GB525382A - Improvements in devices or apparatus for providing a variable speed drive - Google Patents

Improvements in devices or apparatus for providing a variable speed drive

Info

Publication number
GB525382A
GB525382A GB560939A GB560939A GB525382A GB 525382 A GB525382 A GB 525382A GB 560939 A GB560939 A GB 560939A GB 560939 A GB560939 A GB 560939A GB 525382 A GB525382 A GB 525382A
Authority
GB
United Kingdom
Prior art keywords
pulley
belts
variable
springs
sleeve
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
Application number
GB560939A
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 GB560939A priority Critical patent/GB525382A/en
Publication of GB525382A publication Critical patent/GB525382A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H9/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members
    • F16H9/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion
    • F16H9/04—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes
    • F16H9/12—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H9/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members
    • F16H9/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion
    • F16H9/04—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes
    • F16H9/12—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members
    • F16H9/16—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members using two pulleys, both built-up out of adjustable conical parts
    • F16H2009/163—Arrangements of two or more belt gearings mounted in parallel, e.g. for increasing transmittable torque
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H9/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members
    • F16H9/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion
    • F16H9/04—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes
    • F16H9/12—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members
    • F16H9/16—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members using two pulleys, both built-up out of adjustable conical parts
    • F16H2009/166—Arrangements of two or more belt gearings mounted in series, e.g. for increasing ratio coverage

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmissions By Endless Flexible Members (AREA)

Abstract

525,382. Variable-speed gearing. NEEDHAM, J. Feb. 20, 1939, No. 5609. [Class 80 (ii)] A unit for use in variable-speed expanding- pulley type of gearing comprises a pulley 21, Fig. 3, of fixed diameter secured to a sleeve 23 rotatably mounted on a shaft 12, and a variable diameter pulley comprising inter-engaging conical discs 25, 26 slidably keyed to the sleeve and subjected the pressure of springs 28, 29. Both the pulleys 21 and 25, 26 are adapted to receive V-driving belts such as 22c, 22d. In Fig. 1, a number of these units, 17, 17a &c. are arranged on parallel shafts 11, 12 in series, the variable diameter pulley of one unit driving the fixed diameter pulley of the next and the drive being taken to and from the unit by driving and driven belts 22, 22e. The shaft 12 is adapted to be displaced relatively to the shaft 11 by means of a screw 13 acting on a frame 15, 16 to increase or decrease the tension on the belts and so move the two halves of the expanding pulleys apart or allow the springs 28, 29 to bring them together to decrease or increase the effective diameters of the pulley and thus adjust the gear ratio. In a modification, the hubs of the two portions of the pulley of variable diameter have a number of opposite circumferentially spaced lugs connected by helical springs. In a further modification, suitable for wider belts, the halves of the variable diameter pulley have plain sloping faces and the loading springs are located in recesses or grooves in the hubs and in a collar secured to the sleeve. Instead of moving one of the shafts, both, 11a, 12a, Fig. 6, may be fixed and the belts adjusted by engaging pulleys at the ends of adjustable levers 58 pivoted at 59 and movable together.
GB560939A 1939-02-20 1939-02-20 Improvements in devices or apparatus for providing a variable speed drive Expired GB525382A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB560939A GB525382A (en) 1939-02-20 1939-02-20 Improvements in devices or apparatus for providing a variable speed drive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB560939A GB525382A (en) 1939-02-20 1939-02-20 Improvements in devices or apparatus for providing a variable speed drive

Publications (1)

Publication Number Publication Date
GB525382A true GB525382A (en) 1940-08-27

Family

ID=9799300

Family Applications (1)

Application Number Title Priority Date Filing Date
GB560939A Expired GB525382A (en) 1939-02-20 1939-02-20 Improvements in devices or apparatus for providing a variable speed drive

Country Status (1)

Country Link
GB (1) GB525382A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1086958B (en) * 1956-07-05 1960-08-11 Erich Schulz Epicyclic worm gear with an infinitely variable back gear

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1086958B (en) * 1956-07-05 1960-08-11 Erich Schulz Epicyclic worm gear with an infinitely variable back gear

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