Diamond tool companies

This page will present tables of registered trademarks, brand names and informal trademarks, and logo images used by various tool companies.

These are closely related concepts that define the way a company presents its products to the public. Registered trademarks, as the term implies, are words, designs, or images that have been granted trademark status by the U. The trademark records maintained by the USPTO are publicly available and can be searched in their online database. In a few cases a company may have claimed a particular name or phrase as a registered trademark, but no corresponding registration could be found in the USPTO TESS database.

In the event that no public record can be found for a claimed mark, it will be included instead in the later section listing informal trademarks. In the table below, the " Company " column is generally the entity name that filed the application. In the case of name changes or mergers, trademarks representing the same product line may be listed under different entity names.

The " Reg. The " First Use " column gives the date of the first public use of the mark, as provided by the company with the application. These dates were generally not subject to validation and may be rough estimates in some cases, especially if the trademark application was filed long after the first use date. In addition to registered trademarks, many tools are marked with words or stamped images serving as brand names or informal trademarks. In some cases, the maker may have claimed the brand as a trademark, but no corresponding registration has yet been found in the USPTO trademarks database or in the Official Gazette publication.

Over time, we expect to be able to locate some of the missing trademark records, and entries in the "Brands" table will move to our "Trademarks" table. Jewellery January 4, Wrist Watches January 4, Medical January 4, Precision Engineering January 4, Defense January 4, Aerospace January 4, Railways January 4, Diamond terminal applicators are used extensively by many of the nation's major wire harness manufacturers.

Our dies, presses, and precision parts are built using only the highest quality tool steels for maximum life. Our finishes in the crimp area are unquestionably the best in the industry. We have the knowledge, skill, and capacity to meet any customer specifications, and we specialize in meeting customer-timing requirements.

As an ISO certified company since , all of our dies undergo rigorous inspections at specified stages throughout the manufacturing process. We have built our reputation on producing quality parts at competitive prices with on-time delivery.

The wrench is also marked with the sizes and the Diamond-Horseshoe logo forged into both sizes, and a small forged-in code "A" appears on the reverse, just below the adjusting knurl on the right see middle inset. The head thicknesses were measured at 0.

Both sides are also marked with the 6 and 8 inch nominal sizes, with a double-quote mark to denote the inch measure.

In the Diamond Calk Horseshoe Company changed its name to "Diamond Tool and Horseshoe", and tools marked with this name can be assumed to be from or later. The reverse is marked "Diamond Tool and Horseshoe Co. Note that the company name on this tool is now "Diamond Tool and Horseshoe" instead of "Diamond Calk Horseshoe", and a glance at the horseshoe logo shows that the diamond no longer has a calk.

The opposite side is marked "Diamond Tool and Horseshoe Co. Diamond appears to have begun producing pliers sometime in the late s to early s, although due to a lack of catalog coverage we're uncertain of the exact date. However, published references in Hardware Age and other publications indicate that Diamond pliers were definitely in production by The overall length is 9. In some of Diamond's later production the company name was dropped in favor of the Diamalloy logo, as the next example illustrates.

The top inset shows a side view of the pliers, illustrating the knurled gripping pattern on the handles. In the s Diamond introduced a distinctive "Handiman" combination tool with the functionality of pliers, wire cutters, adjustable wrench, and screwdriver in one tool. Legend has it that these were developed for use by ski troops in Finland during World War II, although we don't have a definitive reference for this. In any event, the Handiman tool remained popular after the war and was later rebranded as "Handiboy".

The finish is chrome plating, with losses due to wear revealing the copper underlayer. The pliers are marked "Handyboy Duluth" with the Diamalloy trademark logo, and "U.

In the early s Diamond introduced a line of tongue-and-groove pliers under the "Groove-Joint" trademark. The markings are a bit difficult to read, but are located above and to the right of the pivot. The overall length ranges from In the early s J. Swanstrom Jr. The patent notice refers to patent 3,, , issued to J.

The patent describes a method of forging that allows the curved ribs of the pliers to be directly forged with an undercut edge.

The upper left inset in the photograph shows the distinctly undercut edges of the ribs, which helps to hold the jaws of the pliers together under stress. This patent was a significant improvement to the state of the art for tongue-and-groove pliers, as it combined the desirable undercut ribs described in Manning patent 2,, with the forged ribs developed by Daugherty in patent 2,, In addition to producing tools for its own brands, Diamond Calk also provided contract manufacturing services to other companies, and the resulting tools were marked with the customer's brand.

This section will show some examples of Diamond Calk production for other companies. Company of Duluth, Minnesota.

T was a wholesale hardware company formed around as the Kelley Hardware Company. Further information on this company can be found in a publication History of Duluth and St.

Louis County in the section on Kelley-How-Thomson. Duluth Minn. The shank also has a forged-in Diamond-Horseshoe logo near the hanging hole. This wrench has some details in common with the early Diamond production, including the use of the "Duluth Minn U. The shank is also marked with the 12 inch size and "Drop Forged" forged into the front, with the size and "Made in U.

This wrench is easily identified as Diamond Calk production by the construction and markings. We first note that this example is nearly identical in dimensions and features to the Diamalloy 8 Inch Wrench with Broached Opening shown in an earlier figure. The broached hanging hole in particular is an unusual feature for adjustable wrenches, with only two companies known to have made wrenches in this style: Diamond Calk Horseshoe and J.

Although the Danielson wrench is similar to the example here, one major difference is the square jaw opening used by Danielson, instead of the hexagonal jaw found on Diamond Calk production. The upper inset in the photograph shows the distinctly undercut edges of the ribs, which helps to hold the jaws of the pliers together under stress.

In Diamond Tool was conglomerated into the Triangle Corporation, which at the time also owned the Bonney, Herbrand, and Utica tool brands. Later corporate changes brought Triangle into the Cooper Tools conglomerate, which also owned the Crescent brand. In later years the Diamond adjustable wrenches were produced in a different design closely resembling the Crescent brand wrenches.

This design can be easily recognized by the depressed panel of the handle, which extends all the way to the adjusting screw. The jaws of this model open up to about 1.

This example shows the different design used by later Diamond-brand wrenches, with the depressed panel extended all the way to the adjusting screw. A Name Change In or possibly late the company changed its name to Diamond Tool and Horseshoe, dropping the reference to calks, and tools produced after this were marked with the new company name. Later Operations Diamond Tool remained a family-owned business until , when it was sold to the Triangle Corporation, the parent company of the combined Utica, Herbrand, and Bonney tool companies.

Swanstrom, Sr. Trademarks Diamond registered several trademarks, initially for their distinctive Diamond-Horseshoe logo, filed in with the first use listed as Renewed in Manufacturing Dates Diamond tools are not known to be marked with a date code, so the estimation of manufacturing dates must be made based on other factors.

References and Resources Photographs and observations of particular tools are based on items in the Alloy Artifacts collection. Catalog Coverage Currently our catalog resources for Diamond include a "Condensed Catalog Supplement 8" from , catalog W from , and catalog No. Industrial Distributors and Retail Stores Diamond tools were carried by a number of industrial distributors and by some large retailers, including Western Auto Supply and the Gamble Stores chain.

Calk Wrenches and Other Early Tools Diamond's early tool production was intended for the farrier's trade and included items such as calk wrenches, as well as horseshoes and calks. Early Adjustable Wrenches Diamond's original adjustable wrenches from the s were marked "Tool-Steel Drop-Forged" or equivalent , which was likely a high-carbon steel. Adjustable Wrench Sizes Our earliest catalog reference for Diamond adjustable wrenches is the Snap-on catalog, which offered the single-ended wrenches in 4, 6, 8, 10, 12, 15, and 18 inch sizes.

Characteristics of Early Adjustable Wrenches After reviewing a large number of Diamond adjustable wrenches, several examples of relatively early production based on the plain hanging hole were found to have a consistent set of construction and marking differences, when compared with the more modern wrench production.

Early to Mid s.