US103971A - Improvement in mechanical movement - Google Patents

Improvement in mechanical movement Download PDF

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US103971A
US103971A US103971DA US103971A US 103971 A US103971 A US 103971A US 103971D A US103971D A US 103971DA US 103971 A US103971 A US 103971A
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lever
mechanical movement
improvement
rods
points
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H21/00Gearings comprising primarily only links or levers, with or without slides
    • F16H21/10Gearings comprising primarily only links or levers, with or without slides all movement being in or parallel to a single plane
    • F16H21/44Gearings comprising primarily only links or levers, with or without slides all movement being in or parallel to a single plane for conveying or interconverting oscillating or reciprocating motions
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/18Mechanical movements
    • Y10T74/18856Oscillating to oscillating

Description

N, BRADFORD.- MECHANICAL MOVEMENT.

No. 103,971. Patented June '7, 1870.

idnitmi tatrt NATHANIEL BRADFORD, or ADDISON, MAINE.

Letters Patent No. 103,971, dated June 7, 1870.

IMPROVEMENT IN MECHANICAL MOVEMENT.

The Schedule referred to lII t hQIQ Letters Patent and making part of the lame.

To all whom t't may concern Be ,it known that I, NATHANIEL BRADFORD, of Addison, in the county of -Washington and State of I Maine, have invented a new and improved Mechanical Movement; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawing forminga part of this specification, in which the figure is a side elevation. I

This invention relates to the application of lever power to the performance of any mechanical function.

The invention has for its object the proportioning of power to resistance in such manner that when resistance is small, power may be reduced in order to the gaining of speed, and when resistance is great, power may be increased by the sacrifice of speed.

In the drawing-- A, a section of the deckof a ship., a, a standard rising therefrom. b, a lever, pivoted, at its center in a recess in the standard a, and having orifices in its ends, in which to insert the-extremities of handles e, by which the lever is worked.

d, a second lever, pivoted at its center in the recess in the standard a, above the lever 12, and likewise provided with orifices in its ends for the insertion of the handles 0.

e care inclined rods at opposite sides of the standard a, jointed at their upper extremities to the lever 11 and at their lower extremities to the lever b. The distances from the fulcrum of the lever b to the points where the rods are connected with said lever are twice as great as the distances from the fulcrum of the lever d to the points of connection of the rods with it. From the lower lever, connection is made by rods at each side of the standard with a Windlass or pump below, which Windlass is worked bymoving the lever up and down through the instrumentality of the handles.

When the weight to be raised by said Windlass is comparatively light, the handles are applied to the ends of the 'lower lever, in which the points of resistance are at h h, and by which the windlass may be rotated rapidly. But when the weight is comparatively heavy, the handles should be shifted to the orifice in the ends of the upper lever, in which the points of resistance, which are the points of connection with the rods e, are twice as near the fulcrum as in the lever l). The efi'eotis, therefore, twice as great when the same power which was applied to the lever 11 is applied to the lever (I, while the speed of the windlass is reduced about one-third. I

I have found by actual. experiment that this apparatus only works well when the levers lid-are inclined away fi'om each other at each side of the standard a, as shown in the drawing. I do not, however, limit myself to the levers when thus inclined, but propose to cover them when straight, as well.

Having thus described my invention,

What I claim'as new, and desire to secure by Letters Patent, is-- p The combination of the levers b d, pivoted in the standard a, with the rods 0, when the distances from the fulcrum of one lever to the points of its connection with the rods are less than the distances from the fulcrum of the other lever. to. the points of its connection with the rods, substantially as and for the purpose described.

NATHL. BRADFORD.

Witnesses:

CHAS. -A. PETTIT, Tnos. D. D. OURAND.

US103971D Improvement in mechanical movement Expired - Lifetime US103971A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4567782A (en) * 1981-04-06 1986-02-04 General Dynamics Pomona Division Compound parallelogram four-bar linkage
US20060002930A1 (en) * 2004-04-16 2006-01-05 Genentech, Inc. Treatment of disorders

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4567782A (en) * 1981-04-06 1986-02-04 General Dynamics Pomona Division Compound parallelogram four-bar linkage
US20060002930A1 (en) * 2004-04-16 2006-01-05 Genentech, Inc. Treatment of disorders

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