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Mallory Clutch-Type Potentiometers
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What drew my attention with this P.R. Mallory & Company advertisement appearing in a 1947 issue of Radio News magazine was not one of the actual electronic components for which they are most noted - potentiometers, capacitors, switches, metal alloys, and of course batteries (later renamed Duracell). Rather what interested me was the huge variety of standard potentiometer and rotary switch extension shafts Mallory manufactured. Unlike modern electronics where pots and switches are typically mounted to the enclosure with wires running to the circuit assembly, many older radios and televisions had all components mounted on a metal chassis with control extensions reaching to front-panel mounted dials and knobs. As an aside, Philip Rogers Mallory began his company manufacturing tungsten wire for lamps. Believe it or not, people are selling these vintage advertisements on eBay; well, at least they're trying to sell them. Mallory Advertisement
Mallory offers the widest range of resistance values in clutch type controls to fit every need. Four different values are available in the Universal Midget line (100M ohms, 250M ohms, 500M ohms, 1 megohm), and eight values in popular combinations of overall and tap resistances in our Tapped Midget line. Add these to the Plug-In Shafts you see at the right, and you can replace original controls in any auto set you name - not merely replace them but duplicate them mechanically and electrically. Get the complete story from your Mallory distributor. You Expect More ... and Get More ... from Mallory No Wobble - this ring prevents it! All Mallory Plug-In Shafts are made with a small ring as shown above. That's why they can't wobble or work loose - why they fit as securely as a fixed shaft. Insist on Mallory - the Complete Control Line P.R. Mallory & Co., Inc. Mallory Vibrators ... Vibrapacks* ... Capacitors .. Volume Controls .. Switches .. Resistors .. Filters ... Rectifiers ... Power Supplies. * Reg. U.S. Patent Off. Approved Precision Products P.R. Mallory & Co., Inc., Indianapolis 6, Indiana
Posted July 20, 2022 |
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