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Voltage Selector Assembly

IP.com Disclosure Number: IPCOM000043390D
Original Publication Date: 1984-Aug-01
Included in the Prior Art Database: 2005-Feb-04
Document File: 2 page(s) / 48K

Publishing Venue

IBM

Related People

Joy, EF: AUTHOR [+3]

Abstract

Electrical equipment adaptable for operation with either 110-volt or 220-volt power sources requires protection against having the line cord plugged into one voltage receptacle when the power supply circuits inside the equipment are adapted for receiving the voltage associated with the other receptacle. The slidable cover plate and switching assembly described here is designed to prevent such "human error". Plate 1 fastens slidably to the equipment frame 2 via slots 3 and screws 4. In the illustrated position, with the screws close to the lower ends 5 of the slots, opening 6 in the plate aligns with and affords external access to the 110-volt receptacle 7. In the extreme opposite position, with the screws close to the upper ends 8 of the slots, opening 9 in the plate aligns with the 220-volt receptacle 10.

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Voltage Selector Assembly

Electrical equipment adaptable for operation with either 110-volt or 220-volt power sources requires protection against having the line cord plugged into one voltage receptacle when the power supply circuits inside the equipment are adapted for receiving the voltage associated with the other receptacle. The slidable cover plate and switching assembly described here is designed to prevent such "human error". Plate 1 fastens slidably to the equipment frame 2 via slots 3 and screws 4. In the illustrated position, with the screws close to the lower ends 5 of the slots, opening 6 in the plate aligns with and affords external access to the 110-volt receptacle 7. In the extreme opposite position, with the screws close to the upper ends 8 of the slots, opening 9 in the plate aligns with the 220-volt receptacle 10. When receptacle 7 is accessible to receive a line cord through opening 6, receptacle 10 is inaccessible, and conversely, when receptacle 10 is accessible through opening 9, receptacle 7 is inaccessible. In mounting the plate, slot 11 on the plate interior is aligned with the operating lever 12 of switch 13, causing the switch to be thrown either to a 110-volt position or a 220-volt position in correspondence with the plate alignment and receptacle exposure. The switch connects a doubler (not shown) for 110-volt or 220-volt operation, and through a relay (not shown) connects a power supply transformer (not shown) inside the equipment fo...