US2504300A - Ruling device - Google Patents

Description

April 18, 1950 R. J. CASHMAN 2,504,300

RULING DEVICE Original Filed Feb. 9, 1944 INVENTOR.

* otimzym Patented Apr. 18, 1950 RULING DEVICE Robert J. Cashman, Glenview, Ill., assignor, by mesne assignments, to Research Corporation, New York, N. Y., a corporation of New York Original application February 9, 1944, Serial No. 521,594. Divided and this application August 31, 1948, Serial No. 47,019

2 Claims.

1 This invention relates to a device for ruling grid lines on the interior surface of a cylindrical envelope, such as used for photocells and other like electrical apparatus, and the principal oblaterally extending trunnion pins 96, which are adapted to snugly seat within notches 9'! provided along the upper surface of the semicylindrical bearing iii. The notches are spaced ject of the invention is to provide a device of 5 apart a distance corresponding to the distance this character which is simple in construction desired between grid lines, which, preferably, is and yet permits the grid lines to be laid down about one-fifteenth of an inch. with speed and accuracy. The cell which is to receive the glld ruling is The present application is a division of my clamped to the base 96 by adjustable clamps 98, earlier application filed February 9, 1944, Serial l0 which firmly hold the envelopes St in an appro- No. 521,594, which has matured into Patent No. 'priate position to receive the end of the arm S i 2,448,517, issued September '7. 1948. and the bow pen 95. The lines are ruled onto Further and other objects and advantages will the interior surface of the envelope 89 by robecome apparent as the disclosure proceeds and tating the arm 9% and shaft 35 in the associthe description is read in conjunction with the ated bearing 92, and a handle Hit is provided accompanying drawings in which for convenience of manipulation. After a grid Fig. 1 is a plan view showin a preferred form line has been ruled, the bearing 92 is moved of the ruling device; rearwardly a notch and the next line ruled, and

Fig. 2 is an elevational view of the same; and the procedure continues until the desired num- Figs. 3 and 4.- are vertical sectional views taken ber of lines has been ruled to produce a cell of on the line 33 and 4-4 of Figs. 1 and 2 rethe desired resistance values and target area. spectively. In using Aquadag, or any similar conducting Referring now to the drawings, the reference material, the suspension should be as concencharacter 99 designates a photocell in the proctrated as possible without interferin with proper ess of fabrication and it comprises a glass en fiowage of the material through the bow pen 95. velope upon the interior cylindrical surface of I claim: which a photo-conductive material such as de- 1. Apparatus for ruling lines at fixed interscribed in my prior application hereinbefore revals upon the interior cylindrical surface of an ferred to is applied over the fine conducting grid. envelope comprising means for rigidly holding The grid comprises a plurality of parallel conthe envelope, a rotary member provided with a ducting lines, alternate ones of which are inruling device at one end adapted to project into terconnected to form opposite sides of an electhe envelope, a hollow cylinder rotatably suptrical circuit with the photo-conductive element porting the other end of said member, and means interposed as a resistance element between the for fixing the longitudinal position of the mem intercalated grid lines. All of this is described her within the envelope at regular intervals along in my prior application before referred to and the axis of the envelope, said last-named means need not be further described here. comprising a semi-cylindrical guideway adapted The grid lines are preferably formed of a mato receive said cylinder and having notches reterial known as Aquadag, manufactured by cessed along its side walls corresponding to said the Atcheson Colloidal Graphite Company of 4 intervals, and trunnions projectin from the cyl- Port Huron, Michigan, this product bein an inder selectively engageable with said notched reaqueous colloidal graphite suspension. Other cesses. materials may be used, as for example, a graphite 2. Apparatus for ruling lines at fixed intervals pencil. upon the interior cylindrical surface of an en- Whcn the grid is applied to the cell by ruling, velope comprising means for rigidly holding the it is convenient to use the device shown in Figs. envelope, a rotary member provided with a rul- 1 to 4 inclusive. This device consists of a 'base ing device at one end adapted to project into the 99 having a semi-cylindrical bearing 9| at one envelope, a hollow cylinder rotatably supporting end adapted to receive a relatively heavy hollow the other end of said member, and means for cylinder 92 within which a shaft 35 is rotatably fixing the longitudinal position of the member supported by adjustable stop collars 86 and 81. The shaft is hinged at 93 to an arm $4 carrying a bow pen or other marker 95 at its extreme end. The cylinder 92 is provided with within the envelope at regular intervals along the axis of the envelope, said last-named means comprising a semi-cylindrical guideway adapted to receive said cylinder and having notches re- REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Number Name Date 4 Monro Jan. 12, 1915 FOREIGN PATENTS Country Date Denmark Dec. 11, 1905 Germany Oct. 8, 1912 Austria Aug. 25, 1913

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