US655522A - Crane. - Google Patents

Description

No. 655,522'l Patented Aun. '7, |900.

.1. w. sEAvEn a s. T. wELLMAN.

G R A N E.

(Application flied July 21, 1898.)

3 Sheets--Sheet I.

(No mmm.)Y

No. 655,522. Patented Aug. 7, :900. .1. w. sEAvl-:R @L s. T.` wELLMAN.

C R A N E.

(Application iled July 21, 1898.)

3 Sheets-Shut 2l (No Modal.)

No. 655,522. Patented Aug. 7, |900. J. W. SEAVER & S;- T. WELLMAN.

' C R A N E (Application lad July 21, 1898.)

3 Sheets-Sheet 3,

(No Medel.)

Uivrrnn 'STATnr ArnNT netos?.

JOHN W. SEAVER AND SAMUEL T. VELLMAN, OF CLEVELAND, OHIO, ASSIGNORS TO THE lVELLMAN-SEAVER ENGINEERING COMPANY,

OF SAME PLACE.

CRANE.

SPECIFICATON forming part of Letters Patent No. 655,522, dated August 7, 1900.

Application filed July 2l, 1898. Serial No'. 686,522. (No model.)

To all whom t muy concern:

Be it known that we, JOHN W. SEAVER and SAMUEL T. WELLMAN, citizens of the United States, and residents of Cleveland, Ohio, have invented certain Improvements in Cranes, of which the following is a specification.

Our invention consists of a crane intended especiallyfor use on piers or wharves,althougl1 applicable for other purposes where a crane having a projecting boom is required, the ob-V ject of our invention being Vto so construct the crane that itwill be of simple construction, quick act-ing, of large capacity, and willhave a wide range of action both on the pier and on a vessel docked alongside said pier.

In the accompanying drawings, Figure l is a side view of a crane constructed in accordance with our invention and showing the boom drawn in. Fig. 2 is a similar view of the crane, showing the boom run out. Fig. 3 is an end view of the crane. Figs. Il and 5 are side views of modiied forms of crane embodying the invention, and Fig. 6 is an end view of the crane shown in Fig. 5.

Fitting-out piers, such as form part of a modern shi p-yard plant, are usually equipped either with stationary shears or with derricks having revolving j ibs; but both of these structures have a limited range of action and are attended with more or less inconvenience in operation, and the floating derricks which are sometimes used are also troublesome, besides being expensive. The crane which we have devised covers a large iield of action upon the wharf or pier and may, if desired, cover the entire area of the same, and it enables a load to be quickly and accurately placed in anydesired position on board a ship or other craft which may be lying at the wharf or aords equal facility for the transfer of loads from the craft to the wharf.

The invention consists of a traveling crane or gantry composed of a girder l, supported at each end by a frame or legs 2 and carrying a sliding boom 3. The girder 1 is preferably composed of opposite channel bars or beams, which may be suitably connected or braced at the rear ends, but provide a free space between the front ends for the passage of the hoisting rope or chain, and the boom 3 may consist of opposite beams or bars connected at each end and provided with one or more trolleys 4, each having suitable hoisting mechanism. The end frames or legs 2 of the crane are mounted upon trucks which have wheels running upon railson the wharf or pier, and the crane may be caused to travel up and down said wharf by means of powerdriven mechanism of an y available character. The sliding boom is provided with suitable 6o roller-bearings on the crane-girder, so thatit can be run out beyond the edge of the wharf for as much of its length as desired, a suiilcient part of the length of the boo-m being always retained in board to steady and hold it.

In the construction shownin Figs. 1, 2, and 3 the boom runs upon rollers 5 at the front end of the girder l and carries at its inner end rollers 6 and 7, running, respectively,

upon the upper andlowerlianges of the beams 7o Y constituting said girder, so as to prevent tipping or tilting of the boom when the same is run out.

Mechanism of any desired character having as its motive power electricity, air, water, or steam may be used for imparting movement to the boom 3, and like mechanism may be used for traversing the trolleys 4 on the boom or for operating the hoisting mechanism of said trolleys, these details forming no 8o essential part of our present invention and being modified to suit the requirements of any particular case.

The end frames or legs, whichsupport the girder l, are so arranged that the boom 3,with its trolleys and load, can pass between said legs, and for this purpose the legs may be strengthened or braced over the top of the girder l, as shown at S in Fig. 3, and spread at their lower ends to such an extent as to 9o afford a proper base for the crane. At or near the bottom the legs may also befconnected together by means of a tiebeam-suoh, for instance, as shown at 9 inyFig. S-or the strength and construction of the legs maybe such that they will maintain themselves properly without the use of this lower tie-v beam so that the load will not have to be lifted over the same as the boom is run in or out.

We prefer to use on the boom 3 two trol- Ioo leys, the outer one being designed for light loads and the innerl one for'heavy loads, and the heavy trolley, with or Without a load, may, if desired, be used as a counterweight for the boom by running it into or toward the inner end of the same Whenthe other trolleyvis run ont to or toward the outer end of the boom; or, in order to counterweight and prevent tipping of the main crane structure When the boom is extended and carries a load at the outboard end, the inner trolley may, as shown by dotted lines in Fig. 2, be run onto a shelf or platform 10, secured to the inner frame or., legs 2, weight being suspended from the trolley or the Weight being otherwise applied to the inner frame or legs, as desired. In place of a moving trolley or trolleys the boornmay have one or'more sets of stationary lifting-- gear, asdesired, the movable trolleys being,

however, alwayspreferred. i

It vWill ybe evident ythat With Aa crane -con-` structed in accordance .with our inventiona load can be lifted'from anyplace on the'wharf Within the `field `of the crane, and the-crane; can then be traversed along thewvhaif untily it reaches a position directly abreast that@ point on the ship vat which it is desired toi place the load, whereupon theboom 3 can be@ run out over the ship and the trolley moved along on the boom until the load is in the eX- act position in which it is desired toplace it,; the load being vvhandled Without obstruction by the masts of the ship or other obstacles;

and the crane readily-accommodating itself to the exigencies of any service which may bei` required.

In the modified form of crane shown in Fig.

4 brackets 1l on the'girder l carry rollers 12 for bearing upon the top of the boom andi steadying the same, while in Figs. 5 4and 6;

`which said invention appertains.

Hence,.without limiting ourselves to the dei tails ofv construction which We have shown' and described, We claim and desire to secure by Letters Patent-L 1. A crane consisting of a girder, traveling end frames or legs supporting saidigirderl and laterally braced or connectedabove the same,

`and afsliding boom mounted on said girder, i vsubstantially as specified.

2. A traveling crane havingagirder and a boom mounted so as to yslide thereon, said boom having a pairvof independently-'moving Atrolleys whereby one of 4said vtrolleys may be used as a counterweight-When the Lother is lifting, substantiallyvas speciied 3. A travelingfcrane having agirder with boom mounted thereon so Vas tobe free Lto Vslide,rappair of independently-movable trol; leys for said boom, and a xedshelf or VVplatform on the craneistructure for the :reception 'of the inner trolley, substantiallyas-speciiied.

'In testimony whereof kWe-have ysignedzou-r names to vthis specification in the presenee'oi- .two subscribing witnesses.

JOHN'W- SEAVER. V

SAMUEL T. WELLMAN. Witnesses:

lC. W. CoMsToCK,

JOHN MCGEORGE.

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