General Information

Serial #

N/A

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

casing is a synthetic (plastic), working components, metal and plastic.

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

12.0 cm

Width

15.0 cm

Height

5.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Fire Fighting

Category

Alarms

Sub-Category

N/A

Manufacturer

AKA

Pittway

Country

Canada

State/Province

Ontario

City

Rexdale

Context

Country

Canada

State/Province

Ontario

Period

1992-2008

Canada

Type of smoke detectors used in Canadian homes.

Function

To detect airborne smoke and alert about its presence.

Technical

20th century invention. Was mass-produced beginning in the 1970's. This type of detector detects small particles of smoke too small to be visible. It includes a tiny mass of radiation. The radiation passes through an ionization chamber, which is an air-filled space between two electrodes and permits a small, constant current to flow between the electrodes. Any smoke that enters the chamber absorbs the alpha particles, which reduces the ionization and interrupts this flow of current, setting off the alarm. Hot air entering the chamber changes the rate of ionization and therefore, the electric current level which triggers an alarm" from www.mvfra.org. It is less expensive than an optical detector. It is equipped with a test button to see if it works well.

Area Notes

Unknown

Details

Markings

Mfr's label;" [logo]/ UNDERWRITERS'LABORATORIES OF CANADA/ LISTED/ SMOKE ALARM/ISSUE NO.14823 C/HOMOLOGUE/ ADVERTISSUER DES FUMEES/ NO. D'EMISSION14823 C/ wake'n warn fire smode detector/ MODEL NO., MODELE NO. WNW77DC-A/ ORDER RE PLACEMENT OWNER'S MANUAL FOR MODEL: WNW77DC-A FROM: /COMMENDEZ LE MANUAL DU PROPRIETAIRE DE RECHANGE POUR LE MODELE: WNW77DC-A/ PITTWAY CORPORATION OF CANADA LTD./ 6650 FINCH AVENUE WEST/ REXDALE, ONTARIO, CANADA M9W 5Y6/ Nuclear logo/ PRINTED IN CANADA/ CAUTION/ RADIOACTIVE MATERIAL/ AMERICIUM 241 1.0nCi//ATTENTION/ MATERIAU RADIOACTIF/ POUR INSTALLATION ET UTILISATION, CONSULTER LE MANUEL/ D'INSTRUCTIONS SON BRUIT CONTINU INDIQUE ALARM. REMPLACER/ LA PILE LORSQUE L'AVERTISSEUR EMET UNE SONNERIE AU MOINS UNE FOIS LA MINUTE. RETOURNER POUR REPARATION./W04-110-15". Front of Fire Alarm: "DETECTOR WILL NOT OPERATE IF BATTERY IS DEAD, DISCONNECTED OF IMPROPERLY INSTALLED/IMPORTANT; READ OWNER'S MANUAL FOR INSTALLATION AND MAINTENANCE INFORMATION./ IF YOU DO NOT HAVE A MANUEL, SEE REVERSE SIDE OF DETECTOR'S BASE FOR MODEL NUMBER AND MANUAL INFORMATION." Inside of Lid:" REPLACE BATTERY WHEN HORN BEEPS ABOUT ONCE PER MINUTE./ ADDITIONAL INFORAMTION ON BASE OF UNIT/ CONSTANT HORN INDICATES ALARM." Inside of Base left side:" WARNING/ USE SPECIFIED BATTERIES ONLY ./OTHER BATTERIES MAY CAUSE IMPROPER OPERATION. /CONSTANT EXPOSURE TO HIGH OR LOW TEMPERATURE OR HIGH HUMIDITY MAY REDUCE BATTERY LIFE." Inside of Base right side: "9 VOLT BATTERY EVEREADY 216, 522 OR 1222 DURACELL MN1604 GOLD PEAK 1604P, 1604S."

Missing

N/A

Finish

Molded casing in off white colour.

Decoration

None