Clyde Iron Works - Amclyde Engineered Products, Inc., 1912-1962 and n. d.
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Held at:
Historical Construction Equipment Association
16623 Liberty Hi Rd
Bowling Green, OH 43402
Phone: 419-352-5616
Fax: 419-352-6068
Email: tberry [at]
Record Series Number: 1/101/261
Created by: Clyde Iron Works - Amclyde Engineered Products, Inc. (1889-)
Volume: 0.3 Linear Feet
More information is available at;
Biographical Note for Clyde Iron Works - Amclyde Engineered Products, Inc. (1889-) :

Clyde Iron Works was established in Duluth, Minnesota, in 1889. Its first major product was the McGiffert Log Loader, which was introduced in 1902; its inventor became a company officer.

It was owned by a succession of companies, including:

• Barium Steel Corporation, as a subsidiary in 1944 (the Barium names was printed on and then blotted from records dated Nov 1955 and Jul 1956);

• Republic Industrial Corporation, as a subsidiary from at least Nov 1958 into 1967;

• Vare Corporation, as a subsidiary as of 1968;

• A Microdot Company, as of Mar 1973;

• A Unit of the Equipment Systems Division of Dombirco, Inc. as of Oct 1973;

• A Unit of the Equipment Systems Division of Amca International Corporation, from at least Jan 1976 through at least Jun 1981;

• A Unit of Amca International Corporation, as of Jun 1983.

This is not a comprehensive list, but was assembled from records in this collection. Clyde is cited as Koehring-Clyde in an undated Caterpillar diesel engine applications brochure.

American Hoist & Derrick acquired Clyde Iron Works in 1986, and merged it with American’s Marine Division to create AmClyde. The Duluth facilities were closed at this time. In 1988, Duluth Engineering & Manufacturing Company leased the Duluth plant, bought its equipment, hired part of Clyde’s former staff, and began manufacturing parts for AmClyde.

AmClyde was a brand of National Oilwell Varco as of Apr 2008; this company also owned the remnants of Unit Crane & Shovel (Collection 1526).

According to an article in the Thomas Berry Collection (Collection 9, Group 8, Series 1, Folder 8), whirley cranes branded as Clyde-Wiley (Clyde Iron Works and Dayton Whirley Company/Wiley Whirley?) were used in building the second stage of Grand Coulee Dam.

The Clyde Park market, hotel, sports and entertainment complex was constructed on the site of the former Clyde Iron Works facilities in Duluth in the early 2000s, and was open as of 2009.

There is no known relationship between this Clyde Iron Works and an identically named steel fabrication firm that was founded in 1786 and that served the shipbuilding industry at Clydebridge, Scotland until 1978.

Access Restrictions: There are no restrictions on this collection.
Subject Index
Air compressor
Air hoist
Amca International
American Hoist & Derrick
Barge derrick
Barium Steel Corporation
Belt hoist
Blaw-Knox Company
Bucket holding drum
Bull wheel
Cable backhoe
Cable hardware
Cableway engine
Camden, New Jersey
Cane derrick
Cane engine
Central Engineering Company
Chicago Regional Port District
Churn drill
Clamshell bucket
Clamshell dredge
Clyde-Keith Excavator
Clyde Bailey Excavator
Clydebridge, Scotland
Clyde Iron Works
Clyde Park
Concrete tower
Concrete tower hoist
Decker Log loader
Derrick car
Dipper dredge
Dombirco, Inc.
Donkey engine
Dredge engine
Dredge hoist
Drilling platform
Dry dock
Duluth, Minnesota
Duluth Engineering & Manufacturing
Endless rope engine
Erecting engine
Four-Line Self-Propelling Log Skidder
G. H. Williams Company
Grand Coulee Dam
Great Lakes Dredge & Dock
Guy derrick
Hand winch
Haulage engine
Hayward Company
Hoisting crab
Hoisting engine
Hook block
Horizontal engine
Horse Power
Housatonic River Dam
Hydraulic dredge
Industrial Brownhoist
J. B. Rose General Contractor
J. K. Davison & Bro.
Lakewood Engineering
Land Clearing Machine
Leathem D. Smith Dock Company
Lever bank
Liberty ship
Lighterage derrick
Log loader
Marine derrick
Marine railway
Mast hoist
Material elevator
Material Service
McGiffert Log Loader
McLain Line
Merritt-Chapman & Scott
Mine hoist
National Oilwell Varco
Orange peel bucket
Ore dock
Orton Crane
Owen Bucket
Pedestal crane
Phoenix Engineering Corporation
Pile driver
Pile hammer
Pole handler
Portable Excavator and Material Transfer Machine
Port of Beaumont, Texas
Port of Duluth, Minnesota
Port of Long Beach
Quarry engine
Rapid Loader
Republic Industrial Corporation
Reversing engine
Roanoke Rapids Dam
Seaway Port of Duluth, Minnesota
Self-Unloading Boat
Sheave block
Sheave engine
Ship unloader
Shop derrick
Skeleton engine
Slackline dragline
Slackline dragline engine
Snatch block
Spud hoist
Steam air compressor
Steam engine
Steam fittings
Steam gauge
Stiffleg derrick
Stump puller
Sturgeon Bay, Wisconsin
Sugar cane
Swing engine
Thomas Nelson
Tower derrick
Tower excavator
Traction crane
Transfer engine
Truck crane
U. S. Army Corps of Engineers
U. S. Engineering Department
Unit Crane & Shovel
Universal Steam Logger
Vare Corporation
Whirley crane
Wiley Whirley
Williams Bucket
Winch engine
Wire rope
Wisconsin Central
Genres/Forms of Material
Artist's rendition
Catalog page
Comparative spec
Crane rating chart
Prospect evaluation
Reeving diagram
Sales literature
Sepia print
Spec sheet
Languages of Materials
English [eng]
Physical Access Notes: Many records in Group 1 Series 1 Subseries 1 are in poor physical condition.
Acquisition Notes:   

This is an artificial collection comprised of records from multiple accessions. Initial records in this collection were found in files. Additional records have been added from:

• Judd Griffith Collection, Accession 2000-0113 (received Sep 22 2000)

• Donald W. Frantz Collection, Accession 2005-0150 (received Dec 31, 2005). Filed with his collection per his request.