to' full print-V escapement mechanism' .to operate for a cairriage fe'ecl motion as-j .tast as the typing: mech-'f anisni can loe either manually for, mechanically operated.y Y, f f

As shown, the bars -orslianks their guide' openings' 1Q are of angular or .noncircular form', whereby the dogs are from tilting.' and' are-accurately gni'f'cleel 4se that smooth and easily slid-ing' motion is obta-ined 'anictthe yclogs V:snppjorteel lirm'ly whereby the clogs when iacljnstecl to stop pos sition will hold the escapenrent andwcarriage seci'ire'ly and solid-'ly against n-rovenient. Since the `clogs areV moved from stop toji it'ia'l position by means independent of ytlrecar-z t riage, and are free to'be moved' by the escape-` m'ent Wheel in thel opposite direction Without the necessity of overcoming; the resistance of springs or other devices, an exceedingly rrapidI escapement y action is `obtained and one' in Which, 'at thel same time, cloesnot- 'caerse i'r-^ regular spacing yof .Written let-ters' or charactors.A

HavingA thus fully described my invention", I claim'c; Y f r 1. In a spacing mechanism for typewriti'n-g and like machines, an escapfenrent Wheei, an intermittently operable spacing'` Wheel mounted' to rotate on 'anf a-Xis arranged transversely of the machine, dogs slidable tran-sversely of thev face' of' the spacing Wheel' ancl aclaptecl to be successively brought by the' rotation ofv the spacingV Wheel into and out of the path ot' successive teeth of'tlreescapement Wheel anclto'besliifted by the teeth of vtlre latter laterally on sai-d 'spac- Wh'eel to' stop positions and means for inaintainingsaid dogs in initial position and releasilirgv them for' shifting. motion to stop position and thereafter returning itlrem tof initial position 2.- In a spacing mechanism',- an escapement Wheel',/-a-n= intermittently operable' spacing', Whe'erlgsliclfable clogs on the spacing- Wheel adapted to be' successively brought the A rotation 'of the' spacing Wheel into andout or the path of successive teethof the 'escapenent .Wheel and to be shiiftetl lby the-teeth of the' latter laterally on saiclspafcing Wheel to stop posi-tion, and controlling' 'meansmfounted .inlclfependently of the" Wheel for :m-aintaini-ngi;E saifcl `clogs in initial position ancl'r'eleasing; them for shitting motion to stop positioni and' thereafter returning: them to' initial posi tion; t

3. In a spacing me'chanifs'nr,w an' escapement`- Wheel, an intermittently operable spacing..

Wheel, slidabl'e clogs -on the spacing Wlreei adapted tof be* sc'cessivcly brought `by the rotation of the spacingj Wheel into an'cl ont of the path of successive' teeth or" theescap'em'ent Wheel and to be shifted by theteeth o the-latterlaterally on-fsaietspaoieg Wheelto stopp'osi:

Homan-d a cam @levi-iceytor maintaining saifcli clogsv m initial positlon and releasing thein ceI v for shifting motion to stop position and thereafter returning them to initial position.

4. In a spacing mechanism, an escapement Wheel, an intermittently operable spacing Wheel, slidable dogson the spacing Wheel adapted to besuccessively brought by the rotation of the spacing Wheel into and out of the path of successive teeth of the escapement Wheel and to be shifted by the teeth of the latter laterally on said spacing Wheel to stop position, and a 4stationary cam device supported independently of the spacing Wheel and operative for maintaining said dogs in initial position and releasing them for shifting motion to stop position and thereafter returning them to initial position.

5. In a spacing mechanism, an escapement Wheel, an intermittently operable spacing Wheel, slidable dogs on the spacing` Wheel adapted to be successively brought by the rotation'of the spacing Wheel into and out of the path of successive teeth ofthe escapement Wheel and to be shifted by the teeth of the latter laterally on said spacing Wheel to stop position, means for maintaining said dogs in iritial position and releasing them for shifting motion to stop position and thereafter returning them to initial position, and Vkey lever actuated ratchet means operative during the retraction of the key lever after a printing action for turning the spacing Wheel for a spacingl action in Which the controlling dog is shifted during such motion of said key lever. i

6. In a spacing mechanism, an escapement Wheel, an intermittently operable spacing Wheel, slidable dogs on the spacing Wheel adapted to be successively brought by the rotation of the spacing Wheel into and out of the path of successive teeth of the escapement Wheel and to be shifted by the teeth of the latter laterally on said spacing Wheel to stop position, means for maintaining said dogs in initial position and releasing them for shifting motion to stop position and thereafter returning them to initial position, a ratchet Wheel connected to the spacing Wheel, a push pawl for actuating said ratchet Wheel, means for actuating the push paivl, and means engageable With the pavvl at the end of its feed motion for holding it in engagement with the tooth of the ratchet wheel engaged thereby.

-71 In a spacing mechanism, an escapement Wheel, a rotary spacing Wheel rotative on an axis at right angles to the axis of the escapement Wheel and provided with transverse guides in its periphery, an annular series of dogs upon the periphery of the spacing Wheel arranged so as to be successively brought by intermittent motions of the spacing Wheel into the path of successive teeth of the escapement Wheel, said dogs beingV slidably mounted in saidguides to be shifted by the teeth of the escapement Wheel for an escape.-

ment action, and means for moving thel shifted dogs back to initial position.

8. In an escapement mechanism for type- Writing and like machines, an escapement Wheel, an intermittently operable spacing Wheel mounted to rotate on an axis arranged transversely of the machine, dogs individually slidable transversely of the face of the spacing Wheel into and outrof the path of successive teeth of the escapement Wheel so as to be shifted by the teeth of the latter laterally on saidspacing Wheel to stop position, a universal bar, and means actuated by said bar for imparting feed motion to the spacing Wheel.

9. In an escapement mechanism for type- Writing and like machines, an escapement Wheel, an intermittently operable spacing Wheel mounted to rotate on an axis arranged transversely of the machine, dogs individually slidable transversely of the face of the spacing Wheel into and out of the path of successive teeth of thev escapement Wheel so as to be shifted by the teethof the latterI laterally on said spacing Wheel to stop position, a universal bar, and a push paWl actuated by said bar for imparting feed motion to the s )acing Wheel.

10. In a spacing mechanism for typewriting and like machines, an escapement Wheel, .3

an intermittently operable spacing Wheel mounted to rotate on an axis arranged transversely of the machine, dogs slidable transversely of the face of the spacing Wheel and adapted to be successively brought by the rotation of the spacing Wheel into and out of the path of successive teeth of the escapement Wheel and to be shifted by the teeth of the latter laterally on said spacing wheel to stop position, means for maintaining said 7 .A

dogs in initial position andreleasing them for shifting motion to stop position and thereafter returning them to initial position, a universal bar, and means actuated by said bar for imparting feed motion to the spacing J Wheel.

1l. In a spacing mechanism for typewriting and like machines, an escapement Wheel, an intermittently operable spacing Wheel mounted to rotate on an axis arranged transversely of the machine, dogs slidable transversely of the face of the spacing Wheel and adapted to be successively brought by the rotation of the spacing Wheel into and out of the path ofsuccessive teeth of theV escapement Wheel and tobe shifted by the teeth of the latter laterally on said spacing Wheel to stop position, means for maintaining said dogs in initial position and releasing them for shifting motion to stop position `and thereafter returning them to initial position, a universal bar, and a push pawl actuated by said bar for imparting feed motion to the spacing Wheel.

12. In an escapement mechanism, an eslili) capement Wheel, a spacing Wheel, dogs on the spacing Wheel slidably shiftable by the teeth of the escapement Wheel, and a cam device for .retracting thel dogs.

13. In an escapementlmechanism, an escapement Wheel, a channeled spacing Wheel having the side Walls of its channel provided with guide openings, dogs mounted in the channel of the spacing Wheel for lateral movement therein in one direction by the escapement Wheel, said dogs having guide members slidably engaging said guide openings, and means for sliding the dogs laterally in the opposite direction.

14. In a spacing mechanism, an escapement Wheel, an intermittently operable spacing Wheel, slidable dogs on the spacing Wheel adapted to be successively brought by the rotation of the spacing Wheel into and out of the path of successive teeth of the escapement Wheel and to be shifted by the teeth of thelatter laterally on said spacing Wheel to stop position, means for maintaining said dogs in initial position and releasing them for shifting motion to stop position and thereafter returning them to initial position, key actuated means comprising a ratchet Wheel and a pavvl, the latter operative on the former in one direction of motion of the key lever for turning the spacing Wheel for a spacing action in Which the controlling dog is shifted during such motion of Said key lever, and a stop acting at the end of the feed motion for holding the pawl in engagement With the tooth of the ratchet Wheel engaged thereby.

l5. In a spacing mechanism, an escapement Wheel, an intermittently operable spacing Wheel, slidable dogs on the spacing Wheel adapted to be successively brought by the rotation of the spacing Wheel into and out of the path of successive teeth of the escapement wheel and to be shifted by the teeth of the latter laterally on said spacing Wheel to stop position, means for maintaining said dogs in initial position and releasing them for shifting motion to stop position and thereafter returning them to initial position, a ratchet wheel connected to the spacing Wheel, a universal bar, and a push pa-Wl actuated by the bar and movable over the teeth of the lratchet wheel in one direction of motion of said bar and engageable with the tooth of the ratchet Wheel in the other direction of movement of said bar to turn the Wheel for a spacing Wheel feed motion.

In testimony whereof I ai'liX my signature.

CLIFTON K. RAINEY.

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