US245732A - And john e - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.-

J. H. LONGSTREET & J. E. WRIGHT. PRINTING TELEGRAPH.

' No. 245,732. Patented Aug. 16,1881.

r as m on, D. c.

I 2 Sheets-Sheet 2. J. H. LONGSTREET 82; J. E. WRIGHT.

PRINTING TELEGRAPH.

No. 245,732. Patented. Aug. 16,1881.

(No Model.)

ATTEIET= UNITED STATES PATENT OFFICE.

J. HOLMES LONGSTREET, OF HOBOKEN, NEW JERSEY, AND JOHN E.

' WRIGHT, OF NEW YORK, N. Y.

PRINTING-TELEGRAPH.

SPECIFICATION formingpart of Letters Patent No. 245,732, dated August 16, 1881.

Application filed June 22, 1881.

To all whom "it may concern Be it known that we, J. HOLMES LONG- STREET, a citizen of the United States, residing at Hoboken, in the county of Hudson and State of New Jersey, and JOHN E. W'RIGHT, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Printing-Telegraphs, of which the-following is a specification.

The object of our invention is to increase the speed at which printing-telegraphs may be operated, and a further object is to improve the construction of the devices used in setting the type-wheel to unison.

Our invention consistsin a certain novel construction of the electromagnetic devices used in rotating or controlling the movements of the type-wheel, and in a novel unison mechanism, the peculiarities of which will be hereinafter described and claimed.

Figure 1 is a side elevation of a printingtelegraph machine of ordinary construction.

Fig. 2 is a top view thereof. Fig. 3 is a detail view of the unison mechanism, and Fig. 4 is a detail perspective view of the electromagnetic devices which serve to rotate or control the movement of the type-wheel.

Our invention, so far as the type-wheel devices are concerned, is intended for application to that class of printing-telegraphs in which the movements of the type-wheel are controlled by reversed currents, and in which the printing is effected by a prolonged current of either polarity.

A represents a type wheel upon a shaft geared to a driving-train of ordinary construction, and provided with an escapement-Wheel, the movementof which is controlled by an anchor-escapement vibrated by a polarized electro-magnet. The anchor-escapement is shown at 3 engaging with the escape-whee1 4.. It is attached to an extension, 5, from a rock-shaft, 6, which carries a hollow slotted vibrating core, a, of an electro-magnet, B.

Grepresents a permanent horseshoe-magnet secured to the side of the frame D. The upper ends of the magnet are bent over into a horizontal plane, as shown at E, and are provided with adjustable pole-extensions F, be-

(No model.)

tween which the upper end of the tubular slotted core a, vibrates when reversed currents pass through the helices of B. This construction is of extreme simplicity, and the devices are found to respond with certainty and force to reversed impulses of extreme rapidity, thus allowing ot' a material increase in the speed with which the type-wheel may be rotated.

G represents the printing electro-magnet, and c a tubular slotted core in one ot'its helices, which is mounted upon a rock-shaft, one end of which is seated in the bracketv h. The upper end of the core vibrates to and from the bar 1, extending horizontally from the core of the other helix of the magnet. The printingpad is carried by a lever, m, pivoted at H and provided with a horizontal transverse extension, k, to which is attached a vertical extension, n, the end of which enters the top of the tubular core 0. A set-screw, p, in the end of the core serves to adjust the amount of play of the part at within the core.

Attach ed to lever m is the arm M, which controls the unison devices and unlocks the unison stop from the train wherever the printingpad is operated. The unison device itself is shown in Fig. 3.

L is a ratchet-wheel attached to a slowlymoving shaft of the train which ixnpels thetype-wheel, and moving continuously in the direction indicated by the arrow. Fitted loosely to the same shaft is the locking-arm 1? of the unison stop mechanism, while B is an arm fixed to the type-wheel shaft, which engages with 1? when the latter is raised to the proper point.

Pivoted to the arm P is a gravity or spring pawl, S, which tends to constantly engage with the ratchet-wheel L, thus locking the arm P to the train and causing said arm to be lifted toward a point where it will lock the typewheel shaft. The pawl S is provided with a curvilinear extension, 1?, against which the arm M impinges whenever the printing-pad is operated, thus disengaging the pawl from the ratchet wheel L and allowing the arm 1 to drop back by the action of gravity or a spring to its starting-point. The curvilinear extension t at the same time rests upon and slides upon the arm M, and the pawl is thus prevented from re-en gaging with the ratchet before the arm P has completed its movement.

The operation of these devices will be readily understood. The motion of the wheel L is so small with relation to that of the type-wheel that two or more revolutions of the latter are required before the arm P is raised sufliciently to engage with R. In the normal operation of the machine the printing-pad is operated and the pawl disengaged before the arm P engages with B. When it is desired to set the typewheel to the unison-point it is made to revolve continuously without operating the printingpad until the wheels of all the instruments upon the line are locked at the unison-point. The pawl S is then unlocked from the ratchetwheel by the action of the printing-lever, thus allowing the arm P to drop back into normal position, unlocking the type-wheel. The typewheels at all stations then start from the unison-point.

What we claim as our invention is-- 1. The combination, with the escapement mechanism of a printing-telegraph, of a rockshaft carrying the escapement devices, a tubular slotted vibrating core mounted upon said rock-shaft, a stationary helix, and a permanent magnet Whose poles embrace the vibrating end of the tubular core, substantially as described.

2. The combination, substantially as described, ot' the permanent magnet O, the ends E ot which are bent at right angles, the hollow slotted core a, rock-shaft, stationary coil B, and the escapement devices of a printing-telegraph.

3. A unison-sto p device consisting of a locking-arm for the type-wheel mounted loosely upon a shaft of the driving-train, a toothed wheel keyed to said shaft, devices adapted to positively lock the arm to the toothed wheel, so that it may be propelled positively toward a point where it will stop the movement of the type-wheel shaft, and disconnecting mechanism operated by the printing devices, substantially as described, whereby the arm may be unlocked from the wheel and allowed to drop back to a starting-point by the action of gravity or a spring.

4. The combination, with the revolving typewheel and projecting arm revolving therewith, ot the locking-arm P, pawl S, curvilinear extension t, disengagingarm m, connected to the printing devices, and ratchet-wheel L, the latter arranged to propel the arm against the ac-' tion of gravity or a spring toward a point where it will lock the type-wheel from rotation, substantially as described.

J. HOLMES LONGSTREET. JOHN E. WRIGHT. Witnesses:

J. LEDYARD HODGE, ALBERT GLEASON.

Images