US1558808A - Lamp bracket - Google Patents

Description

S. P. HULL LAMP BRACKET Filed Oct. 1 1924 2 Sheets-Sheet 1 INVENTOR.

' ATTORNEY.

Oct. 27,1925. 1,558,808

S. P. HULL I "LAMP amour Filed Oct. 16. 1924' ZShgets-Shget 2 IN V EN TOR.

V ATTORNEY.

Patented Get. 27, 1925.

SAMUEL P. HULL, OF YONKERS, NEW YORK.

LAM]? BRACKET.

Application filed October 16, 1924.

To all 10/10 22; it may. concern:

Be it. known that I, SAMUEL P. HULL, a citizen of the United States, and resident of Yonkers. in the county of lVcstchester and State of New York, have invented certain new and useful Improved Lamp Bracket, of which the following is a specification.

This invention relates to lamp brackets and particularly to a type of bracket upon which a lamp or a source of light may be adjustably positioned so as to direct a beam of light from said source in a predetermined direction, and has for an object to provide a bracket which may be positioned with precision relative to a fixed support, the bracket in turn, supporting a lantern or a device from which a beam of light is projected.

The lantern is detachable and when replaced.

will always find the same position relative to the lamp bracket. Another object of the invention is to provide a lantern support to which any standard type of lantern may be applied without change or adjustment for this purpose. Theseand other objects of the invention will be understood from the following specification and the accompanying drawings, in whiclnFig. 1 is an end eleva tion, of a lamp bracket constructed according to thisinvention, 2 is a corresponding side elevation and Fig. 3 is a plan view. Fig, 4; shows a standardtype of lantern for use with this bracket, Fig. 5 is another view of the same lantern, partly in section, show- .ing the supporting bracket in place, Fig. 6

is a detail of a modification of the bracket, Fig. 7 shows how the lantern maybe adjusted to regulate the light beam in the vertical plane and Fig. 8. shows a plan view of the lantern used for signal lights on a. railway trackwith-the beam adjustable in'the horizontal plane.

The present invention is illustrated in connection with railway signal lights which, for proper operation, must be capable of horizontal adjustment to project a beam horizontally aligning with. the track rails, and which must alsogbe adjustable vertically, so that the beam willbe most effective in the range of vision of an approaching locomotive. This, however, is no limitation of the uses of the invention as it canv be applied to any construction where a detachable 'device is required to-be relocated with precision.

The invention comprises a bracket pivot- Serial No. 744,056

ally adjustable on a fixed support. This bracket has a stem with a three point hearing which engages a sleeve of the lantern. The baseof the bracket is provided with a pair of inclined planes located one on either side of the stemwhich engages the base of the lantern forming a three point bearing between the base and the sleeve which is at right angles to the three point bearing of the stem. This construction provides a three point wedging engagement between the bracket and the lantern in two planes at right angles to each other, corresponding to the planes of the projected beam of light. Thus, each time the lantern is replaced it will wedge into the same position and be maintained there without lost motion thereby securing precision in the direction of the light bean Referring to the drawings, 12 is a fixed support usually a clamp as 42, on the mast 41, Fig. 7. 11 is the flange of the bracket secured to 12 by bolts 13 and 141-. in the horizontal plane and spaced therefrom by studs i 15 and 16 in the vertical plane. By varying the tension on: 13 and 14, the bracket turns about the studs 15 and 16, and by regulating 15 and 16 the bracket turns uponlS and 14. The stem 18 is thus adjustable to the right or left as shown in Fig.v 1 and is rotatably adjustable about a line drawn through 15 and 16 as a centre.

The bracket is provided with abase 17 from which the stem 18 projects at one end. This stem is provided with the projection '20 on the mid-centre of one side and the projections 19 and 21, spac'edas shown,

with relation to 20 on the opposite side.

The projection 21 is adjusted by inserting a wedge in slot 22 and forcing the'lug carrying 21 outwards, or by the use of a'hammer this lug. maybeforced' inwards. The stem ,18 is made from malleable ironuor other the stem 18 thereby preventing the edge of the lamp being obstructed in its vertical movement by these points.

The lantern 31 may be of the usual type with the lens 32 and the circular base 33. A. sleeve 35 at one side of the lantern engages the stem 18 and is primarily its means of support.

When the sleeve 35 is inserted on stem 18 the projections 19, 20 and 21 engage the sides of the sleeve as indicated in Fig. 5:. The lug 22 is adjusted so that a snug fit is obtained without lost motion and thereby the vertical position of the beam is determined.

When the lantern base 33 engages the wedges 23 and 2 it is forced away from 18 thereby making a three point bearing between A3, 2 1 and the outer side or" the sleeve at 36. Thus, the lantern is forced to assume a definite position horizontally which projects the light beam in the predetermined direction. The lantern may easily be removed and replaced which is engaged by the stem 18 and by the Wedges 23 and 24 as described and the predetermined direction of the light beam is thus assured.

In Fig. 6 the wedge 38 is arranged to.

engage the inner edge of the lamp base 37 as shown instead of the outer edge as shown in Fig. 4.

The projected beam may be adjusted in the vertical plane aa Fig. 7 by adjusting the vertical position of 18 and it may be adjusted in the horizontalposition b?). Fig. 8, aligning with track 14: by rotating bracket 11 on pivots 15 and 16. These are the only adjustments necessary for the purposes shown.

Having thus described my invention, I claim:

1. In a lamp support of: the class described, the combination of a bracket with a stem, a lantern with a sleeve engaging said stem, three spaced projections on said stein engaging said. sleeve to form a threepoint bearing, said stem being made ofbendable material whereby one of said projections is adjustable with relation to the others 7 2. In a lamp support of theclass described, the combination of a bracket with a vertical stem, a pair of inclined planes. onev on each side of the baseoif said stein,

a lantern slidably engaging said vertical 3. In a lamp support of the class described, the combination of a bracket with a horizontal portion and a vertical stem, a pair of spaced inclined planes on said hori zontal portion and a lantern slidably engaging said vertical stem, the base of said lantern being arranged to engage said inclined planes whereby said lantern is rigidly held against rocking on said stem.

4. In a lamp support of the class described, the combination of a bracket having a horizontal portion and a vertical stem, a pair of spaced inclined planes on said horizontal portion, a. lantern slidably engaging said vertical stem, means for preventing side motion of said lantern on said stein and the base of said lantern being arranged to engage said inclined planes whereby said lantern is prevented from rocking on said stem.

5. In a lamp support of the class described, the combination of a fixed support, a bracket having a horizontal portion and a vertical stem, a pair of spaced inclines on said horizontal portion, said bracket secured to said support and adjustable in two planes at right angles to each other, a lantern slidably engaging said vertical stem, means for preventing side motion of said lantern on said stem and the base of said lantern bescribed, the combination of a one piecev bracket with a vertical stein having a plurality of spaced inclined planes, a lantern with a plain sleeve engaging said stem,

means associated with said stem for determining the horizontal position of said lantern and means including said inclines for determining the vertical position oii said lantern.

7. In a lamp support of the class dc- .supported by a bendable projection on said stem whereby it may be positioned to prevent lost motion between said stem and said sleeve.

Signed at New York, in the county of New York and Stateof New York,-this 31st day of January, A D. 1924.

SAMUEL P. I-IULL.

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