US1517345A

US1517345A - Bilge block

Info

Publication number: US1517345A
Application number: US596224A
Authority: US
Inventors: James L Crandall
Original assignee: Individual
Current assignee: Individual
Priority date: 1922-10-23
Filing date: 1922-10-23
Publication date: 1924-12-02
Anticipated expiration: 1941-12-02

Description

D, 2, 1924. 1,517,345 I J. L. CRANDALL BILGE BLOCK Patented Bec. 2, 1924.

JAMES L. CRANDALIJ, F MALDEN, MASSACHUSETTS.

BILG-E BLOCK.

Application filed C'ctpbei' 23, 1922. Serial No. 596,224.

To all w hom t may concern Be it known that I, JAMES L. CRANDALL, a citizen of the United States, residing at Malden, inthe county of Middlesex and State of Massachusetts, have invented an Improvement in Bilge Blocks, of which the following is a specification.

This invention relates to bilge-blocks for dry docks, and has for its object to improve 1.@ the construction of the same to the end that a very substantial block may be produced, capable of resisting or supporting a heavy weight, which may be operated easily even when the weight is upon it.

The invention may consist of a base-block and a bilge-engaging block pivoted thereon and rollers which are adapted to roll upon each other and the base and bilge-engaging blocks whereby to raise and lower the bilge-` engaging block; and said rollers and blocks may be so arranged as to be set in the raised position of the bilge-engaging block whereby to maintain the bilge-engaging block in raised position; and the invention also consists in means to operate said rollers.

F ig. 1 is a side elevation of a bilge-block for dry-docks embodying the invention, the bilge-engaging block being lifted into its normal oi' raised position to engage the bilge 30 of the vessel.

F ig. 2 is a` view similar to Fig. 1 but illustrating the bilge-engagiiig block in lowered position. p

Fig. 3 is a front View of the bi'lge block of Fig. 1.

Fig. 4 is a section along line 1--4 of JFig. 1.

Fig. 5 is a sectional detail of the bilgeblock raising and lowering mechanism taken along line 5 5 of Fig. 3.

Fig. 6 is a front view of the lower roller of the mechanism.

As here shown the bilge-engaging block l0 is or may be mounted upon and pivoted to the base-block 1l by the pivot-members 12, and said pivot members may be of any suitable construction as, for instance, that illustrated in my Patent No. 808,072, dated December 26, 1905. Said pivot members may beformed or provided with inwardlydirected projections 12a which are adapted to engage, whereby to limit the extent of the raising movement of the bilge-engaging block.

The means for raising and lowering the bilge-engaging block is located at the outer end thereof opposite its pivotal connection and between said bilge-enga-ging block and said base block 11.

The raising and lowering means may include a plate 1li which is or may be secured to the under side vof the bilge-engaging block. Said plate is or may be formed at its ends with the, preferably, cylindricallyformed cam faces 15, the axis of which is disposed transversely to said bilge-engaging block. The intermediate portion of the plate disposed between said cylindricallyformed faces 15 is formed or provided with gear teeth 16 which have a pitch line substantially coincident with said faces 15 and an axis substantially coincident with the axis of said cylindrically-formed faces.

A similar plate 17 is r may be secured to the upper face of the base-block and said plate may have its ends formed with the. oylindrically-formed cam faces 18 and in termediate gear teeth 19 which have a pitch line substantially coincident with said faces 18 andan axis substantially coincident with the axis of said faces 18. Said cylindrical faces 18 may terminate in the horizontallydisposed flat faces 20 on which an operating roller is adapted to be supported in the raised position of the bilge-bloclnand said plate 17 is preferably formed with abutments 21 which are disposed at the ends of and extended above said flat faces 20 and are adapted to be engaged by an operating roller and restrict it from movement beyond its operated position.

The raising and lowering means may also include a lower roller 25 and an upper roller 26 adapted to engage and roll upon said

plates

17 and 14 respectively. Said lower roller 25 is or may be formed with the cylindrical end-portions 27 adapted to engage and roll upon the cylindrically-formed faces 18 of said plate 17, and the intermediate gear-toothed portion 28'which is adapted to mesh with and rotate in contact with .the gear teeth 19 of said plate 17. flhe pitch line of said gear toothed portion 28 is adapted to be substantially coincident with the faces of the cylindrical end-portions 27 of said roller 25. The'upper roller 26 is or may be similarly formed and .may have the cylindrical end-portions which -are adapted to engage and roll upon the cylindricallyformed faces 15 of said plate 1a and the cylindrical end-portion 27 of said roller -25, and the intermediate gear-toothed portion 31 which is adapted to mesh with the gear teeth 16 oi said plate and also with the gear teeth 28 ot said roller 25. The pitch line of the gear toothed portion 31 of said roller 26 is adapted to be substantially coincident with the faces ot said end-portions 30.

Preferably said

rollers

25 and 26 are o' the same diameter.

Said rollers are or may be adapted to maintain engagement and alignment with each other and with said

plates

14 and 17 by the inter-meshing ot the gear teeth oit said rollers and plates although means preterably are provided to ensure the operative engagement ot said rollers and plates. For this purpose, said plate 1l may be formed or provided with the cylindrical pivot-members 55 disposed on opposite sides thereot and arranged concentrically with the axis ot the gear-toothed portion and cylindricallyformed faces thereof, and the upper roller 26 may be formed or provided with pivotmembers which may comprise the reduced end-portions 36. Links 37 may be pivotally received on the pivot-members of said plate and roller and secured in place by suitable means as cotter pins 38, whereby to connect the upper roller 2G to said plate 14e for rolling engagement therewith. rEhe plate l? may be similarly formed to provide the pivot-members 39 and the lower roller may have the reduced end-portions 10 which comprise pivot-members. Links 41 may be pivotally received on the pivot members of said plate 17 and roller 25 whereby to connect said roller to said plate for rolling` engagement therewith. Said

rollers

25 and 26 may be connected by links 42 which are pivotally received on the pivot-members ot said rollers. The arrange-ment of links is such that the rollers are held in operative engagement with each other and with said plates but the links are not herein designed to act to raise and lower the bilge-engageing block, and the rollers and plates may function without said links.

Said lower roller 25 may be iormed or provided with an extension 45 at one, or both, ends adapted to be engaged by a wrench or other suitable tool by which to rotate said roller and actuate the mechanism to raise and lower the bilge-engaging block. A pawl lo is or may be pivoted to the plate 17 and may be movable into engagement with the teeth of the lower roller 25 whereby to hold said roller, and consequently the bilge-engaging block, in raised position and lock the mechanism against operation; and said pawl must be removed from locking position before the mechanism can be operated to lower the bilge-engaging block.

In the lowered position of the bilge-engaging block, the mechanism may be in some position as illustrated in Fig. 2. lVhen the bilge-engaging block is to be raised, the

i imposed lower roller 25 is rotated and consequently rolls upward upon the plate 17 of the baseblock 11, due to the engagement of the gear teeth ot' said roller and plate. The rotary movement ot said lower roller 25 also etfects the rotation ot the upper roller 26 in the reverse direction, due to the engagement of the gear teeth ot said rollers, and said upper roller is consequently rolled upon the plateletA of the bilge-engaging block 10 by reason of the engagement of t-he gear teeth of said upper roller and plate. The inward movement ot said rollers serves forcibly to raise the bilge-engaging block 10. In the extreme inward position, the rollers may assume a position slightly beyond the plane of the axes oi' the cylindrically-formed faces ot the plates 141 and 17 with the lower roller supported upon the horizontally-disposed iace of the plate 17 and in engagement with the abutments 21 of said plate, in which position said rollers may be held by the weight otl the bilge-engaging block or the weight of vthe vessel supported by said block; and said. pawl 46 may positively lock said rollers in such position, whereby to lock said bilge-r engaging block in raised position. lVhen the pawl is removed from engagement with the lower roller, the bilge-engaging block may be lowered by rotating the lower roller :in the proper direction whereby to move both rollers outwardly and permit the bilgeengaging block to descend.

l claim:

1. ln a bilge-block, the combination of a base-block, a bilge-engaging block pivoted thereto, and means for raising and lowering said bilge-engaging block including superrollers disposed between said blocks and in rolling engagement with each other and said blocks, and means for driving said rollers.

2. ln a bi'lge-block, the combination of a pivotally connected base-block and a bilgeengaging block, both blocks provided with converging cam faces and means for raising and lowering the bilge-e-ngaging block including superimposed rollers disposed between said blocks and the cam faces thereof and in rolling engagement with each other and said cam tt'aces and means for driving said rollers upon each other and said cam faces.

3. In a bilge-block, the combination of a base-block, a bilge-engaging block pivoted thereto, and both blocks provided with gear teeth7 means tor raising and lowering said bilge-engaging block including superimposed rollers disposed between said blocks and in rolling engagement with each other and said blocks, said rollers having gear teeth adapted to mesh with the gear teeth of said blocks, and means ior rotating said rollers.

el.. ln a bilge-block, theI combination of a pivotally connected base-block and a bilgeengaging block, both blocks provided with converging cam faces, means for raising and lowering said bilge-engaging block including superimposed rollers disposed between said blocks and the cam faces thereof and in rolling engagement with each other and said cam faces, said rollers having intermeshing gear teeth also disposed in mesh with the gear teeth of said blocks, and means for rotating said rollers.

5. In a bilge-block, the combination of a pivotally connected baseeblock and bilgeenga-ging block plates having cam faces and gear teeth carried by;y the proximate faces of said blocks, and means to raise and lower said bilge-engaging kblock including superimposed ro-llers disposed between and in rolling engagement with the cam faces of said plates and having engaging gear teeth also .arranged in engagement with the gear teeth of said plates, and means to rotate said rollers.

6. In a bilge-bloclr, the combination of a base-block, a bilge-engaging block pivoted thereto, and means for raising and lowering said bilge-engaging block including a. roller disposed between said blocks in a position to roll upon said bilge-engaging block, and a second roller disposed between said blocks in a position to roll upon said base-block and said iirst roller.

7. In a bilge-block, the combination of a base-block, a bilge-engaging block pivoted thereto provided with a lower cam face, and means for raising and lowering said' bilge-engaging block including a roller disposed between said blocks in a position to roll upon said cam face and a second roller disposed between said blocks in a position to roll upon sa-id base block and said first roller.

8. In a bilge-blocl the combination of a base-block, a bilge-engaging block pivoted thereto provided with gear teeth and means for raising and lowering said bilge-engaging block including a roller disposed to roll upon said bilge-engaging block and having gear teeth arranged in mesh with the teeth of said bilge-engaging block and a second roller disposed to roll upon said base block and said first roller and having a positive driving connection with said first roller.`

9. In a bilge-block, the combination of a base-block, a b-ilge-engaging block pivoted thereto provided with a lower cam face and gear teeth, and means for raising and lowering said bilge-engaging block including a roller disposedbetween said blocks in a position to roll upon said cam face and having gear teeth arranged in engagement with the gear teeth of said bilge-engaging block, and a second roller disposed between said blocks in a position to roll upon said base block and said first roller. l

lO. In a bilge-block, the combination of a base-block, a bilge-engaging block pivoted thereto, a plate carried by the lower face of said bilge-engaging block having a cam face and gear teeth, and means to raise and lower said bilge-engaging block including a roller disposed between said blocks in a position to roll upon the cam face of said plate and having-gear teeth engaging the gear teeth of said plate` and a second roller disposed between said blocks in a position to roll upon said base block and said first roller.

1i. In abilge-block, the combination of a base-block provided with an upper cam face, a bilge-engaging block pivoted to said base-` blocl; and means for raising and lowering said bilge-engaging block including a roller disposed betweensaid blocks in a position to roll upon said bilge-engaging block, and a second roller disposed between said blocks in a position to roll in engagement with said first rollerkand the cam face of' said basebloclr. l

12. In a vbilge-bloclr, the combination of a base-block provided with an upper cam face and gear teeth, a longe-engaging block pivoted to said base-block, and means for raising and lowering said bilge-engaging block including a roller disposed between said blocks in a position to roll upon said bilgeengaging' block, and a. second roller disposed between said blocks in a position to roll upon said first rollerand the vcam face of said base-block and havingA gear teeth meshing with the gear teeth of said base-block.

13. In a bilge-block, the combination of a base-block, a plate having fa cam face and gear teeth carried by the upper face of said base-block, a bilge-engaging block pivoted to said base-block, andy means to raise and lower said bilge-engaging block including a roller disposed between said blocks in a position to roll upon said b-ilge-engaging block, and a second roller disposed between said blocks in a position to roll in engagement with said iirst roller and the cam face of saidk plate and having gear teeth meshing with the gear teeth of said plate.

,14. In a bilge-block, the combination of a base-block provided with a cam face, a bilgeengaging block Divoted to said base block provided with a cam face and gear teeth,

`and means to raise and lower said bilge-engaging block including a roller disposed between said blocks in a position to roll upon the cam face of said bilge-'engaging block and having gear teeth meshing with the gear teeth of said block, and a second roller disposed between said bloclrs in a position to roll upon said iirst roller and the cam face of said base block and having gear teeth. meshing with the gear teeth of said first roller.

15. In a bilge-bloclr, the combination of a base-block provided with a cam face and gear teeth, a bilge-engaging block provided n Eil with a cam face and gear teeth and pivoted to said base-block, and means to raise and lower said bilge-engaging' block including a roller disposed between said blocks in a position to roll upon the cam face of said bilge-engaging block and having gear teeth meshing with the gear teeth of said bilge-engaging block, and a second roller disposed between said blocks in a position to roll upon said first roller and the cam face of said base-block and having gear teeth meshing with the gear teeth of said first roller and the gear teeth of said base-block.

.16. In a bilge-block, the combination of a base-block, a plate carried by the upper face of said base-block having a cam face and gear teeth, a bilge-engaging blocl pivoted to said base-block, a plate carried by the lower face of said bilge-engaging block having a cam face and gear teeth, and means to raise and lower said bilge-engagn ingblock including a roller disposed between said blocks in a position to roll upon the cam face of the plate of said bilge-en gaging block and having gear teeth meshing` with the gear teeth of said plate, a second roller disposed between said blocks in a position to roll upon said first roller and the cam face of the plate of said basablock, and having gear teeth meshing with the gear teeth of said first roller and the gear teeth of the plate of said base-block.

17. In a bilge-blocl, the combination of a base-block, a bilge-engaging block pivoted thereto, and means to raise and lower said bilge-engaging block including co-acting superimposed rollers disposed between said blocks in a position to roll upon each other and said base and bilge-engaging blocks.

18. In a bilge-block, the combination of a base-block, a bilge-engaging block pivoted thereto, said blocks provided with inclined faces directed toward each other, and means to raise and lower said bilge-engagino` block including co-acting superimposed rollers disposed between said blocks in a position to roll upon each other and the inclined faces of said blocks.

19. In a bilge-block, the combination of a base-block. a bilge-engaging block pivoted thereto. said blocks provided with inclined faces directed toward each other, and means to raise and lower said bilge-engaging block including (1o-acting superimposed rollers disposed between said blocks in a position to kroll upon each other and the inclined faces of said blocks, said. rollers having gear-connection with said blocks.

20. In a bilge-bloclr, the combination of a base-block, a bilge-engaging block pivoted thereto. said blocks provided with inclined faces directed toward each other, and means to raise and lower said bilge-engagin g block including co-acting superimposed rollers disposed between said blocks in al position to roll upon each other and the inclined faces of said blocks, said rollers having.; gear-connection with each other and with said blocks.

21. In a bilge-block, the combination of a base-block, a bilge-engaging block pivoted thereto, said blocks provided with inclined faces directed toward each other, and means to raise and lower said bilge-engaging block including co-acting superimposed rollers disposed between said blocks in a position to roll upon each other and the inclined faces of said blocks, and means to hold said rollers in a position corresponding to the raised position of said bilge-engaging block.

22. In a bilge-bloch, the combination of a base-block, a bilge-engaging block pivoted thereto, said blocks provided with inclined faces directed toward each other, and means to raise and lower said bilge-engaging block including co-acting superimposed rollers disposed between said blocks in a position to roll upon each other and the inclined faces of said blocks and means including a pawi arranged to engage one of said rollers and hold said rollers in a position corresponding to the raised position of said bilge and engaging block.

23. The combination of two pivotallyconnected blocks provided with opposed cam-faces, and means to move said blocks about their pivotal connection including a pair of superimposed rollers disposed between and in rolling engagement with each other and said opposed cam-faces, said rollers and blocks provided with intermeshing gear teeth constructed and arranged to effect the positive rotation of said rollers upon each other and over said opposed cam-faces, and means to hold said rollers in the abovedescribed relation with each other and said opposed cam-faces.

9411-. In a bilge-block, the combination of a base block, a bilge-engaging block pivoted thereto, said blocks provided with inclined faces directed toward each other, means to raise and lower said bilge-engaging block including co-acting superimposed rollers disposed between said blocks in a position to roll upon each other andthe inclined faces of said. blocks, and links pivotally connecting said rollers to each other and said blocks.

25. In a bilge-block, the combination of a base-block, a bilge-engaging block pivoted thereto, said blocks provided with inclined faces directed toward each other, and means for raising and lowering said bilge-engaging block including co-acting superimposed rollers disposed between said blocks in a position to roll upon each other and the inclined faces of said blocks, said rollers having reduced end-portions, and links pivotally received on said reduced end-portions and pivotally connected with said blocks.

26. In e bilge-block, the combination of e and on the inclined faces of said blocks, bese-block, a, bilgeeengeging block pivoted and means to drive said rollers to roll upon thereto, said blocks provided With inclined each other and the inclined faces of said 10 faces directed toward each other, and means blocks.

5 to reise and lower said huge-engaging block In testimony whereof7 I have signed my including rollers disposed between seid name to this specication. blocks in a position to roll upon each other JAMES L. CRANDALL.