US473956A - Electric-arc lamp - Google Patents

Description

(No Model.) 3 SheetsSheet 1.

0. PPLUGER. ELECTRIC ARC LAMP.

No. 473,95 Patented May 3, 1892.

(No Model.) 3 SheetsSheet '2.

C. A. PFLUGER.

ELEGTRIG ARC LAMP.

No. 473,956. Patented May 3, 1892.

j I v y I E5 (1 Y L a l 2 E i E i 1 1 3 0 E I B 1 j I [Hi lbw Z If 1 7 1 uh ki 3 L 3 f u l H H I 17 1 M')we,5: 1;we/do]*:

was Q Z? W,

MM MM N J Jjagw (No Model.) a Sheets-Sheet -3.

0. A. PFLUGER.

ELEOTRIG ARC LAMP.

No. 473,956. Patented May 3, 1892.

UNITED STATES PATENT OFFICE.

CHARLES A. PFLUGER, OF CHICAGO, ILLINOIS, ASSIGl -OR, BY DIRECT AND MESNE ASSIGNMENTS, TO THE STANDARD ELECTRIC COMPANY, OF

ILLINOIS.

ELECTRIC-ARC LAM P.

S'PECIFICATION forming part of Letters Patent No. 473,956, dated May 3, 1892.

Application filed November 13, 1890- Serial No- 371,294. (No model.)

To all whom it may concern.-

Be it known that I, CHARLES A. PFLUGER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Are Lamps, of which the following is a full, clear, and exact specification. My invention relates to are lamps, and has for its object to provide a cheap and simple 1o lamp, and particularly to provide convenient means for conducting the current to the upper carbon and for cutting out the lamp.

My invention is illustrated in the accompanying drawings, wherein Figure 1 is a side view ofthe lamp, the same being momentarily cut out. Fig. 2 is a rear view of the lamp, showing more fully the circuits. Fig. 3 is a detail view of the mechanism of the lamp, the same beingin operation.

Fig. 4 is a detail of the device for conveying the current to the upper-carbon rod.

Like parts are indicated bythe same letters in all the figures.

I haveillustrated only the regulating mechanism of the lamp, as the remaining portions are so well known as not to require full illustrations.

A is a main conductor, leading to the contact B, and thence by the conductor B through 0 the resistance B to the screw 13 When the circuit is closed by the operation of the cutout, the current passes through such cut-out mechanism and by the conductor B to the c011- ductor B thence to the binding-post Bflthence to the Wire 13 From the contact or binding post B a shunt-conductor B leads to the coils 15 B of the shunt-magnet and thence to the conductor B From the same binding-post B leads the conductor C to the main-circuit magnet C and thence to the frame at C This frame is insulated above and below at C and C but from one part of itleads the conductor C to the support D, which is U-shaped in cross-section, as shown in Fig. 4:, and has the operating spring-arms D D to bear on the upper-carbon rod D and has the transverse screw-bolt D, by means of which its sides may be brought together to bring the springarms D D nearer together. The whole of this device shown in Fig. 4 is pivoted to a vertical pivot D, which is journaled in the arms D D which are secured to the link or hanger D The hanger D is pivoted to the lever E, at the outer end of which is secured the plunger E and the dash-pot E and the counteracting spring E and the cores E and the shunt-magnets B B It is understood of course that the lever E is bifurcated so as to carry both of the cores E E. This lever E, or the ends thereof, are pivoted at the rear of the lamp at E E to the fixed frame E IVith the shunt-magnets operating it is evident that the leverE is raised and lowered, and with it the link D but since the device shown in Fig. at for the purpose of conveying the current from the frame, and hence from conductor C to the carbon-rod, is supported upon the link D it will rise and fall with such lever E, and hence responsive to the changes in the strength of the shunt-magnets. This link or hangerD carries at itslower end the clutch-rod F, which is enlarged at F to encircle the carbon-rod, and is upwardlyheld at one end by the spring F and adjustably supported at the other by the stop F G is the armature of the main-circuit magnet C, pivoted at G and connected by the rod G with the stop F. This latter is pivoted on the standard F' and has the link F pivoted to the link F, which carries the dog F provided with the tail F and the spring F". The link F is pivoted concentric with the circuit-closing piece F adapted to engage the contact H, from which leads the conductor l3 and which is insulated from the binding-post B except when such contact is made.

.I is the arm from the lever E, having the pin J adapted to engage the tail F on dog F.

If the parts are in the position shown in Fig. 3, the arc will be in process of burning, and if it have such aresistance or an impediment in the feed as to shunt an abnormallylarge current into the shunt-magnet theywill become abnormally strong and will so far overcome the spring E as to bear down the lever E and force down the arm J until its pin will sufficiently engage the tail F to trip the dog F from its engagement with the enlarged upper end of the pivoted circuit-clos- I00 ing piece F The spring F now pulls down the pin F and thus the lower end of the circult-closer comes against the contact-plate H and short-circuits the lamp or cuts out the shunt mechanism. If the parts are now in such condition that they cannot work, the current will continue to flow through such short circuit, including the resistance B and the parts will remain substantially in the position indicated in Fig. 1. If, as is usually the case upon such short circuit being made, the parts resume their normal position, the carbons falling into contact, the stop F will move on its pivot from the position shown in Fig. 3 to that shown in Fig. 1 and the dog will re-engage its notch. A certain portion of the current will be shunted through the main-circuit magnet C and immediately it will lift its armature G, and thus lift the stop F into the position shown in Fig. 3, and thus raise such dogand move the circuit-making piece F away from the contact-plate II, and the lamp will resume its operation. As the main-circuit magnet thus lifts its armature, it lifts with it the link K, carrying the clutch Ii, whereby the upper-carbon rod D is lifted to establish the arc.

I do not herein desire to dwell upon the operation of the main-circuit magnet and sh u ntmagnets, except so far as may be necessary to an understanding of the operation of the device shown in Fig. 4, and the cut-out, as I have sufficiently shown and described these portions in my patent application, Serial No. 358,983.

The use and operation of my invention, so far as the same relates to the cut-out and the conveyance of the current to the upper carbon, is as follows: The main-circuit magnet being energized by an introduction of the current into the lamp, bears up its armature and at the same time tilts the stop F into the position shown in Fig. 3. The clutch L simultaneously engages the upper-carbonrod, lifts the same, and establishes the arc. By so doing it comes into a horizontalposition, where it loses its grip on the carbon-rod and hence its control upon the same. Simultaneously with this action, however, occurs the operation of the shunt-magnet, which controls its clutch, to feed the carbon in the usual manner. As before described, if the current becomes abnormally strong in the shunt-magnet the dog F is tripped from its engagement with the enlarged upper portion of the circuit-making piece F and the latter is thrown in contact with the plate H. Thereupon the current passes from the conductor A through the resistance-coil, thence through the plate H to the conductor 13, and thence to the line-conductor B and the carbons of the lamp will come together and the parts will assume the position indicated in Fig. 1. Immediately the current will pass through the main-circuit magnet again, and it will lift its armature and bring the parts into the position shown in Fig. 3, thus breaking the cut ou t, and the lamp will resume its operation. In the process of feeding the device for conducting the current from the fixed frame to the upper-carbon rod will move with the feed clutch, as it is connected directly thereto, both being swung upon the same link or hanger, from the lever which is controlled by the sh nut-magnets. Thus a sliding contact with such carbon-rod is made, and since the contacting-arms D and D move up and down with the rod an exceedingly-delicate feed is possible. Moreover, by pivoting these arms to the same i ertical pivot they will always bear with equal force upon the opposite sides of the carbon-rod, and the same tension may be given by turning the transverse screw D.

It is quite evident that great changes could be made in the construction and arrangement of this device without materially departing from the spirit of my invention, and I do not wish to be limited in the application of such cut-out and cu rrent-carrying devices, asI expect to apply both in lamps of greatly-different form from that herein shown.

I claim 1. In an arc lamp, a current-carrying device consisting of fingers to engage the carbon-rod on opposite sides and means whereby they may be adjustably brought together, and a vertical pivot on which such device is supported, so that the fingers bear with equal pressure 011 opposite sides of the carbon-rod.

2. In an arc lamp, the combination of the feeding magnet or solenoid with a currentcarrying device independent of such feeding magnet or solenoid and adapted to lead the current from a fixed portion to the upper-carbon rod, said device consisting of arms clasping the rod on both sides, movably responsive to variations in the. strength of the feeding magnet or solenoid.

3. In an arc lamp, the combination of the feeding magnet or solenoid with a feedingclutch operated thereby and a separate current-carryin g device distinct from such clutch and adapted to lead the current to the uppercarbon rod, said device supported so as to be always equidistant from and to travel with the feeding-clutch.

CHARLES A. PFLUGER. lVitnesses:

CELESTE P. CHAPMAN, HARRIET M. DAY.

Images