Miller v. Bridgeport Brass Co.

17 F. Cas. 309, 14 Blatchf. 282, 3 Ban. & A. 20, 1877 U.S. App. LEXIS 1877
CourtU.S. Circuit Court for the District of Connecticut
DecidedAugust 11, 1877
StatusPublished

This text of 17 F. Cas. 309 (Miller v. Bridgeport Brass Co.) is published on Counsel Stack Legal Research, covering U.S. Circuit Court for the District of Connecticut primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
Miller v. Bridgeport Brass Co., 17 F. Cas. 309, 14 Blatchf. 282, 3 Ban. & A. 20, 1877 U.S. App. LEXIS 1877 (circtdct 1877).

Opinion

SHIPMAN, District Judge.

This is a bill in equity to restrain the alleged infringement, by the defendants, of reissued letters patent, which were issued on January 11th, 1876, to the plaintiffs, as assignees of Joshua E. Am-brose, for an “improvement in lamps.” The original Ambrose patent was dated October 16th, 1860, and was reissued May 20th, 1873, and the patent, as reissued, was extended for 'seven years from October 16th, 1874. The principal defences are, that the reissue is not for the same invention which was described and claimed in the originál patent, and that the patent is void for want of novelty.

Tn the original patent, the patentee declared the object of his invention to be, to obtain a lamp which will burn, without a chimney, and without danger of explosion, those hydrocarbons which are volatile, and contain an excess of carbon, and stated that the invention consists in the employment or nse of a perforated cap, vapor tube, heaters and deflecting plate, arranged,” as described, and in a wick-adjusting mechanism, which last-named element is immaterial in this case.

In the specification, the invention was, in substance, described to be the upper part of the body of a lamp, which received at its upper end a cap, C. This cap was of cylindrical form, and might be constructed of perforated sheet iron, the upper end having a perforated plate, c, fitted in it. The wick tube was within the cap or perforated cylinder. Adjoining the wick tube was a tube, F, the lower end of which communicated with the interior of the body of the lamp, the upper end of said tube being covered by the perforated plate, c. On the upper end of the cap, C, was placed a copper, dome-shaped heater, G, slotted at its upper end. A longitudinal bar in the centre of the slot divided it into two parts. The specification proceeded: “The wick tube, E, extends some distance above the perforated plate, c, and, on its upper end, a collar, p, is fitted, said collar having plates, q. projecting from it, slightly inclined from a horizontal plane. Between the inner ends of the plates, q, and the collar, p, there are openings, r. On the outer side of the heater. G, there are vertical ribs, s, at the lower ends [310]*310of which there are projections, t These projections, t, serve as bearings for a heater, H, which is similar to G, in form. The ribs and projections, t, admit of a space, u, being between the two heaters, and the upper end of the heater, H, is slotted, as shown at v, and has a plate, w, extending upward for each end of it, and inclined at an angle of about 45°. The tube, F, admits of all vapor generated in the body, A, of the lamp, escaping up into the heater, G, and to the flame, the perforated plate, c, preventing the ignition of the vapor below the orifice of the tube. The plates, q, of the collar, p, and the openings, r, cause a draught to ascend directly upward to the flame, and air is also deflected directly against the inner sides of the heater, G, and becomes intensely heated, so as to supply the flame with warm oxygen. The bar, o, in the slot, n, of heater, G, serves to divide the flame, and prevents it from ascending up through the slot n, before the carbon is consumed. Between the two heaters, G, H, oxygen passes and becomes highly rarified, and unites with the carbon in the flame, insuring perfect combustion. The plates, w, at the ends of the slot, v, of heater, H, serve to spread the flame and diminish its height, thereby keeping the flame at the point where the heat is most intense. The flame at the slot, n, in heater, G, is merely a gas-generating flame, the illuminating flame having its base at the slot, v, of fieater H. By this arrangement the flame is supplied with sufficient oxygen, without a chimney, to support proper combustion and produce a brilliant illuminating flame, and the vapor which passes up through tube, F, is consumed without danger of being ignited below the orifice of said tube.” The patentee, after stating that he was aware that dome-shaped heaters had been previously used, and, also, that perforated caps had been used in connection with said heaters, and disclaiming said parts when separately considered, claimed as his invention, “1st, the arrangement of the heaters, G, H, with a space between them communicating directly with the external air, in connection with the collar, p, and plates, q, q, fitted on the top of the wick tube, E, and the perforated cap, 0, substantially as and for the purpose set forth; 2d,in combination with the parts aforesaid, the vapor tube, F, placed within the cap, C, and adjoining or contiguous to the wick tube, as and for the purpose specified.”

[309]*309[Drawing of Patent No. 30,381, granted October 16, 1860, to J. E. Ambrose, published from the records of the United States patent office.]

[310]*310This lamp was not a success, as a lamp which would bum without a chimney, and did not go into general use, but it contained valuable features. The tube, F, conducted the gas from the fount to a point near the end of the wick tube, so that the gas was conveyed to the flame and was consumed, and thus the danger of explosion was materially diminished. In addition, the upper part of the perforated cap, C, was a minutely perforated plate, or disk which extended transversely over- the entire top of the cap, below the flame, (forming the floor of what is styled, in the reissued patent, the combustion chamber,) and prevented the return of lighted gas to the lamp fount below, or the ignition of gas within the cap, C, upon the principle of Sir Humphrey Davy’s safety lamp. Thus, the combination of the tube and the perforated plate prevented danger of explosion. The perforated plate also performed the- office of a distributer of air into the space where the wick was lighted and to the flame.

Lamps having these characteristics, in connection with the other well known parts of volatile oil lamps — a wick tube, a dome-shaped chamber, which serves to direct the air to the flame, and is generally called a deflector, and a chimney, were subsequently manufactured by the owners of the patent, and went into general use. The patent was reissued for the second time, in 1S76. The specification of the reissue declares that the invention consists, secondly, “in combining, in a lamp burner, a deflector, a perforated air distributer, with the deflector, forming the combustion chamber, a wick tube extending from the fount to the combustion chamber, an adjusting device to regulate the elevation of the wick, and a tube to conduct the gas from the fount to the chamber above the air distributer.” The descriptive portion of the reissued specification does not substantially differ from the language of. the descriptive portion of the original specification. In the new specification prominence is given to the perforated plate c, which is called “a perforated air distributer, which, with the deflector, forms the combustion chamber.” The second claim, which is the only one which is alleged to have been infringed, is as follows: “2. The combination, in a lamp-burner of the following elements: first, a deflector; second, a perforated air distributer, which, with the deflector, forms the combustion chamber; third, a wick tube, extending from the fount to the combustion chamber; fourth, a tube, or passage, to conduct the gas from the fount to said combustion chamber, substantially as described.”

The lamps made by both plaintiffs and defendants contain the heater, G, without the ribs or projections or longitudinal bar; in other words, an ordinary deflector, the perforated plate, the vapor tube, and a wick tube; and are in great demand by the public.

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Related

Miller v. Brass Co.
104 U.S. 350 (Supreme Court, 1882)

Cite This Page — Counsel Stack

Bluebook (online)
17 F. Cas. 309, 14 Blatchf. 282, 3 Ban. & A. 20, 1877 U.S. App. LEXIS 1877, Counsel Stack Legal Research, https://law.counselstack.com/opinion/miller-v-bridgeport-brass-co-circtdct-1877.