US844300A

US844300A - Process of neutralizing static electricity.

Info

Publication number: US844300A
Application number: US30060406A
Authority: US
Inventors: William H Chapman
Original assignee: CHAPMAN ELECTRIC NEUTRALIZER Co
Current assignee: CHAPMAN ELECTRIC NEUTRALIZER Co
Priority date: 1906-02-12
Filing date: 1906-02-12
Publication date: 1907-02-12
Anticipated expiration: 1924-02-12

Description

No. 844,300. PATENTED FEB. 12, 1907. W. H. CHAPMAN. PROCESS OF NEUTRALIZING STATIC ELECTRICITY.

APPLICATION FILED FEB.12,1906.

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UNITED srarnsrarnsr QFFICE.

WILLIAM H. CHAPMAN, OF PORTLAND, MAINE, ASSIGNUR T0 CHAPMAN ELECTRIC NEUTRALIZER COMPANY, OF PORTLAND, MAINE, A (301% IUItATION OF MAINE.

PROCESS OF NEUTFi/tLiZtNQ-Z S'llfii'i'l@ ELECTRIQITY.

Specification of Letters Patent.

Patented Feb. 1.2, 1907.

Application filed February 12, 1906, Serial No. 300,604.

MAN, a citizen of the United States ol" America, and a resident of Portland, Maine,

provenients in Process of Neutralizing Static Electricity, of which the following is a speci iication.

My present inventionrelates to a process ol removing static electricity from roving or g i l I yarn in textile work and from other articles where, as a matter ol convenience or ne-,

cessity, the apparatus must be located at a more or less remote distance from the WOili.

My method consists in placing charged electric conductors at some available point near the material to be treated; but it may be farther away than the charges could of themselves alone have any influence on the material, and then by suitable means creating a current of air which shall pass around or over the conductor and which shall carry the charge across the intervening space, and thus neutralize the static charge in the material subject to the process. For instance, in the process of manufacturing mohair into yarn there is much trouble in the combing-ma chines and drawing-frames and spinningfraines caused by the material being charged by compression between the rollers, and as the compression is repeated many times in various parts of the machine and as each machine is already crowded with the coin stituent parts of the machine itself, leaving no available room, for additional parts, it becomes important to place the neutralizing apparatus outside of the machine as, for instance, overhead on the ceilingol the rooin-- and to provide for conveying the neutralizing charges to the material in all parts of the machine at the same time. 7

A simple means of carrying out my proeess is shown in the accompanying drawing, in which A is a rotary blower, B is a network of electric conductors kept charged through wire (I, and (l is the roving of mohair or other material passing through the rollers e 01 a drawing-heme, whereby it is continually being charged.

The network of the Wires B may be kept charged by any suitable means--as, for in stance, by a Wimshurst machine D or by an.

I nicnt.

ol' the air supplied or ol the voltage ol the no alternator-giving high voltage and having its charges partially or wholly coinniutated,

so as to givethe wires a charge which, for the most or the whole of the time, is of a polarity have invented certain new and usclul lniopposite to that ol' the material under treat,-

A proper regulation ol the quantity electric charge, or both, then enables us to secure perfect neutralization.

l hint that in carrying my process into prac tical use I get good results ll'Olii an alternat ing current ol unequal pulsations, the long 5 pulsation being of opposite polarity to the charge in the mohair or ot her body, while the short pulsation is of Lkc polarity; l have used lor the purpose an alternation in hich the prevailingpolarity was three times thatol' the lesser. liy thus producing a charge in which the prcponderating kind ol' electricity is so far in excess ol" the lesser kind the charge can be conveyed considerable t ist ances by the use of the air-current, and it does not require the accurate regulations which is necessary when the charge is all of one polarity.

In order to carry the charges from the conductor to the article to be iientralizml, it is may be varied indefinitely, any other suitable devices being used. For instance, the conductor may have a series ol points l'i'oni which the electrical charges may escape into the air, and many forms may be devised l'or this purpose.

I'lind thatitisiinportant to use a conductor which will admit the air-current passing over and around it coming into coi-itact with its external surface like the wire-netting above described, since it. is a well-known law oi electricity that air can only become electriiied by coming in contact with the external surl'ace oi conductors, the electricity being concentrated at that portion ol' the conductor.

I elaiinl. The process ol neutralizing static electricity in a body consisting of blowing a current of air against said body and placing in said air-current before it reaches said bony a opposite polarity to that contained in the blowing a current of air against said body body.

2. The process of neutralizing static charges of electricity in a body consisting of 5 blowing a current of air against said body and placing in said air-current a conductor having applied to it an alternating charge of electricity.

3. The process of neutralizing static [o charges of electricity in a body consisting of and placing in said air-current a conductor having an alternating charge of electricity with a series of relatively long and short inipulses of which the long iin )ulsos have a polarity opposite to that of t 1e charged body.

WILLIAM H. CHAPMAN. Witnesses:

S. W. BATES, MARY A. DONALDSON.