US1451423A - Typewriting machine - Google Patents

Description

-Apr. 10, 1923.

G. F. HANDLEY TYPEWRITING MACHINE Filed May 27, 1922 2 she ets-sheet 1 INVENTOR E Mg ls ATTOR N E (TI v G. F. HANDLEY TYPEWRITING MACHINE Filed May 27, 1922 2 sheets-sheet 2 s INVENTOR 'BY HIS ATTORNE f zwdumyw :rnraQ 1,451,423 A? TEN GEORGE E emmer; rna nt am ssam T0 spie meme Tw ter-RIN Application filed n 27, 1922., -Seria1- No. 56 1,p99-.-

T 0 all whom it may 007 1 061% v 1 Be it known that I, GEORGE F. HANDLEY,

a citizen of the United States, residing in Glendale, in the county oiQueens and State 5 of New York, have invented certain new and useful Improvements in Typewriting' Ma it can be rapidly broughtiinto service. when multiple manifolding is desired or when the main platen is not sufficiently hard or firm to produce multiple manifolds. It isgenerally desirable to use a soft platen-tor ordinaryservicewhen only a few 2o carbon copies are needed as less noise is produced when a soft platen islused, but in such cases-it has hitherto. usually been the custom to detach the soft platen trom themachine and replace it'by, a hard platen when many carbons are needed. This is dzifiicult for some operators'to do and consumes considerable time. .These difiiculties, have been, overcome by the use, of an auxi-l iarytplaten which is so' applied to'the. machine that it 39 maybe moved: from aninactive to an active position. either directly or by frictional contact with some part of the. main platen. This invention is shown, described, and

claimed in an application ofEdward: B.

" Hess, filedApril 21, l922, Serial No, 555,853. Said application shows. a strip of relatively hard metal: extending from end to end of the main platen. and'connected-at its ends todevices for locking 1t in act lveand mac 40 Such invention. is, therefore, not herein broadly claimed, but according to my invent1on .-improved means are provided for 'moving the auxiliaryplaten from one posi--' tion to another for looking; it in active and inactive positions and forfpreventing overthrow and for maintaining a perfect; register of the auxiliary platen with the main platen.

In carrying outrmy inventionin. the preferred way I provideineans at opposite endsof: themain platen for supporting the opposite ends-of;- the auxiliary platen and 'for' producing such friction. between these parts that the auxiliary platen may be a device for preventin tion. whe11 'tl:;1uslocated. I

tive positions and-for preventing overthrow a covering C of soft,material,hubsgDv and tional contact therewith orias shown'may,

moved from active to inactive; position and vice :versaby turningrthe main platen'.'- In r such case there isnotfnecessari'ly a frictional engagement between the:auxiliary platen:

and the cylindrical l surface oi?" the main platen. I have also added to themechanism any possibility of overthrowwhen the auxiliary platelil isnioved,

to active or inactiveposition and this device;

also serves to hold the auxiliary platen ac; curately lnwtheline of; printin active. posi In the accompanying drawings v Figure/1 is a View; Of? arniain orrcylindrh i cal platen with my improvements applied, 4 some parts being shown in elevation? and" 7 some in section and. some parts being broken away for clearness ot illustration.

Figure 2- shows a transverse sectionv on the line of Eigurejl. f "I J I F'gure is a,v detail view on' anenlarged scale showing particularly thefdevices tor" obtaining frictional contactcbetween the aux; illary platen and the main platen whereby the auxiliary plateltfmaybe. niovedrcoinc' idently withg-the main platen or inay be movedindependently thereof; F'guree s a diagrammaticillustration in plan oii certain features 0t construction at one end of the platen; I c Eigure-5-is, aside view- .oti some oftheparts illustrated in Figure 411 l In Figures 4 and 5, the parts illustrated are, shown'in the, active position of thefauxiliary platen, Y -I Figures .6: and 7 are views; similar to. Fig? ures 4: and 5, themechanism being shown i the inactive position of the auxiliary platen. The main platen, parts of Which are, shown 1n lfilggurex ,,c'ompri ses a shaft A, a shell- B,

vspacing is indicated at and H indicates partsof the end'plates of the; carriage frame. The-auxiliary platen preferably con sists of, a narrow stripof'hard material, pref erably metal, which extends from endto end of the, main platen and maylie in tricbeheld a short distance; from the. cylindrical 1 surface thereof; The; strip, on, its inner and; outer sidesfhas a curved surface correspond a i gwi h the cu va ure o the p ten an on sr n r slide f ssmo th nd soishaped; astO.

correspond with the curved characters on the type bars. The opposite ends of the auxiliary platen are supported by devices which are mounted to turn about the axis of the main platen. Preferably these devices are connected with the hubs of the main platen and the arrangement is such that the auxiliary platen may be moved'from one position to another by reason of the frictional engagement of the supports of the auxiliary platen and, parts of the main platen, it being understood that in this connection the platen shaft is considered a part of the main platen. Various devices may beernployed for the purposes above mentioned, but as shown the right hand end of the auxiliary platen is connected by an arm Z to aring L surrounding the platen hub E and freely movable thereon. The ring L is engaged by a spring M surrounding the hubv and engaging the adjacent end plate 0 of the; main platen. The spring M presses the ring L against a collar N secured to the platen shaft by a set screw 0 which extends through the collar and the hub and engages the shaft. In this way the desired friction is produced between one of the supports of the auxiliary platen and a part of the main platen so that when the main platen is turned, the auxiliary platen is correspondingly moved when desired, but when required the auxiliary platen may be moved independently of the main platen.

The opposite end of the auxiliary platen is secured to a ring P surroundingtheplaten hub D. The inner diameter of this ring is somewhat greater than the diameter of the hub D and it is supported by spring plungers Q, arranged radially in the hub and normally projecting a short distance therefromg Any desired number of. plungers may be 8UP ployed, but three as indicated in Figure 2 have been found to besufiicient. observed by reference to Figure 8 that the plungers Qare formed on their outer ends with grooves Q in which the ring P is seated. This construction permits a slight eiidwise movement of the auxiliary platen to allow the spring M at the opposite end of the platen to :pi'o-perly'function. In this way a frictional'engagement between the auxiliary platen and the'niainplaten is produced whereby the auxiliary platen may be moved if desired coincidentally with the main platen. The devices shown at the left hand end of the platen may be also used at the right hand end, but I perfer to employ there the devices before described.

In order to'lock the auxiliary platen in active and in inactive positions I employ a pawl R- pivotallyinounted on the carriage frame in any suitableway. As shown, the pawl is attached to a rod S which may be mounted in the carriage in suitable bear ings as indicated in Figures 5 and 7. The pawl is provided with a handle r and with It will be stopsr, 7' adapted to engage the frame and limit the movement of the pawl in both directions. The toothed end if of the pawl is pulled downward by a spring .9.

(Figure 7) It will be observed that the front and rear walls of the notches u, a are straight and parallel and when engaged with the tooth t of the pawl are tangential to the axis of the main plate-n. The front and rear walls of the tooth 25 are similarly shaped so that when the pawlis engaged in a notch, no movement of the auxiliary platen can take place, but

the main platen is free to turn in the usual way. By lifting the pawl from the engaged notch, the auxiliary platen may be turned from inactive to active position or vice versa by merely operating theknobsorhandles of the main platen and when positioned, the pawl willlocl: the auxiliary platen so that the main platen may be turned in the usual way without disturbing the auxiliary platen."

f desired, the auxiliary platen may be used-as an erasing plate by turning it to the desired position and holding it friction.

ally by the devices above described.

In order to prevent overthrow of the auxiliary platen and to insure of its proper register in the line of print, I employ the de v ices shown in Figures 4: to 7 inclusive. As illustrated, a stop V is carried by the ring P in suitable position to be engaged by an auxiliary pawl W which co-operates with the pawl R. The stopV is formed with a bevelled end '2) with which the pawl WV engages when the auxiliary platen is in active position and its front end is adapted to engage the auxiliary platen in the manner shown in Figures 6 and 7 when said auxiliary platen is in inactive position. The pawl when engaged with the auxiliary platen in its inactive position serves as a stop to prevent any danger of overthrow and does not, therefore, strictly speaking, act as a pawl but more correctly as a stop to prevent accidental overthrow when the auxiliary platen is moved rapidly Or forceably for wards or rearwards.

The accidental forward movement of the auxiliary platen when in inactive position is prevented by the pawl R which locks it When the auxiliary platen is in place. moved to active position (Figures 4 and 5) the pawl R engages the bevelled end of the stop V and prevents overthrow after the auxiliary platen has moved "forward and co-operates with the-pawl R in holding'the auxiliary platen in perfect register with the I? of the pawl R.

Inorder to cause the toothed end of the pawl R- to properly engage the notch u or u it is desirable that theparts should not be platen, and means for exerting yielding, pressure on one of said supports in all posimade too long or too deep. Inasmuch as the pawl swings about an axis in rear of the platen, there is some danger of the pawl rising and being disengaged from the notches, but this danger is compensated by the parts IV and V when functioning in themanner before described.

I claim as my 1nvent1on':

' 1. Ina typewriting machine, the combination of a main platen and an auxiliary platen associated therewith and movable from an inactive position removed from the line of print to an active position in the line of print, and spring controlled means for. maintaining yielding frictional connec-' tion between the two platens.

Q. In a typewriting machine, the combination of a main platen and an auxiliary platen associated therewith and movable from inactive position removed from the line of print to active position in the line of print, means for yieldingly supporting one end of the auxiliary platen on the main platen, and devices for supporting the opposite end of the auxiliary platen comprising a ring surrounding a part of the main platen and spring pressed devices interposed between said ring and the main platen.

3. In a typewritingmachine, the combination of a main platen and an auxiliary platen. associated therewith andv -movailole from an inactive position removed from the line of print to active position in the line of print, means for supporting the auxiliary platen yieldingly at one end of themain platen, and means for. supporting the auxiliary platen at the opposite end of the main platen comprising a ring and spring pressed plungers carried by, the main platen.

I11 a typewriting machine, the cornbination of a main platen and an auxiliary platen having supports at opposite ends mounted to turn about the axis of the main tions of the auxiliary platen.

5. In a typewritmg machine, the combination of a main platen and an auxiliary platen having supports at opposite ends mounted to turn about the axis of the main platen, and means for exerting. yielding pressure on both supports in all positions ofthe auxiliary platen.

. supports and the end of the platen to yieldingly press said support against the collar.

.7. In a typewriting machine, the combination of a main platen and an auxiliary platen having supports at opposite ends mounted to turn about the axis of the main platen, and radially movable spring press 1 ed devices engagingthe support at one end to afford a yielding frictional connection platen.

8. In a typewriting machine, the combination of a main platen and an auxiliary platen associated therewith and 'movable from an inactive position removed from the line of print to active position in the line of print, means for locking the auxiliary platen in inactive position, and devices for preventing overthrow when the auxiliary platen is moved to inactive position.

9. In a typewriting machine, the combination of a main platen and an auxiliary platen movable to. active and inactive positions relatively to the line of print, means for locking the auxiliary platen in inactive position, and an auxiliary device carried by the locking means and engaging the auxiliary platen for preventing overthrow thereof. s

10. In a typewriting machine, the combibetween the main platen and the auxiliary nation of a main platen and an auxiliary platen movable to active and inactive positions relatively. to the line of print, means for locking the auxiliary platen in inactive position, and an auxiliary device carried by the locking'means and engaging the auxiliary platen for holding it in active position. 11. In a typewriting machine, the combination of the mainplaten and an auxiliaryv platen movableto active and, inactive posi tions, detent devices for locking the auxiliary platen in its adjusted positions, and

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