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US2776575A
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V-belt pulley drive
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US2770978A
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Means for balancing the loads on parallel belts
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US2703986A
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Balanced variable-speed power unit
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US2613545A
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Speed-varying power transmission
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US2638007A
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Edge-active belt
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US2581328A
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Constant tension control
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US2647410A
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Magnesium-alloy-block edge-active driving belt
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US2608741A
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Constant tension control
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US2647965A
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Constant tension means with mechanoelectrical torque-responsive control
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US2636396A
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Adapter control assembly for variable-speed power transmission
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US2582067A
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Speed-varying power transmission assembly
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US2640365A
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Low-friction variable pulley disk mounting
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US2571920A
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Variable-speed drive control for spinning frames
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US2549637A
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Self-contained, speed-varying countershaft unit
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US2595203A
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Multiple expansible pulley unit
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US2516829A
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Sheet metal expansible pulley
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US2507904A
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Constant tension speed-varying control for spinning frames or the like
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US2472046A
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Braking means for electric motors
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US2470937A
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Electric motor preset control
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US2410155A
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Propeller governor tester
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