Figure 19.41 Lever handle trim using the popular Utica escutcheon. (Alarm Lock in VS .NET

Creating QR-Code in VS .NET Figure 19.41 Lever handle trim using the popular Utica escutcheon. (Alarm Lock

436 Figure 19.41 Lever handle trim using the popular Utica escutcheon. (Alarm Lock
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Figure 19.42 Model 121 electri-
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fied mortise lock. (Alarm Lock Corporation)
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Position the centerline of the template that comes with the lock on the height line, and mark the center point of the door thickness and the center point for the 21 8-inch hole through the door (Fig. 19.43). 2. Bore the 21 8-inch hole at the point marked from both sides of the door. Bore the 1-inch latch unit hole straight into the edge of the door from the center point of the height line. Mortise the latch front and install the latch unit (Fig. 19. 44). 3. Remove the lock from the box and remove the inside trim by inserting the small end of a spanner wrench through the hole in the knob bearing sleeve. This hole faces the latch retractor. Press the knob catch to slide the knob off the spindle and remove the rose from the threaded sleeve (Fig. 19.45). 4. Adjust for the door thickness by moving the outside rose either in or out until the indicator on the lock shows the proper thickness for the door. Make sure the rose clicks into place (Fig. 19.46). The lock will fit on all doors 13 8 to 2 inches thick. (If you need a lock for a thicker door, special order it from the company.) 5. Next, install the main unit (Fig. 19.47). The main housing must engage with the latch prongs and retractor with the latch tailpiece as shown in Fig. 19.48. 6. Secure the trim by replacing the rose and screwing it on to the threaded spindle with your fingers as far as it will go. Tighten the rose with the spanner wrench (Fig. 19.49).
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Figure 19.43 Electrified key-in-knob lock installation, Step 1.
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Figure 19.44 Electrified key-in-knob lock installation, Step 2.
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Figure 19.45 Electrified key-in-knob lock installation, Step 3.
Figure 19.46 Electrified key-
in-knob lock installation, Step 4.
Figure 19.47 Electrified key-in-knob lock installation, Step 5.
7. Replace the knob by lining up the keyway in the knob with the slot in the spindle. Push the knob straight on until the knob hits the knob catch. Depress the knob catch and push the knob straight on until the knob catch clicks into place. Test both knobs to make sure they are securely fastened to the spindle (Fig. 19.50).
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MAIN HOUSING
TURN CLOCKWISE AND TIGHTEN FIRMLY
LATCH TAILPIECE
RETRACTOR ENGAGES LATCH TAILPIECE
LATCH PRONGS ENGAGE MAIN HOUSING
Figure 19.48 Electrified key-in-knob lock installation, Step 5.
Figure 19.49 Electrified key-in-
knob lock installation, Step 6.
DEPRESS KNOB CATCH Figure 19.50 Electrified key-in-knob lock installation, Step 7. Figure 19.51 Electrified key-inknob lock installation, Step 8.
8. Install the strike by making a shallow mortise in the door jamb to align with the latch face and install the strike as in Fig. 19.51.
Reversing the cylinder
If you must reverse the lock cylinder, follow the procedure outlined in this section. First, insert the key into the cylinder and turn the key clockwise as far as it will go. At the same time, depress the knob catch retainer. When the retainer moves down, pull the knob off. Next, turn the knob 180 , and replace it as follows. Remove the key and push the knob on the spindle as far as it will go. Insert the key and turn it clockwise to its most extreme position while depressing the knob catch
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retainer. When the retainer moves down, push the knob onto the spindle, allowing the retainer to click into position.
Removing the cylinder
To remove the cylinder, first push the cylinder tailpiece sideways with your finger until the tailpiece unsnaps from the plug. Then, turn the knob over and hit the shank of the knob with a sharp blow on a flat surface. This releases the knob ferrule and permits the removal of the cylinder. Rekeying of the cylinder is conventional.
Electrical considerations
Now that you understand the specifics of installing the lock, consider its electrical components. The electrical power for the lock can either be concealed within the door by use of a current transfer unit (Fig. 19.52) or left exposed on the interior side. The use of a current transfer unit is a unique means of bringing the electrical current from the lock side of the door to the door. The face and strike must be thoroughly matched and the door closed for power to flow through. With this in place, from a remote switch activation, power will flow through, allowing the door to be opened. The other method, leaving the wiring exposed, is not really what it seems. An armored door loop is used and it provides a much easier means for bringing electrical current from the hinge side of the door frame to the lock in the door. It consists of an 18-inch, flexible, armored cable that is attached to the frame on one end and just below the lock on the inside of the door. The lock wires can be passed through the door wall via a small hole and connected to the loop wire ends. Electromagnetic Locks While electric locks are available and used for many applications, there is also a need for electromagnetic locks. Such locks can be used in hospitals, convalescent homes, banks, universities, museums, libraries, factories, laboratories, penal institutions, and airports. The electromagnetic lock, while operating at less than 12 Vdc, can exert a holding force of 1500 pounds. This is fantastic for a lock that consists of two components the lock and its armature.
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