DE440203C - Folding davit with screw gear - Google Patents

Folding davit with screw gear

Info

Publication number
DE440203C
DE440203C DED48946D DED0048946D DE440203C DE 440203 C DE440203 C DE 440203C DE D48946 D DED48946 D DE D48946D DE D0048946 D DED0048946 D DE D0048946D DE 440203 C DE440203 C DE 440203C
Authority
DE
Germany
Prior art keywords
screw
screw gear
folding
davit
folding davit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DED48946D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WELIN DEUTSCHE GmbH
Original Assignee
WELIN DEUTSCHE GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by WELIN DEUTSCHE GmbH filed Critical WELIN DEUTSCHE GmbH
Priority to DED48946D priority Critical patent/DE440203C/en
Application granted granted Critical
Publication of DE440203C publication Critical patent/DE440203C/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B23/00—Equipment for handling lifeboats or the like
    • B63B23/02—Davits, i.e. devices having arms for lowering boats by cables or the like
    • B63B23/18—Davits, i.e. devices having arms for lowering boats by cables or the like with arms pivoting on substantially vertical axes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Transmission Devices (AREA)

Description

Klappdavit mit Schraubengetriebe. Gegenstand der Erfindung ist eine Verbesserung des durch das Hauptpatent 431194 geschützten Schraubengetriebes, für Klappdavits.Folding davit with screw gear. The invention is a Improvement of the screw gear protected by the main patent 431194, for Folding davits.

Bei dem Schraubengetriebe gemäß dem Hauptpatent ist die Schraubenspindel mit Rechts- und Linksgewinde versehen, die in um ihre Längsachse nicht drehbaren Muttern drehbar sind, von denen die eine am Davitbock gelagert ist, während die andere an einem die Bewegung auf den Davitarm übertragenden Teile sitzt.In the screw drive according to the main patent, the screw spindle is provided with right-hand and left-hand threads, which cannot be rotated about their longitudinal axis Nuts are rotatable, one of which is mounted on the davit, while the others are seated on a part that transmits the movement to the davit arm.

Bei dieser Anordnung hat sich der Nachteil ergeben, daß ein Teil der Schraubenspindel über den Davitbock hinaus erheblich nach dem Deck hin vorspringt und dort den Verkehr hindert. Zur Beseitigung dieses Übelstandes ist es erwünscht, diesen Teil der Schraubenspindel so kurz wie möglich zu machen. Dies wird gemäß der Erfindung dadurch erreicht, daß man in diesem Teil dem Gewinde eine möglichst niedrige Steigung gibt, die z. B. etwa i@,(, cm betragen kann, während in dem entgegengesetzt gerichteten Gewinde des der Bordwand zugekehrten Teiles der Schraubenspindel die Steigung wesentlich größer sein und z. B. 1,75 bis a,25 cm betragen kann, da es hier nicht notwendig ist, daß die Schraube selbsthemmend ist. Die Anzahl der Schraubenwindungen muß in beiden Gewindeteilen gleich sein.In this arrangement, there has been the disadvantage that part of the The screw spindle protrudes significantly towards the deck beyond the davit bracket and obstructs traffic there. To remedy this problem, it is desirable to make this part of the screw spindle as short as possible. This is done according to the invention achieved that in this part of the thread a possible low slope, the z. B. can be about i @, (, cm, while in the opposite directed thread of the part of the screw spindle facing the side wall Slope be much larger and z. B. 1.75 to a, 25 cm, since it it is not necessary here for the screw to be self-locking. The number of turns of the screw must be the same in both parts of the thread.

Claims (2)

PATENTANSPRIJC11E: i. Schraubengetriebe für Klappdavits, dessen Schraubenspindel mit zwei entgegengesetzten Gewinden versehen ist, nach Patent 431194, dadurch gekennzeichnet, daß die Steigung der beiden Gewinde bei gleicher Anzahl der Schraubenwindungen verschieden groß ist. PATENT CLAIMS: i. Screw gear for folding davits, its screw spindle is provided with two opposite threads, according to patent 431194, characterized in that that the pitch of the two threads is different for the same number of screw turns is great. 2. Schraubengetriebe nach Anspruch i, dadurch gekennzeichnet, daß die Steigung in dem zur Schiffsmittelebene gerichteten Gewindeteil niedriger ist als in dem nach außen gerichteten.2. Screw gear according to claim i, characterized in that the The pitch in the thread part directed towards the ship's median plane is lower than in the outward one.
DED48946D 1925-10-13 1925-10-13 Folding davit with screw gear Expired DE440203C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED48946D DE440203C (en) 1925-10-13 1925-10-13 Folding davit with screw gear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED48946D DE440203C (en) 1925-10-13 1925-10-13 Folding davit with screw gear

Publications (1)

Publication Number Publication Date
DE440203C true DE440203C (en) 1927-01-29

Family

ID=7051538

Family Applications (1)

Application Number Title Priority Date Filing Date
DED48946D Expired DE440203C (en) 1925-10-13 1925-10-13 Folding davit with screw gear

Country Status (1)

Country Link
DE (1) DE440203C (en)

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