US737269A - Attachment for automatic loading-machines. - Google Patents

Description

No. 737,269. PATENTEDAUG} 25,1903.

T.- MOL- PARK. ATTACHMENT FOB. AUTOMATIC LOADING MACHINES. APPLIGATIOK FILED KAY 14, 1903.

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UNITED" STATES Patented August:25,:i 903.

PATENT OFFICE.

THOMAS MOLEAN PARK, OF DARRINGTON, WASHINGTON.

SPECIFICATION forming part of Letters Patent No. 737,269, dated August 25, 1903.

Application filed May 14, 1903 Serial No. 157,123; (No model.) I

To all whom it may concern.-

Be it known that I, THOMAS MOLEAN'PARK, a citizen of the United States, residing at Darrington, county of Snohomish, State of Washington, have invented an Improvement in Attachments for Automatic Loading-Machines;

and I hereby declare the following to be a full, 7

device to which my improvement is applied. 7

Fig. 2 is a plan of the conveyer-frame, showing application of the improvement. Fig. 3 is a detail of same. Fig; 4 is a side elevation of a fragment of the frame with shovel and earns. r t

A represents a suitably-supported conveyerframe having the power-drivensprockets 2 at each end, with their axes perpendicular to the plane of the frame, around which passes a chain conveyer 2*, provided with the carrier blades or shovels 3, cooperating with the lat eral trough-sections 4 to transport a load from one end of the frame to the other. r

Fig. 1 shows a usual method of mounting the frame so that itmay have a tilting movement about a horizontal pivot-shaft on a movable support or truck, as 5, and means ll'ldlr cated at 6 for operating the conveyor and for propelling the truck 5. The driving connections of the motor Gare not shown, as they form no part of the present invention. The frame sides forming the inner walls of troughs 4 are slotted lengthwise, as at 7, to accommodate the pivoted ends of the blades or arms. The latter, as illustrated, each comprise a web or bracket'portion having a backwardly-extending bifurcated roller-bearing heel 8 straddlin g slot 7. The frame sides, which are preferably of channel-iron, with their fiat surfaces outward, are continuous and curved at the ends of the frame concentrically with the sprockets, sothat the blades are supported at all points in their travel ,7 In operation the blades are adapted suctrough-sections 4. to the opposite end of the frame,where it is discharged,the empty blades returning through the other trough-section.

Inorder to prevent the material binding between a blade and the outer wall 10 of the conveyer-trough at the point where the blade passes around. .the end of the frame and scoops up its load, it was found necessary to devise some means to throw the point'of the blade farther forward, so that its point and pivot would stand in a line more nearly at right angles to wall 10 at the point where the latter first cooperates with the blade. This was partially achieved by curving the blades. Still, however, it did not fully overcome the diffiof the eccentric surfaces or'segmental cams 9, secured to the loading end of the frame, one

on either side of slot 7 and disposed in the path of the blade-supporting rollers 12. The

result is that the points of the blades are thrown forward in advance of what they would be by their natural movement about the sprockets,and as they move into the conveyortrough between wall '10 and its corresponding frame side they are nearly at right angles to the axis of the machine. The load is therefore pushed directly forward with little or no tendency to deflection outward and consequent binding against wall 10. The cams release the blades as the latter become well started into the channel with their loads, the length of the cams depending to some extent on the curvature of the blades. By means of these cams it is possible to use straight blades; but in their absence it would be practically impossible to operate with straight blades, particularly where soft material is to be handled.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is- Y 1. In a loading apparatus, the combination of a suitable support, anendlessconveyer having radially-projecting pivoted carrierblades, and stationary means interposed in the IOO having radiallyprojecting pivoted carrier of a conveyer-frame, a lateral conveyer-- trough, an endless conveyer having radiallydisposed pivoted blades projecting into and cooperating with said trough to convey a load from one end of the frame to the other, and stationary means interposed in the path of said blades adjacent to the receiving end of said trough to advance the points of the blades.

4. In a loading apparatus, the combination of a oonveyer-frame, a lateral trough, an endless conveyer having outwardlyprojecting blades extending into and cooperating with said trough and adapted to take up a load at one end of the frame and to discharge it at the other, and fixed cams interposed in the path of said blades adjacent to the point of loading for the purpose described.

5. In a loading apparatus, the combination with a frame, of lateral troughs, an endless chain traveling about sprockets carried by and Whose axes are substantially perpendicular to said frame, blades pivotally connected with the chain and projecting through slots in the frame-walls into the troughs, a rearwardly-extending projection on each blade normally supporting the blades at approximately right angles to the planes of the chain, and stationary means disposed in the path of said projections for augmenting the forward tilt of the blades.

In Witness whereof I have hereunto set my hand.

THOMAS MCLEAN PARK. \Vitnesses:

GEO. 0. BALL, E. L. DAWSON.

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