Dating bedrock planes
Using combined datasets from ground penetrating radar (GPR) and terrestrial laser scanning (TLS) we document the variety of tectono-geomorphic features that contribute to the morphology of bedrock scarps associated with active extensional faulting in central Italy.Measurement of faulted offsets across such scarps can provide important fault slip-rate data relevant to seismic hazard analysis if ages can be established for offset features.Comparing a Bedrock plane to the standard line of bench planes Stanley offered is like comparing a Cadillac or Corvette to a regular Chevy or Vega. Nice enough for the collection, or it will make a great user. The one apology is the nick in the 3 line lever cap. The tag on the side indicates the collector bought this in 1987 about 35 years ago. Overall it is a very nice plane and good enough for the collection, or will be a fine user. There is no rust or pitting to speak of, just some dust from sitting on the shelf. The knob and handle are the premium Rosewood of the era and very nice. It was not until the type 3 offered in 1900 that they started using the 600 series to number the planes and differentiate them from the regular line of bench planes.Both were made by Chevrolet, both are cars and but what a difference. It has the proper 3 line Bedrock cap, round sides, 1 screw frog adjuster and low front knob of a type 4. Everything else about this fine 607 jointer plane is Like New / Fine and all original. He applied his trademark coat of clear lacquer to protect it from rusting and put it in a glass front case he made for his collection. The type 1 / 2 Bedrocks had the special new mated frog design but were numbered with just a single number.Ask any builder or geologist—bedrock ranks as the ultimate in stability.So it's no wonder that in 1900, when Stanley Rule and Level Company introduced planes that held the plane iron (cutter) rock steady, the company dubbed them "Bedrock." At the heart of the new tool sat an improved frog, patented in 1895 by Stanley's head engineer, Justus Traut.Stanley soon changed their numbers to be the 600 series to set them apart form the standard line of bench planes. Over the years the Bedrock name on the lever cap changed from a 3 line Bedrock cap, to a single line Bedrock, then to a short lived 2 line version.
A later improvement in Bedrock planes came in 1910, when Edmund Schade, then superintendent of production at Stanley, patented a system of draw pins and tapered screws that allowed the frog to be securely drawn down on the base. Stanley's Bedrock planes had a unique frog design milled flat to match the bed of the plane. The other distinguishing feature of these early Bed Rocks is that there is a milled out area where a patent date that was in conflict with a competitors patent was ground out. It has been lightly cleaned, and has a rich dark patina. A previous owner did scratch his name on the side with an electric pen.The standard line of Stanley planes have cast recesses where wood 'chips were prone to gather with the real possibility of throwing the plane out of adjustment. A nice example that will make for a great user when detailed out / tuned up. A workhorse ready to go back to work or it is nice enough for the shelf. There is at least 80% of the of the japanning if not more. Overall it is a very nice plane and good enough for the collection, or will be a fine user. If you have similar antique or collectible tools you want to sell please see our FAQ Page, the Appraisal / Selling Page, and the Selling Your Collection Pages for further info about selling with us.For such a seemingly minor difference, the Bed Rock planes were offered at a premium over the Bailey's, and it was a design that never seemed to be very static nor nearly as popular as Stanley's wildly successful Bailey line.Since the primary difference between the two models is in their frog designs, most of what follows is paid to that minutiae.