US570158A - Type-writing machine - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1 W. 0. FARNUM. TYPE WRITING MACHINE.

No. 5'70,15s.- Patented Oct. 27,1896.

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2 M U N R A F mm W TYPE WRITING MACHINE.

No.-570,158. Patented Oct. 27, 1896.

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UNITED STATES PATENT OFFICE.

WILLIAM C. FARNUM, OF ARLINGTON, VERMONT.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 570,158, dated October 27, 1896.

Application filed March 19, 1895.

To all whom it may 0072007 71,.-

Be it known that I,WILLIAM O. FARNUM, a citizen of theUnit-ed States,residing at Arlington, in the county of Bennington and State of Vermont, have invented certain new and useful Improvements in Type-Writers, of which the following is a specification.

My invention relates to that class of typewriters in which are embodied the features of a traveling paper-carriage, a platen-roll mounted thereon around which the paper is carried, arranged to be swung transversely across the line of travel of the carriage, and a set of type-bars, each carrying a plurality of types.

The object of my invention is to provide means for swinging the platen-roll by the operation of levers or keys forming a part of the regular keyboard of the machine into the various positions required to be fairly struck by the respective types on the type-bars.

The invention is shown in the accompanying drawings, of which- Figure 1 is a plan view showing the carriage and the parts which cooperate to swing it at rest or in their normal position. Fig. 2 is a plan view of a portion of the platen-roll in the most elevated of its several possible positions, together with the arm by which it is swung. Fig. 3 is a plan View of a portion of the platen-roll in an intermediate position, together with the arm and lever by which it is swung. Fig. 4 is a side elevation of the machine. Fig. 5 is an end View of the carriage, the swinging arm and platen-roll being in the same positions as in Fig. 2. Fig. 6 is a partial elevation of the opposite end of the carriage, with the platen-roll in the same position as shown in Fig. 1. Fig. 7 is an elevation of the same end of the carriage as is shown in Fig. 6, with the platen-roll in the position shown in Fig. 3.

In the drawings the traveling carriage is shown at S, to two upright arms of which the platen-frame I is hung by means of the hangers K. The frame I is also partially carried by a pair of rolls X and Y, running on suitable tracks S and S on the carriage-frame S. The method of supporting the platen-roll is optional, however, and does not form a part of this invention, which pertains simply to the means for shifting and lifting the said platen-roll and its frame.

I11 Figs. 1 and 4 Wis the main frame of the type-writer. B is a rocking shaft with bearings at each end in the frame WV, and A A are two arms attached to the shaft, as shown, and forming at their outer ends keys which are located on opposite sides of the machine adjacent to the regular type-keyboard. Fixed to the shaft B, between its bearings, is an arm 0, with the bar or link D, hinged thereto by the pin 0. The link D is connected at its opposite end, by the pin 62, to an arm E of the upright shaft H, which shaft is supported by two bearings in the frame I. The shaft H is bent at its upper end to a horizontal position and into the form of an L, as shown, with the foot of the L depressed, thus forming at its end a downwardly-projecting finger. (Shown more clearly in Figs. 6 and 7.)

Mounted upon the top plate of the frame is a stud P, which forms a pivot for a shiftblock N, consisting of an upright hub having the projecting cap-plate '12 and shift-hook J. A roller 0 is carried between the plate a and hook J, against which the back edge of the platen-frame I bears under pressure of a spring in the roller-hanging mechanism provided for the purpose. The top plate 11 projects over the frame I, Fig. 1, and serves as a guide for the same. A stud Q forms a stop for the shift-block, against which the platen and hook J strike when forced back by the swinging platen-frame I. The shifting hook J projects outwardly and is adapted to be acted upon by the back of the finger h.

In Figs. 6 and 7 is shown a type-bar T in position against the platen-roll. This typebar carries a lower-case letter 6 and an upper-case letter t". In Fig. 6 is shown the position of the platen-roll when printing lowercase letters, which position of parts corresponds to that shown in the plan view, Fig. 1. This is the normal working position of the machine.

Pivoted to the lower end of the shaft H is a plate F, carrying a finger-knob f, to the lower end of which beneath the plate the end of a coiled spring G is attached by means of a screw g, the other end of said spring being attached to a leg of the frame \V, Fig. 4E.

Normally this spring and plate stand as in Fig. 1, with the upwardly-projecting lug U pressing against the arm E.

Fig. '7 shows the platen-roll in position. for printing upper-case letters and corresponds to that shown in the plan view, Fig. The change of shift from lower to upper case letters is accomplished by depressing the keyarm A, which, through the connecting-link D, swings the arm E, and by it the shaft and arm II, into the position shown in Fig. The back of the finger 7t on the end of the arm H presses during this movement against the shift-hook J,causin the same to swing around against the stud Q, thereby swinging the roller 0, and with it the platen-roll, into the position shown in Figs. 3 and 7 The removal of the pressure applied to the key A allows the spring G to return the parts to their normal or lower-ease position.

The platen-roll may be swung into or held in the upper-case position independently of the key depression by swinging the plate F by means of knob f around until the lug U strikes the arm E, as'in dotted lines, Fig. 3, when the tension of the spring G becomes ef fective to prevent the return of the arm H and roll L to their normal positions.

The shift-block N is located so that the roller 0 will bear against the traveling platenframe I directly opposite the printing-point of the type. This is to insure correct alinement of the printed letters, as any slight oscillation of the paper-roll, due to looseness or play existing in or between the movable carriage and frame of the machine, will, from the constant pressure of the platenframe I against the roller 0, take place about the roller 0 as a fulcrum, and practically will be nullified at the printing-point owing to its close proximity to the fulcrum or roller 0.

111 Fig. 5 the platen-roll L and its frame I are shown elevated, so that the portion of the platen-roll which has been underneath receiving the type-impressions is thrown up into view of the operator. The roll thus elevated is shown in dotted lines in Fig. 4:. This elevation of the platen-roll may be accom-' plished by the hand directly applied to any portion of the roll itself, or more conveniently by lifting one of the keys A A, as shown in dotted lines, Fig. 4, thus swinging the arm C and the connecting-link D, as shown.

The position assumed by the plate F, Fig. 1, and the arm II with the hook h when the keys A A are thus elevated, is shown in Fig. 2. In this movement the front or top face of the hook it impinges against the back bar of the platen-frame I and pushes the same forward, tilting it into the position shown in Fig. 5. The removal of the lifting force applied to the keyA allows the platen-roll to fall to its former position before lifting. This elevation of the platen-roll may be performed when the shifting arm F is in the dotted position shown in Fig. 3.

In this case the parts will pass,

during the swing of the arm II, in the direction indicated by the arrow, Fig. 3, through the normal position in Figs. 1 and a to the elevated one ofFigs. 2 and 5.

Having thus described my apparatus, I claim as my invention, and desire to secure by Letters Patent, the following:

1. In a type-writer the combination with a traveling and swinging paper-roll frame, of an oscillating shift-block adapted to be operated from the keyboard, and carryinga roller in contact with the traveling paper-roll frame, and a vertical shaft which is interposed between the keyboard and the shifting-block and provided with a rigid horizontally-bent hooked end for engaging the said shiftingblock substantially as specified.

2. The combination with a traveling and swinging platen carriage of an oscillating shift-block a cooperating arm a shaft with which it is rigid and means connected therewith for swinging it about a perpendicular axis whereby said block may be operated by the depression of one of the keys, substantially as specified.

3. The transversely-movable paper-holder of a type-writer and a pivoted shift-block arranged to shift the position of said holder, in combination with 'an arm having a downwardly and rearwardly inclined finger, ar-

ranged to move the saidshift-block when the said finger is depressed a rock-shaft carrying the said arm, and one or more keys and intervening devices for rocking the said shaft and thereby depressing the said arm and tinger, substantially as set forth.

4. The combination of a rock-shaft with a swinging arm, a key-shaft, direct crank c011- nections between the said rock-shaft and the said key-shaft, and one or more'keys attached to said key-shaft so arranged that the lifting of said keys will cause the said swinging arm to move forwardly and raise the paper-h older, and the depression of said ke s will cause the said swinging arm to move backwardly and operate a carriage shift-block, substantially as specified.

5. In combination with a movable platenroll, a pivoted shifting-block provided with a roll arranged to bear against an attachment of said platen-roll, said block having also a projecting hook J, an arm H, bent into hook form and provided with a terminal finger h, and meansfor rocking the said arm about an axis so as to make the said finger engage and operate the said hook, thereby moving the said platen-roll in order that it may be in position for the printing of the upper or the lower case of type substantially as set forth.

In testimony whereof I have hereto subscribed my name this 16th day of March, 1895.

\VILLIAM C. FARNUM.

In presence of- FRANKLIN Soorr, EMILY Soor'r.

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