US1530975A

US1530975A - Lamp fixture

Info

Publication number: US1530975A
Application number: US633107A
Authority: US
Inventors: Meigs W Bartmess
Original assignee: National Screw and Manufacturing Co
Current assignee: National Screw and Manufacturing Co
Priority date: 1923-04-19
Filing date: 1923-04-19
Publication date: 1925-03-24
Anticipated expiration: 1942-03-24

Description

March 24, 1925. 1,530,975

M. w, BARTMESS LAMP FIXTURE Filed April 19, 1923 Luz)??? W ivzl i i Patented Mar. 24,- 1925.

UNITED STATES- PATEN or 1,530,975 FICE."

MEIGS w. BARTMESS, or CLEVELAND, o nro, ASSIGNOR T0 TI-IENATIONAL' scnnw AND MANUFACTURING COMPANY, or cLnvnLAnn, OI-IIO, A. CORPORATION or oHIo. I

LAM? FIXTURE.

Application filed April 19, 1923. Serial No.- 633,107.

To all whom it may concern:

Be it known that I, Mines N. BAn'rMnss,

a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Lamp Fixtures, of which the following is a full, clear, and exact description.

This invention relates to a lamp fixture, and partlcularly to an improved shade or reiiector holder, especially of the type involvmg an expansible locking ring such as illustrated in U. S. patents to Mould, Nos. 1,015,

588 and 1,298,770, which are owned" by the assignee of the present invention.

The object of the present invention is to provide a construction wherein the shade is fastened to the. holder in a more secure manner, and particularly in a manner such as to avoid the possibility of a shade rattling whenthe fixture is subjected to vibration or tothe action of the wind.

iThis advantage is gained by the present invention by providing means whereby when the locking ring enters the groove which is adapted to receive it, it secures the shade to the holder in a non-vibrating relation thereto by bringing one part against one or more abutting shoulders provided on the other art. I P The invention may be further briefly summarized as consisting in certain novel details of construction, and combinations and arrangements of parts which will be described in the specification and pointed out 111 the appended claims.

In the accompanying sheet of drawings wherein I have shown the preferred embodiment of the invention, Fig. 1 is a side elevation of my improved lamp fixture with parts in section; Fig. 2 is a view looking at the lower end of the shade holder with the shade removed, a portion being broken away; and Fig. 3 is a view looking at the top of the shade with a portion broken away.

Referring now to the drawings, 10 represents the shade holder as a whole, and 11 represents the shade or reflector, it being understood that the holder is designed to receive and support the lamp receptacle which is not here shown.

The holder like the holder shown in the second Mould patent referred to above, preferably includes an upper dome 10, a corru-v the dome and is secured therein, and a lower sleeve or ring 10 fitted into and SG-ClllEdlll the lower end of the'corrugated sleeve 10,

the sleeve or ring 10 having anannular bead 10 forming an inwardly facing groove into which the locking ring is adapted to be eX- pancled.

The shade 11 is provided with aneck 11 having an annular bead 11 with an out-' wardly facing groove, and in this instance as in the first Mould patent referred to, the neck carries the expansible and contractible locking ring 12. The wall forming this groove 11 is cut away at two diametrically opposite points forming a pair of slots, one designated 11, and through this slot the free ends 12 of the locking ring 12 project into the interior of the neck as shown in Figs. 1 and 3 so thatthey can be conveniently grasped and pressed together-so as to contract the ring to permit the-insertion or-removal of the shade. The slot in'the neck of the shade diametrically opposite the slot 11 is indicated at 11 this slot receiving the in.- wardly bent portion 12 of the locking ring.

The construction so far described is not new with me, but while in the prior constructions involving a locking ring substantially as herein shown, the ring would retain the shade on the holder, there was, however, the objection that the shade under cer tain conditions such as those already mentioned would rattle.

This is overcome by my present invention wherein provision is made for causing the locking ring to drawone of the parts against a holding abutment of the other part as the ring expands and enters the groove which is adapted to receive it. I regard it within the scope of my invention to provide the abutment on the shade, in which event it will be in the form of a seat adaptedto be engaged by the lower part of the holder, or the abutment may be on the holder, in which event it will be engaged by the top of the shade. The latter embodiment is preferred, and in this embodiment the abutment pref erably is in the form of a plurality of inwardly bent tongues 10 struck inward from the sleeve or ring 10. In this instance the tongues are doubled upon themselves as, shown in Fig. 1 to provide the desired stiflness. Diiferent numbers of the tongues may be provided, but four of the same arranged 9Q apart have been found to be very ,satisfactory. Thesetongues are so disposed that when theneck of the shade is inserted in the sleeve or ring 10 and the locking ring al lowed to expand in the groove of the holder, the ring engages the upwardly inclined lower part of the groove of the holder, and a oamming action is provided which torces the upper end of the shade securely against the tongues or shoulders 10 and holds the shade constantly in that position. In consequence there is absent entirely the rattling to which prior devices of this nature have been susceptible.

While I have shown only the preferred embodiment, I do not desire to be confined to the exact details shown, but aim in my claims to cover all modifications which do not involve a departure from the spirit and scope of the invention as defined in the appended claims.

Having described my invention, I claim:

1. In a lamp fixture, a shade and a shade holder having a part into which the neck of the shade is adapted to be inserted, the neck of the shade having an expansible and contractible locking ring and the holder having a groove into which the ring is adapted to expand, one of said parts having an abutment against which the end of the" other art is pressed by the locking ring when t e latter is in looking position.

2. In a lamp fixture, a shade holder and a shade having a neck adapted to be inserted in a portion of the holder, the neck of the shade having an expansible and contractible locking ring, and the holder a groove'into which the ring is adapted to expand, the holder having an abutment against which the end of the shade is pressed when the locking ring is in looking position.

3. In a lamp fixture, a shade holder having a lower annular'part, a shade having a; neck adapted to enter said annular part, the neck of the shade having an expansible and contractible locking ring, and said annular part of the holder having a groove adapted to receivethe looking ring and having also an inwardly projecting portion adapted to be engaged by the neck of the shade and to be pressed thereagainst by the locking ring.

4;. In a lamp fixture, a shade holder'having a lower annular part and a shade having a neck adapted to be inserted therein, one of said parts having an eXpa-nsible and con- ,tractiblelocking ring, and the other having a groove adapted to receive the same, and

said holder having a plurality of inturned tongues against which the end of the neck of the shade is pressed by the locking ring when the latter is in locking position.

In testimony whereof,,I hereunto aflix my signature.

MEIGS W. BARTMESS.