US857396A - Dredge-bucket. - Google Patents

Description

No. 857,396. PATBNTED JUNE 18, 1907.

I. B. HAMMOND.

DRBDGE BUCKET.

APPLICATION FILED FEB. 12. 1907.

rs o his No. stress.

Specification of Letters Patent.

Patented June 21%,

Application filed February 12,.l907; Serial Ho. 366,946.

To all; whom it may concern:

Be it known that I, lsAAo B. HAMMOND, a citizen of the United States, residing et Portland, in the county of Multnomeh end 5 State of Oregon, have invented certain new and useful Improvements in Dredge-Buckets, of which the following is. a, specification.

My invention relates to improvement in the construction of dredge buckets of the type which in practice are mounted in an endless chain to travel longitudinally about a dredge ladder and dig as they near the end of their outward course and dump their contents at the end of their inward course.

Much difficulty has been exnericnced hitherto in .the operation of dredges of this class, when digging clay or material of s clayey nature on account'of the failure of the uckets .to discharge their contents. es The sticky nature of the materiel often ceuses it to adhere so tenscionsly to the in- I nor surfaces of the buckets that it will not free itself by its own Weight when the buckets are 'overturined. 'My object is to overcome clificulty by ,providing the buckets of a, construction winch renders them self-claiming us they upset in passing over the end of the dredge ladder. lnthe sccom shying dro'winglhsve shown 3, only-cs0 h e o dredge of the Well known trsveling ticket type to illustrate the preferredconstruction and mode of operation of my improved selficlcsning bucket.

I Referring to the drawing: Figure 1 is s. broken longitudinal section of the upger,

pivoted' en portion of a swin dre ladder, with my im rovem'ents gilded thereto; and Fig: 2 a plan view of my improved bucket. y

In practice, the ladder-frame 3 my be pivctedst its up or end upon a. drive-shaft 4,

which is 'ourns ed in the main frame, not,

shown, 0 the dredge, end csrries s pair of similar chain-driving tumblers 5, all the parts mentioned bein of well known construction. Esch bucket 6 is of outwardly flexing shape reinforced with e cutting edge plate endhalving a. bsse'or bottom 8. Extending spproximotely the full length of each bucket and firmly secured thereto are parallel beck; word extending lugs 9 held between compenion links 10 of parallel endless chains. The links 10 are pivotelly connected at their oppositeends by means of pins 13 110 similar forced bodily outward, against the resistance links 11 carrying flangedplstes or overflow trays 12, as shown. In each bucket is s plunger or felse-bottorn 15 on the end of a. curved chennel bar or lever 16. The lever at its op" osite end is pivoted upon a, pin 17 psssin t ough bearing cars 18 on the book of the ucket; and between its ends the lever gasses through a slot or opening 19 in the ask of the bucket near the base. A spring 20 confined between the lever and heels of the bucket tends normally to press the levcr outward, at its curved ortion, and thus force the pl er or fulseottom 15 against the base 8. ounmd on acentrel extension 21 of the ladder is s roller 22 forming o. shoulder in the path of the levers 1.6 to engage and swing them against the resistance of their springs as the buckets are upset in passing over the tumblers. u

In operation, as a bucket with its contents moves around the discharge end, of the ladder shown, contact of a lever 16 with the roller 22 causes the lever to be swung on its pivot, as stated, and force the plunger 01' felse-bottom 15 in the direction of the mouth of the 'bucket. This causes the contents to be of any tendencyit may have to adhere to the flexing surfaces of the bucket. -But slight .movement of the plunger is necessary to so loosen a. mess of sticky clay that it will fall biodily from the bucket and leave the letter 0 can.

If desired the spring 20 may be dispensed with, because in the digging operation the material enteri the bucket will naturally tend to seat the else bottom.

What I claim as new and desire to secure by Letters Patent is 1. In a. dredge, the combination with o traveling bucket formed with an outwardly- 9 5 fisring surrounding wall, of s, bodily-movable, bucket-contents loosening, plunger in the base-portion of the bucket surrounded by said Well, an actueting lever for the plunger carried by the bucket, and. c shoulder in the path of travel of the lever, for the purpose set forth.

2. In a dredge, the combination with a traveling bucket formed with a. bottom and an outwardly flaring surrounding wall, of s bodily-movable bucket-contents loosening, plunger in the baseortion of the bucket sunrounded by said we an actuating lever for the plunger carried by the bucket, audio, shoulder in the path of travel of the lever, for the purpose set forth.

3. In a dredge, the eoi'nbination of a dredge bucket, movable sprii'ig-returned (liseliarginguneehanism extending into the base )ortion of the bucket, means for moving the bucket to its discharging position, and actuating means for said discharging-mechanism in the path of movement thereof.

4. ln eombination, a traveling and upsetting dredge-bucket; having an outwardl vl llaring surrounding wall, a movable plunger in. the base of the bueket, surrounded by said wall, a eurved lever pivoted at one end to one side. of the buoket outside the same and operatively connected at its opposite end with the plunger, and a shoulder in the path of the curved portion of the lever, substantially as and for the purpose set forth.

5. In combination, a traveling and upset ting dredge-burket, a movable plunger in the base of the bueket, a curved lever pivoted at one end to one side of the bueket and o wratively eonnet-ted at its op )osite end wit 1 the plunger, a spring eonline between the lever and side of the bucket, and a shoulder in the t path of the curved portion of the lever, all ('onstrutted to operate substantially as and l for the purpose set forth.

ISAAC B. HAMMOND. lu presence of:

.I. W. DYRENFORTII, II. E. CoweiLL.

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