GB757405A - Change-speed mechanism - Google Patents

Change-speed mechanism

Info

Publication number
GB757405A
GB757405A GB3127253A GB3127253A GB757405A GB 757405 A GB757405 A GB 757405A GB 3127253 A GB3127253 A GB 3127253A GB 3127253 A GB3127253 A GB 3127253A GB 757405 A GB757405 A GB 757405A
Authority
GB
United Kingdom
Prior art keywords
segments
belt
wheel
engage
pulley
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
GB3127253A
Inventor
Arthur Shortland
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.)
Mellor Bromley and Co Ltd
Original Assignee
Mellor Bromley and Co Ltd
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 Mellor Bromley and Co Ltd filed Critical Mellor Bromley and Co Ltd
Priority to GB3127253A priority Critical patent/GB757405A/en
Publication of GB757405A publication Critical patent/GB757405A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

757,405. Change-speed gearing. MELLOR BROMLEY & CO., Ltd. Nov. 8, 1954 [Nov. 11, 1953], No. 31272/53. Class 80(2) An expanding gear wheel, pulley or sprocket comprises pairs of segments moved axially together, one after another, on a rotating member, to a position in which they engage a drive transmitting member such as a belt, chain or gear, to increase the effective diameter of the rotating member, and to another position in which they are out of engagement with the belt, &c., which then engages the rotating member directly. In the form shown in Figs. 9-11 arcuate segments 6 of channel cross-section engage a belt 3 and are mounted on pins 18 sliding in slots in the outer flange 12 of a rotating hub member 1. Each segment carries a bracket 22 passing through another slot in the flange 12 and secured to a rack 19 meshing a pinion 17 fast with a cam 15, having shoulders 16 and rotating about a pin 14. Pivoted levers 28, 29, connected by a link 27 and mounted on a stationary support, are mounted so that one or other of them can engage a cam shoulder 16, according to which way they are tilted, and thus, as the wheel rotates, engage each of the cams 15 in sequence. The pinions 17 are accordingly turned, and, through the rack and pinion gearing, cause the segments 6 to be moved towards or away from each other, to increase or decrease the effective diameter of the wheel. The levers 28, 29 are arranged in such a position that they cause the segments 6 to move immediately before the rotation of the wheel engages them with the belt &c. In a modification (Figs. 12, 13, not shown), the segments 6 have external teeth engaging a chain and slide on external splines on the flange 12. Wheels according to the invention are described as transmitting drive via a belt kept in tension by a spring-biased jockey pulled to a fixed diameter pulley, and to a second wheel according to the invention without the interposition of a jockey pulley. Six wheels according to the invention are described in series to give sixtyfour changes in ratio. According to the Provisional Specification, instead of the cam mechanism described for moving the segments axially, electromagnetic or electronic means may be used.
GB3127253A 1953-11-11 1953-11-11 Change-speed mechanism Expired GB757405A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3127253A GB757405A (en) 1953-11-11 1953-11-11 Change-speed mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3127253A GB757405A (en) 1953-11-11 1953-11-11 Change-speed mechanism

Publications (1)

Publication Number Publication Date
GB757405A true GB757405A (en) 1956-09-19

Family

ID=10320636

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3127253A Expired GB757405A (en) 1953-11-11 1953-11-11 Change-speed mechanism

Country Status (1)

Country Link
GB (1) GB757405A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015031609A1 (en) * 2013-08-28 2015-03-05 Sanford Health Expandable gear system and methods for use
US9095465B2 (en) 2012-12-20 2015-08-04 Sanford Health Stent deployment device and methods for use

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9095465B2 (en) 2012-12-20 2015-08-04 Sanford Health Stent deployment device and methods for use
WO2015031609A1 (en) * 2013-08-28 2015-03-05 Sanford Health Expandable gear system and methods for use
US9765858B2 (en) 2013-08-28 2017-09-19 Sanford Health Expandable gear system and methods for use

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