US395614A - dewey - Google Patents

Description

(No Model.)

M. W. DEWEY.

PRINTING TELEGRAPH. I No. 395,614. Patented Jan. 1, 1889..

WITNESSES:

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liNiTEn STATES PATENT tries,

MARK XV. DEXVEY, OF SYRACUSE, EVV YORK, ASSIGNOR OF TVO-THIRDS TO EMIL LAASS AND CHARLES H. DUELL, OF SAME PLACE.

PRINTING=TELEGRAPH.

SPECIFICATION forming part of Letters Patent No. 395,614, dated January 1, 1889.

Application fi January 30, 1888. Serial No. 262,367. (No model.)

To all whom it may concern: plane therewith. These colid'ucting-plates are Be it known that I, MARK XV. DEWEY, of all connected to one and the same metallic Syracuse, in the county of Onondaga, in the strip, b, which is connected with the battery State of New York, have invented new and A and ground. A metallic key, C, which also useful. Improvements in Printing-Telegraphs, serves as an indicator, is pivoted in the cenof which the following, taken in connection ter of the aforesaid annulus of plates A B O, with the accompanying drawings, is a full, &c., and is provided with a suitable insulated clear, and exact description. handle, 0, by which to rotate it on its axis. The object of this invention is to provide The free end of said key carries a suitable IO a printing-telegraph apparatus which shall be electrode, C, which is in the path of the aforesimple and comparatively inexpensive in consaid plates A B C, &c., and bears on said path, struction and capable of being operated we said electrode being preferably of the form of peditiously and without requiring long practhe metallic spring, as shown in Fig. 3 of the tice to enable a person to transmit messages drawings. The axis of this combined key and 15 quickly and intelligently on one line-wire. indicator is connected with the line-wire e,

The invention is fully illustrated in the anand by revolving the key C on its axis the neXed drawings, in which electrode 0' is drawn successively across the Figure 1 is a diagram view of two connectplates A B O, &c., and intervening insulating ing-stations, each having my improved appa material, and thereby a corresponding num- 20 ratus, consisting of a transmitter, a receiver ber of impulses are sent over the line to the or printer, call-bell, and batteries and connecreceiving-station, where they pass through the tions. The call-bell and transmitting-instruarmature F, which turns the type-wheels with ment, which are fully illustrated at the staa step-by-step movement, aided by the spring tion designated by the letter X, are only inf on the opposite side of the lever.

25 dicated at the station designated by the let- 'When the key C of the transmitter is roter Y, and thereceiving-instrument or printer, tated the distance from one contact-plate to which is fully shown at the latter station, is the next, the circuit is broken intermediately only indicated at the station X, but the conby the intervening insulating material, and nections are alike at both stations. This is the breaking of the circuit causes the arma- 30 done to simplify the drawings and to avoid ture to reoede from the magnet F, and thus confusion, as it will be readily understood that causes the lever I to turn the type-wheels onethe apparatuses at the two stations are alike, half of the distance from tooth to tooth; and so that messages may be sent in opposite diwhen the armature is again attracted by the rections. Fig. 2 is a transverse section on magnet the ratchet-wheel is again turned to 5 line m on, Fig. 1. Fig. 3 is also a vertical transcomplete its movement from tooth to tooth, verse section of the same, showing more clearly and as the type-wheels turn synchronously the electrode connected to the combined key with the ratchet-wheel, and the number of and indicator. The viewof the receiver shown characters and spaces on the type-wheel corin Fig. 1 is taken from the rear thereof to betrespond to the number of teeth on the ratchet- 40 ter illustrate the mechanism. Fig. 4 is a top wheel, the type wheels are moved the distance plan view of the printing-lever and its appurteof two adjacent letters or characters, and nances; and Fig. 5 is an edge view of the typewith a complete revolution of the transmitwheels, showing the mechanism for shifting ting-key the type-wheels make a complete the same. revolution. By making the plates A B O,

45 The transmitter is composed of the follow- &c., to correspond to the characters on the 5 ing parts, viz: a series of conducting-plates, type-wheels, the key 0, pointing to said mark- AB C,(he,arranged,preferably,equidistantly ings, serves as an indicator for guiding the apart, in the form of an annulus, and preferoperator in operating the key. ably countersunk in the bed D, of non-con- L designates the printing-lever, which is 50 ducting material, so as to form one uniform pivoted intermediate its length, and carries 10o the platen N on one end and has fixed to the opposite end the armature g of the magnet II. Both magnets F and II are in the single main line.

The peculiar feature of my invention, so far as it relates to the receiver, consists in the fact that both the type-wheel magnet F and printing-magnet II are energized by'currents of the same polarity sent through one linewire, the armature of the former responding to the intermittent current and the armature of the latter respondin only to currents of greater strength. The intermittent current which energizes the type-wheel magnet I? flows through the printing-magnet ll,'but is not of sufficient strength to overcome the resistance of the spring f and attract the armature. The means by which this increase of strength for operating the armature of the printing-magnet is sent to line is as follows:

Concentric with the annulus of plates A B C, &c., and insulated therefrom, is a metallic ring, "L, connected with a battery, A, and ground, and to the keyC is attached the contact-point Z, which is in the path of the ring '2', and normally out of contact therewith. \Vhen the key 0 of the transmitter is retated so that the electrode 0 bears on the plate marked corresponding to the letter or character to be printed, the type-wheels are also in requisite position over the platen to print the corresponding letter or character. \Vhen the key 0 is in the position aforesaid, the depression of said key by the operator brings the point I in contact with the ring 1', and thereby allows the current of the battery A to pass through the ring 2', thence through the key (J, and thence to line.

The strength of the two batteries A and A causes the printing-magnet ll to overcome the resistance of the spring f and attract the armature g, attached. to the printing-lever. By the movement of said prin ti ng-lever the platen, over which runs the paper ribbon from a continuous roll, is broughtinto contact with the character to be printed, and when the key 0 of the transmitter is released the pointl automatically draws out of contact with. the ring '1', and thus deprives the line of the strength of the battery A and causes the printing-lever L to carry theplaten away from the type-wheels, and in this movement of the lever the small ratchet-wheel n on the end of platen is turned for another character by means of the sprin g-pawl n, as shown :in liig. l.

The movements of the lovers I and L are limited by means of stops in the usual manner. I prefer to employ two type-wheels arranged side by side and movable laterally on their shaft 9, as hereinbefore described, one of said wheels having letters and the other figures. The shifting of the type-wheels is effected by the following mechanism: To an arm, m, rigidly attached to the shaft g, is pivoted a lever, 0, one end of which is connected with the sleeve 9. To the printing-lever L are attached two upward-projecting cams, 1.)

and. p, as shown in Figs. 4 and 5 of the drawings. Said cams stand in such relative positions that the pressure of one cam on the free end of the lever 0 shifts the type-wheels E E in one direction, and the pressure of the other cam on the lever o, as aforesaid, shifts the type-wheels in the opposite direction. By turning the type-wheels E E so to bring the free end of the lever 0 directly over one of the cams, and then moving the printinglever L toward the type-wheels, the said cam crowds the lever 0 to one side, and thus shifts the type-wl'leels laterally on their shaft. In order to enable the transmitter to control the aforesaid movement, I place the two cams p 1) one back of the other in the direction of the length of the printing-lever, so that one cam can engage the lever sooner than the other cam during the rotation of the typewheels, and the annulus b of the transmitter T, I mark at proper points, as shown at t and 2", at which to depress the key C, so as to cause the printing-lever to be actuated by the re-enforced current over the line, as hereinbefore described.

0 designates the inking-roller, which may be composed of disks of felt or other suitable and well-known. material.

The mode of operation. is as follows: The apparatuses at both stations standing at zero, the lines connected with ground at said stations through the call-bell branch, the sendlug-operator breaks the ground-connectioi1 and connects with the transmitter T by means of a switch, a, and thereby also causes a current to flow to line, operating call-bell at the receiving-station. As the movement of this switch cuts out the bell. of the transmittingstation, the operatm: may move back said switchforan answcr,-ilf he desires. This may not be really necessary, as a message may be received. in the absence of the receiving-operator if the 'rcceiving-instrument is properly in circuit, and he may immediately proceed to transmit the message by turninthe key C to the right, or in the direction of the hands of aelock, and depressing for amoment when the key is opposite the desired letter, then turning, as before, to the next, and so on.

As will be noticed, it is not necessary to make a complete revolution for each letter in a word, for in. many words the letters follow each other in such a manner that several letters may be printed consemitively during a single revolution of the key. For in stance, the word hotel would require two revolutions in. the first H O T and in the secondE L. It the key is accidentally turned past the letter to be printed, the key must make an entire revolution and be brought to the proper position over the letter to be printed, as the key should not be turned backward.

\Vhat I claim. is-

In a printirig-telegraph, the combination, with the recording or receiving instrument, of the transmitting-instrument, consisting of two concentric insulated annuli, one having a series of equidistant contact-points and the other being continuous, and a rotating key having contact-points adapted to be brought into contact with the respective annuli to transmit (jllllfGlll'S of different strength to the type-Whecloperating mechanism and the printing-lever, respectively, through suitable electrical connections and batteries, substantially as specified.

2. The transinittiug-instruinent consisting of two concentric insulated annuli, one having a series of interrupted contact-points and the other being continuous, in. con'ihiuatioi'i with a rotating and vibrating lever and proper electrical connections, whereby intermittent pulsations of dififereut strength may be sent to the receiviug-instrinnent when the transmitting and receiving instrument are electrically couum-ted, substantially as specitied.

The comhination,\vith the n-inting-lever L and pivoted shaft g, of the laterally-movable type-wheels E E, connected to the said shaft by groove and feather, the arm m, projecting from said shaft, the lever 0, pivoted to said arm and connected at one end with the type-Wheels, and the canispp, )roj ecting froni the printing-lever, one back of the other in the direction of the length of said lever and adapted to engage the free end of the lever 0 at opposite sides thereof, substantially as described and shown.

In testimony whereof I have hereunto signed my name, in the presence of two witnesses, at Syracuse, in the county of Onondaga, in the St te of New York, this 28th day of January, 1

ARK \V. 'DEWEY.

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