US67410A - Improvement in telegraphic instrument - Google Patents

Description

S. G. CABELL. TBLEGRAPHIC INSTRUMENT.

No. 67,410. Patented Aug. 6, 186?.

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'ro ALL WHOM 1T MAY coNcERN;

Be it known that I, S. G. CABELL, of Quincy, in the county of Adams, and State of Illinois, have invented certain new and useful Improvements in 'Ielegraphic Instruments; and I do hereby declare that the following vis a full, clear, and exact description thereof,- reference being had to the accompanying drawings, making part of this speciiication, and to the letters of reference marked thereon, like letters indiea'tinglike parts wherever they occur.

To enableothers skilled in the'art to .construct and use my invention, I will proceed to describe it.

My invention consists in constructing a telegraph instrument with a. magnet ofia novel form, and so arranged in connection with the instrument as to combine both a receiving instrument and a sounder in one and tbe same instrument, and having them so arranged that they can be used separately or together at will.

Figure I is a side elevation of an instrument complete, ready for operation.

Figure 2 is a longitudinal section of the magnet; and

Figure 3, a transverse section on the line :c of tig. I.

I construct my improved magnet by winding the insulated wire Z on a central bar or tube of soft iron, as` represented by E, of iig. 2, and then enclose or surround the helix with o. tube, D, also of soft iron. This tube D is made considerably longer than the core E, and projects at the rear end thereof, leaving a cavity, which is filled by another helix, Z, wound on a similar core, F, the cores E and F being placed in the same plane, but having their adjoining ends separated by a small space, which is filled by a brass slidingepiece, i, which works to and fro through openings made for it in the sides o"the outer tube D. This slide h has a piece of soft iron, either solid or tubular, iilling a hole made through it at its central portion, as represented by z', this piece of iront' being of such a size that when the slide is shoved so as to bring it in line with the cores E and F, it will be in contact with the adjoining ends ot' each, and thus unite them.

The magnet, thus formed, is mounted on a stand on suitable restsb b, and enclosed by a stationary ring, C, in which it may be moved for a short distance to and fro, by means of a pinion, e. working in a rack, n, secured to the sheil D, the piniorbeing operated by a thumb-piece, a, as shown in iig. 2. To one end of the shell D is scoured a frame, o, in which is pivoted, at its bottom, a vibrating-arm` G, having an armature, t, attached to it, as shown in fig. l, the upper end of said arm G playing between and striking against the points of the set-screws 77 and r, held in position by a vertical arm, H, secured to the stand. `At theopposite end of the magnet another vertical arm, 7c, is secured tothe stand, and has pivoted to it another vibrating-arm, I, having an armature, u, secured thereto, said arm I playing between and striking agaiustset-screws fand g, as shown in iig. 1.

i Amagnet constructed on this plan is much stronger than the ordinary horse-shoe magnet, and it also loses its magnetism sooner than the ordinary horse-shoe electro-magnet when the electric current is broken;

and hence it can beA operated with great rapidity.

In using my instrument, A is the relay-magnet, and it operates the vibrating-arm I, which may be so finely adjusted as to produce but very little if any sound, as is usually the case when sending messages over a long line, or when the battery is weak. The connection between the main line, which operates the arm I by means of the magnet A, and the ylocal battery, which operates the sounder-arm G, is so made that the making and breaking of the current with both magnets A and B will be accomplished at one and the same operation, as is usual in the case of receiving instruments and Sounders;V and hence n-ll'vibrations ot` the arm I will be instantly duplicated or repeated by the sounder or arm G. By shoving the slide L so as to connect the cores E and F, the two magnets A and B are caused to operate as a single magnet, with its poles at the outer ends bf E and F, by which means the power of the magnet is increased and the sounder worked with more force.

It is obvious that the magnet maybe constructed on the same plan with two legs, like a horse-slice magnet,'

if desired; but the form here shown is simpler and cheaper, and is found amply suiiicient for all ordinary purposes.

Having thus described my invention, what I claim, is-

1. Operating a telegraph insdzrument by means ot' a. magnet consisting of ahelix interposed between two concentric pieces of soft iron, the inner forming a central core, and the outer one a covering for the helix, substantially as described. A

' 2. I claim the combination of the electro-magnets A and B with the connecting piece t, arranged so that, by`moving it to and fro, the magnets may be connected or disconnected at will, substantially as described.

3. I claim the combination ofthe magnet A, with its vibrating-arm I, and the magnet B, with its vibratingarm G, when arranged to forni one instrument, and to operate as and for the purposes herein set forth.

s. e. cABnLL.

Witnesses:

GEO. H. Gmnnn, GILPIN Moena,

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