US1716680A - Marine elevator - Google Patents

Description

H. BARLO W MARINE ELEVATOR Filed Jan. 24, 1927 TTORNEY INVENTOR my, flax/0W June 11, 1929.

Patented June 11, 1929.

UNITED STATES PATENT OFFICE.

HARRY BABLOW, 0F PORTMADISON, WASHINGTON, ASSIGNOR TO HARLOW MARINE ELEVATOR CO. INC., OF SEATTLE, WASHINGTON, A CORPORATION OF WASHING- TON.

MARINE ELEVATOR.

Application filed January 24', 1927, Serial No. 163,289, and in Canada Ianuary 26, 1927.

My invention relates to a marine elevator. More particularly my invention relates to a marine elevator mounted in a well in the dock covered by a bridging section which section may be moved into open position by means of the elevator platform.

The dock deck is often supplied with one or more railroad tracks, and often with a track over which a travelling crane may move to facilitate the transfer of freight to or from the vessels. The installation I of elevators to facilitate the unloading of freight from the decks of the vessel, which decks rise and fall, of course, with the tide, makes it necessary to interrupt the dockdeok with the elevator well. The dock deck section which normally bridges the Well when the elevator is not in operation must-be removed when it is desired to put the elevator into operation. Since these dock deck bridging sections are often very heavy it is desirable to have the same rotatable by means of the elevator itself. A special difficulty obtains in providing elevator mechanism for docks in that the mechanism must be such as to permit the dock being swayed or sprung out of its normal position by contacting the vessel Without interfering with the operation of the elevator. The moving parts must be such as to not become bound or thrown out of alignment to an extent that Will interfere with their operation.

A primary purpose of my invention is to provide a mechanism of the character described which will satisfy all these conditions.

The above general objects of my invention, together with others inherent in the same, are obtained by the device illustrated in the following drawings, the same being preferred exemplary forms of embodiment of my invention throughout which drawings like reference numerals indicate like parts.

Figure 1 represents a view in elevation of an elevator platform and associated bridging section embodying my invention.

Fig. 2 is an enlarged plan view of a detail of the same.

Fig. 3 is an end view of said detail.

In a dock deck 4 an elevator well 5 is provided having a removable bridge section 6 pivotally mounted at 7 which bridge functions to cover the said well. A bridge seat 8 is provided on the side of the well opposite suspended by hoisting cables 10 secured to.

each corner of said platform. Counterweight 11 assists the motor means (not shown) in raising and lowering the elevator platform. Likewise counterweight 12 facilitat-es the rotating of the removable bridge section 6 upon its pivotal mounting 7. A chain 13 is secured toone end of the bridge section 6, and then is reeved through sheave l4 and thence through sheave 15, and made fast to the bridge section 6 at 16. The bridge platform 9 is provided with detachable chain engaging means 17 which consists of a plate having a slawhead opening 18 and a knob handle 19 which plate is slidably mounted under angle clips 20.

A detachable chain engaging means 21 mounted upon the dock adjacent the Well 5, is provided similarin every respect to means 17.

Having the elevator suspended at its four corners (as herein described) permits sufficient freedom for the platform to move up and down in said elevator well and at the same time provides for engaging the chain 13 so that said bridge section 6 may be moved up or down as may be desired by the operating of the platform 9 by causing the chain engaging means 17 carried by the platform 9 to engage the chain as hereinabove described. Jamming of the vessels against the dock at the time of mooring does not interfere with theoperating of the de vice herein described in view of the fact that sufficient clearance is provided for the parts of the elevator platform and the chain 18. The structure is peculiarly adapted to overcome all objections to swaying and displacement of the dock by contacting the vessels at time of mooring.

The mode of operation of the device embodying my invention will appear from description already given, and from the drawin gs. It is manifest that when the elevator platform 9 is moved downwardly with the detachable claw-like chain engaging means l7'engaging the chain 13 with a link 22 of said chain disposed transversely of said opening 18, the said means will pull the section down into closed position so that the one end .section.

portion will rest upon the bridge seat 8. When it is desired to lift the section the raising of the elevator platform 9 will cause the bridging section to swing into open position as shown in the drawing, since the chain ongaging means 17 is made fast to the chain 13. hen the rotating of the bridge section is completed, i. e., moved to the desired open raised position, the detachable claw means 17 is moved back so that it does not engage the chain 18, and thereafter the elevator platform may be moved up and down without in any wise interfering with the movable bridge The counterweight 12 operatively mounted upon one end of the bridgesection facilitates in an obvious manner the raising and lowering of the bridge section.

In order to insure the maintaining of the bridge section in open position against unintentional closing of the same by a strong wind or otherwise, a detachable chain engaging means 21 (in all respects identical in construction with detachable engaging means 17) may be preferably provided so that said chain may be locked in stationary position, and thereby secure the bridge in open position against unintentional closing of the same.

I claim:

1. .A. marine elevator embodying an elevator well; an elevator platform operatively disposed in said well; a removable bridge section covering said well, said section having apivot mounting adjacent said well and a flexible member; and means carried by said platform whereby said flexible member of said bridge section may be releasably engaged, and, when engaged said bridge section may be positively rotated by said platform about said pivot mounting into open and closed position, whereby said bridge section may be positively moved into open position and allowed to continue in open position While the elevator is free to move up and down in said well.

2. A marine elevator embodying an elevator well; an elevator platform operatively disposed in said well; a removable bridge section covering said well, and having a pivot mounting adjacent said well; sheaves mounted adjacent said well; a chain, having one end secured to one end of said bridge section, reeved through said sheaves and secured as respects the other end to said bridge section intermediate the length of said bridge section and means carried by said platform which may be caused to releasably engage said chain when desired.

3. A marine elevator embodying an elevator well; an elevator platform operatively disposed in said well; a removable bridge section covering said well, and having a pivot mounting adjacent said well; sheaves mounted adjacent saidwell; a chain, having one end secured to one end of said bridge section, reeved through said sheaves and secured as respects the other end to said bridge section intermediate the length of said section; means carried by said platform which may be caused to releasably engage said chain when desired; and locking means adjacent said Well, whereby said chain may be releasably engaged and said bridge section thereby locked into open position.

In witness whereof I hereunto subscribe HARRY Benton.

Images