US784473A - Blue-printing machine. - Google Patents

Description

No. 784,478. PATENTED MAR. 7, 1905. E. T. COPE.

BLUE PRINTING MACHINE.

APPLICATION FILED JULY 7,1904.

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No. 784,473. PATENTED MAR. 7, 1905. E. T. COPE.

BLUE PRINTING MACHINE.

APPLICATION FILED JULY 7,1904.

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PATENTED MAR. 7, 1905.

E. T. COPE. BLUE PRINTING MACHINE.

APPLICATION FILED JULY 7,1904.

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R r m m J m r u M 3. w 7% 5 J Q N a J 9 I 6/ l 7 J 3 F u I a 0 8 M Z \I V l \5 Patented March '7, 199:3.

UNITED STATES PATENT O ETcE.

EDGE T. COPE, OF SALEM, OHIO, ASSIGNOR OF ONE-HALF TO BUCKEYE ENGINE COMPANY, OF SALEM, OHIO, A CORPORATION OF OHIO.

BLUE-PRINTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 784,473, dated March 7, 1905.

Application filed July '7, 1904. Serial No. 215.575.

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Ie it known that 1, EDGE T..Corn, of Salem, in the county of (lolumbiana and State of Ohio, have invented a new and useful Blue-Printing Machine, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a perspective view of my improved machine. Fig. 2 is a detail side elevation, on a larger scale, showing one of the rollers. Fig. 3 is a broken cross-section showing the arrangement of the roller and curtain. Fig. 4 is a top plan view of the ratchet-feed mechanism for the lamp, and Fig. 5 is a front elevation of the feed mechanism.

My invention relates to that class of blueprinting machines wherein the transparentcylinders are provided with the curtains which are moved around the cylinder to hold the tracings and sensitized paper in place.

The object of the invention is to provide a simple and effective rope system for the rollers, to improve the grooved portions of the rollers on which the ropes wind, and to provide an improved feed mechanism for the lamp.

In the drawings, 2 represents a transparent glass cylinder, preferably made in two longitudinally-divided parts and supported by a frame consisting of upper and lower rings 3 and 4, connected and spaced apart by two posts 5 and 6. This frame may be mounted on suitable legs 7 to support the glass cylinder in vertical position. Between the posts 5 and 6 on each side of the cylinder I provide rollers 8 8, which are similar in character. Each roller is provided with cylindrical metal end pieces 9 and 10, provided with helical grooves which extend, respectively, in a right and left hand direction at the opposite ends in order to bring the wire cables or ropes 11 and 12 as far apart as possible. Each of these cables is secured to the outer portion of the groove, and these cables extend around the cylinder to upper and lower pulleys 13 and 14, mounted on one of the posts, and thence down to a weight 15. This weight partially counterbalances the roller, to which is secured one end of the curtain 16, of canvas or other material, this curtain winding on the roller in opposite direction to that of the cables. I preferably secure the ends of the curtain by recessing the posts and the roller and forcing the end portions of the curtain into these recesses by strips 17 and 18, secured by screws 19. The lower ends of the rollers are preferably provided with hemispherical bearingpieces 20. which bear on the rings to support the rollers and allow of there being easily moved around the cylinder. \Vith the weight and rope connections and the friction on the cylinder the rollers may be moved around the cylinder and will remain in adjusted position to cover the tracings or negatives and sensitive paper and hold them against the cylinder. Each curtain is of suflicient length to cover one-half of the complete cylinder, the weights holding the curtains and rollers in contact with the cylinder with a yielding pressure.

The lamp 21 is suspended by three cords, two of which, 22 and 23, lead over pulleys 2A and 25 to a cord 26, which extends down within the hollow post 27 to a weight 28. Another cord, 29, leads over pulley 24C and small pulley 30 to a drum 31, carried on a shaft mounted upon the hollow post. The drum is provided with an actuating-hamlle 32, and 'the drumshaft carries a ratchet-wheel 33, forming an escapement with the pawls 35 and 30. These pawls are pivoted to the two-armed lever 37, secured to a stub-shaft 38, mounted on the plate or bracke 39 and having secured thereto the weighted pendulum IO. The pawls are alternately lifted during the rocking movement by latches II and 42, moving over suitable adjustable pins a3, and both latches may be lifted by the hand-cord I I. During the lowering of the lamp, which overweights the weight 28, the ratchet rotates in a counter clockwise direction, the descent being regulated by the escapement.

The advantages of my invention result from the manner of connecting the rollers to the weights, the arrangement of the helical grooves on the rollers, and the use of the weight and eseapement mechanism for giving rangements of the parts without departing from my invention.

1 claim- 1. In a blue-printing machine, a curved transparent surface, a curtain secured at one end, a roller on which the curtain winds, and

weighted cables arranged to yieldingly hold the curtain in contact with the surface; substantially as described.

2. In a printing-machine, a transparent surface, a curtain secured at one end, a roller on which the curtain winds, said roller having a right-hand helical groove at one end and a left-hand helical groove at the opposite end, and cables winding in said grooves; substantially as described.

ing at the lower end of the roller, and a ringshaped support on which the bearing moves; substantially as described.

l. ln a blue-printing machine, acylinder of transparent material with a plurality of posts, a plurality of curtains secured to said posts, movable rollers over which the curtains wind, and cords arranged to wind upon the rollers and extending over pulleys to weights, substantially as described.

In a printing-machine, aframe support ing a curved transparent surface, a post extending upwardly from the frame, a lamp, a cord extending from the lamp over a pulley on the post and to an escapement mechanism mounted on the same frame, and a counterweight l'or the lamp; substantially as described.

6. In a printing-machine, a frame having a curved transparent surface, a hollow post projecting upwardly therefrom, a lamp having cords extending over pulleys at the top of the post, one of said cords extending down within the hollow post to a weight therein, and the other extending to an escapement mechanism 1 carried on the post; substantially as described. 3. In a printing-machine, a transparentsurface, a movable curtain-roller, a curved bear- 1 .In testimony whereof I have hereunto set my hand.

EDGE 'l. COPE. \Vitnesses:

C. H. \VEEKS, C. F. ToL'rzmN.

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