US325423A

US325423A - Normal mccarty

Info

Publication number: US325423A
Authority: US
Publication date: 1885-09-01
Anticipated expiration: 1902-09-01

Description

(No Model.)

N. MGOARTY.

ELECTRIC ARC LAMP.

No 325,428. Patented Sept. 1, 1885.

I I flif w I M M flea/w N. FUER'S. Photo-Uhographer, Waihlngfon. n. c.

UNITED STATES PATENT OFFICE.

NORMAN MCCARTY, OF HOOSIGK, NEWV YORK, ASSIGNOR TO JOHN B. TIBBITS, OF SAME PLACE.

ELECTRIC-ARC LAMP.

SPECIFICATION forming part of Letters Patent No. 325,423, dated September 1,1885.

Application filed June 1, 1885.

T aZZ whmn it ntay concern:

Be it known that I, NORMAN MOOARTY, of

V Hoosick, in the county of Rensselzfr and State of New York, have invented a new Improvement in Electric-Arc Lamps; and I do hereby declare the following, when taken in con nection with accompanying drawings, and the letters of reference marked thereon, to be a full, clear, and exact description of the same, to and which said drawings constitute part of this specification, and represent, in Figure 1, aside View of the principal magnet, carbon-holders, the shuntrmagnet, and its mechanism; Fig. 2, an enlarged side view ofthe armature and contacts of the shunt-magnet,

showing the armature in the position of permitting one contact to close before the other is opened; Fig. 3, top View of the armaturearms, showing the connection with the respect- 2o ive contact-spindles.

This invention relates to an improvement in electricarc lamps in which a shunt-magnet is employed arranged to break the circuit through one line after it is completed through another, and is an improvement upon the invention for which. Letters Patent of the United States No. 305,096 were granted to me September 16, 1884. In that invention movable contacts were provided for making and breaking the circuit through the shunt, the contacts following the armaturelever to such an extent that a contact was made at one point before it was broken at the other. While that device accomplishes the object of the invention, it

3 5 makes the shunting apparatus somewhat complex.

The object of my present invention is to simplify the shunt mechanism; and it consists in the construction, as hereinafter described, and

more particularly recited in the claims.

For convenience of illustration, I show the principal magnet, the shunt, and the carbons detached from the usual lamp mechanism, and not in their usual relation to each other.

A represents the principal magnet; B, the shunt magnet, O, the uppercarbon holder, and D the lower-carbon holder; at, the armature of the principal magnet, and b the armature of the shunt-magnet, hinged to produce a vibratory movement in the breaking and closing of (S0 model the circuit, substantially the same as in my previous patent.

To the armature b of the sh tint-magnet a bar forming two arms, 0 d, is rigidly attached, the one extending in one direction from the arlnature and in the plane of vibration of the armature, and the other in the opposite direction, as seen in Fig. 3, and so that as the armature turns in its opening and closing movement the bar cd turns accordinglysay, as from the position seen in Fig. 1, open, to that seen in broken lines, same figure, closed, and return.

E is one fixed contact block or point for the shunt, and F the other block or contact. Over the block E is a vertical spindle, G, carrying a contact, H, and over the block F is a like spindle, I, carrying alike contact, J. The spindles both extend upward through a supporting-bar, K, and so that they are held in line with their respective contact-blocks, but so that they may be moved up or down to make or break the contact.

The spindle G is constructed with a vertical slot, e, through which a pin, f, in the arm 0 extends, and the other spindle, I, is constructed with a like vertical slot, 9, through which a pin, h, in the lever extends, as seen in Figs. 3 and 4. These slots are in such re lation to each other and to the respective studs that at an intermediate point in the movement of the armature both contacts H J may rest upon their respective contacts E F, as seen in Fig. 2, but when the armature is in the open position, as seen in Fig. 1., then the contact H is free to rest upon its contact E, but the other contact, J, will be raised from its contact, as seen in that same figure. On the contrary,when the armature is fully closed, as indicated in broken lines, Fig. 1, then the condition is reversed, and the contact J will rest upon its contact F, while the contact H will be raised frornits contact E. The contacts H and J fall by their own gravity, and are simply lifted or raised by the turning of the armature. The incoming line L is in connection with or attached to both the spindles I G, as indicated in Fig. 1, and the same line also connects with one end of the coil of the shunt-magnet. From the contact F of the shunt apparatus a line, t, leads to the uppercarbon holder, and from one end of the coil of the principal magnet A a line, Z, also extends to the same upper-carbon holder. From the other contact, E, a line, m, extends to the other end of the principal magnet-coil. From the lower-carbon holder a line, M, leads to the next lamp, and from the other end ofthe shuntcoil 21 line, a, leads to the same lower-carbon holder. This arrangement of linesis substantially the same as that in my previous patent.

The shunt-armature being open, contact is made between H and E, and the circuit is through the principal magnet, and the carbons burn in the usual manner. As the carbons are consumed and the I are thereby increases, a portion of the current will be shunted through the wire a, that current gradually increasing as the are increases until the current shunted be strong enough to overcome the springN of the shunt-armature. Then that armature will be drawn toward its pole, and as it approaches its pole, as seen in Fig. 2, the contact J will be brought upon its block F, as seen in that figure, and make contact therewith before the p111 f has reached the upper end of the slot 6 in the spindle G of the other contact, H. Then asthe current through the sh unt still increases to draw the armature to its closed position, (indicatedin broken 1incs,FigS. l and 2,) the other contact, II, will be raised from its block to break the contact between H and E. In this condition the current is shunted from the principal magnet A, breaking the circuit through that magnet, the feeding of the carbons takes place in the usual manner, the are is restored. Then the shunt-magnet loses its power in the usual manner, the armature opens, and in such movement permits the contact H to drop and make engagement with the contact E before the contact J shall be raised from its contact F; and then in the final opening movement of the shunt-armature the contact J will be raised to break its conncction from its contact E, and so will continue to act. As the carbons are consumed and the are increases,theshunt-armature will be brought into action to operate its contacts H J; but in all cases the contacts at one side are brought together before the other contacts are broken. Therefore the circuit through the main line cannot be broken before it is completed through the shunt, or vice versa; but the main current may be gradually broken before the feeding of the carbon takes place, as in my previous patent.

I have represented the contacts II E and J 1? as presenting flat faces, and this I prefer; but the shape of those contacis is immaterial to my invention. The contacts thus arranged require no spring to cause them to follow the movement of the armature, the downward or closing moyement being made entirely by gravity and the opening movement by the movement of the armature directly.

I have not illustrated the feeding mechanism for the carbons or any particular arrangement of the principal and shunt magnets, as such constitutes no part of my invention and is immaterial to it.

I have represented the slots for the loose connection between the arms and the respect ive contacts H J as made in the spindles carrying the contacts, with the pin in the arm; but this order may be reversed, it only being essential that there shall be such a loose coir nection between the two contacts and the respective arms that sufficient play will be allowed between the arms and the contacts that one contact may rest upon its block before the other contact shall have been lifted from its block.

I claim 1. The combination of the principal magnet and .the shunt-magnet, the armature of the shunt-magnet hinged to produce a vibratory movement in breaking and closing the main circuit, two arms extending from said armature in the direction of the plane of movement of the armature, one in onedirection and the other in the opposite direction, and so as to oscillate under the vibratory movement of the armature, two stationary blocks, one in connection with the principal magnetand the other with the main-line shunt, and a corresponding contact for each of said blocks arranged upon vertical spindles and iree to move up and down toward the respective blocks, the said movable contacts in loose connection with the respective arms extending from the armature, the said two movable contacts in connection with the main line, substantially as described, and whereby under the movement of the armature one of said contacts will be brought upon its block before the other c011- tact shall be lifted from its block.

2. The combination of the principal magnet and the shunt-magnet, fixed contact-blocks E F at the shunt, the shunt-armature b, hinged to receive a vibratory movement in opening and closing, arms 0 (1, extending from said armature in the plane of its vibratory move ment, and so as to partake of the movement of the armature, and contacts H and J on vertical spindles G I, and corresponding to the respective blocks E F, the said arms extending from the magnet in connection with the said spindles, respectively, by a slot in one and corresponding pin in the other, substantially as described,and whereby under the vibratory movement of the armature one of said contacts is permitted to fall upon and engage its block before the other contact shall be raised from its block, substantially 'as described.

NORMAN MCCARTY.

\Vitnesses:

H. O. BABCOCK, NonLn Iunmrrs.