GB239296A - Twist-drill grinding machine - Google Patents

Twist-drill grinding machine

Info

Publication number
GB239296A
GB239296A GB1404024A GB1404024A GB239296A GB 239296 A GB239296 A GB 239296A GB 1404024 A GB1404024 A GB 1404024A GB 1404024 A GB1404024 A GB 1404024A GB 239296 A GB239296 A GB 239296A
Authority
GB
United Kingdom
Prior art keywords
headstock
spindle
cam
lug
face
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
GB1404024A
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.)
Mayer & Schmidt Schleifmaschin
Original Assignee
Mayer & Schmidt Schleifmaschin
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 Mayer & Schmidt Schleifmaschin filed Critical Mayer & Schmidt Schleifmaschin
Priority to GB1404024A priority Critical patent/GB239296A/en
Publication of GB239296A publication Critical patent/GB239296A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/24—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills

Landscapes

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

Abstract

239,296. Evans, W. E., (Mayer & Schmidt Schleifmaschinen-u. Schmirgel-Werke Akt.- Ges.). June 10, 1924. Twist drills, sharpening.-In a machine for grinding twist drills comprising a horizontallydisposed headstock 19 carrying the. drill-chuck spindle 10, the oscillation of the headstock and the axial movement of the spindle are both effected by a double cam 13 carried by a sleeve provided with clutch teeth at each face and slidable on a key fixed to a sleeve 12 on the spindle 10 which also slidably engages the key so that the cam and spindle are driven when the cam sleeve is moved into engagement with clutch teeth on the face of a bevel wheel 9 loosely mounted on the chuck spindle and driven from. a vertical shaft 8. The cam 13 engages a plunger 17, horizontally disposed in a bearing in the headstock and bearing against stop 32 to oscillate the headstock, and a bell-crank lever 18 pivoted in the headstock and linked to the plunger 17 engages a collar 20 fixed to the spindle 10 and moves it axially forward, the return of the spindle being effected by a spring 11 engaging the collar 20. The headstock is pivoted about the axis of the shaft 8 and is kept in contact with the strop 32 by a weight or tension spring 21 connected at one end to a fixed part of the frame and at the other to a plunger 23, slidable in a fixed casing 22 and carrying a pin 24 projecting downwards and engaging between a lug 25 on the headstock and a fixed plug 26. When the headstock is being oscillated the pin 24 engages an inclined face 27 on the lug 25 and exerts tension on the spring 21 while running on the lateral face of the lug 26; if, however, the headstock is moved so that the pin slides on to the inclined face 28 of the lug 26, the pin runs on the lateral face of the lug 25 concentric with the axis of the headstock which can then be swung freely. The extent of oscillation of the headstock and backing-off of the drill may be varied bv altering the position of the stop 32 which is adjustably carried by a fixed part. of the machine frame. The spindle is locked, for removal or insertion of a drill when the cam is moved out of engagement with the bevel wheel 9, by a pawl 29 pivoted in the headstock and pressed by a spring to engage between the teeth on the face. of the cam sleeve opposite to the bevel wheel 9.
GB1404024A 1924-06-10 1924-06-10 Twist-drill grinding machine Expired GB239296A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1404024A GB239296A (en) 1924-06-10 1924-06-10 Twist-drill grinding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1404024A GB239296A (en) 1924-06-10 1924-06-10 Twist-drill grinding machine

Publications (1)

Publication Number Publication Date
GB239296A true GB239296A (en) 1925-09-10

Family

ID=10033907

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1404024A Expired GB239296A (en) 1924-06-10 1924-06-10 Twist-drill grinding machine

Country Status (1)

Country Link
GB (1) GB239296A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2186512A (en) * 1986-02-19 1987-08-19 Gardner Alfred B Drill sharpening apparatus
US5241791A (en) * 1992-03-04 1993-09-07 Alfred Brian Gardner Edge tool sharpening apparatus
WO1994002048A1 (en) * 1992-07-16 1994-02-03 Farnham John E Disposable toothbrush
US7651597B2 (en) * 2003-12-16 2010-01-26 Alphasense Limited Electrochemical sensor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2186512A (en) * 1986-02-19 1987-08-19 Gardner Alfred B Drill sharpening apparatus
GB2186512B (en) * 1986-02-19 1989-11-08 Gardner Alfred B Sharpening apparatus
US5241791A (en) * 1992-03-04 1993-09-07 Alfred Brian Gardner Edge tool sharpening apparatus
WO1994002048A1 (en) * 1992-07-16 1994-02-03 Farnham John E Disposable toothbrush
US7651597B2 (en) * 2003-12-16 2010-01-26 Alphasense Limited Electrochemical sensor

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