US721392A - Type-writing machine. - Google Patents

Description

No. 721,392. g PATENTED FEB. 24, 1903.

W.C. RICHARDSON.

TYPE WRITING MACHINE. APPLICATION IILED MAY 17, 1902.

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"No. 721,392. I I PATBNTED FEB. 24, 1903.

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TYPE WRITING MACHINE. APPLICATION FILED MA-Y 17, 1902.

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No. 721,392. PATENTED FEB. 24,-19'03.

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TYPE WRITING MACHINE.

APPLICATION FILED MAY 17, 1902.

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PAT-ENTED FEB. 24, "1903.

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Wit r1555 25 Att'urrleys UNITED STATE WILLIAM C. RICHARDSON,

OF MYsT-IC, CONNECTICUT.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 721,392, dated February 24, 1903.

Application filed May 17, 1902.

To all whom it may concern:

Be it known that I, WILLIAM C. RICHARD- SON,a citizen of the United States, residing in Mystic, county of New London, State of Connecticut, have invented a new and useful Improvement in Type-Writing Machines, of which the following is a specification.

My invention relates to improvements in type-writing machines in which key-levers operate in conjunction with selecting means and printing means; and the objects of my improvement are, first, to provide a simple and compact structure; second, to reduce the number of parts, and, third-,to attain a positive positioning of the printing means, followed by a positive movement of said" means to produce an impression. I attain these objects by'the mechanism illustrated in theac--- companying drawings, in which- Figure 1 is a side elevation of-the'entire machine. Fig. 2 is a top plan view of the machine. Fig. 3 is avertical section onlthe line 2 2 of Fig. 2. Fig. 4 is a rear elevation showing also a view of a modified form ofselecting and printing bail. Fig. 5 is a detail view of the operating mechanism. with the platen and its carriage removed. Fig. 6 illustrates a modification of the operating mechanism for the printing means. Fig. 7 is a sideele vation of the same.

Similar letters refer to similar parts throughout the several views.

The base A is provided on each side with the standards A, in which is mounted the cross-bar A Standards A are located at the forward end of the base A and supporta pivotbar A Upon the pivot-bar A are preferably mounted the type-operating bail O and the selecting and printing bail B. Also preferably mounted on the cross-bar A are the key-levers D, provided with the keys D. Itis obvious, however, that the parts B, C, and D may be mounted upon difierent Centers with out departing from the spirit of my invention, it being only necessary that the key-1e vers D contact both with the operating-bail C and the print-ing and selecting bail B to depress the same. I The bails B and O and the type-leVersD are norm'ally'held in raised position by springs 19, c, and d, which are suspended from the cross-bar A mounted in standards A of the base A. A suitable abut- Serial No. 107,870. (No model.)

These stop-surfaces are formed at dilferent heights either in the manner shown in Fig. 5 or in Fig. at. These stop-surfaces determine the extent of depression of the key-levers, and consequently the movement of the operatingbail C, and this in turn determines the amount of movement to be given to the printing mechanism proper. Each of the groups of steps or stop-surfaces on the member B is so arranged that none of the stop-surfaces of one group exactly correspond to any of the stopsurfaces of the other groups. In other words, the ditferentiations in the levels of the stopsurfaces, while so slight as to not be readily illustrated'in the drawings, are nevertheless well defined and are so arranged as to permit of a different printing position of thetypewheel forjeach key-lever contacting therewith. The type-operating bail Q is provided with astandard Ci, having a bent portion at its upper end, upon which are formed ratchetteeth 0 "These teeth engage a'gear-wheel E on the shaft Eof the type-wheel E. At the rear-of the machine,below the type-wheel,

is mounted the carriage mechanism, as shown in Figs. 1, 2, 3, and.4.', said carriage mechanism .being provided with suitable shift and feed mechanism.

'By referring to Fig. 5 it will be seen that the operation of my improved type-writer is as follows: Upon depressing a key-lever D by means of the key D said lever engages the cross-bar of the bail O, depressingthe same, causing the gear-teeth O to engage the gear E Further depression of the lever D causes the type-wheel E to rotate until said lever D contacts with the stop in the bail B, when upon further depression of said key-lever D the type-wheel contacts with the platen G and makes the impression. Upon releasing the key-lever D the parts resume their normal ICO raised position by reason of the springs 19, c, and d.

In the operation of the preferable form of mechanism shown it is to be noted that inasmuch as the parts B, C, and D are mounted upon the same center there will be no rubbing friction between the key-leverI) and the bails B and C; but the parts will directly contact, and consequently there will be substantially no Wear between the part D and the parts 13 and (J.

In Figs. 6 and 7 is shown a modification-of the operating part 0. In this construction instead of the bail C the machine is provided with a bar 0, preferably mounted at one end upon the cross-bar A and having a standard 0, provided with a grooved segmental portion 0 At the lower extremity of this segmental portion is attached a cord F, which passes around and is fastened at one end to a pulley E corresponding to the gear E of Fig. 5. Laterally projecting arms (J are mounted upon either side of said standard C. These arms provide contact means for the key-levers D, corresponding to the crossbar of the bail G. Many modifications of the parts of my device may be made Without departing from the spirit of my invention.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. In a type-Writing machine, an oscillating member; printing mechanism mounted on said member; a second oscillating member; means on said second member to position the printing mechanism; keylevers pivotally mounted and arranged to directly contact with and oscillate said members when depressed.

2. In atype-writing machine, an oscillating member; printing mechanism mounted on said member; stop-surfaces on said member; a second oscillating member; means on said second member to position the printing mechanism; key-levers pivotally mounted and arwhen depressed; said members and key-levers being pivoted concentrically.

4.. In a type-Writing machine, the oscillating member; printing mechanism mounted on said member; a second oscillating member; means on said member to position the printing mechanism; key-levers pivotally mounted and arranged to directly contact with and oscillate said members when depressed; and means to hold said members and key-levers normally raised.

5. In a type-writing machine, a base; a pivot-bar mounted in said base; a printing and selecting bail mounted on said bar; printing mechanism on said bail; a second bail mounted on said bar; means on said bail to position said printing mechanism; key-levers mounted on said pivot-bar to operate said bails.

In testimony whereof I have hereunto set my hand, in the presence of two witnesses, at Boston, in the county of SuEolk, State of Massachusetts, this 10th day of May, A. D.

WILLIAM C. RICHARDSON. Witnesses:

RICHARD P. ELLIOTT, H. M. KELso.

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