By Brooke Stauffer, John Traister
It is a bit easy point of information for feild engineers yet
it's very priceless info~~
Read or Download Electrician's Troubleshooting and Testing Pocket Guide PDF
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Extra info for Electrician's Troubleshooting and Testing Pocket Guide
These are usually pried off with a screwdriver. Thereupon the plunger becomes visible and can be depressed with a pen knife blade. Notice should be taken of any release button or lever near the handle of the drawer. Even though in an unlocked position, the drawer will not pull open unless this button is pressed. To try it would be similar to opening an unlocked door without turning the knob. The better type filing cabinet is of fire resistant construction with overlapping edges that prevent the insertion of blades or jimmies between the drawers and frame.
The object of the rubber band (A in Fig. 27) is to create tension toward the open end of the track. By slipping his arm through the door opening, the Locksmith can tie the band around the sliding anchor. He then extends the rubber as far as he can stretch it in a straight line toward the center of the door. The band should then be looped over the thumb tack (B in the illustration) which should be firmly imbedded in the door. A small string or thread tied to the tack and held by the lock smith will aid in retrieving it if it should fall out during the operation.
These rods are usually underneath and to the rear of the side drawers. By reaching under, one can feel a wooden or steel rod. Raising this releases all of the drawers on one side. An extension of this rod can be found at the back end of the guide on either side of the center drawer. Just lift, or depress the extension, and one side of drawers will be free to open. A pair of pliers or a jimmy will be needed to remove or bend the plates that some manufacturers have installed to prevent access to these rods.
Electrician's Troubleshooting and Testing Pocket Guide by Brooke Stauffer, John Traister