US118122A - Improvement in printing-telegraph instruments - Google Patents

Description

-fl @z% I ROBERT H. GALLAHER.

Improved Printing Telegraph Instrument. I I No. H8,I22V Patented August'l5, 1871.

Patented Au ROBERTH; GA'LL Improved Printing Telegrar T Instrument.

UNITED A STATE ROBERT H. GALLAHER, OF NE YORK, N. Y., ASSIGNOR TO GALLAI-IER GOLD AND STOCK TELEGRAPH COMPANY, OF SAME PLACE.

IMPROVEMENT IN PRINTING-TELEGRAPH INSTRUMENTS.

Specification forming part of Letters Patent No. 118,122, dated August 15, 1871.

To all whom it may concern:

Be it known that I, ROBERT H. GALLAHER, of New York, in the county and State of New York, have invented an Improved Automatic Printing-Telegraph Instrument and Relay; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying d awing making part of this specification Figure 1 being a side view of a printingtelegraph instrument constructed with my improve ments Fig. 2, the opposite side view ofthe same; Fig. 3, an elevation of the same, the view being at right angles to the views in Figs. 1 and 2 5 Fig. 4, a transverse central vertical section of one of the electromagnets employed on the in strument; Fig. 5, a side view, showing a modiiied construction of the instrument with my improvements.

Like letters designate corresponding parts in all of the figures.

The nature of my invention consists in producin g the motions for revolving the type-wheel, and for making the impressions of the types upon the paper, by the direct action of the armatures of the electro-magnets employed for the purpose, and in placing the said armatures under the downwardly-pointin g poles of the said magnets, so that the gravity of the said ZLI'IIIHUIIGS effects the reverse movements thereof without the use of springs or counter-weights, or of levers, or other intermediate means for applying such auxiliary devices; also, in the employment of tubular magnetcores, in which the armature-arms or rods for moving the type-wheel and for printing are located and have their longitudinal vibratory movement.

The drawing shows so much of a printing-telegraph instrument as is necessary to represent the features of my invention.

Let A designate the frame of the instrument or machine, having any suit-able and convenient form and construction; B, the typewheel; C, an electro-magnet for revolving the typewheel and D, an electro-magnet for making the impressions in printin First, in Fi 1 is most clearly shown my invention as applied to the type-whcel-revolvin g device. The electro-magnet G is suspended so that its poles point vertically downward, and the armature E is located underneath the same. The cores a a of the magnet are hollow or tubular,

having longitudinal holes in the center of each, to admit armature-arms or rods 1) b, which extend upward through the said cores, and are secured at their upper ends above the magnet to a cross-bar, c, which connects the two arms, and is adjustable up and down upon the same by nuts and screws (1 d, so that the distance which the armature descends from the poles of the magnet may be adjusted. The cross-bar or its connections rest on the magnet to sustain the armature at its lowest descent. From the cross-bar c a rod, f, extends upward, and is connected with one arm of a pallet-lever, g, whose vibrations turn an escapement-wheel, G, the action of the escapement being the reverse of that of a clockescapement; or any equivalent device producing the effect of this escapement may be employed. The escapement-wheel is secured to the shaft of the type-wheel B, and it is so arranged in relation to the said type-wheel that the descent of the magn et-armature, as well as its ascent, acting on the same, moves the type-wheel the distance of one type thereon, so that each breaking as well as each closing of the electrical circuit moves the type-wheel. Thus double speed is obtained in operating the instrument with a given number of letters, figures, fractions, monograms, and other characters on the typewheel compared with ordinary printinginstruments. To correspond with this construction and arrangement of the printing instrument the transmitting instrument should have a letter, figure, fraction, monogram, or other character on its indicator alternately opposite to a circuit-closing and circuitbreaking point following the same order as in the printing instrument. Instead of the armature-arms b 1) extending upward through the cores of the electro-magnet, they may be located outside of the legs of the magnet. Particularly, a single arm might extend upward between the legs of the magnet; but no arrangement is so simple, compact, and convenient as the one represented and above described, which has another advantage, when the armature-arms are made of soft iron, in

increasing the force of the magnet by its axial,

action thereon, for lifting the armature; or the type-wheel might be below the magnet and the armature lift from below to operate it also, the armature might vibrate on a center at one end instead of moving straight up and down.

Second, in Fig. 2 the invention is shown as OFFICE.

' ing themovement consists of apawl or claw, m, at-

adapted to printing upon the paper strip H. The construction and arrangement of the printing electro-magnet 1), its armature I beneath, and arimiture-arms h h extending up through the tubular cores 1' i of the magnet, and the adjustable cross-bar k above the n'lagnet, are the same as described for the type-wheel-revolving electroqnagnet above described. To the middle of the cross-bar k is attached the printing-pad or hammer I, which, when the electric circuit is broken and the armature I drops, allows room for the paper strip H to rest thereon out of contact with the type-wheel; but, when the circuit is closed and the armature drawn upward by its magnet, the said hammer presses the paper upward against the type, which is thenin position at the lowestpart of the type-wheel. The types are inked by an inking-roller, s, Fig. 3, or other suitable means. The descent of the armature I after each impression moves thepaper strip H alon a. proper distance, the armature being made heavy enough to produce the mechanical moven'ient necessary for the purpose. The device shown for producta ched to the armature I, and actingupon a ratchet-wheel, n, on the shaft of one of the two feedrollers, 0 j), between which the paper passes, the ratchet-wheel being prevented from a backward motion by an ordinary detent. The upper feedroller p maybe mounted in bearings r r pivoted to the frame, so as to cause the weight of the rollor to rest upon the paper and compress it upon the lower driving-roller o with sufficient force to move the paper along.

In Fig. 5 is represented a modification of the instrument. This consists in two type-wheels or drums, B L, on diiferent shafts parallel with each other, both wheels being in line with the paper strip. Each type-wheel shaft is turned by a separate electromagnet, which may, in turn, be brought into the single electric circuit by any suitable circuit-changer or switch. Each typewheel or drum may have one, two, or more peripheral rows of letters, figures, fractions, mono grams, or other characters composing its types, two rows being represented in Fig. 3.

Instead of the usual notation of fractions in stock quotations, any other arbitrary or monogramniic representation may be employed to indicate the same. For instance, instead of the fractions in} g i; the numerator numerals may be used, but the denominators may be expressed by the initial letters of the words meaning the same, thus, ,1, g,

The same construction and arran gem cut of electro-magnets and armatures as above described may be employed for repeating the motions in relays and local circuits.

In order to insure the most rapid and certain action of the magnets and prevent the clinging of the armatures to the poles thereof, when the circuit is broken I electroplate or otherwise plate the upper surface of the arn'iatures or the lower surfaces of the in agnet-poles with copper or some other metal not magnetically affected. This plating may be only of a very slight thickness.

Some other substances sutliciently durable and not otherwise objectionable may be substituted for the metal platin What I claim as my invention, and desire to secure by Letters Patent, is-

1. In a printing-telegraph instrument, the method of operatin the type-wheel and the printin g-pad bymeans of an armature placed beneath the poles of an electro-magnct and of a connecting-rod or rods, moved upward thereby in line parallel or nearly pa 'allel with the axes of the magnet, substantially as and for the purpose herein set forth.

2. The arrangement, within tubular electromagnet cores, of longitudiiially-vibrating armature-arms or cmmecting-rods, substantially as and for the purpose set forth.

\Vitnesses: ROB". II. GALLAHER.

J. S. BROWN, 1.). J. BnowN.

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