US88974A - John mcleod - Google Patents

Description

. dimmi JOI-IN AMCLEOD, OF SAN FRANCISCO, CALIFORNIA.

Letters Patent No. 88,974, dated April 13, 18.69.

IMPROVEMENT IN COMBINED KNOB-LATCH AND LOCK The Schedule referred to in these Letters Patent and making part ofthe same.

To all lwhom 'it may conce/rn Be it known that I, JOHN MCLEOD, of the city and county of San Francisco, State of California, have invented an Improved Door-Lock; and I do hereby declare the following description and accompanying drawings are sncient to enable any person skilled in the art or science to lwhich it most nearly appertains, to make and use my said invention or improvement, without further invention or' experiment.

My invention relates to an improved lock for doors, more especially to that class known as spiing-locks, or night-latches and It consists in so constructing the tumbler, that when moved by the key in one direction, it so acts on a secondary-bar, as to securely stop the bolt, and when moved in the opposite direction,i,t releases the bolt, so that it can be operated by the knob, and will serve as an ordinary latch.

'To more fully explain my invention, reference is had to the accompanying drawings, and letters of reference marked thereon, of which- Figure l is a view of my lock, with one plate removed, and having the bolt drawn.

Figure 2 is a view, with the bolt locked.

Similar letters of reference in each of the figures indicate like parts.

A is the case, within which the different parts of the lock are placed, and which is fastened to the door.

The bolt B has a lug, O, on each side, so that it may be turned over, and the lock applied to any door, whether it swings to the right or left.

At the back end of the bolt are two arms D D, one above and one below, and both extending back vin a line with the bolt, leaving an open space between them.

A small lug, E, projects from the end of each of these arms, and the two are operated by the pin F, which extends through the spindle G of the knob, and moves the bolt by means of either one lug or the other, as the knob may be turned to the right or left.

The bolt has an oblong slot, H,l cut through the middle, and within which the spring I is placed.

This spring presses at one end against the stationary post J, which projects up through the slot, and thus tends to keep the bolt forward.

Below the bolt is a short bar, K, which is pivoted at L, and may be turned so as to prevent the withdrawal of the bolt, by intercepting the lug O ;v or it may be allowed to fall out of the line of motion when the knob can be turned at pleasure, and the bolt'withdrawn.

The 'tumbler consists of thevbar M, which in this case has a slot, a, by which it is guided in its movements on the pin C.

Another pin, d, arises from the side of the case, and over this pin, the end N of the tumbler M moves, and is, by its shape, raised and lowered in these movements, so as to raise or lower the bar K, and stop or release the bolt.

The key O operates in a slot, or depression P, or other suitable device in the tumbler, so as to move it, and the tumbler, being raised by .the pind, elevates the bar K, and thus locks the bolt.

Having thus described my invention,

What I claim as new, and desire to secure by Letters Patent, is

The bar K and tumbler M, when arranged in relation to each other and to the key O, and the lug C, on the bolt B, substantially as herein set forth.

In witness whereof, I have hereunto set'. my hand and seal.

JOHN MCLEOD. [n s.] Witnesses:

JN0. L. BOONE, D. W. MGLEOD.

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