US1418657A - Motor mechanism for operating telautographs - Google Patents

Description

$.KUCHARSKIL MO TOR MECHANISM FOR OPERATING TELAUTOGRAPHS.

APPLICATION FILED OCT. h I9I9.

PatentdJune 6,1922.v

INVENTDR a? ATTEI F\I\] 9/ tries,

STANTSLAUS KUCI'IARSKI, 0F GHARLOTTENBURG, NEAR BERLIN, GERMANY ASSIGNOR T0 RICHARD A.'HA1\TSEMANN, OF BERLIN, GERMANY.

MOTOR MECHANISM FOR OPERATING TELAUTOGRAIHS,

Specification of Letters Patent. Patgnted June 6, 1922 Application filed. October 1, 1919. Serial No. 327,830.

To all whom it may concern:

Be it known that I, SrANIsLAUs 1UGHAR- SKI, a citizen of Germany, residing at and whose post-oflice address is Charlottenburg, near Berlin, Dernburgstrasse 45, Germany, have invented certain new and useful Improvements in Motor Mechanism for Operating Telautographs (for which I have filed an application in Germany, Sept. 19, 1918) and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in Grays telautographic instruments in which the movements of the pencil or stylus in the sending instrument are transmitted to the receiving instrument with the aid of electric current impulses which, by means of suitable electromagnets, impart corresponding step-by-step movements to the pencil in the receiving instrument. This is accomplished with the aid of an escapement wheel to which a tendency to rotate is permanently imparted lby a constant source of power, this wheel being alternately released and stopped by pallets controlled by the stepping electromagnet.

A known arrangement consists in the power that turns the escapement wheel, when released by the pallets, being stored up in a spring which continually tends to urge on the wheel like the main spring of a clock. In this known arrangement the said permanent power moves and accelerates, not only the escapement wheel at the moment it is released, but also all the parts connected to it such as the transmission wheels, escapement wheel shaft, and the writing mechanism of the receiving instrument which is driven by this shaft. In cases where the currentimpulses are received in very rapid succession the said arrangement does not enable the parts to be accelerated as rapidly as desired, so that the e capement wheel of the receiver does not always keep pace with the current impulses with. the required accuracy.

The object of the present invention. is to provide an arrangement by which the es capement in the receiver can easily and accurately keep pace with the series of impulses even if they are sent at a-very rapid rate. This is accomplished by coupling the escapement wheel to its shaft by springs that are kept tensioned by the permanently active driving power, and operation of which Flg. 2 a cross section on the line A-B of Fig. 1 viewed from the right.

The escapement wheel 6 is loosely mounted on the shaft a,between two discs 01, d which serve to guide the escapement wheel and which are surrounded by springs c, 0 The one end of each spring 0, c is fixed to its hub cl, 03 whilst the other end is attached to pins in the escapement wheel. These pins project into notches e in the discs 01, (Z (Fig. 2). The escapement wheel is controlled in the ordinary manner by a pallet 7 which is oscillated by an electromagnet 7b, and 1f necessary with the aid of a spring. The controlling movements of the shaft a are transferred in a known manner by a toothed wheel 9 to the rod 71 that controls the writing mechanism of the receiver. The shaft a is also under the influence of a power which is permanently exerted in the case illustrated by a spring enclosed in a box 7:: through intermediate gear Z.

The device operates in the following manner:

Suppose that the driving power tends to turn the shaft a and the discs (Z, d fixed on the shaft, as shewn in Fig. 2, in a counter clockwise direction. This rotary mo tion can only continue until the sides of the notches c of the discs 0?, (Z strike against the pins by which the springs c, c are attached to the escapement wheel. In this manner the springs o, c are tensioned. If the pallet f is now moved by a current impulse so as to release the escapement wheel, the springs c, c immediately urge the escapement wheel one step forward, whereupon the shaft a with discs d, al is rotated by the permanent driving power until the sides of the notches e strike afresh against the'pins to which the springs c, c are attached, the pins thus limiting the movement of the shaft. The springs c, 0 will then be tensioned again. At the same time the is such that they turn the escapement wheel escapeinent wheel will again be detained by the pallet f. It is thus seen that at each current impulse only the eseapement wheel itself is moved at first, this wheel being in no wise'encumbered by any other parts. The other parts are thus given time to move at a speed corresponding to their own inertia. The small differences of time between the movements of the escapeinent wheel and those of the rod controlling the writing inechanisnrhave no deleterious effect on the writing in the receiver because these differences are balanced in a few fractions ofa second. The springs or the means of attaching them are made to act as stops in order to prevent the escapement wheel from lagging too far behind or movingtoo far ahead of the shaft. i

I claim:

1. In a telautograph of the Gray type, a shaft, a source of power permanently tending to turnfsaid shaft, anescapement wheel loosely mounted on the shaft, a spring coupling the. escapement wheel to the shaft,

a pallet detaining the escapenient wheel 1 .so as to enable the said source of power. to

tension the said spring, and an electromagnet for movingthe saidpallet and releasing the escapement wheel.

2. In a telautograph of the Gray type, a shaft, a source of power permanently tending to turn the said shaft, an escapement wheel loosely mounted on the shaft, a coupling spring attached at one end to the esescapement wheel and at the other end to the shaft, a pallet detaining the escapement wheel so as to enable the said source of power to tension the said spring, the said coupling spring being adapted to operate also as a sto p-1nen1ber forliniiting the rotary movement of the escapement wheel relative to the shaft, and an electromagnet for moving the said pallet and releasing the escapernent wheel.

In testimony whereof I affix my signature, in presence of two witnesses.

STANISLAUS KUCHARSKI. Witnesses PAUL MAsooW, PAUL GALDA.

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