US Patent: 929,662 - Logging-engine


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US Patent: 929,662

Logging-engine

Patentee:

Alexander Dunbar (exact or similar names) - Woodstock, NB Canada

USPTO Classifications:

280/14, 280/28.17, 280/7

Tool Categories:

transportation : logging trucks

propulsion and energy : steam engines

Assignees:

None

Manufacturer:

Alex. Dunbar & Sons Co., Ltd. - Woodstock, NB Canada

Witnesses:

J. Norman W. Winslow

G. L. Balmain

Patent Dates:
Applied:	Dec. 07, 1908
Granted:	Aug. 03, 1909

Patent Pictures:

USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Joel Havens
"Vintage Machinery" entry for Alex. Dunbar & Sons Co., Ltd.

Description:

The primary innovation is a steam engine that can be leveled as it moves up or down a hill to avoid the water in the boiler from leaving tubes uncovered, which can damage the boiler.

An advertisement in the 1909-01-02 Canada Lumberman and Woodworker features this logging engine, made by Alex. Dunbar & Sons Co., Ltd.