USRE3335E - Improvement in electro-magnetic telegraphs - Google Patents

Description

- 2 Sheets-Sheet 1. S. P. DAY. ELECTROMAGNETIC TELEGRAPR,

INVENTORZ" Reissued Mar..v23;11869.-

vvwuEs -E 2 SheetsSheet 2.

SQF. DAY. ELECTROMAGNETIC TELEGRAPH.

No. 3,335. Eeissued Mar. 23, 1869. I

INVENTOR.

WITNESS E3."

v d ownward from its under side. 1 attached to an arbor, b, and is centered between two thumb-screws, c c, which terminate U ITED STATES- TEN OFFICE.-

SAMUEL F. DAY, OF BALLSTON SPA, NEWsYORK.

I'M PROVEM ENT. m ELECTRO-MAGNETIC TELIIEIGRAIPHS.

Specification forming partof Letters Patent No. I42,B 42,'dated May 24, 1864} Reissue No. 3,835, dated March-23,1869. P

.To all whom it may concern Be it known that I, SAMUEL F. DAY, of Bellston Spa, in the county of Saratoga and State of New York, have invented a certain I mprovement-in Magnetic Telegraphs and I do hereby longitudinal section through the same. Fig. 3

is an end view taken on the left of Fig. 1.

This-in vention relates to a certain improvemeut in Morses electromagnetic telegraph,

which. dispenses with the use of local batteries and relays atthe several stations on the line; and it'consists, in part, in the adaptation to and combination of an indenting-register with the main line.

I Said invention also consists in the arrange ment, in combination with the other parts of theinstrument, of a sounding-box in the inanner hereinafter set forth, by which the audibility of the sound produced by theb'low ofthe registering-lever is very much increased, thus enabling the operator to. catch the sound s with much greater facility in case he desires to read a message by soun A is the base or stand to which the several parts of the machine are connected.

B B are two electro-maguets, placed in a vertical position and surrounded by a sounding-box, C.

D is a lever,wi th a pin or arm, a, projecting This lever is in a standard, E. An adjustable thumb-screw with a steel point, F, is attached to that portion of the lever D which is represented as being bent downward in the drawings. The opposite end of the lever. terminates between a standard, G, provided with suitable thumbscrews, d d, for adjusting said lever accordingto 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-thirds its length,'taken from the right-hand end ofsaid lever.

A spiral spring, e, is made to fasten on the .arm or pin a of the lever D, the tension of The object of the spiral spring 0 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 th'e paper continuously, similar to other telegraphmachines. I 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 'i, and heads 9! h i'.-

K is a barrel, around which the cord's'uspending the weight L is wound. To this bar rel K is attached a ratchet-wheel, M. 1 N isa spur-wheel situated just behind the ratchet-wheel M. I

0 is a metal spring, which. presses against a pawl, j, both of which are fastened to the spur-wheel N. The weight 11' sets ininotion the spur wheel N and pinion This communicates motion. to the spur-wheel 0 and pinions land "The pinion m is attached to a roller, P,'whieh 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 siippingwhile passing between them.

R is a guide through which the papery 3 (shown in red lines) passes. This guide is provided with an arrangement consisting of a ring and thnrnb-screw, o, for the purpose of adjnsting it to the width of'the paper to be used. This guide is adjusted by a screw, 11, which terminates in a thumb-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' T, which are kept close up against the axis of the said roller by the metal springs T T. The object of thisarrangement.

is to keep the paper pressed tight betweenthe rollers Q R.

The arrows in the drawings indicate the di pinions revolve. i

rections in which the several spur wheels and 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 asin Morses instrument, 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. 7

a: w 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, along a wire to the insulated button 11. Another wire connects with the screwcup w, and'the metallic portion 10 of the key W. When the key is pressed down so as to strike the insulated button o the circuit is closed and the armature I is attracted to the magnets B B, thus forcing the steel point F into the paper 3 y and producing the required strokes or dots. It is necessary to the success of this 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 bringing it 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 eli'ective power I of the instrument, or nearly so; but this improvement alone is insufficient to accomplish the result sought suceessfullyj In addition to,

and in combination with, this change I employ amaterial 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 magnets to about twenty ounces, or from that to two pounds, of wire. I also increase the length of the cores to about three in ches and their diameter to threeeighths or one-half of an inch.

. By constructing my apparatus in this manner I am enabled to work an indenting registering-instrument in a main-line circuit of any ordinary length without the intervention or .aid of a local battery, and by this means-I en'- tirely 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 registcring-instru ment, 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 the 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 sufficient 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 telcgraphing, and that the line of distinction between this invention and the old form and manner of construction is found in the adaptation of the instrument to the successful accomplishment of this purpose, of which it was before incapable.

It will also be observed that the fulcrumpost E and the sounding-post G are set upon the top of the box 0, instead of being attached directly to the bed-plate of the machine, as in the construction now in common use.

The object of this improvement-is to make the sound produced by the blow of the lever more audible, which result it accomplishes in a very satisfactory manner, thus enabling the operator, if qualified, to read by sound, if desirable, under circum stances in which it would otherwise be difficult if not impossible;

It will be observed that the sounding-post or part upon which the blow is struck isso attached to the sounding-box G, and the other,

parts are so arranged in connection with it, that the blow is struck directly toward the box in such a manner as to produce vibration 1 thereof by direct actiou--that is to say, atangential'line drawn from the arc in which the armature vibrates at the point at which the blow is given would intersect the box, making the action ofthe blow direct in producing the vibration and consequent sound. It is only'in this way that the full efl'ect of the blow in producing the sound for reading the message can be realized.

Lam aware that an instrument has before been constructed in which the coils have been placed longitudinally above a similar box, and the blow struck in a line parallel to the top of the box and passing outside of and above said box; but this does not accomplish the purpose of-m y invention,.as the action of the blow is not and cannot be direct, but is only inci-- dental, and does not have that effect in developing sound from the box which a direct blow would have. a

I claimf 1. 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 v Jana;

substantially the same-that, is to say, so as to give sufficiency of intensity and power of action' to produce uniformly-legible iindentations in the paper in an -ordinary line-current without the'aid of a ld'ca-l battery, as hereinabove set forth.

2. The arrangement of the's'ounding-box 0', the lever D, and the s unding-post G of a.

magnetic-telegraph in combination with each other, in the manner hereinbefo're described, an i'to the efi'ect stated.

SAML. DAY.

Witnesses Y DAVID MAXWELL,

P. W. BARTHOLOMEW.

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