Sewer gas is like a lot of topics in construction and maintenance. Sewer gas should be understood, and its relative danger respected. Fear is not the same as knowledge and respect.
Knowledge coupled with respect is not au courant in today’s world. If you watch any “home improvement” show, there is only one constant. Everyone wears safety glasses all the time no matter how trivial the dangers involved. I have seen people put on safety glasses to hang drapes. If you truly understand risk, and respect danger in proportion to that risk, you are using judgment. If you do not understand risk, but are simply afraid of everything, you wear safety glasses all the time. An overwhelming fear of putting your eye out trumps any rational assessment of the behavior you should undertake to avoid it. You’d be smarter to examine your neurotic urge to achieve an illusory feeling of safety while ignoring really dangerous things.
Safety glasses are the clown shoes of fear. I have seen all the shelter shows — once — and I have observed a noticeably pregnant woman put on safety glasses in order to undertake the demolition of perfectly good tile in her tract home bathroom. It’s not unwise to wear safety glasses if you’re determined to strike ceramic tile with a sledgehammer. It’s just really dumb to think that striking ceramic tile with a sledgehammer is how demolition is accomplished. The pregnant woman was wearing flip flops in order to display her painted toenails to the public. People who understand risk and respect the process they’ve undertaken do not perform demolition in open-toed shoes while pregnant. Believing that wearing safety glasses under those circumstances bestows safety is magical, cargo cult thinking. Magical thinking doesn’t result in safety, ever. It results in paranoia with recklessness ladled all over it.
Sippican Cottage, “Interestingly, ‘Malfunction of Unknown Provenance’ Is the Name of My Men Without Hats Tribute Band. But I Digress”, Sippican Cottage, 2016-02-25.
March 15, 2016
QotD: Safety glasses are not magical talismans of protection
January 9, 2016
QotD: Humans and apes
On what separates us from the apes:
Michael Tomasello, one of the world’s foremost experts on chimpanzee cognition, [said] “It is inconceivable that you would ever see two chimpanzees carrying a log together.”
On what doesn’t separate us from the apes:
Acheulean tools [a style used by hominids 1.8 million years ago] are nearly identical everywhere, from Africa to Europe to Asia, for more than a million years. There’s hardly any variation, which suggests that the knowledge of how to make these tools may not have been passed on culturally. Rather, the knowledge of how to make these tools may have become innate, just as the “knowledge” of how to build a dam is innate in beavers.
Jonathan Haidt, quoted by Scott Alexander in “List Of The Passages I Highlighted In My Copy Of Jonathan Haidt’s The Righteous Mind“, Slate Star Codex, 2014-06-12.
December 13, 2015
How to Sharpen a Knife with Paul Sellers
Published on 11 Dec 2015
Paul shows his very simple method of how to get a razor sharp edge on your kitchen, carving, pocket or any form of knife using just a few pieces of sandpaper or some diamond paddles.
November 7, 2015
3D printing is coming to all sorts of markets
Lee Valley now offers a 3D-printed plumb bob and shows the advantages of using 3D print capabilities:
July 27, 2015
Sharpening and Setting the Bench Plane with Paul Sellers
Published on 23 Jul 2015
Paul Sellers shows how he sharpens and sets a bench plane in his every day of work. A quick and easy guide to get your plane working.
April 1, 2015
The Building of a Custom Bench Plane Revealed
Published on 1 Apr 2015
Watch this behind-the-scenes video on the making of our Custom Bench Planes.
February 21, 2015
How to make the Three Joints – Dovetail – with Paul Sellers
Published on 17 Feb 2015
It takes a master woodworker to teach the basics. Watch Paul’s every move in this video. He shows every single detail of cutting this essential woodworking joint. This is one of the three joints that Paul talks about in his woodworking curriculum. The dovetail is the essential box joint. It is the strongest way to join two pieces of wood at the corner. Although there are many variations on a theme with this joint mastering the most simple form is the most difficult and important step.
January 29, 2015
October 25, 2014
Sharpening woodworking tools
Paul Sellers talks about the practical limits to sharpening woodworking tools like planes and chisels:
As I have said, we have become something of an obsessive bunch when it comes to the different elements of working wood; sharpness has become more and more obsessive. Now we are not talking about the violin maker seeking sharp levels for clear tone from the wood and who uses wood so soft, unsharp gouges and planes would bruise rather than cut the fine surfaces he strives to achieve. His standards parallel the levels needed for severing tissue by the surgeon’s hand, not the bench joiner chopping mortises and cutting a few dovetails.
It’s unfortunate that since the demise of ordinary craftsmanship we now turn to guru wood writers and not wood-wrights. Woodwrights are no longer there to give us our information of course. It’s true too that the sources of information become more and more questionable. Three recent sources of information teaching on sharpening techniques I tracked back to tool catalog and online sales people selling products for sharpening. Most of the information they have is not new but regurgitated. Each phase of sharpening change marks another saleable product and so we see Japanese water stones added to carborundum stones, Arkansas stones and Washita stones and then came diamonds and abrasive films, diamond paste and flattening stones. The list goes on.
We have survived the different gospels of scary sharp and micro-bevel methodology and are emerging to this very simple reality. As long as you start the cutting edge somewhere around 30-degrees and polish it out it will cut well. If you you sharpen to around 1200-grit it will cut most anything you need in woodworking. If you sharpen to a polished edge of around 15,000-grit you can slice the most delicate of materials effortlessly, but 98% of the time that’s far from necessary. What am I saying? I’m saying that we generally sharpen to task but often sharpen to a higher level because it’s not much extra effort. We all know after a few efforts at sharpening that the greatest effort comes at the start of the process when we have to regain ground to get through a fractured and dulled edge and back to a productive cutting edge. That said, it’s not a big deal, just a few extra strokes on the coarse diamonds gets you there. So, if that is the case, why do we sharpen to higher levels than are usually needed. Well, it is a fact that the more polished the two plains forming the arête for a cutting edge are, the sharper the edge is but the stronger the edge is too. As I said, the extra effort is worth the work because it’s so quick and effective. It’s not so much what we do to the edge to establish it but what we do to the edge after we have prepared it for work. Taking the chisel to the surface of the wood to work the wood begins an immediate process of edge reduction we now know is edge fracture but was once called wear. No matter the steel, edge fracture occurs at some level but some steels fracture more readily than others. What we often do not realise is that it is impossible to find a steel that both takes and retains an edge and at the same time has a level of durability we can rely on forever. All edges wear away by fracture and constantly need restoring.
September 2, 2014
Sharpening woodworking tools
I’m an occasional woodworker, but I’m always aware I don’t sharpen my tools as often as I should. One of the reasons I don’t is that it’s such a hassle to sharpen them properly: it’s not as simple as sharpening a kitchen knife, and you need to spend time to work through from a coarse grit (250 or so), through medium grit (1000) and into fine (4000) or even superfine (15000 and higher). This video by Paul Sellers has persuaded me that it doesn’t have to be that way for most of the woodworking hand tools I’m likely to use:
Published on 8 Nov 2013
In this video Paul Sellers shows that you don’t need to sharpen to 15,000+ grit on you planes, chisels and other woodworking tools. 250-grit works just fine for most of our woodwork. Paul addresses the myths and misinformation put forward, and challenges what we think about sharpening.
To find out more about Paul Sellers and the work he is involved with visit http://paulsellers.com
April 1, 2014
Innovative new bench design for woodworkers
The deep thinkers at Lee Valley Tools have come up with a brilliant solution to a perennial woodworking problem:
H/T to Jon, my former virtual landlord, who said “I’d like to see someone do a legitimate motion study on this and prove that it would actually work”.
August 26, 2013
A small note from the hand tool trade
In a discussion of the plight of Sears in the major appliance market, Coyote Blog mentions an earlier Sears mis-step in a different market:
Oddly, I witnessed a similar Sears private label fracas when I worked for Emerson Electric over a decade ago. For years and years, Emerson (not the folks who make the cheap radios and TVs) manufactured many of the Sears Craftsman hand tools and power tools. Sears got tough one year, and negotiated a better deal of some sort with someone else, and an entire division of Emerson saw its sales basically going to zero. So Emerson bought a bunch of orange paint and plastic, went to Home Depot, and cut a deal for a private label tool line at Home Depot (Emerson separately owns the Rigid tool company, so a lot of the items were branded Rigid). Emerson ended up in potentially better shape (I did not stay long enough to see how it turned out), partnered with a growing rather than a declining franchise.
March 8, 2012
Woolley: We need power tools (and cars) for girls
Over at the Worthwhile Canadian Initiative blog, Frances Woolley marks International Women’s Day:
Goods are becoming ever more specialized. Everything from baby diapers to multivitamins is now dispensed in gender- and age-appropriate models. Yes, it makes sense to have his and hers jeans. But gender appropriate soft-drinks? Does the average guy’s masculinity really need to be bolstered by buying Coke Zero instead of Diet Coke?
The profitability of his and hers products is partly due to price discrimination. The local hair salon charges women more than men because women are prepared to pay $50 or $60 to get their hair cut. Men asked to pay that price would just walk across the road to the barber shop that charges $15 for a short back-and-sides.
[. . .]
Second, gender differentiated power tools. I have small hands. My palm sander doesn’t fit into my palm — it’s more like a two-handed sander. I’d love to get a new drill, but most have such a large grip that I can barely hold them. It’s not just a gender issue — men’s hands come in all sorts of different sizes, too. How can women be expected to share equally in home repair duties when every power tool is the wrong size for their hands?
Finally, I’d like to see more cars built with features that appeal to women. I’ve heard — but I don’t know if this is true — that as soon as a particular model of car is perceived as being “girly,” men won’t buy it. Since men still constitute the majority of car buyers, sales collapse. I’ve heard this offered as an explanation of the lack of cars like the Smart car — two person vehicles that use hardly any gas, and are easy to drive and park on city streets. Smart cars are just too cute, and cute=girly, and girly is the automotive kiss of death. But what is the cost of this pursuit of masculinity?
February 18, 2011
Ron Hickman, inventor of the ubiquitous Workmate
Many people have bought and used the Workmate collapsible workbench . . . 30 million or so. The inventor, Ron Hickman, Ron Hickman, died recently:
Hickman, who lived in Jersey, was 78. His design for the wood-and-steel foldable workbench and vice was rejected by several tool companies that believed the bench wouldn’t sell.
Tool company Stanley told him the device would sell in the dozens rather than hundreds, while other companies told him the design would not sell at the necessary price. It has since sold about 30 million units around the world, and 60,000 were sold in the UK last year alone.
Hickman sold the benches himself when he couldn’t find a backer through trade shows direct to professional builders. Black & Decker saw the light in 1973 and began producing them. By 1981 it had sold 10 million benches.
He came up with the design when he accidentally sawed through an expensive chair while making a wardrobe. He had been using the chair as a workbench.
His designing skill wasn’t limited to tools: he also is credited with the design of the Lotus Elan.
February 16, 2011
Another, safer, table saw design
Table saw injuries can be quite gruesome — amputation of fingers, for example — so any new technology that might make woodworkers more safe is welcome. The first innovator in the field was the SawStop, a device that could stop the spinning blade of the saw whenever it detected human skin. Mighty impressive, but none of the major manufacturers wanted to buy the technology: it increased the cost of existing saws beyond what they thought their customers would be willing to pay. The inventor had to form a company to build his own table saws instead.
A post at the Popular Woodworking blog looks at a newer device to make table saws more safe:
Ten years ago, table saws were about to change. In 2001, you could buy a cabinet saw, such as a Delta Unisaw, a Powermatic 66 or a clone of the Unisaw made in Taiwan. Or you could get a contractor’s saw, a heavy but relatively portable table saw. Benchtop saws were not a significant part of the market, and things hadn’t changed much since the end of World War II. All the saws at the time had one thing in common: awful guards that were rarely used. Things were changing on two fronts. Underwriter’s Laboratories and the Consumer Products Safety Commission (CPSC) were looking into bringing American saw’s guard systems into the modern age, spurred in large part by a pesky woodworker from Berea, Ky., named Kelly Mehler.
Mehler was the author of “The Tablesaw Book,” and he questioned why European saws had more effective and user-friendly guards. At about the same time, Stephen Gass, an amateur woodworker and patent attorney with a doctorate in physics invented the SawStop, an imaginative and revolutionary device that could stop a spinning blade in less than a heartbeat if a flesh came in contact with it. These two ideas caught the attention of CPSC, and the long saga of what to do about the problem of table saw injuries began.
A couple weeks ago, this story was mentioned in the national media, in a brief story with scary-sounding headline in USA Today. As has happened many times in the last few years, this set off a round of emotional debate among woodworkers.
[. . .]
In the next few months the discussions and meetings between manufacturers and the CPSC will probably resume. One thing that will likely factor into this round will be alternatives to SawStop’s “flesh-detecting” technology. Last spring, the joint venture of member companies of the Power Tool Institute filed patent application 12769396. This describes an electronic detection system and a mechanism to fire an explosive trigger (similar to that used in automotive airbags) that would drop the blade below the table. An important difference to this approach is that it wouldn’t force anything into the blade, thus avoiding an expensive replacement due to an incidental firing. Also interesting is the mention of this system’s ability to tell the difference between wet wood and human flesh.
And there are several new patent applications from the SawStop inventors covering detection and deployment systems for table saws, and the possibility of using similar devices in miter saws. Will this mean new, less-expensive and less-destructive systems for table saws and other tools that will make woodworking safer, or will it mean years of waiting while the lawyers battle over intellectual property issues?
