Safety device for chain saws

In a chain saw that comprises a housing, a handle secured to said housing, said handle having a generally horizontal hand grip section extending above the housing;

• a carburetor located within said housing, said carburetor having a throttle operator arm movable through a predetermined stroke between an idle setting and a full power setting;
• a manual trigger mechanism carried on the housing;
• and link means between the trigger mechanism and the throttle operator arm;
• the improvement comprising a safety device mounted on the chain saw housing for preventing movement of the throttle arm from its idle setting;
• said safety device including a bar structure swingably mounted on the chain saw, said bar structure comprising a bar operator section extending along the aforementioned hand grip section so that when the user places his fingers around the hand grip section the fingers will contact the bar operator section to enable the user to pull said bar operator section toward the hand grip section;
• spring means acting on the bar structure to move said bar operator section away from the hand grip section;
• and a flexible wire-like connector between said bar operator section and said throttle arm;
• said flexible connector assuming a taut condition when said bar operator section is spring-biased away from the hand grip section, whereby the throttle arm is then retained in its idle setting even though the trigger mechanism is moved to a position calling for full engine power.