GB885148A - An improved hob shift mechanism - Google Patents

An improved hob shift mechanism

Info

Publication number
GB885148A
GB885148A GB524159A GB524159A GB885148A GB 885148 A GB885148 A GB 885148A GB 524159 A GB524159 A GB 524159A GB 524159 A GB524159 A GB 524159A GB 885148 A GB885148 A GB 885148A
Authority
GB
United Kingdom
Prior art keywords
pawl
plate
engagement
carrier
ratchet wheel
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
GB524159A
Inventor
Percy Garner
James Higson
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.)
David Brown Industries Ltd
Original Assignee
David Brown Industries 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 David Brown Industries Ltd filed Critical David Brown Industries Ltd
Priority to GB524159A priority Critical patent/GB885148A/en
Publication of GB885148A publication Critical patent/GB885148A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23F—MAKING GEARS OR TOOTHED RACKS
    • B23F23/00—Accessories or equipment combined with or arranged in, or specially designed to form part of, gear-cutting machines
    • B23F23/12—Other devices, e.g. tool holders; Checking devices for controlling workpieces in machines for manufacturing gear teeth
    • B23F23/1237—Tool holders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23F—MAKING GEARS OR TOOTHED RACKS
    • B23F23/00—Accessories or equipment combined with or arranged in, or specially designed to form part of, gear-cutting machines
    • B23F23/12—Other devices, e.g. tool holders; Checking devices for controlling workpieces in machines for manufacturing gear teeth
    • B23F23/1237—Tool holders
    • B23F23/1243—Hob holders

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

885,148. Variable-speed gearing. BROWN INDUSTRIES Ltd., DAVID. April 29, 1960 [Feb. 16, 1959], No. 5241/59. Class 80 (2). [Also in Group XXII] A hob shift mechanism comprises hydraulic means 11 adapted periodically to rotate a pawl carrier 13 through 180 degrees and return it to its original position, a pawl 14 on the carrier 13 and engageable with a ratchet wheel 22 connected to a screw mechanism 23, 25 adapted to move the hob in the direction of its axis, and an adjustable masking plate 26 adapted to hold the pawl in an inoperative position for any desired part of the motion of the pawl carrier 13. The pawl 14 is fixed to one end of a pin 15 which is pivotally mounted in the pawl carrier 13 and has integral therewith at its top end a plate 33. The pawl 14 has alternatively operable tooth portions which may selectively be brought into engagement with the ratchet wheel 22 by operation of a lever 17 on a plunger 18 which may be moved into engagement with a slot 16 in the plate 33. Two pegs 25a are fixed to the plate 33 and may coact with the masking plate to prevent engagement of the pawls with the ratchet wheel 22. A spring-pressed shoe 21 holds the appropriate pawl in operative engagement. Adjustment of the position of the mask 26 is effected by operation of a lever 31 and gearing 27, 28. The screw member 25 is attached to a hob support bracket 43 and accordingly controls the location thereof on guides 44. A graduated position scale and limit switch are provided.
GB524159A 1959-02-16 1959-02-16 An improved hob shift mechanism Expired GB885148A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB524159A GB885148A (en) 1959-02-16 1959-02-16 An improved hob shift mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB524159A GB885148A (en) 1959-02-16 1959-02-16 An improved hob shift mechanism

Publications (1)

Publication Number Publication Date
GB885148A true GB885148A (en) 1961-12-20

Family

ID=9792372

Family Applications (1)

Application Number Title Priority Date Filing Date
GB524159A Expired GB885148A (en) 1959-02-16 1959-02-16 An improved hob shift mechanism

Country Status (1)

Country Link
GB (1) GB885148A (en)

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