# US 5,708,548 A · Protection device for a spa pack

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- Number: US 5,708,548 A
- Document ID: US5708548A
- Status: Granted
- Kind: A
- Application number: 08/653,397
- Filed: 1996-05-24
- Granted: 1998-01-13
- Earliest claimed: 1996-05-24
- Assignees: Cascade Systems Inc.
- Inventors: Teunis Greeve; Bruce Miller
- Web page: https://patentgrep.com/patent/US5708548A

## CPC

- H02H 3/04: with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned {(watching of pilot wires H02H1/0084; protection of protective arrangements H02H7/008; indication of the state of electronic switches H03K17/18)}
- A61H 33/005: {Electrical circuits therefor}
- H02H 3/33: using summation current transformers (H02H3/347 takes precedence)
- H02H: EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS (indicating or signalling undesired working conditions G01R, e.g. G01R31/00, G08B; locating faults along lines G01R31/08; emergency protective devices H01H)
- A61H: PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY (electrotherapy, magnetotherapy, radiation therapy or ultrasound therapy A61N)

## Abstract

A protection device for a spa pack has a sensor and associated controller responsive to failure of the electrical circuits in the spa pack and a warning device responsive to operation of the controller to provide a warning of failure of the power supply for the spa pack. An automatic dialling system responsive to the controller provides automatic placement of a warning signal on a telephone line connected alarm system. The controller is connected within a circuit protected by a ground fault interrupter.

## Claims

### Claim 1

A protection device for an operational spa pack of a spa, the spa pack having a power supply and an electrical state, the device comprising:
a sensor responsive to the electrical state of the spa pack;
a controller responsive to the sensor;
a ground fault circuit interrupter connected between the power supply and the spa pack; and
a warning device responsive to the controller to provide a warning upon operational failure of the spa pack.

### Claim 2 (depends on 1)

The protection device of claim 1 in which the ground fault circuit interrupter is connected between the controller and the spa pack.

### Claim 3 (depends on 2)

The protection device of claim 2 further including:
an automatic dialling system responsive to the controller to provide automatic placement of a warning signal on a telephone line connected alarm system upon operational failure of the spa pack.