The Internet Archive has a preservation copy of this work in our general collections.
Recently Patented Inventions
Bristol, Teno. This invention provides an improve ment on a former patented invention of the same in ventor, being a circuit-closing device for use in connec tion with a system employing a rotary commutator. The invention consists of a peculiar construction and arrangement of devices whereby a depressi ble bar acted upon by the car wheel is made to adjust the commuta tor to position for making the circuits, hold it in tpis position for a limited time, and then allow it to be reo stored to its normal position.doi:10.1038/scientificamerican04091892-234 fatcat:u52xujj57nffpph2hrjunt2t6q