US390341A - Sheave-block for hoisting and conveying machines - Google Patents

Description

(No Model.)

A. E. BROWN.

SHEAVB BLOCK FOR HOISTING AND CONVEYING MACHINES.

No. 390,341. Patented Oct. 2, 1888.

Ina en in 2-, fizax Efirowru N PEYEHa F'nelcillhugnphcr, Washington, D. C.

UNITED STATES ALEXANDER E. B ()\VN, OF CLEVELAND, ()IIIO.

SHEAVE-BLOCK FOR HOISTING AND CONVEYING MACHINES;

SPECIFICATION fonning part of Letters Application filed March In, 1857.

To all whom it may concern.-

Be it known that I, ALEXANDER It. BROWN. of Cleveland, in the county of Cuyahoga and State of Ohio, have invented anew and useful Improvement in sheave-Blocks for Hoisting and Conveying and other Machines; and I do hereby declare that the following is a full, clear, and exact description'thercof, reference beinghad to the accompanyingdrawings, making part of this application.

Myinvention relates more especially to that kind of hoisting and conveying machines in which the sheave-block (from which the load is suspended) has its sheave or pulley rotated while the block is being conveyed by the trolley or carriage. In such machines the construction of the sheave-bl0ck has heretofore been such that the laterally-projecting ends of the sheave-axle have come into direct contact with the block-sustaining hooks or supporting devices of the trolley, and in such machines of course more or less friction between and Wear of both the hooks and the ends of the sheave axle have resulted from the turning of the axle ends in the sustaining hooks or devices ofthe carriage. I propose by my invention to entirely remedy this defect or objectionable fcature of machines made as heretofore, and at the same time otherwise improve the construction of machines of the species referred to; and to these main ends and object my invention may be said to consist, primarily, in forming or providing the plates or cheek-pieces of the sheave-block with exteriorly-projecting hubs, which not only contain bearing-boxes for the ends of the sheaveaxle which directly and wholly surround said sheave-axle ends, but also serve as the devices to engage with the block-supporting hooks of the carriage or trolley in lieu of the end of the sheave-axle, as heretofore, all as will be hereinafter more fully described; and my invention consists, secondarily, in a novel structure of the hub-like projcctions of the sheave-block with oil-receptacles, all as will be hereinafter more fully explained.

To enable those skilled in the art to which my invention relates to make and use pulleyblocks containing the same, I will now proceed to more fully describe my improvements,

Patent No. 390,341, dated October 2, 18E8 Serial No. 233,121. (No model.)

referring by letters to the accompanying drawings, which form a part of this specification, and in which Ihave shown my invention carried out in that form which is best now known to me, and in which I havcso far successfully practiced it.

In the drawings, Figure l is a perspective view of a sheave device or pulley-block enibracing my invention and of a form such as I have successfully used in hoisting and conveying machines for handling coal, ores, &c. Fig. 2 is a partial axial section of the sheave device, drawn on a larger scale for the purpose of exhibiting more clearly the detailed construction of the journal-boxes and the arrangement of the axle of the wheel. Fig. 3 is a partial axial section on the same scale as Fig. 2, but drawn in a plane such as to show the feed or supply hole for oiling the journal in communication with the ingress-hole of the plug of the hub like device, and in all the figures the same parts will be found designated by the same letters of reference.

A are the cheek-pieces of the block, which in the case shown are made of metal.

B are tubular hnblike devices, which are securely fastened at their roots to the outer open outer ends are threaded interiorly for a short distance inwardly, for a purpose to be presently explained.

F is a sheave or wheel of any of the usual forms, and this wheel is made fast on the axle or spindle E, which projects at either side of the wheel to a suitable extent to form journals of sufficient length to be durable. These projecting ends or journals of the axle Eare fitted to run within brass boxes or bushings d, that are fitted tightly within the hub-like projcc" tions B. These hub-like projections are, however, considcrably longer than the bushings d and the journals which work therein, so as to leave quite a space or receptacle, as shown at J, between the end of the axle E and the open end of the said hnblike projections, which receptacle isdesigned and used for the purposes of an oil-box or oil-reservoir.

The outer end of the tubular device or hub B is closed up by a screw-plug, g, the thread on the periphery of which engages with the faces of the cheek-pieces A, and which at their female thread formed interiorly at the outer end of the hub, and said screw-plug, which is made, as shown, diskshaped, has a small hole, in its peripheral or flange-like portion, which, when turned to coincide with the hole It (drilled near the end of the hub B) will form a free communication with the oil-reservoir J for the purpose of supplying the same through said hole h, as occasion may require. Of course when the plug is turned into the position shown at Fig. 2, the hole It will be closed by the plug to prevent any escape of the contents of the receptacle J.

For the purpose of supporting or holding in place with sufficient rigidity the projecting hub-like devices B, I surround each of said devices with a convex or segmentally-shaped washer-like device,(which, preferably, is made hollow,) as seen at c. This device being securely riveted or otherwise fastened to the cheek-piece A of the contrivance, (and if deemed expedient also secured to the hub B, or it may form a part of it in one piece, as in Fig. 3,) serves effectually to strengthen the organization and lend rigidity to the hubs, within which areformed, as already explained, the bearing-boxes for the journals of the shaft E.

It will be seen that in a pulley-block constructed as shown and described not only are there presented for cooperative action with the supporting hook-like devices of the trolley axially-located stationary projections, so that there is no friction caused by any rotatory movement within the load-supporting hooks of the laterally-projecting devices of the sheaveblock, but, furthermore, by reason-of the elongation of the hubs of the cheek-pieces of the block, so as to constitute the devices to engage with the trolley-hooks, much longer journalboxes are afforded (and consequently longer and more durablejonrnals can be formed on) the sheaveraxle, which is a great desideratum.

By the extension of the hub-like device B, so as to form the oil-receptacles J, I am enabled to provide for a perfect and continuous lubrication of the working or bearing surface, and thus add greatly to the durability of the block as compared with one in which the wheel turns upon the fixed stud, and in which it is therefore quite impracticable to keep the hearing or working-surfaces always thoroughly lubricated. The simple device of the screw-plug g, with its hole t and the oil-hole h in the endof the hub, serves efficiently and conveniently the purpose already explained,

and adds to the perfection of the contrivance as a whole.

Of course, the primary or main feature of my invention may be employed in the construction of pulley-blocks under a variety of modifications of form, and either with or without the secondary or supplemental features of the oil-reservoir, &c. In practicing my invention so far I have, however, found it expedient and desirable to construct the entire device substantially as I have herein shown and described it.

As it is not indispensable to my invention that all the described features be used together, or that as to any one of said features all the parts be made in precisely the forms shown, I wish it to be understood that what I claim as new,irrespective of any precise forms of parts and whether used together or separately, and desire to secure by Letters Patent, is-

1. In a sheave-block adapted for use in conneetion with the load-supporting books of the trolley of a hoisting and conveying machine, the combination, with the hub-like axially located lateral projections which operate as stationary supporting devices for engagement with the hooks of the trolley, of bearings for the inelosed sheave-journals, which completely surround said journals, all substantially as hereinbefore set forth.

2. In a sheave block having its sheave mounted fast on its axle, and having the ends of the axle supported by completely-surrounding bearings located within the hub-like projections of the cheekpieces, the closed tubular extensions of the said hub-like devices beyond the ends of the axles, which tubular extensions operate as oil-reeeptacles, the whole constructed and operating as hcreinbefore set forth.

3. In a sheavebloek having journalboxes formed or arranged within the hub-like extensions B, oil-receptacles with oil-holes h located near the ends thereof, and screw-plugs 9, pro vided with peripherally-arrangedholesi, which may be thrown into and out of register with the oil-holes h, the said devices being all combined and operating together in substantially the manner and for the purposes hereinbefore set forth. I

In witness whereof I have hereunto set my hand this 31st day of August, 1886.

ALEX. E. BROWN.

In presence of- E. T. SOOVILL, O. B. KRAUSE.

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