US402654A - Automatic reversing mechanism - Google Patents

Description

- (No M odel 2 Sheets-Sheet, 1 J. a. CRAWFORD. V M AUTOMATIC REVERSING'MEGEANISMi No. 402,654. I Patented May 7, 1889.

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J. G CRAWFORD. AUTOMATIG REVERSING MEGHANISM.

" N0.,4OZ.,654. V Patented May 7,1889.

UNITED STATES PATENT OFFICE.

JAMES G. CRAWFORD, OF BOSTON, MASSACHUSETTS.

AUTOMATIC REVERSING MECHANISM.-

SPECIFICATION forming part of Letters Patent No. 402,654, dated May '7, 1889.

I Application filed May 28, 1888. Serial No. 275,287. '(No model.)

To all whom it may concern.-

Be it known that I, JAMES G. CRAWFORD, of Boston, in the county of Suifolk and State of Massachusetts, have invented certain new and useful Improvements in Automatic Reversing Mechanism, of which the following is a specification.

' of the yielding latch or detent which holds bar.

the shipper-bar at the ends of its movement, said view showing also a part of the shipper- Figs. 5 and 6 represent a modification of means for moving the shipper-bar.

The same letters of reference indicate the same parts in all the figures.

In the drawings, (it represents the fixed casing, containing the rotary cylinder of a washing-machine.

b I) represent the belts which transmit power to said cylinder from a prime motor, one of said belts being open and the other crossed, so that one rotates the cylinder in one direction and the other in the opposite direction.

a 0 represent loose pulleys mounted on a driving-shaft, e, which is journaled in bear iugs in a frame, f, attached to the-end of casmg a.

01 represents a pulley affixed to said shaft between said loose pulleys.

To the driving-shaft e is affixed a gear, 9, Which meshes with a larger gear, h, affixed to the driven shaft?) of the washer-cylinder. A worm, j, is formed on the hub of the loose pulley c, said worm meshing with a worm- Wheel, k, on a shaft, Z, which is journaled in a bearing on the frame f.

m represents the shipper bar, Which is adapted to slide in guides n n on the frame f, and is provided with the usual guide rods or ,arms, 0 0',- which engage the belts b 6'. (See Figs. 1 and 3.)

p represents a guide-rod attached to the frame f and arranged parallel with the shipper-bar. slot or groove, 0*, which receives a pin or stud, s, affixed eccentrically to a wheel or disk, 6. Said wheel is affixed to a shaft, it, which is journaled in a bearing on the frame J". On the shaft u is a sprocketwheel, e, which is connected by a sprocket-chain, w, with a sprocket-wheel, a, affixed to the shaft Z of the Worm-wheel 7c.

The slide g has a pin, e, which projects into a slot, f, in a lever, g, said lever being pivoted at h to the shipper-bar. The belt I), which drives the loose pulley c, is of suliicient width to rotate said pulley when said belt is shipped onto the fast pulley d, so that the rotation of the loose pulley c is continuous and a continuous rotation is imparted therefrom to the shaft to and its disk 25 through the worm j, worm-wheel 7c, sprocket-wheels a o, and chain w. The rotation of the disk 25 causes the pin 5 thereon to revolve and reciprocate the slide (1 by its engagement with the slot 0 of said slide, the movement thus imparted to the slide being longer than the slot f of the lever g, so that the stud 'e onthe slide, after making a part of its movement in each direction, strikes an end of the slotf and moves the lever g and shipper-bar mwith it during the remainder of its movement. The shipperbar is thus moved first in one and then in the opposite direction, the movement given to it being sufficient to shift the belts and reverse the rotation of the driven shaft 1' at each movement of the slide q. The lever g has a handle, g, by which it may be turned to the position shown in dotted lines in Fig. l, and when it is in said position the slide q will reciprocate without moving the shipper-bar.

it represents a spring catch or detent at tached to the frame f and formed atits free end to spring into grooves Z Z in blocks at tached to the shipper-bar. Said blocks are so arranged that when the shipper bar is at one end of its movement the block Z will engage the cat-ch, and when the shipper-bar is at the opposite end of its movement the block Z" willengage said catch. The shipper-bar is thus held at each extreme of its movement On said rod is a slide, q, having a' with suflicient firmness to prevent its accidental displacement.

It will be seen that the described devices constitute a simple and effective means for operating the shipper-bar at the desired intervals.

I have shown in Fig. 5 a modification in which the slide q and the lever g with its slot f are dispensed with, and the shipperbar is provided with an enlargement having an endless slot which includes the are-shaped portions 2 3, having the same radius as the pin 8 and the straight vertical portions 4 5. Assuming the rotation of the disk t to be as indicated by the arrow in Fig. 5 and the shipper-bar to be in the position shown in said figure, it will be seen that the portion 2 of the slot is parallel with the are in which the pin 8 moves, so that while said pin is moving through the portion 2 it will have no eifect on the shipper-bar; but'when. the pin reaches the lower end of the portion 2 and enters the vertical portion 4 it will, in passing through the latter, move the shipper-bar to the position shown in Fig. 6, thus bringing the portion 3 into coincidence with the arc in which the pin 3 moves, so that the shipper-bar remains at rest while the pin is passing through the portion 3 and until it enters the vertical portion 5, when the pin, acting on said portion 5, moves the shipper-bar in the opposite direction to the position shown in Fig. 5. By this modification the same movements are given to the shipper-bar as by the devices above described.

It will be seen that the rapidity of the reversing movements of the shipper-bar depends 011 the relative proportions of the sprocketwheels a and 1*; hence by increasing the relative size of the sproeketrwheel ct the movements of the shipper-bar will be more frequent, and vice versa.

I claim 1. The combination of the driven shaft Z, the driving-shaft e, geared to the driven shaft, the fast pulley (Z and loose pulleys c c 011 the driving-shaft, the worm j on the hub of the loose pulley c, the shaft Z, having the wormwheel 7c, meshing with said worm, the sprocket-wheel a on the shaft Z, the shaft u, having the sprocket-wheel o and the eccentric-pin s, the sprocket-chain w, connecting the wheels a r, the shipper-bar m, and means, as described, between the shipper-bar and the cocentric-pin 5, whereby said bar is reciprocated by the revolutions of said pin, as set forth.

2. The combination of the driven shaft 1, the driving-shaft e, geared to the driven shaft, the fast pulley d and loose pulleys cc on the driving-shaft, the worm j on the hub of the loose pulley c, the shaft Z, having the wormwheel 70, meshing with said worm, the sprocket-Wheel a on the shaft Z, the shaft u, having the sprocket-wheel 'v and the eccentric-pin s, the sprocket-chain w, connecting the wheels a o, the slide q, adapted to move on a fixed guide and provided with a slot, 1", receiving the pin 3, and with a stud or pin, 6, and the shipper-bar m, engaged, as described, with the stud or pin 6', as set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 25th day of May, A.

JAMES G. CRAWFORD.

Vitnesses: 1

C. F. BROWN, A. D. HARRISON.

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