Woodworker's Journal summer-2009, страница 66
What's This?David Carlson of Cary, North Carolina, found this tool in a box of odds and ends. Can you identify it? A. Ship's altimeter B. Saw set C. Rpm counter D. Horsepower gauge This device is a Machinist Speed Indicator. I really got excited when I saw the mystery tool in your magazine; finally, there was a tool that I recognized! Kent A. Russell Indianapolis, Indiana Old tools always seemed to have a dimple in the end of a shaft. The sharpy, pointy end of the tool would fit into that dimple. Steve Schultz Madison, Wisconsin The outer dial rotates quickly (usually one revolution per rpm of the item), and the lower dial in the window counts more slowly (usually a lOx counter), as you would find in a stopwatch. Jim Kannen Dripping Springs, Texas Answer revealed: It's C: An rpm counter Ease of use, peace of mind. Be able to bathe safely, without worry with a Premier Walk-In Bath. independence and security are only a phone call away. If you struggle taking your bath, talk to us at Premier about our extensive range of walk-in baths. • Enjoy a relaxing bath again, without the fear of slipping or falling. • The walk-in door feature allows easy access and exiting at all times when taking a bath. HuftmthPfAoiC jets soothe away your aches and pains. Hf Yes! Please send me a FREE COLOR BROCHURE about PremierWalk-ln Baths. Zip Send to: Premier Bathrooms Inc 2330 South Nova Rd., South Daytona, Florida 32119 CALL NOW-TOLL FREE 1-800-578-2899 SOURCE CODE 49049 Being lazy, I now have one that gives me a direct rpm count. Sam Polita Tucson, Arizona Where can you find a tachometer today for $1.25? On the other hand, where did machinists of 75 years ago find the courage to hold this device against a rapidly rotating shaft? Richard O. Thomas Stafford, Virginia summer 2009 73 |
