US596289A - William thomas smith - Google Patents

William thomas smith Download PDF

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US596289A
US596289A US596289DA US596289A US 596289 A US596289 A US 596289A US 596289D A US596289D A US 596289DA US 596289 A US596289 A US 596289A
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wheel
chain
elliptical
driving
william thomas
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    • 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
    • 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

(N0 Model.)

W. T. SMITH. DRIVING GEAR FOR VELOGIBEDBS.

No. 596,289. Patented Deo. 28,1897.

WILLIAM THOMAS SMITH, OF BOLTON, ENGLAND.

DRIVING-G EAR FOR VELOC-IPEDES.

SPECIFICATION forming part of Letters Patent No. 596,289, dated December 28, 1897. Application tiled August 31, 1896. Serial No. 604,372. (No model.)

To LZZ whom t may concern.:

Be it known that I, WILLIAM 'IrtoivrAsv SMITH, a subject of the Queen of Great Britcaster county, England, have invented certain new and Improved Driving-Gear for Velocipedes, of which the following description is a specification.'

In connection withA the driving-gear of ve-` cle more evenly throughout the entirety of\ each revolution of the crank without entailing the use of mechanism which will greatly add to the cost of production of the velocipede or which will engender other disadvantages is the object of this invention, and this object I attain by the employment of the mechanism illustrated by the accompanying sheets of drawings, in which- Figure l is a part sectional elevation of such a portion of a velocipede with my improved driving-gear applied thereto as is necessary to show how the latter may be put into use. Figs. 2 and 3 are similar views to Fig. l, but show in each case the employment of only one guide-pulley, the same being mounted to guide the chain in itsupper and lower paths,

`parts throughout the several views.

B indicates portions vof the velocipedes framework upon which the crank-spindle a and the spindle b of the velocipedes drivingwheel f are mounted, while c' are the cranks fixed to said spindle aand carrying the pedals dl On the spindle a I fix the well-known elliptical driving-wheel e, its larger diameter being at or about right angles to the radial arms or cranks c. Thus when these cranks c arein position for the rider to have the greatest power over them this power or force will at this time be transmitted by the chain g to the'driving-wheel f through the greater diameter of the elliptical wheel e in a manner vcircular driving-wheel is employed, I secure an ordinary sprocket-wheel h on the hub lof Ithe rear wheel, whileguideepulleys p p',

mounted to revolve on fixed bearings qq', are arranged in such positions relatively with the wheel c as to keep the chain gat its proper' tension, this position being clearly deiined as the center of the arc 3 4, (shown in broken lines, Fig. 1,) which bisects the horizontal planes in which the chain g travels and the vertical plane through the spindle a. Thus the slight variations in the tension of the chain g are represented by the distance that said arc 3 4 passes out of the vertical linel 2. In other Words, each of the Wheels p or p is so situated in its fixed location that although it delects the chain but slightly, if at all, when the longer radii of the elliptical wheel are at a right angle to the path of movement of the Wheel it materially deflects said chain when the shorter radii of the elliptical wheel are at a right angle to said path of movement. This will be evident by referring to Fig. 1, from which iigure it will be clear that if theguide-wheels Were omitted the chain would be very slack or loose when the ellip- However, when this ellipl tical 'Wheel is in the position indicated by full lines in said ligure. Again, I iind that one guide-wheel p, as shown by Fig. 2, or one, p', as shown by Fig. 5, is quite suicient to maintain the chain g in its proper positions on the wheels e h', and either or any of these devices may be employed when the wheel e has a circumference greater or less than twice that of the wheel 7L.

Having thus described the nature and object of my invention, what I consider new, and therefore claim, is-

l. In a velocipede, the combination of an elliptical driving chain-wheel, a concentric driven chain-Wheel, a chain connecting them, and a concentric guide-wheel mounted to re- IOO volve on iixed bearings, the outer portion of the periphery of the guide-Wheel being situated outside of a line drawn from the periphery of the concentric driven Wheel to the shorter radius of the elliptical Wheel, Whereby the path of movement of the chain is de- Iiected more or less according to Whether the shorter or the longer `radius respectively of the elliptical Wheel is at a substantial right angle to said path of movement.

2. In a velocipede, the combination of an elliptical driving chain-Wheel, a concentric driven chain-Wheel, a chain connecting them, and a pair of concentric guide-Wheels, one for each stretch of the chain and mounted to revolve on fixed bearings, each of said guide- Wheels having the outer portion of its periphery situated outside of aline drawn from the periphery of the concentric driven wheel to the shorter radius of the elliptical Wheel, whereby the path of movement of the chain is deflected more orless according to whether the shorter or the longer radii respectively of the elliptical Wheel are at a substantial right angle to said path of movement.

XVILLIAM THOMAS SWITIT.

lVitnesseS:

JOHN WHITEHEAD, SAMUEL HEY.

US596289D William thomas smith Expired - Lifetime US596289A (en)

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Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3259398A (en) * 1964-12-09 1966-07-05 Green William P Bicycle drive
US4133550A (en) * 1976-03-18 1979-01-09 Brown Lawrence G Bicycle and power transmission system
US5882025A (en) * 1991-11-22 1999-03-16 Runnels; David J. Bicycle with rhombus-like gear with circularly curved apexes
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
US20060211529A1 (en) * 2005-03-15 2006-09-21 Rotor Componentes Tecnologicos S.I Ovoid chainrings for optimising conventional pedaling
WO2007003263A1 (en) 2005-07-05 2007-01-11 Schaeffler Kg Continuous belt drive
US20070096503A1 (en) * 2004-02-19 2007-05-03 Daniel Borleis Hinge device
US20070246908A1 (en) * 2006-04-21 2007-10-25 Ming-Tsan Shu Chain wheel for bicycle
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
US20120252613A1 (en) * 2011-03-31 2012-10-04 Tai-Her Yang Treadle-drive elliptical wheel transmission wheel series with periodically varied speed ratio
US20120252622A1 (en) * 2011-03-31 2012-10-04 Tai-Her Yang Treadle-drive eccentric wheel transmission wheel series with periodically varied speed ratio
US20130130851A1 (en) * 2011-03-31 2013-05-23 Tai-Her Yang Treadle-drive eccentric wheel transmission wheel series with periodically varied speed ratio
US20130281239A1 (en) * 2010-07-23 2013-10-24 Rotor Componentes Tecnologicos S.L. Attachment of an ovoid chainring
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
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
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
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

Cited By (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3259398A (en) * 1964-12-09 1966-07-05 Green William P Bicycle drive
US4133550A (en) * 1976-03-18 1979-01-09 Brown Lawrence G Bicycle and power transmission system
US5882025A (en) * 1991-11-22 1999-03-16 Runnels; David J. Bicycle with rhombus-like gear with circularly curved apexes
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
US20030087714A1 (en) * 2001-11-06 2003-05-08 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
US20100151978A1 (en) * 2001-11-06 2010-06-17 Borgwarner, Inc. Tension-Reducing Random Sprocket
US8066602B2 (en) 2001-11-06 2011-11-29 Borgwarner Inc. Tension-reducing random sprocket
US7520028B2 (en) * 2004-02-19 2009-04-21 Gm Global Technology Operations, Inc. Hinge device
US20070096503A1 (en) * 2004-02-19 2007-05-03 Daniel Borleis Hinge device
US20060211529A1 (en) * 2005-03-15 2006-09-21 Rotor Componentes Tecnologicos S.I Ovoid chainrings for optimising conventional pedaling
US7749117B2 (en) * 2005-03-15 2010-07-06 Rotor Components Technologies, S.L. Ovoid chainrings for optimising conventional pedaling
WO2007003263A1 (en) 2005-07-05 2007-01-11 Schaeffler Kg Continuous belt drive
US20070246908A1 (en) * 2006-04-21 2007-10-25 Ming-Tsan Shu Chain wheel for bicycle
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
US20130281239A1 (en) * 2010-07-23 2013-10-24 Rotor Componentes Tecnologicos S.L. Attachment of an ovoid chainring
US9005062B2 (en) * 2010-07-23 2015-04-14 Rotor Componentes Technologicos S.L. Attachment of an ovoid chainring
US9039553B2 (en) * 2011-03-31 2015-05-26 Tai-Her Yang Treadle-drive eccentric wheel transmission wheel series with periodically varied speed ratio
US20120252613A1 (en) * 2011-03-31 2012-10-04 Tai-Her Yang Treadle-drive elliptical wheel transmission wheel series with periodically varied speed ratio
US20130130851A1 (en) * 2011-03-31 2013-05-23 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
US20120252622A1 (en) * 2011-03-31 2012-10-04 Tai-Her Yang Treadle-drive eccentric wheel transmission wheel series with periodically varied speed ratio
US9731790B2 (en) * 2011-12-06 2017-08-15 Sram, Llc Chainring
US9731791B2 (en) * 2011-12-06 2017-08-15 Sram, Llc Chainring
US9650107B2 (en) 2011-12-06 2017-05-16 Sram, Llc Chainring
US20160052599A1 (en) * 2011-12-06 2016-02-25 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
US20160052597A1 (en) * 2011-12-06 2016-02-25 Sram, Llc Chainring
US20160052596A1 (en) * 2011-12-06 2016-02-25 Sram, Llc Chainring
US9862456B2 (en) * 2011-12-06 2018-01-09 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
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
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
US9719590B2 (en) 2013-06-05 2017-08-01 Sram Deutschland Gmbh Chainring
US20170146109A1 (en) * 2015-07-03 2017-05-25 Sram Deutschland Gmbh Sprocket wheel for a bicycle drive

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