US592660A - Telescoping lamp-post - Google Patents

Description

(No Model.)

2 SheetsSheet 1,

J. A. MILLER. TELESGOPING LAMP POST.

No. 592,660. Patented Oct. 26, 1897.

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PATENT FFICE.

JAMES ACTON MILLER, OF NEW HAVEN, CONNECTICUT.

TELESCOPING LAMP-POST.

srncrrrcnrroiv forming part of Letters Patent No. 592,669, dated October 26, 1897.

I Application filed April 25, 18 96.

To aZZ whom it may concern.-

Be it known that I, J AMEs ACTON MILLER, a citizen of the United States, residing at New- Haven, in the town and county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Teleis a specification.

My invention relates toa telescoping lamppost, the object being to provide means for raising and lowering thelamp by telescoping one section of the postwithin another whereby the lamp. maybe elevated and secured at the usual height."or 'readily lowered to convenient reach for being inspected, trimmed, orlighted, or adjusted in any desired position.

The invention contemplates the use of a counterweight forbalancing or normally holding the lamp in the elevated position; and it consists in the novel arrangement, combination, and construction of parts, as hereinafter more fully described and claimed.

In the accompanying drawings, forming a part of this specification, Figure 1 is a view of my improved lamp-post with the lamp lowered. Fig. 2 is a central vertical section with the lamp elevated. Fig. 3 is a central vertical section taken at a right angle to the preceding figure and with the lamp lowered. Fig. 4 is a plan view ofthe post with the'cap removed. Fig. 5 is a diagram showing the arrangement of pulley-chains. Fig. 6 is a section on line a: m, Fig. 3. Fig. 7 is a vertical central cross-section through Fig. 6. Fig. 8 is an enlarged central vertical section of the preferred form of the invention on line m 00, Fig. 10. Fig. 9 is a section on line y y, Fig. 10. Fig. 10 is a cross-section on line of the pulleyaxis in Fig. 8. Fig. 11 is a plan and crosssection on line 2 .2, Fig. 9.

Referring to the drawings, A designates the lamp-post, which consists of a tube or pipe preferably closed at its lower end and having a cap B .screwed over its upper end and perforated centrally'to forrna bearing for the lamp-rod O, which is adapted to slide therein and to be telescoped inside the tube, as shown in Fig. 3. Near the top of post A are. the pulleys d, journaled on pivots d, riveted inthe pipe, both in the same axial line, which line is also radial to the vertical axis of the post, the lamp+rod passing between the pul- Serial No. 589,641. (No model.)

-to permit the chains 6 to pass therein, as

shown in Figs..6 and 7.

The cords .or. chains 8 are attached to the counterweight F and the lamp-rod O at diametrically opposite points and equidistant from the center, and as the pulleys are also.

placed diametrically opposite each other and at the same distance from the center and the said chains pass over the pulleys in opposite directions the strains upon the lamp-rod and counterweight are concentrated in the axial line thereof, and thus pull exactly in the line of motion of said parts. It will readily be understood that if the cords passed over the pulleys in the same direction either the weight or the lamp-rod or the pulleys would require to be offset from a commonaxis, producing lateral strain on one or all of the parts or involving the use of more room for such ofiset and considerable increase of the size of the post, either of which is very undesirable.

In the preferred form of this invention (shown in Figs. 8 to 11, inclusive) the cap B is fitted within the lamp-post and held in place by screws or pins b as shown in Fig. The pivots d of the pulleys are screwed into the metal of the cap, their heads outward and just filling the interior diameter of the tube, to prevent them from becoming loose. The casting or cap is also shaped to fit around the upper half of the pulleys, forming passages 10, in which the chains e travel and out of which they cannot escape or leave the rim of the pulleys. In the bearing in the cap a bushing H is screwed, fitting the lamp-rod, as shown in Figs. 8, 9, and 10. The lower end of the bushing is split into segments r, and the bushing and its seat being made conical the bushing forms a clamp to hold the lamp-rod at any height, it only being necessary to first unscrew the bushing sufliciently to free the rod, which may then be adjusted, after which a half-turn of the bushing serves to clamp the rod tightly in position. In operation as the lamp-rod is hoisted or lowered the counterweight travels in the opposite direction, balancing the lamp and its parts or preponderating slightly to normally hold the lamp elevated, the chains running freely over the pulleys in the movement aforesaid and the lamp-rod and the chains passing freely through the central space and grooves of the counterweight.

By this device the lamp may be brought readily within reach or elevated to the usual height of street-lamps, for which use it is especially adapted, as also for use in parks and private grounds and on lawns. The parts maybe easily constructed and assembled, and the invention is strong and durable.

I claim as my invention 1. In a telescoping lamp, the combination of a hollow base or tube, a cap or hearing fixed at the upper end thereof, a lamp-rod fitting and adapted to slide in said cap, a pair of pulleys pivoted within the base on opposite sides thereof and with their centers radial to the vertical axis of the base, flexible connections secured to the lamp-rod and passin g over said pulleys in opposite directions, and a counterweight supported by the said chains, the weight being provided with a central space for the passage of the lamp rod and chains in the telescoping movement of the lamp-rod, substantially as specified.

2. In a telescoping lamp the combination of a tubular socket or post, a cap fitting and secured to the upper end of the socket, and provided with a central bearing, a pair of pulleys pivoted in said cap upon opposite sides of the bearing, the cap forming guards or housings over the said pulleys to confine running connections or cords thereon, alamprod fitting the bearing, flexible connections attached to the lamp-rod and passing over the pulleys in opposite directions, a counterweight attached to the chains and adapted to travel within the socket, and means for securing the lamp-rod at any required height, substantially as and for the purpose specified.

3. In a telescoping or adjustable streetlamp post, the combination of a hollow base or tubular socket provided with a bearing at its upper end, a lamp rod or support fitting said bearing and adapted to be telescoped within the base, a pair of pulleys pivoted within the base on opposite sides of the lamprod, supporting-lines secured to the lamprod and passed over the said pulleys, and an annular counterweight attached to the lower end of the chains and adapted to travel within the base to lift or balance the lamp and lamp-rod, the latter passing through the said ring or annular weight in the movement of the parts, substantially in the manner and for the purpose specified.

JAMES ACTON MILLER.

Witnesses:

LINUs BARNES, GEORGE L. BARNES.

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