US511234A - cornand - Google Patents

Description

(No Model.) 2 SheetsSheet 1.

A. P. M. GORNAND.

MORSE TRANSMITTER.

No. 511,234. Patented Dec. 19, 1893.

V will"! 2 Sheets-Sheet 2,

FL MN A. P. M. CORNAND.

MORSE TRANSMITTER Patented Dec. 19, 1893.

m f -H Glam/W (NO Model.)

UNITED STATES PA ENT OFFICE.

ALBERT FRANCQISllIARIE CORNAND, OF BRUSSELS, BELGIUM, ASSIGNOR OF ONE-HALF TO Vt. T. BARNARD, OF NEW YORK, N. Y.

MORSE T RANSMlTTER.

SPECIFICATION forming part of Letters Patent No. 511,234, dated December 19, 1893.

Application filed May 29, 1889. Serial No. 312,574. (No model-l .770 aZZ whom it may concern:

Be it known that I, ALBERT FRANCOIS MARIE CORNAND, a subject of the King of Belgium, residing at Brussels, Belgium, have inven ted certain new and useful Improvements in Morse Transmitters, of which the following is a specification. My invention relates to automatic telegrapl transmitters of that general class in which a simple depression of a key or lever causes the proper number of dots, dashes and spaces, or other elements of a code, to make any particular letter, character or signal to loo-automatically transmitted without further action on the partof the operator.

The object of my invention is to produce a simple and effective means which shall be cheap in construction and at the same time capable of operating efiectively and rapidly, and Ihave shown it as applied to aset of key levers arranged substantially like the similar levers in the ordinary typewriter in general use, although, of course, it may be applied to other forms and constructions without departing from the principles of my invention. In this way not only is a skilled operator onabled to transmit signals rapidly, but an unskilled operator can send signals that can be understood, and the whole operation can be carried through with less fatigue and exertion than in the ordinary transmission with the Morse key.

To these ends my invention consists in a construction and arrangement of parts substantially as pointed out hereinafter.

- designating marks corresponding with-the signals to be sent, preferably both in the usual form or character, and in the corresponding code signal. The rear portion of each of these levers terminates in a projection 0 haying the general outline of an arc, and 1n the are are formed spaces of varying lengths and arrangements corresponding to the code signals. As shown in Fig". :3, the levers B are made of conducting material and the code signals are formed by merely cutting out portions of the arc shaped projection corresponding to the signal to be sent. It is evident, however, that insulating material may be inserted into the projection C, so that its outer surface will be flush with the same, as shown at 0 and these insulated portions will correspond with the characters or signals to besent, or will be so arranged as to leave the exposed portions of the metal to so correspond, depending upon whether the apparatus is used on aclosed or open circuit.

Mounted in a standard Dsecured to the base A isa swinging frame E carrying a brush or metal sheet E on its lower end,and so arranged that when the frame is rocked the brush will swing over the projection G of the levers B. This brushis preferably separated from its holder by some insulating material G, as rubher or t-helike, and the brush may be connected to one portion of the line circuit, as indicated by L. Means may be provided for normally holding the brush in its forward position, as bya spring H and adjusting screw I. Also mounted in standards, as J, is a bar K, carrying a lever M, one portion of which extends rearward and is connected to a bell crank lever or projection N on the frame E, and the other portion of which extends forward and is provided with a rod 0 adjustably connected to the bar P.' This bar P extends beneath all the levers B, and if desired a second bar Q may be arranged above the levers and secured to the rod 0. Each key lever is preferably provided with a spring R, located underneath its forward end near its press button, and these springs are con nected to form one terminal of the circuit of the battery X.

Such being the general construction and arrangement of the parts, the operation may be described as follows: \Vhen any particular key is depressed its corresponding key lever is vibrated upon its axis, causing the are shaped projection G to be raised, as indicated in Fig. 2, above the level of the other key levers, and this same movement of the lever depresses the bar P, and with it the rod 0, causing the lever M to he vibrated, and this, by means of the connection shown,

IOC

moves the brush Fever the face of the are shaped projection, causing the circuit to open and close in accordance with the insulated or cut away portions in the arc of this particular lever, and thus producing a regular telegraphic signal made up of the vnecessary dots, dashes, spaces or other characters to produce the desired effect on the receiving instrument. As soon as the lever is released the retracting spring causes the brush to assume its normal position, and this action may be aided by the bar Q arranged above the levers, if desired. It will thus be seen that electric contact'between the brush and the are shaped projection will only take place during, or immediately after, the depression of the key, and that there is no danger of mutilating thesignal by contact in the backward movement of the brush.

vIn order to prevent an accidental signal or impulse being sent, it, per chance, the brush should strike the rear end of the lever after having made its sweep across the insulated portions, I cover or protect the'rear end of the levers B with insulating material S; or the same purpose may be accomplished by applying insulating material 3 to the front portion of the brush, so :that electriccontact will only be obtained in its rearward sweep across the projection.

In the diagram Fig. 3, I have illustrated an arrangementof my device in circuit, and have indicated a modification, in which the apparatus can be used on the ordinary closed circuit. In this construction-the brush F is provided witha spring f-extending upward and normally resting in contact with an adjusting screw 6 the insulated connection between the-brush and holder E in this case being flexible. so that the brush comes in contact'with the are shaped projection, the brush is tilted sufficiently to break the contact between the springf and the screw 6, thus producing the signal on the receiving instrument U, the,

circuit (being closedthrough the otherbrushes and holders, as indicated. When the apparatus is used in an open circuit this additional spring and contact are not necessary.

In Fig. 4 I have indicated an equivalent construction of the are shaped portion of the lovers especially adapted for use on long lines or where great speed is desired. The spaces vin the projections O are filled with blocks 0 of metal or other'conducting material each block being insulated from the le ver and all are electrically connected to one pole of the battery X used for sending the true signals the other being connected to the levers as before. In this way when the'brush sweeps over the are a reversal of the current will take place after each signal is sent to line and when the lever is at rest no current will -be sent.

If it is desired to have a constant current When the key lever is raised or a closed circuit the 'fOllll .shown in Fig. 5 may be used with advantage. In this the brush f is used in connection with an additional contact point g,whioh is insulated from its carrier and connected to one side-orpole of the battery X the other pole being connected to the pin e. It will be seen that the spring f makes contact with one or the other of the pins eor 9 according as the brush bears upon the are or not and the signals are sent and the current reversed each time while the circuit is practically closed.

It will thus be seen that I produce an exceedingly simple apparatus, which can be operated bythose unskilled in the art of telegraphy, and messages can be transmitted rapidly and accurately with the expenditure of verylittle force.

What I claim is 1. In a telegraph transmitter, the combination with a series of key levers, each key being provided with a projection having insulated portions on its face, of a brush arranged toswing back and forth over the projections, electrical connections between the levers and brush and mechanical connections between the brush and the levers, whereby the brush is operated :by anyone of the levers, substantially as described.

2. In a telegraph transmitter, the combination with a seriesof key levers, each having are shaped projections at one end provided with insulated portions, of a pivotedbrushar- I ranged to vibrate above the are shaped projections, a lever connected with said brush and connections between the lever andeach of the key levers, whereby thebrush may be vibrated on the depression of anyone of the key levers,-substantially .as described.

3. The combination with a series of key levers connectedsto one terminal of the circuit,and-each having a projection provided with insulated spaces, a pivoted frame, a metallic brush carried by the frame, flexible insulating material between the brush and frame, and a spring connected to the brush and normally making contact withthe frame, substantially as described.

4. The combination with a series of key levers connected-to one terminal of a circuit, and each-provided with a projection having insulated spaces, of a vibrating frame, a metallic brush connected therewith, a lever connected to the frame, a bar extendingbelow the key levers andconnected to said'lever, and a retracting spring, substantially as described.

In testimony whereof I have signed my name tothisspecification in the presence of two subscribing witnesses.

JOHN R. GEARY, EUGENE GRAY.

Images