| 摘要 |
638,190. Locking anchor nuts ; stud-and-socket fastenings. TINNERMAN PRODUCTS, Inc. April 12, 1948, No. 10100. Convention date, Jan. 16.. [Classes 44 and 89 (i)] [Also in Groups XXII and XXXV] A fastener 10 for securing instruments, such as condensers, tuning elements 5, and the like, to a panel P comprises a sheet-metal base 11 having attaching means extending therefrom and a pair of tongues 20 severed from the base and providing therein arcuate thread elements 22 for engaging the threads of a threaded member 7. the tongues being bent to face each other and curved transversely in arcuate form to engage the crests of the threads on the member 7. The fastener may be stamped from a sheet of spring steel or cold rolled steel to form a protuberance on the base 11. The protuberance is slit to form a strip which is then severed transversely to form the tongues 20. A burr formed on one of the tongues 20 during the operation of separating the tongues is removed by flattening or peening before the tongues are bent upwardly. Rounded corners are formed on the arcuate elements 22 which are formed into a helix pattern to engage the member 7. One or both arms 13 projecting from the base 11 are provided with a slit forming a shoulder 18, and both arms have a perforation 16 formed therein to facilitate the bending of flanges 15. The slit parts of the arms 13 are bent to form prongs 19 beneath the shoulders 18, and the arms are bent into arcuate form to correspond with the form of the tuning unit. The arms 13 are then bent normal to the base 11 and the flanges 15 are formed on the arms. The tuning unit 5 is forced into the fastener over the prongs 19, while the screw 7 of the core element is threaded through the elements 22 and between the tongues 20. The unit is mounted on the panel P by forcing the fastener through a hole 1 in the panel until the shoulders 18 spring outwardly beneath the panel to lock the unit in position. The flanges 15 may be bent downwardly, as viewed in Fig. 1, to provide a resilient gripping action for a variety of panel thicknesses.
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