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Please visit website www. We use cookies to ensure that we give you the best experience on our website. Ingersoll-Rand Acquisition. Registered Trademark Symbol for Proto Tools. Later Proto tools were marked with the R-Circle registered trademark symbol following the Proto name. Although the beginning date of the marking is not yet known, it appears to have been sometime in the mid s. Photographs and observations of particular tools are based on items in the Alloy Artifacts collection.
Our article on the Plomb Tool Company has extensive coverage of the predecessor to the Proto brand. In this section we'll look at some examples of Proto tools. Proto tools were initially identical to the Plomb models except for the markings, with the Plomb name replaced by "Proto Los Angeles".
In the following decades the designs and styles of existing models have evolved somewhat, and newer tools have been added to the product line as well. Since the Plomb tool models have been well documented, we'll concentrate on some of the newer or different Proto tools here. Earlier generations of this model marked with the Plomb brand can be seen as the Plomb Wrenches. The pebbled size field design was used on Plomb-marked tools in the late s, and Proto continued to use this style for a few years.
The decal is marked "Pendleton Tool Industries Inc. In addition to commemorating the founding of the company as Plomb Tool in , the decal provides a rare indication of the manufacturing date for this tool.
The overall length is The finish is cadmium plating, with some loss due to wear and rust. The finish is chrome plating, with extensive losses due to rust. Proto's 37xx series of single-ended flare-nut wrenches are well known, but this style of double-flare wrench is less commonly found. We haven't yet found a catalog reference for this example, suggesting that it might have been a special-order item. Although this example is not marked with a model number, these pliers are listed as model in the Proto catalogs.
The lower inset shows a close-up of the forged-in code "P. There's also a larger "P" to the left of the code which is not part of the standard forged-in code.
The "Los Angeles" marking places the manufacturing date between and , and the "2" year digit in the Danielson date code then indicates production in The inset shows a side view of the pliers, illustrating the "Chevron" gripping pattern on the handles.
This pattern appears to have been used beginning in the early to mid s, as a successor to the Herringbone gripping pattern.
The handle is stamped "MFD. One of the pieces is also marked with a forged-in code "K. The patent notice refers to patent 2,, , filed by H. Mead in and issued in The Proto catalogs referred to this as the "Multi-Plier" and noted the great gripping force of the compound leverage action. Currently our earliest catalog reference to these pliers is from , and this model continued to be available at least through The handles are also marked with forged-in codes "O" front and "U93" reverse , with the front code shown as a close-up in the inset.
The "Los Angeles" marking places the manufacturing date between and , and the "3" year digit in the Danielson date code indicates production in The handles are also marked with forged-in codes "C38" front and "B38" reverse , with the front code shown as a close-up in the inset.
The overall length is 7. The handles are equipped with plastic grips, probably signified by the "G" suffix on the model number. The tongue-and-groove plier design was invented in the early s and sold under the well-known "Channellock" brand by the Champion DeArment Company. Based on a catalog review, Proto was offering tongue-and-groove pliers by or earlier , and by these models were referred to as "Power Track" pliers in the catalogs.
The handle is also marked with a forged-in code "S", shown as a close-up in the inset. Although not marked with a model number, these pliers are listed as model in the Proto catalogs. The "U. The handles are also marked with forged-in codes, one handle with "E" shown in detail in the inset, and the other with a less distinct "B" not shown. The shank also has a forged-in code "X" visible near the hanging hole.
To estimate the manufacturing date of this wrench, the plain hanging hole would place the production in the range , and the "Proto Los Angeles" marking would narrow this slightly to Within this date range, the year digit "3" in the Danielson date code system indicates production in The shank is marked with "12 In. The shank also has a forged-in code "N" visible near the hanging hole, shown as a close-up in the middle inset.
The head thickness was measured at 0. Include description. Breaker Bar 4 Items 4. Flex Head Ratchet 1 Items 1. Long Handle Ratchet 1 Items 1.
Palm Ratchet 1 Items 1. Ratchet Box 1 Items 1. Speed Handle 1 Items 1. Standard Ratchet 35 Items Stubby Ratchet 1 Items 1. Drive Size. Not Specified 2 Items 2. Set or Single Item. Single Item 42 Items Set 4 Items 4.
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