IP Library Granted Patent US 10,517,794
Granted Patent B2
US 10,517,794 · App. 15/226,756 · Granted Dec 31, 2019

Low EMF halogen tube heater

Inventor: Raleigh Duncan (Berkeley, CA)
Assignee: SAUNA WORKS INC.
A61H33/063H05B3/008H05B6/44
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Quick Facts
Patent No.
US 10,517,794
App. No.
15/226,756
Granted
Dec 31, 2019
Kind
B2
Abstract

A sauna heater, comprising two halogen tubes powered by alternating current, wired up in such a way that the current going through one halogen tube is opposite in phase from the current going through the other halogen tube, wherein the halogen tubes are parallel and close together so that the EMF emitted by the halogen tubes is canceled out.

Claims (16)

1. A heater for a sauna, said heater comprising:

a first halogen tube;

a second halogen tube parallel to the first halogen tube, wherein a distance between the first and second halogen tube is less than 4 inches, wherein the first halogen tube is the same length as the second halogen tube and the same power as the second halogen tube;

a source of alternating current;

wherein current powering the first halogen tube is 180° out of phase with current powering the second halogen tube,

wherein a total electromagnetic field (EMF) emitted by the heater is between 20 and 30 milligauss, and wherein the distance between the first halogen tube and the second halogen tube is configurable to adjust an amount of EMF emitted by the heater.

2. The heater of claim 1 , wherein the first halogen tube comprises a first end and a second end, and the second halogen tube comprises a first end and a second end, and wherein the first end of the first halogen tube is closer to the first end of the second halogen tube than it is to the second end of the second halogen tube, further comprising:

an electrical connection from the first end of the first halogen tube to a source of alternating current;

an electrical connection from the second end of the first halogen tube to the second end of the second halogen tube;

an electrical connection from the first end of the second halogen tube to the source of alternating current.

3. The heater of claim 1 , wherein the first halogen tube comprises a first end and a second end, and the second halogen tube comprises a first end and a second end, and wherein the source of alternating current has a first pole and a second pole, further comprising:

an electrical connection from the first pole to the first end of the first halogen tube;

an electrical connection from the first pole to the second end of the second halogen tube;

an electrical connection from the second pole to the second end of the first halogen tube;

an electrical connection from the second pole to the first end of the second halogen tube.

4. The heater of claim 1 , wherein the first halogen tube is touching the second halogen tube.

Assignments (3)
SECURITY INTEREST Recorded Jun 26, 2023
From: SAUNA WORKS, INC.
To: CELTIC BANK CORPORATION
Reel/Frame 064056/0676 →
SECURITY INTEREST Recorded Sep 2, 2022
From: SAUNA WORKS, INC.
To: CELTIC BANK CORPORATION
Reel/Frame 060974/0726 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 6, 2017
From: DUNCAN, RALEIGH
To: SAUNA WORKS INC. (AKA FAR INFRARED SAUNA TECHNOLOGY CO.)
Reel/Frame 041890/0874 →
Continuity (3)
Continuation In Part 13427899 · Mar 23, 2012
Provisional Application 62200077 · Aug 2, 2015
Related Publication 20160338905A1 · Nov 24, 2016