US1023660A - Dipper-dredge. - Google Patents

Description

B. KRBHER.

DIPPER DREDGB.

APPLICATION mum APR. 3, 1911.

Patented Apr. 16, 1912.

2 SHEETS-SHEET 1.

INVENTOR ATTORNEYS COLUMBIA PLANOGIAPM fill-,WASHINETON. u. c.

B. KREHER.

DIPPER DREDGE.

APPLICATION FILED Arms, 1911.

Patented Apr. 16, 1912.

2 SHEBTSSHEET 2.

ATTORNEYS COLUMBIA PMNDGRAPH co., wasumtn'on, b c.

UNITED STATES PATENT OFFICE.

ERNEST KREHER, 0F TAMPA, FLORIDA.

DIPPER-DREDGE.

To all whom it may concern:

Be it known that I, Ennas'r Kinsman, a citizen of the United States, and a resident of Tampa, in the county of Hillsboro and State of Florida, have invented a new and Improved Dipper-Dredge, of which the following is a full, clear, and exact description.

This invention relates to dipper dredges, and has reference more particularly to a dredge of this class which comprises a boom, a cannon pivotally associated with the boom, a dipper stick slidable relatively to the cannon, a dipper carried by the stick, and means for actuating the dredge.

An object of the invention is to provide a simple and efficient dipper dredge which has a large range of operation, which can be easily controlled, and in which more than the entire length of the dipper stick is effective in the operation of the dredge.

A further object of the invention is to provide a dipper dredge which has a cannon pivotally associated with the boom. to increase the range of the dredge. means bein provided for clamping and locking the dipper stick relative to the cannon, at

any desired point of the travel of the stick.

The invention consists in the construction and combination of parts to be more fully described hereinafter and particularly set forth in the claims.

Reference is to be had to the accompany ing drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views, and in which Figure 1 is a side elevation of an embodiment of my invention. showing certain of the parts in different positions in dotted outline; Fig. 2 is a perspective view of the cannon, having parts broken away. and showing a portion of the dipper stick: Fig. 3 is a fragmentary plan view of the dipper stick; Fig. 4 is an enlarged transverse section of the dipper stick and the cannon. showing the means for clamping these parts relatively to one another. and Fig. 5 is a side elevation of the rear end of the dipper stick and the corresponding extremity of the cannon. showing a spring lock used with the dipper stick.

Before proceeding to a more detailed ex planation of my invention. it should he clearly understood that the dr dge. While particularly useful for example. in digging Specification of Letters Patent.

Application filed April 3, 1911.

Patented Apr. 16, 1912.

Serial No. 618,604.

phosphate, can also be used for other purposes to which dredges of this character are usually applied.

W'ith the ordinary dredge, the dipper handle or stick has a fairly limited travel in the direction of its length, and its rear end cannot pass beyond the center of the boom under any circumstances. I provide an extension cannon, which is slidably associated with the dipper stick and acts as a guide therefor. permitting the stick to pass well beyond the boom. In this way the range of the dredge is materially increased and the depth to which it can dig is augmented. I also provide means for clamping the dipper stick and the cannon so that these parts can be held at any desired point of travel of the stick.

Certain of the details of construction shown for example l1erewith,"form no part of the invention. and can be varied in accordance with individual preference and special conditions, without departing from the underlying spirit of the invention.

Referring more particularly to the drawings. I provide a boom 10, which may be of any suitable construction. As shown for example. it consists of a lattice member having at the upper end a sheave 11 or sheaves, and having its lower end mounted to swing upon a suitable support 12 of the usual construction. The boom is supported by means of a guy 13. extending to the top of a strut member 14 held by brace lines 15, or in any other suitable manner. A platform 16 serves to carry the parts of the dredge. Needless to say, the platform may be replaced by a carriage or any other suitable support. This platform is usually a floating dredge hull. Near the center, the boom has a pair of bearings 17, in which are journaled lrunnions 13 of the cannon 19. The cannon is of rectangular cross section and is fashioned from side members 20. consisting ol channels. and top and bottom members 21 consisting of plates riveted to the flanges of the munou. The trunnions 18 are carried hv plates 22. riveted lo the channels 20.

The dipper slick 23 is of any suitable length. and consists of two spaced bars or member ll. preferably of wood. armored 25, to secure the parts together. At the front or lower end, the stick has extensions 28 forming part of the hinges 29 of the dipper or bucket 30, and serving to secure the latter to the stick or handle. Links 31 connect the dipper stick and the bucket, which may be of any preferred or common form. The dipper has a bail 353 having a sheave 33, serving for the operation of the dipper. The hoisting cable 34 is secured to the bail and passes about the sheaves 33 and 11, and along the boom to the driving mechanism (not shown).

A stop block 35 is located within the can non, at the front or lower end thereof, and is secured in position by means of a bolt 36, or in any other suitable manner. It is re ceivcd between the side bars 24 of the stick and serves to limit the movement of the stick in the direction of its length, the stop engaging at the spacing member 25, to pre vent the stick from passing entirely out of the cannon.

I provide a clamping device 37, which consists of a collar 38, encompassing the cannon, and fashioned in two sections or halves 39, provided with laterally disposed flanges 40, secured together by means of bolts or rivets 41, the flanges being located at the top and bottom of the cannon. Hub plates 42 are secured by means of bolts or rivets 43, at the sides of the collar, and have hub extensions 44, which project into openings 45 in the collar sides. One of the hub plates has a threaded opening 46 therethrough in which is arranged a correspond ingly threaded clamping screw *7, having associated therewith, at the inner end, a clamping jaw member 48, movable in an opening 49 of the corresponding channel side 20 of the cannon. The clamping jaw has at the outer edge a flange 50, and it is adapted to engage the corresponding side bar 24 of the dipper stick. A clamping arm 51 is rigidly secured in any manner, at the outer end of the clamping screw 47, and has pivotally connected to the end thereof, a link 52. The link is pivotally connected with the piston rod 53 associated with a piston 54 in a cylinder The latter is mount.- ed by means of brackets 56, upon the side of the cannon, and is adapted to receive steam or other fluid under pressure. so that. the piston can be actuated in any desired or well-known manner to operate theclamping device. The other hub plate has a threaded opening 58 in which arranged a orre spondingly threaded adjusting l\'.\\' .311 having associated therewith at the inner end. a. clamping jaw member i similar to the member LB. and like it. provid d with a flange. 61. The jaw mem er ti-tt is inoia hthrough an opening ii? in the oth r side oi the cannon, and adapted to t-ngagithr j corresponding side bar 24 of tho dlpprrt stick. A winged head 63 is mounted upon the outer end of the adjusting screw, which has a squared extremity 64 serving for the manipulation thereof. Vl hen steam is admitted to the cylinder 55 it actuates the piston, which in turn swings the arms 51. then the latter is moved in one direction it assists the clamping screw 47, and forces the jaw member against the dipper stick, so that the latter is locked relative to the cannon, the stick being clamped between the two jaw members 48 and 60. The screw 59 serves for the adjustment of the normal distance between the jaw members, and by means of it, allowance can be made for the wear of the parts. It will be understood that the operation of the dredge, other than that described above, is the usual one.

I employ the spring lock 26 to hold together the sides 24 of the dipper stick at the end remote from the dipper when the dipper stick is so arranged that its rear or upper extremity projects materially beyond the corresponding end of the cannon. The spring lock 26 comprises pairs of doubly curved spring arms 65 which have a releas able, pivotal connection 66. At the inner faces of the dipper stick sides 24 at the rear ends, are blocks 67 constituting stops adapted to be engaged by the stop 35 of the cannon, to prevent the stick from passing on tirely out of the cannon. The spring arms have oflset parts 68 which engage at the end of the cannon when the dipper stick is pass ing through the same to its extreme extended position. The offset parts 68 of the arms form shoulders, so that the engagement thereof with the end of the cannon releases the pivotal connections 66 of the arms. Consequently, a tapered spreader69 positioned between the dipper stick sides 24 can ass between the spring arms and force t em apart. In this way, as the dipper stick reaches its most extended position the connection between the sides of the stick at the rear ends thereof is released. The purpose of this is to permit the operating cable 34.- to pass from between the sides of the dipper stick. This is of course necessary, as in its extended position (indicated in dotted out line in Fig. 1), the end of the dipper stick is cmn 'iletely within the cannon.

Having thus described my invention, I claim as new, and desire to secure by Letters Patent:

l. in a dipper dredge, a boom, a cannon pivotzdly mounted upon said boom at one end of said cannon, a dipper stick movable relatively to said cannon. a dipper carried by "aid stick. and means at the end of said rannon remote from its pivotal connection nith said boom, for clamping said stick in nor one of a plurality of positions relative to aid cannon.

l. in a dipper dredge, a boom, a hollow cannon pivotally connected at its upper end with said boom, a dipper stick slidable in said cannon and freely movable through said cannon within the limits of the length of said stick and said cannon, and means at. the lower end of said cannon for securing said stick relative to said cannon.

3. In a dipper dredge, non pivotally mounted at its upper end upon said boom, a dipper stick slidably mounted within said cannon and comprising spaced sides having therebetween at the upper end a stop, a stop within the lower end of said cannon and received between said sides, and means carried by said cannon adjacent to its stop, for locking said stick in any one of a plurality of positions, said stick having associated therewith a dipper.

4. In a dipper dredge, a boom, a cannon carried by said boom, a dipper stick slidable within said cannon, saidstick having spaced sides, a dipper carried by said stick, an operating cable for controlling said dipper. said operating cable passing between said sides, and a releasable spring lock for holding together the sides of said stick, said Copies of this patent may be obtained for five a boom, a hollow can look being released by the engagement thereof with the end of said cannon.

5. In a dipper dredge, a boom, a cannon carried by said boom, a dipper stick slidable sides. and a spring lock for holding together the sides of said dipper stick at the rear end thereof, said lock consisting of pairs of releasably and pivotally connected spring arms adapted to be disengaged by the engagement thereof with said cannon, said cannon having therein a s n-raider for separating said arms after the same have been disengaged by the engagement thereof with said cannon.

In testimony whereof I have signed my 5 name to this spccificatnni in the presence of two subscribing witnesses.

ERNEST KR E HER.

Witnesses i. (l. VHHAKER, A. G. TURNER.

cents each, by addressing the Commissioner of Patents.

Washington, D. G.

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