Day v. Bankers' & Brokers' Tel. Co.

7 F. Cas. 217, 9 Blatchf. 345
CourtU.S. Circuit Court for the District of Southern New York
DecidedJuly 1, 1872
StatusPublished
Cited by1 cases

This text of 7 F. Cas. 217 (Day v. Bankers' & Brokers' Tel. Co.) is published on Counsel Stack Legal Research, covering U.S. Circuit Court for the District of Southern New York primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
Day v. Bankers' & Brokers' Tel. Co., 7 F. Cas. 217, 9 Blatchf. 345 (circtsdny 1872).

Opinion

BLATCHFORD, District Judge.

This suit is founded on reissued letters patent granted to Samuel F. Day, one of the plaintiffs, March 23d, 1869, for an “improvement in electro-magnetic telegraph,” on the surrender of original letters patent granted to him May 24th, 1864. The second claim of the patent is the only one in question in this. suit. The spéeifieation says: “This invention relates to a certain improvement in Morse’s electro-magnetic telegraph, which dispenses-with the use of local batteries and relays-at the several stations on the line; and it consists, in part, in the adaptation to, and combination of, an indenting register with the main line. Said invention also consists, in the arrangement, in combination with the other parts of the instrument, of a sounding-box, in the manner hereinafter set forth, by which the audibility of the sound produced by the blow of the registering lever is very much increased, thus enabling the operator-io catch the sounds with much greater facility, in case he desires to read a message by sound.” The specification then proceeds to-describe the construction of the apparatus, with references to the drawings. So far as the improvement covered by the second. d.aim is concerned, the arrangement is thisi There are two electro magnets placed in a-vertical position, and surrounded by a sounding box, C. D is a lever, with a pin or arm projecting downward from its under side. This lever is attached to an arbor and is--centred between two thumb-screws, which terminate 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 in the drawings as being bent downward. The opposite end of the lever-terminates between a standard, G, provided with suitable thumb-screws for adjusting said lever according to the strength of battery on the main line. The lever, D, is hung on-the standard, E, at about two-thirds its length, taken from the right hand end of' the lever. A spiral spring is made to fasten on the arm or pin of the lever, D, the tension of which is regulated by a thumb-screw, around the shaft of which a fine cord is wound, which cord passes through the centre of the standard, G, and connects with said spiral spring. The object of such spiral spring is to withdraw the armature on the lever, D, from the electro-magnets, when the circuit is broken. The apparatus is provided with clock-work machinery, to feed continuously paper which is to be marked by the indenting register. When the circuit is closed, and the armature is attracted to the magnets, the steel point, F, is forced into the moving paper, and produces on it strokes or dots. The specification then states, that it is necessary to the success of the instrument in a main line current, not only that the fulcrum of the lever, D, should be placed as near as practicable to that end of the lever which carries the steel point, F, but that the magnets should, instead of being made of No. 22 wire, be made [219]*219of No. 32 wire, and instead of being made of a weight of from four to eight ounces of wire, be increased to from twenty ounces to two pounds in weight, and that the length of the cores should bé increased to about three inches, and their diameter to three-eighths or one-half of an inch. The specification proceeds: “By constructing my apparatus in this manner, X am enabled to work an indenting registering instrument in a main line circuit of any ordinary length, without the intervention or aid pf 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 the improvement being to work an inaenting-registering instrument by the power of the main line current, it is obvious that the nature and gist of the invention consist 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 telegraphing, 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 be observed, that the fulcrum post, E, and the sounding post, G, are set upon the top of the box, C, 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 circumstances 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, is so attached to the sounding box, G, and the ether parts are so arranged in connection with it, that the blow is struck directly towards the box, in such a manner as to produce vibration thereof by direct action; that is to say, a tangential 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 of the blow direct, in producing the vibration and consequent sound. It is only in this way that the full effect of the blow, in producing the sound for reading the message, can be realized. I am 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 my invention, as the action pf the blow is not and cannot be direct, but is only incidental, and does not have that effect in developing sound from the box, which a direct blow would have.” The claims are these: (1.) “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 same, that 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 hereinbefore set forth.” (2.) “I also claim the arrangement of the sounding box, C, the lever, D, and the sounding post, G, of a magnetic telegraph, in combination with each other, in the manner hereinbefore described, and to the effect stated.”

The principal defence urged, in respect to the second claim of the patent, which is the only one alleged to have been infringed, is its want of novelty.

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Cite This Page — Counsel Stack

Bluebook (online)
7 F. Cas. 217, 9 Blatchf. 345, Counsel Stack Legal Research, https://law.counselstack.com/opinion/day-v-bankers-brokers-tel-co-circtsdny-1872.