US820414A - Lamp-pendant. - Google Patents

Description

No. 820,414. PATENTED MAY 15, 1906. H. W. HANWELL.

LAMP PENDANT.

APPLICATION FILED D130. 9, 1904.

. UNITED STATES PATENT OFFICE.

LAMP-PENDANT.

Specification of Letters Patent.

Patented May 15, 1966.

Application filed December 9, 1904. Serial No. 236,216.

To all whom it may concern:

Be it known that I, HERBERT WILLIAM HANWELL, a subject of the King of Great Britain, and a resident of Northampton, in the county of Northampton, England, have invented certain Improvements in or Relating to Lamp-Pendants, of which the following is a specification.

This invention relates to a lamp-pendant of the type in which the lamp is supported by a light tackle constituted by the wire or flexible tube or other conduit by which the fuel is conveyed to it and comprising a suspended counterbalance acting to oppose the action of gravity upon the lamp and its holder.

An important feature of the present invention is the employment, in combination with a support fixed to, for instance, a ceiling, of a conduit-guide that is constituted by an open trough, for it is found that in the situations for which such pendants are commonly employed the employment of a closed conduit, such as a pipe, gives rise to difficulties in the working of the pendant in that dirt and sometimes insects clog the tube and prevent the conduit passing freely through it.

A further important feature of the present invention is the employment as a counterbalance in the pendant of a grooved pendantless pulley, that is a sole and integral counterbalance, self-contained, and which obviates the need for any appendage thereto.

In the accompanying drawings, which relate to one construction of pendant according to this invention, Figure 1 is a side elevation of the pendant with a lamp attached to it. Fig. 2 is a vertical central section of a fixed hollow support shown in elevation in Fig. 1, and Fig. 3 is a plan of the grooved counterbalance-pulley seen in Fig. 1 in side elevation. The scale to which Figs. 2 and 8 are drawn is larger than that of Fig. 1.

Like letters refer to like parts throughout the drawings.

In the drawin s a support A, fixable to a ceiling, has the ilIuminating agent led to it for instance, to its interior, if it be hollow, as in the example illustrated. Such agent may be gas, oil, or electricity. In the example illustrated the pendant is constructed to suit a gas-lamp. A grooved pendantless counterbalance-pulley B is situated at a lower level than that of the support A, its object being to balance the weight of the lamp L.

A stationary conduit-guide C is secured to some fixed support conveniently being passed through and fixed in the hollow support A at a higher level than that of the pulley, and its ends C are extended laterally to one side of the vertical center line of the pulley. A flexible conduit D, that is connected with the interior of the hollow support by a tubular branch A from the latter, extends down from it to and around the pulley B and thence up to one end of and along the conduit-guide C, which should, as shown, be a curved trough of metal and down from the other end of the conduit-guide to the lampholder L.

The circular counterbalance-pulley is a sole and integral counterbalance for the lamp and economizes space in that it is pendantless'i. 6., that it avoids the need for any supplemental device that would extend be yond its own circumference, as would an extra weight slung from the pulley center and commonly thus used. It may be made hollow, like a box, so that its weight may be varied by suitably loading it internally; but this variation of internal loading is no part of the present invention.

l/Vhen the lamp is raised or lowered, the conduit D slides throu h the conduit-guide C O endwise and lengt hens or shortens the bight that passes around the counterbalancepulley, lowering the same as the lamp ascends, and vice versa.

The present invention is not limited to the employment in conjunction with the open conduit-guide of a self-contained counterbalance constituted by the pulley aforesaid, for instead of that a pulley of the usual type With counterbalance may be adopted.

The advanta es of the open-trough type of conduit-guide ave been hereinbefore set forth. The advantage of dispensing with pendants or their appenda es on the counterbalance-pulley itself is t at it can come down nearer to the lamp, and therefore the lamp can rise farther in a given amount of head-room, than if a pendant hung from the under side of the pulley.

What I claim as my invention, and desire to secure by Letters Patent of the United States, is

1. In a lamp-pendant, the combination with a hollow fixable support, of a lampholder, a rotatable grooved pulley constituting a counterbalance and arranged at a lower level than that of the said support, the grooved pulley having an open trough for the flexible conduit, a conduit-guide attached to the fiXable support, and a flexible conduit connected to the hollow support and extending down from it to and around the pulley and thence up to one end of and along the conduit-guide and thence down from the other end of the conduit-guide to the lampholder.

2. In a lamp-pendant, the combination with a hollow fiXable support, of a lampholder, a rotatable grooved pulley constituting a counterbalance and arranged at a lower level than that of the said support, the

rooved pulley having an open trough for the fiexible conduit, a conduit-guide constituted by an open curved trough ri idly secured to the fiXable support, and a fiexible conduit connected to the hollow support and extending down from it to and around the pulley and thence up to one end of and along the conduit-guide and thence down from the other end of the conduit-guide to the lampholder.

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

HERBERT WILLIAM HANWELL. Witnesses a H. D. JAMEsoN, A. NUTTING. K .f

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