US2297043A - Dump scow - Google Patents

Description

DUMP scow Filed No v. e, 1939 2 She ets'-Shee t l I'NVENTOR.

Patented Sept. 29, 1942 DUMP SCOW Fra'nk R. Zimmerman, Duluth,-Minn., assignor to .Superior Iron Works Wis.

Company, Superior,

Application November 6, 1939', Serial No. 303,065

1 Claim.

This invention relates to dump scows, and has special reference to improved means for operating the doors of such scows.

One object of the invention is to provide means whereby less power is required for the operation of the doors of dump scows.

Another object is to so install such mechanism that the least strain and stress will occur in the operating mechanism when applied to the longer and larger type of scows now common in the art.

Other objects and advantages of the invention will appear in the following description thereof.

Referring now to the accompanying drawings, forming part of this application, and wherein like reference characters indicate like parts:

Figure 1 is a broken top plan view of a modern type of dump scow.

Figure 2 is a somewhat enlarged cross sectional view through one of the pockets of the scow illustrated in Figure 1.

Figure 3 is an enlarged transverse section through one of the pockets, illustrating in detail the door operating mechanism.

Figure 4 is an enlarged side elevation of the power transmitting means for operation of the doors of a hopper.

Figure 5 is an end elevation of a common split compression coupling,

Figure 6 is a side elevation of a common flanged coupling.

I am aware that somewhat similar mechanism is old in the art, and wherein power is transmitted from the hold of the scow to a pair of horizontally disposed shafts extending fore and aft of the scow and journalled upon the side of the coaming of the hoppers of the scow. In such structure it has also been the custom to install the power unit at one end of the scow and apply the rocking motion to the transmission shaft above the deck thereof from one end only, and this has resulted in many unsatisfactory experiences on account of the extreme length of such a shaft, in that it is common to all of the hoppers of the scow. In my improved assembly such difficulty is reduced to a minimum as I have installed the power unit substantially midships of the scow with the power shaft I being formed of two independent sections of shaft, and the motor or engine as the case may be, illustrated at 2, being installed within the hold of the scow directly beneath the abutting ends of the shaft I. With this assembly it is man as at 3 extending from the power unit upwardly to each of the parts of the shaft 1 and directly connected thereto as by the customary crank arm 4, thus to provide the necessary rockable motion of both parts of the shaft I when power is being transmitted therethrough.

The usual manually controlled transmission for the oppostie ends of each individual hopper is clearly illustrated in the drawings, it embodying the short, like sections of countershaft as illustrated at 5, installed above the power shaft I, and each short section of shaft 5 is operated by the application of its respective reciprocable hand lever 6 being selectively engaged with the ratchet wheel 1 keyed to each section of shaft 5 for rotating same when desired. Each shaft section 5 carries a winding drum 8 fixed thereto adjacent the bulkheads 9 at each end of each hopper, this being as is usual for the proper operation of the hoisting line [0 at each end of each hopper for raising or lowering the doors thereof, said doors being illustrated at II in the drawings.

The instant invention is further novel at this point of installation in carrying out one of the principal objects of the invention, to wit: that of lessening the actual power required in operating the line l2, which is directly connected to the doors ll after passing over the usual carrying sheave I3 mounted upon the inner wall of the bulkhead 9 of each hopper. For this purpose a second hoisting line is indicated at 10, leading from the drum 8 to and about the sheave M, which is attached to the otherwise free end of the hoisting line I2, and to the anchorage or attachment IS on the lower portion of the coaming I6 of each pocket.

In this manner it is obvious that the power applied from the shaft 5 is augmented in its application to the hoisting line l2 and greatly reduces the stress upon the entire power transmitting mechanism, though requiring slightly longer time to accomplish the desired result.

It is to be noted that the power unit 2 contemplates the employment of two engines or motors I! for driving the shaft to which the pitmans 3 are connected so that in the event something might happen to one of the motors the other could still be used in the proper functioning of the mechanism.

A a further caution against unforseen accidents, the abutting ends of the two alined parts of the shaft l are shown as splined for the reception of any desired form of split compression obvious that there must be a reciprocable pit- 5 coupling such as shown in Figure 5 in order to cause the two sections to act as a single shaft. However in such an event there still remains the advantage of driving same from intermediate of its ends.

In lieu of the split coupling referred to, the two abutting ends of the shaft I may each be provided with a common flanged coupling member as shown in Figure 6 and wherein obviously only the application or removal of the through bolts 18 will suffice to either unite or separate the portions of the shaft.

Having thus described my invention, what I claim and desired to secure by Letters Patent, is:

Door operating means for a dump scow having a plurality of hoppers therein surrounded by an upstanding coaming and a pair of hinged doors at the bottom of each hopper, comprising door operating means for the doors of each hopper, mounted upon one side of said coaming, two axially alined power transmitting shafts, disposed beneath said door operating means longitudinally of said scow and adjacent said coaming', means below each of said door operating means, carried by said alined shafts, for selective transmission of power therefrom to said door operating means, and a power unit within said scow below the meeting ends of said shafts, and individual means connecting the meeting ends of each shaft with said power unit for imparting uniform rockable 15 motion simultaneously to both shafts.

FRANK R. ZIMMERMAN.

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