Stop Blocks

Co., .- w,...ors should be stopped periodically to check for wear. The inspection may occur every few months. To accomplish this the compi sor must be stopped, blocked in, and purged if the gas is hazardous valve is removed from the cylinder and a feeler gauge inserted throi the valve opening. A measurement is taken between the lower side of piston and the cylinder wall. 

Figure 7-5. Sliding behavior in static and kinetic friction. 1 Plate moving. 2 Block moves with plate. 3 Block slides on plate. 4 Plate and block stop. 5 Plate stops block slides back.

Ail boilers and piping systems, either part of or on pile-driving equipment, will have overhead protection, guards, and stop blocks. A blocking device... 

Should this profile be distorted it may indicate that there is a problem with the smooth and rapid flow of the reagents, possibly syringes sticking or the viscosity of the solutions not permitting the solutions to accelerate fully to the desired velocity. Alternatively the pressure is low. Check the pneumatic pressure, clean the system as recommended. Possibly the apparatus needs to be adjusted to deliver more of each solution by moving the. stopping block. 

Stop blocks shall be provided for the leads to prevent the hammer from being raised against the head block. 

Are properly secured stop blocks provided to prevent tipping vehicles falling in ... 

Hysteresis at end of experiment Damage to block, test stopped Block slipped out, test stopped Power failed at 160,000 cycles Thermocouple failed, temperature still rising Thermocouple failed, temperature levelling off... 

Dies should not close against stop blocks or other restraints. The blank must be the only stop the die sees when stamping. Safety stop blocks, used to prevent empty die halves from crashing against each other, should be designed to provide a 0.020-in. distance between die halves. 

GRTP cannot be stamped in molds sitting on stop blocks. Stop blocks must be designed for safety purposes only, i.e., to prevent the empty mold surfaces from cracking into each other. Therefore, stop blocks, pin retractors, keys, heelblocks, spacers, etc., must permit the empty mold to close within 0.020 in. 

Other special circumstances where a permit system is appropriate include work on overhead travelling cranes and on chemical plant. Contractors should be aware that, for these cranes, analysis of accident causes shows that an effective safety system must prevent the crane from approaching those working in the area. Complete electrical isolation together v/ith the use of stop blocks on the crane tracks are the precautions required to achieve this. 

Locos and rolling stock left parked on the main haulage without stop blocks or chain sprags etc. This was even the case where tracks were on the downgrade toward the tip. 

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