US240100A

US240100A - Fbancis davidson

Info

Publication number: US240100A
Authority: US
Publication date: 1881-04-12
Anticipated expiration: 1898-04-12

Description

(NoModel.)

F. DAVIDSON.

Step Bearing for Vertical Shafts.

N0. 240,100. y 'Patented Apr112,1881.

l X" 'X. 4' o.

d w' x2 Q of? ljgfl.

Y I 4Z X @@sf X Figa'. B

'Nrran STATES FATENT Finca.

FRANCIS DAVIDSON, OF CRYSTAL CITY, MISSOURI.

STEP-BEARING FOR VERTICAL SHKAFTS.

SPECIFICATION forming part of Letters Patent No.A 240,100, dated4 April 12, 1881.

Application filed January 22, 1881.

To alt whom it may concern:

Beit known that I, FRANCIS DAVIDSON, of Crystal City, in the county of Jefferson and State of Missouri, have invented a certain new and useful Improvement in Step-Bearings for Vertical Shafts, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this speciication.

My improvement consists in the hereinafter.- described removable bearing intended especially for heavy vertical shafts for various purposes.

In the drawings, Figure l is a side view of the improvement. Fig. 2 is a section at x, Fig. 4. Fig. 3 is a horizontal section at m x', Fig. 2, with plan of parts below the sectionline. Fig. 4. is a horizontal section at x2 x2, Fig. 2, with plan of parts below the section. Fig. 5 is an enlarged detail section of the lower end of the shaft at w x, Fig. 4, showing the bearing-block in position in the central socket of the shaft; and Fig. 6 is a similar section,showing this blockloosenedin the socket.

A is the step casting, made with a socket to receive the lower end of the vertical shaft B, and an oil-chamber, C, closed by a plate, D, held in place by bolts d. The joint \be tween the plate D and the casting is made oil-tight, so that the chamber C may be kept full of oil.

d is a plug fitting in a hole in the plate D, through which hole the oil may be drawn from the chamber C.

The lower end of the shaft B has an axial socket, b, which may be cylindrical for most .of its length, and Whose lower part, b', is flaring or conical, and in this part b' fits tightly the frusto-conioal top e of the hearing-block E. The lower part, e', of the bearing-block may be cylindrical in form, and may be of larger diameter than the conical part e. The bottom of the bearing-block E turns upon the fixed step-block F, which is made angular at its lower part, f', and tit-s snugly in a recess of the step-casting to hold it in place. The upper part, f, of the step-block may be cylindrical, as shown, and of diameter similar to the part e of the step-block, more or less.

The plate or gateD has projections D bear- (No model.)

ing against the outer side of the step-block F, to prevent its outward movement.

The top of the step-block F has an oil channel or groove, c2, to conduct the oil inwardly to the bearing-surfaces between the blocks E and F.

The shaft-socket b in the step-casting Ahas a number of recesses to receive side bearingblock, G, whose inner sides are made to f1t the shaft. The top of the step-casting extends outward in a flange, a, to give bearing for jacks to lift the shaft when removing the hearin g-blocks. The upper ends of the jacks have bearing beneath a flange, b3, surrounding the shaft B.

The cylindrical (upper) portion of the socket b contains a drift-block, H, made to t freely in the socket, the purpose of whichi is to force the bearing-block E downward and loosen it in the socket to allow it Ato drop to the bottom of the chamber C, when the step-block F has been removed through the mouth a', when the gate D has been taken away. The drift-block His forced down for the said purpose by a wedge, I, which extends through a diametric mortise, b2, in the shaft, and which rests in a key-seat, h, of the block. To limit the descent of the drift-block H the block has a diametric hole, h', through which is passed a bar, J, extending through the mortise b2. Thus the bar J sustains the drift-block H in the absence of the block E and when in its lower position, as seen in Fig. 6.

j"2 is a hole for the insertion of the claw of a pull-rod, by which the block F is drawn ont of the chamber C.

Iprefer to forni the lower end of the driftblock H with a diametric rib, h2, which enters a groove in the top of t-he bearing-block E, so as to hold them in their relative positions. By means of this connection and a key, I, the block E might be prevented from turning in the conical socket b' when not lit-ted in tightly.

It will be observed that by simply removing the pressure ofthe shaft from the step-block Fit can be taken out, and that the bearingblock E can then be forced out of its socket and drawn out ofthe oil-chamber. These blocks can then be readily lined'up and returned and the jacks removed from between the lianges c IOO and b3, allowing the shaft; to descend upon the 2. The combination, with a vertical shaft, 1o blocks. of the removable step-bearing blocks and the I claim as my inventionstep-casting containing oil-chamber G, closed 1. The drift-block H and key I, in combnaby removable gate D, substantially as set forth. 5 tion with the bearing-block E and shaft B,

formed with socket b and mortse b2, the said FRANCIS DAVIDSON' block being located in the seid socket b, and Witnesses: the said key extending through the said mor- SAML. KNIGHT,

t-ise, as set forth. GEO. H. KNIGHT.