US1078080A - Davit. - Google Patents

Description

P. LAGAAY AZ.

DAVIT.

APPLICATION FILED JUNE 20, 1912.

Patented Nov. 11, 1913.

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PIETER LAG-AAY AZ, OF ROTTERDAM, NETHERLANDS.

DAVIT.

Specification of Letters Patent.

Patented Nov. 1 1 1 913.

Application filed Jane 20, 1912. Serial No. 704,854.

To all whom it may concern:

Be it known that I, Pmrnn LAGAAY AZ, subject of the Queen of the Netherlands, residing at \Vesterstraat 32, Rotterdam, Kingdom of the Netherlands, have invented certain new and useful Improvements in or Belating to Davits, of which the following is a specification.

This invention relates to a davit for suspending, securing and lowering life-boats with the object of stowing them in the smallest possible space and in spite of that insuring their easy, rapid and reliable manipulation.

According to this invention the boats are placed cndwise in a tilting frame arranged. on deck and replacing the usual type of davits, the boats being arranged with the keel facing outward. Arranged in that manner, a series of life-boats can be placed on both sides along the deck, in sufficient number to carry all the passengers even of a very large ship.

By means of a toothed wheel transmission and of a worm gear, the frame can be turned over so as to bring it as a whole together with the life-boat into horizontal position, the boat being in position ready to be lowered. In that position, when the longitudinal axis of the boat is at a right angle to the longitudinal axis of the ship itself, an arm of the frame strikes a stop which prevents it from turning farther. The boat is secured to the frame by means of pulley blocks, so that the passengers can enter it in the swung out horizontal position, whereupon it can be lowered in the usual manner. The oars can also be put out ready for use before the boat touches the water, so that it can be pulled away from the ship immediately it is in the water. The frame is rotatably mounted on deck in a simple manner being provided with a foot resting flat on the deck when the frame is in vertical position. This foot is secured by means of hooks, so that the whole frame with the boat suspended therefrom is secured to the deck. The frame is however also held by the toothed wheels of a transmission gear, so that the frame can be turned outward by means of a hand wheel with worm gear. The very simple manipulation makes it possible even for entirely inexperienced persons to lower the life-boats.

A construction according to this invention is illustrated by way of example in the accompanying drawing, in which Figure 1. is an elevation of the device in the swung out position, and with the boat partly lowered, Fig. 2. a vertical section through the device with the life boat in the normal position of rest, Fig. 3. is a plan of Fig. 2, Fig. 4 a perspective view of the frame, Fig. 5. a side elevation of a boat lowered with the ship in a characteristic position and Fig. 6. is a plan of Fig. 5, the boat being however provided with fenders.

On the deck 1 of the ship are frames 2 rotatably mounted about pins 3 and replacing the known davits. These pins are mounted in two brackets 4 in such a manner that in the vertical position of the frame 2, the foot 5 rests on the deck. For the purpose of securing the frame in the above mentioned position, one or more latches G engaging over the foot 5 may be arranged on the deck. The frame 2 consists of two lateral parts 7, the upper portions of which have the exact shape of the gunwale of the boat. These lateral parts terminate at the bottom in the foot 5. A curved central rib 8 joins the connecting point of the lateral parts 7, to the foot 5. A strong arm 9 is connected to the frame so that in the horizontal position of the frame or of the life boat secured to the frame, it strikes a fixed stop 10 and thus prevents the frame from being turned beyond the horizontal position. This arm 9 is connected in a suitable manner to the foot of the frame. Similar stops can be arranged also at the two lateral parts 7 of the frame for instance under the pivot pins 3. As already stated, the pin 3 rigidly secured to the frame, is mounted in brackets 4. These brackets 4 are preferably connected together by cross-bars 11 and 12 arranged on the deck (Figs. 2 and 3) so that a firm connection is insured. The bracket is of course firmly bolted to the deck.

For the purpose of turning over the frame, the pin 3 is provided at one or at. both ends with a toothed wheel or quadrant 13 engaging with toothed wheels or quadrants 14 secured to the spindle 15 mounted in the bracket 4. The spindle 15 is moreover provided with a worm wheel 16 which can be driven by means of the worm 18 provided with a hand wheel 17. The life-boat is suspended by two pulley blocks (Fig. 1) which are attached to the central rib 8 of the frame. The ends of the two pulley block cables are placed over the pulleys 19 and 20 arranged at opposite sides of the central rib 8, so that the cables can be easily tightened until the gunwale of the boatis brought firmly against the lateral parts 7. The cables are then secured to cleats 21 arranged on the foot 5 of the frame 2. In that position of the boat, in which it is securely tightened against the frame, the projection 22 which constitutes an eX tension of the central rib, engages under the end of the boat and forms a point of suspension for the stem or stern according to the position in which the boat is put in. As a further means for securing the boat to the frame, a bracket 23 can be placed about the body of the boat and connected in an easily detachable manner to the lateral parts of the frame, for instance by means of eye and pin connections. Moreover, the boat rests on the arm 9 with its puddening 2% arranged on the stern or stem. If the ship has a list or if for some reason itis feared that the stem or stern of the boat will be pressed too firmly or thrown violently against the side of the ship, a spring controlled roller 25 (Fig. 5) arranged at the stern or stem and insures a safe lowering of the boat. In order to prevent the swinging of the boat during lowering, the boat may be pro-- vided with lateral fenders 27 provided at their ends with rollers 520. In the position of rest, all the life-boats are therefore standing endwise on the deck and thus occupy only very little space. They can be covered, together with the frame and driving gear, by a cover, so that the whole is protected against damp. hforeover, water cannot get into the boats when standing upright, so that the plug in the bottom of the boat can be always left in.

The manipulation of the boat is so simple that even a passenger can lower it. It is merely necessary to loosen the latch 6, and to remove the bracket 23, whereupon the boat together with the frame can be at once moved by means of the hand wheel 17 into the horizontal position shown in Fig. 1, so that the arm 5) engages with the stop 10. hi reover, as a further means for securing it in that position, a stop 28 connected to the toothed quadrant 13 may be adapted to engage a stop 29 provided on the bracket. In order to facilitate entry into the boat, a wide plank could be placed over the stem. It will be seen that as soon as the boat is in the horizontal position, a person can enter it at once. The lowering of the boat is then effected in the usual manner.

If the boat is to remain alongside of the ship, the painter of the boat can be secured to the end of the frame. The frame is then used in the horizontal position as a boom.

\Vhat I claim is:

1. In a davit device, a normally vertically positioned frame pivoted to the deck of a ship, means for securing a life boat to said frame with its longitudinal axis extending at right angles with respect to the deck of the ship and having its keel facing out ward, and means for lowering said frame into a horizontal position, said first men tio-ned means serving to lower said boat from said frame when the latter in its horizontal position.

2. In a davit device, a norn'ially verticall positioned frame pivoted to the deck of a ship, means for securing a life boat to said frame with its longitudinal axis extending at right angles with respect to the deck of the ship and having its k-eol facing outward, and means for lowering said frame into a horizontal position, and means positively holiiingsaid frame in its horizontal position, said first mentioned means serving to lower said boat from said frame when the latter is in its horizontal position.

3. In a davit device, a pivoted frame comprising a bifurcated member and a central member, releasable means for securing a life-boat, to the central member and between the bifurcated members, means for lowering said frame into a horizontal position and means for lowering said boat from said central member, with its stem or stern toward the ship.

4. The combination with the deck of a ship of a frame pivoted thereto and comprising two side members, a central member, a projecting arm, and a foot, a life-boat arranged between said side members and resting with one end on said arm, means for maintaining said frame in a vertical position, a stop for engaging said arm when the frame is in horizontal position, a band passing around said boat and attached to said side members when in vertical position and means for lowering said boat when the frame is in horizontal position.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

PIETER LAGAAY AZ.

lVitnesses J OHANNES LAGAAY, JoHAN RosnnooM.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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