US318350A - Arc lamp - Google Patents

Description

(No Model.) 2 SheetsSheet 1.

W. F. BUCKLEY.

ARC LAMP.

No. 318,350. Patented May 19, 1885.

WITNESSES IIVI/E/VTOH MW AT fi/VEYS UNITED STATES \VILLIAM F. BUCKLEY,

PATENT OFFICE.

OF CLEVELAND, OHIO.

ARC LAMP.

SPECIFICATION forming part of Letters Patent No. 318,350, dated May 19, 1885.

Application filed June 28, 1894.

To aZZ whom it may concern.-

Be it known that 1, WILLIAM F. BUCKLEY, a citizen of the United States, residing at Cleveland, in the county of Ouyahoga and State of Ohio, have invented certain new and useful Improvements in Are Lamps; and I do hereby declare that the following is a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the name, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

Figure 1 of the drawings is a front view of my device. Fig. 2 is a side view of the same. Fig. 3 is a vertical cross-section, and Figs. 4 and 5 are detail views.

This invention relates to electric-arc lamps; and its object is to provide means for bringing the upper carbon down as both carbons are burned away, so as to keep the resistance as small as desirable between the points of said. carbons.

The invention consists in the construction and novel arrangement of devices, as will be hereinafter more fully set forth, and particularly pointed out in the claims.

In the accompanying drawings, A represents the frame ofan electric-arc lamp, of ordinary construction, having properly attached thereto the upper and lower vertical carbon pencils, cm, respectively. The lower carbon pencil, a, is adjustably secured within a ring, a-, fixed to the lowest point of the frame A, and having properly attached to it the negative wire a, which is secured to the binding-post a" at the top of the frame of the lamp.

a is a similar binding-post for the positive wire a, situated on the top of the frame of. the lamp diametrically opposite a".

B is the main coil of the lamp, made of coarse insulated wire, having the positive wire a connected with it and electrically connected to the upper carbon, a, by means of the insulated wire I). The coil B is preferably made a solenoid coil.

0 is a horizontal lever, pivoted near its cen- (Xo model.)

tral portion to the inner surface of the top plate of the frame of the lamp at c; and c is the iron core of the coil B, pivoted to and hanging from the outer end of the lever (l. The other end of said lever has pivoted to and depending from it the piston-rod c" of the dash-pot c, which stands vertically within the upper portion of the frame of the lamp, and is pivoted at its lower end within said frame at the point 0 so as to accommodate its movement to that of the lever C. The dash-pot 0* is filled with glycerine, against which the piston 0 (having a proper opening through it) acts, and its purpose is to prevent too sudden movement of the lever O when the core 0 is moved by the current passing through the coil B.

0 0 are similar vertical links, having their upper ends pivoted to the lever C at equal distances on each side of the upper carbon, which passes through said lever by a proper opening between said links. The lower ends of the links 0 are pivoted to the upward and outward extending arms of the gripping device 1). The said device is composed of the upper similar arms, (I (I, each pivoted by its upper end to one of the links c and the lower similar arms, d d. The upper arms, (I, have on their inner surfaces, near their lower ends, the clutches (7? (1*, which are made on the section of a circle and stand concentrically around the carbon a. The lower arms, d d, are connected near their upper ends by a joint composed of the two half-rings d (1, one of which runs inward from each arm, at right angles to the same, concentrically around the upper carbon. The half rings are properly pivoted together 011 each side by their meeting ends. Thus when the upper arms, (I (Z, are depressed they will open apart and release the carbon from the clutches (1, so that it can drop on the lower carbon. and when said arms are lifted by the links c 0 they will cause said clutches to engage and lift the carbon.

E E are two similar and equal vertical coils of fine insulated wire (preferably made solenoids) situated at equal distances on each side of the upper carbon, and having their bases properly secured to a horizontal plate, 6, fixed within the upper part of the frame of the lamp.

c is a proper central opening in the plate 6, through which opening the gripping mechanism passes.

E is a horizontal bar attached at right an gles across the lever G, with its arms extending over the coils E E, the bar thus forming an armature to said coils.

G G are brackets depending from the plate 0, and having their lower ends bent horizontally inward, for a purpose hereinafter mentioned.

H is a wide baror plate, the ends of which rest upon thcinward-turned ends of thebrackets G. The plate H rests below the coils E E, and has secured to it by their lower ends the vertical soft-iron cores h h of the said coils.

h h are similar and equal upright extensions from the upper surface of the plate H at equal distances on each side of the upper carbon and of the gripping mechanism D. The inner surface, 7L2, of each extension It runs downward and inward from the top of the same, so that whenthe cores I: It and attached plate H are drawn up by the coils E E the said inclined faces will drive together the de pending arms d d of the gripping device and release the clutches d from the upper carbon, allowing the same to descend upon the lower carbon.

I is a vertical coil, fixed by its lowerend to a horizontal bracket, 1 which is secured to the side of the frame of the lamp at; a point diametrically opposite the coil B.

l. is a bar of soft iron, fixed within and acting as a core to the coil 1, and magnetized by the same when necessary.

J J J J are four shunting-wires, the first connecting the positive wire a of the lamp from a point between the coil B and binding post a? to the coil I, the second connecting the coil I to the proper one of the coils E, the third connecting the coils E E together, and the fourth connecting the coil E (not joined to l) to the wire I) at a point between the coil B and the brush 7)". Thus both coils E and the coil I are in the shunting-circuit.

K is a horizontal lever-,pivoted by'its outer end'to the side of the frame A, near its top, above the coil I; and k is atriangular block of copper fixed to the inner end and depending from said lever.

K is a depending arm from the under surface of the lever K, near its outer end, which arm rests upon and is held up by the vertical arm lot the rock-bar L, the horizontal arm Z of which stands over and a little above the upper end of the core '5. The said rock-bar is pivoted by its corner to a bracket, Z standing inward from the side of the frame A, and has its vertical arm kept in position under the arm 76 by the horizontal spring 7", which has one end secured to the arm Z and the other to the frame A.

M M are insulated wires, respectively connected to the positive and negative wires of the lamp, just within the binding-posts of the same.

N N are similar copper terminals standing vertically and fixed by proper insulators within the frame of the lamp below the copper block k, the inclined surfaces of which stand vertically over the similarly-inclined upper surfaces of said terminals. The wires M M have their inner ends in connection with the terminals N, respectively, thus forming a short circuit when the block 70 is brought into contact with the terminals by means of the coil 1 and the core 2', drawing the vertical arm of the rock-bar inward and allowing the inner end of the lever K to drop.

0 is a vertical coiled spring, having its upper end fixed to the lever K at a point a short distance to the outer side of the block itand its end to a proper bracket on the-frame A. The said spring is strong, extended where the lever K is held up,aud holds the block 7; down when the short circuit is closed.

The operation of the lamp is as follows: The carbons being in contact, when the cur rent passes from the positive wire a through the coil 13, and thence by means of the wire Z) and brush If through the two carbons, and up the negative wire a ,the coil 13 draws down the core 0, raising the inner end of the lever C, and consequently the links 0 This causes the clutches d (l to grip and raise the upper carbon and establish the arc. hen the carbons separate too far, more than a normal quantity of the current will pass through theshunting-circuit as the resistance through the carbons will be increased. The coils E E will then act with more force, draw higher up the cores h h and attached plate 11, and by means of the extensions h h separate the upper carbon, as described, from the gripping device and allow it*to drop. The drawing down of the armature F will also assist in this action. After the carbons touch, the main current will be again fully established, (as the resistance is decreased,) and will draw the carbons away, as before, and establish the are. \Vhen the carbons are separated very far apart-for instance, by the end of one being broken oft' a much stronger current will be shunted through the wires J J J J, and will cause the core 2 of the coil I to draw down the arm Z and release the arm 7.: from the arm Z, thus allowing the block 7.: to drop and close the short circuit, which is held closed by the spring 0. The closing of the short circuit of course extinguishes the lamp, which will stay so until seen and properly fixed.

hat I claim, and desire to secure by Let-,- ters Patent, is-

1. The combination, with the main wires,

the arc-establishing magnet B, and the shuntwires, of the magnets E, the armature, the horizontal bar 0, carrying the carbon-gripping device, the iron cores of the said magnets E, and the lower horizontal bar, H, carrying In testimony whereof I afiix my signature in 10 the vertically-arranged inner beveled projeopresence of two witnesses. tions, k substantially as specified.

2. The combination, with the main wires, "WM. F. BUOKLEY. 5 the shunt-wires, and short-circuit wires, of

the coil I, having the core I, the pivoted bar Witnesses: K, carrying the copper block k, the terminals L. A. RUssELL,

N N the rook-bar L, and the spring O,substan- \VM. L. R1012. tially as specified.

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