trip gear

'It was the tripping gear.

The Speed is 68rpm controlled by a Porter type governor and a Lumb regulator acting on the high pressure cylinder valves' Dobson type trip gear is fitted.

Many of these groups offer some sort of Roadside Assistance, coming to the aid stranded motorists, as well as travel materials, such as guide books, maps, destination guides, and even road trip gear.

Edwin Reynolds was the designer of the Allis company and in 1876 had developed an improved version of the Corliss valvegear, with improved trip gear capable of working at higher speeds.

The valve is opened by the mechanical valve gear mechanism, and when the trip gear trigger releases the mechanism the valve is snapped closed, usually by a spring acting against a dashpot.

Smaller stationary steam engines generally have a fixed cutoff point while, in large ones, the speed and power output is generally governed by altering the cutoff, frequently under governor control using an expansion valve or trip gear.

They can be divided into those that drove the standard reciprocating valves (whether piston valves or slide valves), those used with poppet valves, and stationary engine trip gears used with semi-rotary Corliss valves or drop valves.

As described by Somerscales (1990:283) it was 'a quick-closing valve gear using poppet valves, and a trip gear to control the cut-off ... with gravity assisted closure ... Sickels used a water-filled dashpot to decelerate the valve smoothly as it approached the end of its travel.'