US482112A - Hope electric - Google Patents

Description

(No Model.)

2 Sheets-Sheet 1.

A. WRIGHT. 1

SUPPORT FOR ELECTRIC LAMPS. 110,482,112.

Patented Sept. 6, 1892-.

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2 Sheets-Sheet 2.

(No Model.)

A. WRIGHT. SUPPURT FOR ELBCTRIU LAMPS.

Patented Sept. 6, 1892.

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UNITED STATES PATENT OFFICE.

AUGUSTUS WRIGHT, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO THE HOPE ELECTRIC APPLIANCE COMPANY, OF SAME PLACE.

SUPPORT FOR ELECTRIC LAMPS.

SPECIFICATION forming part of Letters Patent No. 482,112, dated September 6, 1892.

Application led March 23, 1892. Serial No. 426,081- (NO model.)

To all whom it may concern: pulley 10, journaled therein, and extending Be it known that l, AUGUSTUS VRIGHT, of from the casting is a tubular mast-arm 11, the city of Providence,in the county of Provithe outer end of which is suitably stayed to denceand State ofRhodelsland,haveinvented sustain lateral and downward pressure. The D certain new and usefullmprovements in Sup- Strap by which the outer end of the upper ports for Electric Lamps; and I do hereby destay-rod 12 is secured to the mast-arm is exelare that the following is a full, clear, and extended to form the bearing-block 13, having a act description of the same, reference being rounded upper surface, and pivoted to this had to the accompanying drawings, forming block by the screw 14 is a pulley -frame 15, 6o 1o part of this specification. which encircles the mast-arm and carries the This invention has reference more espepulley 16 having flanged ends,journaled becially to supports for electric lamps, by means tween the ends of said frame, and near the of which the lamps are supported over a outer end of the mast-arm is secured a pair street or roadway when in use, but are readily of depending fingers 17, between which the 65 accessible for trimming or repairs. drop-arm is engaged when the lamp is ele- The objects of the invention are to produce vated. a support for electric lamps in which the op- The drop-arm 1S is pivoted to the mast at a erating mechanism shall be less cumbersome point below the mast-arm and is tubular to than heretofore and at the same time more contain and protect the local-circuit Wires, 7o 2o durable in construction and effectiveV in opwhich extend to the lamp 19, supported on the eration. end of this arm, or to a band 20, surrounding The invention consists in the peculiar conand secured to such end. This band has its struction of the mast and arm and the comends closed by a bolt, to which is fastened the bination therewith of means whereby a flat fiat metal band 2l, which extends over the 75 metal band or ribbon may be used for elevatpulley 16, through the hollow mast-arm 11, ing and sustaining the weight of the lamp over the pulley 10, and finally down through under the various conditions to which it the runway 22, secured tothe mast, to the capmust be subjected in practical operation. stan-drum. The capstan is contained within Figure 1 represents an elevation of the imthe case 23, which, being of small size, can be 8o 3o proved lalnp-supporting device. Fig. 2 repsecured to the street side of the pole 6 withl'esents an enlarged end View of the mastout extending into the street. The band or arm, the rocking pulley secured thereto, and ribbon 21 enters the case through a slot formed the band passing over the pulley and supin the top thereof and is secured in a circum- 'porting the outer end of the drop-arm, to ferential groove of the drum 24, which is se- 85 which the lamp is secured. Fig. 3 represents cured on the shaft 25, journaled in bearings a vertical sectional view of the capstan-box formed in one end of the case and in the to show the inner construction thereof. Fig. bracket 26. Around one end of the drum ex- 4 represents a horizontal sectional view of tends the brake-strap 27, secured at; one end the same. Fig. 5 represents an end view of to the casing and at the other to a lever 2S, 9o 4o the capstan-case, showing the means for closextending through and pivotcd in a perforaing the perforation through which the cranktion cut through the bottom of the case. The shaft is inserted and for locking said shaft in drum 24 is also provided with a 'ratchet 29, se-

place. cured thereto, and a pawl 30, having the de- Similar numbers of reference designate corpending arm 3l, is pivoted to the back of the 95 responding parts throughout. case and engages said ratchetwhen not raised In the drawings, 6 indicates a mast or pole by said arm. The shaft 32 of the crank 33 is on which wires may be secured to the crossinserted through the perforation 24 in the arms? 7 or otherwise. At asuitable distance end of the capstan-case. The end of this from the ground is secured the hollow castshaft has a conical enlargement 35, in which roo 5o ing 8 by means of the yokes 9 9, clamped to is formed an axial recess adapted to receive the pole. This casting 8 is provided with a the end of the shaft 25 and a transverse slot for engaging the piu 36, extending through said shaft. As the conical enlargement 35 is pushed inward the lower end of the arm 31 is lifted by riding up over the same and raises the pawl 30 from engagement with the ratchet 29. The capstan-drum is now free `to rotate, but may be held by means of the brake or by the crank-handle.

The lamp may be rapidly lowered and the speed governed by the use of the brake without danger from the crank fiying off, as when the crank of the shaft is pushed inward a groove 37, extending around the shaft, is engaged by the edge of the plate 38, pivoted to the outer side of the capstan-case and operated by the counter-weighted arm 39 inside of the case. This plate 38 also serves to close the perforation 34 when the crank is withdrawn and is covered bythe hollow rosette 40, having a slot in its lower circumference,

. through which the dependingarm 4l extends.

By means of this arm the plate 38 is moved to one side to allow the entrance of the crankshaft.

The use of a metal band of ribbon as a means for raising the lamp to position is very desirable, owing to the small amount of space re.

quired for its storage in the capstan-case, and avoiding the use of the large and unsightly runway on the mast. I have found in practice that a metal ribbon one thirty-second of an inch thick and five-eighths of an inch wide will sustain a weight of nine hundred pounds. The length of the ribbon required for the operation of an ordinary lamp would not when wound on a six-inch capstan-drum in a single roll increase the diameter of the drummore than one-half inch.

The metal ribbon is more durable than the ordinary rope under longitudinal strain; but when exposed to lateral strains, as from the swinging of a lamp, the edges of the ribbon soon begin to tear, and this is especially true where the bearing-surface over which the ribbon is stretched is rigid. To avoid these diiiculties, I have invented a rocking bearing, which will give in proportion to the swing of the lamp and prevent the edges of the ribbon from wearing on the bearing-surface of the pulley 16.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In an electric-lamp support, the combination, with a mast-arm suitably supported, a pivoted drop-arm, a lamp secured to the end thereof, and a metallic band by which the lamp is sustained, of a rocking bearing over which the band is passed, carried by the outer end of the mast-arm, as described.

2. In a support for electric lamps, the combination, with a mast-arm suitably supported and a bearing-block 13, secured thereto, of the pulley-frame 15, bearing ou said block and secured by the screw 14:, a pulley 16, journaled between the ends of said frame, a metallic band 21, bearing 011 said pulley, and a lamp secured to the end of said band, as described. 3. In a support for electric lamps, the combination, with a mast and an arm extending therefrom, of a capstan-case 23, a drum 24, carried by the shaft 25, having the pin 26 journaled therein and having a groove to receive the band 21, a brake-baud 27, extending around said drum and operated by the lever 28, extending through and pivoted to the bottom of the case, a ratchet-Wheel 29, also secured to said shaft, a pawl 30, having the depending arm 31, pivoted to the back of the case and engaging said ratchet, a crank-shaft 32, having the tapering enlargement 35, an axial recess formed in said shaft and a transverse slot cut through the end portion thereof and adapted to engage the transverse pin 36, a groove 37, formed around said crank-shaft, and a counterweighted pivoted plate 3 adapted to engage in said slot and to be operated by the arm 41, as described.

4. The combination, with the pole 6 and a capstan secured thereto, the hollow casting 8, secured to the upper portion thereof by the yokes 9 9 and suitable bolts, a pulley 10, journaled within said casting, a tubular mast-arm 11, rigidly secured in the end of said casting and having the depending fingers 17 and the upper stay 12, secured tothe outer end of said arm by au elongated strap forming a bearin gblock 13, having a rounded upper surface, a pulley-frame 15, supported by said block and secured in place by the screw 14:, and a pulley 16, journaled between the ends of said frame, of the tubular rigid stay 18, pivoted to the mast 6, and a metallic band 21, secured to the outer end of said stay, passing over said pulleys 10 and 16, and secured at the other end to the capstan-drum contained within said case 23, as and for the purpose described.

h Irwitness whereof I have hereunto set my AUGUSTUS WRIGHT.

Witnesses:

HENRY J. MILLER, JOSEPH A. MILLER, Jr.

IOO

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