US1583279A - Typewriting machine - Google Patents

Description

May 4 1926.

c. M. CREWS 4 TYPEWRITING MACHINE Filed June '7, 19524 I Patented vMay 4, 1926.

A, 1,583,279 PA ENT OFF-ICE.

UNITED-sures CLARENCE I. CREWS, OF BROOKLYN, -NEW YORK, ASSIGNOR' TO UNDERWOOD TYPE- WRITER COMPANY, OF NEW YORK,.N. Y., A CORPORATION OF DELAWARE TYP WRITING' MACHINE Application filed June 7, 1924'. Serial No, 718,478. I

To all whom it may concern:

Be it known that I, CLARENCE M. Cnnws,

a citizen of the United States, residing in Brooklyn Borough, in the county of Kings,

6 city and State of New'York, have invented certain new and useful Improvements in Typewriting Machines, of which the following is a specification.

This invention relates to continuous billing typewriting machines. In a'machine of this class a set of carbons is ordinarilyattached to a carbon-carrier which is advance able toward the platen with an interleaved Work-web at line-feeding, and is retractiblefrom the platen and relatively to the interleaved work-web upon displacement of the platen, to strip thecarbons froma typed form-section and interleave them with the form-section next to be typed. The carbons are arrested by a stationary rear stop, always in the same rearward position, and hence the type blows at the writing of suc cessive forms fall always in substantially the same locations on the carbons, which causes the carbons to be worn out in stripes,

so that they must be removed from the machine and replaced without being used to their utmost capacity. ing the carbons is especially wasteful because the carbons are ordinarily quite long.

The changing of the carbons in the machine, moreover, is a time consuming operation which it is desirable to postpone and avoid as much as possible. 4

It is an object of the present invention to provide means. for causing the carbons of a continuous billing machine to beworn out uniforml so that the maximum use, and len h'o service, may be obtained from the 49 car ons.

To this end provision may be. made of means to arrest the retraction of the carboncarrier in a slightly different location at successive retractions thereof, so that the.

5 type blows will becaused to fall upon slightly different portions of thecarbon at the writing ofthe succeeding forms. As

illustratedherein the carbon-carrier arrest 'mgmean's may'conslst of an eccentric cam,

59 and means engaged and actuated by the carbon-carrier in its rearward movement to rotate the cam a, shortdistance, With this arrangement the rear-stoppmg position of the -,carbon-carrier is caused automatically to esthe stop-feeding means.

This method of us-- cillate back and forth withina short range,

so that the carbons at successive writings are shifted progressively by fractional line-- space degrees with reference to the writing line of the machine and so are completely worn out by the ordinary use of the ma:

chine. v V v Other features and advantages will herelnafter appear.

In the accompanaying drawings,

I Figure 1 1s a sectional side elevatlon of a a portion of a continuous b1ll1ng machine having the present improvements applied thereto, the machine bemg cut away at an inter inediate portion for compactness of illustraion. 1

Figure 2 is a vertical section on a larger scale than Figure 1, taken on the line 22 of Figure 1, looking in the direction of the arrows, and showing the details of the stop mechanism.

Figure 3 is a detail View of a portion of Figure 4 is a fragmentary sectional side elevation of the stop-feeding means and carbon-carrier with the carbon-carrier near the rear limit of its movement.

Figure 5'is a fragmentary plan yiew ofthemechanism shown in Figure 4.

The which is of the type disclosed in the patent to Vvernery & Sm1th, 1,132,055, comprises a illustrated typewriting machine,

revoluble cylindrical platen 10 which is j ournaled by its axle 11 in a displaceable platenframe 12 mounted upon a carriage 13 that travels in letter-feed .and return directions,

as usual. Acarbon-carrier 14 is' mounted to 'travel'toward and from the platen 10 upon rails 15, forming part of a long carriage extension 16 that travels from side to side withvthe carriage and is supported at its rear upon a rail 17 carried by a rear extension 18 of the machine-frame. A multiple-ply continuous Work-web 19 is led into the machine between side-guides 20 atthe 1 rear extremity of the carriage. exten'SionlG, and thence 1s led forward ln'interleaved relation with a set of carbons 21 carried by" carbon-blades 22 on the carbon-carrier 14.

The work-web 19 and carbons 21 are'ad I vance'd totgether by the platen 10 in con.-v

junction with co-operating-feed-rolls .22 by actuation of the usual line-spacingmecha 'nism (not shown) until the first form is] to the rear by its handle 26 to strip the carbone 21 from the typed web-section and interleave them with the section next to be t ed. ,7 v

y eretofore'the stop for limiting the rear.- ward movement of the carbon-carrier has been maintained stationary. According to the present invention provision is made of an eccentric cam stop 27 which is rotatably mounted on a shaft 28 fixed in clamping . brackets 29 and 30 adjustablysecured upon.

the left rail 15 of the carriage extension 16 a and upon the central longitudinal bar 31 of said extension, respectively. 27 is made fast to a ratchet-wheel 32 by means of pins 33 on the ratchet-wheel, and" the position of the cam 27 and the ratchetwheel' 32 lengthwise of the shaft 28 is controlled by the bracket 29 and a collar 34 fast on the shaft 28. An oscillatory arm 35 plays between shoulders'36 and 37 on the bracket 29, and carries a pawl 38 whlch is pressed by a spring 39 into co-operatlve enprojec-ting pawl 41 on the oscillatory arm 35 each vtime that the carbon-carrier 14 is moved to the rear, to rock the oscillatory arm from the full-line position of Figure 4 to the rearidot-and-dash line position 35' to impart a feeding step to the ratchet-wheel 32, and through the ratchet-wheel to the eccentric cam. stop 27 The parts are so constructed that the projecting arm 40 leaves engagement with the'pawl 41 as seen in dotand-dash lines in Figure 4 when the ratchetwheel 32 has been rotated one toothspace.

'The oscillatory arm 35 is thereupon returned to its normal full-line position by a spring 42. The rearward movement of the carbon-v carrier 14 is finally arrested by engagement of a rojection 43 on the carbon-carrier with the out face-of the eccentric cam 27. As the position of the cam 27 varies continually, due to this pro essive feeding, the rear limit of the car n-carriers movement is correspondingly varied,;so that slightly different portions of the carbons 2 1 are made effective for each form typed.

The pawl 41 is normally held upright and rigid against ashoulder 44 on the oscillatory arm 35 -by,-a spring 45. At the forward movement of the carbon-carrier 14 this spring 45, with the pawl 41, is turned down to the dot-and-dash line position 41' of Fig- The cam stop ass.

lution of the cam stop 27 the carbon-carrier 14 is arrested progressively farther to the rear, and that for the next half revolution It will be understood that for a half revoure 4 by the arm 40, permitting said arm to it is arrested progressively farther forward.

In other words, the arresting position oscillates backward and forward. The extent of this oscillation may be slightly less than a double line-space, so that in case the machine is set for double line-spacing the zone within which the first-line type blows fall on the carbons will touch, butwill not overlap the zone within which the second-line type blows fall. This variation will not prevent the use of the carbons as near to the tops of the forms as desired, because the forms have printed headings which occupy a considerable space at their upper margins. At the same time this amount of variation may be had w thout danger of the carbons being severed at their forward ends with the workweb, by the knife 46. ,The cam is preferably contoured to cause the carbons to progress by uniform steps," so that every portionwill receive exactly the same amount of wear.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I

claim: gagement' with the ratchet-wheel 32. The carbon-carrier 14 has arearwardly-pro ecting arm 40 which engagesan upwardly 1. In a continuousbilling typewriting ma- .chine, the combination with a revoluble platen and a carbon-carrier retractible from the platen to reposition-the carbons with 7 reference to the work-web and the platen, of means operated automatically by the movement of the carbon-carrier to arrest the carbon-carrier in slightly different position at each retraction thereof.

2. In a continuous billing typewritin ma- I chine, the combination vwith a revo uble platen and a carbon-carrier retractible from the platen to reposition the carbons with reference to the work-web and the platen, of anadjustable stop to limit the rearward movement of the carbon-carrier, and means dependent upon the operation of said carboircarrier for automatically adjusting the stop... c a

1 3. In a continuous billing typewriting machine, the combination with a revoluble platen and a carbon-carrier retractible from I the platen tQIGPOSltiOH the carbons with reference to the work-web and the platen, of means automatically to cause-the carbons to be oscillated slowlyby' fractional line-space degrees with reference to the writing line tions.

. 4.- In a continuous billing typewriter machine, the combination with a revoluble platen and a carbon-carrier retractible from the platen to reposition the carbons, of adthroughout an extended period of opera justable means to arrest the retraction of the carbon-carrier and thereby control the position of the carbons with reference to the line of writing, and means ctuated by the retraction of the carbon carrier to adjust automatically the carbon-carrier arresting means.

5. In a continuous billing typewriti'ng machine, the combination with a revoluble platen and a carbon-carrier retractible from the platen to reposition the carbons with reference to the Work-web, of an eccentric rotatable cam stop in the path-of the carbon-carrier, and means actuated by the carbon-carrier in its rearward movement to rotate the cam to bring different portions of its surface into position to intercept the carbon-earrier.

6. In a continuous billing typewriting machine, the combination with arevoluble platen and a. carbon-carrier retractible from the platen to reposition the carbons with reference to the work-web and the platen,

of an eccentric rotatable cam stop in the path of the carbon-carrier, a ratchet-wheel fast to the cam, a pawl for feeding the ratchet-wheel step by step, and means carried by the carbon-carrier to actuate the pawl at each rearward movementof the carhon-carrier.

7 In a continuous billing typewriting machine, the combination with a revoluble platen and a carbon-carrier retractible from the platen to reposition the carbons with 7 reference to the work-Web and the platen, of

an eccentric rotatable cam stop in the path of the carbon-carrier, a ratchet-wheel .fast

to the cam, a pawl for feeding the ratchet? wheel step by step, a pawl-carrying arm, a projection on the carbon-carrier for engaging and actuating the pawl-carrying arm to feed the ratchet-wheel a tooth space in the course of the carbon-carrier retracting movement but not in the last portion thereof, and means enabling the projection on the carbonearrier to pass the pawl-carrying arm in thei'orward movement of the carbon-carrier.

8, In a continuous billing typewriting machine, the combination with a traveling carriage and a carriage-extension, of a revoluble platen, a. carbon-carrier retractible from the platen to reposition the carbons with reference to the work-web and the platen, an eccentric rotatable cam' stop in the path of the carbon-carrier, a shaft on which the cam stop is mounted, and clam ing brackets for adjustably securing tl ie shaft in various locations upon the carriageextension. 4

9, Ina continuous billing typewriting machine, the combination with a revoluble platen, a carriage, a carriage-extension and a carbon-carrier retractible from the platen ,along the carriage-extension to reposition the carbons with reference to thework-web justing the stop .and its feeding meansv to various positions upon the carriage-extension. 1

oni nnuon M. answerand the platen, of a. carbon-carrier stop,

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