US1264589A - Type-writing machine. - Google Patents

Description

N. H. `ANDERS0N,

TYPE WRITING MACHINE.

A-PPLICATION FILED AUGI 6, I9I3I.\` l v Patented Apr. 30, 1918.

WW1/wonen; I

N. H. ANDERSON. TYPE WRlTlNG'MACHlNE l'APPLICATION FILED AUG.5. 1913.

Patented Apr. 30,1918.

2 SHEETS-SHEET 2.

Cil

nine n. Eason,

0F MIFDLETOWN, CONNECTICUT, ASSIGNOR T0 THE NOISELESS CONNECTICUT.

Lantana.

` To Il :elw/n it may concern:

lle. it known that. llj` 'N1-is H. Axnsnsox,

a citizen of thc-linited States, residing at ,and Stateot' -(`oi inecticut, havil invented certain newand useful Improvements in `'lllype-ll'riting Machines. of which the following is a full. clear, and exact description', l

such as will enable others skilled in the art lto which it appertains to make and usevthe same. I .4

'lhisinvention relates to typewriting machines. and with regard to certain more specific features'thereof, to that mechanism or part of a typewriting machine known to those familiar with the art as back-spacing mechanism.

. lUne. of the objects of the present invention is to provide a simple and practicalv back-spacing mechanism which will be ellicient in use and noiselessin operation. Another object is to provide a device of the above character which will bev cheap to manufacture and easy to assemble'v and in stall. Arfur'ther ob'ect is to provide a device of the above character permitting of ready adjustmentuiider varying conditions and adapted tofrelieve strain upon movable parts when movementof' other parts connected therewith is positively' prevented. Other objects will be in art obvious and in 'part pointed out hereina ter.

'lhe invention accordingly consists in the features 'of construction, combinations of elements and arrangement of parts which will be exemplified in the construction hereinafter set forth, and the scope of the ap 1i-` cation 'of which will be indicated in the ollowing claims.

lin the accompanying drawings, in which is illustrated one of the various possible embodiments of the several features of the'invention,

Figure 1 is a side elevation of the backspacing mechanism and such associated and (zo-acting arts as appeal' necessary to Sulliciently 1'1 ustrate one embodimentof the `present invention;

Fig. 2 is a plan view thereof ;r

Fig. 3 is a detail view showing the movement of the back-spacing dog; and

Fig. l is an end elevation, partly in sec- ,.tion, of .a portion kof theamechanism shown in Fig. 2

Specification of Letters Pat-ent.` i Mlgiltinttetll Alpi'. lill, lill vl Application tiled august 6, 1913. Serial No. 783,333. 'I' i TYPE-WRITING MACHINE.

Referring now in .detail to the drawings.. I

.and more particularly to Figs.' 1 and 2,

is denoted l, v-1 and.'2 opposite #si-dc; wall por-` tions otI the frame ot'. the nmchine adapted to be connectedby a transverse'supporting' member from which is suspended a U- shaped escapement bracket/4. vThis: mem ber l is adapted to support a rocker member 5 carrying escapement mechanism'ti ot" :in v desired form` but preferabl') one of theseveral forms of Noiselessl escapemeut mechanism. such as shown. for example. in palent to Kidder and Spousel'. Serial No. 871,281, issued November 19. 1210i'. The capement mechanism is. as iswell known. designed to eo-act with a carriagewolurolling rack, such as an escapemeut wheel T.

connected with the carriage (not herein there 1 shown), for controlling-- its normal l etter Vspace movement.V

The back-spacing mechanism now to be, described is also adapted to co-aetthrough a dog 9 directly with the same-escapement Wheel T, t rotate the wheel in the opposite direction gainst the action of the carriage/- drive spring for returning the carriage to a former letter printing position. in `order that a correction or reprintingr ol' a character may be more convenienttv l'gerformed. There are` otl Nurse. other objects and 'advantages obviousl to those familiar with the art and the practical operation ot' a typewriting machine which it is believed are un necessary to refer to in detail. n

This baclespacing mechanism comprising an actuating key 10 conveniently positioned in the ke board of the machine-and connected by a lint and levers with the back-spacing dog 9, which latter, until operated, lies adjacent but normally out of contact with, the escapement wheel 7. 'llhe key 10 is secured to one end of a` vkey-levery 11 pivotally mounted upon a shouldered nut 12 engagllt) ing a` boss or stud 13 'proieeting inwardlyA by the comb member 14.

es'capement wheel, where of back space'key 10,' is, of course, limited As soon as thekey is released, the spring Atensioned by the downward movement, acts upon the arm 34 to return the parts silently to their original or i varm co-acts with lthe adjusting screw 41 normal position. The

at the .end of the rearward movement, thus tion just clear ofthe path of travel of the it may besubsevquentlyactuated without moving .a sufficient distance to produce any clicking noise. It is, of course, understood that the escapement. mechanism 6 co-acts` with the succeeding teeth of the escapement wheel to prevent a returnmovement thereof.' 1

If, for any reason, further backward ovement 'of the carriage anda correspond- 'ing movement of the escapement wheel is positivelyv prevented, the spring 23 connectmg the levers ll'and 18Wvill take up the force exertedand relieve the strain upon the moregdelicate parts.

'From'the above description, it will be seen that the presentv construction is of a simple and practical'v nature, inexpensive to manufacture and designed to accomplish, among others, `all of theobjects and advantages Asmany changes could be made in the above', construction and many apparently this invenit is intended that all vthe Scope thereof, l

in the above description or `matter contained s'hown in the accompanying drawings shall 'be interpreted as illustrative and not in a .limitingsensa Having described invention, what I claim as new and Patent ist 4- :1. a 'ftypewriting machine, in combina tion, a '.-carriage-controlling rack, a backspacing dog therefor having means to limit desire to secure 4by Letters movement thereof, and a stop to coact with trolling the normal 'said means for vnormally maintaining said dog-out of engagement with said rack.

`2.'.In'a typewriting machine, in combination, an escapementrack, a dog rocker, a supporting bracket for said rocker, a back- Spacing dog, and a stop o n saidbracket conposition of said backspacing. dog.

3. In a typewriting machine, in combi-nation, a horizontally disposed rack wheel at the rear of the machine, a back-spacing key operative connecting means between said elements including a medially pivoted lever extending transversely-at the rear of the machine, and -a -spacing dog pivoted thereon adjacent tively prevented. T he downward movement 32, which has been the dog toa posiadapted to co-act therewith,

4. In a typewriting machine, v'incombina- I tion', a horizontally .disposed escapement wheel at the rear center of the machine,an actuatin chine, a to said key, a thrust member attached tothe other endof said lever, and ya transversely extending medially pivoted lever lattached tol said thrust member and provided at its opposite end with a pivotally mounted backspacing dog to cooperate with said wheel. v '5. In a typewriting machine, in combination,` an escapement rack, a dog ladapted to co-act. therewith, an actuating key, connections between said key and dog including a two-part b'ell crank lever, and yielding means for holding said parts of said-bell'. crank lever in relatively fixed relation. f 6. In a typewriting machine, in combination, an escapement rack, a do adapted to co-act therewith, an .actuating ey, connec-v tions between said key and dog including a two-part bell crank lever, and spring means yieldingly'holding said partsin normal fixed relation.

tion, an escapement'rack, a backfspacing dog `adapted to coact therewith,- lanactuating key, connections between said key vand dog including a two-part bell crank lever, projecting portions on each of said parts, and spring means connecting said portions for holding the parts of said lever-in normal fixed relation.

8, In a typewriting machine, in'combinahaving a normal operative position at right angles thereto,'and spring means connecting said levers and adapted to hold them in such normal position except when subjected to undue strain.

`9.' In a typewriting machine, in combination, an escapenient rack, a back-spacing dog an actuating key, connections between said key and-dog t'lncluding a pivotallyinounted lever, a support upon which said lever is mounted, and a l coil spring about said support, one end of which is adjustably mounted. and the other end of which is adapted to elo-'act with ysaid lever for returning the parts to normal position.

l0. In a typewriting machine, in combination, a rack, a back-spacing dog adapted to co-'act therewith, an actuating key, connections between said keyand dog including a pivotally mounted lever, an arm on said lever forming a bearing therefor, and a coll spring positioned about the pivot and coacting with said arm.

11. In a typewniting machine, in combinaltion, a rack, a back-spacing dog adapted to eo-aet therewith, an actuating key, connections between said keyand dop,` including a lever. pivotally mounted near its middle, an

die, an arm on said lever toi-ming a bearing therefor` a coil springpositioned about the pivot and eo-acting` with said arm, and means adapted to ad] ust the tension of said spring, said means including` an adjustablenut to which one end of the coil spring 1s secured, and locking means for holding, the nut in adjusted position.

13. In a typewriting machine, in combination, a rack, ay baek-spaeinfr dog` adapted to eo-act therewith, an aetf` inf key, eonnections between'said key and. dog ineluding,` a pivotally mounted lever, an arm on said lever forming, a bearing therefor, a coil spring positioned about the pivot and eoacting with said arm, and means adapted to adjust the tension of said sprine.

14. In a typewriting.machine, in combination, a rack, a back-spacing dog adapted to co-aet therewith, an actuating key, connections between said key and dogl ineluding' a lever pivotally mounted near its 1nidelle, and a support for said lever comprising aI shouldered screw, the lever' beingl mounted upon the shoulder of said screw.

15. In a typewriting` machine, in combination, a rack, a back-spacing dog` adapted to eo-aet-therewith, an actuatingA key, connections between safid key and dog including a pivoted lever, an arm on .said lever forming abearing therefor, a coil spring positioned about the pivot and cci-acting.

. with said arm, and means adapted to adjust the tension of said spring, said means including a stud supported from tho frame of the n'iaehine, and a shouldered lock screw engaging a tapped'out portion of said stud, said lever being adapted to turn on the shouldered portion ot said screw.

1G. In a typewriting' machine, in eonibination, a rack, a back-spacing dogadapted to co-aet therewith, an actuating key, connections between said key and dog' including' a pivotcd lever, a coil spring` positioned about the pivot and cont-.tine` with said lever, and means adapted to adjustthe. teusion of said springincluding a nut supported from the traine of the machine to which the spring' is connected, and a shoiildei'cd screw engaging,r said nut. said lever being adapted to turn on the shouldefijcd portion of said screw.

17. In a typeivriting' machine, in con'ibination, a. rack, a btu-.k-spaciup, dog adapted to co-act therewith, a key at the ,keyboard of the machine. and intermediate conuections between the dog' and the key con'ipiisinga lever upon which the key is mounted, a second lever upon which the dog is mounted, a Connecting link between Said levers, said back-spacing do;l having a plurality of arms, one ot' which is adapted to engage the top and'side ot' a tooth on said rack and another ot' which is adapted to enter the space `between two ot' the Succeeding' teeth to prevent overthrow of Said rack.

18. In a typewriting;l machine, in combination. an escapcment rack, a back-spacing dog adapted to co-act therewith. :i key at the keyboard of the machine, intermediate com'iections between the dogg,` and the key comprising` a, lever upon which the key is mounted, a second lever upon which the dogg is mounted, a connecting link between said levers, said back-spacing dog haviinc` a. irilurality of arms, one of which is adapted to engage the top and side of a tooth on the eseapement rack andanother oi' which NILS II. ADI) (SON.

Witnesses .latins lx. GUY, EDWARD N. SLAVIN.

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