US423851A - Hydraulic device for elevating ladders - Google Patents

Description

(No Model.) 7' 2Sh'eets-Sheet 1.

0. WINTER.

HYDRAULIC DEVICE FOR ELEVATING LADDERS.

Patented Mar. 18, 1890.

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No. 423,851. Patented Mar. 18, 1890.

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CARL WINTER, OF CHICAGO, ILLINOIS.

HYDRAULIC DEVICE FOR ELEVATING LADDERS.

SPECIFICATION forming part of Letters Patent No. 423,851, dated March 18, 1890.

Application filed August 19, 1889.

To all whom, it may concern:

Be it known that I, CARL WVINTER, a subj ect of the Emperor of Germany, residing at Chicago, in the county of Cook and State of Illinois, have invented a new, useful, and Improved Hydraulic Device for Elevating Ladders and Stand-Pipes, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification, in which Figure 1 is a plan view of a truck and fireescape ladder,showin g my improved hydraulic device for elevating said ladder. Fig. 2 is a side View of the same, partly in section, taken upon the line X, Fig. 1. Fig. 3 is a central longitudinal vertical sectional view in detail of the hydraulic apparatus; and Fig. 4 is a plan view of a modification of said device, showing the same applied to a stand-pipe.-

Like letters of reference in the different figures indicate like parts.

The object of my invention is to provide a simple and effective motor or device for elevatingfiremens ladders and stand-pipes, and for analogous purposes wherein a portable motor is requirechwhich may be simple, powerful, and easily manipulated.

To these ends my invention consists in the combination of elements hereinafter more par= ticularly described, and definitelypointed out in the claim.

Referring to the drawings, A represents a truck, upon which is pivotally mounted,preferably at the forward end, a frame B, resting by means of a fifthnvheel 0, Figs. 2 and 3, upon a plate 19*, adjusted in the usual way, forming the center of oscillation. Extending upwardly from the frame 13 and rigidly secured thereto are bracket-s C C, in which is journaled a cross bar c, to which is attached a ladder D or other structure intended to be moved in the arc of a circle, the attachment being near the lower end of the ladder.

Mounted upon the frame .B and rigidly attached thereto is a hydraulic cylinder E, provided with the usual piston e and pistonrod 6, passing through a bore eiwhich forms a guide therefor and enables the piston to work accurately in the cylinder. The cylinder E is provided with induction and eduction ports, at which are located valves F F, for

Serial No. 821,217. (No model.)

regulating the fiow of liquid to the cylinder. A pipe f serves to connect the induction-port with a pump G, Figs. 1 and 4, said pump be 'ing in turn connected by means of a pipe 7L either with a portable reservoir H, mounted upon the truck and normally filled with water, oil, or other liquid, or by a hydrant II, as indicated in the dotted lines in Fig. 1. A waste-pipe f is also connected with the induction-port. Bent arms J (better shown in Fig. 2) are attached to the lower end of the ladder, to the lower extremities of which are loosely attached pitman-rods 7a 7a, the opposite ends of which are secured to a cross-bar e attached to the piston-rod.

Upon the axle c is attached a ratchet 0, adapted to be engaged by a pawl 0 for the purpose of preventing the fall of the ladder in the event of the breakage or failure to act of other parts.

In Fig. 4 I have shown my improved elevating device applied in a similar manner to a stand-pipe D. In such a case I prefer to make the axle c hollow, as indicated in dot-' ted lines, so that the water-supplypipe L may communicate directly therewith, and the water may be permitted to flow through it at any elevation of the stand-pipe.

The operation of my improved elevating device is as follows: Assuming the ladder or stand-pipe to be in a normal position, the valve f is opened and the valve f closed, as shown in Fig. 1. Upon operating the pump the liquid is forced into the cylinder E, the piston e pushed back, when the links 7.: 7c drawing upon the lever-arms F tilts the ladder or other structure upon its axis and elevates it to the desired position. The frame B may then be turned upon its vertical axis for the purpose of adjusting the ladder with reference to the building against which it is to be placed.

The lowering of the ladder may be accomplished by opening the valve f and permitting the water to flow out more or less, according to the extent to which it is desired to have the ladder descend.

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

The combination, with a vehicle, of the circular rotary frame B, centrally pivoted, braces C G, ladder D, tllllllllOllGd thereto, hydraulic In testimony whereof I have signed this cylinder, bracket J, a pitnmn connecting the specificationfln the presence of two subscrib- IO same to said hydraulic cylinder, reservoir H, ing witnesses, this 10th day of August, 1888. mounted upon the vehicle, pump G, in oper- T 5 ative connection therewith and with said cyl- CARL D inder, an eduction-pipe, and valves f f, all Witnesses: combined andarranged substantiallyas shown D. II. FLETCHER, and described. J. IIALPENNY.

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