US753389A - Mechanical movement - Google Patents

Description

No. 753,389. I PATENTED MAR. 1, 1904,

B. HALL.

MECHANICAL MOVEMENT.

APPLIIOAIION nun mm; 8.190s.-

2 SHEETS-SHEET 1.

1T0 MODEL.

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No. 753,389. PATBNTED MAR. 1, 1904.

B. HALL.

MECHANICAL MOVEMENT.

APPLIUATION FILED JUNE 8,1903.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

Patented March 1, 1904.

BIOKNELL HALL, OF TAUNTON, MASSACHUSETTS, ASSIGNOR TO THE HUBER-HODGMAN PRINTING PRESS COMPANY, OF TAUNTON, MAS- SACHUSETTS, A CORPORATION OF MASSACHUSETTS.

MECHANICAL MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 753,389, dated March I, 1904.

Application filed June 8, 1903. Serial No. 160,455. (No model.)

To all whom it may concern:

Be it known that I, BICKNELL HALL, a citizen ofthe United States, residing at Taunton, county of Bristol, State of Massachusetts, have invented an Improvement in Mechanical Movements, of which the following descrip-' tion, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

This invention relates to a mechanical movement which is particularly adapted for use in that type of printing-presses in which the form is carried by a bed having a reciprocating movement under the impression-cylinder, the bed being driven during the greater portion of its stroke by a rotating gear which meshes alternately with two parallel racks secured to the bed, a reversing device controlling the bed at each end of the stroke and reversing its motion gradually while at high speed. 7

The-invention in particular relates to the mechanism for shifting the engagement of the rotating gear with the parallel racks secured to the bed, means for driving the gear at a uniform speed when in mesh with the racks, and to the construction of the parts, whereby strength and rigidity are assured.

Figure l is a vertical elevation, chiefly in cross-section, of a portion of a well-known form of printing-press, showing parts relating to this invention. 'Fig. 2 is a plan view of a portion of the mechanism shown in Fig.

1. Fig. 3 is a side elevation of a portion of the mechanism shown in Fig.- 1, illustrating the parts with the rotating gear in mesh with the upper rack. Fig. 4 is a cross-section corresponding to Fig. 3, but showing the rotating gear in mesh with the lower rack. Fig. 5 is a side elevation, and Fig. 6 a plan view, of theunison-ring, hereinafter referred to.

A represents the standard or main frame of the printing-press, in which is journaled the bearings'B of the usual impression-cylinder C, and this standard or frame is provided with brackets a, on which the bed D, carrying the former, moves back and forth, antifriction-rolls I) being interposed between. the

' former and the brackets 00.

the impression-cylinder are arranged to per- 5 The bearings of mit of its being slightly raised during the non-printing stroke of the bed carrying the,

form, and the impression-cylinder makes two revolutions to each complete stroke of the bed; but the operation of all these parts is lower of which, E, is attached to" the bed by means of a depending bracket E The main shaft F and the auxiliary shaft G are suitably journaled in the main frame A.

A large gear H is mounted on one end of the auxiliary shaft G, and this shaft is driven by means of a pinion 7i, mounted on the main shaft F and intermeshing with the gear H. A gear K on the opposite end of the auxiliary shaft G, intermeshing with the gear K on the impression-cylinder, serves to revolve the im- 7 pression-cylinder.

'A crank-pin H carried by the gear H,

usually'known as the reversing-gear, op-

erates in anywell-known manner, as with vertical shoes, (not shown,) carried by the hanger 7 E to reverse the movement of the bed D at each end of its stroke.

The bed-driving gear L is mounted between and in line with the parallel racks E E upon an eccentric-sleeve M, which eccentric-sleeve M is in turn mounted upon a rigid bearing N, formed on the main frame A eccentric to the auxiliary shaft G. The eccentric-sleeve M forms the bearing upon which the bed-driving gear L is journaled, and it is provided with an, 5

arm M by means of which it may be shifted so as to cause the engagement of the beddriving gear L either with the upper rack E or the lower rack E, as desired, in the movement of the bed. As a means for adjusting 9 this eccentric-sleeve M at the proper timeviz., at the end of each reciprocation to cause the bed-driving gear L to mesh with the proper rack E Ethe arm M is shown connected by a link 0 to a lever O, pivoted at O to a stationary part of the machine, the said the upper rack E or the lower rack E. 5 parts are preferably arranged so that the uni- 3 scribed is apparent.

lever being operated through a stud 0 thereon and a cam-groove P in one face of the gear P. The gear P is mounted on an auxiliary shaft P and receives its motion from'a 5 pinion R on the main shaft F.

The bed-driving gear L receives its motion from the reversing-gear H through what is herein termed a unison-ring. The unisonring S (shown in Figs. 5 and 6) is provided I on one side with diametrically-alined projections S, fitting into diametrically-aimed slots or grooves L in the bed-driving gear and on the opposite side with projections S alined diametrically, but at a right angle to the line I5 of the projections S, and fitting into corresponding slots or grooves diametrically arranged in the face of the reversing-gear H. By means of this unison-ring S motion is transmitted from the reversing-gear H to the V bed-driving gear L, and the speed of the beddrivirig gear L always remains uniform and equal to that of the reversing-gear H, whether the bed-driving gear L is 1n engagement with The E- and is driven at a uniform speed, the reversing-gear H, the unison-gear S, and the beddriving gear L being then in concentric position. When the end of the rack E is reached and the reversing mechanism comprismg the stud H of the reversing-gear H comes into 4 action to reverse the bed, the eccentric-sleeve M is shifted, through the agency of the cam P and other parts hereinbefore described, from the position shown in Fig. 3 to the position shown in Fig. 4, thus causing the bed-driving gear L to be lowered out of engagement with the upper rack E and into engagement with the lower rack E. During the return reciprocation of the bed it will be seen that the unison-ring occupies a varying eccentric po- 5 sition, owing to the fact that the shifting of the bed-driving gearL has rendered it eccentricto the reversing-gear H, which is the driving member; but the uniform speed of the bed-drivinggear L is maintained by reason of the gradual'shifting of the unison-ring S to compensate for its eccentricity, the projections S sliding in the grooves -L in the bed-driving gear and the projections S sliding 'in the grooves in the bed-reversing gear H; 'When the end of the lower rack E is,

reached the reversing mechanism again comes into action to reverse the bed D. The eccentricsleeveM, through the agency of the cam P and-the parts above described, is again shift- From the foregoing description it will be seen that the construction of the parts is such that the bed-driving gear is firmly and rigidly supported upon its bearing whetherin its upper or lower rack-engaging position and that its uniformity of motion is secured in bothpositions. This is accomplished without the shifting or moving of any of the shafts of the printing-press and by moving the gear itself only to the extent to disengage it from the .teeth of the rack. Hitherto it has been customary either to shift the entire shaft and other connected mechanism with the bed-reversing gear or else to move the gear itself upon the shaft laterally, the racks being placed out of vertical alinement. In the former case the construction is necessarily such as to prevent rigidity, and in the latter case comparatively extensive movement is necessary in or-' der to disengage the gear from the rack laterally.

It Will be noted that the rigid bearing N extends within the plane of the racks E E and the cooperating gear L and that the eccentricsleeve M also extends within the same plane, making a compact, rigid, and strong construction, so that the force of reciprocating the bed acts directly against the rigid bearing and there is. no tendency to deflection of the parts.

While the reversing-gear has been shown as the driving member for operating the bed-reversing gear, it is evident that any other rotary member may be employed in lieu thereof, the unison-ring being connected with such rotating member and the bed-reversing gear in the manner above specified.

-While the unison-ring is herein shown and described as consisting of a ring-shaped part with projections on opposite sides, it is evident that the projections themselves are the operative parts of the device and all that is essential to this feature is that the four projections shall be fixed in position with respect to each other. This, obviously, may be secured in other ways than by the ring-shaped connection illustrated. 7

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

1. Reciprocating 'bed-niotion comprising bed-racks, a gear located in the same plane with said racks, a stationary bearing for said gear extending within the plane of said racks and gear, means for shifting said geartransversely to said bearing to engage alternately the bed-racks.

2. Reciprocating bed motion comprising bed-racks, a gear located in the same plane with said racks, a stationary bearing for said gear extending within the plane of said-racks and gear, means for shifting said gear transversely of said bearing to engage alternately the bed-racks, means for giving a uniform rotation to said gear when in engagement with either rack.

3. Reciprocating bed motion comprising bed-racks, a gear located in the same plane with said racks, a stationary bearing for said gear, an eccentric-sleeve between said bearing and said gear, the said stationary bearing and eccentric-sleeve extending within the plane of said racks and gear, means for shifting said eccentric whereby said gear is shifted transversely of said bearing to engage alternately the bed-racks.

4. Reciprocating bed-motion comprising bed-racks, a gear located in the same plane with said racks, a stationary bearing for said gear, an eccentric-sleeve between said bearing and said gear, the said stationary bearing and eccentric-sleeve extending within the plane of said racks and gear, means for shifting said eccentric whereby said gear is shifted transversely of said bearing to engage alternately the bed-racks, means for giving a uniform rotation to said gear when in engagement with either rack,

5. Reciprocating bed motion comprising bed-racks, a gear located in the same plane with said racks, a stationary bearing for said gear, means for shifting said gear transversely to said bearing to engage alternately the bedracks, a rotating member concentric with said gear when in one of its rack-engaging positions, connections between said rotating member and said gear whereby uniform rotation is imparted to said gear when in engagement with either rack.

6. Reciprocating bed motion comprising bed-racks, a gear located in the same plane with said racks, a stationary bearing for said gear, means for shifting said gear transversely to said bearing to engage alternately the bedracks, a rotating member concentric with said gear when in one of its rack-engaging positions, a unison-ring having diametricallyalined projections on one face in diametricallymovable engagement with said rotating member, perpendicularly-arranged diametricallyalined projections on the other face in diametrically-movable engagement with said gear, whereby uniform rotation is imparted to said gear when in engagement with either rack.

7. Reciprocating bedmotion comprising bed-racks, a gear located in the same plane with said racks, a stationary bearing for said gear extending within the plane of said racks and gear, means for shifting said gear transversely to said bearing to engage alternately the bed-racks, a rotating member, connections between said rotating member and said gear whereby uniform rotation is imparted to said gear when in engagement with either rack.

.8. Reciprocating bed-motion comprising bed-racks, a gear located in the same plane with said racks, a stationary bearing for said gear, means for shifting said gear transversely to said bearing to engage alternately the bedracks, a rotating member, a unison-ring having diametrically-alined projections on one face in diametrically-movable engagement with said rotating member, perpendicularlyarranged diametrically-alined projections on the other face in diametrically-movable engagement with said gear, whereby uniform rotation is imparted to said gear when in engagement with either rack.

9. Reciprocating bed-motion comprising bed-racks, a gear located in the same plane with said racks, a rotating member, a stationary bearing for said gear eccentric to said rotating member, an eccentric-sleeve between said bearing and said gear so arranged that said gear will be concentric to said rotating memberwhen in one of its rack-engaging positions, means for shifting said eccentric-sleeve whereby said gear is shifted transversely of said bearing to engage alternately the bedracks, means for giving a uniform rotation to said gear when in engagement with either rack.

10. Reciprocating bed-motion" comprising bed-racks, a gear located in the same plane with said racks, a rotating member, a stationary bearing for said gear eccentric to said rotating member, an eccentric-sleeve between said bearing and said gear so arranged that said gear will be concentric to said rotating member when in one of its rack-engaging positions, means forshifting said eccentric-sleeve whereby said gear is shifted transversely of said bearing to engage alternately the bedracks, means connecting said rotating member and said gear whereby when the rotating member is rotated uniformly a uniform rotation is given to said gear when in engagement with either rack.

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

' BIOKNELL HALL.

Witnesses:

W'ILLIs K. HODGMAN, FREDK. M. A'I'wooD.

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