|This article requires additional photographic illustration — need photos of whole unit and remaining keyboard photos|
Datanetics DC-50 series|
Futaba MD series
|Switch mount||PCB mount|
Krown Porta-printer is a series of portable teleprinters intended for use by the deaf and hard of hearing. The Porta-printer and Porta-printer II each comprised a 40% keyboard together with a miniature printer and an acoustic coupler.
The original Porta-printer and Porta-printer II keyboards used Datanetics DC-50 series switches; this was followed by a keyboard using Futaba MD series switches. Both keyboards were designed by Meryl Miller.
Datanetics switch versions
The 1975 original keyboard had dark grey keycaps.
The 1977 Porta-printer II keyboard switched to ivory keycaps. The PCB below bears the legend "KROWN RESEARCH BAUDOT KEYBOARD", along with "REV E" and "BAU-EKB-1-774".
Futaba switch version
The Datanetics Porta-printer II keyboard was followed by a version with ivory/black Futaba MD series switches. The same keycap manufacturer appears to have been used, as the keycaps are identical in design to those in the previous two keyboards.
- Southwest Museum Of Engineering, Communications and Computation — Krown Research / Krown Manafacturing
- Correspondence with Meryl Miller, 2016-12-01–02