US680823A - Apparatus for raising or lowering ships' boats & c. - Google Patents

Description

No. 680,823. Patented Aug. 20, IBM.

I A. WELIIM. APPARATUS FOR RAISING 0B LOWERING SHIPS BOATS, 8L0.

(Application filed May 27,1901.

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No. 680,823. Patented Aug. 20, [90L A. WELIN. APPARATUS FOR RAISING 0B LOWEBIMG SHIPS BOATS. 6w.

(Applicatiqn filed May 27, 1901 3 Sheets-Sheet :2.

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No. 680,823. Patented Aug. 20, IQOII.

A. WELIM. v APPARATUS FUR RAISING 0R LOWERING SHIPS BOATS, 81.0.

(Application filed May 27, 1901.)

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AXEL VVELIN, OF LONDON, ENGLAND.

APPARATUS FOR RAISING 0R LOWERING SHIPS EQATQ- SPECIFICATION forming part of Letters Patent No. 680,823, dated August 20, 1901.. Application filed May 2'7, 1901. Serial No. 62,103. (No model.)

T0 on whom it may concern:

Be it known that I, AXEL WVELIN, engineer, a subject of the King of Sweden and Norway, residing at 24 and 25 Fenchurch street, in the city of London, England, have invented certain new and useful Improvements in Apparatus for Raising or Lowering Ships Boats, of which the following is a specification.

According to this invention the davit turns about a center moving along guides, and its lower end is in the form of a toothed quadrant, preferably circular, rolling on a rack. The weight of the boat and its contents tend to make the quadrants roll on the racks, inclining the davits more and more and at the same time moving them outward. Each davit carries a pawl engaging with a rack in order to prevent the davits from being brought back by the rolling of the ship, or the motion of the davit may be controlled by a screw or other means. If the davits are curved and inboard of the boat, they need not be at the ends of the boat.

Figures 1 and 2 are side elevations of davits constructed according to this invention. Fig. 3 is an elevation, and Fig. 4 a plan, of the checks employed.

a is the davit, carrying a pin Z), running between guides c.

In Fig. 1 the pin b Works in a block cZ, sliding between the guides, while in Fig. 2 the pin 1) is in the form of a roller running between the guides.

e is a toothed quadrant forming the lower part of the davit, and f is a rack on whichit rolls.

In Fig. 1 the motion is controlled by the screw g, working in a nut formed in a lug on the block d, while in Fig. 2 the outward motion is controlled by the rope h, and the davit is prevented from being swung back by the rolling of the ship by the pawl 70, which gears with the rack Z.

The chock m is fixed and supports one end of the chock n, whose other end is supported by the link 0. The chock n is secured in position by the lever-catch 19. To lower the boat, the lever-catch p is raised out of the hook q, and then as the boat moves outward it pushes the chock n with it into the position shown in dotted lines in Fig. 3.

In cases Where the apparatus may be in danger of getting covered by ice a hole is bored lengthwise through the body of the rack and connected with a steam-pipe. By

this means the ice is melted and the gear kept in working order.

I/Vhat I claim is- 1. The combination of a davit, a pivot about which the davit can turn, guides for the pivot, a toothed segment at the lower end of the davit, and a rack on which the segment can roll.

2. The combination of adavit, a pivot about which the davit can turn, guides for the pivot, means for controlling the movement of the pivot in the guides, a toothed segment at the lower end of the davit, and a rack on which the segment can roll.

3. The combination of a davit, a pivot about which the davit can turn, a block carrying the pivot, guides for the block, a nut fixed to the block, a screw working in the nut, a toothed segment at the lower end of the davit, and a rack on which the segment can roll.

4:. The combination of a davit, means for moving the top of the davit outward, a stationary chock, a second chock supported at one end by the first, and links supporting the other end of the second chock.

5. The combination of a davit, a pivot about which the davit can turn, guides for the pivot, a toothed segment at the lower end of the davit, a rack on which the segment can roll, a stationary chock, a second chock supported at one end by the first, and links supporting the other end of the second chock.

6. The combination of a davit, a pivot about which the davit can turn, guides for the pivot, means for controlling the movement of the pivot in the guides, a toothed segment at the lower end of the davit, a rack on which the segment can roll, a stationary chock, a second chock supported at one end by the first, and 5 links supporting the other end of the second chock.

7. The combination of a davit, a pivot about which the davit can turn, a block carrying the pivot, guides for the block, a nut fixed to the block, a screw working in the nut, a toothed segment at the lower end of 'the davit, a rack on which the segment can roll, a stationary chock, a second chock supported at one end by the first, and links supporting the other end of the second chock.

AXEL WELIN. Witnesses:

R. B. RANSFORD, J. H. WI-IITEHEAD.

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