US93006A - Improved bolt - Google Patents

Description

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Lam Patent No. 93,006, vamai .my 27, 1869.

IMPROVED BOLT.

The Schedule referred to in these Letters Patent and making part of the same.

To all lwhom. it may vconcern Be it known that I, E. L. ROBERTS, of Brooklyn, in the county of Kings, and State of New York, have invented a new and useful Improvement in Bolts for Folding Doors; and I do hereby declare that the follow'- ing is a full, clear, and exact description thereof, which will enable others skilledrin the a'rt to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

This invention relates to improvements in sliding bolts for folding doors, such as patented to me, March 15, 1859, No. 23,262, the object of which is to provide for sliding the 'upper fastening-bolt, and the laterallymoving guard-bolt, .whether the lower slide-bolt coincide with its mortise, so as to fall into it or not, as it frequent-ly happens that it does not ou closing the door, owing to warping or springing, which, in the arrangement described in the aforesaid patent, prevents the movement of any of the bolts until the said lower bolt is adjusted to coincide and pass into its notch.

Figure '1 represents a sectional elev. tion of my improved fastening, 'as applied to one of a pair of folding doors; and

Figure 2 represents a modified arrangement of the same.

Simihr letters of reference indicate corresponding parts.

The object of the invention described in the aforesaid patent, is to prevent closing both the doors properly until the fastening-bolts (top and bottom) of one door have been forcedhome in the notches provided for them; and to accomplish this, a bolt, A, is so combined with the spindle B, by which the top and bottom vboltsv are operated, as to be thrown ont of the edge of the d`oor C, when the bolts D E are withdrawn, so as to prevent the closing of the door'F until the said bolts D E are forced home, which withdraws the bolt A.

In carrying o ut this invention practically,-I have found that when the doors warp and spring, as Ithey generally do in ashort timeafter being hung, the bot` tom bolts will not .coincide with the notches provided for them, when the top of the door is arrested by the stops usually provided for them at the top, requiring care to be taken to properly adjust the bottom before the bolts can be shot.

I therefore propose i the latter will not obstruct the movement of the spindle. necessary for shooting the bolt E, and'withdrawing bolt E to to so connect the rod D" that the boa A, leaving the boit D to fau into as nach, 0r to be forced therein by a spring, when, bythe vibration imparted to the bottom of the door G, by the jarring of freely in the slot, to permit the rod to work in and ont ,v

of the axial hole to some extent.

A spiral spring, H, isarranged on the rod D', and bearing against the top of the-bolt, soasto Vhavea constant tendency to press the bolt down. In this arrangement, if the bolt D fails to enter its notch, the rod D will, on 11e turning of the spindle,

be forced down into the axial hole compressing the spring, the pin G sliding in the slot 'of the bolt D, thereby permitting the bolts E and A to be shot, and when the said bolt D coincides with its notch, the spring will force it down.

In tig. 2, I have represented the Vslide I, to which the operating-crank L is connected, yand to which the rod D is represented as rigidly connected in' fig. 1, as having a recess, K, and the bolt D as connected to theslide, below the recess, so as to move in the said slide to some extent, and having a spiral spring, M, pressing against the underside of the sliding block M, to force the rod D', and the bolt D, which, in this case, will be rigidly connected to it, down.

This arrangement will have the same Vpractical operation as the other, and vother similar arrangements maybe employed.

Having thus described my invention,

I claim as new, and desire to secure Patent- The combination, with the door G, of the bolts E, A, and D, when the bolt A is arranged to be thrown outgwhen the said bolts E A are withdrawn, and cica fum-sa, and when the bolt D is arranged to permit the be shot and the bolt A to be withdrawn, whether the said bolt D falls into its notch or not, substantially as specified.

The above specification of Lmy invention signed by me, this27th dayof May, 1869.

' E. L. RQBERTS.

by Letters Witnesses:

' FRANKBLOOKLEY,

An'nx. F. ROBERTS.

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