US1081459A - Line-spacing mechanism for type-writers. - Google Patents

Description

Witnesses J; E. MOLLE.

LINE SPAOING MECHANISM FOR TYPE WRITERSJ APPLICATION FILED FEB.10, 1913.

1,081,459, Patented Dec. 16, 1913.-

one or more lines, as desired.

EDI-1N E. MOLLE, OE VJAUSAU, VVI SCONSIN.

LINE-SPACING MECHANISM iron TYPn-wmrnas.

Specification of Letters Patent.

Patented Dec. 16, 1913.

Original application filed August 3, 1908, Serial 170,446,677. Renewed December 12, 1911, Serial No.

665,378. Divided and this application filed February 10, 1913. Serial No. 747,506. 1'

To aZZ whom it may concern:

Be it known that I, JOHN E. MoLLn, a citizen of the United States, residing at Wausau, in the county State of Wisconsin, have invented a new and useful Line-Spacing Mechanism for Type-Writers, of which the following is a specification.

This invention relates to line spacing mechanism for typewriters and is more particularly a division of an application for United States Letters Patent filed by me on August 3, 1908, Serial No. 446,677, and renewed on December 12, 1911, Serial No. 665,378..

One of the objects of the invention is to provide simple and compact mechanism for rotating the platen, said mechanism including an adjusting element whereby the platen can be caused to rotate to shift the paper A further object is to provide mechanism of this character utilizinga single spring for holding the adjusting element in any position to which itmay be shifted and for holding the pawl and its actuating lever normally in set positions.

WVith the foregoing and other objects in .view which will appear as the. description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed, without departing from the spirit of the invention.

'In the accompanying :S.rawings the preferred form of the invention has been shown. In said drawings :-F igure 1 is an end elevation of a carriage having the present improvements combined therewith. F 1g. 2 is a plan view of one end portion of the carriage and of the platen shifting mechanism thereon. Fig. 3 is a view similar to Fig. 2 but showing a portion of the mechanism in section, one of the positions of the adjusting 'cam beingindicated by dotted lines. Fig. 4:

is a section on line A-B Fig: 3, the restraining dog and the rack shifting lever being shown in section.

Referring to the figures by characters of reference 33 designates a cylindrical platen of the usual or any preferredtype, the same being mounted upon a carriage having end of Marathon and.

hen indicated by dotted lines plates one of which is shown at 34. These plates are suitably connected, and arranged back of theplaten is a plate 54 constituting a paper guide. A depending bar is pivotally connected to the end plate 3 1 and carries, at its lower end, a rack bar C1. This bar may be made in one piece with the bar 60 and it is tobe understood that, if desired, one of the bars 60 may be located at each end of the carriage. The bar 60 extends upwardlyto form a lever 63 the upper end portion of which can be oflset to form a thumbpiece 64 adjacent the usual manipulating knob 65 of the platen. The foregoing parts constitute no parts of the-present invention but have merely been described as forming a part of the structure to which the present improvements are to be applied.

Secured to one of the end plates 34 of the carriage is a bracket 190 which may be fornr ed in a plate bent to form upper and lower leaves or thicknesses each of which is tapered toward its outer end as shown. At the outer ends of these leaves is. pivoted a line-spacing lever 191 the. free end of which is formed into a thumb piece 192. .The short arm of the lever is housed between the two leaves or legs of the bracket 190 and is made up of upper and lower wings between which is pivoted one end of a pawl 193, the other end of which is adapted to engage a ratchet wheel 191 on the platen shaft. A Ushaped strip is pivotally mounted between its ends upon the end plate 34and constitutes a re straining pawl 195, this pawl carrying a roller 1.95 which is held constantly in .con-

tact with the periphery of the ratchet wheel 19-1 by a spring 196 as shown particularly in Figs; 1 and r. A spring 196 is mounted on the pivot 197 of lever 191 and one leg of this spring engages a pin 198 on pawl 193. The other leg oi. the spring engages a regulating or adjusting lever 199 mounted in the bracket 1.90. The movement of the lever 191 in the direction urged by the spring 196 is limited by a stop pm 200 carried by the bracket 190.

Whcn the lever 191 is grasped to return the carriage to its initial position, as ordinarily, spring 196 first yields so as to permit said lever to pull on the pawl 193 thereby to cause the ratchet wheel. 194- to rotate. .The extent of this'rotation is determined by the lever 199 which may be shifted to the posiin --I*ig. 3, thus two line spaces.

1 pawl 193 and the It will be appar' ntthat when the platen to permit only suiiicient movement of the pawl to rotate. the platen one line space or which can be shifted to the cated by full lines in Fig. .3, thereby to permit greater movement of the pawl 193 and lever 191 and correspondingly greater movement out the platen which can thus be rotated It will be apparent that spring 196' operates to hold lever 199 in either of the positions to which-it may be shifted and, furthermore, serves to hold the lever 191 normally set.

and its ratchet wheel 1% are rotated the teeth of then'atcliet wheel. will escape over the roller 195 carried by the pawl 195 but the spring 196 will press said roller against-the ratchet wheel with sufiicient 'force to prevent the platen fromrotating too freely. I

What is claimed is 1. In a typewriter, a platen mounted for -rotation, a ratchet wheel revoluble therev and adjustable -ing said regulating 2. In a typewriter, a carriage, a platen,

a ratchet wheel, a linespa cing lever movable with the carriage, a pawlcarried thereby, an adjusting lever, and a spring mounted on the pivot of the line-spacing lever and having its legs in engagement with the pawl and adjusting lever respectively to hold the pawl and line-spacing lever in normal positions and to hold the adjusting leverin adjusted position.

3. The combination with a typewriter carriage,a platen mounted to rotate thereon,

and a ratchet wheel connected with the platen, of a bracket, a line-spac'ng lever pivotally mounted within the bracket and having spaced wings constituting one arm thereof, apawl pivotally mounted between the wings, an adjusting lever p voted with in the bracket and movable angularly to Copies of position indir limit the movement of the line-spar I 1g lever and pawl in one direction, and a spring mounted on the pivot of the line-spacing lever and having its ends engaging said adjusting lever and the pawl respectively to hold the adjusting lever in any position to which it may be shifted and to hold the pawl and line-spacing lever in normal positions.

4. Platen rotating mechanism for typewriters, including a ratchet wheel'revoluble with the platen a bracket movablefwith the'carria'ge, a line-spacing lever fulcrumed within the bracket, apawl pivotally con nected to one arm of said lever, an adjusting lever mounted within the bracket and ad justable angularly to limit the movement ot the pawl'in one direction, and a spring engaging the pivot of the line-spacing lever and having its legs engaging the pawl and the adjusting lever respectively for holding the pawl normally disengaged from the ratchet wheel and for holding the adjusting lever against accidental movement about its axis.

5. Platen rotating .mechanlsm for typewriters, including a ratchet wheel revolublc with the platen, carriage, a line-spacingwithin the bracket, a pawlpivotally 'con-, nected tonne arm of said lever, an adjusting lever mounted within the bracket and adthe pawl in one direction, a spring engaging the pivot ofthe line-spacing lever and having its legs engaging the pawl and the adjusting lever respectively for holding the pawl normally disengaged from the ratchet wheel and for holding the adjusting lever against accidental movement about its axis,

JOHN E. MOLLE.

Witnesses i" Bonner SCHMIDT,

this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

. Man'rna CLAUssnN.

a bracket movable with the lever tulcrumed justable angularlyto limit the movement of

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