US789378A - Apparatus for teaching telegraphy. - Google Patents

Description

o. 789.378. PATENTED MAY 9,1905.

H. G. PAGE. APPARATUS FOR TEACHING TELEGRAPHY.

APPLICATION FILED SEPT. 26, 1904.

ew'wmm p 95 Momma, (5% whom Patented May 9, 1905.

HOWARD G. PAGE, OF FITCHBURG, MASSACHUSETTS.

APPARATUS FOR TEACHING TELEGFtAPl-lYn SPECIFICATION forming part of Letters Patent No. 789,378, dated May 9, 1905. Application filed September 26,1904. Serial No. 226,063.

To all whom it 771/011,! concern.-

Be it known that I, HOWARD G. PAGE, a citizen of theUnited States, residing at Fitchburg, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Apparatus for Teaching Telegraphy by Mail; and I do 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, reference being had to the accompanying drawings,

and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to certain new and useful improvements in apparatus for use in teaching practical telegraphy by mail; and it has for its object the provision of an apparatus designed to record telegraphic transmission upon a paper ribbon similar to that employedin connection with the old register telegraph system, the device being adapted to reproduce the same at any future time upon a regular telegraph-sounder of the type and similar in. construction to that in which it was originally recorded, without the necessity of in any way altering the construction or mechanical adjustment of the machine.

An essential feature of the invention resides in the provision of an apparatus of this character by the use of which telegraph. messages may be recorded upon a continuous paper ribbon, which maybe transmitted through the mails and afterward reproduced, thus affording a convenient means whereby practical telegraphy may be taught by mail, and the invention is especially designed for such use in correspondence schools. The student, being furnished with records, will reproduce the same, thereby learning to receive messages by sound, and in. turn will be required to make records of his own transmitting, which he will return by mail to the school to be corrected. It is well known that in telegraphy each operator has a style of hand peculiarly his own in transmitting messages, and it is essential that the student should be able to receive with e ual facility all styles of transmitting, and as t 1e reproduction of messages transmitted by my apparatus is an exact reproduction of the transmitting the advantages derived from the use of my device for the purpose for which it is intended. will be at once evident.

To these ends and. to such others as the invention may pertain the same consists in the novel construction and in the peculiar combination, arrangement, and adaptation of parts, all as will be hereinafter fully described, shown in the accompanying drawings, and then specifically defined in the appended claims.

The invention is clearly shown in the accompanying drawings, which, with the letters of reference marked thereon, form a part of this specification, and in which drawings Figure 1 is a top plan view of an apparatus constructed in accordance with my invention. Fig. 2 is a side view looking in the direction of the arrow, and Fig. 3 is an end view of the apparatus with the telegraph-sounder and battery connections shown.

Reference now being had to the details of the drawings by letter, A is a roller, which at its ends is provided with concaved seats a to receive the conical ends a of the screwthreaded stub-shafts B, which shafts are passed. through openings provided in the side plates 0, rising from and secured to the baseplate I). Said stub-shafts B being screwthreaded aflord a convenient method of adjusting the bearings of the cylinder, as will be readily understood. Said roller A is provided with a series of peripheral grooves 1), arranged at uniform distances apart, as shown.

E is a stylus carried upon a shaft extending through a slot E in the upright portion E rising from the base portion of the frame, said slot being of a length corresponding with the length of the roller, and the position of the stylus-point with reference to the roller being adjustable in the direction. of the length of the roller and being held in its adjusted position by a locking nut or head E", as shown.

F is a paper ribbon or tape which is passed under a roller], around the roller A, and over the roller f said rollers and f being provided with suitable bearings at one side of the roller A, as shown. The continuous ribbon F is fed to the roller A from any suitable source of supply, and its rate of movement is regulated. by any suitable clockwork or weight mechanism, such as is commonly employed and which it is not deemed necessary to illustrate, as the same forms no part of the present invention.

G is a lever pivotally connected at one of its ends at the side of the frame carrying the stylus, and at its free end said lever is provided with a contact-point 9 directly above a like contact-point g, which latter point is vertically adjustable by means of a screw 9 upon the end of which it is carried.

H H are electromagnets, and H and H are the armatures and pole-pieces of said magnets, the armature H being carried upon the armature-lever G. The magnets H are in circuit with a battery J through the wires I and K, and an ordinary telegraph-key L is included in said circuit, as shown.

The roller A is provided at its end with suitable flanges M to hold the paper against lateral displacement, and each of the guiderollers is provided with a series of peripheral grooves corresponding with the grooves upon the roller A.

From the foregoing description of construction the operation of the device will be readily understood. The paper ribbon F is drawn from a blank roll under the guideroller j, around the roller A, and over the lower guide-rollerf to the reeling device located in the direction shown by arrow in Fig. 3. The stylus-point may be adjusted horizontally along the slots E and is secured by the set-screw E in such a position as to cause it to register opposite the first slot Z) upon the roller. The electromagnets H when the circuit is closed serve to draw the armatures H upon the armature-lever G downward, forcing the stylus-point into the groove opposite which it is located, and as the paper ribbon covers the face of the roller the stylus-point serves to emboss a groove in the paper (which paper is moving around the roller at a uniform speed) as long as the circuit is closed. lVhen the circuit is opened, the magnets are released and the consistency of the paper will force the point of the stylus out of engagement therewith, this being rendered possible by reason of the proper adj ustment and balancing of the lever.

The stylus-point embosses dots and dashes in the paper ribbon, which dots and dashes correspond to the movements of the key L. hen the full length of the ribbon has thus been passed over the roller A, it is then reeled back into its first position and. started over again, the stylus in the meantime having been moved along the groove E and the stylus-point set and secured opposite the next succeeding groove 5 in the series upon the roller, this course being repeated until a munber of lines corresponding to the number of grooves in the series upon the roller have been embossed. I have secured the best results from the use of ten of these peripheral grooves, although of course the number may be varied if desired. When the entire surface of the ribbon has been thus embossed, the roll is removed and another substituted for it. It will be noted that in making a record the movements of the armature-lever G are repeated upon a regular telegraphsounder through the contact-points g and g, which are included in a second circuit com prising sounder, battery, and contacts 9 and g. It will be seen that the student will be enabled to hear his own transmitting at the time of making a record, as though practicing in the ordinary way.

In order to reproduce a record, it is simply necessary that the ribbon upon which a record has been made should be run through the machine, disconnecting or leaving open the operating-key.

As an embossed groove of the paper passes before the stylus it will allow the point of the stylus to enter the groove and in so doing will lower the annunciator-lever G,

thus closing the sounder-circuit at the con- 7 tact points 9 and g. As the embossed groove passes by the point is thrown out and serves to break the contacts at g and g. The stylus-point moves in unison with the embossing in the paper and accordingly as the point is moved in making the record. In reproducing, however, the point does not enter the paper as deeply as in recording.

The contactpoint G is permitted to move vertically a very slight distance (less than one sixty-fourth of an inch) and is held down to the lower extent of its play by a small spring 7r. In reproducing, the slight movement of the stylus serves to bring the contacts together. In recording, the movement or play of the contact 9 allows a trifle more motion to the lever and point, thus serving to effect a deep embossing of the paper.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A device of the character described, comprising a frame, a grooved roller mounted in suitable bearings thereon, electromagnets, an interrupter in circuit therewith, a ribbon adapted to pass about said grooved roller, an adjustable stylus, a rock-shaft, an arm fixed thereto and carrying said stylus and a lever also fixed to said shaft, contact points, one carried by said lever, and the other mounted in said frame, and electrical connections, and an armature carried by said lever, as set forth.

2. A device of the character described, comprising a frame, a grooved roller mounted in suitable bearings thereon, electromagnets,

an interrupter in circuit therewith, a ribbon and the other mounted in said frame and elec- 10 adapted to pass about said grooved roller, a trloal conneotlons as set forth.

rook-shaft mounted in suitable bearings upon In testimony whereof I hereunto af'fix my the frame, an arm fixed to said shaft, an ad signature in presence of two witnesses. 5 justablestyluscarried bysaid ar1n,asetscrew HOYVARD G PAGE forholding said stylus in an adjusted position, a lever fixed to said rook-shaft at right angles Witnesses to said arm, an armature secured to said le- GEORGE WV. RICHARDSON, ver,oontaet-po1nts one secured to said lever, WALTER G. COREY.

Images