FR2067099A7 - Hard watch case of metal boride - Google Patents

Hard watch case of metal boride

Info

Publication number
FR2067099A7
FR2067099A7 FR6937710A FR6937710A FR2067099A7 FR 2067099 A7 FR2067099 A7 FR 2067099A7 FR 6937710 A FR6937710 A FR 6937710A FR 6937710 A FR6937710 A FR 6937710A FR 2067099 A7 FR2067099 A7 FR 2067099A7
Authority
FR
France
Prior art keywords
metal boride
watch case
hard
metal
hard watch
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
FR6937710A
Other languages
French (fr)
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.)
METAUX ELECTRONIQUES CIE
Original Assignee
METAUX ELECTRONIQUES CIE
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 METAUX ELECTRONIQUES CIE filed Critical METAUX ELECTRONIQUES CIE
Priority to FR6937710A priority Critical patent/FR2067099A7/en
Application granted granted Critical
Publication of FR2067099A7 publication Critical patent/FR2067099A7/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B37/00—Cases
    • G04B37/22—Materials or processes of manufacturing pocket watch or wrist watch cases

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Powder Metallurgy (AREA)

Abstract

Extra-hard watch case is of a metal boride material, pref. made by sintering a mixture of at least one metal boride and a metal or alloy. CrB2, TiB2 or ZrB2 can be used. Small quantities of Cr or Ni carbides may also be added. Scuffing is eliminated, and the specular polish is retained. Typical sinter mixtures are 35% stainless steel or 30-35% Ni with TiB2 or 20% Ni, 10% Co, and 70% of Zr and Hf borides.
FR6937710A 1969-11-03 1969-11-03 Hard watch case of metal boride Expired FR2067099A7 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR6937710A FR2067099A7 (en) 1969-11-03 1969-11-03 Hard watch case of metal boride

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6937710A FR2067099A7 (en) 1969-11-03 1969-11-03 Hard watch case of metal boride

Publications (1)

Publication Number Publication Date
FR2067099A7 true FR2067099A7 (en) 1971-08-20

Family

ID=9042498

Family Applications (1)

Application Number Title Priority Date Filing Date
FR6937710A Expired FR2067099A7 (en) 1969-11-03 1969-11-03 Hard watch case of metal boride

Country Status (1)

Country Link
FR (1) FR2067099A7 (en)

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse