US2195997A

US2195997A - Swivel device

Info

Publication number: US2195997A
Application number: US276996A
Authority: US
Inventors: Perkins Frederick
Original assignee: PERKINS MARINE LAMP and HARDWARE CORP
Current assignee: PERKINS MARINE LAMP and HARDWARE CORP
Priority date: 1939-06-02
Filing date: 1939-06-02
Publication date: 1940-04-02
Anticipated expiration: 1957-04-02

Description

April 2, 1940. F. PERKINS SWIVEL DEVICE Filed June 2, 1939 ORNEY v Patented Apr. 2, 1940 UNITED STATES rarest OFFICE SWIVEL DEVICE Application June 2, 1939, Serial No. 276,996

8 Claims.

This invention relates generally to swivel devices. More particularly, my invention relates to an improved construction for swivel devices and to an improved method of assembling the parts thereof.

One of the objects of my invention is to provide a swivel device construction of the character described which shall comprise relatively few and simple parts, which shall be quick and easy to assemble, which shall be relatively inexpensive to manufacture and which, at the same time, shall be highly efiicient in use.

Another object of my invention is to provide in a swivel device construction comprising a plu- 15 rality of parts and a novel method of assembling the said parts.

Other objects of my invention will in part be obvious and in part hereinafter pointed out.

The invention accordingly consists inthe fea- 2 In the accompanying drawing, in which is shown one of the various possible embodiments of this invention,

Fig. 1 is an edge elevational view of a swivel device constructed and assembled in accordance 30 with my invention; i

Fig. 2 is an enlarged sectional view taken substantially'on the line 2-2 of Fig. 1;

Fig. 3 is a disassociated View, partly in section, illustrating the manner of assembling the parts 35 of the device shown in Fig. l; and

Figs. 4 and 5 are perspective views of certain of the parts shown in Fig. 3.

Referring now in detail to the drawing, I have disclosed a suitable swivel device H), such as for I 40 example, of the pulley type and comprising the relatively rotatable parts ll and I2.

Heretofore swivel devices of the character described having relatively independently rotatable parts have been so designed that they were gen- 5 erally assembled during the molding or casting operation. This method of manufacture was attended with many disadvantages such as, for example, the inability to provide smooth fitting parts which were at the same time independently ro- 50 tatable, due to the very nature of the casting process. Also, the previous casting method of manufacture was relatively expensive and limited assembling the same in which the above described disadvantages have been overcome. While in the drawing I have shown my invention as applied to the type of swivel device employing a pulley, it is understood that my invention may be satisfactorily practiced in connection with any other type of swivel device.

In the drawing I have shown the part l2 designed to carry the pulley l3-as comprising a pair of parallel spaced walls l5 and It provided with aligned apertures into which there is fixed a transverse shaft l I carrying a rotatably mounted pulley it. The walls l5 and I6 are interconnected at the bottom thereof by an integral wall it and at thetop by an integral wall I9. 5 The top wall i9 is provided with a through opening 28 which is tapered as shown in Fig. 3. The part i I is designed to serve as an attachment member and is provided withan eye opening 2! and an integral cylindrical depending shank 22. The said part i i is preferably flared outwardly at the bottom thereof as shown in Fig. 3 to provide a shoulder portion 23 wider than the shank 22.

It is noted thatthe shank 22 is tapered outwardly from the shoulder 23, such taper having the 25 same degree of angularity and in the same direction as the taper of the opening 20 in the part !2. The shank 22 and the opening 20 are so designed relatively to each other that the smallest diameter ct-b of the opening 20 will be slightly larger than the largest diameter cd of the shank 22. Itis thus seen from the above described construction that the shank 22 of the part H may be readily inserted into the opening 20 and that the distance of such insertion is limited by the shoulder 23.

For quickly and permanently assembling the parts i i and i2 there is provided a hollow plug member Zishown in Figs. 3 and 5. The said member 24 comprises a solid base portion 25 40 and a cylindrical wall 26 upstanding therefrom to define an opening 2'! in said wall 26. The outside diameter of the wall it is slightly smaller than the largest diameter ef of the opening it so that the free edge 26!]. of the cylindrical Wall 26 may fit into the opening it) for a slight distance. In assembling the device, the shank 22 is first inserted in the opening Zli so that the shoulder it rests at the top edge of the wall IS. The shank 22 is centered within the opening 20 to provide an annular space between the outer surface of the shank 22 and the inner surface of the wall 26. The member 24 is then forced into the said annular space surrounding the shank 22, from the enlarged end e--j toward the constricted end ab. Due to the taper of the wall of the opening 20, the cylindrical wall 26 will be forced into a tapered shape to conform to the tapers of the shank 22 and the opening and will appear as shown in Fig. 2 of the drawing. In this manner the part ll will be held captively engaged with respect to the part 12 and the said parts II and i2 will at the same time be free to rotate relatively to and independently of each other. The diameter of the wall 25 of the member 24 is so designed with respect to the sizes of the opening 29 and shank 22 as to provide a slight clearance when bent into position as shown in Fig. 2 so as to permit free rotational movement of the shank 22 captively held in position by the member 2 The amount or distance to which the cylindrical wall 26 is inserted within the opening 26 is limited by the shoulder portion 25a of the base 25.

From the above described construction it is thus seen that the parts H and 52 which go to make up the swivel device have been assembled in a simple manner and with great speed and at the same time the said parts may be made of such material which can be automatically machined and thus produced relatively inexpensively.

It will thus be seen that there is provided a device in which the several objects of this invention are achi ved, and which is well adapted to meet the conditions of practical use.

As various possible embodiments might be made of the above invention, and various changes might be made in the embodiments above set forth, it is to be understood that all matter herein set forth or shown in the accompanying drawing is to be interpreted as illustrative and not in a limiting sense.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. A device of the character described comprising a pair of independently relatively rotatable parts, one of said parts having a tapered opening, the other of parts having a shank portion thereof received in said opening, and means comprising a sleeve men: 181' having a continuous wall for captively holding said parts in assembled relationship, said sleeve member and said shank portion being in opposed relationship.

2. A device of the character described comprising a pair of independently relatively rotatable parts, one of said parts having a tapered opening, the other of said parts having a shank portion thereof received in said opening, and means for captively holding said parts in assembled relationship, said last named means comprising a sleeve member having a continuous wall portion thereof frictiona 1:; received in said tapered opening and freely surrounding the said portion of said part in opening, said sleeve member and said shank portion being in opposed relationship.

3. A. device of the character described comprising a first part having a tapered opening, a second part having a portion thereof tapering outwardly towards its free end and freely received within said opening, and means for permanently holding said parts in assembled relationship, said last named means comprising a member having a hollow portion tapering inwardly towards its free end, said second part tapered portion being freely received within said hollow tapered member portion and the said hollow tapered portion being frictionally received within said first part tapered opening.

4. A swivel device of the character described comprising a first part having a tapered opening, a second part having a portion thereof tapering outwardly towards its free end and freely received in said opening, and a member having a hollow portion tapering inwardly toward its free end and frictionally received in said first part tapered opening and freely surrounding said second part portion, said second part and said member extending on opposite sides of said first part, whereby to hold said first and second parts permanently assembled and at the same time to permit of independent relative rotation of said parts.

5. A swivel device of the character described comprising a first part having a tapered opening therethrough tapering in one direction, a second part having a portion thereof tapering utwardly towards its free end and freely received within said opening, and means for permanently holding said parts in assembled relationship, said last named means comprising a member having a hollow portion tapering inwardly towards its free end, said first part tapered portion being freely received within said hollow tapered member portion and the said hollow tapered portion being frictionally received within said first part tapered opening, the angularity of the tapers of said first part opening, said second part tapered portion and said member hollow portion being substantially the same.

6. In a swivel device having independently relatively rotatable parts, a through tapered opening in one of said parts, a member frictionally held in said opening, a tapered shank in the other of said pair of parts, said tapered shank being received in an opening in said member and freely rotatably held therein, said member and said tapered shank part being disposed on opposides of said opening.

7. In a method of assembling the parts of a swivel device wherein one of said parts is provided with a shank and the other of said parts is provided with a corresponding opening to freely receive said shank therein, that improvement which consists of the step of forcing a member between the outer surface of said shank and the wall of said opening to thereby deform said member by decreasing a portion of its diameter to captively hold the said shank freely rotatable in said opening.

8. In a method of assembling the parts of a swivel device wherein one of said parts is provided with a tapered shank and the other of said parts is provided with a correspondingly tapered opening, that improvement which consists of the steps of inserting said shank into said opening through the smaller end of said opening and forcing a member between the said shank and the wall of said opening through the larger end of said opening in a direction toward the smaller end of said opening to thereby deform said third member to captively hold the said shank freely rotatable in said opening.

FREDERICK PERKINS.