GB261719A - Improvements in or relating to machines for drilling pearls or the like - Google Patents

Improvements in or relating to machines for drilling pearls or the like

Info

Publication number
GB261719A
GB261719A GB24538/26A GB2453826A GB261719A GB 261719 A GB261719 A GB 261719A GB 24538/26 A GB24538/26 A GB 24538/26A GB 2453826 A GB2453826 A GB 2453826A GB 261719 A GB261719 A GB 261719A
Authority
GB
United Kingdom
Prior art keywords
drill
shaft
drilling
spindle
pearls
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
GB24538/26A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB261719A publication Critical patent/GB261719A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D5/00—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor
    • B28D5/02—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by rotary tools, e.g. drills
    • B28D5/021—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by rotary tools, e.g. drills by drilling

Abstract

261,719. Bienenfeld, J. Nov. 17, 1925, [Convention date]. Drilling-machines; drills. - In a machine for drilling pearls or the like the drill is carried by a chuck on a shaft 11 which is freely slidable within a hollow spindle 10 and carries a driving dog 12 for engagement with projections 13 on a pulley 6 rotated by a belt from a motor 3, the arrangement being such that the shaft and drill may be removed as a whole from the spindle. The pearl &c. 25 is gripped between spring pressed jaws 15, 16 on a work-holder 17 which may be rotated to present either face of the work to the drill, indexing being provided for by a spring-actuated pawl 18. The jaws are perforated to allow the drill to pass through and the feed is effected by means of hand pressure applied to a collar 24 carried by a ball race on the shaft 11. The drill consists of a piece of untempered piano wire and is sharpened as often as required by withdrawing the shaft 11 from the hollow spindle 10 and grinding on a grindstone 7 driven by the motor, the spindle 10 meanwhile rotating continuously.
GB24538/26A 1925-11-17 1926-10-04 Improvements in or relating to machines for drilling pearls or the like Expired GB261719A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR261719X 1925-11-17

Publications (1)

Publication Number Publication Date
GB261719A true GB261719A (en) 1927-10-13

Family

ID=8885096

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24538/26A Expired GB261719A (en) 1925-11-17 1926-10-04 Improvements in or relating to machines for drilling pearls or the like

Country Status (1)

Country Link
GB (1) GB261719A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111483266A (en) * 2020-06-04 2020-08-04 金华市金飞饰品有限公司 Gear type automatic transmission and positioning system for drilling press

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111483266A (en) * 2020-06-04 2020-08-04 金华市金飞饰品有限公司 Gear type automatic transmission and positioning system for drilling press

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