How long before that incandescent bulb blows? This handy General Electric calculator — probably created for GE salespeople pitching the company’s wares — has the answer. Turn the bulb-cum-pointer until it alights on the socket voltage and bulb voltage, and you can quickly learn how much energy the bulb consumes, the relative cost of lighting your hovel with this particular bulb, and how long the bulb will last before it goes nova. (To shed further light on this topic, seek out the Hall of Electrical History at schenectadymuseum.org.)
No, this isn’t for tuning up your Flux Capacitor. Bristol manufactured sensors, recorders, and other instruments for companies working with liquids and gases, from water to steam to pancake batter. This handy multicolored slide let engineers quickly figure out the right valve type and size for a given fluidic situation. Bristol closed its doors years ago; according to the EPA, the company site is a heady stew of lubricants, solvents, PCBs, and other toxic byproducts. Calculate the cost of that.
When the chips are down — and you wonder if you’ll ever fill that inside straight — reach for Perrygraf’s Poker Pal. With a quick yank of the slide, you can determine what hand you need to win (in draw or stud) — and the odds of getting it. You can “what-if” with ease by setting the number of players, number of cards wanted, what’s showing on the table, and so on. In business since 1934, Perrygraf is still “THE source for innovative Slide-Charts, Wheel-Charts, Pop-Ups and other dimensional marketing products.” (To see its modern-day equivalent, slide over to poker-pal.com.)
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