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The Navigation Computer Corporation, later NAVCOR, Inc. and as KDI Navcor, Inc., was an American electronics manufacturer. Their output included reed switches and reed switch–based keyboards.



Patent Title Filed Published Product
US 3244847 Manually operated keyboard switch in a stationary mount with guided shaftway 1964-05-22 1966-04-05 Mechanical keyboard switches
US 3233061 Magnetically detented keyboard switch 1964-10-05 1966-02-01 Unidentified reed switch type
US 3251962 Precision magnetic keyboard switch 1965-05-17 1966-05-17 KM Keys reed switches
US 3456077 High speed electronic keyboard assembly 1965-09-22 1969-07-15 Keyboard encoding circuitry
US 3311210 Sloping panel keyboard mount 1965-10-12 1967-03-28 Slanted base for keyboard switches
US 3664014 Universal modular printed circuit magnetic reed keyboard switch assembly 1969-08-14 1972-05-23 KRM reed switches
US 3594487 Contactless electronic keyboard array 1969-08-25 1971-07-20 Switchable transformer contactless keyboard
US 3601728 Printed circuit key improvement 1969-10-03 1971-08-24 Later style reed switches


Series 1010 Tapewriter

The Series 1010 Tapewriter is a tape punch unit with an integrated keyboard. Advertised in 1963, it is not clear what switch type these machines use: the article describes it as having “a single gold-plated, etched-circuit board for the mounting of precious-metal wiping contacts that are activated by magnetic keys”. Encoding is provided by a diode matrix.

Series 1050

Series 1050, also Model 1050 and simply 1050, is a standalone keyboard with reed switches. 1050 Series is included in the article Manual Input Devices in Computer Design magazine in December 1965 (CD1965-MID); a NAVCOR advertisement covers both 1050 and KM Keys reed switches, with the possible suggestion that KM Keys are used in the 1050. An optional diode matrix board can be fitted for character encoding, with up to 15 output bits per key. Model 1050 is the full-size keyboard, and model 1050N is a 16-key numeric keypad.


Model 1067 uses KRM switches.


KM Keys

KM Keys is Navcor’s older reed switch type, with a cylindrical shell. These are rated to 100 million operations, and were offered in “switch closure or pulse outputs” and have a “magnetic hysteresis band [that] prevents make/break microphonics.” KM Keys were advertised in Computer Design magazine in December 1965 (CD1965-MID). US patent 3251962 filed in May 1965 covers this series.


KRM is a series of reed switch with an internal PCB to which the reed capsule is attached. US patent 3664014 filed in August 1969 with an earlier priority date of October 1967 covers this design. KRM switches were used in the model 1067 keyboard. Up to four reed capsules are supported, although on each side of the switch the reed capsules share a single common terminal. The switches are fitted with a sloped base.

Later type

The designation of these switches is unknown. They are simply described as “Navcor magnetic reed” on the Deskthority wiki. This later design is depicted in US patent 3601728 filed in October 1969. Unlike KRM, there is no printed circuit board holding the reed capsule. Alternate action is supported. According to the Deskthority wiki, these switches are only known from some unspecified “Teletype replacement keyboard”.


The following documentation was all scanned by Bitsavers.