Semi Paragraph
A variation of the pantograph disconnecting switch is the semi-pantograph, also known as a vertical-reach type, which incorporates only one-half of the scissor arrangement.
Semi Pantograph Disconnector Components
Semi Pantograph Disconnector Switch (Courtesy of COELME)
Additional Resources
https://en.wikipedia.org/wiki/Disconnector
http://www.tekhar.com/Programma/Siemens/Commutacia/High_voltage/pdf_pict/leaflet_e.pdf