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The Geneva drive or Geneva mechanism is a gear mechanism that translates a continuous rotation movement into intermittent rotary motion. The rotating drive wheel is usually equipped with a pin that reaches into a slot located in the other wheel (driven wheel) that advances it by one step at a time. The drive wheel also has an elevated circular ...
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The tolerance in the manufacture of the fabric risers and their connection to the rings is critical in maintaining the mechanical advantage of the 3-ring system and this has been compromised in some designs. Reversed risers placing the rings under the risers has prevented the rings moving freely and releasing under some cutaway scenarios.
The marine riser is connected to the wellhead on the sea bed and therefore the tensioner must manage the differential movements between the riser and the rig. If there were no tensioner and the rig moves downward, the riser would buckle; if the rig rises then high forces would be transmitted to the riser and it would stretch and be damaged.
Chafing of lines that rest on a choke on a boat can be prevented by putting a protecting material around the line. Traditionally ropes were wrapped in canvas and lubricated with tallow ; however, plastic sleeves or pipes (sometimes as simple as a piece of old garden hose ) are more common in recent times. [ 3 ]
Memorial services are set to take place this week for a sophomore Otterbein University wrestler who died from injuries he suffered in a car crash earlier this month. Joshua Taylor died on Thursday ...
Kelly Clarkson isn’t visiting any ghosts of Christmas past this holiday season.. On Thursday, Dec. 19, the Grammy winner, 42, appeared to throw shade at her ex-husband Brandon Blackstock in a ...
The Plastiki is a 60-foot (18 m) catamaran made out of 12,500 reclaimed plastic bottles and other recycled PET plastic and waste products. [2] Michael Pawlyn [3] of Exploration Architecture worked on the concept design with David de Rothschild and helped to shape some of the key ideas.