US795131A - Electric-light fitting. - Google Patents

Description

PATBNTED JULY 18, 1905.

J. G. IRVING. ELECTRIC LIGHT FITTING.

APPLICATION FILED AUG. 26, 1904.

VIII/III] [Ill ANDREW I1 GRAHAM m l-mmlmmclupmzna WMHINGI'OMEC Patented July 18, 1905.

PATENT @rricn.

JOHN GEORGE IRVING, OF NOTTINGHAM, ENGLAND.

ELECTRIC-LIGHT FITTING.

SPECIFICATION forming part of Letters Patent No. 795,131, dated July 18, 1905.

Application filed August 26, 1904. Serial No. 222,250.

To all whom, it may concern:

Be it known that 1, JOHN GEORGE IRVING, a subject of the King of Great Britain, and a resident of the city of Nottingham, England, have invented new and useful Improvements in Electric-Light Fittings, of which the following is a specification.

This invention relates to an improved fitting for carrying an incandescent electric lamp, and has for its object the production of a fitting by which the electric-lamp holder can be moved to and from a point of support and be placed in any position on imaginary semispherical surfaces having the point of support as their center and also by which the lamp can be placed in any position on an imaginary semispherical surface having for its center the end of the rod or bracket between the point of support and the lamp-holder, also means by which the lamp isheld in its placed position.

In the drawings which are attached hereto, Figure 1 is a side elevation of the improved fitting. Fig. 2 is a front elevation of the same. Fig. 3 is a section on the line A A, Fig. 1. Fig. at is an elevation of the plate between the supporting-joint and the lampholder rod er bracket. Fig. 5 is a side elevation, to an enlarged scale, of the lampholder bracket and joint. Fig. 6 is a front elevation of the same. Fig. '7 is a section on the line 13 B, Fig. 5, and Fig. 8 is a section on the line C (l, Fig. 6.

According to the arrangement shown in the drawings the improved fitting is suspended from the ceiling; but it may be attached to a wall or to any other convenient fixture.

The fitting is attached to the ceiling by a plate 1, and integral with it there is a friction-plate 2, provided with a hole for the bolt These pieces'form part of a friction-joint which comprises the plate 2, bolt 3, an outer plate 4, which is prevented from turning by feet 5, two intermediate friction-washers 6, which may be of leather, wood, vulcanite, or other similar material, a spring 7, by which the surfaces of the various parts are held in frictional contact, and a center plate 8. This latter is integral with and at right angles to another frictional plate 9, which has a hole for the bolt 10 and forms part of a second frictional joint which includes the plate 9, bolt 10, the two intermediate "friction-washers 11, of wood, leather, vulcanite, or the like, an outer plate 32, which is prevented from turning independently on the axle 10 by jaws 33, which engage with a projection on the plate 8, a spring 12, and a center plate 13, which is made with a shoe 14 for carrying a rod or arm 15. The rod or arm 15 is arranged in conjunction with a sliding rod or arm 16, which is held in its placed position by a clip 17, fixed to the upper end of the rod or arm 16, and a clip 18, which is fixed to the lower end of the rod or arm 15 and carries the adjustable friction-spring 19.

The lower end of the rod or arm 16 is fitted with a bracket 20, which has a projecting foot 21 and carries a hollow axle 22, which in its turn carries a lamp-holder bracket. This consists of an upper piece 23, to which a lower piece 24 is pivoted, while between the pieces and 23 there is a spring 27, which forms a frictional brake and holding device. The piece 23 is provided with a pin 26, by which its rotation on the axle 22 is limited, and there is a thumb screw and nut 28, by which the piece 24. can be fixed in any desired position or by which a frictional pressure can be set up, while the hollow axle 22 may be fixed to the bracket 20 or to the piece 23, or it may be free to rotate in both.

The l2Lll11')-ll()l(l6l' 29 is of any ordinary description and is attached to the lower end of the piece 2 1, and it also carries the lamp 36 and shade 3.1 in the usual manner. The lamp is connected by a flexible wire 36 to any convenient point or switch 35, and such wire is laid in grooves on the arm 16 and may be protected by a rubber tube 31 between the end of the rod or arm 16 and the lamp-holder 29.

By means of the invention herein described the lamp can be turned in either direction round the pivots carrying the piece 24 and. with the piece 24: can be turned partly round the hollow axle 22, the rotation of which is p with the joint.

limited by the pin 26 and projection 21 to prevent the wires being twisted together. By these means the lamp can be moved to any position on an imaginary semispherical surface having the end of the rod or arm 16 as an approximate center and is held in its placed position by the. frictional devices connected The lamp can also be moved to and from the fixed support by sliding the rod 16 on the rod 15, and it can be turned round either or both of the bolts or axles 3 and 10 and can thus be placed in any position on imaginary semispherical surfaces having approximately their center at the point of support and is held in such placed positions by the frictional devices hereinbefore described.

The rods 15 and 16 may be of wood orother solid material or of suitably-sectioned tubes which may slide side by side or one inside the other, and the other parts of the fitting may be of any suitable material, while the joints on the axles 3 and 10 may be made without the intermediate friction-washers.

What I claim as my invention, and desire to secure by Letters Patent, is

In an electric-light fitting, the combination of a supporting-rod, a bracket 20 at the outer end thereof provided with a projecting foot 21 and an axle 22, a lamp-holding bracket consisting of a member 23 pivotally connected with the axle 22, and another member 24 with which the lamp is connected, the members 23 and 24: being connected with each other by a pivot whose axis is at right angles to the axle 22, and a pin 26 carried by the lamp-holding bracket and arranged to engage with the foot 21 to limit the rotation of the lamp-holding bracket, substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN GEORGE IRVING.

Witnesses:

WILLIAM H. POTTER, JOHN ARCHER.

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