 Well hey this is Alex. I'm back with this antique might be a safe deposit or postal lock but I think it's a safe deposit lock based on some research that I did. So I think I found the patent from 1892. This was made probably by Ego Lock Corporation which now is defunct and what was confusing me a little bit is it doesn't incorporate all of the parts of the patent. We'll talk about that in a minute. So it's just like any lock of this type. It has a bolt and bolt has a stump and bolt moves back and forth so that's lock position. That's the unlock position. Very unexciting. Part of the novelty of this lock is it has this additional they call sort of a secondary bolt which in this present configuration can move back and forth and in the patent it actually can move back and forth. And its purpose in the patent would be a little dog, little cam looking thing that would hook into this that would block the bolt. So when the bolt's in the full open position the dog, remove this, the dog would hook onto here and prevent the bolt from going back. When this secondary bolt was retracted by the guard key it would release that dog thereby allowing the bolt to open when the renter key was put in. They appear not to have incorporated this feature although the casting has, let me make sure I can still see, yeah casting has this little nub here and this little V-shaped groove down here. This would be for the spring. I think the dog would rotate on that and this little part of the casting is to prevent manipulation of the dog. So blocks blocks you from sticking a wire or something in there. It's specifically mentioned in the patent so the dog would would block this in the open position and then once the secondary bolt has cleared it it would go away and I presume that this is probably a spring to cause this to retract automatically when the lock is closed because the renter key does not have access to that, does not have a bit at the position that would operate this thing. Okay now in the lock that I got it has one tumbler, lever tumbler that looks like this. So this has this special one special lever. The spring has a little bend in it so that it touches here touches the top here at a point rather than or just at a curve rather than the tip of the spring touching it. It has a little notch here which interacts with this pin here or the secondary stump if you will and it's able to move back and forth due to the elongated hole here. Now if we look and it has this extra hook look at one of the regular tumblers it does not have it has a just a round hole we can get it on there okay it has a pointy ended spring okay no curve in the spring it has no it does not have a notch here and the belly is the normal sort of curved shape it's like a little parabola or part of a circle or whatever you like okay. So here's how this works the the special lever would normally be when I got this was at the top of the pack but I'm I'm just gonna demonstrate it with two levers in and I'm gonna put it put them so that you can see what's going on and I don't have to try to manipulate six levers there's five levers or whatever okay so I've removed the one of the levers this lover the special lover which I'll call it guard lover would normally when I got this lock was on top of it here for demonstration purposes so be easier for me to show you what's going on so you can imagine the guard comes in with his guard key so this is in a bank you say I want to get into box two two one okay guard comes in with his key I'm just gonna use this funny thing as an example he comes in he turns his key okay puts his key in it turns it lifts this lever to the specified height okay through the normal way so come in and then lift this as it rotates to whatever the to the height to clear the stump okay then as it rotates back it's going to engage with this little notch here which would normally not be there okay and when it does this lever pops over you can see there's even a little bevel on the front near the the gate here which ensures that it kind of climbs up onto the stump and doesn't get stuck on the anti-pick features so that gets whoops that gets pulled back onto here this would be somewhere in there okay and then he takes his key out and removes it so he can't open the lock because of the other detainers but he can set this lever and in principle you could have more than one of those in there the renter lever is in its lock position so you come in with your key which lifts this lever up into position assuming you have the correct key and then your key has a a bit on it which will which pushes on the bolt which retracts the bolt and interestingly when the bolt retracts fully it pushes the guard lever back into its sort of unlocked position so you open the box you do whatever you need to do you then lock the lock and both levers drop or the both the guard levers and the renter levers drop into the locked position and so even if you come in with your key again or someone else has a copy of your key but doesn't like the guard doesn't authenticate them they can't get in because of the because the guard lever is blocking their travel so you could construct a key if you had a guard key and you knew the so if you knew the guard bidding so which which of the positions is the guards lever right and you had a renters bidding then obviously you could construct a key that would open the lock with just one key the other thing is the guard key probably would not have a bit to engage the bolt so it doesn't need to it actually doesn't even need to engage this thing because this can't move in the in the other design in the patent all of the levers had a little cut in them they all had just regular round holes but they all had a little cut in them so that the the secondary bolt could slide over to release the dog this doesn't have that again there may or may not have been a spring here I don't think it really needs one because this really can't move it's just sort of there and it may be that they obviously this is this does protect the keep you from sticking in various things in there but in the patent there would be a little dog here a little lever that would hook on to the back of the of the main bolt prevent it from going back so in order to unlock the lock you would have to move that dog out of position and then have the correct bidding to move the whole bolt in the so in the patent the way this would have worked is that you'd have one or more levers like this with this cutout which essentially is a gate for this second stump so it's like there's two locks and one and then the stump when you raise the guard lever levers to the correct positions will do with my finger then it is able to interact with the with the prong here on the secondary bolt and move that guy into position okay now this gate is still wider than one notch on the one unit of depth on the key there so that means that the guard key doesn't have to have bidding for all of the renter keys it doesn't it doesn't reveal the the combination for the renter keys that may give you slightly better idea but then the renter would come in and he'd have you know there'd be a bunch more levers in there he'd come in with his key and his key does not have a bit to engage the secondary bolt it has a bit to engage the primary bolt and when it when he has his or she has their key in place then that bolt is able to move so this lock is novel in the sense that it has at least in the patent it has two separate it's really two locks and one you have the secondary lock which releases this dog which isn't there in this particular instance and then the the standard sort of primary bolt that allows the renter key to actually unlock that actually controls the locking bolt and lets you open the door very cool lock never seen anything like this with these sliding levers it is not mentioned in polford which doesn't necessarily mean anything but probably because it's sort of you know maybe it wasn't very prevalent but it is novel and and you can look it up hicking this lock and i've i've fiddled with it a little bit is and any of these locks with these serration that are heavily serrated with the serrated bolt is really really hard once this once these little teeth get locked up in here it's like two gears together they don't move you can't you can press all you want and you're not gonna move it and so you have to retract the bolt again and you drop levers and i'm i'm sure it's possible to pick it but not easily and in fact the little cover plate has two windows one for the bolt and one for the secondary bolt that would allow a locksmith to either you know having removed this either pick it open or uh combine a key by you know lifting a lever to the right level and then filing the key appropriately and setting up the bidding appropriately for the for a particular lock possibly without disassembling it there you go so um what i'm going to call an eagle uh safe single keyway or single nose um safe deposit lock circa 1890s anyway thank you for watching um i'll put out some picking videos later today hopefully uh to make up for all the uh lock porn slash lock geeky stuff uh been doing the last few days and uh yeah so as always have fun and please keep it legal so we can all continue to have fun cheers