US2640454A - Means for operating hatch-covers aboard ship - Google Patents

Description

Filed July 14, 1949 June 2, 1953 KUMMERMAN 7 2,640,454

MEANS FOR OPERATING HATCH-COVERS ABOARD SHIP 2 Sheets-Sheet 1 INVENTOR.

HEN/Pl KUMMER MAN A TTORNEYS June 2, 1953 KUMMERMAN 2,640,454

MEANS FOR OPERATING HATCH-COVERS ABOARD SHIP Filed July 14,. 1949 2 Sheets-Sheet 2 INVEN TOR. HE NA! -KUMMEAMAN BY f A T TORIVEYS I8--I8'. The shaft [8 is extended by a screwrod 34 having a sliding disc 35 threaded on it, the sliding disc 35 being provided with a projecting heel 38 slidably engaging a slot 31 in the frame to prevent rotation of the sliding disc 35. The disc 35 further has a finger 38 projecting therefrom to actuate limiting contacts 39 and 40 at the opposite ends of its travel. To avert the danger of injury to the device in case of non-operation of the limit contacts, there is provided in conjunction with the above-described assembly a safety device comprising two flanges 4| and 42 loosely mounted on the shaft l8 and each connected through suitably calibrated spring means 43 with further flanges 45, 44 keyed on the said shaft l8'-l8. The flanges 4i and 42 are formed with clutch teeth 46 and 41 adapted to mesh with mating teeth 48 and 43 provided on the opposite faces of the sliding disc 35. Shaft I8 is located in flanges pertaining to the extension 58 of housing 3|]. The above-described device operates as follows:

At the end of a stroke the finger 38 engages the contact element 39 or 40. Should the motor fail to stop, the teeth 48 of the sliding clutch disc will engage say the teeth 41 of flange M. This flange will rotate and produce by means of fingers 4| and 45 the tensioning of spring 43. The overload created by this supplementary force produces the cutting of the safety fuses of the motor supply circuit.

It will be observed that the jack shank 22 is preferably only formed with a screw thread over a very small vertical extent thereof adjacent its free end 63, while the bushing 21 is internally threaded throughout its whole length. This makes it possible to insure that a perfectly tight seal is provided for the interior of the jack by means of a packing ring gasket 6| or rubber seal ring adapted to be compressed at the end of the stroke of the jack, or both such means simultaneously. There is nothing to prevent the provision of a supply of oil within the said bushing, an outer casing or cover 62 being of course in that case provided.

As shown in Fig. 2 there is a single motor I! actuating through the medium of the safetydrive device 30 previously described, a shaft 8 actuating the two jacks l2, 12. This shaft has each of its opposite ends operatively projecting into a related one of the coaxial pair of jacks l2. Asa result of this arrangement, there is no necessity of providing an angular transmission of any sort to operate said jacks.

It will of course be understood that the invention is in noway limited to the exemplary embodiments illustrated and described, but only as defined by the scope of the ensuing claims.

What I claim is:

1. In a ship having a deck provided with a hatch surrounded by a coaming and with hatch covers, a control arrangement for the ships hatch covers of the type comprising mutually pivoted hatch sections at least one of which is also pivoted to the latch coaming, said arrangement comprising at least one hollow body pivotally mounted on the ships deck outside the hatch coaming and laterally thereof, and a movable member slidingly located in said body and pivotally and directly secured to the hatch section which is pivoted to the coaming, this latter pivotal connection being closely adjacent the pivotal connection between the corresponding hatch cover and the coaming, said body and member forming a jack and being adapted to cause the sliding of said member in said body and the lifting of the cover,

2. An arrangement as in claim 1, wherein the hatch covers consist of two pairs of hatch sections, the sections of each pair being pivoted together, said pairs being alined to provide proximal and end sections, two pivots oppositely situated with respect to the hatch opening for the pivotal mounting of one of the end sections of each pair on the coaming, the said jack means being located in the vicinity of each of said ends and actuating the said section which is pivoted to the adjacent part of the hatch coaming.

3. An arrangement as in claim 1, wherein the hatch covers consist of two pairs of hatch sections, the sections of each pair being pivoted together, said pairs being alined to provide proximal and end sections, two pivots oppositely situated with respect to the hatch opening for the pivotal mounting of one of the end sections of each pair on the coaming, the said jack means being located in the vicinity of each of said ends and actuating the said section which is pivoted to the adjacent part of the hatch coaming, and wherein two pairs of jacks are located oppositely with respect to the hatch opening and actuate said adjacent pivotally mounted hatch sections.

v4. In a ship having a deck provided with a hatch surrounded by a coaming and with hatch covers, an arrangement for the control of ship's hatch covers of the type comprising pairs of mutually pivoted hatch sections at least one of each pairbeing pivoted to the hatch coaming, to provide proximal and end sections, said arrangement including one end hatch section, a pivot on one side of the hatch coaming for pivotally supporting said section, additional pivots on said end section only a short distance away from said first pivot and parallel thereto, a pair of jacks situated outside the hatch opening, each of said jacks comprising a main hollow body pivotally mounted on the ships deck and a movable element sliding- -ly located in said body and pivotally connected to said additional pivots, a drive shaft abutting to said jacks, a motor for the actuation of said shaft, gear means in said jack for transforming the rotation of said drive shaft into the sliding movement of said sliding member inside said hollow body, said drive'shaft extending outside said hatch and being parallel to said pivots, and a drive transmission for the control of said jacks, said drive transmission including a bevel and worm gearing between said motor and said shafts.

5. In an arrangement as in claim 4, automatic movement arresting means in said drive transmission including limit switches stopping said motor and actuated upon said jack reaching the end of its pivotal movement in each direction.

6. In means for opening and closing a hatchway having a coaming including side and end walls and a hatch cover adapted to fit on said coaming, frame plates fixed to one corner portion of the coaming and-projecting in spaced parallel relation therefrom, an arm fixed to said hatch cover at one edge thereof and terminating centrally between'the plates, a pivot bolt passing through said plates and the terminal portion of said arm, alined bearings carried by said plates between said bolt and coaming, a jackframe provided with journals resting in said bearings, a, nut member rotatably mounted in said .frame with its longitudinal axis perpendicular to the axis of said journals, a jack screw extending through said nut member and having its upper end pivoted to said arm, and means to rotate said nut member.

7. In means for opening and closing a hatchway having a coaming including side and end walls and a hatch cover adapted to fit on said coaming, frame plates fixed to one corner portion of the coaming and projecting in spaced parallel relation therefrom, an arm fixedv to said hatch cover at one edge thereof and terminating centrally between the plates, a pivot bolt passing through said plates and the terminal portion of said arm alined bearings carried by said plates between said bolt and coaming, a jackframe provided with journals resting in saidbearings, a nut member rotatably mounted in said frame with its longitudinal axis perpendicular to the axis of said journals, a jack screw extending through said nut member and having its upper end pivoted to said arm, a shaft extending laterally through said frame, meshing miter gears carried by said nut member and ing means for said shaft.

8. In means for opening and closing a hatchway having a coaming including side and end walls and a hatch cover adapted to fit on said coaming, frame plates fixed to one corner portion of the coaming and projecting in spaced shaft, and drivparallel relation therefrom, an arm fixed to said hatch cover at one edge thereof and terminating centrally between the plates, a pivot bolt passing through said plates and the terminal portion of said arm alined bearings carried by said plates between said bolt and coarning, a jackframe provided with journals resting in said bearings, a nut member rotatably mounted in said frame with its longitudinal axis perpendicular to the axis of said journals, a jack screw extending through said nut member and having its upper end pivoted to said arm, a shaft extending laterally through said frame, meshing miter gears carried by said nut member and shaft, and driving means for said shaft, and including a motor and a safety circuit device controlling said motor.

HENRI KUMMERMAN. 7

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 681,624 Cowles Aug. 27, 1902 1,361,221 Bentley Dec. 7, 1920 1,795,786 Lovett Mar. 10, 1931 2,256,087 Hay Sept. 16, 1941 2,486,107 Brump Oct. 25, 1949

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