US1754001A - Lighting fixture - Google Patents

Description

April 8, 1930. A. G. STE'INMAYER LIGHTING FIXTURE Fild March 26, 1927 2 Sheets-Sheet 1 Alwm Gjpamma- April 8, 1930. A. G. STEINMAYER LIGHTING FIXTURE Filed 'March' 26, 1927 2 Sheets-Sheet 2 Q A1wm E- Etammay p;

' claims, it being understood that such Patented Apr. 8,, .1930 v UNITED STATES PATENT OFFICE ALWIN G. STEIN'MAYER, 0F MILWAUKEE, WISCUNSIN, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO LINE MATERIAL COMPANY, OF SOUTH MILWAUKEE, WISCONSIN, A GOR- ZEORATION OF DELAWARE LIGHTING FIXTURE Application filed March 26, 1927. Serial No. 178,578.

This invention relates to street lighting fixtures and refers more particularly to the means for suspending the same from its supporting structure. The voltage employed in the series system of street lighting is often greater than that which may be safely handled by the insulation of the conventional fixture, which is most frequently of dry process porcelain, and this invention has as an object the provision of a member inserted between the fixture proper and the supporting structure and of a material, such as wet process porcelain or the like, whereby the insulating capacity of the fixture is increased.

Another object of this invention resides in the provision of means for increasing the insulating capacity of a lighting fixture without materially With the above and other objects in view which will appear as the description proceeds, my invention resides in the novel construction, combination and arrangement of parts substantially as hereinafter described and more particularly defined by the appended ianges in the precise embodiment of the herein disclosed invention may be made as come within.

the scope of the claims.

In the accompanying drawings, I have illustrated three complete examples of the physical embodiment of my invention'constructed according to the best modes I have so far devised for the practical application of the principles thereof, and in which:

Figure 1 is a sectional view of a portion of a lighting fixture illustrating my improved insulator cap applied thereto;

Figure 2 is a fragmentary view similar to Figure 1 and illustrating a modified form of my invention, and

Figure 3 is a view, partly in section and partly in elevation, means for adjustably mounting the type of receptacle illustrated in Figure 2.

Referring now more particularly toithe accompanying drawings, in which like numerals designate like parts throughout the several views. the numeral 5 designates the body portion of a conventional lighting fixture so usually formed of dry process porcelain and altering its structural design.

illustrating another recessed at 6 and 7 to receive a lamp socket 8 and its mounting means consisting of a pair of spring clipsor fingers 9, between which the prongsior bayonets 10 of the socket are removably retained. The lower portion of each. finger 9 is directed laterally and is clamped between a shoulder 11 at theinner end of the recess 6, and aterminal member 12, by bolts 13 mounted in the body portion and having threaded engagement with the terminal members.

Lead wires 14 enter the recess 6through apertures 15 in the walls thereof and are electrically connected with the terminals in any conventional manner, and the usual shade or reflector 16 is suitably mounted in the lower portion of the recess, as illustrated.

An inverted cup-shaped insulator cap 17 of wet process porcelain, or other material having like resistance value, is secured to the upper portion 18 of the dry process body member 5 by cementing or other means, and, if desired, studs 19 may be passed through aligned openings in the cap 17 and the upper portion of the body 5, to act in conjunction with the cemented joint.

The member 17 may be provided with a lateral flange or skirt 20 if desired, and a hood or'canopy 21 suitably secured to the .upper portion thereof by screws or like means 22 suspends the fixture from a supporting structure, not shown.

In Figure 2 I have illustrated a modified form of my invention in which a wet process porcelain insert 23 is secured 1n the aperture 24 of the dry process porcelain body member 5 by cementing or other suitable means to suspend the fixture from its supporting structure, not shown. A downwardly extended threaded stud 25 is carried by the insert 23 and provides means for adjustabl mounting a'receptacle 26 with which the soc et member 8 is removably connected and mounted in the.

upper portion of the insert 23 is a ring member 27 to provide means for suspending the fixture from the support, not shown.

The structure depicted in Figure 3 illustrates another means for adjustably mounting the receptacle 26 and comprises a substantially inverted U-shaped bracket member 28 secured by screws or other means 28 to the under side of the insert 23, the legs of which are longitudinally slotted, as at 29. Suitably secured to the receptacle 26 and positioned diametrically opposite thereof, is a pair of downwardly extended members 30, which are slidably mounted between the legs of the U-shaped member 28 and are adjustably secured thereto by threaded studs 31. The studs are slidably mounted in the longitudinal apertures 29 and passed through apertures in the members 30, and have a nut 32 threaded on their outer ends to,bind the members 30 to the legs of the U-shaped member in any desired adjusted position.

WVhat I claim as my invention is:

1. The combination with a lighting fixture for use with relatively high voltages having a housing comprising an iregularly shaped body member with a plurality of apertures, which member due to such irregular configuration is formed ofinsulating material incapable of safely withstanding relatively high voltages, of an insulating member having the capacity to successfully withstand such voltages, means connecting the latter insulating member with the bodymember of the fixture, and a supporting member for the fixture connected with the second mentioned insulating member.

supporting member for the fixture, the body member due to its irregular configuration being formed of insulating material incapable of providing safe insulation between the lamp receiving means and the supporting member, and an insulating member having the capacity to withstand relatively high voltages interposed between the body mem her and the supporting member to provide the proper insulation between the lamp receiving means and the supporting member.

5. In a lighting fixture including an irregularly shaped body member having a plurality of apertures and formed of insulating material incapable of withstanding relatively high voltages, an upwardly extended portion on said body member, an inverted wet process porcelain cup-shaped insulator cap, means mounting the cap on the upwardly extended portion of the body member whereby the insulating capacity of the body member is increased, and means carried by the cap for suspending the fixture from a support.

In testimony whereof, I hereunto afiix my signature.

ALWIN G. STEINMAYER.

2. The combination with a lighting fixture for use with relatively high voltages having a housing comprising an irregularly shaped body member with a plurality of apertures, which member due to its irregular configuration is formed of insulating material incapable of sucessfully withstanding relatively high voltages, of an insulating member of wet process porcelain and having the capacity to successfully withstand such voltages, means connecting the latter insulating 3 member with the body member of the fixture, and a'supporting member for the fixture connected with the second mentioned insulating member.

8. The combination with a lighting fixture for use with relatively high voltages having a housing comprising an irregularly shaped body member with a plurality of apertures, which member due to its irregular configuration is formed of dry process porcelain which is incapable of withstanding relatively high voltages, of a wet process porcelain insulating member having the capacity to successfully withstand such high voltages, means connecting the latter insulating memher with the body member of the fixture, and a supporting member for the fixture connected with the second mentioned insulating member.

4. The combination with a lighting fixture for use withgrelatively high voltages having an irregularly shaped body member with' aplurality of apertures and lamp receiving means mounted within the bodymember, of a

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