Ads
related to: swing gate wheels for wooden gates replacement parts list in order pdf
Search results
Results from the WOW.Com Content Network
Wheels are typically made of a three-layer sandwich. The outer layers, known as the wheel case, contain the gate and surround the externally-toothed wheel center, change key cam, and lever arms. When a change key is inserted into the lock mechanism, it forces apart the lever arms, which then permits the wheel center to rotate freely.
A swing bridge (or swing span bridge) is a movable bridge that can be rotated horizontally around a vertical axis. It has as its primary structural support a vertical locating pin and support ring, usually at or near to its center of gravity, about which the swing span (turning span) can then pivot horizontally as shown in the animated illustration to the right.
The moving part or parts of a gateway may be considered "doors", as they are fixed at one side whilst opening and closing like one. [2] A gate may have a latch that can be raised and lowered to both open a gate or prevent it from swinging. [3] Gate operation can be either automated or manual. Locks are also used on gates to increase security.
Parts of a wheel. The basic parts of a wooden wheel are nave (or hub), spokes, felloes (felly) and tyre (tire). [3] [4] The nave is the central block of the wheel. In a wooden-spoked wheel, the nave acts as the hub. One end of each spoke is set into the nave in a process called tennoning. In older wheels, the nave had a 6-inch sleeve that fit ...
Electric gates alone, however solid and imposing they may be, cannot guarantee a completely secure environment electric locks, are often needed to boost the locking effectiveness of the gate motors. Electric gates are recommended to be used in combination with other security features to install a full security system.
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
Bar gates, especially manually operated ones, are often counterweighted to allow easier manual control. [7] Bar gates are frequently paired end to end or closely offset to block traffic in both directions. Some bar gates also have a second arm which hangs 30 to 40 cm below the upper arm when lowered to increase approach visibility.
The original gate machinery consisted of a huge drive wheel, powered by an electric motor, to which was attached a connecting rod, which in turn attached to the middle of the gate. [8] The gates are hollow and buoyant, much like the hull of a ship, and are so well balanced that two 19 kW (25 hp) motors are enough to move each gate leaf.
Ads
related to: swing gate wheels for wooden gates replacement parts list in order pdf