US1390775A - Nut-lock - Google Patents

Description

C. FRITZ.

NUT LOCK. APPLICATION FILED APR. 15, 1920.

1,390,775. Patentedsept- 13,1921.

PATENT OFFICE.

CHARLES FRITZ, 0F BALTIMORE, MARYLAND.

NUT-LOCK.

Specification of Letters Patent.

Patented Sept. 13, 1921.

Application filed April 15, 1920. Serial No. 374,136.

To all whom it may concern:

Be it known that CHARLES FRITZ, a citizen of the United States, residing at Baltimore, in the State of Maryland, has invented certain new and useful Improvements in Nut-Locks, of which the following is a specification.

This invention relates to improvements in nut-locks and has reference to an improved device of this character whereby the nut may be wired and held against rotation on the bolt.

The invention is illustrated in the accompanying drawing, wherein- Figure 1 shows the complete device in perspective as it appears when in use.

Fig. 2 illustrates the device in longitudinal section.

Fig. 3 shows the same in top or plan view, and

Fig. 4 illustrates in perspective the detached washer plate.

Referring to the drawing the numeral 5,

. designates the bolt having a circumferentially screw-threaded body 6, with a head 7, at one end thereof, and at diametricallyopposite sides said bolt-body being provided with a longitudinally-extending groove 8 and 9 respectively.

A passage or bore 10, is provided through the bolt-body from one groove 8 to the opposite groove 9 thereof, said passage being located somewhat near the head 7, as clearly shown in Fig. 2, of the drawing, all for a purpose presently to be explained.

The nut 11, employed is of the ordinary well-known form.

In connection with the special bolt and the ordinary nut, I employ a washer-plate 12, having a central opening 13, for the passage of the bolt and provided at its marginal edge with a series of perforations 14. In the present instance the marginal edge of the washer-plate has an up turned annular flange 15, with lugs 16, arranged at intervals around the periphery of the same and the perforations 14, are formed in these lugs.

I further employ a tie or looking wire 17, which latter is carried by the bolt, and as shown best in Fig. 2, of the drawing, this wire is first passed through the passage or' bore 10 of the bolt producing a cross-stretch l7, and the two ends 18 and 19 are bent back and laid respectively in the longitudinal receive the wire ends so that a nut may be screwed onto the bolt without contact with said ends. The normal position of these prvire ends is illustrated by broken lines in In operation, presuming that the plates 20 and 21 are to be bolted together, the bolt 5, with the wire extending through the bore 10, and the ends 18, 19 bent back into the grooves 8 and 9 of the bolt, will be passed through the plates. The washerplate 12, will then be placed over the threaded end of the bolt and the free ends of the concealed wire-ends until said plate seats on the upper side of plate 20.

The nut 11, will then be screwed down on the nut without engaging or disturbing the wire-ends in the bolt grooves, until the nut is seated firmly in place against the washerplate.

Having now securely fastened the bolt in place by screwing the nut home, the wire ends 18-19 will be drawn down from the bolt grooves and their free ends passed through the nearest perforations let, in the washer-plate. These wire ends are then drawn tightly down over the nut so as to firmly engage the latter and the free ends are bent at the outer sides of the lugs 16, so as to hold them in the taut condition over the nut. By thus drawing the wire taut over the faces of the nut, the latter will be held against accidental rotation and therefore locked with respect to the bolt.

Having described my invention, I claim, The combination with a threaded bolt having longitudinal grooves at diametrically opposite sides and provided with a cross passage through the bolt body from 9 CHARLES FRITZ.

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