Warded Locks in VS .NET

Printing QR Code JIS X 0510 in VS .NET Warded Locks

Warded Locks
Recognize QR-Code In .NET Framework
Using Barcode Control SDK for VS .NET Control to generate, create, read, scan barcode image in Visual Studio .NET applications.
Paint Quick Response Code In .NET Framework
Using Barcode generator for Visual Studio .NET Control to generate, create QR Code ISO/IEC18004 image in .NET applications.
Figure 4.2 The internal parts of
Recognize QR Code ISO/IEC18004 In Visual Studio .NET
Using Barcode reader for .NET framework Control to read, scan read, scan image in .NET framework applications.
Creating Barcode In Visual Studio .NET
Using Barcode maker for Visual Studio .NET Control to generate, create barcode image in VS .NET applications.
a typical bit key lock.
Read Barcode In Visual Studio .NET
Using Barcode decoder for .NET framework Control to read, scan read, scan image in VS .NET applications.
Creating QR In Visual C#.NET
Using Barcode maker for .NET framework Control to generate, create QR Code image in .NET applications.
Figure 4.3 The key on the right is
Generating QR Code In .NET
Using Barcode generation for ASP.NET Control to generate, create QR Code 2d barcode image in ASP.NET applications.
Making Quick Response Code In VB.NET
Using Barcode maker for VS .NET Control to generate, create QR Code image in .NET applications.
for a lock activated from one side of a door; the key on the left can pass the wards from either side.
GS1 DataBar Expanded Creator In .NET
Using Barcode creator for .NET Control to generate, create GS1 DataBar-14 image in .NET applications.
Encode Bar Code In .NET
Using Barcode generator for Visual Studio .NET Control to generate, create bar code image in VS .NET applications.
In theory, each warded lock can be designed to accept 50, or even 100, slightly different keys. In practice, these locks tend to become more selective as they age and wear. The lock might respond to the original key or to one very much like it, but keys that would have worked when the mechanism was new no longer fit. While this might seem fine and well for the lock owner, excessive wear increases the potential of both key breakage within the lock and jams in the open, partly open, or closed positions. It can also mean that a new lock will have to be installed. Most surface-mounted and mortised locks are intended to be operated from both sides of the door. Keyholes and doorknob spindle holes extend through both sides of the lock body. Occasionally you will encounter a surface-mounted lock with a doorknob spindle and keyhole only on one side. The other side is
Bar Code Creation In Visual Studio .NET
Using Barcode creation for .NET framework Control to generate, create bar code image in .NET framework applications.
Drawing UPC - 8 In VS .NET
Using Barcode creation for .NET Control to generate, create EAN8 image in .NET framework applications.
Four
EAN-13 Printer In None
Using Barcode creator for Office Excel Control to generate, create GTIN - 13 image in Microsoft Excel applications.
Creating Barcode In Java
Using Barcode maker for Android Control to generate, create bar code image in Android applications.
Figure 4.4 Case wards can be at many different positions.
Matrix 2D Barcode Creation In Java
Using Barcode printer for Java Control to generate, create 2D Barcode image in Java applications.
Reading Bar Code In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
blanked off. A lock of this type can be modified to accept a key from the other side. This modification entails cutting a keyhole through the door and lock body and may require some filing on the key. Figure 4.3 illustrates the differences in keys. Note the additional cut on the left-hand key. Operation The key must be cut to correspond to the single or multiple side and end wards that have been designed into the lock. After the key passes these wards, it comes in contact with the locking mechanism. The cuts on the key lift the lever to the correct height and throw the deadbolt into the locked or unlocked position. Turning the doorknob activates the spindle and, so long as the deadbolt is retracted, releases the door. Figure 4.4 depicts various keyhole control features that allow only certain types of cut keys to enter the keyhole. Figure 4.5 shows a key entering a keyhole. Notice that the key has the appropriate side groove to allow it to pass through the keyhole and into the lock. If you were to file off this obstruction (called a case ward), any key thin enough to pass could enter. (Some ward bit keys are quite thick.) By the same token, a very thin key can pass whether or not the side ward is present (Fig. 4.6). The common skeleton key is a prime example of this; it is thin enough to pass most case wards but it will not necessarily open the lock. Figure 4.7 shows a key engaging the bolt. While there is only one set of wards in this particular lock, the positioning of this ward gives more security than a lock with no ward or one with a ward that has been worn down to almost nothing. Repair Because it is usually cheaper to replace them, warded locks are not repaired to any great extent. You should, however, have a supply of spare parts for these locks.
EAN-13 Supplement 5 Creation In Java
Using Barcode drawer for Java Control to generate, create European Article Number 13 image in Java applications.
UPC-A Supplement 2 Drawer In Objective-C
Using Barcode creation for iPad Control to generate, create UCC - 12 image in iPad applications.
Warded Locks
Barcode Creation In VB.NET
Using Barcode generator for VS .NET Control to generate, create barcode image in .NET framework applications.
USS-128 Encoder In Java
Using Barcode creator for Android Control to generate, create UCC-128 image in Android applications.
Figure 4.5 A slot milled on the edge of the key allows the key to pass the case ward.
Figure 4.6 A skeleton key is a
key that has been ground down to bypass the case ward.
Figure 4.7 Even a single ward
limits the number of keys that can operate a bit key lock.
Four
Broken locks
The most frequent failure is a broken spring. Over a period of time, the spring may crystallize where it mates with the bolt. In addition, the wards can break or wear down into uselessness. Replace a broken spring with a piece of spring stock cut to length and bent to the correct angle. Some spring stock must be tempered before use; other springs come already tempered. If tempering is necessary, heat the spring to cherry red, then quench it in oil. You can save time by purchasing standard springs already bent into a variety of shapes that are designed to fit almost all locks. Worn or broken wards on locks with cast cases can be repaired by drilling a small hole in the case and forcing a short brass pin into the lock case. The best technique for brittle cases is to braze a piece of metal on the case at the appropriate spot and file it down to the appropriate size. Wards on locks with sheet metal cases can be renewed by indenting the case with a punch ground to a fairly sharp point. If the factory has already punched out the wards, it would be best to braze a piece of metal at the proper spot. Since most of these locks are inexpensive and offer minimal security, you should remind customers that the cost of repair may far exceed the cost of the lock. Purchasing a new and more secure lock has definite advantages. If you are already at his or her home on a call, the homeowner can save money by asking you to install a new lock immediately instead of ordering one and having you make a second trip to install it. Should the homeowner decide to take your advice and purchase a new lock, ask to keep the broken one; it is of no use to him or her and parts are always nice to have. Sooner or later you will have to repair another lock of the same type; having the correct parts at hand will save you time. Furthermore, you have made a sale and, by being allowed to keep the old lock, have obtained parts at no cost.
Copyright © OnBarcode.com . All rights reserved.