US119901A - Improvement in dredging-machines - Google Patents

Description

l 2 SheetsQ-SheeLZ. [5.12 /1 EL l). //INDL'c/JR Patented Oct. 10,1871,

1 (fa/L UNITED STATES:

PATENT OFFICE.

ISRAEL D. VANDEUAR, oE enioAGo, ILLINOIS.

IMPovEMENT 1N DREoelNc-MACHINES.'

i* Specification forming part of Letters Patent No. 1-19,901, dated October l0, 1 1571.

To all u-hom it may concern;

Be it known that I, ISRAEL D. VAnDEoAR, of

Chicago, inthe county of Cook and State of Illinois, have invented a new and useful Improvement in Dredging-Machines, of which the follow- .ing is a specificatiom' My invention relates to that class of dredgingmachines which have hinged or pivoted scoops' that are opened and-closed by a series of jointed levers and chains or ropes; and it consists, tirst,

in the special mechanism, hereinafter described,

.by which the said scoops are pivoted; and second, in the special construction and arrangement 4 Fig. 2 represents the same closed in the position it assumes when filled. Fig.'3 represents aside view of the machine in the same closed position. Fig. 4 represents 'an enlarged view of the sliding block and hoisting-hooks, with one -of the side plates of said block removed.

` A in the drawing represents the hinged scoops; B, the bails of said scoops, with bent arms V(l at,- tached thereto. Dis a cross-shaft, to which saidl bails are pivoted, as shown; and E, a vertical rod, Aattached rigidly to said shaft. F F are jointed connecting-rods, connecting the outer ends of the arm Gwith the sliding head H. I is a sliding block, and J Jarc hooks pivoted to said sliding block, Jas shown. K is a pulley, hung on bearings within said block. L L are connectinglinks or rods, attached loosely to pins M M on .opposite sides of the pulley K and to the arms of the hooks J J, as shown. N isa cord, which passes in the groove'of the pulley K and is attached to said pulley, as is shown by dotted lines in Fig. 4. vO is a hoisting-chain, attached to the sliding block Iby one strand thereof, being at tached or hooked to said block atI and the other two strandsby passing around al pulley, Q, in saicf block. R R are chains,

, block I to the. back. part of the scoops A. S S

attaching the sliding are rubberbloc'ks, attached to the scoops A where 'leverv in the application of the p the hails B will strike againsttheni,and thereby prevent a noise and jar, and injury to the machine when opened, as hereafterdescribed. 'l is also a rubber block, placed on the rod E for the sliding headH to strike'againstwhcn the ma. chine isopened. U U are braces, rigidly attached to the back part of the scoops A and pivote-d to the shaft D. 4

The operation of my machine is as follows: Fig. l represents the machine lowered to the bottom of the river or lake -to be dredged, so that the scoops'rest in the position shown in Fig. I on said bottom. The hoisting power being applied to the fchain O, by means of tackle applied to a derrick or other well-known mechanism suitable for that purpose, it is communicated through the hoks J J ,which are hooked to the head of the sliding head H and the jointed connecting-rods F, to the arms C ofthe bails B.' These hails, be-

ing pivoted to thesliaft l), serve as'levers to force the scoops together, and at the same'tinie cause 1 them to scoop themselves full of the-earth or Inavterial upon which they rest, the machine assuming the position in all its parts shown in .Fig.2, when, by continuation of the application of power, the machine is raised and swung around to the place where it is desired to deposit the contents l of the scoops. By pulling the cordNthe pulley K is revolved, and, through the connecting-links L, the hooks J are vibrated al'id released from the sliding head H, when the weight of the machine is taken by the chains 1t 'instead of being supported through the head H and bails of the scoops '-and their connections, and the scoops opened, as

shown in Fig. l, discharging their contents, the sliding head 'H falling down upon the rubber block T; but the block I remaining elevated. The machine is then swung back and loweredfora second load, and the block I lowered so as to slide down on the rod E till tire hooks J engageon the sliding head H, when the machine is ready for theremoval of al second load, as above described.

The braces U brace the back part of the scoops and keep them from being thrown out of' shape. By means of the bails B and-arms C, and the shaft D, the power for closingthe scoops is applied at each end of them, the b serving as a bent arm C'extending outward','fas shown, the scoops are held pressed together until the hooks J are released from the sliding head H, as above vandby the described. The draft-chain O passes from the drum of any hoisting apparatus over the hook shown at the top of Figs. 1A and 2, which hook maybe regarded as suspended from the boom of' a vessel; from thence it passes downward around the pulley Q, and then up over the said hook; and from thence down again to theslidng block l, to which it is attached at P. In practical operation a pulley-block and sheaves are substi tutcd for the said hook to prevent too great friction, and to incrcase'the draft power. As the free end of the draft-chain is wound around the d'rmn of, a hoistingl apparatus the dredging-machine. is raiscd,and as it is unwound it is lowered. 'lhe purpose and operation of the pulley Q is thus made clear.

Having described thel construction and operation of my dredginganachine, what I claim and desire to secure by Letters Patent, is-

l. The combination of the scoops'A, bails B,

arms C, shaft D, and braces U, whe'n constructed and arranged substantially as shown and dcscrbed.

2. In combination with the vscoops'A, bails B, arms G, and shaft D, the jointed connecting-rods F F and slidinghead H, substantially as described.

3.' 1n combination with the scoops A, bails B, arms C, and shaft D, the rubber blocks S and'T, as and for the purpose shown and described.

4. The combination of the pulley K, connectng-linksL, hooks J ,sliding block I, and cord N, constructed and arranged as and for the purposes set forth.

5. The combination of the sliding block I, the pulley Q, and chain O, constructed and arranged as described.

ISRAEL D. VANDEGAR.

Witnesses: F. F. WARNER, HEINR. F. BRUNs.

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