View allAll Photos Tagged latching
DSC_7277_edited-1. I needed a little more light on this than ambient. I ended up using too much. I put the flash on the floor and fired it upward. Then I inverted the image to make it look like the light was from above.
French latches which were in vogue until a generation ago. The keyhole of the French latch is of this shape — . The key is inserted in the bottom slit and is then raised, the short stem sliding up the vertical slit. In doing this, the bitt has to pass a horizontal plate-ward, as also a narrow vertical plate to the foot of which the ward is riveted. This vertical plate is just within the vertical slit, and it serves as a screen to prevent access to the lock above the ward. The key, having passed the ward, comes into contact with a descending arm from the latch, and so raises the latter. The bronze plate of a hasped lock in the Guildhall, Fig. 68, B, would require a key of this form. There is no doubt that the movement of the Roman keys of the type was identical with that of the French latch-keys, but it is doubtful whether they lifted latches. It is more likely that their locks had bolts, and that in lifting the key the bolt was freed from tumblers of some special form. The key, however, would not be competent to draw or shoot the bolt, and the horizontal hole above the keyhole in the lock-plate just referred to indicates how this may have been accomplished. If the bolt had a small knob protruding through it, it could then be moved with the one hand while the key was raised with the other. The keys are rather rare, and the two shown are Guildhall examples.
French latch. A small, hut broad, flat key, having numerous wards cut out of a solid plate of metal, is passed through a narrow horizontal perforation in the door (covered with a suitable escutcheon), whence it enters the body of the latch; the key being then merely lifted upwards, the solid wards of the latch pass through the interstices of the key, permitting the latter thus to unlatch the door.
Odell's latch keys were more commonly known as French latch lifters. The spade like end or bit of the key was pierced with many intricate shapes, symbols and initials with acted on similarly shaped fixed wards within the lock in a vertical sliding action. Invented about 1792 and were still made at the end of the Victorian period. Sizes range from 45mm to 65mm.
There is another kind of latch which affords all the security of a lock, with numerous wards, termed the French latch. A small, hut broad, flat key, having numerous wards cut out of a solid plate of metal, is passed through a narrow horizontal perforation in the door (covered with a suitable escutcheon), whence it enters the body of the latch; the key being then merely lifted upwards, the solid wards of the latch pass through the interstices of the key, permitting the latter thus to unlatch the door.
Picture of a door latch outside view.
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