US628220A - Mechanical movement. - Google Patents

Description

Nb. 628,220. Patented July4, |899.

n. L. cnossMAN.

MECHANICAL MVEMENT.

(Application Bled Hay 2, 1898.)

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n. L. cnossMAN. MECHANICAL HOVEMENT.-

` (Application med luy 2, 1898.)

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UNITED STATESv PATENT OFFICE.

ROBERT L. CROSSMAN, OF TAUNTON, MASSACHUSETTS, ASSIGNOR OF ONE- THIRD TO THE HUBER PRINTING PRESS COMPANY, OF SAME PLACE.

MECHANICAL MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 628,220, dated July 4, 1899.

Application filed May 2, 1898. Serial No. 679,411. (No model.)

T0 all whom t may concern:

' Be it known that I, ROBERT L. CEossMAN, of Taunton, county of Bristol, State of Massachusetts, have invented an Improvement in Mechanical Movements, of which the following description, in connection with the accompanying drawings, is a specification, like letters and numerals on the drawings representing like parts.

This invention relates to a mechanical movement whereby a rotary movement is transformed into a rectilinear or reciprocating movement, and is particularly adapted for use in imparting a reciprocating movement to the beds of printing-presses. When used in such connection, my invention has ,for its object the conversion of the rotary movement of a driving member into rectilinear or reciprocating movement of the part to be reciprocated-such, for instance, as the type-bed-so that the bed shall be moved uniformly throughout the greater part of its travel, and as the limit of its traverse in .either direction is approached to gradually parallel rack-bars attached to or movablev with the bed, though it is to be understood that this is only one application of myinvention and that my invention is not restricted to such application nor to its application in a printing-press provided with the mechanism herein shown for effecting the greater portion of the stroke of the bed.

The double-rack and cooperating gear mechanism herein shown is of that type wherein the racks are arranged one above the other, but not in the same vertical plane, the driving-gear being located between the racks and being brought into engagement alternately therewith by a relative lateral movement of said racks and gear, the shiftingbeing effected by 'any suitable means not in itself forming any part of my invention.

Figure l is a vertical longitudinal sectional View of the part to. be reciprocated on the line cc Fig. 6, with one embodiment of my invention applied thereto. Fig. 2 is a plan View thereof below the line 0c' Qc', Fig, l. Fig. 3 55 is aview similar to Fig. l, the reciprocating member, however, being shown at the eX- treme limit of its traverse in one direction. Fig. 4 is alike view, partially broken out to save space, showing the position of the va- 6o rious parts after the reciprocating member has been started on its return stroke or movement. Fig. 5 is a similar view showing the position of the parts when the reciprocating member has approachedthe end of its uni- '65 form speed on such return-stroke; and Fig. 6

is a transverse sectional view of the mechanism shown in Fig. 1,011 the line @c2 :t2 thereof, looking to the right.

The supporting-frame A is provided with 7o suitable guideways A', upon which the typebed or reciprocating member B is mounted and slides, and I have herein shown hangers b depending from the bed to support the lower rack-bar R', the upper and parallel rack-bar 75 R being secured. to the under side of the bed in suitable manner, said rack-bars lbeing 1ocated in different vertical planes, as clearly shown in Fig. (i.

A transverse main driving-shaft D, sup- 8o ported in bearings A on the frame, is provided with a broad pinion CZ in mesh With an actuating member, shown as a gear dx, fast on a longitudinally-movable shaft D', supported in the frame, said shaft having an annularly-grooved collar d thereon, engaged by a pin on a rocker-arm d2, said arm being rocked at the proper time byacam cl3 on ashaft D2, which shaft is rotated by means of suitable gears S, 9, l0, and l2 from the driving-shaft. 9o By means of the mechanism described the bed B is, by the engagement of the actuating member or gear dx with one of the racks, driven at a uniform speed in one direction until the end of the engaged rack isdirectly above 9 5 the vertical diameter of the gear dx, as inFig.

l, and at such time the cam d3 operates by the intervening connections to shift the gear CZX from engagement with such rack, and While the gear makes a half-revolution itis brought 10o into position 'to engage the other rack, and thereby drive the bed in the reverse direction'until the end of the latter rack reaches the point of disengagement with the actuating-gear. Thus the part to be reciprocated will be driven at a uniform speed throughout the greater portion of its stroke. After a rack and the actuating-gear are disengaged the movement of the bed is to be continued with a graduallyretarded speed until the bed is brought to a standstill, and then the bed is started and moved with a graduallyaccelerated speed upon its return movement, all while the actuating-gear is moving from engagement with one rack into engagement with the other.

On the inner face of the gear (ZX are located three laterally-extended crank pins or studs 2, 3, and 4, which may be provided with rolls, if desired, the pins 2 and 3 being shown as equidistant from the center of rotation of the gear and near the periphery of the latter, while the pin -l is nearer the center of the gear and equidistant from the pins 2and 3.

Each hanger b is provided on itsinner face with outwardly-diverging guideways formed by short inclined shoes b b2, near the top and bottom of the hanger, and a long double shoe bx, the inclined faces b3 b4 thereof being parallel to the outer faces of the short shoes, which latter are at such an angle that they willbe radial to the axis of the gear ZX when the shift of the latter from one to the other rack-bar is effected. The pins 2 and 3 are long enough to enter the guideways at the proper times irrespective of the position of the actuating-gear relatively to either rack.

I have herein shown a curved shoe b5 located on and at the apex of the double shoe bx, the convex face of the shoe being outwardly 'turned and having the same curvature as the path of the crank-pin 4, which latter is herein shown as shorter than the crank- pins 2 and 3 in order to clear the double shoe bX.

Referring to Fig. l, the reciprocating member B and actuating-gear (ZX are moving in the direction ofarrows 20 and 25, respectively, and the said gear has reached the point of disengagement with the rack R, while the crankpin 3 has just moved into the upper guideway into engagement with the shoe b'. As the crank-pin 3 continues to move the Inovement of the bed B in the direction of the arrow 2O will be maintained by or through the pin and at substantially uniform speed until said crank-pin passes over dead-center. From such point the speed of the member B will be gradually decreased, the long face b3 of the shoe bX preventing overrun ning, and just as the pin 3 moves out of the guideway and is disengaged from the shoe b' the pin 4 engages the curved shoe b5, the movement of the reciprocating member or bed B being finally stopped when the crank-pin 4 reaches the center of said shoe b5, as shown in Fig. 3. At such time the pins 2 and 3 are in engagement with the faces b3 b4, respectively, of the shoe bx, equidistant from its ends, and from this point the crank- pins 2 and 3 effect the movement of the bed B to the right, Fig. 3, with a gradually-accelerated speed, the grad- 'ual advance of the pin 4 to the right while moving over the lower half of the shoe b5 permitting the movement of the bed, while at the same time keeping the shoe bxin engagement with the crank- pins 2 and 3 until the parts assume the position shown in Fig. 4. Vhen the pin 3 has passed the apex of the double shoe, it ceases to inuence the move ment of the bed B, which movement is then continued by the pin 2, the inner pin 4 then passing from the shoe b5 and across the vertical side of the shoe bx. By this time the crank-pin 2 has entered between the shoes b2 and bx, the former preventing overrunning of the mechanism, and said pin retains control of the bed until it passes beyond the shoe bXjust as the gear (ZX comes into engagement with the rack R and completes the major part of the stroke to the right. The crankpins and cooperating shoes thus constitute reversing means for the reciprocatory member, and the latter is under the complete control of said means from the instant of disengagement of the actuating-gear and one rack to theinstant of itsengagement with the other rack.

In Fig. 5 the bed has nearly completed its stroke to the right at uniform speed and the crank-pin 3 is about to engage the smallshoe b2 to assume control of the bed after disengagement of the gear (ZX and Arack R' and continue the stroke while gradually decreasing the speed, the pin 4 meanwhile coming into engagement with the shoe b5 at its lower corner and passing thence to the center of its curved face, when the movement of the bedy is stopped. Meanwhile the crank-pin 2 will have moved into engagement with the face b3 of the shoe b ready to start the movementin the opposite direction, acting vin conjunction with the pin 3 on the face b, while the pin 4 will complete its travel over the upper half of the curved shoe b5 and pass therefrom.

The shoes b and b2 are made short in order to permit the entrance and exit of the outer crank-pins 2and 3 from the guideways formed by said shoes and the shoe bx, and,if desired, the inner ends of the short shoes may be beveled or rounded, as shown, to facilitate the entrance and exit of the crank-pins.

My invention is not restricted to the precise construction and arrangement herein shown, for the same may be varied or modied without departing from the spiritand scope of my invention.

Having thus fully described my invention in a practical embodiment thereof, what I claim, and desire to secure by Letters Patent,

l. The combination with the part to be reciprocated and means for reciprocating the same throughout the greater portion of its IOO IIO

movement, of reversing mechanism comprising two rotatable crank-pins, and two oppositely-inclined guideways movable with the reciprocating part, one of said crank-pins cooperating with one of the guideways to institute, and the other crank-pin coperating with the other guideway to terminate, the reversing, and meansto control the part to be reciprocated during the intermediate period of reversing, substantially as described.

2. The combination with the part to be reciprocated and means for reciprocating the same throughout the greater portion of its movement, of reversing mechanism comprising two rotatable crank-pins, and two oppositely-inclined shoes movable with the reciprocating part, said crank-pins each engaging one of said shoes, successively, to respectively institute and terminate the reversing, and means to control the part to be reciprocated during the intermediate period of reversing, substantially las described.

3. The combination with the part to be reciprocated and means for reciprocating the same throughout the greater portion of its movement, of two rotatable crank-pins, and means in connection with said reciprocating part, for engagement by said pins, whereby the speed of said part is gradually decreased, the part stopped, and thereafter started in the opposite direction with a gradually-accelerated speed, substantially as described.

4. The combination with the part to be reciprocated and means for reciprocating the same throughout the greater portion of its movement, of two rotatable crank-pins, and means at each end of the said part to be reciprocated, for engagement by both of said pins, and separate means to control the reciprocating part at the period of reversal of its direction of movement, whereby the speed of said part is gradually decreased, the part stopped, and thereafter started in the opposite direction with a gradually-accelerated speed, substantially as described.

5. The combination with the part to be reciprocated and means for reciprocating the same throughout the greater portion of its movement,of two rotatable crank-pins, means in connection with said reciprocating part, for engagement by said pins, whereby the speed of said part is gradually decreased, the part stopped, and thereafter started inthe opposite direction with a gradually-accelerated speed, and separate means to control said reciprocating part atthe period of reversal of its direction of movement, substantially as described.

6. The combination with the part to be reciprocated and means for reciprocating the same throughout the greater portion of its movement, of three rotatable crank-pins fixed relatively, and means in connection with said reciprocatingl part, for engagement by said pins, whereby the speed of said part is gradually decreased, the part stopped, and thereafter started in the opposite direction with a gradually-accelerated speed, substantially as described.

7. The combination with the part to be reciprocated and means for reciprocating the same throughout the greater portion of its movement, of two controlling members movable in a Xed circular path, and two oppositely-inclined guideways movable with said part to be reciprocated, to be engaged by-both of said controlling members at each period of reversal, whereby the direction of movement of the part to be reciprocated is reversed while governed by said controlling members, substantially as described.

8. The part to be reciprocated, and means for effecting the reciprocation of said part throughout the greater portion of its movement, combined with three rotatable relatively-iXed crank members, two inclined guideways movable with the reciprocating part and with which two of the crank members cooperate to respectively institute and terminate the reversal of said part, and means in connection with said part, to cooperate with the third crank member and control the reciprocatory part during the middle period of reversing, substantially as described.

9. The part to be reciprocated, rack-andpinion mechanism for effecting the reciprocation thereof throughout the greater portion of its movement,two crank members rotatable .coincidentally with the gear, and inclinedy shoes in connection with said reciprocatory part, for engagement by said crank members, to gradually decrease the speed of said reciprocatory part and gradually increase its speed in the opposite direction, respectively, said crank-pin serving to prevent overrunning of said reciprocatory part, substantially as described.

10. The part to be reciprocated, rack-andpinion mechanism for effecting the reciprocation thereof throughout the greater portion of its movement, two crank-pins on said gear and equidistant from its axis of rotation, a third pin thereon nearer its axis, and means at each end of said part to be reciprocated, to be engaged by said pins, whereby the gradual reduction in speed, of said part, stoppage, and starting thereof in the opposite direction is effected, substantially as described.

11. The part to be reciprocated, means forreciprocating it throughout the greater portion of .its movement, two rotatable crankpins having a single path of movement, two projections or shoes carried by said part to be reciprocated and oppositely inclined to the line of travel thereof, and adapted to be cooperatively engaged by said crank-pins, to institute and terminate the reversing, an intermediate shoe carried by the reciprocatory part, and a separate coperating crank-pin, substantially as described.

12.- The part to be reciprocated, means for reciprocating it throughout the greater portion of its movement, two rotatable crankpins having a single path of movement, two

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projections or shoes at cach end of said part l to cooperate only with the curved shoe, sul) to be reciprocated and oppositely inclined to the line of travel thereof, and adapted to be cooperatively engaged by said crank-pins, to institute and terminate the reversing, an intermediate shoe carried by the reciprocatory part, and a separate cooperating cranlvpin, substantially as described.

13; The part to be reciprocated, meansV to reciprocate it throughout the greater portion of its movement, two rotatable crank-pins movable in a single path, oppositely-inelined guideways carried by the part to be reciprocated, each guideway formed by a long and a short shoe in parallelism, an intermediate curved shoe, and a third rotatable crank-pin to cooperate therewith, substantially as described.

14. The part to be reciprocated, means to reciprocate it throughout the greater portion of its movement, two rotatable crank-pins movable in a single path, o1 positelyinclined guideways at each end of the part to be rcciprocated, each guideway formed by a long and a short shoe in parallelism, an intermediate curved shoe, and a third rotatable crankpin to coperate therewith, substantially as described.

15. The part to be reciprocated, means to reciprocate it throughout the greater portion of its movement, two rotatable crank-pins movable in a single path, oppositely-inclined guideways carried by the part to be reciprocated, each guideway formed by a long and a short shoe in parallelism, an intermediate curved shoe at the apex of the two long shoes and higher than the latter, and a. third rotatable crank-pin shorter than the other two,

stantially as described.

16. The combination with the part to be reciprocated and means for reciprocating said part throughout the greater portion of its movement, of a plurality of rotatable crank members, inclined shoes in connection with said part to be reciprocated, to be engaged by all of said crank members at each reversal, and means to retain the latter in engagement with the shoes during the control of the reciprocatory part by the crank members, substantially as described.

17. A part to be reciprocated and means to reciprocate it throughout the greater portion ofits movement, said means comprisingracks and a rotatable gear, relative lateral movement of said racks and gear effecting disengagement of one of said racks and the gear and bringing the latter into engagement with the other rack, combined with reversing means for the part to be reciprocated, said reversing means comprising a plurality ot crank-pins on said gear, oppositely-inclined guideways carried by the part to be reciprocated, one of said crank-pins instituting and the other terminating the reversal by respective engagement with said guideways, and means to control the reciprocatory part during the middle period, substantially as described.

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

ROBERT L. CROSSMAN.

Vitnesses:

BERTHOLD HUBER, W. K. HODGMAN.

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