GB511975A - Improvements in and relating to driving members for lathes - Google Patents

Improvements in and relating to driving members for lathes

Info

Publication number
GB511975A
GB511975A GB6309/38A GB630938A GB511975A GB 511975 A GB511975 A GB 511975A GB 6309/38 A GB6309/38 A GB 6309/38A GB 630938 A GB630938 A GB 630938A GB 511975 A GB511975 A GB 511975A
Authority
GB
United Kingdom
Prior art keywords
piston member
centre
jaws
collet
pins
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
GB6309/38A
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.)
Forkardt Deutschland GmbH
Original Assignee
Paul Forkardt GmbH and Co KG
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
Priority claimed from DE1937F0082589 external-priority patent/DE687947C/en
Priority claimed from DE1937F0082588 external-priority patent/DE703550C/en
Application filed by Paul Forkardt GmbH and Co KG filed Critical Paul Forkardt GmbH and Co KG
Publication of GB511975A publication Critical patent/GB511975A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
    • B23B31/1261—Chucks with simultaneously-acting jaws, whether or not also individually adjustable pivotally movable in a radial plane
    • B23B31/1284—Chucks with simultaneously-acting jaws, whether or not also individually adjustable pivotally movable in a radial plane with a centre

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)

Abstract

511,975. Lathe centres and drivers. FORKARDT, R. Feb 28, 1938, No. 6309. Convention date, Feb. 27, 1937. [Class 83 iii)] A lathe driver for turning work between centres having a pair of clamping jaws 2a actuated by means passing through the spindle has the jaws secured to pins 21 on spiral wheels 21a engaging corresponding spiral teeth on a non-rotating piston member 23 which is moved axially to open and close the jaws. The pins 21 are mounted in a slide 19 which has slight floating movement in the body 1 to relieve the centre 3 from lateral strains. The piston member may be spring urged in the closing direction and has straight teeth 24 coacting with a pin 25. To adjust the jaws the pin 25 is withdrawn and the jaws rotated in unison by means of a hexagonal key inserted in a socket in one of the pins 21. In a modification, Fig. 3, the centre may have axial movement. In this form the piston member 23 is guided in a bush 28 and the centre 3a is urged forwardly by a spring 29 against a stop ring 30 which serves as a work abutment. The rear part of the piston member also encloses a spring 31 which applies pressure to the stamping collet 32. During the forward clamping movement of the piston member 23, the centre has the additional support of the stamping pressure exerted by the collet. On the return stroke of the piston member a shoulder 33 causes positive withdrawal of the collet and unclamping of the centre. Specification 463,227 is referred to:
GB6309/38A 1937-02-27 1938-02-28 Improvements in and relating to driving members for lathes Expired GB511975A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1937F0082589 DE687947C (en) 1935-06-11 1937-02-27 Driver for turning workpieces between centers
DE1937F0082588 DE703550C (en) 1935-06-11 1937-02-27 Driver with core tip

Publications (1)

Publication Number Publication Date
GB511975A true GB511975A (en) 1939-08-28

Family

ID=6540083

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6309/38A Expired GB511975A (en) 1937-02-27 1938-02-28 Improvements in and relating to driving members for lathes

Country Status (1)

Country Link
GB (1) GB511975A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2463102A (en) * 1944-05-17 1949-03-01 Smith Corp A O Static balance testing apparatus
US2558252A (en) * 1945-08-28 1951-06-26 Edouard Dubied & Compagnie S A Automatic driving device for machine tools
US2624224A (en) * 1947-11-01 1953-01-06 Seneca Falls Machine Co Apparatus for driving rotatable workpieces
US2671370A (en) * 1950-07-20 1954-03-09 Wiest Wilhelm Lathe center
JPS5043808Y1 (en) * 1965-07-09 1975-12-15

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2463102A (en) * 1944-05-17 1949-03-01 Smith Corp A O Static balance testing apparatus
US2558252A (en) * 1945-08-28 1951-06-26 Edouard Dubied & Compagnie S A Automatic driving device for machine tools
US2624224A (en) * 1947-11-01 1953-01-06 Seneca Falls Machine Co Apparatus for driving rotatable workpieces
US2671370A (en) * 1950-07-20 1954-03-09 Wiest Wilhelm Lathe center
JPS5043808Y1 (en) * 1965-07-09 1975-12-15

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