06-11-2025, 11:41 PM
This one's a minor curiosity, an Imperial L1019 in NOS condition that came my way long ago... it's one of just two out of the many Imperial models that the Vintage British Calculators collection doesn't include.
http://www.vintagebritishcalculators.inf...erial.html
Not very British, though, as it's made in Japan. As the instruction manual boasts,
"Your desk-top calculator is equipped with an extremely large liquid crystal display (LCD) as well as with a C-MOS electronic module. These two elements guarantee minimal use of energy.
Four size C (Baby) batteries will supply energy for operation of your calculator for a period of 2-3 years!"
That should be true even with frequent long periods of use, as power consumption is stated on a label underneath as 6V, 1mW.
Unfortunately, the designer ran with the infrequent need for new batteries as an excuse for an unusually wearisome procedure for changing them...
1. Remove both cross screws found on the underside of the calculator.
2. Remove both cross screws from the rear side.
3. Remove all knobs from the switches.
4. Now take off upper part of housing.
5. Replace old batteries with new ones, making sure to place poles correctly.
6. Replace upper housing, knobs of switches and reinsert and tighten all 4 screws.
http://www.vintagebritishcalculators.inf...erial.html
Not very British, though, as it's made in Japan. As the instruction manual boasts,
"Your desk-top calculator is equipped with an extremely large liquid crystal display (LCD) as well as with a C-MOS electronic module. These two elements guarantee minimal use of energy.
Four size C (Baby) batteries will supply energy for operation of your calculator for a period of 2-3 years!"
That should be true even with frequent long periods of use, as power consumption is stated on a label underneath as 6V, 1mW.
Unfortunately, the designer ran with the infrequent need for new batteries as an excuse for an unusually wearisome procedure for changing them...
1. Remove both cross screws found on the underside of the calculator.
2. Remove both cross screws from the rear side.
3. Remove all knobs from the switches.
4. Now take off upper part of housing.
5. Replace old batteries with new ones, making sure to place poles correctly.
6. Replace upper housing, knobs of switches and reinsert and tighten all 4 screws.
