US2949654A

US2949654A - Hoist cable retainer

Info

Publication number: US2949654A
Application number: US633108A
Authority: US
Inventors: Frederick O Luenberger
Original assignee: Us Electrical Motors Inc
Current assignee: US Electrical Motors Inc
Priority date: 1957-01-08
Filing date: 1957-01-08
Publication date: 1960-08-23
Anticipated expiration: 1977-08-23

Description

Aug. 23, 1960 F. o. LUENBERGER HOIST CABLE RETAINER 2 Sheets-Sheet 1 Filed Jan. 8, 1957 fww 41m) Aug. 23, 1960 F. o. LUENBERGER HOIST CABLE RETAINER 2 Sheets-Sheet 2 Filed Jan. 8, 1957 flame/6K 0. lam/amaze www HOIST CABLE RETAINER Frederick 0. Luenberger, Los Angeles, Calitl, assignor to US. Electrical Motors, Inc., Los Angeles, C'alifi, a corporation of California Filed Jan. 8, 1957, Ser. No. 633,108 1 Claim. (Cl. 24-238) This invention rel-ates to hoisting equipment, and more particularly to a device for ensuring that the flexible rope or cable is prevented from slipping off from the lifting lug when a slack occurs.

It is one of the objects of this invention to provide a simple and elfective device for accomplishing this purpose, and that can be readily installed.

This invention possesses many other advantages, and has other objects which may be made more clearly apparent from a consideration of several embodiments of the invention. For this purpose, there are shown a few forms in the drawings accompanying and forming part of the present specification. These forms will now be described in detail, illustrating the general principles of the invention; but it is to be understood that this detailed description is not to be taken in a limiting sense, since the scope of the invention is best defined by the appended claim.

Referring to the drawings:

Figure 1 is an elevation showing the use of the invention in connection with a vertical electric motor;

Fig. 2 is an enlarged fragmentary side elevation thereof;

Fig. 3 is an enlarged sectional view of the form of the invention shown in Fig. 2; and

Fig. 4 is a detail view, illustrating another form of one of the elements used in the invention.

Heavy apparatus such as a vertical electric motor 1 is often provided with means for applying hoisting slings. In this instance, a cover 6 for the motor has integral lugs 2 for the accommodation of hoisting cables or ropes 3. Such lugs are diametrically oppositely arranged on the cover 6, and have downwardly directed hook extensions 14 extending in spaced relationship to the cover to form downwardly opening spaces for the corresponding slings 3.

In the event a rope sling should become loose, as by relieving the load thereon, the sling 3 may accidentally slip out from underneath the extension of the lugs 2. In order to prevent this accidental occurrence, a retainer pin 4 is provided for each lug 2, and urged to the retaining position of Fig. 3 by gravity. The pin extends below lug 2 substantially to close the opening of the space formed by extension 14. Thus the pin obstructs the downward movement of the sling 3 below the lug 2.

States Patent The pin is slidably accommodated in a bore 5 slanting downwardly and formed in the top cover member 6 of the motor 1. In order to provide a relatively long guide, a corner of the member 6 is filled in as indicated at 7 (Fig. 3).

In order to limit axial movement of the retainer pin 4, spring rings 8 and 9 are accommodated in grooves near the end of the retainer pin 4. The spring rings 8 and 9 cooperate respectively with the

flat surfaces

10 and 11 located internally and externally of the member 6.

When it is desired to remove the sling 3 from the lugs 2 after the apparatus 1 has been deposited in the desired place, the pin 4 may be pushed inwardly out of the way of the cable or rope sling 3. The phantom line position of Fig. 3 shows this inward position.

Instead of using the spring rings 8 and 9 as a limiting element, a taper pin 12 (Fig. 4) may be used. In other respects, the retainer pin 13 has the same configuration as the retainer pin 4.

The inventor claims:

In combination: a casing member having an exterior wall, said member carrying a lifting lug; said lug extending in spaced relationship from and along the exterior surface of said wall to form therewith a downwardly opening space for a flexible lifting element; a retainer pin slidably supported by and passing through the wall, said wall being thickened to provide an extended guide for said pin, said pin being supported entirely by said guide, said pin sloping downwardly in a direction exteriorly of the wall, whereby gravity determines a stable position of said pin in which said pin projects substantially across the opening of said space; and means determining opposed limits to the sliding movement of the pin, said pin at one limited position preventing access to said space and at said opposite limited position permitting access to said space, whereby at said one position the flexible element is retained in said space, and at said opposite limited position said flexible element may be removed from or placed into said space, said pin throughout its limits of movement being maintained in sliding engagement with said wall and against separating movement with respect thereto.

References Cited in the file of this patent UNITED STATES PATENTS 1 112,635 Robinson Mar. 14, 1871 330,991 Mathews Nov. 24, 1885 1,728,930 Grant Sept. 24, 1929 1,729,940 Hinderliter Oct. 1, 1929 1,798,403 Djidich Mar. 31, 1931 2,333,925 Grossett Nov. 9, 1943 2,704,681 Fischer Mar. 22, 1955 2,764,048 Thompson Sept. 25, 1956 FOREIGN PATENTS 100,257 Germany Dec. 15, 1898 246,714 Great Britain Feb. 26, 1926