A combination lock is a type of lock in which a sequence of numbers or symbols is used to open the lock. The sequence is usually a specific permutation rather than a true combination. The sequence may be entered using a single rotating dial which interacts with several discs or cams, or by using a set of several rotating discs with inscribed numerals which directly interact with the locking mechanism.
Multiple – dial locks
One of the simplest types of combination lock, often used in low-security situations is the bicycle lock, which uses several rotating discs with notches cut into them. The lock is secured by a pin with several teeth on it which hook into the rotating discs. When the notches in the discs align with the teeth on the pin, the lock can be opened. This lock is considered to be one of the least secure types of combination lock.
Opening a multiple-dial lock without the combination depends on the slight irregularities in the machining of the parts. Unless the lock is machined precisely, when the pin is pulled outward, one of the teeth will pull more strongly than the others on its corresponding disc. This disc is then rotated until a slight click is heard, indicating that the tooth has settled into the notch. The procedure is repeated for the remaining discs, resulting in an open lock, and a correct combination, in very little time.
Combination locks found on padlocks or safes may use a single dial which interacts with several parallel discs or cams. Customarily, a lock of this type is opened by rotating the dial clockwise to the first numeral, counterclockwise to the second, and so on in an alternating fashion until the last numeral is reached. The cams typically have an indentation or notch, and when the correct combination is entered, the notches align, allowing the latch to fit into them and open the lock.
Combination locks of this type are generally more secure than the multiple-dial lock, but some of them do have weaknesses. For example, early combination padlocks made by Master lock could be cracked by pulling on the shackle of the lock and turning the dial until it stopped; each numeral in the combination could be revealed in this manner.
Today’s technology has made setting up security precautions such as security cameras a cinch! You no longer need to be a millionaire to set up one. You could even install one yourself! Security cameras provide a means for its owner to watch over his or her propery from the safety and convenience of any area he chooses. This type of system is a great deterrent to thievery and unwanted entry. Most organizations that have sensitive items or are off limits to the general public employ these cameras to help keep their places safe.
Purchasing and implementing such a system may save your business from the terrors of illegal entry. Investment in such could save you a whole lot of trouble.
Before purchasing a system, you will want to consider the following factors.
Study your needs. The type of security measures installed will depend on your specific security needs. For example how large is the area you would like covered? How many cameras will it take to monitor this area? You must make sure the security camera system you will purchase can accommodate enough slots for expansion.
Do you need audio too? Some camera systems have audio recording equipment as well so you can not only see what happens, but hear it as well. This is important in cases when you would like everything documented. However, this may be costly. Many establishments only require video records of their security.
Also, you must ascertain whether you need to have your security cameras record in color or black and white. Color cameras are, of course, more sophisticated and show a clearer picture. However, they tend to be pricey. Color cameras might also not work in low-light situations.
Consider the location of the cameras. Will the location be hard to set up a wiring system in? In that case, you may want to consider wireless security camera systems. However, these cameras must be in a place that is conducive to high quality broadcast. There must be no interference. They can, though, be moved around the area. They are a bit more flexible than their fixed-wire cousins.
Will the camera system be for outdoor purposes? Cameras that monitor outdoor locations need special weatherproof housings and may not be recommended for extreme temperatures and various elements. Also those that may be vandalized must be protected against such.
Also, you must take in consideration the lighting for an area. If your camera cannot record a scene due to bad lighting, you will end up with muddy images that won’t help in your surveillance activities. Choose a security camera that has a good sensitivity to light. Also, try to illuminate such areas with external lighting.
A fire alarm system alerts people in the building of a possible fire. They help protect those inside by notifying them that they need to evacuate for safety. Most fire alarm systems will also automatically notify the nearest emergency personnel so they can take care of the fire.
Fire alarms can be triggered by smoke detectors, heat detectors, or manually. They are generally set to detect levels of smoke or heat that may indicate a fire. There is a loud bell that sounds to alert those in the building. This may also come with lights that blink in case of someone who is hearing impaired. There are many models of fire alarm systems on the market. Research for which one is best can be done on the Internet or by doing a search in your local area for manufacturers. Many fire alarm systems come bundled with intruder alert systems for maximum safety and protection of your home.
There are two costs to a system. The cost of the equipment can either be purchased or leased. The system will need to be installed which may also add a one-time fee. Systems start at approximately $20.00 for basic models and range up to $2,000.00 for more sophisticated models. For home use, a basic system with monitoring is usually sufficient. These will range anywhere from $100.00 to $300.00.
Because the system will alert the local fire department, there is also a monitoring fee generally paid monthly. These are typically inexpensive and cost approximately $30.00 per month. The one time expense of the equipment, installation, and the regular payments for monitoring are a valuable investment. Considering the costs associated with fire damage or the tragedies of losing a life in a fire, the investment is well worth it.
It is important to know what to do in case the alarm goes off. Fire drills are helpful in ensuring everyone in the family knows what to do. Practice this at least annually. If there is a small fire, one person should be in charge of using a fire extinguisher while the others leave the area. For a larger fire, everyone should immediately evacuate the premises and gather at a predetermined location. Once everyone is there, a count should be taken to ensure everyone is out safely.
A fire alarm system should be tested annually to ensure it is working properly. Notify the fire department of this before testing so they do not come out needlessly. False alarms are often charged to the consumer to account for the time wasted. A fire alarm system is a valuable investment. It can help provide safety and security to your family and home.
Home security monitoring does not mean that there will be 24 hour a day surveillance of your home to ensure that your home is protected from a burglar. At least it does not mean that in a literal sense but home security monitoring does provide you and your family 24 hour a day protection from burglars and in some cases, even fire. The level of protection that you receive will depend on the complexity of your home security system and the capabilities of the security provider you have chosen. The one thing in home security monitoring that is relatively similar no matter which provider or system you choose is the sequence of events that occur while the security system is in use. This article will provide a brief synopsis of how home security monitoring works.
Just about every home security monitoring system is activated as the first step in the process. Usually the homeowner pushes a button or series of buttons on the keypad to turn on the security system. This sends the message that the security system should trigger if it is breached in any way. Once this happens the various components of the home security system are activated. This may include access contacts, motion detectors, security cameras and any other components of the home security monitoring system. These components remain activated until the homeowner returns home and deactivates the home security monitoring system. Again, this is usually accomplished by typing in a series of numbers in the keypad.
If there is a breach of security, the home security monitoring system will begin a sequence of events. In most cases the first event, upon detecting an intruder, is to sound a warning alarm. This is usually a low level alarm and the intent of sounding this alarm is to allow the home owner the opportunity to deactivate the alarm when they return home. The homeowner usually has approximately 30 seconds to deactivate the alarm before the home security alarm system takes the next step.
If the alarm is not deactivated two things happen simultaneously in the home security monitoring system. A loud alarm is sounded and a message is sent to the monitoring station that there has been a breach of security in the home security monitoring system. This message reaches personnel at a 24 hour per day monitoring station who respond to this message. The first response is to contact the homeowner to determine whether or not the home security monitoring system has been breached or it was a false alarm. If the homeowner does not respond to the home security monitoring personnel and supply them with a security password, the staff will contact the local police department and send them to your address.
Home security monitoring is a precise service that has a clear path of action. Most home security monitoring companies react and proceed in a very similar fashion when a security system in their network is breached. While each home security monitoring company may have differences they all generally work in the same way.