US848330A - Printing-press. - Google Patents

Description

' .PATENTED MAR. 26, 1907.

' P. A. VENNEY PRINTING PRESS.

APPLICATION FILED APR. 20. 1905;

UNITED I STATES PATENT OFFICE.

FELIX A. VENNEY, OF DALLAS, TEXAS.

PRINTING-PRESS.

Specification of Letters Patent.

Patented March 26, 1907.

Application filed April 20, 1905. Serial No. 266,644.

To all whom it may concern:

Be it known that I, FELIX A. VENNEY, a citizen of the United States, residin in the city of Dallas, county of Dallas, and tate of Texas, have invented certain new and useful with a power-shaft and its backward move-.

ment by engagement of the same pinion with another rack-bar in a plane below that which the pinion has when in engagement with'the bed-plate rack-bar, and my invention also relates to printing-press movements in which the pinion referred to has a planetary move ment about a two-sided rack-bar for the purpose of producing the backward-and-forward movement of the bed-plate of the machine.

The object of my invention is to substantially increase the rapidity of the reciprocation of a printing-press bed-plate and at the same time substantially reduce any jarring thereof or other parts of the machine and to accomplish these ends with an entire absence of all shaft and gearing mechanism.

. With these ends in v1ew my invention consists of certain features of novelty in construction, combination, and arrangement of parts by which said objects and certain other objects are hereinafter attained, all as fully described with reference to the accompanying drawings and hereinafter pointed out in the claims.

In said drawings, Figure 1 re resents a longitudinal section through the ed-plate of a printing-press and propelling mechanism therefor embodying my invention; Fig. 2, a vertical transverse section on the line 2 2 of Fig. 1 and more particularly showin the 10- cation of the pipes su plying the me ium for actuating the pro el ing devices, and Fig. 3 a side elevation 0 a steam-chest adapted for the urposes of my invention and more particuiarly showing the means for reversing the slide-valves thereof at the limit of each movement of .the bed-plate.

Similar characters of reference indicate the same parts in the several figures of the dr s.

4 indicates a suitable frame of any ordinary construction adapted to support a printing-press bed-plate 5, which in operation has and must have a back-and-forth reciprocation on said frame, and to which end see Fig. 2. The bed-plate is provided with the usual bearing 6, ntting in and confined by corresponding depressions or grooves in the upper ed e of the frame,'which bearing,

however, if esired, may be ball-bearers or any other well-known form of bearings commonly employed for similar purposes in printin resses.

Rfgidly secured tothe under side of the bed-plate by roject' fia es 8 8 (see Fi 2) by bolts 9 i s a cylin er 1llin which worl s a piston 11, secured to a piston-rod 12, passing through an ordinary stufiing-box 13 and secured against movement b being ro- 'ected into a suitable head 14, in which 1t is eld by means of a screw 15 or other suitable device. The cylinder is or may be actuatedby steam, air, water-gas, or other medium alternately introduced between the piston and the opposite ends of the cylinder, and

whereby t e bed-plate is not only reciprocated in both directions, but may be with a rapidity almost without limit, while at the same time it is cushioned at the limit of each stroke by the gas or other medium em loyed between the iston ends and the cylinder, with the result that there is absolutely no jar or sudden objectionable sto ping of the bed-plate at the limit of eithero the strokes.

The mediums or material supplied to the cylinder is conducted (see Fig. 2) to a steamchest 16 by means of a pipe 17, which steamchest is suspended. by means of strapslS 18 or other suitable means, from the cylinder 10 and connected therewith by means of pipes 19 20, opening through the opposite ends of the cylinder. The steam-chest is provided with an ordinary slide-valve 21, adapted to alternately open the ports 22 and 23, the exhaust being discharged through the pipe 23*.

As a simple and effective means for shifting the valve at the limit of the movement of the bed-plate said valve has secured thereto at one end by screw threading or other means a rod 24, projecting through a stuffing-box 25 and having pivoted thereto a lever 26, which in turn is secured on a fixed pin or shaft 27 at a point intermediate the ends of the lever. Lever 26 is in the path of and therefore adapted to engage, at the limit of its back stroke, for example, a pin 28, se' cured to some stationary portion of the frame of the press, and at the limit of its forward stroke with a similar pin 29, likewise secured to some fixed part ofthe machineas, for example, to across-bar thereof.

The operation of the bed-plate of a printing-press by means of asliifting power-cylinder supporting or supported by the bedplate-that is to say, secured theretonotthe cylinder and of the very best possible characterfor securing an entire absence of bldws'or jerks tending to jar the bed-plate or between any of theparts connecting it with its source of power or which produce an bojec tionable' noise,and, furthermore, I am thereby enabled to dispense with expensiveand complex gearing not only for actuating the bed-plate, but other portions of-a printingress deriving their power through the me iurn of the bed-plateas, for example ,the printing cylinder or roller 3 1, which obviously may be actuated solely by frictional" contact 7 with the bed-plate.

' Myinvention is'not limited to the employment of the particular form and construction of steam-chest and valve mechanism shown nor to the employment of the lever and stops for mechanically automatically shifting the valves at the respective limits of the movement of the power-cylinder, for obviously other well-known structures may be employed for the same purpose and secure the same results.

It proper to observe thatTthe. steam- Having described my invention, what I claim, and desire to secure by Letters Pat.- ent, is f y l 1. In a printing-press the combinationwith a bed-plate, a power-cylinderlsecured thereto, a fixedpiston and plston-rodthere for, a valve mechanism, means connecting said mechanism with each end of'the cylin der, a rod secured to saidvalve Ine'chanism, a lever pivoted to said rod, and sto s in the path of said lever, substantially as escrib'edi 2. In a printing-press the combination with a bed-plate, a power-cylinder secured to said bed-plate, a fixed piston and pistonrod therefor, 'a' sliding-valve mechanism, pipes connecting said -mechanism, respectively with eachend of said cylinder,'a rod secured to said valvemechanism, alev'er pivoted to said rod and stops in thepath' of said lever, whereby the valve mechanismis actuated mechanically at the limit "of both the forward and back movement of'th plate, substantially as described; I I

FELIX A. VENNEY.=,:

Witnesses 1 1 JNo. G. ELLIoTT,

CLARENCE C; MARDER.-

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