US1413498A - Ratchet drive for conveyers - Google Patents

Description

E. (3. SMITH. RATCHET DRIVE FOR CONVEYERS.

' APPLICATION FILED MAR. 25, 1920. 1,41 3,498. ate ted Apr- 18, 1922.

U I ED Y ST TE nm vns'r 0. SMITH, OFTCIHIGAGO, ILLINOIS, ASSIGNOR TO INrEENArroEAE HAEvEsrEE COMPANY, A CORPORATION OF NEW JERSEY. 1 Y

Pic. 7, i

" RATGHET DRIVE GONVEYERS. I

To all whom it may concern: Be it known that I, ERNEST C. SMITH, a citizen of the United States, residing at Chicago, in the county of Cook and State of 5 Illinois, have invented certain new and useful Improvements in Ratchet Drives for Conveyers, of which the following is a full, clear, andexact specification. I

3 My invention relatesto mechanical movements, and more particularly to one wherein reciprocating movement is translated into slow rotary movement through'a pawl and ratchet device at variable degrees of speed. One object of my invention is to provide a device of this type particularly: adapted for use in connection with the conveyer or apron drive of a manure spreader, and which will meet all requirements of a drive in this location.

Anotherobj set is to simplify the construction of such drives and reduce the number of parts employed to a minimum, while-providing means for varying the speed of transmission or rendering the transmission idle and assuring positive transmission of move- .mentat all speeds. I With these and other objects in view, I

employ a rocking lever or member having 9 and extends forwardly, and is connected one arm connected to a pawl and ratchet de- 0 vice of novel construction fixed to the conveyer shaft, and itsiother arm connectedto ."a reciprocating drive element actuated'by an eccentric on the axle. The .connection be- ;tween the leverarm and drive element being also novel. 1

s F My invention,acc0rdingly,consists of'the organization, details of construction, parts,

or their equivalents, hereinafter described,

wardly extending, arm of the rocking memf bar 7, and has a'ratchct wheel 21 fixed thereto., At oppositeflsides of the ratchet wheel I and moreparticularly defined in the claims. 40; Referring to the drawing-' 'Fig'ure'l is a side elevation of a spreader with' my transmission mechanism applied.

-thereto'; and, Q 5

Fig. 2 is an 7 enlarged retransmission mechanism. .2 My invention is illustrated in connection with a manure spreader" comprising the usual iwheel 'supportedbody'A, at the rear of which thereis mounted the beater B. secondary beater 'C, and scatterer D, all driven from plan View. of. the

V the rear. axle by.mechanism on the, o therside rear there is secured an upright angle iron "eccentric ring'18,'and to saidring is attached At the rear end fthelrockin'g member? Specifieationof Letters Patent. Patented. Apr, 18 1922. application filedmarch 26.1920. seriaim. 369,075. V A

of the spreader body and not shown. Parts 05 5118 draft and steering gear are shown.

' At the side of the spreader body near the member 5 with one web extending out wardly. To web there is secure dav for-f wardlyextendlng bracket 6, and on this bracket there 1s "mounted a horizontally extending rocklng member or lever .7. This member has its forward end .vertically'.

'gr o oved'0r forked as indicated' 8 Fig. 2). Th1s groove or fork cooperates with a strap 9 secured to the body of the spreader, and

formed with a portion. spaced therefrom :WhlCll is engaged by said fork and acts as a guide for the member.

- Themember 7 has its forwar'd 'arn'l formed with an arcuate slo-t lO, which extends from near the forked end of the arm rearwardly 'to a point in proximity to'the' pivot 11'. i At.

the point nearest'the pivot the slot 10lwidens land formsa ltriangular enlarged portion 12,

which is of a-width at its base equal to or 7 slightly greater than the throw of the'eccentric, hereinafter described. The slot 10 receives' the outwardly bent end 13 ofa link 14, which passes under strap to .an adjusting lelver l 5'gpivoted to the for- .ward :end of the'gspreader. Fixed to the axle 16-,is anQeccentric which carries the an arm orpitman 19 extending upwardly Yand pivotally connectedto the bent end 13 of the link 14- at the outer side of theslot 10.

The driyeshaft- 20 "for the apron or conveyerf 2031s located below the end of the reararms 22 are pivotally mounted 'onthe shaftf 20, and extend forwardly and rearwardly respectively to a point beyond the periphery of the ratchet wheel, wherethey-are bent or hooke'd and returned for some distance on g the opposite sideofsaidwheel.

there is' pivotally connected, a pair of links 23, the rear one of which is pivoted behind @Qd-lo8lOWhth6. forward e'lhese diverge downwardly, and their ends are bent inwardly at 24 and pass through the hooked ends of the arms 22 beyond the rim of wheel 21. On each of the bent ends 24 of the links and within the hooked ends of arms 22 there is mounted a pawl 25, the rear one extending downwardly and the forward one upwardly, and each held in contact with the ratchet wheel by a spring 26.

It will be evident from the construction above described that rocking of the member 7 on its pivot will cause alternate engage ment of the pawls 25 with the ratchet wheel, and cause a slow and almost continuous rotary movement of the shaft 20 to move the upper run of apron 20' in a rearward di rection. The rocking of the member 7, as will be evident, is effected through reciprocation of the pitman 19, and the extent of the rocking movement is determined by the position of the actuating element in the slot 10, the slowest movement being transmitted when it is at the extreme outer end of this slot.

When it is desired to render the transmission idle, the lever is drawn back to the position shown in Fig. 1, which places the actuating element in the widened part 12 of the slot, where it rec-iprocates idly. The dotted line positions shown in Fig. 1 illustrate one active position of the mechanism.

It will be seen from the above description that I have provided a simple and effective device torthe purposes described, and while I have described a specific embodiment of my invention, any modification thereof with in the scope of the appendant claims may be made.

What I claim as my invention is:

1. A drive mechanism comprising a rocking member having an arm, means for rocking the member including a reciprocating drive element shiftably connected with the arm, means for shifting the drive element along the arm, and means for causing the rocking member to become inoperative when the drive element is shifted to a certain posit-ion on said arm. Y

2. A drive mechanism comprising a rocking member pivoted between its ends, means for rocking the member including a reciprocating drive element shiftably connected to one arm of said member, means for shifting the drh'e element along said arm, a driven element operatively connected to the other arm of the member, and means for causing means for causing said rocking member to become inoperative when the pitman is moved to one end of the slot.

4. A drive mechanism for spreader aprons comprising a rocking member supported between its ends and having one of its arms formed with a slot enlarged at one end, a reciprocating drive element received in the slot, a driven element operatively connected to the other arm of the member, and means for shifting the drive element to and from the enlargedportion of the slot.

5. In a drive mechanism, a pivotally supported member formed with a longitudinal slot enlarged at one end, a reciprocating drive element received in the slot, and means for changing the position of the drive element in the slot.

6. In a drive mechanism, a pivotally supported member formed with a longitudinal slot enlarged at the end toward the pivot, a reciprocating drive element received in the slot, and means for changing the position of the drive element in the slot.

7 In a drive mechanism, a lever pivotally supported between its ends and with one arm formed with alongitudinal slot enlarged at one end, a reciprocating drive element received in the slot, and means for changing the position of the drive element" in the slot.

8. In a drive mechanism, a lever pivotally supported between its ends andwith one arm formed with a longitudinal slot enlarged at the end toward thepivot, a reciprocating drive element received in the'slot, and means for changing the position of the drive element in the slot. I

9. In a drive mechanism, alever pivotally supported between its ends and with one arm formed with a slot which has a triangular enlarged portion at one end, a reciprocating drive element received in the slot and having a throw substantially equal to the length of the base of said enlargement, and

means for shifting the reciprocating ele-- ment from position in said enlargement, where it operates idly, to position in the other portion of the slot, where it rocks the lever.

10. In a drive mechanism, a centrally pivoted lever having one arm formed with anarcuate slot terminating at the end toward the pivot in a triangular enlarged portion,

a reciprocating drive element connected in the slot and having a throw substantially equal to the length of the baseof said enlargement, and means for shifting the reciprocating element from position in said enlargement, where it operates idly, to variouspositions in the arcuate part-of the slot,

where it rocks the lever.

11. In a drive mechanism, a rocking arm having its free end forked; a fixed guide bar engaged by said fork, andmeans for rocking thearm com-prisinga reciprocating-element shiftable along the rocking arm. to vary its throw.

12. A ratchet drive mechanism comprisinga shaft, a ratchet wheel fixed thereto, an arm pivoted on the'shaft at each side of the ratchet and hooked across its periphery, a driving member adapted to reciprocate toward and from said ratchet, a pair of links pivoted to the'member at difierent points and having their ends connected across the 10

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