US1155828A - Type-writing machine. - Google Patents

Description

A. LOPEZ.

TYPE WRITING MACHINE.

APPLICATION FILED APR. x. 1912.

1,155,828. Pmfiwd 0015.5,1915.

2 suns-shin A. LOPEZ.

TYPE WRITING MACHINE.

APPLICAYION FILED APR. 1, m2.

UNITED STATES PATENT OFFICE.

ARTHUR LOPEZ. OF NEW YORK, N. Y.. .ASSIGNOR TO THE HAMMOND TYPEWRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

TYPE-WRITING MACHINE.

Application filed April 1, 1912.

To all "whom it may (romern:

Be it known that I, ARTHUR Lopez, a citizen of the United States of America, residing in New York, in the borough of Manhattan, county and State of New York, have invented certain new and useful Improve ments in Type-Writing Machines, of which the following is specification.

This invention relates to an improved re versing device for the ribbons of typewriting machines, and more especially for the ribbons of Hammond typewriters, by which the motion of the ribbon is automatically reversed when unwound from one spool and rewound on the other spool so that the manual rewinding of the ribbon from one spool to the other is dispensed with; and for this purpose the invention consists of a reversing attachment fortypewriting machines which comprises two spools to which the ends of the ribbon are applied and a reversing gear located below the base-plate of the machine and adapted to be placed alternately into mesh with the shaft of the spools for revcrsing the motion of the ribbon.

The invention consists further of means applied to the spool of each ribbon and connected with the driving shaft of the reversing mechanism by means of a gravityrod which passes through the hollow shaft of the spool and engages a worm of the reversing shaft for prmlucing the automatical shifting of the reversing gear so that the ribbon is unwound from one spool and wound up on the other, or vice versa.

The invention consists further of certain details of construction which will be fully described hereinafter and finally pointed out in the claim.

In the acconqmnvi11;, drawings, Figure i. represents a plan-view of a Hammond type- Writing machine, with my improved ribbon reversing attachment, applied thereto, Fig. 2 is a front elevation partly in section through the baseilate, and showing the parts in position .or winding up the rib-- bon.,on the right hand spool, Fig. 3 is a similar section, showing the reversing attachment in position for winding up the ribbon on the left-hand spool. Figs. t and 5 are details, respectively on lines 4, 4, and 5, 5, Fig. 2, Fig. 6 is a detail section drawn on a larger scale through the center of one Specification of Letters Patent.

Patented Oct. 5, 1915.

Serial No. 687,671.

of the spools, and Fig. 7 a detail horizontal section on line 7, 7, Fig. 6.

Similar letters of reference indicate corresponding parts throughout the several figures of the drawings.

Referring to the drawings, a represents the left-hand and b the right hand spool of a typewriting machine, having two spools for winding the ribbon from one spool to the other. In the drawing the reversing device is shown as applied to 2. Hammond typewriting machine, but it is obvious that it can be used with any other machine using two spools. The spools a and b are placed on the upper ends of tubular vertical shafts S, S which turn in neck and step-bearings in the frame F of the machine. 'The shafts S, S are extended below the base-plate f of the machine and provided at their lower ends below the same with bevel gear-wheels g, g, the hubs of which are mounted on the lower ends of the tubular shafts S, S. Below the bevel gearwheels g, g and in a vertical plane passing through the axes of the spool-shafts S, S is arranged a horizontal reversing shaft S which is provided with a button (17 at one end. The reversing shaft S is supported in bearings of hangers d that are attached to the underside of the baseplate f, as shown clearly in Fig. 5, and which shaft is capable of being shifted therein for a short distance. ()n the shaft S are mounted bevel-pinions c, 0, one near the bevel gear-wheel g and the other near the bevel gear-wheel g, in such a manner that when the shaft S is shifted in its bearings toward the right the right hand bevel-pinion e meshes with the bevel gear-wheel g on the shaft of the right-hand spool, while when the reversing shaft S is shifted toward the left, the left hand bevel-pinion will be placed in mesh with the bevel gearwheel on the shaft of the left hand spool. For the purpose of securing the exact degree of shifting motion required for placing, either bevelpinion e or 6 into mesh with its bevel gear-wheel g or g the shaft S is provided with collars h, h near the hangers d, (l, which act as stops for arrest ing the motion of the shaft in one or the opposite direction. For preveutin the too easy shifting of the reversing sha t, a friction-device is employed in one of hangers g or y, which is shown in detail in Fin. and which consists of a springyactuated ball 'i, that is located in a socket J in the upper part of the bearings t or and adapted to engage one or the other of two annular grooves i which are arranged on the reversing; shaft so as to require a certain degree of force. for shifting the reversing shalt into bearings from on sid to th tuber and back again. I

The ribbon r, uhether of one wise. or a compound ribbon composed of two or more different colors, is attached at its ends to shells surrounding the spootshal'ts in the usual manner and then wound up for a. sufficient length around one of the spools. The winding of the ribbon r is accomplished simultaneously with the printing of the type by a lever-mechanism l opera ted by the typekevs so as to mpart to the reversing shaft S an intermittent; rotary motion by means of a pawl and ratchetnna'lianistn K, which is shown in detail in Fig. 4. The ratchetqvheel K is mounted on the reversing shaft so that a step-by-step rota zzy motion is giien to the reversing shaft by the actuation of the keys. which rotary motion the left. hand spool. i: i -l is transmitted by the bevel gear wheel trans mission ,1 or e, g to the shaft of the left or right-hand spool acelntling as: bevel geanwheel of one or the other 2: in mesh with the bevel-pinion at one or the. other end of the reverting shaft. The pawl is piv oted to one, arm of an traciliating lever Z operated by the keys so that at each depression of a key and the printing; a ty e cor-- responding herewith, the ribbon is mortal simultaneously in one. or the opposite direction according as either the bevel gearwheel of the left or right-hand spool o, or f is placed in mesh witl ithe bevel pinion on the left or right hand end of the re" ersing sha t t. \Vhen the ribbon is wound up to its full extent' on the right-handspool. the reversing shaft is shifted by hand from the position shown in Fig. 2 into the position shown in Fig. 3, so that the bevehpinion on the right shaft and the bevcl'p nion on the left. hand end of the'sliat't. placed in HIP-ill with the bevel geanwhrcl on the ieft hand pooi shaft whereby the motion oi the ribbon i and the same wound up on the tell ha iqmol. When tini'ib u'm i:- wound up rem-nine rt -it. that i pushed toward the bevel -pinion is place bevel gjear\\'hecl or shaft and the bevel-pint .nitii the 1 l wit n-tn l spots; on the tight band end of the shaft platein I with the bevel geanwhcel on the rig illini s-po l shaft and the rib wn hand, ag -n tin? 'ight hand spool. M; the rev. shaft always rotated in the satzze d rt-rtion, the

ratchet wheel K has to be made of suiiicient width so as to be always engaged by the pawl K regardless of the shifting motion of the shaft.

The ribbon can also be automatically re- \ersed without interrupting the working of the maehine. This is accomplished by inserting: into the tubular shafts S, S. of the rihboirspools vertical slide-rods r, 7", which are connected at their upper slotted ends with elbow levers 7* that are. tulcrumed to posts r in the cylindrical shell or bushing 1 of the spools, the uppe arms of the elbow-levers r projecting into a slot in the upper ends of the slide-rods r, 7". The lower end of each slide-rod, 1-, 1' projects below the bevel gear-wheel r/ or (1' at the lower end of' the spool-shaft S and engages by its pointed end a worm a: or w on the reversing sha ft S so that as soon as the ribbon is nearly unwound from one spool the tension of the ribbon on the lower arm of the fulcrumed elbow-lever is relieved, and the slide-rod 7' or 7" dropped by gravity with its pointed end into one of the convolutions of the worm v1: or to and the reversing shaft shifted by the action of the same and the intermittent. rotary motion imparted to the shaft by the pawl and ratchet mechanism, so that. one the bevel-pinions on the revt og shaft is placed into mesh with a bevel gear-wheel on the spool-shaft S or S while the lanetpinion at the other end of the reversing: shaft is moved out of mesh with the lJ(.\'l--Q'Q2ll'-\\l16l at the lower end of the other spool-shaft so as to produce the turnin, of the latter and the rewinding ot the ribbon on the empty spool. By the tension of the. ribbon which is being wound on the empty spool, the elbow lever fulcrumetlto the inner shell or bushing of the spool is pressed inwardly and thereby the slide-rodlitted so that its lower pointed end is moved out of engagement with the worm w or w on the reversing), shaft as shown at the left-hand side of Fig. 1. and at the right-hand side of Fig. 2. The automatic I -upping ol' the sliderods 'r, and the, engjaglcmcnt ot' the lower ends of the same with the comolutirms ot the worms w, w on the shaft of the reversing gear. produce the automatic reversing: of the windingyup motion ol the ribbon so that the same is unwound from the full spool and rewound on the empty spool and vice versa, without inter rupting: the working ot the machine and w it being noticed by the operator.

bon is wound up in a quicker effective manner from one spool to the other than by the manual working heretofore emplgyed.

I claim:

In a typewriting'machine, the combination with horizontally arranged ribbon spools having a central shell or bushing provided with a vertical slot therein, of vertical cylindrical spool-shafts extending within said bushings, the said shafts being provided with vertically disposed slots within said bushings, vertical slide-rods guided in said shafts and extending through the same within the said bushings, a horizontal shiftable reversing shaft supported in bearings on the base-plate of the machine, bevel gears on the reversing shaft, and bevel gears on the vertical shafts, adapted to be alternately engaged by the gears of the reversing shaft, worlns on the said shaft adapted to be engaged by the lower ends of the slide-rods,

elbow-levers fastened within the slots of the said bushings, one arm of. the said lever adapted to be held flush with the surface of worm-gear of the shiftable reversing shaft,

the weight of the said arm being adapted to cause the same to drop down into engagement with the said worm-gear upon release of the said elbow-lever by the ribbon, the engagement of the said rods with the respective worm-gears adapted to cause an alternate shifting of the said shiftable reversing shaft, to cause a reversal of the action of theribbon spools.

In testimony, that I claim the foregoing as my invention, I have signed my-name in presence of two subscrlbing witnesses.

ARTHUR LOPEZ.

Witnesses:

PAUL GOEPEL, JOHN MURTAGH.

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