US646872A - Tube for grain-drills. - Google Patents

Description

Pat t 'L wv' PUINDEXTER. en ed Apr. 3, |900. TUBE FDR GRAIN xmms;j

(Application led Fab. 8, 1900.)

. said tube.

NITED STATES PATENIDFFICE. ,a

JOHN WV. POINDEXTER, OF OYNTHIANA, KENTUCKY.-

`TUBE FOR GBAlN-DRILLS.

SPECIFICATION forming part of Letters ratentNo. 646,872, dated 'April 3, 190e.

Appiioationiea retrumye, 190e. senti Nugent. (No model.)

To tZZ whom it nung/concern:

Beit known that I,'JoHN W.-POINDEXTER, a citizen of the United States,fresidin g at Cynthiana, in the county of Harrison andState of Kentucky, have invented new and useful Improvements in Tubes for Grain-Drills, of which the following is a specification.

My invention relates* to grain-drill tubes; and the objects of the same are to provide a tube whichwill be practically indestructible, which will be flexible, but will not chokeup or buckle, which can be applied to grain-drills in present use, and which can be produced at a small cost. I attain these objects and advantages by means of the construction shown in the accompanying drawings, which form a part of this specification, and in which- Figure 1 is a side elevation of one .form of my improved tube attached to a grain-cup. Fig. 2 is a longitudinal section of a modification thereof. Fig. 3 is a detail perspective of a valve or flap which I may attach to the discliargeend of the tube to prevent clogging of Fig. 4. is a detail'view showing different means for attachment of the tube to cups of .dierent shapes. Fig. 5 is a detail perspective of a combined tube and cup made in accordance with my invention. Fig. 6 is a similar view of a modied form thereof. y

Like numerals of reference designate like parts in the different views.

Referring to Fig. l ofthe drawings, it will be seen that the tube is made of. a single length of resilient wire Wound upon a mandrel, so that the contiguous convolutions or coils are in contact from end to end of the tube. The wire from which the tube is made is of gradually-reduced size in cross-section from the upper to the lower end-that is to say, the wire is tapering in size. t The advantage gained by such a structure is that wherel a greater degree of flexibility is desirable (the discharge end) the Wire from which this portion of the tube is formed is of a smaller gage than the upper end, which tits the cup, and the upper end is of necessity sufficiently large to make a iirm connection with said cup; Instead of making the tube of a single length of tapering wire some of the advantages of this feature may be attained by the use of more than one gage of wire in the tube, as shown are connected by screwing one into the other.

It'r three piecesv are used, the intermediate piece may be of an intermediate gage and all the pieces are connected together to form a practically-continuous tube. The tube is tapering from end to end, and the numeral l designates the tube, and 2 3 two contiguous coils thereof.

vlA valve 4, consisting of adisk of substantially the required size to fit the dischargeopening 5 of the tube, is provided with two ears or lugs 6, and the lower coil of the tube is passed through perforations 7 in the lugs 6 to hinge the valve in place.

^ As shown in Fig. 4, different means may be employed for holding the upper end of the tube' to the cup 8. The end of the wire may be formed into a ring or loop.9, and a thumbnut l0 may be adjusted upon thevend of the wire to fasten the tube firmly to the cup, or the end of the wire maybe bent inwardly, as at l1, to form a projection which will spring into a perforation 12 in the cup. The upper end of the tube may be made flaring and of suchsize that two or more coils may be cut oif to make the tube t a small cup, or any number of coils may be cut off to tit dierent sizes of cups.

As shown in Fig. 5, a combined tube and cup lmay be formed either of a single piece of wire or of several pieces of different gage, as previously described. Inv forming the cup portion the wire is looped back and forth, as at 14, to form the upper porti'onof the cup, and the lower portion is then wound spirally, as hereinbefore described. In Fig. 6 a piece of metal 8 is used to form a foundation for the cup.

From the foregoing it will be obvious that my tube is strong and durable, will not buckle in use, and can be produced at a small cost.

The valve in the discharge end of the tube is set with its hinge toward the front end of the tube, so that dirt cannot enter the opening to clog it. If there is a pressure upon the valve, it closes, but immediately opens when the pressure is removed.'

roo

Having thus fully described my invention, what I claim is- 1. A combined grain-drill tube and cup made of Wire coiled spil-ally to form the tube,

of a disk hinged to the outer coil of the tube, substantially as described.

4. A combined graindrill tube and cup formed of Wire coiled spirally to form the tube and the cup being formed by loops in wire of larger gage than the wire from which the tube is formed, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

JOHN W. POINDEXTER.

Witnesses:

F. G. RADELFINGER, BENNETT F. JoNEs.

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