All content copyright Tom Rubenoff 2010-2021
Although Adams Rite tech support might not want to talk about it*, depending on who you talk to there, the 4510 series latch lock, like its predecessor the 4710, is, in fact, field reversible. Following are the steps to do so. First, try to choose a clean work surface in an enclosed space, just in … Continue reading “Field Reversing the Adams Rite 4510 Latch”
I had a lot of fun recently trying to meet a customer’s requirement for a 4-foot by 7-foot pair of doors in a hospital that needed to be fire rated and automated. I found that Corbin and Yale (sister companies whose exit devices are almost identical) offer fire rated surface vertical rod exit devices with … Continue reading “Quest for the 24-Inch Exit Device with Electric Latch Retraction”
According to IR tech support, the PS914RFK is a bracket and main board assembly designed to install into existing PS873 enclosures. The idea is to ease PS873 replacement and it looks to me like it will accomplish that. In addition to the PS873, you will need to replace all existing option boards that are present. … Continue reading “New PS914RFK Retro-fit Kit from Von Duprin”
Below top: Dorma TS93 / middle: Sargent 422 / bottom: Norton 2800ST Cam Action Advantages High Efficiency: According to Sargent, their model 422 cam action closer “has the highest efficiency of any surface mounted door closer on the market today. This means that a door equipped with this closer will feel light to open and … Continue reading “Cam Action Door Closers”
Von Duprin concealed cable devices have been around a while and are becoming more popular. In addition to 98/99 series devices, they also offer 33/35 series concealed cable devices. According to Allegion, these are the main advantages of concealed cable: Designed to maintain positive latching even if alignment is not perfect due to changing door … Continue reading “Von Duprin Concealed Cable Exit Devices”
LBM and LBSM are not true substitutes for a door position switch.
Interim Hinge Above is pictured an interim hinge, used when your door and your frame have different sized hinge preps. For example, your frame is prepped for a five-inch by four-and-a-half inch hinge and your door is prepped for a four-and-a-half by four-and-a-half inch hinge. Why would you need such a thing? Inability to read … Continue reading “A Few Strange Hinges”
For some applications there is no truly adequate substitute for an overhead stop.
Two main factors are universal in choosing a power supply, but some kinds of electric locking devices require special considerations.
The choice between an electric through-wire hinge and an electric power transfer (EPT) is one of convenience vs. durability. Whereas the hinge requires almost no prep, the EPT does. However, the EPT is designed to minimize stress on the wires and the electrified through-wire hinge is not. Every time the door is opened, the wire … Continue reading “EPT vs. Electric Through-Wire Hinge, Revisited”