Illuminating Apparatus

Kind of Apparatus:

Intensity in Candles:

Name of Maker:

Year Made:

Marks and Number:

Order of Apparatus:

Inside Diameter:

Light Characteristic:

Time of revolution:

Flash interval:

Duration of flash:

Arc of each fixed part:

Number of panels:

Number of flash panels:

Arc of each:

Number of elements in
central drum:

Number of prisms above
central drum:

Number of prisms below
central drum:

Does Apparatus revolve?:

Is there a Revolving Belt:

Revolving panels:

How is flash produced:

Num of Vertical elements panel:

Fixed lens covered:

Pedestal:

Service Table:

Draft Tube description:

Lighthouse Inspection Reports Database

Fort Gratiot Light Station - 1912

Illuminating Apparatus page 1 of 2

Fixed white & white flash.

F.-1200, Fl.-9000 cp.

Henry Lepaute of Paris.

Not given.

None.

3rd

39 3/8" (1000mm)

Fixed white, varied by white flash ever minute, thus: Flash, 6 sec., Eclispe, 25 sec., Fixed 29 sec. Total 60 sec.

4 minutes

Fixed lens drum extending 288° with flash panels.

5 @ 72°, 1 open from floor of lens to top prisms.

Subtends 46° 45'

6 above & 6 below belt.

11 extending 360°

4 Extending 288°

4 each 3 parts - See drawing dated 1891.

By external flash panels.

6 besides belt

All but 6 top most prizms. (sic)

Old typed Cast iron diam top=18", bottom 14", shaft 7.5"

None. There is a damper tube of Russian iron leading to top of the lens prisms.

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Premises | Lantern and Fixtures | Ventilators and Watchroom | Illuminating Apparatus | Closets and Storerooms

Lighthouse Access | Station Boat Info | Tools and Accessories | Light Vessel Specific | Inspection Reports

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