Clare, Pendar and General Instrument
CP Clare, Pendar, Clare-Pendar and General Instrument have together a complex and still poorly-understood history. See history for some outdated notes.
The North American and European products had some crossover in the form of the low-profile reed switches, but were otherwise separate. US-made switches were sometimes branded CP Clare, Clare-Pendar or GI, but are often found branded only as “ASM MEXICO”. The latter obscures which of the various brands the switches were marketed. It is not clear why the branding was removed, as it seems that this occurred prior to the sell-off of the switch manufacturing.
|SF/SG/SH/SI/SK||Clare, Pendar||Reed (high-profile)|
|SFL/SGL/SIL||Clare, Pendar||Reed (low-profile)|
|S700||“ASM MEXICO”||Low-profile foam and foil with hysteresis; the sliders are marked “ASM MEXICO” while the PCB bears the series name and “General Instrument Computer Products Division”|
|S820||Clare-Pendar||Reed (tall); a later design has been found marked both “CLARE-PENDAR” and “ASM MEXICO”|
|S830||Clare-Pendar, G.I.||Reed (tall)|
|S840||“ASM MEXICO”||Metal contact|
|S880||None; “ASM MEXICO”||Reed (short)|
|S890||CP Clare, “ASM MEXICO”||Foam and foil|
|S950||General Instrument||These are a derivative of Alps KCC/SKCC series, and may have been manufactured by Alps on behalf of General Instrument.|
The modifications chart also mentions S860 series but Electro-Mech have no documentation on this.
Furieux Furet, who made just one post to Deskthority in July 2019, found an unidentified switch in a “Pendar” keyboard. There is only one photograph. As the person who wrote the post is located in France, the suggestion is that this is a French-made keyboard. The switch—with its pair of safety-pin–shaped external springs—looks like it may be foam pad capacitive.
- Clare-Pendar K353 53-key teletypewriter keyboard (on sale for the thrifty price of only $3,500); the switches are not specified in the parts of the datasheet visible, but may be S820 (the depicted item is ca. 1973); there is also a model K453 according to the listing
Some North American–made products have “97564” moulded into them or stamped on them, which at least one supplier has since mistaken for a manufacturer part number. This is in fact the CAGE (Commercial and Government Entity) code. Depending where you look, this number has been applied to:
- Clare-Pendar (moulded into S830 switches which are Clare-Pendar branded)
- General Instrument Corp., Computer Products Division (one of 16 separately-numbered General Instrument divisions listed on bjg-design.com)
- Pollak Corp (according to most sites); also listed in full as POLLAK CORP (TRANSPORTATION ELECTRONICS DIV)
- Electro-mech Components, Inc. (per AeroBase Group)