Untitled record

(No Model.)

W. GREB.

Sheets—Sheet 1

ELEVATOR.

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N. PETERS. Photo-Lithographer, Washington. D. C.

(No Model.) 2 Sheets—Sheet 2.

W. GREB.

ELEVATOR.

No. 355,162. Patented Deo. 28, 1886.

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WITNESSES

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INVENTOR

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N. PETERS. Photo-Lithographer. Washington, D. C.

United States Patent Office.

WILLIAM GREB, OF CHICAGO, ILLINOIS.

ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 355,162, dated December 28,1886.

Application fiied October 30,1885, Serial No. 181,407. (No model.)

To all whom it may concern:

Be it known that I, William Greb, a citizen of Prussia, residing- at Chicago, in the county of Cook and State of Illinois, have in5 vented certain new and useful Improvements in Elevators, which are fully set forth in the following specification, reference being had to the accompanying drawings, forming a part hereof, and in which— ro Figure 1 shows an end elevation of an elevator constructed according to my design, with lazy-tongs at one end shown inside elevation, partly compressed in full lines, and partly raised in dotted outlines, in which the parts ee 15 rest on a fixed support,«, and the central pi ns through the bars move in a vertical·slot.

Fig. 2 shows a like series of lazy-tongs with parts P E and i T,,but in which the point n moves in a vertical slot,and the parts e are at20 tached at about their centers to bracing-levers, Η H, and turn on a fixed pin, x, at their outer ends.

Fig. 3 shows the same construction in its low^rer parts as Fig·. 2, but differs in the arrange25 ment of its upper members, TT, which spread outward and are held in fixed points, x, from the points i', instead of meeting -in one fixed point.

Fig. 4 shows a front view of an elevator with 3c a double series of lazy-tongs, in which the lower and outer members are formed into bellcrank levers, joined by a pin, n, moving in a vertical slot,and to the outer end of the bellcrank lever, in 0, are attached the braces Τ', 35 hinged in fixed points The upper braces,T, turn in fixed parts, x, of P, and the parts a, r, and i are the reversed parts of d, n, and g.

Fig. 5 is a modification of Fig. 4, in which the centers of the lazy-tongs are joined by bars, 40 q, to hold them in fixed positions, thereby dispensing with one-half of the lazy-tongs.

l· Fig. 6 shows an end view of Fig. 5.

Fig. 7 shows the lower part of Fig. 2 inverted and suspended from above, and in which 45 the lower members, J',are joined like the members H of Fig. 2 to the first pair of bars of the lazy-tongs, but of which the outer ends are attached to pins moving in horizontal slots in the platform P, and to which pins the bars J 50 are joined to pins B, moving iu a vertical slot in a post of the platform P, and the bars are united, by suitable nuts and bearings, with a screw 8.

Fig. 8 is an end view of Fig. 7.

Fig. 9 is another form of suspended elevator, 55 in which the inner ends of the bars T are above instead of below the points of suspension, and in which the members d are similar and operate like the members d and Τ' in Fig. 4, but in which the pins 0,uniting the outer ends of 60 the lower members, are elongated and passed through horizontal slots in the platform P. The upper and lower parts of the lower pair of lazy-tongs are united by a screw, S. The bars or braces T are also provided with ad- 65 j ustable weights y.

Fig. 10 shows the parts of Fig. 3 inverted to the pins i, to which pins 0 of Fig. 3 correspond, and the bars T are attached. The lower ends of the lower bars, J,are united to a mova- 70 ble bar, B, into which the screw S works, the bar moving vertically in the vertical post attached to the platform, the upper end of the screw being fixed in the platform P. As the screw draws up or down the part B,it operates 75 on thepointso, and through them, and through r,on the levers a, opening or closing them,and said motion is aided by the levers T, fixed in the points i, in the parts d. A rod, Q, prevents the supporting walls from spreading,and 80 rods v hold opposite bars T together.

Fig. 11 is a view at right angles to that of Fig. 10 of the same, the lower part of the walls being removed. Fig. 12 is a plan view of the top of Fig. 10. Fig. 13 is a plan view of Fig. 85 10 below the plane a' V.

The object of my invention is to adopt the well-known form of lazy-tongs, as shown in Fig. 1, at a b c d e, to the raising of weights. This end is attained-by attaching to the series 90 of levers, either at their upper or lower or at both ends, levers or bars in such a manner as to exert a constant force in such direction, as shown in Figs. 4 to 13, inclusive, and which tendency may be advantageously used by the 95 employment of extraneous mechanical power, preferably a screw, as shown in all the figures from 4 to 13, inclusive.