Guillotine door

Coal is fed from a front-feed hopper onto the moving grate through a guillotine door, which controls bed thickness. Nowadays a firebreak system is arranged in the... 

In the pretesting phase, animals are placed in the middle of the chamber with the guillotine door raised approx 12 cm and allowed 10 min to explore both chambers of the conditioned place preference (CPP) apparatus. 

Each animal is placed in the appropriate compartment immediately after receiving an ip. injection of the drug or vehicle. The guillotine door is closed to confine the animal to the compartment for 30 min. 

In the testing phase, no drug or vehicle is injected and the guillotine door is raised 12 cm to allow access to either chamber. The animals are placed in the middle and allowed to move about freely for 20 min. The amount of time spent in each compartment is recorded (see Note 6). 

Rg. 1.2. Batch-type furnace for melting. Angled guillotine door minimizes gas and air leaks in or out. Courtesy of Remi Claeys Aluminum. 

At the front, the muffle was closed with a guillotine-like shutter made of fireclay. In front of this shutter was an outer metal door. The bottom of the muffle consisted of a grill made of fireclay, on which the coffin was placed. The remains of the body fell through the refractory grilles into the postcombustion chamber with slanted walls narrowing down to a small cavity in which the container for the ashes was placed. 

Some early oven doors were of the guillotine type, which could be raised or lowered vertically with a simple hoist. These were replaced when machinery was developed to install and remove doors horizontally with the door in a vertical position. All the early doors were sealed with a clay-water mixture known as luting material. Most oven doors are self-sealing a thin metal strip on the door is pressed against the metal doorjamb by screw or spring pressure exerted against door latches. 

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