US431784A - Printing-telegraph - Google Patents

Description

'(No Model.)

. G. B. SCOTT.

' PRINTING TELEGRAPH;

'No. 431,784. Patented July 8, 1890.

Ground INVENTOR:

WITNESSES:

ATTORNEYS.

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GEORGE B. SCOTT, OF LAKEWOOD, NEW JERSEY.

PRINTING-TELEGRAPH.

SPECIFICATION forming part of Letters Patent No. 431,784, dated'J'uly 8, 1890.

Application filed May 18, 1889. Serial No- 3l11 (N0 11101161,)

To all whom it may concern:

Be it known that I, GEORGE E. SCOTT, of

Lakewood, in the county of Ocean and State of New Jersey, have invented a new and Improved Printing-Telegraph, of which the following is a specification, reference being had to the annexed drawings, forming a part thereof, in which---- Figure 1 is a perspective view of the working parts of my improved printing-telegraph, the frame having been omitted to more clearly show the working parts; and Fig. 2 is a side elevation of a modified form of the type-wheel, actuating mechanism.

Similar letters of reference indicate corresponding parts in both views.-

The object of my invention is to construct a printing-telegraph in which the type-wheel shaft will be propelled by power derived from the impulses sent over the line in the ordinary working of the instrument.

My invention consists in a printing-telegraph provided with a ratchet-wheel and pawl arranged to be actuated by a magnet placed in the main circuit or one of the magnets commonly used in printing-telegraphs, the said ratchet-wheel being connected through the medium of a spring with the type-wheel shaft, all as hereinafter more fully described.

The type-wheel shaft A is provided at one end with the type-wheel B and at the opposite end with the scape-wheel O, in the usual way. The scape-wheel O is engaged by pallets a a, carried by the oscillating armature D, which is supported by the shaft a. The armature D is encircled by a helix E, outside of which is arranged a permanent magnet F, with inwardly-turned polar extremities,which attract the armature D. The printing-lever G, which presses the paper against the type-wheel B, is

secured to a rock-shaft H, journaled in the frame of the machine and carrying the armature I. Below the said armature I is arranged the printing-magnet J, which is made to act upon the armature Iin the manner presently to be described.

The type-wheel shaft A is provided with a pinion K, which is engaged by a spur-wheel K, carried by the sleeve I), mounted loosely on the shaft 0 near one end thereof. To the opposite end of the shaft 0 is attached the boss d of the ratchet-wheel L. wheel is secured one end of a spiral spring M, the opposite end of which is attached to the spur-wheel K.

' In the frame of the machine (not shown) is journaled a rock-shaft N, which carries an arm 0, to the free end of which is pivoted a pawl e, which is adapted to engage the ratchetwheel L, the pawl being forced into engagement with the ratchet-wheel by a light spiral spring f, connected with the pawl and with the arm 0. The rock-shaft N carries an ar- -mature P, which is within the field of a mag- .said spring brings the pawl 6 into engagement with the ratchet-wheel L, thus causing the ratchet-wheel to turn, thereby winding the spring M with sufficient tension and frequency to impart to the wheel K all the power required to operate the type-wheel shaft A, thus avoiding the necessity of winding the propelling mechanism of the printer at stated intervals. 7

I dispense with a retaining-pawl in connection with the ratchet-wheel L, as I have found by experiment that the inertia of the wheel prevents any retrograde movement in the intervals between the engagements of the pawl 6 with the ratchet-wheel.

Whenever the rapid alternations of the current cease and the current is allowed to flow continuously in one direction for an appreciable length of time, the printing-magnet J becomes energized and the printing takes place in the usual manner while the typewheel is at rest.

In the modification shown in Fig. 2 an arm 0 is connected with the printing-lever G, forming a prolongation thereof, and carries at its free extremity a spring-actuated pawl Tothe ratchete, which engages a ratchet-wheel L on the shaft 0. The arm 0' is drawn down by the retractile spring R, thus operating the shaft 0' through the medium of the pawl e and ratchet-wheel L. The impulses which accomplish the printingbeing less frequent than those which actuate the escapement, the gearing for operating the type-wheel shaft will have to be modified so as to multiply the revolutions of the shaft 0 sufficiently to cause the scape-Wheel upon the shaft A to keep up with the escapement.

In connection with my devices I use an alternating current generated by a battery and alternated or reversed bya pole-chan ger of any ordinary well-known construction, or I generate alternating currents by means of a magneto-electric machine known as the Siemens H -armature machine. I have shown this form of alternating-current generator in my drawings; but I do not confine myself to this machine, as I may employ any known means of producing alternating currents.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In a printing-telegraph receiver, the combination, with the type-wheel shaft, of springaetuating mechanism for driving the typea retractile spring connected with the pawl.

and constructed and arranged in conjunction with the pawl to move the ratchet-wheel and wind the propelling-spring, a winding electromagnet placed in'the line-circuit, an armature held within the field of the electro-magnet and connected with the pawl-carrying arm, and an alternatin -current generator connected with the line, substantially as described.

GEO. B. SCOTT.

Witnesses:

C. O. HOLSKE, G. SEDGWICK.

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