Krown Porta-printer
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| Layouts | Proprietary |
|---|---|
| Keyswitches |
Datanetics DC-50 series Futaba MD series |
| Switch mount | PCB mount |
| Keycaps | Double-shot spherical |
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.
Contents
Keyboard
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.[1]
Datanetics switch versions
Porta-printer
The 1975 original keyboard had dark grey keycaps.
Porta-printer II
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".
Top
Top, showing switches
Left-hand side, with switch close-up
Right-hand side, marked "REV E" and "BAU-EKB-1-774"
IC dates (7709 and 7651)
_--_top.jpg)
_--_top_with_switches.jpg)
_--_LHS_with_switches.jpg)
_--_RHS.jpg)
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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.
Side view of switches
Top view of switches
_--_switches,_side.jpg)
_--_switches,_top.jpg)
External links
- Southwest Museum Of Engineering, Communications and Computation — Krown Research / Krown Manafacturing
References
- ↑ Correspondence with Meryl Miller, 2016-12-01–02
