US594426A

US594426A - Henry r

Info

Publication number: US594426A
Authority: US
Publication date: 1897-11-30
Anticipated expiration: 1914-11-30

Description

(No Model.)

H. R. QUINBY. ELECTRIC ARC LAMP.

M t n e v n I Patented Nov. 80,1897.

Witnesses.

Attorney;

NiTnn STATES Parent @rrrcn.

HENRY R. QUINBY, OF ROCHESTER, NEW YORK.

ELECTFHG ARG LAW P.

SPECIFICATION forming part of Letters Patent No. 594,426, dated November 30, 1897.

Application filed February 18, 1897. Serial No. GZ LOZQ, (N model.)

To (Mi-whom, it may concern:

Be it known that I, HENRY R. QUINBY, of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Electric-Arc Lamps; and I do hereby declare the following to boa full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, and to the reference-numcrals marked thereon.

ln'ypresent invention relates to electric-arc lamps, and has for its object to improve the construction and operation of the devices for controlling the feed of the upper carbon; and it consists in certain improvements hereinafter fully described and the novel features pointed out in the claims at the end of this specification.

In the drawings, Figure 1 is a vertical sectional view of a lamp constructed in accordance with my invention; Fig. 2, a detail sectional View of the carbon-clamp and feeding device; Fig. 3, a cross-sectional view of the same on the line a: 00 of Fig. 2; Fig. 4, a sectional view on the line y 1 of Fig. 2.

Similar reference-numerals indicate simi lar parts.

The frame and operating portion of the lamp, with the exception of the clutch devices, may be of any suitable construction; but in the present embodiment lhave adapted my invention to a form of lamp in which the magnet-body (indicated by 1) has the upper and lower annular portions connected by two or more vertical portions, being substantially cylindrical, with more or less open walls.

2 indicates a core-piece attached to the end of the magnet connected to a tube 3, operating to suspend the lamp, and within the tube 8 is an interior tube 4, forming a guide for the carbon-holder.

indicates the carbon-holder, sliding within the tube a and connected at its upper end to the upper end of said tube 4 by a conductor 6, preferably in the form of a light wire wound into a 'coil and serving to place the carbon-holder in electrical connection with the portion of the frame carrying the positive current. The upper end of the holder 5 is provided with a groove 7, cooperating with a rib or spline 8, secured to the tube 4t and preventing the turning of the holder in said tube as it moves vertically, thereby preventing unwinding of the conducting-coil 6 or its displacement or disarrangement when the carbon is attached to the holder. The lower end of the holder 5 is provided with suitable spring clamping-jaws 9, into which the upper carbon 10 is inserted and held by friction.

11 indicates the solenoid or coil in connection with the magnet and wound about the interior brass lining or

tube

12, and 13 the armature encircling and slidin upon the tube l, having its upper end recessed to receive the pole-piece 2, said armature being freely movable downward by gravity and upwardly by the current in the solenoid.

The carbon-clamp carried by the armature embodies a movable collar 14, encircling the carbon or the carbon-holder, preferably tapering exteriorly and movable within the chamber 15, formed in the lower end of the armature, the outer walls of said chamber tapering downwardly toward the center and the collar being provided with three or more radially-extending apertures or recesses in which are located bearing-balls 16, the construction being such that when the collar is at the lower portion of the tapered recesses in the armature and the latter is raised slightly the balls engaging the carbon or carbon-holder and said tapering walls will hold the carbon and permit it to be raised with the armature to form the arc, and when the armature is lowered by the burning away of the carbon until the lower end of the collar 14 engages the lower portion 1. of the frame said collar will be moved upward and the carbon, being re leased from the clamp, will fall until again grasped and held by the balls as the armature moves upward by the increased strength of the magnet. When the current is reestablished by the contacting of the carbon, the armature will be raised and the balls in the clamp operated upon by the inclined walls and held against the carbon-holder or carbon, raising the latter to reestablish the arc.

The collar is heavy enough to compel the positive movement of the balls in the nar rower portion of the armature, so as to insure the positive clamping and releasing, and in the present embodiment the lower end of the armature in which the tapering chamber is formed is made separate from the upper portion, the two being connected by screwthreads, as shown in Fig. 2. Attached to the lower end of the armature is plate 25, which limits the upward movement of the armature in the solenoid by engaging the tubular lining 12 of the magnet. in order to prevent the balls from falling out of the clamping collar when the carbon or carbon-holder is removed, the inner ends of the apertures in which the balls operate are slightly reduced in diameter, as shown in Fig. This form of carbon-clamp is positive in its operation and insures the proper grasp on the carbon, providing for the feeding of the latter, and the balls being free to turn when released very little friction is offered, so that the carbon maybe fed in just a sufficient amount to secure the best results. Furthermore, by eniploying the balls, as shown, between the rmature and carbon, the latter beingpre v iited from rotation and the armature tree to turn, there is no liability of the parts sticking or becoming inoperative by reason of any relative movement. The collar carryingthe balls free to turn independently of the armature.

The employment of the conductor 0 at the upper end of the carbon-holder provides for the direct connection with the latter in the circuit, thereby preventing the spar-kin g and burning which is liable to take place it wiping contacts are employed. While the springs at the end of the carbon-holder for grasping the carbon may be formed directly thereon, I prefer to employ a removable tip for the carbon-holding. rod, on which the graspingsprings are located, as shown more particularly in l. The other portions of the frame of the lamp and the devices for holding the lower carbon may be of any suitable construction, and l have shown the lower frame connected by tubular rods 21 with the lower portion of the magnet-frame, the conductor leading to the lower carbon passing through one of said rods, and l have also shown a lamp of the type employing a small globe 22, in which the arc is formed; but it will be understood thata largerinclosing outside globe is also employed, attached to the frame in any suitable manner.

I claim as my invention 1. In an eleetric-arc lamp, the combination with the movable armature having the tapering recess, of the carbon-clamp embodying the collar through which the carbon passes, movable in said recess, having the radial apertures, and the balls arranged in said apertures and engaging the walls of the tapering recess and also the carbon, and a releasing projection cooperating with the clamp-collar, substantially as described.

2. lnan arc-lamp, the combination with the movable armature, having the tapering recess, of the collar through which the carbon passes vertically movable in said recess and having the radial apertures, the balls in the apertures engaging the sides of the tapering recess and the carbon, a movable carbonhelder, and guides for preventing its rotation, and an extensible eurrent-conductorattached to the carbon-holder, substantially as described.

S. in an arc-lamp, the combination with the tubular arm ature having the removable lower end provided with a tapering recess, of the collar operating in said recess, having the radial apertures, and balls in the apertures cooperating with the walls of said recess to clamp the carbon passing through the armature, substantially as described.

HENRY it. QUlNllY. Witnesses:

1 l Cnunen',

A. Rona.