US1265771A - Boat-launching apparatus. - Google Patents

Description

A. GBOHMANN. BOAT LAUNCHING APPARATUS.

7 APPLICATION FILED OCT. 14. I915- 1,265,771 Patented May14,1918.

3 SHEETS-SHEET 1.

3 44 M I I A. GROHMANN.

BOAT LAUNCHING APPARATUS.

APPLICATION F!LED ocr. I4. 1916.

1 265 771; Patented May 14, 1918.

3 SHEETS-SHEET 2.

WIT/V558:

A. GROHMANN.

BOAT LAUNCHING APPARATUS.

APPLICATION FILED 001114, 1916.

Patented Mayl l, 1918.

3 SHEETSSHEET 3.

ARTHUR GROHMAN'N, OF WILMINGTON, DELAWARE.

BOAT-LAUNCHING APPARATUS. I

Application filed October 14, 1916.

To aZZ whom it may concern.

Be it known that I, ARTHUR GROHMANN, a citizen of Germany, and a resident of Wilmington, in the county of New Castle and State of Delaware, have invented new and useful Improvements in Boat-Launching Apparatus, of which the following is a specification. I

This invention relates to devices for launching boats from the deck of a ship.

The object of my invention is to provide means whereby all the boats alined on the deck of a ship may be quickly and safely launched simultaneously from both sides of the ship or from either side.

Another object of this invention is to pro vide a launching apparatus which is controlled from aboard and adapted to launch the life boats from the boat deck'of the ship and lowered in steps, first alongside of one of the passenger decks then along another palssenger deck and finally lowered to the s1 e.

A further object. of this invention is an apparatus adapted for launching boats from the deck of a ship and to securely hold the boats at such a distance from the ship to prevent them from being capsized or thrown against the sides of the ship.

With the above and related objects in view, this invention comprises the construction, combination and arrangement of parts hereinafter described, a practical embodiment whereof is illustrated in the accomp nying drawing and is embraced within the scope of the appended claims. a

In the said drawing, Figure 1 is a plan view of a portion of the boat deck ofa ship showing my improved launching apparatus 3.

Fig. 2 1s a fragmentary sectional elevation of the ship; Fig. 3 is 'a fragmentary side elevation of an improved launching device; Fig. 4 is a fragmentary front elevation thereof; Fig. '5 is a view in the rear of that of Fig. 4; Fig. 6 is a side elevation of a portion of the ship; Fig. 7 is a view partly in section of the means for operating the launching apparatus; Fig. 8 is a view at right angles to that of Fig. '7 and Fig. 9 is an enlarged view of a section of the ship illustrating the step by step launching of a boat from the deck of the ship.

Referring more particularly to the drawing for a detail description of my invention,

10 represents the boat deck of a ship,-11

Specification of Letters Patent. 7

Patented May 14, 1918. Serial No. 125,719.

represents an upper passenger deck and 12 represents a lower passenger deck. 13 represents a davit whose shank is hinged to a bolt 14 mounted in a socket 15 fastened to the side of the ship to allow the davitto swing outwardly of the side of the ship; 16 represents a clamp spanning the shank of the davit and adapted. to prevent the davit from swinging. 17 represents a pair of bolts to each clamp and provided with nuts adapted to tighten the clamp, one ofwhich nuts, may be loosened and the. other; removed from its bolt to permit the clamp to release the davit. Above the shank the davit is arched, as shown, the arched portionpassing through a recessof the boat deck.

18 represents a guy having one end fastened to the boat; deck'andtheopposite end connected bya tackle at the topof the davit. 19 represents a life boat ontop of the boat deck suspended from afPair of davits by tackles 20. Each pair of davits is joined by a rope 20 which, ,togetherwith an oppositely disposed pairof guys 18, prevent the relative displacement of the davits.

21 represents a pair of -uides mounted on the boat deck and provided with cam grooves- 22. 23 represents a rack link provided with teeth on its under surface and having its front end hinged with a davit and its rear end provided with a roller 24: supported tov roll along the cam groove Off the. guides. 25 and 25 represent countershafts supported longitudinally of the ship in front of the guides 21 by hearings or brackets 26. On each counter-shaft, between each pair of brackets, is mounted a spur gear 27 to mesh with the rack 23, the rack being held in mesh by a roller 28 supported to roll over the top ofsthe rack by a bracket 29, said bracket being supported to' swing on the shaft on opposite sides of the gear 27.

30 represents a pair of stanchions provided with bearings for a tubular shaft 31. 32 represents a shaft projected through the shaftBl, one end of the shaft 32 carrying-a wheel 33 and the Opposite end carrying a gear 34. The gear 34.- is in mesh with a larger gear 35 carried by a stud provided with a smaller gear 36., 37 represents a larger gear carried by the shaft 31 and is in mesh with the gear 36. The shaft 31 is provided with a pair of ratchet-wheels 38 and 38". 39 and 39 represent a pair of clicks, the click 39 being adapted to engage the ratchet se the. ratchet 88 in opposition to that of the I ratchet 39 The shaft 31 is provided with a worm in mesh with a worm gear l0. The gear 40 is mounted on a stud carrying a pair of spur gears an and al i2 represents a standard provided with a hearing for the adjacent ends of shafts i3 and i3 supported transversely of the ship by hearings or brackets 44. The opposite ends of the said shafts a8 and i3 are connected with the countershafts by beveled gears The gears 41-1 and 41* are respectively in mesh with gears are and 4:6 The gear 46 is carried by a sleeve slidingly lceyed on the shaft 43 and the gear nr is similarly carried by a sleeve slidingly keyed on the shaft l3? A lever 48* is adapted to move the gear 46" into or out of mesh with the gear 41, and the lever 48 is adapted to move the gear 46 into or out of mesh with the gear e1 2.

From the above description, it will be readily understood that the life boats which are shown to he stowed on opposite sides of the loo-at dechmay he launched, and it launched may he stowed either simultaneously from both. sides of the ship or from either side. Thus to launch the boats from both sides of the ship, the gears to and 456 are moved into mesh by their respective lovers, and when the wheel 32 is turned in the direction of the arrow, the countersha fts will turn in opposite directions to actuate the launching apparatus to cause the clavits carrying the boats to swing outwardly "from the sides of the ship. forcing either one or the said gears at or 46 out of mesh with its corresponding gear, one of the counter-shafts will be disconnected and the turning of the wheel 32 will result in launching the boats from one side of the ship only. It will also be understood that when the wheel 32 is revolved in an opposite direction to that shown by the arrow, the process is reversed, that is the davits will be caused to swing inwardly of the side ofthe ship and carrying the boats in position for stowing.

Assuming now that the wheel 32- is turned in a direction for launching the boats from one side of the ship only, the motion of the wheel is transmitted by way of the hereinb'efore described gearing and transversely disposed shaft to the counter-shaft which is thus caused to rotate with its gears in a direction to actuate the racks to move outwardly from the deck of the ship. it will he observed there is a pair of racks to each pair of davits. Each pair of: racks will, therefore, during the outward movement, force the davits to swing outwardly from the side of the ship and thus carry the heat suspended from said pair oi d avits away from its cradle 50 and off the heat deck of the ship. Assuming that the davits have been swung in the position shown in the first dotted lines in Fig. 9, the boat may then be lowered from the davits and the clavits caused to swing in the opposite direction to bring the boat alongside the first passenger deck of the ship. After the passengers of said first deck have boarded the heats, the boats are lowered until they are in line with the second passenger deck. The davits may then be caused to swing outwardly of the ship until they are in a position shown in dotted lines in Fig. 9 while the boat may be launched as shown. When the boats are in the water they need not be detached from the davits, as the davits will prevent the boats from being thrown by the sea against the sides of the ship, being held rigidly by the racks. Thus time may begiven for anyone who remained on board ship to; reach the boats. Also each hoats crew may first get ready for operating the boat and wait for the first opportunity when it is safe to steer away from the ship and then .disconnect the boat from the davits.

Having thus described my invention and the advantages to be derived therefrom what I claim as new and desire to protect by Letters Patent is: I V

1. An appa 'atus for launching a life boat from the deck of aship comprising a pivotally supported davlt, an actuating mecha:

nism therefor comprising a member "adapted to swing in the plane of the davit, and a cam engaging said member and controlling and limiting the extent of said swing 2. An apparatus for launching 'a life boat from the deck of a ship comprising a pivotally supported clavit, an actuating rack link therefor pivoted to and adapted to swing in the plane of the da-vit, and means for guiding the free end of the link to keep the rack at all times in mesh with a fixed driving pulley.

3. An apparatus for launching life boats from the deck of the ship comprising a pair of davits to each boat, means supporting the clavits to swing in a vertical plane, a rack pivotally connected with each davit, means for guiding the racks transversely of the deck, said guiding means provided with cam slots adapted to causethe racks to swing in the plane of the clavits.

d. An apparatus for launching two life boats from a deck on the opposite sides of a ship, comprising apair of davit's. to each looat each pair 01" clavits supported to swing in a vertical plane in the direction opposite to that of the other pair, a rack to each d'avit, means for guiding the racks oi each pair of davits transversely of the decldsaid guiding means adapted to cause the racks to swing in the plane of the davits.

5. An apparatus for launching a life boat from the declr of a ship, a pair of davits to each boat supported to swing in a vertical plane, a rack to each davit, a cam adapted to guide the rack transversely of the deck and to cause it to swing in the plane of the davits, and means on board ship to control the movement of the racks.

6. An apparatus for launching life boats from the deck of a ship, comprising a pair of davits to each boat supported to swing in a vertical plane, a rack link with each davit, means for guiding the rack transversely of the deck, a driving shaft, a gear mounted thereon to mesh with the rack, and a roller bearing for the rack supported to swing in the plane of the davits.

7. An apparatus for launching a life boat from the deck of a ship comprising pivotally supported davits, an actuating rack link pivoted to each davit and extending crosswise of the ship, a driving pinion for said rack link, and a swinging yoke mounted on the same center as the pinion and embracing the rack link acting to hold it at all times in mesh with the pinion, together with camways for guiding and limiting the throw of the rack links.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

ARTHUR GROHMANN.

\Vitnesses.

C. WILSON ROBERTS, CARRIE E. HAUBERT.

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

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