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Publication numberUS274262 A
Publication typeGrant
Publication dateMar 20, 1883
Filing dateApr 19, 1882
Publication numberUS 274262 A, US 274262A, US-A-274262, US274262 A, US274262A
InventorsByron A. Bkooks
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 274262 A
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Description  (OCR text may contain errors)

4 Sheets-Sheet 1.

(No Model.)


Patented M21220, 1883.

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N. PETERS. pbwmiw m. Wam m n. c

(No Model.) {sheets-sheet 2.


"TPYE WRITING MACHINE. No. 274,262. Patented M a,r.20, 1883.

N. PEI'ERS. Phmn-Lithem ber. Washinglom 5.6.

(No Model.) 4 Sheets-Sh:et.4;


TTPYE WRiTING MAGHiNE. No. 274.262. Patented Mar. 20,1883.

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sPEoImoA'rroN formingpart of Letters Patent No. 274,262, dated March 20, 1883.

Application filed April 19, 1882. (No model.)

To all whom it may concern i i Be it known that I, BYRON A. BROOKS, of

the city,;count-y, and State of New York, have invented certain new and useful Improvements in Type-Writing Machines, of which the following is a description in such full, clear, and exact terms as to. enable any one skilled in the arts to which said invention appertains, or with which it is most nearly connected, to make and use the same, reference being had to the accompanying drawings, making part of this specification, and to the letters and figures of reference marked thereon. l

Figure 1 of said drawings is;a'top view of a machine embodying my invention; Fig. 2, a

3 rear elevation, partly in section, of the same;

Fig. 3, a cross-section on the line to a"; and

Figs. 4 and 5, detail parts to be hereinafter described.

My invention appertains to that class of type-writers known as wheel-machines, operated by a power independent of the keys, the 'keys being usedim erely to initiate the action j 3, of the particular part of the machine intended to actuate the type to be printed from.

The invention consists of a novel combination of mechanical devices with'reference to each other and their relative action for the purpose of improving this variety of machines.

The construction, organization, and operation of themachine are as follows:

Reference being had -to the drawings, A is the frame of the machine, in each end of which a strong journal-stud, Z, is securely fixed. Upon each of these studs a vibrating beam, E, is hung in the center, the top ends beingunited by meansof a beam, B, and also by a shaft, 0, upon which the type-wheels Dare carried. The lower ends of these vibrating beams are united by a shaft, X, upon which a series of cams are mounted, corresponding in number to the type and keys, and bywhich the typewheels are actuated through the instrumentality of the keys, as will presently appear. When the machine is in operation the cam-, shaft X and the type-shaft O are in continual motion. They both revolve around their respective axes in the same direction, both shafts being actuated by an intermediate cog-wheehj", carried by the stud Z, said intermediate wheel gearing in a corresponding cog-wheel, f, on the shaft G and in a similar wheel, f, on the shaft X, the power to drive the wheels and shafts being applied to the pulley r. The shafts O and X have not only a rotating motion when the machine is in operation, but also a vibratory motion,the beam E vibrating continually upon its center Z. The vibrating movement of the beam E is occasioned by means of the cams c on the shaft X, each of these cams being made to ride upon an inclined plane, 6, made upon the face ofa lever, b, corresponding to each cam on the shaft. The lower end of each of the levers b is held in a suitable journal-box, e, set in the frame of the machine. The vibrating motion of the beam E and the machinery carried by it is initiated by the key-levers a, the fulcrums of which are at (1. These key-levers have upon their inner ends a roller, a, that acts against the under side of each of the levers 1) corresponding to the several key-levers.

When the machine is in action,and it is de' sired to cause any particular type on the wheel D to strike down on the platen K, the outer end of the key-lever corresponding to that particular type is depressed, by which the projecting catch on the upper end of the lever 11 isthrown in gear with the shoulder t' on the under side of the lever d, of which there is one to correspond with every lever b. By these means the camsc are brought into contact with the inclined plane 0 on the lever b, by which the lower end of the beam E is thrown up and its upper end down, causing the type set to correspond with that cam to strike the top of the platen K and leave its impression upon or in the paper or matter being acted upon. As

soon as the type has made its impression, the

cam, by the continuation of its motion, is brought against the lower end of the pin it, set

in the lever b, by which the pin is driven forward against the lever d, detaching it from the lever 11, allowing the latter to fall to its normal position, the lever to falling as soon as the lever b is raised to gear with lever cl.

It will of'course be understood that for every type there is a leven, a, b, and d, and a cam, c, all of which are set in their right relation to each other, and every one of which is separately acted upon in the manner I have described.

By means of these devices, combined and operated as described, I obtain the rotating and-dropping motion of the type above the platen K, upon which the printing is done. To obtain the lateral motion of the platen, by which the paper is carried forward with the type, I place on the shaft C,at the side of the type-wheels, a ratchet-wheel, l, and on the platen a corresponding projection, t, upon which a tooth in the ratchet-wheel locks the instant the type strikes the paper and carries the platen forward with the type against a spring during its contact with the paper, the spring (not shown in the drawings) forcing the platen back to its normal position the mo- I ment the type is raised from the platen. The

fixed on the shaft X.

paper is shown in the drawings by g. It is cut in narrow strips and passes over the platen under the type-wheel and under a cleat, J, placed over a slot out in the platen just in front of the point of contact between the type and the platen. In this slot a pawl, m, having a serrated edge, is made to work. The office of this pawl is to catch the paper and hold it from falling back with the reverse motion of the platen. In addition to its office of holding the paper from falling back with the platen, the pawl performs also the office of adjusting the paper in its right relation to each individual type. This it does by a variable motion imparted to it by means of a toothed wheel, n, The teeth a of this wheel are of varying lengths, and act on a pin, 0, setin the end of the lever o. This lever is in the form of a bell-crank, (see Fig. 4,) pivoted at s, the inner end being connected by means of a link, r, pivoted at s to the pawl m, while the outer end rides against the teeth a of the wheel 12, and these teeth being of unequal lengths give the pawl a varying motion.

' The lengths of the teeth in the wheel n are adjusted with reference to the type on the wheel D, the teeth being made long or short accordingly as "the type are wide or narrow for the purpose of regulating, through the instrumentality of the pawl, the distance the paper shall fall back with the platen and by that means the equal space between the print of the several type. 5

Having thus provided a variable motion of the pawl m to regulate the space between the type-impressions,I proceed to provide a lateral motion of the type-wheel for the purpose of throwing the rows of type 1 2 3 to the right or left to bring them in their right relation to the printing-point over the platen. This motion is obtained by means of the key-levers B B, Figs. 1 and 4, connected to a shiftingclutch, 0", through the rods H and lever I. The clutch 0 is on-the end of a lever, 0', that embraces the stud Z. The relation and operation of the parts are as follows:

The yoke 0, Fig. 4, is fitted with pins 12 'u,

and embraces a groove out in a loose sleeve, 0", on the shaft X. The yoke that embraces the stud Z is also fitted with pins 2:, that set into suitable hearings in the stud, leaving both ends of the lever free to vibrate upo the pins 12 as a center. Now, the pins 1 rid in a groove cut in the huh I of the cam-wheel F, and the lever I is fitted snugly on the square pin it, so that by operating the levers B B the lever 0" is made to vibrate on the pins 2), and throw the shaft 0, carrying the type'wheels, to the right or left, as the case may be. In this operation it will of course be understood that the shaft 0 can slide lat-j erally as well as rotate inits bearings, and that the grooved cam-wheel F and its hub l, are fixed to the shaft, thus'giving the lever c the control of the lateral motion of the shaft 0.

It will be seen that by the above-described arrangement the clutch 0 is thrown to the right or left by depressing one or the other of the levers'B B, thus moving the type wheels to the right or left of the printingpoint on the platen. Now, to bring the type wheel back to its normal position the instant the side type has left its impression, a springcam, G, is provided to work-in the grooved cam-wheel F. This cam is stationary, and is held by a spring-lever, G, bolted to the crosspiece B. When the type-wheel is in its normal or central position the cam rides in the center of the groove; but when the lever c throws the type-wheel to the right or left it does so against the energy of the spring G, by which means the instant the lever B is released the type-wheel is thrown back to its normal position.

The machine is designed to print upon paper or in any suitable soft, yielding, or plastic substance into which the type can be made to leave its form, as in the case of a mold from which a stereotype plate or form may be cast.

- Having thus described my improved typewriter,I claim as new and as my invention the following features: 1. In a type-writing machine, the combina-v tion of a series of key-levers, a, a series of cams, 0, upon a rotating shaft, and a series of intervening cam-levers, b, and hook-levers d, the several parts coacting, substantially as described, for the purpose specified.

2. In a type-writing machine, the combination of a type-wheel shaft, 0, a pair of vibrating beams, E, and a cam-shaft, X, carrying a series of cams, 0,,the several parts coacting,substantially as described, for the purpose specified.

3. In a type-writing machine, the combination of a wheel, it, provided with teeth of unequal lengths, a cam-shaft, X, a reciprocating platen, K, a pawl, m, a jointed intervening lever, r, connecting the tooth-wheel and pawl, anotched wheel, 1, rotating with the typewheel,anda projecting catch,t,on the platen,

i y I the several parts coacting, substantially as described, for the purpose specified.

4. In a type-writing machine, the combina- 5 tion of a vibrating lever, 0', a yoke, O, on the main shaft X, a type-wheel shaft, 0', arranged to move laterally, a pair of operating-levers, B, and intervening connecting-rods H, the severalparts, coacting substantially as described.

I0 5. In a type-writing machine, the combination of a seriesof'i detached key-levers, a, with, aseries of detached cam-levers, b, anda series of cams, a, coacting, as described, for the purpose of initiating the printing operation of the machine.



Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3362517 *May 5, 1966Jan 9, 1968Mattel IncImprinting mechanism using rotational inertia to move type to printing position
US7818069 *Jul 27, 2007Oct 19, 2010Cyberonics, Inc.Ribbon electrode
Cooperative ClassificationB41J7/32