Walnut Cased Barograph

1900 - 1920

Sold by Shackladys Antiques

Description

John Trotter walnut-cased Barograph, having five beveled glazed removable lid, and a drawer below to house the charts. The mechanical eight-day movement is housed in the drum, fitted with a seven-day chart that covers one full rotation of the drum. The ink trace, or barogram, on the recording paper, is a visual record of changes in pressure.

The aneroid barometer mechanism has seven stacked vacuum capsules and utilizes a gate suspension, a refinement developed to improve sensitivity. The barograph has a thermometer and its original glass ink bottle recessed into the case.

Dimensions

Height 9 Inches

Width 14.5 Inches

Depth 9 Inches

Physical Dimensions

Height

23cm (9.06")

Width

37cm (14.57")

Depth

23cm (9.06")

Declaration

Shackladys Antiques has dated this piece to the 1900s.

Reference Numbers

Sellingantiques Reference

SA1113927

Dealers Notes

Delivery Information

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Description

John Trotter walnut-cased Barograph, having five beveled glazed removable lid, and a drawer below to house the charts.

“

The mechanical eight-day movement is housed in the drum, fitted with a seven-day chart that covers one full rotation of the drum.

Shackladys Antiques

The ink trace, or barogram, on the recording paper, is a visual record of changes in pressure.

fig 1. Walnut cased Barograph — fig 1. Walnut Cased Barograph

The aneroid barometer mechanism has seven stacked vacuum capsules and utilizes a gate suspension, a refinement developed to improve sensitivity. The barograph has a thermometer and its original glass ink bottle recessed into the case.

Dimensions

Height 9 Inches

Width 14.5 Inches

Depth 9 Inches

Physical Dimensions

Height

23cm (9.06")

Width

37cm (14.57")

Depth

23cm (9.06")

Date of Manufacture