The reverse is marked "Diamond Calk Horseshoe Co." and "Duluth, Minn." with the Fig. and the use of the earlier company name indicates production in 1958 or earlier. Broached hanging holes were discontinued sometime in the mid to late 1940s, with the depressed panel extended all the way to the adjusting screw. forged into the reverse. and the finish is chrome plating. This example has the early version of the Diamond-Horseshoe logo, ca. The earlier Diamalloy adjustable wrenches can be recognized by a plain hanging hole, Diamond-Horseshoe logo. and the maximum opening is 1.2 inches. Fig. The upper left inset in the photograph shows the distinctly undercut edges of the ribs, marked with the Diamond logo plus "Tool-Steel Drop-Forged" and "Made in U.S.A." forged into the front, Reinforced Hanging Hole. 26 shows a somewhat later Diamalloy 8 inch adjustable wrench, An example of the new tongue-and-groove pliers can be seen in the October 1959 issue of Popular Mechanics, Diamond-Horseshoe logo forged into the shank. "Hickory" 8 Inch Adjustable Wrench, Diamond "Tool Steel" 12 Inch Adjustable Wrench, Diamond Diamalloy 4 Inch Adjustable Wrench, Diamond "Tool Steel" 8 Inch Adjustable Wrench, Diamond "Tool Steel" 6 Inch Adjustable Wrench, Diamond "Diamalloy" 10 Inch Adjustable Wrench, Diamond M26 6 Inch Bent Thin-Nose Combination Pliers, Ward's "Master Quality" 6 Inch Adjustable Wrench, Diamond Diamalloy 12 Inch Adjustable Wrench, Diamond Diamalloy 8 Inch Adjustable Wrench, Ward's "Master Quality" 8 Inch Adjustable Wrench, Diamond Diamalloy HL18P Groove-Joint Pliers, Diamond Diamalloy 10 Inch Adjustable Wrench, Diamalloy 8 Inch Wrench with Broached Opening, Danielson "Vanadium" 8 Inch Adjustable Wrench. "Motor Spec" (Diamond) K110 10 Inch Combination Pliers, with Inset for Side View. A later registration added the logo showing "DIAMOND" in a diamond shape, Diamond 10 Inch Adjustable Wrench, with Insets for Side View and Reverse Detail, and the finish is plain steel, part of an advertisement on page 23 of a 1922 issue of The Horseshoer's Magazine. marked with "Forged Diamalloy Steel" and "Made in U.S.A." forged into the shank, 55 shows a Ward's "Master Quality" 12 inch adjustable wrench, 52 shows a pair of Diamalloy HL112 12 inch tongue-and-groove pliers, Fig. Diamond-Horseshoe logos, and these remained available until at least the 1960s. The overall length is 6.2 inches, The overall length is 4.3 inches, ca. Diamond-Horseshoe logo forged into the shank, The finish is plain steel. ca. for tongue-and-groove pliers. 21. (A calk is a gripping bit on a horseshoe, stamped "Duluth, USA" with the Diamalloy and The Diamond wrenches illustrated in the Snap-On catalogs from 1927 through 1939 The overall length is 8.0 inches, The next two figures show examples of "Tool Steel" wrenches in the 10 inch size, 30. ca. Fig. 15. and the maximum opening is 1.0 inches. 45 shows a pair of Diamalloy SN56 6 inch needlenose pliers with side cutters, marked "Diamond" and "Tool-Steel Drop-Forged" with the 11. with the 24 inch size only in the alloy steel (Tiger) model. (For a comparison with the Crescent design, see the 8. The overall length is 9.7 inches, with the forged ribs developed by Daugherty in patent with "Diamond Calk Horseshoe Co." and "Duluth, Minn." forged into the reverse. 1959-1982. Photographs and observations of particular tools are based on items in the Alloy Artifacts collection. and tools marked with this name can be assumed to be from 1958 or later. shown in an earlier figure. marked with "Diamond" and "Tool-Steel Drop-Forged" forged into the shank, 1940 to Late 1940s. closely resembling the Crescent brand wrenches. Fig. probably in the early to mid 1940s. The double-ended models were sold at prices typically somewhat lower than the sum of the two standard models Fig. 45. "No Hammering" Marking. The patent describes a method of forging that allows the curved ribs of the pliers Fig. the plain hole continued in production until at least 1939. Diamond-Horseshoe logo Extended Panel for Adjustable Wrenches. Hopefully we'll be able to find a Diamond catalog from around 1940 to help resolve the questions. The head thickness was measured at 0.45 inches. In 1952 Diamond began offering tongue-and-groove pliers under the "Groove-Joint" brand. and the finish is chrome plating. with "Diamond Calk Horse Shoe Co." and "Duluth, Minn. U.S.A." forged into the reverse. 1973+. The next two figures show examples of the Diamalloy 8 inch wrench with a broached hole, ca. and the maximum opening is 1.0 inches. #3,739,664, Diamond Diamalloy 8 Inch Adjustable Wrench, with Insets for Side View and Reverse Detail,
The next two figures show examples of Diamalloy wrenches in the 15 inch size. 49 shows an example of the popular "Handyboy" combination tool, and the maximum opening is 1.8 inches. ca. 1 shows an early Diamond calk wrench for sizes 9/16 and 5/8, Early to Mid 1920s. Diamond retained the ridge or reinforcing ring around the hanging hole. 17. ca. Used for tinner's snips and heavy-duty nippers, Text and Photographs Copyright 2005-2021 Alloy Artifacts. The company name change was not significant in terms of tool production,
The broached hole obviously required having a ring of material around the hanging hole, Triangle itself was later acquired by Cooper Industries, In 1981 Diamond Tool was conglomerated into the Triangle Corporation, 34 shows a later Diamond 12 inch adjustable wrench, and the markings on the wrenches were basically the same as for the single-ended versions of the same era. Fig. 4-6, 6-8, 8-10, and 10-12 inches nominal. but with forged-in codes "A216" and "A248". In some of Diamond's later production the company name was dropped in favor of the Diamalloy logo, This design can be easily recognized by the depressed panel of the handle, Snap-On continued to offer Diamond brand wrenches in its catalogs until the late 1930s, Both sides are also marked with the 6 and 8 inch nominal sizes, drop-forged railroad supplies and wrenches, and their initial product was a patented insertable calk for horseshoes. Diamond-Horseshoe logo forged into the reverse. even after the introduction of "Diamalloy" alloy steel wrenches in 1931, Of the marking details, Currently we're unsure of when the broached-hole feature was first offered by Diamond. 1930s. Adjustable wrenches with the location marked as "Duluth Minn U.S.A." appear to represent Blue-Point HL112P 12 Inch Tongue-and-Groove Pliers, with Inset for Construction Detail, ca. Fig. By the early 1940s Diamond had added a reinforcing ridge around the hanging hole of its Diamalloy adjustable wrenches. Fig. stamped "Motor Spec" and "Duluth USA" near the pivot, 37 shows a pair of "Motor Spec" K110 10 inch combination pliers, The known examples have forged ribs and Diamond is believed to have licensed the patent for this construction [External Link]. Fig. forged into the reverse. The opposite side is marked "Diamond Tool and Horseshoe Co." and "Duluth, Minn." a double-hex broached hanging hole. 10 shows a similar Diamond 10 inch adjustable wrench, nominal size. The overall length is 7.9 inches, Another detail to note is that the hanging hole does not have a reinforcing ring around it. The head thickness was measured at 0.47 inches. 1922 Advertisement for Diamond Adjustable Wrenches. Wrenches were available in sizes 4, 6, 8, 10, 12, 15, 18, and 24 inches, 48 shows an older example of the Diamond's popular "Handiman" combination tool, and the maximum jaw opening is 1.2 inches. Diamond tools were carried by a number of industrial distributors and by some large retailers, In 1958 (or possibly late 1957) the company changed its name to Diamond Tool and Horseshoe, By 1983 adjustable wrenches were being made with the depressed panel extending all the way to the Diamond "Tool Steel" 10 Inch Adjustable Wrench, with Insets for Side View and Reverse Detail, The head thickness was measured at 0.39 inches. 57. Diamond "Diamalloy" 15 Inch Adjustable Wrench, with Insets for Side View and Reverse Detail, and the maximum opening is 0.8 inches. The overall length is 6.3 inches, Diamond-Horseshoe logo This wrench has a reinforced hanging hole, The next figure shows an example of this patent on Diamalloy pliers, with "Diamond Calk Horseshoe Co." and "Duluth, Minn." plus the (This is a non-standard thread pitch.). Fig. Fig. with "Made in U.S.A." forged into the handles. Diamond Diamalloy HL112 12 Inch "Groove-Joint" Tongue-and-Groove Pliers. Diamond-Horseshoe logo near the hanging hole. 43. 14A shows a later Diamond 6 inch adjustable wrench, recognized by the ring around the hanging hole. adjusting knurl, Diamond "Diamalloy" 15 Inch Adjustable Wrench, with Insets for Side View and Reverse Detail, and the broached hole is marked "3/4" on the reverse. the new name was being used by 1959. with some loss due to wear. marked with "Made By Diamond Calk Horseshoe Co." and "Duluth Minn. U.S.A." forged into the shank,
and the finish is plain steel. and the hole is marked with its "1/2" size. In 1931 Diamond began using the "Diamalloy" trademark for their line of alloy-steel tools. The patent notice refers to patent 59 shows a later Diamond 10 inch wide opening adjustable wrench, Fig. Legend has it that these were developed for use by ski troops in Finland during World War II, Our collection database is a work in progress. Cooper Tools had also acquired the Crescent Niagara Corporation, The finish is chrome plating with polished faces, The broached hole was available for both the tool-steel and alloy (Diamalloy) models, Currently our catalog resources for Diamond include a "Condensed Catalog Supplement 8" from 1949, but with a forged-in code "A216". suggesting a later production date than the earliest examples in the previous section. marked with "Forged Diamalloy Steel" and "Made in U.S.A." forged into the shank, The head thickness was measured at 0.71 inches. Fig. Diamond 10 Inch Wide Opening Adjustable Wrench, ca. but it's an open question as to whether the broached hanging holes were present on all wrenches and when its own Blue Point brand adjustable wrenches were introduced, ca. #2,622,464. (By this time the company name had changed to "Diamond Tool and Horseshoe".). or as an optional feature. 41 shows a pair of Diamond N18 8 inch thin-nose combination pliers, 31. 7 shows a Diamond adjustable wrench in the ever-popular 4 inch size, 16 shows an early Diamalloy 6 inch adjustable wrench, marked with "Wards Master Quality" stamped on both sides of the shank. Both sides are also marked with the nominal size as "8" followed by a double-quote inch mark, were found to have a consistent set of construction and marking differences, 2 shows an early Diamond 6 inch adjustable wrench, of its adjustable wrenches. Diamond "Tool Steel" 4 Inch Adjustable Wrench, with Inset for Reverse Detail, The overall length is 12.2 inches, Diamond "Tool Steel" 8 Inch Adjustable Wrench, with Insets for Side View and Reverse Detail, Diamond-Horseshoe logo. 52. a pair of Diamond DH18 8 inch slip-joint combination pliers with an adjustable wrench as one handle. The overall length is 6.2 inches, Note that this wrench is not marked with the Diamond-Horseshoe logo, with "Diamond Calk Horse Shoe Co." and "Duluth, Minn. U.S.A." forged into the reverse. to be directly forged with an undercut edge. Fig. including Riverside, Powr-Kraft, and Ward's Master Quality.
1940s.
but it could be a date code or an identifier for the forging die. 1930s. Fig. 11 shows a Diamond 6 inch adjustable wrench with a broached hanging hole, These appear to have been available only for a relatively brief span, Between 12th and 14th Streets Fig. 19. in an advertisement for several examples of relatively early production (based on the plain hanging hole) in sizes 4, 6, 8, 10, 12, 15, 18, and 24 inches. Both sides are also marked "12 In." Crescent Late Adjustable Wrench. and the maximum opening is 0.7 inches. and the maximum opening is 1.1 inches. and the finish is chrome plating with plastic hand grips. Diamond-Horseshoe logo forged into the reverse. show a plain hanging hole, The overall length is 12.3 inches, The head thickness was measured at 0.51 inches. but it probably went into effect in the early 1940s. 37. Based on this review, Kelley-How-Thomson. marked with "Forged Diamalloy Steel" and "Made in U.S.A." forged into the front, The head thickness was measured at 0.58 inches. and the maximum opening is 0.5 inches. 53 shows a pair of Diamalloy HL18P 8 inch "Groove-Joint" tongue-and-groove pliers, The head thickness was measured at 0.38 inches. marked "Diamond Duluth" and "Made in U.S.A." near the pivot. The head thickness was measured at 0.56 inches. Broached Hanging Hole. Diamond "Diamalloy" 6-8 Inch Double-Ended Adjustable Wrench, with Insets for Side View and Reverse Detail, Diamond "Tool Steel" 6 Inch Adjustable Wrench, with Insets for Side View and Reverse Detail, added a, 06/18/2009: Minor reorganization, The head thickness was measured at 0.53 inches. The head thickness was measured at 0.85 inches. "Horse Shoe" as two words, so that the combined unit resembled two standard models joined at the shank, Fig. "Tool-Steel Drop-Forged" and "Made in U.S.A." forged into the shank, Fig. Fig. 38 shows a pair of Diamond K36 6 inch combination pliers, Swanstrom Jr. of Diamond Tool developed and patented a significant improvement compared to about 1.1 inches for a standard 10 inch wrench. Diamond "Tool Steel" 6 Inch Adjustable Wrench, with Insets for Side View and Reverse Detail, Fig. The top inset shows a side view of the pliers, Fig. This example shows the different design used by later Diamond-brand wrenches, Our only catalog reference to Diamond production with broached hanging holes Diamond "Diamalloy" 8 Inch Adjustable Wrench, with Inset for Reverse Detail, Swanstrom Jr. in 1973. The wrench is also marked with a forged-in code "A330" near the adjusting knurl. and "U.S.A." is forged into one handle. and with "Forged in U.S.A." forged into the handles. left by the trimming die and only partially ground down by later finishing. 25 shows an earlier Diamalloy 8 inch adjustable wrench, Fig. so it appears that the Diamalloy models were available with either option. Waterston No. a pair of Diamond DH16 6 inch slip-joint combination pliers with an adjustable wrench as one handle. The wrench is also marked with a forged-in code "A333" near the adjusting knurl. with an overall length about the same as the larger of the two sizes. Waterston 1926 catalog to distributor list. Learn more about our approach to sharing our collection online. 18 shows a Diamalloy 4 inch adjustable wrench with a broached hanging hole, 5. The wrench is marked with "Forged Diamalloy Steel" and "Made in U.S.A." forged into the shank,
ca. with the threaded end on the inside. nominal size. The overall length is 15.4 inches, but in a variant without the If you would like to know how you can use content on this page, see the Smithsonian's Terms of Use. In 1949 the Diamond price list 307-D offered Diamalloy single-ended wrenches to be directly forged with an undercut edge. The upper inset in the photograph shows the distinctly undercut edges of the ribs, and the maximum opening is 1.4 inches. Mid to Late 1920s. into production around the same time. 32 shows an early Diamond 10-12 inch double-ended adjustable wrench, 10/20/2015: Fixed a bit-rotted link to an early advertisement. The wrenches with the "Duluth Minn. U.S.A." marking also mark the company name using
Fig. or possibly cadmium plating. Early to Mid 1920s. The overall length is 10.0 inches, and the maximum openings are 1.2 and 1.4 inches. stamped with the Diamalloy logo followed by "Groove-Joint" and "Duluth, U.S.A.", The finish is cadmium plating, After reviewing a large number of Diamond adjustable wrenches, a nominal 9/16 with normal clearance. Diamond K36 6 Inch Combination Pliers, with Inset for Side View. 1930s. 13 shows a Diamond 10 inch adjustable wrench with a broached hanging hole. marked "Diamond" and "Tool-Steel Drop-Forged" with the The overall length is 8.1 inches, with "Diamond Calk Horseshoe Co." and "Duluth, Minn." plus the The overall length is 6.5 inches, marked with "Forged Diamalloy Steel" and "Made in U.S.A." forged into the shank, The Alloy Artifacts collection includes two other 6 inch wrenches very similar to the examples 33.
The Diamalloy 12 inch wrenches use a 1/4-32 by 1.38 inch pin to secure the adjusting knurl, The opposite side is marked "Diamond Calk Horseshoe Co." and "Duluth, Minn.", with "Diamond Calk Horseshoe Co." and "Duluth, Minn." plus the The overall length is 12.2 inches, 1940 to Late 1940s. Diamond "Tool Steel" 12 Inch Adjustable Wrench, with Insets for Side View and Reverse Detail, 33 shows a later Diamalloy 6-8 inch double-ended adjustable wrench, marked "Diamond Calk Horseshoe Co." and "Duluth, Minn." with the with "Diamond Calk Horseshoe Co." and "Duluth, Minn." plus the Diamond-Horseshoe logo forged into the reverse. 50 shows a pair of Diamalloy HL18 8 inch tongue-and-groove pliers, marked with "Diamalloy Steel" and "Made in U.S.A." forged into the front, the broaching appears to have been optional, By 1940 Diamond was offering a new feature for its adjustable wrenches: The head thickness was measured at 0.73 inches. 3 shows another similar early Diamond 6 inch adjustable wrench, Fig.
Diamond Early "Diamalloy" 4 Inch Adjustable Wrench, with Insets for Side View and Reverse Detail, The overall length is 8.6 inches, with "Diamond Calk Horseshoe Co." and "Duluth, Minn." forged into the reverse. Diamond-Horseshoe logo and may be either nickel or chrome on top. 24 shows a Diamond Diamalloy 6 inch adjustable wrench, Diamond-Horseshoe logos, Based on a review of Snap-on catalogs, Later wrench production provided smoothly ground edges on the handle. and a Diamond catalog from the late 1940s shows a reinforced (but not broached) hanging hole. the company was formed to make calks and horseshoes, Although the Danielson wrench is similar to the example here, The distinctive feature of this example is the 1/2 inch double-hex broached hanging hole, Fig. with minor pitting due to rust. for some tools. By 1983 adjustable wrenches included a "No Hammering" warning forged into the shank. Diamond Early "Diamalloy" 10 Inch Adjustable Wrench, with Insets for Side View and Reverse Detail, which offered Diamond-made wrenches under the Gamble's and Tiger (alloy) brands. Fig. Both sides are also marked with the "4 In." left by the trimming operation. Fig. and the finish is chrome plating. 56. but it's not known whether the new feature was present on all wrench models, 1940 to Late 1940s. 27. The overall length is 8.1 inches, The overall length is 7.9 inches, which offered the (single-ended) wrenches in 4, 6, 8, 10, 12, 15, and 18 inch sizes. 35 shows a later Diamalloy 8 inch adjustable wrench, Early Diamond 9/16 Calk Wrench, with Inset for Reverse Detail, ca. 1942-1945. Diamond "Diamalloy" 15 Inch Adjustable Wrench, Diamond "Tool Steel" 10 Inch Adjustable Wrench, Ward's "Master Quality" 12 Inch Adjustable Wrench, Diamond Early "Diamalloy" 4 Inch Adjustable Wrench, Diamond "Diamalloy" 6-8 Inch Adjustable Wrench, Diamond "Tool Steel" 10-12 Inch Adjustable Wrench, Diamond "Diamalloy" 8 Inch Adjustable Wrench, Diamond "Diamalloy" HL19-1/2 Groove-Joint Pliers, Diamond Diamalloy KC-18 Hose Clamp Pliers, Diamond Diamalloy 6 Inch Adjustable Wrench, Diamond K18 "Motor Spec" Combination Pliers, Diamond K.H.T. 59. 39. The finish is cadmium plating, marked "Groove-Joint" and "Duluth, U.S.A." with the Diamalloy logo. and if you look carefully at the logo, Montgomery Ward sold tools under a number of brand names, The overall length is 8.1 inches, The overall length is 9.8 inches, The same page also lists double-ended adjustable wrenches, in sizes 4-6, 6-8, 8-10, and 10-12. marked with "Diamalloy Steel" and "Made in U.S.A." forged into the front. The wrench is marked with the Diamond logo followed by Diamond Tool and Horseshoe Name. and the maximum opening is 1.3 inches. and the maximum opening is 1.2 inches. marked with the Diamond logo plus "Tool-Steel Drop-Forged" and "Made in U.S.A." forged into the front, and the finish is zinc plating. and the finish is chrome plating. At this time the tool-steel wrenches were available only in the single-ended style,
using a double-quote mark to denote the inch measure. In any event, 2. Diamond-Horseshoe logo, with "Diamond Calk Horseshoe Co." and "Duluth, Minn." plus the The overall length is 12.2 inches, "Motor Spec" (Diamond) K18 8 Inch Combination Pliers, with Inset for Side View. The maximum head thickness was measured at 0.57 inches. Diamond's earliest wrench production. Washington, D.C. Email powered by MailChimp (Privacy Policy & Terms of Use), African American History Curatorial Collective, Trade Literature at the American History Museum Library, Smithsonian Libraries Trade Literature Collections. characteristics of early production. 28 shows a Diamalloy 10 inch adjustable wrench, and a small forged-in code "A508" appears on the reverse, Currently we're unsure of when the broached-hole feature was first offered by Diamond. nominal size. The overall length is 6.2 inches, The shank also has a forged-in The overall length is 8.1 inches, The overall length is 6.4 inches. Diamond-Horseshoe logo Fig. 57 shows a later Ward's "Master Quality" 6 inch adjustable wrench, 42 shows a pair of Diamond Diamalloy KC-18 hose clamp pliers, 5 shows another early Diamond 8 inch adjustable wrench, The head thickness was measured at 0.79 inches.
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