Ben Kolo, owner of Mr. Electric of Central Iowa reveals their purpose, ‘Single-pole switches control one light ... control of a light from two locations.’ A double toggle switch like this ...

Push to make switch (PTM) is a momentary switch that closes the circuit only while pressed and is commonly used in doorbells and keyboards. Single pole, single throw switch (SPST) is a latching ...

toggle switch single pole double throw (SPDT) switch connects one input to one of two outputs allows switching between two circuits, unlike SPST version which only connects/disconnects one circuit ...