US368955A - Mast-arm for hanging electric street-lamps - Google Patents

Description

(.No Model.)

P. H. LAOEY.

MAST ARM FOR HANGING ELECTRIC STREET LAMPS.

Patented Aug. 30, 1887.

ZZZ/92242721 Wzkfzssiisr n. PETERS Plumb-Lithographer. Washingiun. u. c.

UNITED STATES PATENT OFFICE.

FRANCIS H. LAOEY, OF ATOHISON, KANSAS.

MAST-ARM FOR H ANGING'ELECTRIC STREET-LAMPS.

SPECIFICATION forming part of Letters Patent No. 368,955, dated August 30, 1887.

Application filed May 9, 1587. Serial No. 237,605. (No model.)

To all whom it may concern.-

Be it known that I, FRANCIS H. LAOEY, a cltizen of the United States, residing at Atchison, in the county of Atchison and State of Kansas, have invented certain new and useful Improvements in Mast-Arms for Hanging Electric Street-Lamps; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to supports for lamps,

and is principally designed for suspending electric lamps, and relates most particularly to that class of supports which have a mastarm mountedupon the top of a stake or pole planted in the ground.

The object of the invention is the production of means whereby the mast-arm can clear obstructions-su ch as telephone, electric-light,

and telegraph wires, trees, &c.when lowered or tilted about its pivotal connection with the pole, and to provide means for the ready manipulation of the mast-arm and for counterbalancing it and the lamp.

The improvement consists in the novel features of construction, hereinafter more fully described, claimed,and shown in the annexed drawings, in -which-- Figure 1 is a perspective View. of a support embodying my invention, showing the tilting motion of the mast-arm by dotted lines; and Fig. 2 is a plan view showing the lateral motion of the mast-arm by dotted lines.

The stake or pole A is surmounted by the metal cap or ring 13, and has the bracket 1) extended from its front side and the forked plate I) projected vertically from its rear side.

The mast arm O, suitably braced by the trussbars D, extended from end to end thereof, and held in position by the struts d, is mounted upon the end of the bracket b, and normally rests in the fork of the plate I). The mounting is of such nature as to admit of the tilting of the mastarm to lower its outer end and its swinging laterally to avoid obstructions, and is composed of the clip E, pivotally connected at its upper end with the mast-arm, and havthe hook in such position that a lamp suspended from the hook will rest in the fork of the plate f and be held against any disturbing element which would have a tendency to cause a swaying of the lamp.

The lever G is fixedly connected at its upperend with the mast-arm just in the rear of the forked plate I), and extends down alongside the mast-arm to within convenient reach, and its lower end is locked to the pole. The bracerod 9, extended between the end of the lever and the rear end of the mast, stiffens the lever and prevents its breaking or bending. The stay gt further strengthens the lever.

In practice the mast-arm is mounted upon the pole or stake, and the lever G may be used as a meansto assist in the mounting. To lower the outer end of the mast-arm--as for trim- Ining the lamp or for any purpose-the lower end of the lever is unlocked from the pole and pushed outward and away therefrom, which effects a tilting of the mast-arm about its pivotal connection with the clip. As the mastarm lowers, the lever correspondingly rises, and to have the lever under control a string or cord must be attached to its outer end, so that a pull upon such cord will bring the lever within reach. The lever in its elevated position acts as a counter-balance for the mast-arm and lamp, and is of such weight as to balance the mast-arm and lamp when the latter is within easy reach. When the lever is locked to the pole, the mast-arm cannot be lowered and the lamp be tampered with..

Having thus described my invention, what I claim, and desire to secure by Letters Patent,

1. The combination, with the pole and the mast-arm mounted thereon,of auniversal-j oint connection interposed between the mast-arm and pole, whereby the mast-arm can be tilted and simultaneously swung laterally, substan tially as and for the purpose described.

2. The combination, with the pole, the bracket, and the forked plate, of the mast-arm resting in the fork of the plate, and the clip journaled in the bracket and pivotally connected with the mast-arm, substantially as set forth.

3. The combination, with the mast-arm, of 5 the lamp-hook and the forked lamp-steadying plate arranged below the hook, substantially as and for the purpose described.

4. The combination, with the pole and the mast-arm, of the lever rigidly connected at its 10 upper end with the mast-arm and extended down alongside the pole, substantially as and for the purpose set forth.

5. The combination,with the pole, the forked plate I), the bracket b, and the clip E, pivoted to the mast-arm and journaled in the bracket, of the lever rigidly connected at its upper end with the mast-arm and extended down alongside the pole, for the purposes set forth, the brace g, and the stay g, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

FRANCIS H. LACEY. Vitnesses:

GEORGE F. KUHNs, JOHN P. ADAMS.

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