US699863A

US699863A - Demagnetizer.

Info

Publication number: US699863A
Application number: US9963302A
Authority: US
Inventors: Gustav Boettger
Original assignee: Individual
Current assignee: Individual
Priority date: 1902-03-24
Filing date: 1902-03-24
Publication date: 1902-05-13
Anticipated expiration: 1919-05-13

Description

Patented May l3, I902.

G. BUETTGER.

DEMAGNETIZER; (Application filed Mar. 24,1902.)

(l0 Model.)

UNITED. STATES:

ATEN QF R GUSTAV BOE'ITGER, OF MILWAUKEE, WISCONSIN.

DEMAGNETIZER.

SPECIFICATION forming part of Letters Patent No. 699,863, dated May 13, 1902 Application filed March 24,1902. Serial No. 99,633- (No model.)

To all whmn it may concern.-

Be it known that I, GUSTAV BOETTGER, a citizen of the United States, and a resident of Milwaukee, in the county of Milwaukee and 5 State of Wisconsin, have invented certain new and useful Improvements in Demagnetizers; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention has for its object to provide simple, economical, and compact apparatus having utility with an electrical current of sufficient intensity as means for demagnetizing various devices, especially watches and tools, said invention consisting in what is hereinafter particularly set forth, with reference to the accompanying drawings, and subsequently claimed.

Figure 1 represents a plan view of an apparatus in accordance with my invention electrically connected to conductors of an electricservice line or a generator of sufficient electric energy; and Fig. 2, a partly-sectional elevation of the apparatus, this view being indicated by lines 2 2 in the first figure.

Referring by letter to the drawings, A indicates an insulating-base; B, an insulatingslide on the base; 0, a handle in connection with one end of the slide, and D an insulating-block fast on said base and provided with a guide-groove for said slide, the length of which approximates that of the aforesaid base.

Fast on slide B, longitudinally of the same, are combs E F, of conductor material, ar-

ranged so that the teeth of one are centralof' the intervals between teeth of the other.

Fast on block D and extending through a longitudinal slot of same to have contact with continuous upper face portions of combs E F are spring-brushes G H, constituting terminals of local-circuit conductors having binding-post terminals I J for connection with conductors K L of an electric-service system or a generator of sufficient electric energy, an incandescent electric lamp M or other resistance being put in the local circuit, if neoessary. Other spring-brushes P Q, fast on block D, extend through the slot of same to have contact with the teeth of the opposing combs E F on slide B, and these brushes are electrically connected to a hollow-core electromagnet R, mounted on said block. The slide and combs thereon constitute a polechanger, and in practice the same is actuated to cause frequent reverses of the direction of current that goes through the electromagnet. When the brush P has contact with a tooth of comb E and there is contact of brush Q with a tooth of comb F, the current will flow through brush G, comb E, brush P, the electromagnet, brush Q, comb F, and brush H, but there being contact of brush P with a tooth of comb F and brush Q with a tooth of comb E the current flows through brush G, comb E, brush Q, the electromagnet, brush P, comb F, and brush H, the rapidity of the reverses of the direction of current through said electromagnet being in proportion to the speed of movement on the part of the pole-changer, the latter being moved in one direction only or reciprocated, as may be necessary or desirable.

A magnetized watch, tool, or other device is placed in the hollow core of the electromagnet, and the local circuit being energized by connection with an electric-service system or generator the pole-changer is operated to effect its function, there being continued operation of said pole-changer while the device under treatment is exposed in the energized electromagnet, the result being demagnetization ofsaid device.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A demagnetizer comprising a hollowcore electromagnet, a pair of conductor-combs mounted on a slide to have the teeth of one in intervals between the teeth of the other, circuit-terminal brushes in contact with continuous face portions of the combs, and other brushes arranged in electric connection with said magnet to have contact with the combteeth.

2. A demagnetizer comprising a hollowcore electromagnet', a pair of conductor-combs mounted on a slideto have the teeth of one in intervals between the teeth of the other, circuit-terminal brushes in contact with continuous face portions of the combs, resistance in circuit with said brushes,- and other brushes arranged in electrical connection with said magnet to have contact with the comb-teeth.

3. A demagnetizer comprising an insulating-base, an insulating-slide on the base, a

with said magnet to extend through the block-slot and contact with the comb-teeth.

In testimony that I claim the foregoing I have hereunto set my hand, at Milwaukee, in 15 the county of Milwaukee and State of WVisconsin, in the presence of two Witnesses.

GUSTAV BOETTGER.

Witnesses:

H. G. UNDERWOOJ), N. E. OLIPHANT.