181 F. 345 | 3rd Cir. | 1910
The patent in suit is for a blue print machine. As specified in the patent, the device consists in an upright glass cylinder or frame, around which are wrapped the drawing to be copied and the sensitized paper to which it is to be transferred; the two being, icept in intimate contact by a canvass envelope or cover drawn down over them. The printing is done by electric light, and this is supplied by an arc lamp suspended immediately over the open top of the- cylinder, on a cord and pulley, by means of which it is let down into the cylinder to do the printing. As the lamp moves down the axis of the cylinder, it is at all times equally distant from the paper to be printed upon, and thus affects all parts of it equally. And being allowed to descend by a. controlled and even motion, regulated ,by a clockwork attachment, and the- current being cut off automatically, immediately upon the lamp reaching the bottom, not only is the printing done evenly, as it proceeds, but there is no over printing, such as results where the light is not cut off as soon as the operation is completed. The cut-off device, as described in the patent, consists of a self-opening trip-switch inserted in the electric circuit, which is held in closed position during the printing operation, by means' of a catch or stop mounted on the frame of the switch, which is disengaged so as to open the' switch and break the circuit, when a counterweight to
If Fullman, the patentee, was the original inventor of a device of this character, there can be no question as to his right to be protected in it, and, so far as the patent was found to be expressive of the invention, it no doubt would be valid. It appears, however, that the principal part of the present apparatus was the work of one Hall, a British inventor, who patented it in England in 1897, and that Full-man got his ideas from this, the only new feature which he introduced being the automatic cut-off, to put out the light when the process was completed, this being done by hand in the Hall apparatus. The novelty of the device is thus made to depend on this added feature. That it is important to have the light cut off at just the right moment must be conceded. Not only is electricity economized and over printing avoided, but, being automatically regulated, the exact amount of exposure desired is secured, and the operator is able to dismiss it from his attention, once the apparatus is set in motion. But unfortunately for the inventor an automatic cut-off was not new in photographic printing, being shown in the Urie photographic printing machine (1892), in the Schwarz (1898), as well as in the earlier British patent (1897) to Suter. In the Urie apparatus electric light is used, the same as in the patent in suit; the fact that it is incandescent instead of arc being immaterial; and the current is automatically cut off and turned on by a switch, in the form of a contact plate, located on the power shaft by which the machine is operated, and rotated by it, intermittent electrical connection being thus brought about, and the lights turned on and turned off, according to established periods in the cycle of the machine. In order to shorten or lengthen the electrical connection, the plate is made in two sections, which are adjusted on each other circumferentially, and are held together by a suitable clamping screw. So in the Schwarz machine, where electric lights are also used, provision is made for lighting and extinguishing them automatically, the current being alternately established and broken, coincident with the exposure desired, „by means of cams directly connected with and operated by the mechanism and motive power by which the different sections of the sensitized paper are moved forward successively to receive impressions. In the Suter, also, there is an automatic cut-off, of some intricacy, which, although operated by independent motive power, is so co-ordinated with the other parts of the apparatus that, as each section of the sensitized paper is brought into operative position, an electric light below it is automatically turned on, and is again turned off when the printing is completed. The distinction is attempted with regard to these machines, that they are found in the photographic, and not the blue printing, art, and the refinement is even indulged that progressive blue printing is an art by itself. But photographic copying or light printing is all one; photography and blue printing being simply different phases of it. Nor is progressive blue printing anything apart. In each the plate or tracing which carries the picture or figure to be transcribed is exposed to the light which filters through it, transferring it by the effect of light and shade to the sensitized paper prepared to receive it. That blue prints could be successfully made on the
An examination of the patent, however, discloses that, as to a majority of the claims which are relied on,
The invention not being able therefore to be asserted broadly, the claims in controversy where this is done are invalid and the patent to that extent cannot be sustained. Nor is the complainant bettered if the cut-off described in the specifications is read into the claims in order to save them, assuming that this can be done, the defendants in that case not infringing upon them, their device in this respect not being the same.
It remains to consider the effect to be given to the fourth claim, as to which, as already intimated, no objection can be made. One of the elements which is there declared for, however, is “a governing ap
It results, therefore, that, however considered, the complainant’s case is without merit, and that the decree must be reversed with directions to dismiss the bill on the ground of noninfringement, with costs.
The following are the claims of the patent referred to.
(1) In an apparatus for copying or reproducing drawings, etc., the combination of a cylinder, means to support the subject-matter to be copied or reproduced upon the exterior of said cylinder, an arc-lamp adapted to be lowered into the interior of said cylinder, and means to automatically break the circuit for the purpose of extinguishing the light.
(3) A printing frame and a lamp, movable one in relation to the other, in combination with an automatic device to cut off the light upon the completion of the printing process.
(3) In an apparatus tor copying drawings, etc., the cylindrical printing-frame, the suspended electric arc lamp and means for controlling its descent within the frame, an electric switch controlling the light-circuit, and means for automatically opening the switch when the lamp has completed its travel.
(4) In an apparatus for copying drawings, etc., the .cylindrical support for the drawing, a suspended lamp arranged to descend axially within the frame, a governing apparatus for controlling the descent of the lamp, and the automatically-operated switch controlling the light-circuit.
(5) In an apparatus for copying or reproducing drawings, etc., the combination of a cylinder adapted to be rotated, means to support the subject-matter to be copied or reproduced upon the exterior of said cylinder, an arc-lamp adapted to be lowered into said cylinder, and means to automatically break the circuit for the purpose of extinguishing the light.