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The stackfreed was an eccentric cam mounted on the mainspring arbor, with a spring-loaded roller that pressed against it. The cam had a 'snail' shape so that early in the running period when the mainspring was pushing strongly, the spring would bear against the wide part of the cam, providing a strong opposing force, while later in the running ...
[citation needed] Spring characteristics: (1) progressive, (2) linear, (3) degressive, (4) almost constant, (5) progressive with knee A machined spring incorporates several features into one piece of bar stock Military booby trap firing device from USSR (normally connected to a tripwire) showing spring-loaded firing pin. A spring is a device ...
A roller shutter, security shutter, coiling door, roller door or sectional overhead door is a specialized type of door or window shutter consisting of multiple horizontal slats, bars, or web systems interconnected through hinges. The mechanism involves lifting the door to open it and lowering it to close.
Various window blind styles. A window blind is a type of window covering. [1] There are many different kinds of window blinds which use a variety of control systems. A typical window blind is made up of several long horizontal or vertical slats of various types of hard material, including wood, plastic or metal which are held together by cords that run through the blind slats.
Federal authorities executed a search warrant Tuesday in St. Louis in connection with an investigation in Puerto Rico of a tourist accused of setting businesses on fire last week.
"Sounds like he’s screaming on a roller coaster," kidded someone else. "He’s just like a toddler when you hold them by the arms and spin around," another one quipped.
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