US920331A - Arc-lamp. - Google Patents

Description

G. G. HUGHES.

ARC LAMP.

APPLICATION FILED 13.13, 1905.

Patented May 4, 1909.

ll 20 "It 69 ml v 29 Grim-mar! UNITED STATES PATENT ()I FIOlF.

(QZHA HLES (J. H UUHES, F ll-llLADlliLPlUA, PENNSYLVAN IA ABC-LAMP.

To all whom it may concern:

Be it known that l, CHARLES C. HUGHES, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia, State of Pennsylvania, have invented certain new and useful llnprovenicl'lts in Are- Lamps; and I do hereby 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 appcrtains to make and use the same.

This invention relates to are lamps of the hot wire type and has for its object to provide a cheap and simple means for cooperation with the hot wire for raising and lowering the carbon and for engaging and releasing the carbon.

In the accompanying drawings: Figure 1 is a view in elevation of the lamp. and, Fig. 2 is a similar view, but taken in a vertical plane at right angles to the plane of Fig. 1. ig. 3 is a detail sectional view showing the manner of electrically connecting the hot wire with the flexible conductor.

Referring more specifically to the drawings, the numerals 5 and 6 denote upper and lower plates, respectively, which are held in fixed spaced relation by means of standards 7, there bein" connected with the upper )late 5 the usual ranger 8 by means of WhlCl the lamp may be suspended, and with the lower plate 6, the usual globe supporting device 9.

Extending downwardly from the lower plate 6 is the usual arm 10 which carries at its lower end the usual collar 11 for the reception of the lower end of the lower carbon of the lamp.

Secured to the under side of the 11 per plate 5 is a plate '12 to which is scour the upper-ends of depending uide rods 13, the said rods being connected at their lower 2 ends to brackets 14 which extend inwardly i from the standards 7 and overlap at their meeting ends. A socket 15 is arranged for the reception of the upper end of the upper 1 carbon 10 of the lamp. the said carbon heiiw i held in pluceby means of a set-screw 1i whichserves' also as ameans for fastenin the wine 45, as will be presently explainedi Extending from diametrically opposite i points upon the collar '15 are tongues 18 which are provided with apertures through I which extend the rods 13, it being. under- I stood that the said rods serve to his the movement of the upper carbon an that the said carbon extends through an opening Specification of Letters Patent.

Application flled April 13, 1906.

Patented May 4, 1909.

Serial No. 311.608.

formed in the brackets l-l; to further guide the same.

Mounted upon the upper face of the upper plate 5 is a binding post 19 having a depend- 'ing arm 20 to which is connected an un le bracket 21. The angle bracket 21 inclu es a horizontal portion in which is a perforation that loosely receives a threaded stem 60 with the upper end portion of which is engaged a thumb nut 61 which when turned in one direction draws the stem upwardly through the perforation and when turned in the opposite direction, permits the stem to pass downwardly throu h the perforation. Connected with the three ed stem is one end of a conductor wire 22 which extends (1OWI1 wardly as shown in Fig. 1 and around an in sulated roller 23 journaled upon a plate 2% which is secured to the adjacent one of the standards 7 adjacent: its lower end and forms a convenient means for securing the roller 23 to the standard. The wire 22 then extends inwardly and over a. similar roller 25 which is journaled in a bearing bracket 26 secured to the under side of the top plate 5 and over a third roller 27 journaled in a. bearing bracket 28 which is also secured to the under side of the said plate. After passing over the roller 27, the wire extends downwardly and around an insulated roller 29 and thence upwardly and is connected to an insulated pin 29 carried by a. bracket which is connected to the top plate 5. The roller 29 is 'ournaled in a yoke 30 which is pivotally connected to one end of an arm 31 which is pivotally mounted upon a plate 32 which is secured to the adjacent one of the standards 7, the said connection between the yoke-bearing and the pivoted arm being made adjustable by providing the arm with a series of openings 3., through which may be interchangeably eui ,Q aged the pivot pin which connects the menr hers. The plate 32 is provided with abracket arm 3-! to which is secured the lower end of a ilate 33. the upper end of which is bent aterally at right angles provided with an aperture through which is loosely engaged a threaded stem 36 upon which is engaged an adjusting nut 37 which latter bears against the said portion of the plate 3.7. helical spring 38 is connected at one of its ends to the lower end of the stem 36 and is arranged for the engagement of its other end with one of a series of openings 39 formed through the said arm.

Slidably disposed upon the 11 per carbon to of the lamp is a sleeve 40 which is provided adjacent its lower end and u on 0p 0- site sides with pairs of s accd fiiigers the respective tween which are receive guide rods 13 to prevent turning of the sleeve upon the carbon 16. The sleeve is also provided with a pair of spaced aper tured ears between which is pivoted one end of an arm 41, the point of pivotal connection of the said arm with the sleeve being adja cent what may be termed the lower longi tudinal edge of the arm for a purpose to be hereinafter described. The arm 41 rests against the end of the pivoted arm 31, the said end of the arm 31 bein preferably reduced to form a stem 42 and t ie end of the arm 41 is preferably weighted as at 43 to normally hold it against the stem 42. The sleeve 40 is provided at a point in alinement \vith tlie upper end of the arm 41 with a slot 44 through which the said upper end of the .arm may project to contact with the upper carbon 16, it being understood that the end of the arm contacts frictionally with the said carbon when the arm is raised by reason of the location of the pivot point of the arm adjacent the lower longitudinal edge thereof, and it will also be understood that when the arm is lowered, its'upper end will be moved out of engagement with the upper carbon 16 thereby permitting downward movement of the said carbon.

Connected to the binding post 17 is one end of a conductor wire 45 which wire is connected at its opposite end to the bindi-n post 29'. The arm 10 has its .111PP8I end reduced and screw threaded and engaged through the lower plate 6 and engaged upon the said screw-threaded end of t e arm-1s a nut 47 which to ether therewith furms a binding ost tor t eattachment of one and of a con uctor wire48 which is connected'at its opposite end to ti Binding st 49 carried by he upper plate 5. Lea ing from the binding posts 19 and 49 are the usual wires 50 by means of which the current is con veyed to the lamp.

It will be readil seen from the foregoing that the current 0 electricity passes throu the wire .22 to the wire 45 and through t e same to the upper carbon 16 and that the current is conveyed from the upper car on to the lower carbon, thence through the arm 10 and the wire 48.

When not in use, the upper and lower carbons are in contact with each other but as soon as the electric current asses into the lamp, the wire 22 becomes eated and expansion takes place which results m a lengthening of the wire allowing the sprin r 38 to move the end of the arm 31 to whici it is connected upwardly and cause the upper end of the arm 41 to engage the upper carbon 16 as heretofore stated and lift the said carbon out of contact'with the lower earborn of the lamp. As the upper carbon burns aways and a greater length of are is ob tained, the wire 22 becomes cooled and hence contracts, resulting in a downward move- 1 ment of the end of the pivoted arm 31. to

which the sprin 38 is connected, thereby releasing the en of the arms 41 from engagement with the upper carbon of the lamp and allowing the'said carbon to move down wardly.

It will be noted that the clutch sleeve'is freely movable away from the base of the lamp frame and longitudinally of the car hem and independently of the actuating lever 31. This facilitates the trimming of the lamp as it is only necessary to grasp the sleeve and raisejt to carry the clutch lever away from the actuating lever when the carbon will slide downwardly through the sleeve and into engagement with the fixed carbon. The sleeve is then released and falls by its own wei ht down the movable carbon until' the clutch lever strikes the actuating lever and is swung into engagement with the movable carbon. No adjustment is nec essa ry.

What is claimed is:

In an arc lamp, a supporting frame comprising upper and lower plates, and standards connecting said plates, a binding post on said frame, a lateral plate secured to one of said standards adjacent its lower end, an insulated roller journaled u on the lastmentioned plate, a pair of space rollers suported on said upper plate in substantial y diametrically opposite osition, a second lateral plate secured to t is second standard, an arm pivotally mounted thereon, a yoke hearing pivotally connected to one end of said arm, a second insulated roller journaled in said yoke bearing, a second bindin post connected to the top plate, and a con uctor wire extending from the first mentioned binding post to and around the first mentioned insulated roller, thence around the pair of spaced rollers. thence around the second insulated roller, and thence to the second binding post.

In testimony whereof, I: atlix my signature, in presence of two witnesses.

CHARLES 01; HUGHES. Witnesses:

HANs VVENIGER, ALEX. VVAL'raR.

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