US42842A - Improvement in electro-magnetic telegraphs - Google Patents

Description

2 Sheets--Sheet L S. F. DAY.

Telegraphic Register.

No. 42,842. Patented May 24, 1864;

2 Sheets-Sheet 2. S. F. DAY.

Telegraphic Register. No. 42,842. Patented May 24,1864.

I; 1 I l illll mEw/aa 2 3 UNITED STATES;

PATENT OFFICE SAMUEL F. DAY, OF BALLSTON SPA, NEW YORK.

Specification forming part of Letters Patent No. 42,842, dated May 24, 1864.

. Improvement in Magnetic Telegraphs; and I do hereby declare the following to be a full,

clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, forming a part of this specification, in which' Figure 1 is a plan or top View of an indent ing registering-machine. Fig. 2 is a vertical longitudinal section through the same. Fig. 3 is an end view, taken on the left of Fig. 1.

This invention relates to a certain improvement in Morses electromagnetic telegraph, which dispenses with the use of local batteries and relays at the several stations on the line; and it consists in the adaptation to and combination of an indenting-register with the main line.

A is the base or stand, to which the several parts of the machine are connected.

B B are two electro-magnets, placed .in a Vertical position and surrounded bya frame or box, 0.

Disalever,witl1a pin or arm, a, projecting downward from its under side. This lever is attached to an arbor, b, and is centered between two thumb-screws, c c, which terminate in a standard, E. An adjustable thumb-screw with a steel point, F, is attached to that portlon of the leverD which is represented as being bent downward in the drawings. The opposite end of the lever terminates between a standard, G, provided with suitable thumb-screws, d d, for adjusting said lever according to the strength of battery on the main line.

It will be observed that the lever D is hung on the standard E at about two-thirdsitslength, taken from the right-hand end of said lever. A spiral spring, 6, is made to fasten on the arm or pin a of the lever D, the tension of which is regulated by a thumb-head, H, around the shaft of which a fine cord, f, is wound, said cord passing through the center of the standard Gr and connecting with the spiral spring 6.

The object of the spiral spring 6 is to withdraw the armature I from the electro-magnets B B when the circuit is broken.

This apparatus is provided with clock-work machinery for the purpose of feeding the paper continuously, similar to other telegraphmachines. It consists of two circular plates, J J, which form the sides inclosing the interior mechanism. These plates J J are secured together by three bolts, 9 h t', and heads 9, h,

and 'i.

spur-wheel N. The weight L sets in motion the spur-wheel Nand pinion 7a. This communicates motion to the spur-wheel O and pinions l and m. The pinion m is attached to a roller, P, which roller presses against another roller, Q. Both of these rollers are milled or slightly grooved on their surfaces, so as to prevent the paper from slipping while passing between them.

R is a guide, through which the paper y y I (shown in red lines) passes. This guide is provlded with an arrangement consisting of a ring,

a, and thumb-screw 0, for the purpose of regulating the width of the paper to be used. This guide is adjusted byascrew, p, which terminates in athumb-head S.

The axis of the roller Q rests in a slot, q, in each of the plates J J. In these slots are placed two metal pins, 1" 4*, which are kept close up against the axis of the said roller by the metal springs T T. The object of this arrangement is to keep the paper pressed tight between the rollers Q R.

The arrows in the drawings indicate the directions in which the several spur-Wheels and pinions revolve.

A device for stopping the machinery at any desired moment is shown at U.

r is an upright projection on the metal strip U, which metal strip works on the screw 8. When it is desired to stop the machinery the handle of the strip U is pushed out in the direction indicated by the red lines until it (the rod r strikes against a revolving fan or metal strip, V, fastened to the shaft t. This causes the machinery to stop instantly.

The operation and construction of the key W are the same as in Morses, and therefore need no description.

It will be seen by the drawings that the armature I is represented as being down on the electro-magnets B B or, in other words, the circuit is closed.

war are the two screw-cups to which the linewire is attached.

The operation is briefly as follows: The current passes along the wire from the screw-cup w to and around the coils of the electro-magnets B B; thencealong a wire to the insulated button o. Another wire connects with the screw-cup ac and the metallic portion w of the key W. When the key is-pressed down so as to strike the insulated button '0 the circuit is closed and the armature I is attracted to the magnets B B, thus forcing the steel point 1* into the paperyy and producing the required strokes or dots.

It is necessary to the success of the instrument, in a main-line current, that the fulcrum of the lever should be as near the end which carries the point for indenting the paper as is possible without bringingit so close as to prevent sufficient range, so as to enable the electro-magnets to exert a greater leverage.

By placing the fulcrum of the lever at the point above stated I double the effective power of the instrument, or nearly so. But this improvement alone is insufficient to accomplish the result sought successfully. In addition to,

and in combination with, this change, I employ a material change in the magnets used. Instead of making them of No. 22 wire and of a weight of from four to eight ounces of wire, I

use No. 32 wire, and increase the weight of this portion of the magnet to about twenty ounces, or from that to two pounds, of wire. I also increase the length of the cores to about three inches, and their diameter to three-eighths or one-half of an inch. By constructing my apparatus in this manner I am enabled to work an indenting registering-instrument in a mainline circuit of any ordinary length without the intervention or aid of a local battery; and by this means I entirely avoid the expense and trouble of the latter. This might perhaps be done by the change in the construction of the magnet without changing the lever from an equal beam; but I prefer to construct the lever in the manner described, as it very materially aids in the accomplishment of the result.

The combination, with a registering-instrument, of a magnet constructed as I have described enables the line-current to operate upon the instrument with great intensity, and this intensity well supplies the place of the volume derived from the local battery, by which it is now customary to work such instruments.

The object of this improvement being to work an indenting registering-instrument by the power of the main-line current, it is obvious that the nature and gist of the invention consists in giving to the parts such a construction as to cause this current to act upon the instrument with sufiicient intensity to properly indent the paper for ordinary business purposes, on a line of ordinary or equivalent construction and length, in such a manner as to be available for the ordinary purposes of telegraphing, and that the line of distinction between this invention and the old formand manner of construction is found in the adaptation of the instrument to the successful accomplishment of this purpose, of which it was before incapable.

I claim- Combining with an indenting telegraphic registering-instrument a magnet constructed according to the proportions described in the foregoing specification, or substantially so, so as to accomplish the result stated by means substantially the samethat is to say, so as to give sufficiency of intensity and power of action to produce uniformly-legible indentations in the paper, in an ordinary line-current, without the aid of a local battery, as hereinabove set forth.

SAML. F. DAY.

Witnesses:

DAVID MAXWELL, ABM. B. PEARCE.

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