Ingersoll SC74 Mortise Claw-Bolt deadlock

[Squelchtone]

I'm happy to announce a great score on ebay. This was listed for $9.99 US plus shipping. New old stock.

Ingersoll SC74 10 lever claw-bolt deadlock double cylinder new in box.

http://nynex.s5.com/TOOOL-US-Boston/loc ... ortise.jpg


I see they're still listed on UK lockie websites anywhere from 117 to 153 British Pounds.

I shall give it a good home in my collection.

Squelchtone

[MBI]

You sir, have made me envious.

[toomush2drink]

Still a brilliant lock even though the design is quite old now.The best touch is the ceramic plate behind the front of the lock to thwart drilling as it disapates the heat.Can be picked but a real challenge.

[Scott_93]

Propper British enginered lock that, it will serve you well.

Scott.

[raimundo]

You gonna put that on the front door squelchy?

[workstation]

It's nice, but you'd have thought they could find a way to cover up the screws on the interior cylinder.

I mean, surely with that design a screwdriver is also a key?

Ugly also.

[zeke79]

I have always been fond of the design astheticly and love the mechanical design of the cylinder. As far as the interior screws, there are several ways to fix the problem so that if someone breaks in through a window they cannot remove the lock and use the door to cart out your belongings. A pan head cap screw with allen head can have tight fitting ball bearings drove into them. Once driven in they are nearly impossible to remove. This to me would be hardly noticeable and would fix the problem. Abloy protec double cylinder deadbolts are this way though the socket head cap screws and ball bearings are hidden by a cover plate.

Another thing one could do is simply use the proper locktite compound on the screws before installing them. The proper locktite would be the permanent compound used for things like interference fit alignment dowels on manufacturing dies etc. This way all you would accomplish with a screw driver is stripping the heads out of the screws securing the lock.

As said, there are many ways to secure the lock more effectively from the insides. In fact using the two methods above together would just about ensure the fastening screws could never be removed and the ball bearings in the head heads would prevent drilling the fasteners out for the most part.

[mhole]

The screws cannot be removed without the key - there is a notch in the core (at the 3 Oclock position) which allows the screw to go in, and you have to turn the core to the correct position to put in each screw. The screws have an angle head, and a curved cutaway which matches the radius of the core, so the core can only turn with the screw in one position.

They thought of that angle, and it's covered

[workstation]

Aaaah.

Yes, I see from the photo.

Nice.

[workstation]

But, on second thoughts, still ugly.

[NKT]

Actually I'm fairly sure this version pre-dates the ceramic disc. And it is far from ugly.

The hook has a two position hook so it is deadlocked even if the door is mis-aligned, and it can't be pushed back.

A very secure lock.

[Rickthepick]

Bargain!

Wouldnt mind that on my own door

[Squelchtone]

The screws cannot be removed without the key - there is a notch in the core (at the 3 Oclock position) which allows the screw to go in, and you have to turn the core to the correct position to put in each screw. The screws have an angle head, and a curved cutaway which matches the radius of the core, so the core can only turn with the screw in one position.

They thought of that angle, and it's covered

I'm actually selling that lock right now, and took some photos of it. Thought I'd update this thread with a pic of the feature you wrote about.




I wasn't even aware of this until you explained it, thanks!
Squelchtone