US1296756A

US1296756A - Lifting-beam for cranes.

Info

Publication number: US1296756A
Application number: US24599618A
Authority: US
Inventors: Sydney Buckley
Original assignee: Niles Bement Pond Co
Current assignee: Niles Bement Pond Co
Priority date: 1918-07-22
Filing date: 1918-07-22
Publication date: 1919-03-11
Anticipated expiration: 1936-03-11

Description

V Y I s. BUCK-LEY." LIFHNG BEAM FOR CRANES. APPLICATION rlLzn'luLy zz. ms.

Patented Mar. 11,1919.

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ED STATES PATENT OFFICE.

SYDNEY NU' CKLEY, OF PHILADELPHIA, IPENNSYIIZFVANIA, ASSIGNOB, TO NILES-BEM ENT- POND COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

LIFTING-IBEAM FOR CRANES.

Specification of Letters ratent'.

I To all whom it may concern:

Be it known that I, SYDNEY BUGKLEY, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsy1vama,-have invented certain new and useful Improvements in =Lifting-Beams for Cranes, of which the following is a specification.

This invention relates to a lifting beam which is adapted to be used in connection with two companion traveling cranes to enable them to cooperate with each other for the lifting of a sin le unitary load. I am aware that lifting cams have been heretofore used in connection with two companion cranes, but by my invention I secure certain' important advantages which are not attainable by lifting beams as hertofore constructed. The principal object of the invention is to provide a lifting beam and parts associated therewith whereby the beam may 'be supported at a position considerably above the ordinary crane hooks.

In the accompanying drawing I have shown the embodiment which I now deem preferable, but it will be understood that various changes may bemadewithout departing from the splrit of the invention as set forth in the claims appended to this specification.

Of the drawing: I Figure 1 is a side view,of a traveling crane, the lifting beam to which my invention particularly relates being shown in transverse section along the line 1--1 of Fi 2. I

l fi'g. 2 is a sectional view taken along the V -line 2420f Fig. 1.

' Fig. 3 is a detail vievs of one of the sheave blocks.

Referring to the drawing, it will be seen that I have'shown two traveling cranes A and B mounted to travel on the same rails C, C forming parts of suitable runways. The rails C, C are supported on the walls D, D of the inclosing building, the walls in the present instance being indicated as formed of concrete. The roof of the building is suitably supported, as for instance by means of trusses E. Far the sake of economy of construction the roof trusses are placed as low as ossible, onlya small workmg clearance bemg allowed between them and the top parts'of the cranes.

The two. cranes A and B are indicated as being identical in construction, and this is preferable, but it will be understood that so far as the present invention is concerned the cranes A and B may be somewhat different. As shown, each of the cranes comprises longitudinal girders 1, 1 which are spaced apart but which are connected together at their ends by cross elements 2. Each girder at each end is mounted on a truck 3, each truck having two wheels 4,11 engaging the corresponding track rail 6. For moving the crane bodily along the rails C, O there is provided an electric motor 5 connected with the wheels 4, 4 by means of a shaft 6 and by means of suitable gearing not sh wn in detail. The motor 5 is controlled by suitable mechanism located in an operators cage 7.

Extending longitudinally along the tops of the girders 1, 1 are rails 8, 8 which are engaged by the wheels 9 of a trolley 10. This trolley can be of any usual or preferred construction and need not be described in detail. It is sufficient to say that it includes an electric motor connected with thewhcels Q-fOrmOVing the trolley along the rails 8, 8, and that it includes awinding drum 11 driven by another electric motor. Both motors of the trolley are controllable from the cage 7.

Wound upon the drum 11 are cables 12 which pass around sheaves 13 in a bottom block 14. The bottom block 14 is provided with a lifting hook 15 which is ordinarily used for the attachment of the loads to be lifted by the crane.

1-6 represents as a whole a lifting beam which is adapted to be supported at its ends by the two

bottom blocks

14, 14 and which has means near is center for the attachment .end thereof. The transverse members 18,

Patented Mar. 11-, 1919.

18 are suitably made up of plates and structure elements. Block receiving recesses are formed bythe said side and transverse elements.

I provide means whereby the beam can be supported on the bottom blocks 14, 14: at a position above the hooks 15, 15, such sap ort being preferably effected entirely 1n- .3 dependently of the hooks. WVhen the beam' is constructed .s described the blocks are positioned in the said recesses at the ends.

' As shown in Fig. 3, each bottom block 14 comprises a pin 19 upon which the sheaves 13 are rotatably mounted. Use is preferably made of the pins 19, 19 of the two blocks for connecting the blocks with the lifting beam. By preference the pins are hollow and

steel pins

20, 20 are provided which are adapted 15 to be inserted in the apertures of the sheave pins 19, 19. The

transverse end members

18, 18 of the lifting beam are provided with apertures also adapted to receive the pins 20, 2t). \Vhen the lifting beam is to be used,

20 the sheave blocks lll'e inserted in the recess at the ends of the beam in the positions indicated, and the

steel pins

20, 20 are inserted through the apertures in the transverse members 18, 1S and through the central apertures in sheave pins 19, 19. In this way the lifting beam is securely connected with the lifting blocks to be supported thereby and is positioned considerably above the hooks 15, 15.

As shown, the lifting beam has at or near its center a suitable eye 21 which is pivotally supported on

transverse members

22, 22 extending from side to side of the beam. This eye. 21 is adapted to be used for the attachment of the load to be lifted.

It willbe seen thatv with the arrangement shown a. suitable load can be attached to the eye 21 and that the combined lifting power of the two cranes can be utilized for lifting this load. A

. According to prior practice, lifting beams have been suspended from the usual crane hooks, such as 15,'15. On account of this suspended position of the lifting beam one or the other of two conditions resulted. Either it was impossible to lift the load as high as was sometimes desirable, or it was necessary in order to secure the desired lift to build the crane runways, and in fact the lfilwhole building, several feet higher than would bth erivise have been necessary. By my improved-construction I secure the necessary lift and at the same time avoid additional height for the crane runways and for the building, it being possible with a lifting beam constructed and supported as shown to lift the load as high as a load could be lifted by means of one of the usual hooks 15, 15.

\Vhat I claim is:

1. The combination of a lifting beam, means near the center of the beam forthe attachment of a load, and means, at the ends of the beam for supporting the beam on crane bottom blocks independently of the hooks thereof.

2. The combination of a lifting beam, means near the center of the beam for the attachment of a load, and means at the ends of the beam for supporting the beam on crane bottom blocks above the hooks thereof.

3. The combination of a lifting beam, means near the center of the beam for the attaclnnent of a load, and means at the ends of the beam for supporting the beam on the sheave pins of crane bottom blocks.

4. The combination of a lifting beam, means near the center of the beam for the attachment of a load, and supporting means at the ends of the beam comprising apertured spaced elements on the beam and pins adapted to be inserted in the apertures and in central apertures in the sheave pins of crane bottom blocks.

5. A lifting beam for cranes having means near the center for the attachment of a load and comprising two spaced side elements adapted to receive the crane bottom blocks between them at their ends.

6. The combination of a lifting beam for cranes having means near the center for the attachment of a load and comprising two spaced side elements adapted to receive the crane bottom blocks between them at their ends, and means for supporting the beam on the said blocks.

7. The combination of a lifting beam for cranes having means near the center for the attachment of a load and comprising two spaced side elements adapted to receive the crane bottom blocksbetween them at their ends, and means for supporting the beam on the sheave pins on the said blocks-\ 8. The combination of a lifting beam for cranes having means near the center for the attachment of a load and comprising two spaced side elements adapted to receive the' crane bottom blocks between them at their ends, and means for supporting the beam on the said blocks, the said means comprising removable pins extending through central apertures in the sheave pins of the blocks.

9. The combination of a lifting beam for cranes having means.near the center for the attachment of a load and comprising two spaced-side elements and transverse elements forming end recesses adapted to receive the crane bottom blocks, and means for supporting the beam on the said blocks.

10. The combination 'of a lifting beam for cranes having means near the center for the attachment of a load and comprising two spaced side elements and transverse elements a forming end recesses adapted to receive the crane bottom blocks, and means for supporting the beam on file said blocks, the said means comprising removable pins extending through central apertures in the sheave pins of the blocks.

11. The combination of a lifting beam for cranes having means near the center for the attachment of a load and comprising two spaced side elements and transverse apertured elements forming end recesses adapted to receive the crane bottom blocks, and means for supporting the beam on the said blocks,

7 the said means comprising removable pins extending through central apertures in the sheave pins of the blocks andthrough the apertures in the transverse elements.

12. The combination of two similar traveling cranes movable along the same runways, a lifting beam, means near the center of the beam for the attachment of a load, and means at the ends of the beam for supporting the beam on the bottom blocks of the cranes above the hooks thereof.

13. The combination of two similar traveling cranes movable along the same runways, a lifting beam having means near the center of the beam for the attachment of a load and comprising two spaced side elements adapted to receive the crane bottom blocks between thein at their ends, and means for supporting the beam on the said blocks.

14. The combination of two similar traveling cranes movable along the same runways, the said cranes having bottom blocks provided with hollow sheave pins, a lifting beam, means near the center of the beam for the attachment of a load, and means at the ends of the beam for supporting the beam on the bottom blocks of the cranes, the said means comprising pins adapted to be inserted in the said sheave pins.

In testimony whereof, I hereto affix my signature.

' SYDNEY BUCKLEY.