US423900A

US423900A - Type-writing machine

Info

Publication number: US423900A
Authority: US
Publication date: 1890-03-25
Anticipated expiration: 1907-03-25

Description

(No Model.) a Sheets-Sheet 1. B. ,A. BROOKS.

TYPE WRITING MACHINE.

No. 423,900. Patented Mar. 25, 1890.

N.'FETRS. Phokruthognphor, Wnhingfcn, D. C.

-3 Sheets-Sheet 2.

(No Model.)

B. A. BROOKS TYPE WRITING MACHINE.

N0. 423,900. Patented Mar. 25, 1890 W mses:

n wmin mn. D. C.

3 Sheets-Sheet 3.

B. A. BROOKS..- TYPE WRITING MACHINE.

(No Model.)

Patented Mar..25. 1890.

Ewen/Z02".

N. PETERS. PhollrLilhn rzphan wuhin mn. D.c.

UNITED STATES BYRON A. BROOKS, OF B TYPE-WRITIN ROOKLYN, NEYV YORK.

G MACHINE.

SPECIFICATION forming part of Letters Patent No. 423,900, dated March 25, 1890. Application filed May 19, 1884. Serial No. 131,967. (No model.)

To aZZ whom it may concern:

Be it known that I, BYRON A. BROOKS, a citizen of the United States, residing in Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Type-WVriting Machines, of which the following is a description in such full, clear, concise, and exact terms as to en able any one skilled in the art to which my invention belongs 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.

My invention consists of certain novel parts and combinations of parts constituting an lmproved type-writer. The points of novelty will be designated in the claims concluding this specification.

Similar letters and figures of reference indicate corresponding parts in all the figures.

Figure l is a side view of my improved machine. Fig. 2 is a top View, and Fig. 3 a front view, of the same. FigS.4 and 5 are respectively side and front views, partly in section, of my improved type-bars.

Referring to Fig. 1, O is one of a series of bell-crank levers carrying the types a b c and pivoted to oscillating or vibrating bellcrank levers A, set in the arc of a circle, and which in turn are pivoted on frame h and are provided with the projections g.

A are a series of key-levers set in the frame B and fulcrumed at q, the rear ends of each of which levers are connected by springs cl and rods 6, respectively, to lever-arms E and D of the aforesaid bell-crank levers.

y is a stop-piece formed into steps 1, 2, and 3, having a vertical movement imparted to it by the levers B. The stop 3 being in the position illustrated in the drawings, Fig. 1, when the key A is depressed the projection g on the leverAE by means of spring d is pressed against the step 1, and the type-bar O D by means of rod e is thrown down to print the let ter a. When the stop 3 is raised into the second position, the projection g is thrown forward against the stop 2 and the letter b is printed, and when the stop is raised to the third position the projection is thrown forward against the stop 3 and the letter 0 is printed.

My present form of type-writer may be arranged to print directly from the type without the use of an inking-ribbon, and in the drawings I have illustrated one means of automatically inking the type for this purpose.

O is a pad or roller, which may be supplied with ink by intermediate rollers or in any well-known manner. It is connected by the bent rod 0 with a rotary cam H, against which the end of the rod G bears, which rod is pivoted to the frame B at s and is actuated by a lever-arm connected to the spacingkey D of the machine. Each time, therefore, the key D is depressed the inking roller or pad passes over or is pressed against the face of all the types, and returns to the position illustrated in the drawings by the action of a spring H, connected to the cam H. The projection 0 from the rod O" immediately beneath the ink-roll indicates the position of a distributing-roller bearing against said ink-roll for the purpose of supplying and distributing ink evenly thereon.

The bars 2' 71, Figs. 1 and 3, are tracks upon which the platen-carriage slides. This carriage holds the pivoted cylindrical platen E and the device for revolving the same upon its axis. The platen-carriage is free to move longitudinally upon the bars '6 2 said longitudinal movement being imparted by the rack 7t 70, connected thereto, in combination with the revolving screw j, mounted upon the shaft 0, which is in turn actuated by means of a ratchet-wheel h and pawl q, (see Fig. 1,) carried by the pivoted lever 3, connected by arm a to bar I, pivoted at one end to the frame of the machine and actuated by the vertical movement of the bar 25, attached thereto. The bar 15 is provided with a series of setscrews 1' 0', one for each key-lever A, as shown in Fig. 3. These key-bars A each have a given vertical movement, and it will be readily seen. that the distance the bar 15 rises when a given lever A is actuated, and therefore the lateral motion imparted to the platen E, may be governed by the adjustment of these set-screws. This device is for the purpose of regulating the spaces between the impressions of the type and to .impart the amount of lateral motion to the platen necessary to insure an equal space between each two letters, whether the letter be broad or narrow. The descent of the bar tis quickened by the springs I I. A spring pulleydrum Z, tending to draw the platen-carriage toward the left hand to facilitate the horizontal movement of the platen in spacing, may be employed, said tendency, however, being resisted by the serewj while it remains at rest. The revolution of the serewj may be reversed to draw the platen-carriage toward the right hand by means of a string 11, attached to the shaft 0. This string may be combined with a pawl, ratchet-wheel, and spring to immediately draw it toward. the cylinder when released. The pawl q is raised to allow the ratchet-wheel 71 to be turned back by means of a pin projecting from the pivoted arm J, through one end of which the string it passes in an inclined friction-slot m, thereby raisingthe said pawl when the string is drawn outward. Other devices well known in the arts operating to raise the pawl to allow the worm-wheel to revolve in the opposite direction may be employed without altering the principle or function of the combination.

The platen E is provided with a ratchetwheel and a lever 1 pivoted on the platenshaft carrying the paw .2, which engages with the said ratchet-wheel. This lever is provided with a spring, which tends to turn it with a right-hand revolution upon its axis. The lower arm of the lever y rests on ahorizontal bar 13, tapered at one end, (see Fig. 1,) which gives to the lever 1 a reciprocating or vibrating motion each time the platen is moved horizontally to and from. the extreme left position, thereby automatically (by means of the said ratchet-wheel and pawl) revolving the platen on its axis through a given are to space between. lines of print when the platen moves from its extreme left position toward the right.

The form of type-bar I prefer to use in my machine is illustrated in detail in Figs. 4. and 5. It consists of a thin piece of metal set on ashort pivot, about which it revolves. About the pivot-point I provide the bar with bearing-surfaces parallel with the plane of vibration of the type-bar to prevent lateral vibration. Both parts of my compound type-bar should be made of such thin pieces of metal, and both pivots, as illustrated at F, Fig. 5; but in such IigureI have illustrated only the upper or type-bearing section of the bar.

One of the objects attained in the machine which is the subject-matter of these Letters Patent is that the printing as it progresses is constantly in sight of the operator. To accomplish this, the type-bars must be set to strike on top of the platen and cannot be distributed throughout the entire circumference of a circle. The type-bars must therefore be made thin to economize space. For the same purpose the standards to which the bars are pivoted must also be thin.

The paper which receives the impression of the type enters above the guide '1', passes between the platen and guide-wheel F, then between the platen and guide-wheel F, and then out between the guides 1' and u. Upon the back end of the bars sis attached a spring 0', which rests upon the periphery of the wheel 71 when the bar 8 is in the position shown. \Vhen the said bar is turned with a righthand revolution about its axis,the sprin ois raised out of connection with wheel IL. This spring acts as a brake upon the revolution of the wheel h to prevent the momentum of said wheel carrying it too far when operated by the throw of the pawl q, and, being raised out of connection with the wheel 72. when the pawl q is slipping over the ratchetteeth on said wheel, avoids waste of force.

I do not herein claim, in a type-writing machine, the combination of a type-bar, a v1- brating support to whichit is pivoted, and a key-lever carrying a rod attached to sa1d lceylever and to said type-bar, as such subgectmatter is covered by a pending application filed March 23, 1886, Serial No. 196,215.

IIavin g thus described my invention, I claim and desire to secure by Letters Patcnt- 1. In a typeavriting machine, the combination of the adjustable stop-piece and a typeba-r consisting of two bell-crank levers, one being pivoted to a stationary support and provided with a stop projection, and the other being pivoted to the last-mentioned lever and carrying the types, and both being connected to and operated by a key-lever, substantially as described.

2. In a typeavritingmachine, the combination, with the platen-carriage, ot' a rack and worin-wheel engaging therewith to move sa1d carriage longitudinally in both directions by the right-hand and left-hand revolution of said wormdvheel, and a ratchet-wheel, pawl, and pulley attached to the worm-wheel shaft to control the motion of said worm-wheel, said pawl being raised out of contact with its ratehet-wheel automatically by means substantially as described when the revolution of the ratchet-wheel is reversed to draw the platen back.

3. In a type-writing machine, and in combination with the platen-carriage, a springdruin, rack, screw, pawl and ratchet to revolve said screw, and a spacing-bar connected to the pawl, substantially as described.

4. In a typewriting machine, the combination, with the platen E, friction-rollers F and F, and guides 11 and it, between which guides the paper to be printed on enters, and on top of which the paper, afterit has received the impression of the type, returns, substantially as described.

5. In a type-writing machine, in combination with a type-bar bearing two or more types, a rod a bell-crank lever A E, provided with stop g, stop-piece y, spring (I, and key-lever A, by means of which the movement of the type-bar is governed to print its several types, substantially as described.

6. In a type-writing machine, the combination of a bell-crank lever A E, to which the bar carrying the types is pivoted, rod e, stop y, spring d, key-lever A, and longitudinallytraveling platen E, with type-bars set in the arc of a circle, each carrying two or more types set in the line of the radius of said circle and arranged to reciprocate therein, substantially as described.

7. In a type-Writing machine, a carriagesupport consisting of tracks on which the carriage runs, combined with standards attached to the frame of said machine and curved so as to provide a support both above and below said platen and be entirely out of the pathof said carriage; so that the end of said carriage may travel beyond the curved standards, substantially as described. v p

8. In a type-writing machine, an inkingpad, combined with and operated by the keylever by which spacing between words is accomplished, substantially as described. BYRON A. BROOKS. Witnesses:

EDGAR BULL, WM. H. BROADNAX.