US1170176A - Mechanical movement. - Google Patents

Description

Patented Feb.1, 1916.

3 SHEETS-SHEET 1- INVENTOR WITNESSES THE COLUMBIA PLANOGRAPH 110.. WASHINGTONv 0'. c4

R. MIEHLE.

Patented Feb. 1, 1916.

3 SHEETS-SHEET 2.-

A TTORIVEYS THE COLUMBIA PLANOGRAPH :0 WASHINGTON, D. c.

R. M|EHLE. MECHANICAL MOVEMENT.

APPLICATION FILED OCT. 20,1911.

Patented Feb. 1, 1916.

3 SHEETS-SHEET 3- :5 WITNE SSES THE COLUMBIA Pun omzlmu C0,, WASHINGTON, D- 2. v

D STATES PATENT OFFICE.

ROBERT MIEHLE, OF CHICAGO, ILLINOIS, ASSIGNOR TO CONTINENTAL & COMMERCIAL TRUST & SAVINGS BANK, TRUSTEE, OF CHICAGO, ILLINOIS.

MECHANICAL MOVEMENT.-

Specification of Letters Patent.

Patented Feb. 1, 1916.

Application filed October 20, 1911. Serial No. 655,820.

To all whom it may concern:

Be it known that 1, ROBERT MIEHLE, a citizen of the United States, residing at (.hicago, in the county of Cook, State of Illinois, have invented certain new and useful Improvements in Mechanical Movements, of which the following is a description, reference being had to the accompanying drawing and to the letters and figures of reference marked thereon.

This invention relates to improvements in mechanical movements for transforming rotary into reciprocatory motion, and more particularly to the mechanism for reciproeating the bed of printing presses'or similar reciprocating parts, and is an improvement on the mechanical movements for which Letters Patent of the United States No. 520,828, were issued to Robert Miehle on the 5th day of June, in the year 189%. In said Letters Patent No. 520,828, a. driving gear engages alternately with an upper and a lower rack, which are secured to a rack frame, which is suspended from the press bed which carries the printing form, said gear driving the press bed the greater portion of its movement.

The object of this invention is to provide a strong and durable mechanism, which will operate in conjunction with two racks secured to the press bed and consists of two opposite turning gears meshing with each other, both gears being mounted on the same rocker frame in such a manner that when one gear is lowered from engagement with its rack, the other gear is raised to engage with the other rack. This arrangement of the rocker frame and gears makes a simple and powerful mechanism, which is well adapted to drive printing press beds.

The invention also consists in a novel and compact arrangement of the driving gears for the bed motion shaft, which consists of an internal toothed driving gear, which imparts motion to the bed motion shaft driving gear in a manner to offset the difference of motion the crank connecting or pitman rod would ordinarily impart to the press bed at each reversal of thepress bed as hereinafter described.

The invention further consists of a novel arrangement of-the positioning of the cam shaft driving gears so that the shifting of the bed motion shaft, which carries the cam shaft driving pinion will be allowed .to float or shift while the cam shaft gearing remains stationary.

In the above mentioned patent, a horizontal bar and connecting rod act at the end of each stroke to gradually slow down, stop, and start the said press bed on its return movement, while the rack gear is shifted out of and into engagement with the racks. The said horizontal bar is provided at each end with cam slots for raising and lowering said bar into and out of engagement with the press bed at the end of each stroke thereof. The horizontal bar is reciprocated with every turn of the crank and when the rack gear is in mesh with the racks, the sudden action of the cam slots in the bar has a tendency to unbalance the turning motion of the rack gear while giving motion to the press bed on the printing stroke, which interferes with the travel and register'of the printing form with the printing or impression cylinder. Another serious and detrimental effect which the action of the cam slots has on the bar, is that a forward and backward movement ofthe bar takes place when the bar is raised or lowered by the cam slots. This is brought about by the swinging of the connecting rod when the bar is raised or lowered as wellas by the tilting motion that the bar receives when one end lowers and the other endraises. This forward and backward action interferes with the teeth of the bar engaging or'disengag- 'ing properly with the rack teeth on the press bed, as well as interfering with the rack gear teeth engaging and disengaging with the bed racks.

Therefore, the object of my improved form of construction is to provide means, operated from the cam shaft, which will raise and lower the bar only when it is necessary for it to engage or disengage with the press bed, with the pivot of the bar operating in such a manner, that proper engagement of the bar with the press bed, is

' showing the position of the parts at the end of th'e'non-printing stroke; Fig. IV is a similar view showing the position of the parts at the beginning of the non-printing stroke; Fig. V is a side elevation of the reciprocating bar slider frame partly in section; Fig. VI is a sectional view on the line 00w of Fig. V; Fig. VII is a side elevation of the cam shaft driving gears.

In carrying out my invention, 1 have provided a supporting framework 1, which as herein illustrated, is the framework of a printing press and on this framework revciprocates the ordinary type bed 2. Secured to the under side of the type bed, are two parallel racks 3 and 4, which have their toothed sides arranged so as to face downwardly. The main shaft 5 is supported by the press 1, and on this main shaft is adriving pinion 6.

The drive pinion 6 meshes with the external surface teeth of the intermediate gear 37, which is secured to the shaft 38, supported and journaled in the frame 38, which is supported by the press frame 1. The intermediate gear 37 has a broad driving face and meshes with the impression or printing cylinder gear 11 mounted on the cylinder shaft 12, thus imparting motion to the cylinder 13. The intermediate gear 37 is also an internal gear, its internal gear teeth 39 meshing with the gear 7, which is secured to the outer end of the bed motion shaft On the inner end of the bed motion shaft 8, and directly below the rack 3, is secured the driving gear 14 (of the same size as gear 7 which is adapted toengage with said rack 3 to drive the type-bed 2 to the left on the printing stroke. Thedriving gear 14 imparts motion to the drive pinion 17 (with which it is continuously in mesh) which has a broad driving face and is adapted to engage with the rack 4 to drive the type-bed to the right on the non-printing stroke. Said drive pinion 17 is loosely mounted on a stud 18 secured in the arm 19 of the bed motion rocker frame 20. Said bed motion rocker frame 20 consists of the bearing (in which is journaled the bed motion shaft 8); an arm 19. which has a stud 18 upon which is loosely mounted the drive pinion 17 (as above described) and another arm 21 which has a stud and friction roller rk n i e an stee s 2 e as 15 mounted on the cam shaft 16. The bed motion rocker frame 20 also has fulcrum extensions 44 and 45 journaled in the framework of the press. The various parts of the bed motion rocker frame just enumerated are cast ina single piece.

The working of the roller 22 in the cam groove 23 of the cam 15 causes the bed motion rocker frame 20 to raise and lower the driving gear 14 and the drive pinion 17 into and out of mesh with racks 3 and 4 respectively. The arrangement of the fulcrum center is such that the driving gear 14 is raised at the same time that the drive pinion 17 is lowered, and vice versa.

The means for retarding, stopping and reversing the movement of the typebed coniprises a horizontal bar 24 carrying at either end blocks 25 and 26, which slides to and fro in the slides 27 and 36 respectively on the frame 27, said horizontal bar 24 being further held in position by the cap 28 on the frame 27. Said block 26 extends laterally, its upper surface being provided with gear teeth adapted to engage with the gear teeth on the blocks 29 and 30 which are secured at either end to the under side of the type bed. The slide 27, in which the block 25 operates, is supported by the upright 10 being pivoted thereto at 38 The frame 27 has an arm 31 extending downward, said arm 31 carrying a stud and friction roller 32 operating in the cam groove of the cam 40 mounted on the cam shaft 16. The working of the roller 32 in the cam groove raises and lowers the slide 36 and consequently that end of the horizontal. bar 24 which carries the block 26, the latter meshing with said blocks 29 and 30, alternately. The lug 47 on the standard 10 serves as a guide for the arm 31. The cam groove 33 is formed with two operating faces, one of which is adapted to engage and disengage the stopping and starting means at one end of the stroke of the bed, and the other of which is adapted to engage and disengage the stopping and starting means at the other end of the stroke of the bed. Attached to said block 25 and extending laterally is a pin 41 upon which is loosely mounted one end of the connecting rod or pitman 34. the other end of which is looselv mounted about the crank stud 35 which is fixedly secured to the driving gear 14. Two sliding blocks 41, are also mounted on the pin 41 and having bearing in the slide 27. Said blocks 41 are held together by the cross bar 36 in order that they may rock together when the slide bar 27"is swung on its fulcrum 38.

Motion is imparted to the cams 15 and 40 as follows: The small pinion 42 (mounted on the bed motion shaft 8) meshes with an intermediate gear 46 which is journaled on the bracket 46 and meshes with the gear 43 stroke and is controlled by the horizontal bar 24 because of the block 26 meshing with the block 30), as the driving gear 14 continues to rotate, it causes the horizontal bar 24 to slide to the right (by means of the connecting rod or pitman 34), said bar carrying with it the type-bed 2 at the end of the non-printing stroke. At the same time, the working of the roller 22 in the cam groove 23 raises the drive pinion 17, until it meshes with the rack 4 (as shown in Fig. IV), said pinion 17 then driving the typebed to'the right. As explained above, the driving gear 14 is lowered when the drive pinion 17 is so raised. At the same time that the drive pinion 17 engages the rack 4, the working of the roller 32 in the cam grooves 33 lowers the slide 36 which lowers the end of the horizontal bar 24, which car.- ries the block 26, thereby disengaging the latter from the block 30. Near the end of the non-printing stroke, the working of the roller 32 in the cam groove 33 raises the slide 36 and consequently the block 26 until the latter meshes with the block 29 (secured to the under side of'the type-bed as described above) as shown in Fig. III. At the same time the block 26 is so raised, the working of the roller 22 in the cam groove 23 lowers the drive pinion 17, disengaging it from rack 4. The movement of the type-bed is now controlled by the horizontal bar 24 which brings it to a full stop and starts it in the reverse'direction on the printing stroke. Shortly after the type-bed has started on the printing stroke, the working of the roller 22 in the cam groove 23 raises the'driving gear 14, until it meshes with the rack 3, which then drives the type-bed on the printing stroke. At the same time that the driving gear 14 is so raised, the working of the roller 32 in the cam groove 33 lowers the slide 36, and consequently the end ofthe bar 24 which carries the block 26, disengaging the latter from the block 29. Near the end of the printing stroke, the working of the roller 32 in the cam groove 33 raises the slide 36 which carries up with it the end of the bar 24, which carries the block 26 until the latter meshes with the block 30. At the same time that the block 26 is so raised, the working of the roller 22 in the cam groove 23 causes the driving gear 14 to be lowered, disengaging it from the rack 3. The type-bed is now controlled by the horizontal bar 24 which retards its movement and brings it to a full stop at the end of the printing stroke, as shown in Fig; I.

The driving gear 14 is of such proportions that it makes one complete revolution when'engaged with the rack 3 to drive the press bed on the printing stroke; one complete revolution when drive pinion 17 is engaged with the rack 4, to drive the press bed on the non-printing stroke; and practicallv one half of a complete revolution at each end when the press bed is controlled by the horizontal bar 24, thus making three complete revolutions for each complete backward and forward stroke of the press bed. In the construction described above, it will be seen that the crank secured to the driving gear 14, through its connecting or pitman rod gives a slightly slower action in stopping and starting the press bed at the end of the non-printing stroke, and a slightly quicker action in stopping and starting the press bed at the end of the printing stroke. This action, however, is offset and equalized by the acceleration of said crank at the end of the non-printing stroke, caused by the rolling action of the gear 7 within the internal gear 39 as the bed motion rocker frame 20 is shifted, in order to bring the driving gear 14 into mesh with the rack 3; and by the retardation of said crank at the end of the printing stroke, caused by the rolling action'of the gear 7 withinthe internal gear 39,as the bed motion rocker frame 20 is shifted in order to bring the drive pinion 17 into mesh with the rack 4.

In practice it is advantageous to drive 7 the cam shaft by gearing direct from .thebed motion shaft instead of gearing it to the fiy-wheel drive pinion shaft, as a beneficial effect is produced on thebed motion crank when a drag is brought to bear on the bed motion shaft. I therefore, arrange the intermediate cam gear center in a position with its driving p1n1on so that'when the bed motion shaft and the pinion are rocked by the rocker frame the center of the pinion moves across the line g y, which cuts through the bed motion shaft center, the bed motion frame fulcrum, and the intermediate cam gear center. By this arrangement the mesh of the pinion teeth with the intermediate gear teeth is not materially disturbed when the cam shaft driving pinion is floated or shifted in relation with the cam shaft gearing, and a driving connection is obtained between the bed motion shaft and the cam shaft. 1

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

1. The combination with a reciprocating member or bed and means for reciprocating the same, of a reversing mechanism adapted to reverse the movements of said member or bed, including a reciprocating bar having means at one end thereof adapted to be periodically interlocked with said member or bed at each end thereof, and at each end of its stroke, a .frame on which said bar slides, means for swinging said frame to bring said bar into and out of engagement with the member or bed, and means for reciprocating the bar in said frame.

2. The combination with a reciprocating member or bed and means for reciprocating the same, a reversing mechanism adapted to reverse the movements of said member or bed, including a reciprocating bar having means at one end thereof adapted to be periodically interlocked with said member or bed at each end thereof, and at each end of its stroke, a frame on which said bar slides, means for pivotally supporting said frame at a point remote from the engaging end of the sliding bar, means for swinging said frame about its pivot, and means for reciprocating said bar.

8. The combination with a reciprocating member or bed, and means for reciprocating the same, of a reversing mechanism adapted to reverse the movements of said member or bed including a reciprocating bar having means at one end thereof adapted to periodi cally interlock with said member or bed at each end thereof, and at each end of its stroke, a frame on which said bar slides, means for pivotally supporting said frame at a point remote from the engaging end of the bar, said frame at a point adjacent said engaging end of the bar having an arm pro jecting therefrom, means engaging said arm for swinging said frame, and means for re ciprocating said bar on said frame.

4:. The combination with a reciprocating member or bed, and means for reciprocating the same, of a reversing mechanism adapted to reverse the movements of said member or bed, including a reciprocating bar having an engaging means at one end thereof, adapted to be periodically interlocked with said member or bed at each end thereof, a pivoted frame on which said bar slides, said frame having guide-ways formed therein adjacent its pivot, said bar having blocks sliding in said guide-ways connected to the opposite end thereof from the engaging means, means carried by said frame for guiding the engaging end of said reciprocat-- ing bar, means for swinging said frame, and means for reciprocating said bar.

5. The combination with a reciprocating member or bed, of racks secured to the under side of said bed, and having downwardly projecting teeth, a bed motion rocker frame, driving pinions carried thereby and adapted to alternately engage said racks, means for rotating said pinions in opposite directions, means for moving the pinions into engagement with the racks and disen a in the same therefrom, and a reversing mechanism adapted to reverse the movement of the member or bed 1ncluding a rec1procat1ng.

bar, having means at one end thereof, adapted to be periodically interlocked with said member or bed at each end thereof, and at each end of the stroke of the bed, means for reciprocating said bar, and means for mow ing the same into and out of engagement with said member or bed.

6. The combination with a reciprocating member or bed, of racks secured to the under side of said bed and having downwardly projecting teeth, a bed motion rocker frame, driving pinions carried thereby and adapted to alternately engage said racks, means for rotating said pinions in opposite directions, means for moving the pinions into engagement with the racks and disengaging the same therefrom, and a reversing mechanism adapted to reverse the movement of the member or bed including a reciprocating bar, having means at one end thereof adapted to be periodically interlocked with said member or bed at each endthereof, and at each end of its stroke, a frame on which said bar slides, means for swinging said frame to bring said bar into and out of engagement with the member or bed, and means for reciprocating the bar in said frame.

7. The combination with a reciprocating member or bed, of racks secured to the under side of said bed, and having downwardly projecting teeth, a bed motion rocker frame, driving pinions carried thereby, and ada Jted to alternately engage said racks, means for rotating said pinions in opposite directions, means for moving the pinions into engagement with the racks and disengaging the same therefrom, and a reversing mechanism adapted to reverse the movement of the member or bed, including a reciprocating bar having means at one end thereof adapted to be periodically interlocked with said member or bed at each end thereof, and at each end of its stroke, a frame on which said bar slides, means for pivotally support ing said frame at a point remote from the engaging end of the sliding bar, means for swinging said frame about its pivot, and means for reciprocating said bar.

8. The combination with a reciprocating member or bed, of racks secured to the under side of said bed and having downwardly projecting teeth, a bed motion rocker frame, diving pinions carried thereby and adapted to alternately engage said racks, means for rotating said pinions in opposite directions, means for moving the pinions into engagement with the racks, and disengaging the same therefrom, and a reversing mechanism adapted to reverse the move ment of the member or bed including, a reciprocating bar having means at one end thereof adapted to periodically interlock with said member or bed at each end thereof, and at each end of its stroke, a frame on which said bar slides, means for pir otally supporting said frame at a point remote from the engaging end of the bar,

said frame at a point adjacent said engaging end of the bar having an arm projecting therefrom, means engaging said arm for swinging said frame, and means for reciprocating said bar on said frame.

9. The combination with a reciprocating member or bed, of means for reciprocating said member or bed including racks carried by said bed, a shaft having a gear on its inner end, a fulcrumed bed motion rocker frame in which said shaft isjournaled, a second gear mounted on said rocker frame and meshing with said first gear, means for rocking said bed motion frame whereby said gears are alternately brought into engagement with the respective racks for reciprocating the bed and means for reversing the movements of the member or bed including a reciprocating bar having means at one end thereof adapted to periodically interlock with said member or bed at each end of the stroke of said member or bed, means for reciprocating said bar, and means for moving said bar at an angle to the direction of its reciprocation for causing the engaging means carried thereby to engage and disengage the member or bed.

10. The combination. with a reciprocating member or bed, of racks carried by said member or bed, means for reciprocating said member or bed including a shaft having a gear on its inner end, a fulcrumed bed motion rocker frame in which said shaft is journaled, a second gear mounted on said rocker frame and meshing with the said first gear, means for rocking said bed motion frame whereby said gears are alternately brought into engagement with the respectiveracks for reciprocating the bed, a gear mounted on the outer end of the said shaft, an internal gear meshing with said gear on the end of said shaft for giving motion thereto.

11. The combination with a reciprocating member or bed, of racks carried by said member or bed, means for reciprocating said member or bed including a shaft having a gear on its inner end, a fulcrumed bed motion rocker frame in which said shaft is journaled, a second gear mounted on said rocker frame and meshing with said first gear, means for rocking said bed motion frame whereby said gears are alternately brought into engagement with the respective racks for reciprocating the bed, a gear mounted on the outer end of said shaft, and an internal gear meshing with the said gear on the end of said shaft for giving motion thereto, said internal gear having an eX-' ternal gear meshing with a gear on the impression cylinder.

12. The combination with a recirocating member or bed, of racks carried by said member or bed, means for reciprocating said member or bed'includinga shaft having a gear on its inner end, a fulcrumed bed motion rocker frame in which said shaft is journaled, a second gear mounted on said rocker frame and meshing with said first gear, means for rocking said bed motion frame whereby said gears are alternately brought into engagement with the respective racks for reciprocating the bed, a gear mounted on the outer end of the said shaft, and an internal gear meshing with the said gear on the end of said shaft for giving motion thereto, said internal gear having an external gear meshing with a gear on the impression cylinder, and a driving pinion for giving motion to all of said gears.

18. The combination with a reciprocating member or bed, ofracks secured to the under saide of said bed and having downwardly projecting teeth, a fulcrumed bed motion rocker frame, driving pinions carried thereby journaled on opposite sides of said fulcrum and adapted to alternately engage said racks, means for rotating said pinions in opposite directions, means for moving the pinions alternately into engagement with said respective racks and for disengaging the same therefrom, and a reversing mechanism adapted to reverse the movements of said member or bed at each end of the stroke of the said member or bed, said reversing mechanism including a reciprocating bar having means at one end thereof adapted to periodically interlock with said member or bed at each end of the stroke of said member or bed, means for reciprocating said bar, and means for moving said bar at an angle to the direction of its re-- ciprocation for causing the engaging means carried thereby to engage and disengage the member or bed.

let. The combination with a reciprocating member or bed, means for reciprocating said member or bed including a fulcrumed rocker frame, a bed motion shaft journaled therein, gears operated by said shaft, de vices cooperating with said gears, whereby said member or bed is moved to and fro by said gears, a cam shaft having a gear, an intermediate cam shaft gear, and a driving pinion therefor mounted on said bed motion shaft, said intermediate cam shaft gear being-so proportioned that on the shifting of said driving pinion the latter will remain in a relative driving position with said intermediate gear.

15. The combination of a machine frame, a reciprocating member or bed, a pair of racks mounted on said member or bed, a fulcrumed bed-motion rocker frame, a main drive shaft in said frame at a distance from the fulcrum thereof whereby the shaft partakes of the movements of said frame, a gear on the inner end of said drive shaft, a second gear mounted on said rocker frame andmeshing with said first gear, means for of: said drive shaft, substantially as derocking saidfra'me, whereby said gears may scribed. 10 be brought one at a time into mesh with In testimony whereof I aflix my signatheir respective racks, a gear on the outer ture, in presence of two witnesses.

end of said drive shaft outside of the ma- ROBERT MIEHLE. chine frame, and a drive gear meshing with Witnesses:

said outer gear, said outer and drive gears ROBERT F. MIEHLE, J12,

remaining in mesh during the oscillations PAUL E. HARTUNG.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G.

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