US1407071A - Foot-margin regulator and indicator attachment for typewriting machines - Google Patents

Description

L. v. LARSEN, DEGD.

M. r. AND E. 0. LARJSEN, EXECUTORS.

FOOT MARGINREGULATOR AND INDICATOR ATTACHMENT FOR TYPEWRITING MACHINES.

APPLICATION FILED NOV. 2. 191$. 1,407,97L v I Patented FebTZI, 1922..

3 SHEETS-SHEET 1. v

Xm vent oz L. LARSEN, DECDQ I m. F. AND E. 0. LARSEN, EXECUTORS. FOOT MARGIN REGULATOR AND INDICATOR ATTACHMENT F 0R TYPEWRITING MACHINES.

APPLICATION FILED Nov. 3. 1919.

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3 SHEETS-SH L. V. LARSEN, DECD. M. F. AND E. 0, LARSEN, EXECUTORS. I 7' FOOT MARGIN REGULATOR AND INDICATOR ATTACHMENT FOR TYPEWRITING MACHINES.

' APPLICATION FILED NOV. 3, 1919- 9 1 71. I I Patented Feb. 21, 1592 3 SHEETS SHEET 3. A

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application filed November 3, 1919. Serial No. 335,462.

To all whom it may concern:

Be it known that Laor: V. LARSEN, deceased, late of Paris. in the county of La mar and State of Texas, did invent a certain new and useful Foot-Margin Regulator and Indicator Attachment for Typewriting Machines, of which the following is a specification. i

This invention relates to an attachment for typewriting machines,' of any standard or approved ,make, which attachment may be convenientlyadapted to the typewriting machine in connection with the cylindrical platen thereof, in such manner that the mechanism of the said attachment Wlll reciprocate with the action of the .platen'in its movement, and revolution, for indicating, as well as regulating and controlling, the number of line spaces that have been negotiated by the platen, thereby permitting the automatic checking or stopping of the move f the number of lines which ment of revolutions of the platen at any line, or whenever a predetermined number of hne spaces have been accomplished, thus permittingthe preserving of any desired margin at the foot of a sheet of paper, used in t e typewriter.

It is an object of this invention to pro vide a foot margin regulator and indicator attachment for typewriting machines .by means of which the typist may determine at any place on the paper sheet being written,

ten or transcribed.

Other objects of theinvention will appear in the following detailed description taken" in connection with the accompanying drawings, forming a part of this specification and in which drawings:

' Figure 1 is a top plan of the improved foot margin regulator and indicator attachment showing it applied at a fragment of the carriage of the typewriter.

Figure 2 is a longitudinal section through the attachment taken. on the line 2'-2 of Figure 1.

Figure 3 is a cross section through the attachment taken on the line 3-3 of Figure 2.

Figure 4 is a detail perspective view of the movable indicator of the attachment.

Figure 5 is a detail perspectiveview' of the pawl or, finger of the attachment.

F1gure 6 is a side elevation of the removable resilient stop which is adapted ferathave been writ- I tachment at any desired position to the is a top plan of a modified form PATENT orrlce.

rams, Taxes, BY MAY FUBEY mnmor LARSEN, or cnrcaoo, rumors, EXEGUTORS.

Specification of Letters latent. P t t '21, 1 22,

of the attachmtnt showing it applied to a fragment of the typewriting machine. I

Referring more paticularly to the drawe5 ings, wherein like characters indicate like and corresponding parts throughout the several views','t-he platen A of the typewriter structure -B, is made up in the usual manner,

preferably ofa wooden cylindrical core C. the outer surface of which has mounted thereon a resilient sleeve D forming the cushioning surface over which the writing paper passes. The foot margin regulator and indicator comprises a metal sleeve 10,.

which is bored to fit about one end of the. core C of the platen'A, as clearly shown in Figure 2 of the drawings, and the outer'surface of this sleeve 10 is provided with a spiral groove 11, forming substantially j square threads thereon, which are graduated as illustrated at 12, to conform to the number of double space lines on paper.

The sizes of writing paper most universally in use are the standard letter size, 8% by 11 inches, and the standard legal size 8% by 14 inches. In running letter paper through a typewriter, it requires 33 double-spaces to move the paper from the time it first appears at the writing. lineluntil the endis reached on the letter size, while. the legal size requires 42 double spaces tomove it through double spaces are required to bring the paper in position at theFw'riting' line on the platen, at which time. the writing surface of' the paper first becomes visible. For the purpose of taking into account these first five double spaces required to bring thepaper into proper position for writing, the narrow groove 11 extends back from the first aduation 12 thereon a distanceequal to the" iii e double spaces, to its beginning-point as indicated at 13.

A pawl 14, is provided with a rounded end 15 which rides in the spiral groove 11,

and co-acts with the graduations 12 to indieate the number oflines, erline spaces that,

.the typewriter'after it first appears at the writing line to the end ofthe sheet. Five n. ill

have been passed over the platen A during the operation of the typewriter. The end oi the pawl 14 remote from the rounded knob or end 15 is bifurcated to form spacedears 16 by means of which'the pawl is pi'votally connected'to a pivotally mounted lever 17. A spring 18 is coiled about the pivot end 19 of the pawl 14, and one end of this spring engages the pawl while the other end engages the lever 17 the said spring tending to urge the pawl 1d outwardly, which outward movement is limited by the downturned end 20 or the lever 17. The lever 17 which is substantially an inverted U-shape in cross section is pivotally mounted intermediate its ends, hpon a rod 21, which is carried by a suitable bracket 22.

This bracket 22 is attached to the frame of the typewriter carriage B. The spring 23 is coiled about the pin 21 and has one end engaging the lever 17 while the other end engages the typewriter carriage B as clearly shown in Figure 2 of the drawings. This spring 23 tends to urge the inner or pawl carrying end of the lever down toward the axis of the platen A The outer end of the lever 17 is preferablycon'caved as shown at 24, so asto provide a finger engaging surface to permit the gradual operation or rocking ef the levers 17 torelease the pawl 14 to re-set the attachment attera sheet of paper has been moved through the typewritingmachine; or to release the platen after its rotation has been arrested by. the engagement of the pawl 14 with the stop 25.

The stop 25 is preferably constructed of flat spring'metal; is substantially U-shaped in side elevation as shown in Figure 6 of the drawings, having the ends of its legs rolled to form eyes 26'. The sides of the groove 11 are recessed, to provide arc'uate recesses 27, which receive therein the rolled eyes 26 of the stopQfi, for connecting the stop to the groove cylinder 16 atany desired point. During the rotation of the platen A and when the pawl it strikes the stop'25, rotation of the platen will be arrested, and this stop 25 may beset alongsideany one of the graduations 12, desired to permit the maintaining of any desired margin atthe foot of the papersheet-used in the typewriter. In

I addition to maintaining a uniform foot marginon the successive sheets of paper passed through the typewriting machine the margin can be varied on the different sheets by i simply setting the spring clip or stop at any numeral corresponding to the desired line; and thus a desired or-adequate foot margin may be preserved on paper of smaller (llm'en. slons than the standard letter or legal size,

fihe foot margin regulator attachment above described is designed in this instance;

wjith special reference to the Underwood typewriter, model 5. However the device is adgwstable to any standard maize of typespiral scale indicating the line spaces may be used and located parallel "to and connected with the platen of the typewriting machine in any suitable manner, such a.

modified formof the invention'being illustrated in Figure 8 of the drawings. i

In this modified form illustrated iii-Figure 8, the 'cylihder 30 is rotat ably supported at one side of and parallel to the platen E of the typewriting machino thesaid-cylinder being made'in the same proportions as the platen E and rotatably supported by a suitable supporting bracket 31, which may be attached tothe framework end of the typewriting structure in any suitable manner.

This cylinder 30 is provided with a spiral groove 32 forming square threads 33 which are graduated similar to the raduations 12 and to indicate the various ine spaces of 'paperpassed over the platen E. A pawl 14, rides in the groove [32, and this pawl is pivotally carried by the pi-votally mounted lever 17. The pawl 14 and level-'17 are constructedsimilar to thepawl 14 ahd lever 17 illustrated'in the preferred form of the invention, differing therefrom only in size, when such difierences are necessary, to properly proportion them in accordancewlth t size of the cylinder 30. The lever 17 is pivotallyisupported by suitable brackets 22' upon the frame E of the typewriter. A I

bevelled'gear 34 is carried at the outerend of the cylinder 30 and it meshes with a bevelled gear 35.whicl1 is carried by a shaft 36. This shaft 36 is rotatably supported i from the frame D and has a bevelled pinion 37 thereon which meshes, with the bevelled gear'38 carried by the platen E and thus the cylinder 30 is connected'to the, platen E for synchronous and proportionate rotation therewith. Spring stops similar to the stops. 1

25 are to be 'used in connectionwith. the modified form of cylinder 30. I

Changes in details may be made without able stop adapted for adjustment and engagement with said pawl for arresting movement of the line-feed mechanism at a predetermined point, and manually operable means for moving said pawl out of engage;

ment with said stop to automatically position said pawl in starting position. 2. In a foot margin regulator and indicator attachment for typewriting machines,.'-

including a frame and a rotatable platen ofa cylinder carried at one end of said platen and provided with a. spiral groove and with graduations thereon, alongside said groove to indicate the line feed of the platen, a haiid lever pivotally carried by the frame of the typewriting machine, an indicator pawl piv-.

otally carried at one end of said hand lever and adapted for engagement in said groove and co-action with said graduations, a spring normally urging said indicator pawl outwardly, the end of said hand leverbcing downturned to term a stop for limiting the outward movement otthe indicator pawl.

4. in a foot margin regulator and indi-- cator attachment for type'writing machines, the combination with a typewriting machine including a frame and a rotatable platen, of a cylinder carried at one end oi said platen and provided with a spiral groove and with graduations thereon alongside said groove I to indicate the liiiefeed ot' the platen, a hand lever pivotally carried by the frame of the typewriting machine, an indicator pawl pivotally carried at one end of said hand lever and adapted for engagementin said groove and co-action with said graduations, a spring normally urging said indicator pawl outwardly, the end of said hand lever being downturned to form a stop for limiting the outward movement of the indicator pawl, a

spring stop substantially U-shaped in cross section and adapted to frictionally engage the sides and the groove for connecting the stop and the cylinder at a predetermined position, said pawl adapted to] engage said stop for arresting rotation of the platen.

5. In a foot margin regulator and indicator attachment for typewriting machines, the combination with a typewriting machine including a frame and a rotatable platen, of acylinder carried at one end of said platen and provided with a spiral groove'andwith 'graduations thereon alongside said groove to indicate the lined eed ofthe platen, a hand lever pivotally carried by the frame of the typewriting machine, an indicator pawl pivotally carried at one end of said hand lever and' adap'ted for engagement in said groove and co-action with said graduations, a spring normally urging said indicator pawl'outwardly, the end of said hand lever being down turned to form a stop for limiting the outward movement of the indicator pawl, a

spring stop substantially U-shaped in cross section, and adapted to frictionally engage the sides and the groove for connecting the stop and the cylinder at a predetermined position, said pawl adapted to engage said stop for arresting rotation of the platen, said I hand lever movable for moving said indicator pawl out of saidgroove, and a spring engaging said hand lever for normally urging it in a pawl returning position.

6. In a foot margin regulator andindicator attachment for typewriting machines,

the combination, of a cylinder mounted within the ordinary supporting frame of said typewriter and abutting upon the platen of said typewriter, to lie concentric therewith, the exterior surfaces of said cylinder and platen being in abutting alignment, said cylinder having spiral grooves therein, a pawl mounted upon the frame of said typewriter, andadjustable means positioned within the groove of said cylinder, and adapted for engagement by said pawl to prevent rotation of the platen at a redetermincd point.

- AY FUR'EY LA RSEN, lsmccutriw of estate of lean V. Larsen,

deceased.

ERMA oiivniiin LAiisEN,

-/';nccuto7' of the estate of Leon V. Larsen.

deceased.

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