US499263A - Type-writing machine - Google Patents

Description

(No Model.)

D. .H. TAYLOR. TYPE WRITING MACHINE.

No. 499,263. Patented June 13, 1893.

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UNITED STATES PATENT OFF CE.

DAVID H. TAYLOR, OF CINCINNATI, OHIO.

TYPE-WRITING MACHIN E.

SPECIFICATION forming part of Letters Patent No. 499,263, dated June 13, 1893.

Application filed January 28, 1893. Serial No. 459,988. (No model.)

To all whom it may concern.-

Be it known that I, DAVID H. TAYLOR, a citizen of the United States, residing at Cincinnati,in the county of Hamilton and State of Ohio, have invented a certain new and useful Universal Carriage-Release for Type-Writing Machines; and I dordeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

This invention relates to improvements in attachments for type-writing machines, the purpose of which is to provide means whereby the carriage carrying the printing cylinder may be rapidly moved either way, but particularly from right to left, and through a larger distance at a time than the ordinary spacing mechanism permits, which latter releases the carriage only to the extent of the space which one letter requires.

In type-writers as they are now mostly constructed, the carriage supporting the printing cylinder is provided with a rack which moves with it and has teeth corresponding with the space occupied by one letter. It travels on ways orguide-rods and is advanced from right to'left, during the operation of the machine by the action of a main-spring. A vibrating stationary pawl or escapement-dog engages normally with the rack before mentioned and is temporarily disengaged therefrom with each operation of a key, for the purpose of spacing or printing a letter, so that the rack respectively the carriage and printing cylinder ad- Vance the space of one of the rack-teeth at a time. At the end of each key-action this dog springs quicklyinto place, to engage with the next rack-tooth and thereby arrests the action of the main-spring for the time being, and its tendency which is to move the carriage at once through the whole distance of its path. If it is desirable to advance the carriage at once through a larger distance at one time than the escapement-dog permits, the disengagement of this latter from the rack has to be extended for a correspondingly longer time. To make such rapid advance possible without using the ordinary. space mechanism, wherewith it could only be attained by operating it a sufficient number of times until the distance is covered, special attachments have been provided whereby the escapement-dog is released from the carriagerack and held out of engagement until the carriage, which may now be freely moved either way, has been adjusted-to the desired position.

The object of my invention is to provide such an attachment and construct it in a manner to adapt it for connection and use on a socalled Densmore-type-writer.

A further object is to construct this attachment integrally of one piece of metal having the required shape, whereby great simplicity and cheapness of manufacture are attained.

In the following specification and particularly pointed out in the claims, is found a full description of my invention, its operation, parts and construction, which latter is also illustrated in the accompanying drawings, in which Figure 1 shows a top view of the carriage of a type-writer with my attachment in position,

and showing also an inferior attachment in use now for accomplishing the same purpose. Fig. 2 is an end elevation of Fig. 1 respectively of the left side of the carriage as viewed from the operator when in position for work before the type-writer. Fig. 3 is a rear elevation of the parts shown in Fig.1 respectively of a type-writer,with my attachment applied. Figs. 4, 5, and 6 are views corresponding substantially with Figs-2, 3 and 1, showing however my attachment in a modified form.

Referring to the drawings, 10 indicatesthe printing cylinder or platen, of a Densmore type-writer and 11 the frame or carriage which supports it. The carriage travels on guide- rods 12 and 13, and carries with it the paper-table 14 and rack-frame 15, to the under side of which the rack 16, connects. By reason of this connection this rack-frame becomes virtually a part of carriage 11, and platen 10, as far as the movement of these parts is concerned. This movement is obtained by a main-spring (not shown) con-- tained in a housing 17, and connected to the rack by a flexible connection 18. The further description of any of the other appendages of the carriage is deemed unnecessary for the purposes here in view.

19 is the escapement dog. It vibrates vertically, being pivoted at 20, and connects by a rod 21, to the key-mechanism, so that with every operation of any of the keys and by reason of its specific construction it permits the rack respectively the carriage, to advance one tooth at a time, which is equivalent to the space a letter requires.

To permit the carriage to be released for the rapid advancement previously mentioned and often needed, these machines are provided with an attachment consisting of an operating lever 22, and lever 23, each pivoted to the main frame, and link 24, which connects to a vertical rod-shaft 25, supported within a housing 26, and forming part of a general frame 27. The upper end of this rod-shaft forms the bearing for pivot 20, of dog 19, and .is also provided with a flange 28, to keep in position within its housing. It is capable of rotation in a horizontal plane within this latter, so that when lever 22, is depressed, it will by reason of lever 23 and link 24:, rotate slightly, but sufficiently to swing dog 19, out of engagement with the rack whereby this latter with the carriage becomes free and may be moved in either direction. This condition remains as long as the action on lever 22 is continued, after which, when said lever is released, dog 19, springs back to its normal engagement with rack 16, which re-enga-geinent is caused bya spring contained in housing 26, and acting upon rod-shaft 25. Net ther of these parts are of my invention, but inasmuch as they are operatively connected to my attachment, their description is necessary. Lovers 22 and 23, being stationary fixtures and secured to the main frame, it requires two hands to manipulate this device and to hold, respectively move the carriage, whereby all the objections previously stated arise. These objections are overcome by my improved attachment where the operating lever 29, corresponding with lever 22 in the old attachment, is carried by the carriage or by elements being parts or moving with the same. This lever connects to a rocker-bar 30, provided with arms 31, by which it is pivoted to the rack-frame at 32. This bar, while moving with the carriage, remains at the same time and in all its positions in operative connection with dog 19, for the purpose of disengaging this latter from rack 16, at any point of the path during which the carriage travels.

The operative'connection between bar 30, and dog 19, may be accomplished in different ways, all of which accomplish the same result as long as they act upon said dog for the purposes desired. In my preferred form I use an upright pin 33, preferably provided with a roller 34, to reduce friction. It connects mediately to dog 19, by being connected to flange 28, of rod-shaft 25, which carries the dog. In its position this pin closely approaches bar 30, so that if this latter swings up and outwardly on its pivots 32, by reason of an operative depression of lever 29, it immediately affects such pin and through it dog 19, which liberates rack 16. The carriage with its printing cylinder becomes now free and may, by reason of the location of lever 29, be readily and conveniently moved by the same hand which operates said lever. This convenience of access remains also the same if the platen respectively its carriage, is raised to inspect the writing or for other purposes.

The operative connection between bar 30 and dog 19, may be modified as shown in Figs. 4, 5 and 6 where a hook-shaped lever 35 takes the place of pin 33. This lever is hinged at 36 to the frame, and connects byalink 37, direct to the escapement dog 19. The efiect on the dog, when lever 29 is depressed, is the same as in the other case. Bar 30, when rising pushes lever 35, outwardly by acting upon its hook-shaped part and through the intervention of link 37, pulls dog 19 out of engagement with the rack. A spring 38, may be applied to return lever 35 and cause it to follow bar 30, when this latter is lowering after lever 29 is released. Parts of these two forms shown might be interchanged and further modifications produced. For instance pin 33 of the first form shown might be connected directly to dog 19. Again, link 37 of the second form instead of connecting direct to dog 19, might connect to a projection secured to flange 28, of rod-shaft 25, similar as shown in the first form.

I do not broadly claim the combination with the carriage or platen of any type-writer, of an attachment of the kind and purpose described. I do claim however an attachment for such purpose and constructed substantially as shown to make it adaptable to Densmore type-writers.

Having described my invention, I claim as new- The combination with the carriage rackframe 15 of a type-writer and the escapementdog 19, capable of oscillating in a horizontal and vertical plane, of bearings 32, provided on frame 15, a rocker-bar 30, having the integral arms 31, whereby it is secured to bearings 32, one of said arms being longer and bent laterally and extended to the front where it forms the operating lever 29, and means connected to dog 19, and extending within the path of the motion of bar 30, whereby this latter causes the former to oscillate horizontally for the purpose of releasing the carriage. In testimony whereof I afiix my signature in presence of two witnesses.

DAVID II. TAYLOR.

Witnesses:

HENRY I-I. GRANT, O. SPENGEL.

IIO

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