IṢẸ́ ỌNÀ
ẸWÀ ÀTI ÌLERA
IṢẸ́ ỌWỌ́
ÀṢÀ ÀTI ÌTÀN
ÌṢERÉ
ÀYÍKÁ
OÚNJẸ ÀTI OHUN MÍMU
REVERSE ENGINEERING
SÁYẸ́ǸSÌ
ERÉ ÌDÁRAYÁ
ÌMỌ̀-Ẹ̀RỌ
ÀWỌN OHUN WÍWỌ̀
Miniature Printing Electronic Calculator: Kilby, Merryman & Van Tassel, 1974
Jack S. Kilby, Jerry D. Merryman and James H. Van Tassel of Texas Instruments first filed for this portable calculator in 1967; the patent, US 3,819,921, was granted in 1974. It adds, subtracts, multiplies and divides. All the arithmetic and control is done by one integrated semiconductor circuit array lying flat under the keyboard encoder. Answers are printed by a thermal print head, a 3 × 5 array of heater elements on a semiconductor wafer, on heat-sensitive paper tape read through a magnifying window. The case measured 4¼ × 6⅛ × 1¾ inches and the calculator weighed 45 ounces, running on batteries.
Ilọsíwájú
Factory process
Ìlànà
1
1
Keys and encoder
Keys and encoder
Mount the 18 keys (0–9, +, −, ×, ÷, the decimal point, C for clear, E for error and P for print) in stepped holes in the upper case. Each key shaft slides in a bearing; a helix spring under the shaft head returns it, guide pins stop it turning, and a resilient pad at its base carries a thin gold-plated copper strip. Below lies the encoder: conductive strips on an insulating board, grouped so each key shorts its own set of output terminals and encodes its digit in excess-3 binary code.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Àpótí ẹ̀rọ ìṣirò apá méjì pẹ̀lú ìkọ́1 ẹyọ
Bọ́tìnnì ìpadà sípírínì pẹ̀lú pádì ìfarakanra18 ẹyọ
Pátákó olùfààmì kọ́bọ́ọ̀dù1 ẹyọ2
2
Primary electronics
Primary electronics
Mount the integrated circuit array below the encoder, in a plane parallel to it, and connect the encoder's terminals to it. The array holds the arithmetic and control sections, generating the timing signals for calculating, printing and advancing the tape.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Àkójọ ìyíká àpapọ̀ ẹ̀rọ ìṣirò1 ẹyọ3
3
Printer and tape
Printer and tape
Place the thermal print head above a resilient pressure pad, its wafer surface against the tape. Rest the tape reel on a shelf; the tape runs up through a guide block, over the pad under the print head, past the magnifying lens window and out through the side of the case. A solenoid tape-advance mechanism steps the tape on after each line: its coil pulls a pivoted clapper, a spring-biased clutch grips the tape against a clutch plate, and a drive spring pushes it forward when the coil releases. An insulating acrylic cover plate separates the shelf from the primary electronics.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Orí ìtẹ̀wé ooru semiconductor àpapọ̀1 ẹyọ
Ọ̀já bébà tí ooru ń kàn1 ẹyọ
Ẹ̀rọ ìtẹ̀síwájú ọ̀já solenoid1 ẹyọ
Fèrèsé lẹ́ńsì ìsọdi-ńlá1 ẹyọ
Pẹlẹbẹ Akrílíìkì1 ẹyọ4
4
Power
Power
Fix the batteries, the auxiliary electronics module and the tape advance on the floor of the lower case. Three 1½ volt cells in series give 4½ volts and eight in series give 12 volts; the auxiliary module drives the tape-advance coil and the print timing. Wire the supply through the on/off switch to the primary electronics, and fit a battery charger plug in the wall of the lower case. Hinge and latch the two case halves so the top lifts for access.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Sẹ́ẹ̀lì V 1.511 ẹyọ
Ẹ̀yà ẹ̀rọ itanna olùrànlọ́wọ́1 ẹyọ
Switch ìtàn/ìpa1 ẹyọÀwọn ohun-èlò
12- Àyè
- Àyè
- Àyè
- Àyè
- Àyè
- 1 ẹyọÀyè
- 11 ẹyọÀyè
- Àyè
- 1 ẹyọÀyè
Ìtọ́nisọ́nà yìí ń ṣe
Blueprint tó jọra
Àwọn blueprint wọ̀nyí pín ìmọ̀ — ọ̀nà, ohun-èlò tàbí ìlànà
CC0 Àgbègbè Gbogbogbò
Blueprint yìí ti jáde lábẹ́ CC0. O lè ṣe àdàkọ, yí padà, pín, àti lò láìsí ìyọ̀ǹda.
Ṣàtìlẹ́yìn Olùṣẹ́dá nípa rírà àwọn ọjà nipasẹ̀ Blueprint wọn Ẹ̀san Olùṣẹ́dá tí àwọn Olùtajà gbé kalẹ̀, tàbí ṣẹ̀dá àtúnṣe tuntun ti Blueprint yìí kí o sì fi sínú Blueprint rẹ gẹ́gẹ́ bí ìsopọ̀ láti pín owó-wíwọlé.