US417763A - Device for demagnetizing watches - Google Patents
Device for demagnetizing watches Download PDFInfo
- Publication number
- US417763A US417763A US417763DA US417763A US 417763 A US417763 A US 417763A US 417763D A US417763D A US 417763DA US 417763 A US417763 A US 417763A
- Authority
- US
- United States
- Prior art keywords
- magnet
- watches
- demagnetizing
- opening
- disk
- 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
- 229910000831 Steel Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F13/00—Apparatus or processes for magnetising or demagnetising
- H01F13/006—Methods and devices for demagnetising of magnetic bodies, e.g. workpieces, sheet material
Definitions
- FIG. 1 is a top plan view showing one form of my improved device, and Fig. 2 an end elevation of the same.
- My invention relates especially to means for removing the magnetism from the metal works of watches which have become accidentally charged; and it consists in certain novel features hereinafter fully set forth and claimed, the object being to produce a simpler, cheaper, and more effective device of this character than is now in ordinary use.
- A represents the body of the device, which consists of a rectangular box provided in one end I) with a horizontal stub-shaft d, journaled in a bushing f.
- a pinion g is secured on the outer end of said shaft and meshes with a gear h, journaled on the box end I) and provided with a crankhandle 2'.
- a disk is secured to the inner end of the stub-shaft d, and a bracket m is bolted to the face of said disk.
- a horizontally arranged horseshoemagnet B is secured in said bracket.
- a circular opening 1' is formed directly opposite the poles of the magnet, said opening being covered by aplate of zinc or similar nonmagnetic material 4;.
- a horizontal guide rod or restt projects outward from the end 19 of the box, at one side of the opening 0".
- the watchworks to be demagnetized are held in the opening 4", within the field of the magnet, the rod 25 being employed as a support and guide for the hand.
- the magnet B is then rapidly revolved by means of the gear h and the watch-works slowly drawn away from the poles of the magnet.
- the magnetized works are thus subject to a rapid and constant change of polarity by the revolving magnet while remaining in the magnet-field. As the works are slowly withdrawn from the center of influence each change decreases in intensity. This operation is repeated until the last change is a minimum one, and the steel or magnetized parts of the watch are reduced to their normal condition, or nearly so.
- the plate 1 serves simply as a guide to prevent the watch from being accidentally brought into contact with the poles of the magnet.
- a box a shaft journaled therein bearing a disk, gears for rotating said shaft, a permanent magnet secured to said disk, sothat its poles rotate when the disk moves, an opening in the frame within the field of the magnet, and a non-magnetic guard-plate covering said opening,substantially as and for the purpose set forth.
- the frame or box A provided with the opening 7', the shaft (1, bearing the disk 70 and pinion g, the gear h, for rotating said shaft, and the magnet B, clamped to said disk, with its poles adjacent to said opening, substantially as and for the purpose set forth.
- the frame A provided with the opening 0", the shaft 6?, bearing the pinion g and disk It, the crank-gear h, meshing with said pinion, the magnet B, clamped to said disk, and the non-magnetic guard-plate 4;, covering said opening, combined and arranged, substantially as described.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
(Nd Model.)
P. JLWHILTON. DEVICE FOR DEMA'GNETISING WATCHES.
No. 417,763. Patented Dec. 24, 1889.
v mun Illlllllllllll Q mun-.11
351; @Hozuca UNITED STATES PATENT OFFICE.
FRANCIS J. IVHILTON, OF BOSTON, MASSACHUSETTS.
DEVICE FOR DEMAGNETIZING WATCHES.
SPECIFICATION forming part of Letters Patent No. 417,? 63, dated December 24, 1889.
Application filed October 14, 1889. Serial No. 327,000. (No model.)
part of this specification, in which Figure 1 is a top plan view showing one form of my improved device, and Fig. 2 an end elevation of the same.
Like letters and figures of reference indicate corresponding parts in the different figures of the drawings.
My invention relates especially to means for removing the magnetism from the metal works of watches which have become accidentally charged; and it consists in certain novel features hereinafter fully set forth and claimed, the object being to produce a simpler, cheaper, and more effective device of this character than is now in ordinary use.
The nature and operation of the improvement will be readily understood by all conversant with such matters from the following explanation.
In the drawings, A represents the body of the device, which consists of a rectangular box provided in one end I) with a horizontal stub-shaft d, journaled in a bushing f. A pinion g is secured on the outer end of said shaft and meshes with a gear h, journaled on the box end I) and provided with a crankhandle 2'. A disk is secured to the inner end of the stub-shaft d, and a bracket m is bolted to the face of said disk. A horizontally arranged horseshoemagnet B is secured in said bracket. In the opposite end 19 of the'box a circular opening 1' is formed directly opposite the poles of the magnet, said opening being covered by aplate of zinc or similar nonmagnetic material 4;. A horizontal guide rod or restt projects outward from the end 19 of the box, at one side of the opening 0".
In the use of my improvement the watchworks to be demagnetized are held in the opening 4", within the field of the magnet, the rod 25 being employed as a support and guide for the hand. ,The magnet B is then rapidly revolved by means of the gear h and the watch-works slowly drawn away from the poles of the magnet. The magnetized works are thus subject to a rapid and constant change of polarity by the revolving magnet while remaining in the magnet-field. As the works are slowly withdrawn from the center of influence each change decreases in intensity. This operation is repeated until the last change is a minimum one, and the steel or magnetized parts of the watch are reduced to their normal condition, or nearly so.
The plate 1; serves simply as a guide to prevent the watch from being accidentally brought into contact with the poles of the magnet.
Having thus explained my invention, what I claim is l. The combination of a rotary shaft, a magnet connected therewith, a guard-plate disposed opposite the poles of the magnet, and a support for said guard-plate.
2. The combination of a rotary shaft, a magnet connected therewith, a guard-plate disposed opposite the poles of the magnet, a support for said guard-plate, and a guide-rod attached to said support.
3. In a device for demagnetizing watches, a box, a shaft journaled therein bearing a disk, gears for rotating said shaft, a permanent magnet secured to said disk, sothat its poles rotate when the disk moves, an opening in the frame within the field of the magnet, and a non-magnetic guard-plate covering said opening,substantially as and for the purpose set forth.
4. In a device for demagnetizing watches,
the frame or box A, provided with the opening 7', the shaft (1, bearing the disk 70 and pinion g, the gear h, for rotating said shaft, and the magnet B, clamped to said disk, with its poles adjacent to said opening, substantially as and for the purpose set forth.
5. In a device for demagnetizing watches, the frame A, provided with the opening 0", the shaft 6?, bearing the pinion g and disk It, the crank-gear h, meshing with said pinion, the magnet B, clamped to said disk, and the non-magnetic guard-plate 4;, covering said opening, combined and arranged, substantially as described.
FRANCIS J. WHILTON. Witnesses:
O. M. SHAW, K. DURFEE.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US417763A true US417763A (en) | 1889-12-24 |
Family
ID=2486688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US417763D Expired - Lifetime US417763A (en) | Device for demagnetizing watches |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US417763A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3126502A (en) * | 1964-03-24 | Demagnetizer device using permanent magnets |
-
0
- US US417763D patent/US417763A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3126502A (en) * | 1964-03-24 | Demagnetizer device using permanent magnets |
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