GB119764A - Improvements in Screw-cutting Machines. - Google Patents

Improvements in Screw-cutting Machines.

Info

Publication number
GB119764A
GB119764A GB1920117A GB1920117A GB119764A GB 119764 A GB119764 A GB 119764A GB 1920117 A GB1920117 A GB 1920117A GB 1920117 A GB1920117 A GB 1920117A GB 119764 A GB119764 A GB 119764A
Authority
GB
United Kingdom
Prior art keywords
screw
slide
nut
lever
lead
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
GB1920117A
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.)
MAY AND PADMORE Ltd
Original Assignee
MAY AND PADMORE 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 MAY AND PADMORE Ltd filed Critical MAY AND PADMORE Ltd
Priority to GB1920117A priority Critical patent/GB119764A/en
Publication of GB119764A publication Critical patent/GB119764A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
    • B23G1/00—Thread cutting; Automatic machines specially designed therefor
    • B23G1/02—Thread cutting; Automatic machines specially designed therefor on an external or internal cylindrical or conical surface, e.g. on recesses
    • B23G1/04—Machines with one working-spindle

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Turning (AREA)

Abstract

119,764. May & Padmore, and Barlow, T. Dec. 29, 1917. Lathes; attachments for turning. - An attachment for converting an ordinary lathe having a compound slide-rest into one for screw-cutting comprises a lead-screw 6, removably mounted on the cross-slide 1, driven from the spindle 10 and adapted to be engaged by a half-nut 9 which is automatically withdrawn when the required length of thread has been cut. The nut 9 is connected by a pin 17 to a hand-lever 18 mounted on the tool slide 4. When the lever 18 is depressed against the action of a spring 20 to throw in the nut, a spring bolt 21 engages under an adjustable bar 22 mounted on the slide 1. When the bolt passes the end of the bar 22, the spring 20 raises the nut 9 from the screw and the slide 4 can be returned by the lever 26. For a second deeper cut, the slide 1 may be advanced slightly on the saddle by the usual hand-screw 3, the gears 14 being initially spaced apart to allow of this. The movement of the slides may be limited by stops and lead-screw and nut can be changed for cutting a thread of different pitch. The cross-slide may have angular adjustment 29 for cutting taper threads, the lead-screw being driven through a universal joint to allow such adjustment.
GB1920117A 1917-12-29 1917-12-29 Improvements in Screw-cutting Machines. Expired GB119764A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1920117A GB119764A (en) 1917-12-29 1917-12-29 Improvements in Screw-cutting Machines.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1920117A GB119764A (en) 1917-12-29 1917-12-29 Improvements in Screw-cutting Machines.

Publications (1)

Publication Number Publication Date
GB119764A true GB119764A (en) 1918-10-17

Family

ID=32348271

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1920117A Expired GB119764A (en) 1917-12-29 1917-12-29 Improvements in Screw-cutting Machines.

Country Status (1)

Country Link
GB (1) GB119764A (en)

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