US130831A - Heney van hoevenbeegh - Google Patents

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H. VAN HOEVENBERGH.

Improvement in PrintingTelegraphs.. .No. 130, 31; Patented Aug. 27, 1872.

INVENTOR UNI ED STATES PATENT OFFICE.

HENRY VAN HO'EVENBERGH, OF BROOKLYN, NEW YORK.

[IMPROVEMENT IN, PRlNTlNG-TELEGRAPHS.

To all whom it may concern:

Be it known that I, HENRY VAN HOEVEN- BERGH, of Brooklyn, in the county of Kings and State of New York,have invented an Improvement in Printing-Telegraphs, of which the following is a description:

In this telegraph there is an armature-wheel havingarmatures and intermediate spaces, and serving as a motor and a holder or stop to the type-Wheel. The number of characters or spaces upon the type-wheel corresponds with the number produced by multiplying the number of armatures by the number of electromagnets. The electro-magnets are energized alternately or in succession, and the pulsations keep up a continued revolution of the typewheel; but when the current is not broken in one of the magnets the type-wheel is stopped thereby and held until the current is broken and the pulsation sent to the next electromagnet. A ratchet-wheel and pawl prevent the type-wheel being moved backward or in a wrong direction. The printing is effected by. sending through both helices of a magnet simultaneous pulsations; but said printing-magnet is not operative while the type-wheel is being turned, because the cores in the two helices are not magnetized at the same time, and the power hence is insufficient to move the armature. To bring all the type-wheels of the instruments on a circuit into unison a swinging bow is attracted by energizing both type-wheel magnets and then alternating the pulsations, the bow being held by first one magnet and then the other; and'this bow stops the further rotation of the type-wheel at the unison-point. The unison-bow is liberated by opening both circuits, which has also to be done after printing, to allow the parts to resume their normal position. The paper is held by a stationary clamp while the printing-lever is moved; hence the paper is drawn along by that act.

In the drawing, Figure 1 is a'plan of the instrument, and Fig. 2 is a side view of the same.

The printing-magnet is made of the coils or helices a b, with their cores, as usual. The armature 0 and lever d effect the printing. The type-wheel .e is upon the shaft f, which also, preferably, carries the armature-wheel h. The armature-wheel might be upon a separate shaft, geared to the type-wheel shaft. The

armature-wheel is made with the required number of armatures to form both a motor and a stop or holder to the type-wheel. I prefer to employ an armature-wheel made with radial armatures revolving between the poles of two electro-ma-gnets, as shown; but there might be more than two electrormagnets, and the armatures may be arranged cylindrically or conically and the electro-magnets be placed around the wheel. In either case the electromagnets act as motors and holders to the type-wheel without the intervention of lovers or escapements or pallets; and the number of spaces -or characters on the type-wheel is a multiple of the number of the armatures and electro-magnets. The pairs of helices 7c 70 and l l and their respective cores compose the typewheel magnets, and the helices 7c are in the same circuit as the helix a, and the helices l are in the same circuit as the helix 1), as seen in Fig. 1. The binding-screws 1 2 3 4 receive the respective wires, the screws 1 2 being for the line-wires connecting to the pulsator; and the screws 3 4 receiving the wires to the next instrument or to the earth-circuit. I have shown a circuit-changer composed of the toothed disks m n with the circuit-closer5 to the battery p. This circuit-changer is revolved by suitable means and sends a current from p alternately through 70 a and l b, actuating the armature-wheel and type-wheel with whatever rapidity of revolution is given to the disks m n,- and when thedisks are stopped the typewheel is held firmly by the magnet that is energized acting upon the wheel-armature that is contiguous thereto. The ratchet-wheel 22 and pawl 23 prevent the type-wheel revolving backward when started, and the parts are so positioned that the armature-wheel is stopped with the armature that is next to be attracted slightly nearer to its core soas to be operative in renewing the revolution. To eflect the printing it is only necessary to energize the other core, a or b, one helix and core being insuflicient to move the printing-lever. To effect this I employ a contact-spring, 1", key 10, and connections to the battery 11; so that on sending a current by closing the key 10 the printing will be effected. In this case care must be taken to make the connections, so that the polarity in the electro-magnets a b is the same. It will be evident that the circuit closed by the key, although going through the other magnet 70 or I, will not move the type-wheel, because the magnet at which the type-wheel was stopped exerts the superior force upon the armature that is contiguous thereto. Both circuit-s'are broken to relieve the printing-lever after ,the impression. The printing-lever d is provided with the impression-pad 16, and the paper is guided at 17 and passes nearly vcr- Upon the type-wheel shaft f is an arm, 26, and

a hinged bow, at, is provided with an arm, 24:, that ordinarily is kept from contact with the said arm 26 by a spring, 27 but when both magnets 70 l are energized the force is sufficient to draw down the bow a, one magnet alone beinginsufficient. In this condition the magnets l 70 are alternately energized to move the type-wheel around until arrested by the unisonarm 26 stopping against 24. Each one of said magnets retains the bow by its own magnetism until the next magnet is energized. It is desirable that the printing-magnet should not 'be energized when the bow is attracted by the magnets 70 Zwhen setting the instruments at unison. For this purpose a reverse current is sent through the key t, which is effective in attracting the bow a, but is neutral in operating the printing-lever.

I claim as my invention- 1. An armature-wheel revolved by electromagnets, and arrested by either of the electromagnets when its circuit is not broken, in combination with a type-wheel and printing mechanism, substantially as set forth.

2. An electro-motor composed of two electromagnets in separate circuits, in combination with a printing-magnet the helices of which are in the same circuits as the motor-magnets, substantially as specified.

3. The printing-lever and impression-pad, in combination with a holding-pawl, operated, substantially as set forth, for drawing the paper over the pad by the movement of the printing-lever.

4. The unison mechanism, first operated by the joint action of the two electro-magnets that revolve the type-wheel, and held in operation by either of the magnets as alternately energized, substantially as set forth.

5. An electro-magnet with the two helices or coils in separate electric circuits, which circuits are separately employed for different operations, but jointly to operate the said electromagnet, substantially as specified.

Signed by me this 18th day of July, A. D.

HENRY VAN HOEVENB ERGH.

WVitn esses:

GEO. T. PrNcKNEY, CHAS. H. SMITH.

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