US642874A - Pedal-crank driving-gear for velocipedes. - Google Patents

Pedal-crank driving-gear for velocipedes. Download PDF

Info

Publication number
US642874A
US642874A US72660799A US1899726607A US642874A US 642874 A US642874 A US 642874A US 72660799 A US72660799 A US 72660799A US 1899726607 A US1899726607 A US 1899726607A US 642874 A US642874 A US 642874A
Authority
US
United States
Prior art keywords
pedal
crank
gear
velocipedes
cam
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
US72660799A
Inventor
Joseph Roe Park
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to US72660799A priority Critical patent/US642874A/en
Application granted granted Critical
Publication of US642874A publication Critical patent/US642874A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M3/00—Construction of cranks operated by hand or foot
    • B62M3/02—Construction of cranks operated by hand or foot of adjustable length
    • B62M3/04—Construction of cranks operated by hand or foot of adjustable length automatically adjusting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M3/00—Construction of cranks operated by hand or foot
    • B62M3/08—Pedals
    • B62M3/083—Toe clip
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2164—Cranks and pedals
    • Y10T74/2167—Variable
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2164—Cranks and pedals
    • Y10T74/2168—Pedals
    • Y10T74/217—Pedals with toe or shoe clips

Definitions

  • This invention relates to an improved pedal-crank dri ving-gear for velocipedes; and it has for its object to automatically increase the effective throw of the cranks during a part of each revolution, so as to obtain an increased leverage during the operative part of the stroke.
  • Figure 1 is a view in side elevation.
  • Fig. 2 is a view in front elevation.
  • Fig. 3 is a view showing a modification, and
  • Fig. 4 is a diagrammatic view showing the approximate positions of the pedal during a complete rotation of the crank.
  • each of the cranks A which are of the ordinary type, is fixed a pin B, on which is rigidly mounted a cam O, forming an extension of the crank.
  • a pin B On the pin B are loosely mounted, preferably by means of ballbearings, as shown, a pair of arms or links D D, which are pivotally attached directly or indirectly at their other ends cl to a plate E, forming the pedal.
  • This plate is provided with side guides c, a rear toothed plate 6, and front toe-guard e
  • the pedal-plate E takes a bearing and rests on the cam O or on a renewable plate a, so fixed on the under side of the said plate that it may be renewed when worn.
  • the cam may be formed of a single plate or the pedal-plate E bears on the cam O in such a position as to give the greatest leverage of the crank and that at the end of the effective.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Toys (AREA)

Description

Patented Feb. 6, I900.
J. R. PARK.
PEDAL CRANK DRIVING GEAR FOR YELOCIPEDES. (Application filed Aug. 8, 1899.) (No Model.)
INVENTOR.
WiTNESSES.
NIIED STATES IATENT' OFFICE.
JOSEPH ROE PARK, OF NORWICH, ENGLAND.
PEDAL-CRANK DRIVING-GEAR FOR VELOCIPEDES.
SPECIFICATION forming part of Letters Patent No. 642,874, dated February 6, 1900. Application filed August 8, 1899. Serial No. 726,607. (No model.)
To all whom, it may concern:
Be it known that I, JOSEPH ROE PARK, a subject of the Queen of Great Britain, residing at Norwich, in the county of Norfolk, England, have invented a new and useful Improvement in Pedal-Crank Driving-Gear for Velocipedes, (for which I have obtained a patent in Great Britain, No. 625, bearing date the 10th of January, 1899,) of which the following is a full and complete specification.
This invention relates to an improved pedal-crank dri ving-gear for velocipedes; and it has for its object to automatically increase the effective throw of the cranks during a part of each revolution, so as to obtain an increased leverage during the operative part of the stroke.
In the accompanying drawings, which illustrate one method of carrying this invention into practice, Figure 1 is a view in side elevation. Fig. 2 is a view in front elevation. Fig. 3 is a view showing a modification, and Fig. 4 is a diagrammatic view showing the approximate positions of the pedal during a complete rotation of the crank.
Similar letters refer to si milar parts throughout the several views.
On the end of each of the cranks A, which are of the ordinary type, is fixed a pin B, on which is rigidly mounted a cam O, forming an extension of the crank. On the pin B are loosely mounted, preferably by means of ballbearings, as shown, a pair of arms or links D D, which are pivotally attached directly or indirectly at their other ends cl to a plate E, forming the pedal. This plate is provided with side guides c, a rear toothed plate 6, and front toe-guard e The pedal-plate E takes a bearing and rests on the cam O or on a renewable plate a, so fixed on the under side of the said plate that it may be renewed when worn.
At present I am making the cam E of hard wood; but it will be obvious that it may be made of other material without departing from the spirit and scope of my invention.
The cam may be formed of a single plate or the pedal-plate E bears on the cam O in such a position as to give the greatest leverage of the crank and that at the end of the effective.
part of the stroke the said pedal-plate bears on the cam, so as to give the least leverage of the crank, the intermediate positions being gradually obtained by reason of the curved parts of the cam between these two points.
It will be obvious that the exact position of the cam with respect to the crank will vary according to the increased amount of leverage desired during the operative part of the stroke of the crank and also that the exact shape of the cam will require to be varied according to the amount of ankle action employed by the rider.- In the diagram shown by Fig. at the pedal-plate is shown in the approximate positions it will assume if the rider uses his ankle action most effectively.
What I claim, and desire to secure by Letters Patent, is
The combination, with a crank-arm provided with a laterally-projecting pin at its free end, of a cam secured to the crank-arm eccentric of the said pin, a link journaled on the said pin, and a pedal-plate pivoted to the free end portion of the said link and bearing on the said cam, substantially as set forth.
JOSEPH ROE PARK.
US72660799A 1899-08-08 1899-08-08 Pedal-crank driving-gear for velocipedes. Expired - Lifetime US642874A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US72660799A US642874A (en) 1899-08-08 1899-08-08 Pedal-crank driving-gear for velocipedes.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US72660799A US642874A (en) 1899-08-08 1899-08-08 Pedal-crank driving-gear for velocipedes.

Publications (1)

Publication Number Publication Date
US642874A true US642874A (en) 1900-02-06

Family

ID=2711457

Family Applications (1)

Application Number Title Priority Date Filing Date
US72660799A Expired - Lifetime US642874A (en) 1899-08-08 1899-08-08 Pedal-crank driving-gear for velocipedes.

Country Status (1)

Country Link
US (1) US642874A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5078026A (en) * 1989-01-04 1992-01-07 Giffin Brian K Bicycle pedal orientation device
US5707322A (en) * 1994-02-28 1998-01-13 Concept Ii, Inc. Exercise machine
US6231485B1 (en) 1994-02-28 2001-05-15 Concept Ii, Inc. Exercise machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5078026A (en) * 1989-01-04 1992-01-07 Giffin Brian K Bicycle pedal orientation device
US5707322A (en) * 1994-02-28 1998-01-13 Concept Ii, Inc. Exercise machine
US6231485B1 (en) 1994-02-28 2001-05-15 Concept Ii, Inc. Exercise machine
US6371892B1 (en) * 1994-02-28 2002-04-16 Concept Ii, Inc. Exercise machine

Similar Documents

Publication Publication Date Title
US631276A (en) Bicycle-crank.
US642874A (en) Pedal-crank driving-gear for velocipedes.
US1505271A (en) Bicycle
US667594A (en) Driving mechanism for bicycles.
US573230A (en) Gearing for bicycles
US1089483A (en) Bicycle propelling mechanism.
US351880A (en) Nelson meeeill
US457290A (en) phillips
US651316A (en) Bicycle propelling mechanism.
US636658A (en) Driving mechanism for velocipedes.
US589728A (en) james
US588198A (en) Grove
US599689A (en) crandall
US564797A (en) Robert s
US544165A (en) George a
US655011A (en) Power-machine.
US607532A (en) Power mechanism for bicycles
US621136A (en) Julius alexander nicolaj rasmussen and charles benton hart
US564194A (en) Alexander
US609828A (en) Velocipede
US1020299A (en) Pedal mechanism for bicycles.
US625600A (en) Driving-gear for bicycles
US608936A (en) Bicycle
US689050A (en) Propelling mechanism.
US615158A (en) Philipp goldmann