US725714A - Bed-movement for printing-presses. - Google Patents

Description

N0. 725,7i4. 1 PATENTED APR. 21, 1908. N

' W. S. HUSON.

BED MOVEMENT FOR PRINTING PRESSES.

APPLICATION rum) my 12, 1902.

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25,7 4 v 'PATENTED APR. 21, 1903.

W. s. HUSON.

BED MOVEMENT FOR PRINTING PRESSES.

APPLICATION FILED MAY 12, 1902 no MODEL. v a sums-sum 2.

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No. 725,714. PATENTED A'PR. 21,1903.

w. s. HUSON. BED MOVEMENT FOR PRINTING PRESSBS.

APPLICATION FILED MAY 12. 1902. I0 IODBL. I 3 SHEETS-4113B! 3.

Urrnn STATES WINFIELD HUSON, OF DERBY, CONNECTICUT, ASSIGNOR TO THE W'HITLOCK PRINTING PRESS MFG. C O., OF DERBY, CONNECTICUT,

A CORPORATION.

BED-MOVEMENT FOR PRINTING-PR ESSES.

SPECIFICATION forming part of Letters Patent 725i,714, dated April 21 1903. 2

Application filed May 12, 1902. Serial No.106.993. (N0 model.) i

To all whom it may concern.-

Be it known that I, WINFIELD S. HUsON, of Derby, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Bed-Movements for Printing-Presses; and I do hereby declare the following, when taken in connection with the accompanying drawings and the figures of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in

Figure 1, a plan view of one form which my improved bed-movement for printingpresses may assume; Fig. 2, an enlarged broken View designedin particular to show the converter-sector and its immediately-related parts; Fig. 3, a'view-of the machine,

partly in side elevation and partly in vertical 1 section; Fig. 4, a broken detail view'on the line ct b of Fig. 3 and showing the auxiliary train for assisting the sun-andv-planet-gear' reversing; Fig. 7, a detail broken view of one period of printing and for differentiating the' speed of the bed at the ends of its stroke as required for the reversal of its motion.

With these ends in'view my invention consists in a bed-movement for printing-presses having certain details of construction and combinations of parts, as will be hereinafter described, and pointed out in the claims.

In carrying out my invention as herein shown theimpression cylinder 2 is driven at a uniform speed from the main driving-shaft 3 of the press by means of a train of gears comprising a main driving-pinion 4, mounted on the said shaft, an intermediate gear 5, into whichthe said pinion meshes, and a gear 6, mounted upon'the shaft 2 ofthe said cylinder 2'and meshed into by the said intermediate gear 5. The reciprocating type-.loed 7 is also driven from the main driving-shaft 3, the m'ain'driving-pinion 4 aforesaid meshing into the said intermediate gear 5, which meshes into a gear-wheel 8, mounted upon a driven shaft'9, carrying at its inner end a bevel-pinion 10, which meshes into a heavy :bevel-ge'ar 11, mounted vertically in a bushing 12, carried by the central girder 13 of the press. In' Order to reinforce the said central girder 13, I employ a cross-girder 14, extending under it at a right-angle and supported at its ends in the side frames 15 of the press. The girderl4 also carries a bracket 16, supporting the inner end of the said shaft 9.

Upon the bevel-gear 11 and eccentric to the centerthereof I mount a planet-gear 17, which meshes into an internally-toothed fixed ring 18 of twice its diameter, constituting the sun-gear of a sun-and-planet-gear train, and bolted to a suitable skeleton frame 19,

forming a part of the frame of the press.

verter-sector 22 in the form of a bellcrank lever, one arm of which is provided with a segmental rack 23, meshing into a straight rack 24, mounted in the adjacent end of the carriage or truck 25, the opposite end of into a fixed rack 27, located below it and supported in the frame of the press. The traversing or railway gear 26 also meshes into a rack 28, secured to the lower face of the reciprocating type bed 7, which therefore part-akes of the motion of the said carriage. As the planet gear 17 is just half the diameter of the sun-gear 18, the crank -pin will move back and forth in a straight line and would,

except as hereinafter provided for, move the carriage back and forth in a straight line at a rate of speed corresponding to the speed of the crank-pin, which varies in speed in different portions of its stroke after the manner of all crank-motions. In order, however, to modify this motion, which would otherwise be transmitted to the type-bed, andto secure therefor throughout the major portion of its stroke a rate of motion exactly conforming to the speed of the surface of the cylinder 2 during the period of printing, I locate upon the other arm of the converter-sector 22 an antifriction roller 29, which travels inv a doubly-curved cam-like path or cam 30,formed to receive it in a converter 31 in the form'of a plate, which is bolted to the-trough members 32 of the press-frame, the said trough members being formed with the usual troughs receiving antifriction-rollers 34, upon which the reciprocating type-bed 7 rests.

The said antifriction-roller 29 moves back and forth in the said path 30 and causes the sector 22 to oscillate upon the crank-pin 21 as upon acenter and impart what I may term a secondary or differential movement to the carriage 25, which on this account will have its movement modified and transformed from a pure crank-movement into a movement of equalized speed during the major portion of its stroke and of differential speed at the ends of its stroke. It follows from the foregoing that the curvature of the path 30 will determine the degree of oscillation of the converter-sector, and therefore the differential movement of the type-bed. Therefore in designing the press the speed of themajor portion of the movement of the type-bed will be made to correspond to the speed of the cylinder, and the stopping and starting or reversing speed of the type-bed at the ends of its stroke will be determined with refer- I once to the rate at which the type-bed is to be reversed, due. The curve of the path 30 will be laid out accordingly.

To illustrate the movement of the cylinder 2 and the type-bed 7, I have introduced a pression-cylinder moves, to slow it down from the point a, to the point a Where it comes to a stop, to start it up and move it from the point a? to the point a, to slow it down from the point a to the point a Where it comes to a stop, and to start it up and move it from the point a to the point a. It will thus be seen that the movement of the type-bed may be divided into three phases--viz., a central or major or printing movement and two end movements, which are utilized in bringing the bed to a stop and reversing it at each end of its stroke. It will be understood that the movement of the bed between the points a and a, and a and a in either direction will never be faster than the movement of the bed between the points a, and a in either direction. By difierentiating the movement of the bed as described in difierent portions of its stroke, so as to give it, as it were, a long rapid uniform printing stroke and short reversing strokes, I am enabledto operate the bed at a higher speed than I otherwise could.- The end. strokes of the bed are, in eflect, crankmotion strokes, while the central portion of the stroke of the bed is a crank-motion stroke modified or transformed into a stroke of uniform speed throughout its entire length.

As herein shown, I have provided the press with auxiliary mechanism for assisting'the sun-and-planet-gear train in driving the typebed during the operation of printing. This auxiliary mechanism is not essential to my improved press, though I prefer to employ it, nor is such auxiliary mechanism limited to use with the sun-and-planet-gear train above described, as it may be used in other situations.' It comprises a supplemental rack 35, fixed to the lower face of the type-bed 7 in position to be engaged by a vertically-movable gear-wheel 36, mounted in a bell-oranklike fork 37, having the ends of the two members of its short arm swiveled upon a bracket 38, through which the main driving-shaft 3 passes, so that the said fork 37 will swing on a center concentric with the said shaft. The long arm of the fork 37 extends downwardly and carries an antifriction roller 39, coacting with a cam 40, mounted upon a cam -shaft 41, which is driven from the main driving-shaft 3, so as to revolve the cam once for every complete movement back and forth of the type-bed by means of a pinion 42, mounted on the said main drivingshaft 3 and meshing into a large intermediate gear 43, carrying a pinion 44, which in turn meshes into a gear 45, mounted directly on the cam-shaft 41. The said cam 40 is shaped so that it lifts the gear 36 into engagement with the rackv35 at the beginning of the printing movement of the type-bed and maintains it in such engagement until such movement is completed, when the cam allows the gear to drop away from the rack 35 and remain in retirement until the bed starts upon its succeeding printing movement. It will be therefore understood that the power transmitted to the IIO cylinder 2, to bring the bed and cylinder into exact registration at the beginning of the printing operation. These are well-known adjuncts of printingpresses and do not need detailed description.

Instead of connecting the convertersector 22 with the truck or carriage by means-of the racks 23 and 24 I may, employ the modified construction shown in Fig. 7, in which the bell-crank converter-sector 47 is connected with a carriage or truck by means of a pitman 49, the pivotal connection of which with the con verter-sector 47 permits the crankpin 50 to be connected with the planet-gear at some other point than on the pitch-line thereof, in,which case the pinwill travel through a slightly-curved path instead of in a straight line. That movement of the pin,

however, will be compensated for by the pivotal connection between the lever 47 and the pitman 49 and could not be compensated for a shaft57, corresponding to the cam-shaft 41,

before mentioned. It will be understood-that the cam 56 is constructed and arranged so as to cut the wheel into operation at the beginning of the printing movement of the bed and to cut it out of operation at the conclusion of the printing movement of the bed.

In the modified construction shown by Fig. 9 the supplemental rack 35 is constantly meshed into by a gear-wheel 58, turning idly upon a shaft 59 and meshed into by a pinion 60, turning idly upon the main shaft 3 and provided with'a clutch-head 61, which is engaged by a corresponding clutch-head 62, rotating with but splined upon the said main shaft 3 and cut into and out of action with the clutch-head 61 by means of a lever 63, driven from a cam, (not shown,) butcorresponding to the cam 56, before mentioned. It will be understood that at the beginning of the printing movement of the bed 7 the lever 63 moves the clutch-head 62 into engagement with the clutch-head 61, whereby the power of the gear 58, in mesh with the rack 35. At the conclusion of the printing movement of the bed the lever 63 again acts and this time to disconnect the head 62 from the head 61, whereby the power of the shaft 3 is cut off from the pinion and the gear 58, which are thereafter moved idly by the rack of the typebed.

In view of the modifications shown and described and suggested and of others that may obviously be made I won id have it understood that I do not limit myself to the constructions shown and described, but hold myself at liberty to make such departures therefrom as fairly fall within the spirit and scope of my invention.

Having fully described my invention,what I claim as new, and desire to secure by Letters Patent, is

1. In a bed-movement for printing-presses, the combination with a bed, of a crank-pin moving in a reciprocating path, an oscillating converting device applied directly to the said crank-pin with which it reciprocates and on which it is oscillated, and connection between the said converting device and the type-bed, whereby the said device by its oscillation on the said pin modifies the action thereof so as to move the bed in the central portion of its throw at a rate uniform with the movement of the impression-cylinder and at a different rate at the ends of its throw.

2. In a bed-movement for printing-presses, the combination with a bed, of power connections for reciprocating the said bed including a crank-pin, a converting device applied di-' rectly to the said pin with which it reciprocates, and on which it is oscillated, connection between the said converting device and the said bed, and a converter containing adoubly-curved path whicheffects the oscillation of the said device upon the crank-pin,

whereby the movement of the pin is modified.

so that the bed will be moved in the central portion of its throw at a rate uniform with the movement of the impression-cylinder, and at a different rate at the ends of its throw.

3. In a'bed-movement forprinting-presses, the'combination with abed, of power connections for reciprocating the said bed including a crank-pin, a converter-sector oscillating upon the said pin and having rack connection with the bed, and a converter which 0scillates the converter-sector to modify the motion derived by the bed from the crankpiu so that the bed is moved'in the central portion of its throw at a rate uniform with the movement of an impression-cylinder, and at a different rate at the ends of its throw.

4. In a bed-movement for printing-presses, the combination with a bed, of a'carriage connected with the bed and provided with a rack, and power connections for reciprocating the said bed including a crank-pin, an oscillating converter-sector mounted upon the said pin and provided with a segmental rack meshing into the rack of the carriage, and a IIC to modify the motion derived by the bed from the said pin. V

6. In a bed-movement for printing-presses, the combination with a bed, of power connections for reciprocating the said bed to move the same in the central portion of its throw at a rate uniform with the movement of an impression-cylinderand at a differentiated rate at the ends of its throw, and a supplemental bed-driving mechanism including a rack carried by the bed, agear arranged independently of the impression-cylinder for coaction with the said rack, and means for cutting the said gear into operation at the beginning of the printing movement of the bed vand cutting it out of operationat the conclusion of the printing movement of the bed.

7. In a bed-movement for printing-presses, the combinationwith abed, of power connections for moving the said bed in the central portion of its throw at a rate uniform with the movement of an impression-cylinder, and at a different rate at the ends of its throw, asupplemental bed-driving mechanism operating to assist the movement of the bed during the central portion of its throw V and including a rack applied to the lower face of the bed, and power connections lead ing to the said rack from ghe driving-shaft of the machine. p Q

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

WINFIELD S. HUSON.

\Vitnesses: v

GEORGE D. SEYMO R, FREDERIC O. EARLE.

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