US406364A - Anti-magnetic watch - Google Patents
Anti-magnetic watch Download PDFInfo
- Publication number
- US406364A US406364A US406364DA US406364A US 406364 A US406364 A US 406364A US 406364D A US406364D A US 406364DA US 406364 A US406364 A US 406364A
- Authority
- US
- United States
- Prior art keywords
- watch
- balance
- magnetic
- wheel
- ring
- 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 - Lifetime
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 229910052742 iron Inorganic materials 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000005389 magnetism Effects 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 101150111878 Vegfd gene Proteins 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Images
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
- G04B43/00—Protecting clockworks by shields or other means against external influences, e.g. magnetic fields
Definitions
- the obj ect of my invention is to provide a simple and eiective device Jfor protecting the balances of Watches from magnetism.
- My invention consists in an annular cese surrounding ⁇ the balancewvheel a short diseo tance from its periphery and permanently secured to the lower Watch-plate.
- the Watch-movement A is of the usual description, having the balance B formed of brass and steel and provided with the. hair-- 2 5 spring ct.
- a ring C of soft iron, provided with an inwardly-projecting flange or fillet b, which isl secured to the bottom plate of the Watch by screws c, as shown in Fig. l.
- My improved device can be applied to and form a part of a new Watch, 6r it may be read- 4o ily adapted to Watches already in use.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Adornments (AREA)
Description
(No Model.)
C. 'I'. MASON. ANTI MAGNETIC WATCH. No. 406,364. Patented July 2, 1889.
ATTORNEYS.
UNITED STATES PATENT OEEICE.
CHARLES T. MASON, OF SUMTER, SOUTH CAROLINA, ASSIGNOR, RY DIRECT AND MESNE ASSIGNMENTS, TO THE AMERICAN IVALTHAM TATCH COM' PANY, OF MASSACHUSETTS.
ANTI-MAGNETIC WATCH.
SPECIFICATION forming part of Letters Patent No. 406,364, dated July 2, 1889.
Application filed June 26, 1888. Serial No. 278,256. (No model.)
To all whom it may concern:
Be it known that. I, CHARLES T. MAsoN, of Sumter, inthe county of Sumter and State of South Carolina, have invented a new and Im- 5 proved Magnetic Shield for Vatch-Balances,
of which the following is a specilicatiomreference being had to the annexed drawings, forming a part thereof, in Which- Figure l is a plan view of a Watch-moverc ment to which my improvement has been applied, and Figf is a transverse section taken on line oc in Fig. l.
Similar letters of reference indicate corresponding parts in both views. i5 The obj ect of my invention is to provide a simple and eiective device Jfor protecting the balances of Watches from magnetism.
My invention consists in an annular cese surrounding` the balancewvheel a short diseo tance from its periphery and permanently secured to the lower Watch-plate. The Watch-movement A is of the usual description, having the balance B formed of brass and steel and provided with the. hair-- 2 5 spring ct. Around the peripheryT of the balance-Wheel is placed a ring C, of soft iron, provided with an inwardly-projecting flange or fillet b, which isl secured to the bottom plate of the Watch by screws c, as shown in Fig. l.
' 3o It is Well known that a magnetic body surrounded or inclosed by a body of soft iron is shielded from external magnetic iniiuences. I have made use of this principle in my improved shield for Watch-balances by surrounding the balance with sott iron, thereby pre- 35 venting the steel of the watch-balance from being magnetizcd by induction from the eX- ternal magnets.
My improved device can be applied to and form a part of a new Watch, 6r it may be read- 4o ily adapted to Watches already in use.
It the mainspring or other steel part ot a Watch provided with my improved shield be magnetized, it will have no effect upon the operation of the Watch, as the magnetism, 45 which would Without the shield act upon the balance, will be absorbed by the ring C.
Having thus described my invention, I claim as ner and desire to secure by Letters Patentl. The combination, With a Watch-balance, 5c of a ring of magnetic metal encircling or surrounding the said Watch-balance, substantially as described.
2. The combination, with the balance-Wheel of a Watch,of asott-iron ring surroundingthe 55 balance-Wheel, substantially as specified.
3. The combination, with a balance-Wheel of a Watch, of a ring of soft iron surrounding the balance-Wheel and provided with an inwardly-proj ecting liange on its lower part, sub- 6o stantially as herein shown and described.
CHARLES T. MASON.
Vitncsses:
C. C. HOYT, WM. N. RAFEIELD.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US406364A true US406364A (en) | 1889-07-02 |
Family
ID=2475308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US406364D Expired - Lifetime US406364A (en) | Anti-magnetic watch |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US406364A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH707925A1 (en) * | 2013-04-17 | 2014-10-31 | Ball Watch Company Sa | mechanical oscillator for clock movement. |
-
0
- US US406364D patent/US406364A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH707925A1 (en) * | 2013-04-17 | 2014-10-31 | Ball Watch Company Sa | mechanical oscillator for clock movement. |
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