US611170A - James howard - Google Patents

James howard Download PDF

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Publication number
US611170A
US611170A US611170DA US611170A US 611170 A US611170 A US 611170A US 611170D A US611170D A US 611170DA US 611170 A US611170 A US 611170A
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chain
wheel
frame
elliptical
howard
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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
    • F16H7/00Gearings for conveying rotary motion by endless flexible members
    • F16H7/08Means for varying tension of belts, ropes, or chains
    • F16H7/10Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
    • F16H7/12Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
    • F16H7/1254Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means
    • F16H7/1281Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means where the axis of the pulley moves along a substantially circular path
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62MRIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M9/00Transmissions characterised by use of an endless chain, belt, or the like
    • B62M2009/002Non-circular chain rings or sprockets
    • 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
    • F16H7/00Gearings for conveying rotary motion by endless flexible members
    • F16H7/08Means for varying tension of belts, ropes, or chains
    • F16H2007/0802Actuators for final output members
    • F16H2007/081Torsion springs
    • 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
    • F16H7/00Gearings for conveying rotary motion by endless flexible members
    • F16H7/08Means for varying tension of belts, ropes, or chains
    • F16H2007/0863Finally actuated members, e.g. constructional details thereof
    • F16H2007/0874Two or more finally actuated members
    • 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
    • F16H35/00Gearings or mechanisms with other special functional features
    • F16H2035/003Gearings comprising pulleys or toothed members of non-circular shape, e.g. elliptical gears

Description

Nu. 6ll,|70. Patented Sept. 20, I898. J. HOWARD.

DRIVING GEAR FOR BIGYGLES.

(Application filed Nov. 16, 1897.)

(No Model.)

UNITED STATES PATENT OFFICE.

JAMES HOWARD, OF LONDON, ENGLAND.

DRIVING-G EAR FOR BICYCLES.

SPECIFICATION forming part of Letters Patent No. 611,170, dated September 20, 1898. Application filed November 16, 1897. $erial No. 658,752. on; model.) Patented in England April 10, 1897, No. 9,167.

To all whom it may concern: I

Be it known that 1, JAMES HOWARD, engineer, a subject of the Queen of Great Britain, residing at 2 Sandfield Terrace, Guildford, London, in the county of Surrey, England, have invented certain new and useful Improvements in Driving-Gears for Cycles or the Like, (for which I have obtained a patent in Great Britain, No. 9,167, dated April 10, 1897,) of which the following is a specification.

The invention relates to means for taking up the slack of drivingchains when used with elliptical chain-wheels, such slackness of the chain occurring when the longer axis of the ellipse is in a horizontal position.

In order that my said invention may be particularly described and ascertained, reference is hereby made to the accompanying drawings, in which similar letters of reference indicate corresponding parts.

- Figure 1 is a front elevation of an elliptical chain-wheel fitted with my improved means for taking up the slack of the chain, Fig. 2 is a sectional plan view of same. Figs. 3 and at are diagrams serving to illustrate the action of the improved apparatus.

According to my invention I provide a triangular oscillatory frame a, suitably mounted loosely on the boss I) of the elliptical chainwheel 0 or on the axle d in such a manner that the chain-wheel c and the axle d are free to revolve in bearings in. the crank-bracket e without causinga similar action on the frame a, which remains in position between forward and backward moving portions of the chain f, Figs. 3 and 4.

The frame a,which can oscillate on the boss I) of the chain-wheel, is provided with a small chain roller or wheel g, suitably mounted on ball-bearings, and is also provided with a short arm h, carrying a small chain-guide wheel g, also mounted on ballbearings. The short arm his pivoted to the frame a at i, the short arm h being controlled in its movement pin Z, fixed in the frame to within the by a coil-spring in the box 7:, which is-arranged to exert its power outward and against the under side of the chain, the construction beingsuch that the arm h, carrying the guidewheel g, can yield on the oscillatory frame a. The motion of the short arm is limited by a formed in the short arm h.

recess m, v

The elliptical wheel may be set at any antaken up, the spring also forcingthe arm hto assumeits relative position at all other. points of the revolution. The frame a also accommodates itself to the action of the small wheels g g.

I claim- I 1. The combination with an axle, and an elliptical wheel, of an oscillatory frame carrying two chain-guide wheels, one of which is yieldingly mounted thereupon, substantially L as described.

2. The combination with an axle, and an elliptical chain-wheel, of an oscillatory frame loosely mounted in operative relation to the chain-wheel and provided with a chain-guide wheel 9 and a pivoted spring-yielding arm h carryinga chain-guide wheel g, substantially as and for the purposes described.

Dated the 24th day of September, 1897.

JAMES HOWARD.

Witnesses:

GEORGE O. DOWNING, WALTER I. SKEETEN.

US611170D James howard Expired - Lifetime US611170A (en)

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US611170A true US611170A (en) 1898-09-20

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US611170D Expired - Lifetime US611170A (en) James howard

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Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4865577A (en) * 1988-09-08 1989-09-12 Trustees Of Columbia University In The City Of New York Noncircular drive
US5221236A (en) * 1990-07-10 1993-06-22 Raymer Matthew C Belt tensioning device for belt driven bicycle
US5613918A (en) * 1995-04-06 1997-03-25 Fleischman; Daniel G. Bidirectional torque responsive belt tensioner
US20020169043A1 (en) * 2001-05-10 2002-11-14 Chieh-I Liu Elliptic gearing for a bicycle
US20030087714A1 (en) * 2001-11-06 2003-05-08 Borgwarner Inc. Tension-reducing random sprocket
US20070006836A1 (en) * 2005-07-08 2007-01-11 Schaeffler Kg Traction mechanism drive having vibration damping
EP1906052A3 (en) * 2006-09-28 2008-09-17 Delphi Technologies, Inc. Load dependent belt tensioner
US20100167857A1 (en) * 2007-06-20 2010-07-01 Borgwarner Inc. Resonance tension reducing sprocket with combined radial variation and sprocket wrap
US20100292038A1 (en) * 2007-09-28 2010-11-18 Borgwarner Inc. Multiple Tension Reducing Sprockets in a Chain and Sprocket System
EP2080932A3 (en) * 2008-01-16 2010-12-15 Bayerische Motoren Werke Aktiengesellschaft Power transmission tensioning device
US20110070986A1 (en) * 2009-09-18 2011-03-24 Gm Global Technology Operations, Inc. Drive Belt Tensioner for Motor Generator Unit
US20120252622A1 (en) * 2011-03-31 2012-10-04 Tai-Her Yang Treadle-drive eccentric wheel transmission wheel series with periodically varied speed ratio
US20140171239A1 (en) * 2012-12-18 2014-06-19 Tai-Her Yang Transmission Wheel System Series with Periodically Varied Speed Ratio and Having Reciprocally Displacing Auxiliary Pulley for Storing/Releasing Kinetic Energy
US20140171241A1 (en) * 2012-12-18 2014-06-19 Tai-Her Yang Transmission wheel series with periodically varied speed ratio and having reciprocally displacing auxiliary pulley for storing/releasing kinetic energy
US20140171240A1 (en) * 2012-12-18 2014-06-19 Tai-Her Yang Noncircular Synchronous Transmission Pulley Set Having Periodically Varying Speed Ratio and Circumference Compensating Function
US20150345597A1 (en) * 2012-12-26 2015-12-03 Litens Automotive Partnership Orbital tensioner assembly
US20160052596A1 (en) * 2011-12-06 2016-02-25 Sram, Llc Chainring
US20170146109A1 (en) * 2015-07-03 2017-05-25 Sram Deutschland Gmbh Sprocket wheel for a bicycle drive
US9719590B2 (en) 2013-06-05 2017-08-01 Sram Deutschland Gmbh Chainring
US10520066B2 (en) * 2014-06-26 2019-12-31 Litens Automotive Partnership Orbital tensioner assembly
US10703441B2 (en) 2015-07-03 2020-07-07 Sram Deutschland Gmbh Drive arrangement for a bicycle

Cited By (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990002894A1 (en) * 1988-09-08 1990-03-22 Trustees Of Columbia University Noncircular drive
US4865577A (en) * 1988-09-08 1989-09-12 Trustees Of Columbia University In The City Of New York Noncircular drive
US5221236A (en) * 1990-07-10 1993-06-22 Raymer Matthew C Belt tensioning device for belt driven bicycle
US5613918A (en) * 1995-04-06 1997-03-25 Fleischman; Daniel G. Bidirectional torque responsive belt tensioner
US20020169043A1 (en) * 2001-05-10 2002-11-14 Chieh-I Liu Elliptic gearing for a bicycle
US7654925B2 (en) 2001-11-06 2010-02-02 Borgwarner Inc. Tension-reducing random sprocket
US7125356B2 (en) 2001-11-06 2006-10-24 Borgwarner Inc. Tension-reducing random sprocket
US20060240925A1 (en) * 2001-11-06 2006-10-26 Borgwarner Inc. Tension-Reducing Random Sprocket
US8066602B2 (en) 2001-11-06 2011-11-29 Borgwarner Inc. Tension-reducing random sprocket
US20100151978A1 (en) * 2001-11-06 2010-06-17 Borgwarner, Inc. Tension-Reducing Random Sprocket
US20030087714A1 (en) * 2001-11-06 2003-05-08 Borgwarner Inc. Tension-reducing random sprocket
US20070006836A1 (en) * 2005-07-08 2007-01-11 Schaeffler Kg Traction mechanism drive having vibration damping
EP1906052A3 (en) * 2006-09-28 2008-09-17 Delphi Technologies, Inc. Load dependent belt tensioner
US20100167857A1 (en) * 2007-06-20 2010-07-01 Borgwarner Inc. Resonance tension reducing sprocket with combined radial variation and sprocket wrap
US20100292038A1 (en) * 2007-09-28 2010-11-18 Borgwarner Inc. Multiple Tension Reducing Sprockets in a Chain and Sprocket System
US8430775B2 (en) 2007-09-28 2013-04-30 Borgwarner Inc. Multiple tension reducing sprockets in a chain and sprocket system
EP2080932A3 (en) * 2008-01-16 2010-12-15 Bayerische Motoren Werke Aktiengesellschaft Power transmission tensioning device
US20110070986A1 (en) * 2009-09-18 2011-03-24 Gm Global Technology Operations, Inc. Drive Belt Tensioner for Motor Generator Unit
US9133762B2 (en) * 2009-09-18 2015-09-15 GM Global Technology Operations LLC Drive belt tensioner for motor generator unit
US20120252622A1 (en) * 2011-03-31 2012-10-04 Tai-Her Yang Treadle-drive eccentric wheel transmission wheel series with periodically varied speed ratio
US9039553B2 (en) * 2011-03-31 2015-05-26 Tai-Her Yang Treadle-drive eccentric wheel transmission wheel series with periodically varied speed ratio
US20150226293A1 (en) * 2011-03-31 2015-08-13 Tai-Her Yang Treadle-drive eccentric wheel transmission wheel series with periodically varied speed ratio
US20160052596A1 (en) * 2011-12-06 2016-02-25 Sram, Llc Chainring
US9650107B2 (en) 2011-12-06 2017-05-16 Sram, Llc Chainring
US9493211B2 (en) * 2011-12-06 2016-11-15 Sram, Llc Chainring
US20160121966A1 (en) * 2011-12-06 2016-05-05 Sram, Llc Chainring
US9862456B2 (en) * 2011-12-06 2018-01-09 Sram, Llc Chainring
US20160052597A1 (en) * 2011-12-06 2016-02-25 Sram, Llc Chainring
US20160052599A1 (en) * 2011-12-06 2016-02-25 Sram, Llc Chainring
US9731791B2 (en) * 2011-12-06 2017-08-15 Sram, Llc Chainring
US9731790B2 (en) * 2011-12-06 2017-08-15 Sram, Llc Chainring
US9255629B2 (en) * 2012-12-18 2016-02-09 Tai-Her Yang Transmission wheel series with periodically varied speed ratio and having reciprocally displacing auxiliary pulley for storing/releasing kinetic energy
US9243691B2 (en) * 2012-12-18 2016-01-26 Tai-Her Yang Noncircular synchronous transmission pulley set having periodically varying speed ratio and circumference compensating function
US9169903B2 (en) * 2012-12-18 2015-10-27 Tai-Her Yang Transmission wheel system series with periodically varied speed ratio and having reciprocally displacing auxiliary pulley for storing/releasing kinetic energy
US20140171239A1 (en) * 2012-12-18 2014-06-19 Tai-Her Yang Transmission Wheel System Series with Periodically Varied Speed Ratio and Having Reciprocally Displacing Auxiliary Pulley for Storing/Releasing Kinetic Energy
US20140171241A1 (en) * 2012-12-18 2014-06-19 Tai-Her Yang Transmission wheel series with periodically varied speed ratio and having reciprocally displacing auxiliary pulley for storing/releasing kinetic energy
US20140171240A1 (en) * 2012-12-18 2014-06-19 Tai-Her Yang Noncircular Synchronous Transmission Pulley Set Having Periodically Varying Speed Ratio and Circumference Compensating Function
EP3611401A1 (en) 2012-12-26 2020-02-19 Litens Automotive Partnership Orbital tensioner assembly
US9709137B2 (en) * 2012-12-26 2017-07-18 Litens Automotive Partnership Orbital tensioner assembly
US20150345597A1 (en) * 2012-12-26 2015-12-03 Litens Automotive Partnership Orbital tensioner assembly
US10309497B2 (en) * 2012-12-26 2019-06-04 Litens Automotive Partnership Orbital tensioner assembly
US9719590B2 (en) 2013-06-05 2017-08-01 Sram Deutschland Gmbh Chainring
US10520066B2 (en) * 2014-06-26 2019-12-31 Litens Automotive Partnership Orbital tensioner assembly
US20170146109A1 (en) * 2015-07-03 2017-05-25 Sram Deutschland Gmbh Sprocket wheel for a bicycle drive
US10578201B2 (en) * 2015-07-03 2020-03-03 Sram Deutschland Gmbh Sprocket wheel for a bicycle drive
US10703441B2 (en) 2015-07-03 2020-07-07 Sram Deutschland Gmbh Drive arrangement for a bicycle

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