Computer History Museum

Manual shifting of the carriage for multiplication, and automatic division. Fully functional. With Operator's Manual.

Type
Physical Object
Catalogue number
102622184
Monroe LA7

Object consists of record and case.

Type
Audio
Format
Phonograph Record
Catalogue number
102716389
Sur Minitel

These are two vacuum tubes, type 6EJ7, manufactured by Airline, with 9 connector pins.

Type
Physical Object
Catalogue number
102731057
Vacuum tube type 6EJ7

These are two vacuum tubes, type 6EJ7, manufactured by Zenith, with 9 connector pins.

Type
Physical Object
Catalogue number
102731058
Vacuum tube type 6EJ7

These are two vacuum tubes, type 6EH7, manufactured by Zenith, with 9 connector pins.

Type
Physical Object
Catalogue number
102731073
Vacuum tube type 6EH7

The record contains a nine pin miniature vacuum tube, type 6DX8/ ECL84.

Type
Physical Object
Catalogue number
102731150
Vacuum tube type 6DX8/ ECL84

This tube is a digital counter enclosed with a glass envelope with a 12-pin phenolic base. The counter is advanced by electrostatic deflection. This created a narrow electron beam that moved through a small aperture in the target electrode and strikes a green phosphor target on the glass envelope. The target had the numerals "0" through "9," giving an indication of the current count. This object is enclosed in the original box, which is in fair shape and included with the artifact.

Type
Physical Object
Catalogue number
102732453
Vacuum tube counter/display type 6370 EIT

The record contains a dual voltage charger with a standard American wall plug on its body. There is a cable extending from the body of the charger, which ends in a two connector plug.

Type
Physical Object
Catalogue number
102732541
Charger

This object is a 10 digit cold-cathode display in a small glass enclosure. The display consists of a round metal plate with the digits "0" through "9" cut around the perimeter. A voltage applied to a flat electrode below a digit causes it to glow. The number is read from the top of the tube. There are 13 pins extending from the bottom of the envelope.

Type
Physical Object
Catalogue number
102732560
Vacuum display tube type ZM1050

Type
Physical Object
Catalogue number
B299.80
Monroe electrical calculator

Nixie tubes such as these ones were used extensively as numeric displays in electronic instruments and computer equipment until they were supplanted by vacuum fluorescent and LED technologies in the mid- 1970s. They were invented at Burroughs. More elaborate Nixie-style tubes (ones with n segments) could display alphnumeric characters and a few speacial symbols as well. The term "Nixie" grew out of an internal Burroughs name for the tube, the "Numeric Indicator X (or ten)," abbreviatred to "NIX tube" and eventually to "Nixie." Donor note: "Philips BV of Holland started manufacturing Nixie-style tubes under license from Burroughs around 1956. Later, Philips had their American division Amperex make these tubes in their Brooklyn factory. Whereas Burroughs Nixies had separate pins for each electrode (requiring special sockets), Philips used the standard 9-pin miniature tube base on their ZM1030 series. Since this kind of tube would require at least 11 pins to accommodate the 0-9 digits and the anode, Philips engineers devised a way to multiplex the odd and even digits onto the same 5 pins, thus requiring only 7 pins total. The ZM1005 was the smallest Nixie type ever made, and was developed for electronic calculators and portable test equipment. It used a special socket which was unique to it."

Type
Physical Object
Catalogue number
X1589.99A
Subminiature Nixie tube

Nixie tubes such as these ones were used extensively as numeric displays in electronic instruments and computer equipment until they were supplanted by vacuum fluorescent and LED technologies in the mid- 1970s. They were invented at Burroughs. More elaborate Nixie-style tubes (ones with n segments) could display alphnumeric characters and a few speacial symbols as well. The term "Nixie" grew out of an internal Burroughs name for the tube, the "Numeric Indicator X (or ten)," abbreviatred to "NIX tube" and eventually to "Nixie." Donor note: "Philips BV of Holland started manufacturing Nixie-style tubes under license from Burroughs around 1956. Later, Philips had their American division Amperex make these tubes in their Brooklyn factory. Whereas Burroughs Nixies had separate pins for each electrode (requiring special sockets), Philips used the standard 9-pin miniature tube base on their ZM1030 series. Since this kind of tube would require at least 11 pins to accommodate the 0-9 digits and the anode, Philips engineers devised a way to multiplex the odd and even digits onto the same 5 pins, thus requiring only 7 pins total. The ZM1005 was the smallest Nixie type ever made, and was developed for electronic calculators and portable test equipment. It used a special socket which was unique to it."

Type
Physical Object
Catalogue number
X1589.99B
Subminiature Nixie tube

Nixie tubes such as these ones were used extensively as numeric displays in electronic instruments and computer equipment until they were supplanted by vacuum fluorescent and LED technologies in the mid- 1970s. They were invented at Burroughs. More elaborate Nixie-style tubes (ones with n segments) could display alphnumeric characters and a few speacial symbols as well. The term "Nixie" grew out of an internal Burroughs name for the tube, the "Numeric Indicator X (or ten)," abbreviatred to "NIX tube" and eventually to "Nixie." Donor note: "Philips BV of Holland started manufacturing Nixie-style tubes under license from Burroughs around 1956. Later, Philips had their American division Amperex make these tubes in their Brooklyn factory. Whereas Burroughs Nixies had separate pins for each electrode (requiring special sockets), Philips used the standard 9-pin miniature tube base on their ZM1030 series. Since this kind of tube would require at least 11 pins to accommodate the 0-9 digits and the anode, Philips engineers devised a way to multiplex the odd and even digits onto the same 5 pins, thus requiring only 7 pins total. The ZM1005 was the smallest Nixie type ever made, and was developed for electronic calculators and portable test equipment. It used a special socket which was unique to it."

Type
Physical Object
Catalogue number
X1589.99C
Subminiature Nixie tube

There is a sticker reading "Carroll's Office Machines" on the front. Object has an electric cord.

Type
Physical Object
Catalogue number
102626816

"Activenture Corp. and Grolier Electronics Enycl" are handwritten on the label.

Type
Physical Object
Catalogue number
102747871

Type
Still Image
Format
Negative
Catalogue number
102755222