DE36667C - Differential pulley - Google Patents

Differential pulley

Info

Publication number
DE36667C
DE36667C DENDAT36667D DE36667DA DE36667C DE 36667 C DE36667 C DE 36667C DE NDAT36667 D DENDAT36667 D DE NDAT36667D DE 36667D A DE36667D A DE 36667DA DE 36667 C DE36667 C DE 36667C
Authority
DE
Germany
Prior art keywords
pulley
rope
loose
fixed
around
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 - Lifetime
Application number
DENDAT36667D
Other languages
German (de)
Original Assignee
J. ZIMMERMANN in Aachen, Eynattenerstr. 73
Publication of DE36667C publication Critical patent/DE36667C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00Portable or mobile lifting or hauling appliances
    • B66D3/12Chain or like hand-operated tackles with or without power transmission gearing between operating member and lifting rope, chain or cable
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00Portable or mobile lifting or hauling appliances
    • B66D3/04Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
    • B66D3/06Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage with more than one pulley
    • B66D3/10Applications of braking or detent devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Description

Hierzu ι Blatt Zeichnungen.For this purpose ι sheet of drawings.

BERLIN. GEDRUCKT IN DER REECHSDRUCKEREI.BERLIN. PRINTED IN THE LEGAL PRINTING.

Claims (1)

KAISERLICHESIMPERIAL PATENTAMT.PATENT OFFICE. KLASSE 3B: Hebezeuge.CLASS 3B: Hoists. Dieser Differential - Flaschenzug besteht aus einer festen Rolle A mit zwei an Hebeln befestigten Druckrollen B, einer losen Rolle C und einem Seil ohne Ende, Fig. 1, 2 und 3 der Zeichnung. Letzteres wird folgendermafsen um die feste und um die lose Rolle geführt. Vom Punkte a, Fig. 1 und 2, ausgehend, geht das Seil zunächst über die feste Rolle A, dann um die lose Rolle C, von dort nochmals um die feste Rolle A, sich über das Seil legend, und zurück zum Anfangspunkt a. This differential pulley block consists of a fixed pulley A with two pressure pulleys B attached to levers, a loose pulley C and a rope without an end, FIGS. 1, 2 and 3 of the drawing. The latter is guided around the fixed and loose roll as follows. Starting from point a, Fig. 1 and 2, the rope first goes over the fixed pulley A, then around the loose pulley C, from there again around the fixed pulley A, laying over the rope, and back to the starting point a. Der Flaschenzug wird an den beiden Haken c aufgehängt, Fig. 1 und 2. Diese Haken c sind bei d mit den um den Bolzen b drehbaren Winkelhebeln d b e verbunden. Die beiden Druckrollen B sind bei e an den Hebelarmen b e drehbar angeordnet. Dieselben werden durch die Eigenlast des Flaschenzuges, sowie durch die Last Q fest gegen das auf der Rolle A doppelt auf einander liegende Seil gedrückt und verhindern dadurch das Aneinandervorbeigleiten sowie das Abspringen der beiden Seiltheile von der Rolle A; ferner bewirken sie eine Selbstsperrung des Flaschenzuges beim Nachlassen der Kraft P. The pulley block is suspended from the two hooks c , FIGS. 1 and 2. These hooks c are connected at d to the angle levers dbe rotatable about the bolt b . The two pressure rollers B are e on the lever arms be rotatably disposed. The same are pressed by the dead weight of the block and tackle as well as by the load Q firmly against the rope lying double on one another on the pulley A and thereby prevent the two parts of the rope from sliding past each other and the two parts of the rope from jumping off the pulley A; they also cause the pulley system to lock itself when the force P. Handhung und Wirkung dieses Differential-Flaschenzuges sind folgendermafsen: Soll eine Last Q. gehoben werden, so läfst man eine entsprechend starke Kraft P an den losen Theil des endlosen Seiles in der in der Zeichnung, Fig. ι und 2, bezeichneten Richtung wirken. Das theoretische Verhältnifs zwischen Last Q. und Kraft P ist dann folgendes: Bezeichnet man den Radius der festen Rolle A mit R und den Durchmesser des Seiles mit ^1, so ergiebt sich folgende Gleichung für den Gleichgewichtszustand zwischen Kraft und Last am Flaschenzuge:The operation and effect of this differential pulley block are as follows: If a load Q. is to be lifted, a correspondingly strong force P is allowed to act on the loose part of the endless rope in the direction indicated in the drawing, FIGS. 1 and 2. The theoretical relationship between load Q. and force P is then as follows: If one denotes the radius of the fixed pulley A with R and the diameter of the rope with ^ 1 , the following equation results for the state of equilibrium between force and load on the pulley block: P(R + dj + A R- A (JK + dj = ο P (R + dj + A R- A (JK + dj = ο 2t £12t £ 1 P(R+dJ:P (R + dJ: l1-R)l 1 -R) 2 R + Cl1 2 R + Cl 1 Paten τ-An sp ruch:Sponsorship τ claim: Construction eines Differential-Flaschenzuges, bestehend aus einer einfachen festen Rolle mit zwei an Hebeln wirkenden Druckrollen, einer losen Rolle und einem um die feste Rolle zweimal, und zwar über einander, und um die lose Rolle einmal geführten Seil ohne Ende.Construction of a differential pulley system consisting of a simple fixed pulley with two pressure rollers acting on levers, one loose roller and one around the fixed roller twice, over each other, and around the loose pulley once without end of rope.
DENDAT36667D Differential pulley Expired - Lifetime DE36667C (en)

Publications (1)

Publication Number Publication Date
DE36667C true DE36667C (en)

Family

ID=312469

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT36667D Expired - Lifetime DE36667C (en) Differential pulley

Country Status (1)

Country Link
DE (1) DE36667C (en)

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