US1800698A - Electric swivel connection - Google Patents

Description

' 14, 1931. NIELSEN 1,800,698

ELECTRIC SWIVEL CONNECTION Filed Nov. 5. 1928 l NVENTOR AJZ Nielsen BY Z/k4,.

ATTORNEY Patented Apr. 14, 1 931 ABILD ANNENEU'S MARNDOBJET NIELSEN, OF BROOKLYN, NEW YORK ELEOTBIOSWIVEL CONNECTION Application filed November 5, 1928. Serial No. 317,136.

This invention relates to new and useful improvements in electrical devices, especially electrical connections, and has more particular reference to a novel electric safety swivel a connector.

The invention has for an object the provision of a device of the class mentioned which is of simple durable construction, desirable in use and efficient in action, and

l which can be manufactured and sold at a reasonable cost.

The invention proposes the use of an insulation body provided with an inner shield circular pro ecting wall concentric with and engageable within an outer shield circular grojecting wall from a second insulation ody. A circular contact support wall projects from the second insulation bod and an inner ring contact engages on the inside of this wall while an outer ring contact an ages on the outside of the wall. An inner ger contact is attached on the insulation body and engageable a ainst the inner ring contact, and an outer finger contact is attached on the insulation body and engageable with the out er ring contact. The ring contacts are of such height so as to be disposed beneath the surface of the outer shield projecting wall, and the contact fingers are of such heights as 60 be disposed within the inner shield wa A novel feature of this construction is that the insulation bodies ma be separated and no contacts will project cm the boundaries thereto. This presents a safety feature in that the contacts cannot readily be short circuited. It is particularly pointed out that the shield walls are depended upon for shielding the contacts from accidental touchlhis swivel connector may be used in tool handles for connecting electric wires therewith or may be used intermediate of its ends of electric leads. Of course, this is not a limit-ation since there are many other uses for the device. In all these uses the insulation bodies may be accidentally separated by a ull on the wires and as the insulation bodies all, they may come in contact with metal surfaces, but due to the shielding walls there is no danger of short circuiting. Obviously, if the contacts of the device should pro- 'ect from the boundaries of the insulation odies, short circuiting would occur.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawing, and to the appended claims in which the various novel features of the invention are more par- 60 ticularly set forth.

In the accom anying drawing forming a material part 0 this disclosure:

Fig. 1 is a side elevational view of a connector constructed according to this invention.

Fig. 2 is a fragmentary side elevation view of a tool handle provided with a connector constructed according to this invention.

Fig. 3 is a side elevation view of a connector with the insulation bodies separated.

Fig. 4 is ,a vertical sectional view of the device with the insulation bodies engaged.

Fig. 5 is an elevational view looking in the direction of the arrows 55 of Fig. 3.

Fig. 6 is an elevational view looking in the direction of the arrows 66 of Fig. 3.

Fig. 7 is a perspective view of the inner ring contact with a port-ion thereof broken away.

Fig. 8 is a perspective view of the outer ring contact with a portion thereof broken away.

Fig. 9 is a perspective view of one of the finger contacts of the device, and

Fig. 10 is a perspective view of a flat electrical connection constructed with the swivel connector at one end.

Fig. 11 is a side elevational view of an electric light socket with the swivel connector applied.

The reference numeral 10 indicates generally an insulation body provided with an inner shield circular projecting wall 11 concentric with an outer shield circular proj ecting wall 12 from a second insulation body 13. These bodies are arranged for engaging each other so that they may swivel, and so that they may be separated. This feature is accomplished by inter-engaging portions allowing rotation, and a drawing apart. Sufiicient play shouldbe allowed between the engaging parts to permit the desired actions withoutexcessive efiorts.

The second insulation body 13 is provided with a circular contact support wall 16 pro "jecting' from the inner side thereof and with ring contact has an inward turned top edge 20 and a connector lug 21 at its bottom edge. An outer ring contact 22 is positioned on the outer side of the circular wall 16 and is held by inwardly pressed portions 23 engaging the material of the wall. This outer ring contact is formed with an outward bent edge I 24 and a connection lug 25 at its bottom end.

The second insulation body 13 is provided with apertures 26 through which electrical leads 27 pass. These leads form electrical connections with the lugs 21 and 25. Screws 27 enga e in these lugs and provide a means for attac ing the leads to these lugs. These leads extend from the insulation body and connect either with a source of current or with some electrical device.

An inner contact finger 28 is attached onto the insulation body 10 within a recess 29 formed in the recess 30 within the boundaries of the inner shield wall 11. This inner contact finger connects with the inner ring con-' tact 18. An outer contact finger 31 is secured on the insulation body 10 within a recess 32 in communication with recess 30, and conof the body.

The insulation body 10 is formed with apertures 34 and leads 35 pass through these apertures and connect with the contact fingers. The contact fingers are provided with screws 36 for serving as clamps for attaching the leads '35.

These .contact fingers are formed as shown at 37 and adapted for engaging the bent edges 20, 24: of the contactrings. It is pointed out that this arrangement aids in holding the insulation bodies together and at the same time does not prevent turning of the bodies relative to each other. The wires 35 may connect with a source of electrical current or may connect with some electric device.

In Fig. 2 the insulation body 10' comprises a portion of a tool handle. This kind of tool is not shown, but may be an iron or any other device. In Fig. 10 a socket 10 has been illustrated integral with an insulation body 10. In other respects this arrangement them apart and the shield walls protect the contacts from accidental short circuiting. It is pointed out that should the insulation body 10 rest upon a metal surface the contact. fingers will not be short circuited. This is also true of the second insulation body 13, that is, should it rest upon a metal surface the contact rings will not be short circuited.

The path of the current may readily be traced, starting at one of the leads '35, the circuit continues to one of the contact fingers, e. g. say the outer contact .finger then through the outer ring contact and along the lead 27. The other lead 35 connects with the inner contact finger, the inner ring contact and finally the second of the leads 27.

In Fig. 11 a lamp 40 is illustrated engaged in a socket 41 having a plug connection 42 at its rear end. Integral with the rear end of the plug connection 42 is an insulation body 10, and a second insulation body 13 is in swivel connection with the latter body as previously described.

While I have illustrated and described my invention with some degree of particularity, I realize that in practice various alterations therein may be made. the right and privilege of changing the form of the details of construction or otherwise I therefore reserve altering the arrangement of the correlated 7 parts without departing from the spirit of the scope of the appended claims.

Having thus described my invention what I clalm as new, and desire to secure by Letters Patent of the United States, is:

1. An electric swivel connector, comprising an insulation body with an inner shield proj ecting wallforming a recess within its boundaries, a'second insulation body with an outer shield projecting wall 'engageable against the inner shield wall and forming a recess within its boundaries, a circular contact support wall within the recess of the second body member, an inner ring contact fixed within the support wall, an outer ring contact fixed on the outside of the support wall, an inner contact finger attached in the recess of the first body and engaging the inner ring contact when the bodies are engaged with each other, and an outer contact fin er mounted similarly to the inner contact finger for engaging the outer ring contact, the ring contacts and the finger contacts being formed with bent up edges, for the purpose of aiding in holdingthe bodies in swiveled connections.

2. An electric swivel connector, comprising an insulation body with an inner shield projecting wall forming a recess within its boundaries, a second insulation body with an outer shield projecting wall engageable against the inner shield wall and forming a recess within its boundaries, a circular contact support wall within the recess of the second body member, an inner ring contact fixed within the support wall, an outer ring contact fixed on the outside of the support wall, an inner contact finger attached in the recess of the first body and engaging the inner ring contact when the bodies are engaged with each other, and an outer contact finger mounted similarly to the inner contact finger for engaging the outer ring contact, the ring contacts bein held against displacement by bent portions tierefrom engaging the material of the said support wall.

3. An electric swivel connector, an insulation body with an inner shield projecting wall forming a recess within its boundaries, a second insulation body with an outer shield projecting wall engageable against the inner shield wall and forming a recess within its boundaries, a circular contact support wall within the recess of the second body member, an inner ring contact fixed within the support wall, an outer ring contact fixed on the outside of the support wall, an inner contact finger attached in the recess of the first body and'engagin'g the inner ring contact when the bodies are engaged with each other, and an outer contact finger mounted similarly to the inner contact finger for engaging the outer ring contact, the bodies being formed with apertures, and leads passing thru the said apertures and attached on the contacts by set screws, the ring contacts being provided with projecting lugs for receiving the said leads.

Signed at New York city, in the county of New York and State of New York this 12th day of October, A. D. 1928.

ARILD ANNENEUS MARNDORFF NIELSEN.

comprising

Images