US664209A - Electric-arc lamp. - Google Patents

Electric-arc lamp. Download PDF

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US664209A
US664209A US65139297A US1897651392A US664209A US 664209 A US664209 A US 664209A US 65139297 A US65139297 A US 65139297A US 1897651392 A US1897651392 A US 1897651392A US 664209 A US664209 A US 664209A
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lamp
plate
board
locking
wire
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US65139297A
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James A Brennan
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V1/00—Shades for light sources, i.e. lampshades for table, floor, wall or ceiling lamps
    • F21V1/02—Frames
    • F21V1/08—Frames adjustable

Definitions

  • JAMES A. BRENNAN a citizen of the United States, residing at Worcester, in the county of Worcester and State of Massachusetts, have invented a new and useful Improvement in Arc-Lamps, of which the following is a specification, accompanied by drawings forming'a. part of the same, inwhich-Y Figure l represents in front elevation an arc-lamp, a portion of the hood being broken away.
  • Fig. 2 is an enlarged view of a portion of the feed-wire connected with the lower carbons and showing my improved feed-Wire guard.
  • FIG. 3 is a perspective View of the locking-plate carried by the lamp-chimneys and held against the board from which the lamp is suspended in order to maintain the lamp in a vertical position, the plate shown in Fig. 3 being adapted for a double lamp; and Fig. 4 is a top view of a locking-plate designed for a single lamp and having a portion broken away to disclose one of the clamping-screws.
  • My present invention relates to certain improvements in the class of electric lamps known as arc-lamps; and it has for its objects to provide a guard for the feed-Wire throughout that section exposed either to the heat of the lamp or to the contact of the attendant in replacing the carbons by which the insulation of the feed-Wire is liable to become impaired and also to provide means whereby the lamp can be maintained in a true vertical position and held from being swayed by the wind or other causes.
  • Fig. 1 represents in front elevation an arc-lamp supported upon a post A by meansl of the vertical rods B B, which sustain a horizontal board C, to which the hood D is attached and from which the lamp proper is suspended by means of metallic hooks E, attached to the board C and engaging hooks F, attached to the lamp, said hooks constituting a part of the circuit through which an electric current is supplied to the upper carbons.
  • G G denote the rod-tubes of the lam p,which in the present instance is represented as a needing protection.
  • the lower carbons I I and globe J are suspended by rods K K, and the lower carbons are supplied with an electric current through a feed-Wire L, which is carl ried down in contact with the inner side of one of the rods K.
  • the Wire L consists of a metallic core cov ered with insulating material N in the usual manner, and to that portion of the feed-wire which is most exposed to the heat of the lamp I apply a metal guard inclosing the insulating material and consisting of a closely-Wound coil of wire forming a flexible sleeve O, which is capable of being drawn on over the end of the feed-Wire and brought into position to cover that portion subjected to the greatest heat or liable to be impaired by the attendant in replacing the carbons.
  • the sleeve O is wound upon an arbor of sufficient length to protect as ,much ofthe wire as needs protection and of the proper internal diameter to allow it to be slipped over the feed-wire, so it can readily be applied to or removed from any lamp or a new one'substituted.
  • my invention consists of a previously-wound coil forming a sleeve adapted to be slipped over the end of the feed-wire and adjusted in position to cover the portion of the feed-wire When placed in position, the sleeve O is capable of being bent to it the side of the arm B, as at P P', and is held in position by a wire O, wound around the sleeve O and the arm B.
  • the device for locking the lamp in a vertical position consists of a locking-plate R, (represented in perspective view in Fig. 3,) comprising the two clamping-blocks R' and R2, provided with holes Rs R3, fitting the rod-tubes G G, upon which the lockingplate is clamped by means of a tighteningscrew S.
  • the upper side of the locking-plate is preferably provided with rubber blocks T, attached to the locking-plate and bearing against the under side of the board C, from which the lamp is suspended, in order to allow the lamp to yield slightly, the tension of IOO the rubber blocks T also serving to hold the hooks E and F in close contact, so as not to impair the circuit.
  • Fig. 4I have represented a locking-plate U, provided with a single hole U', designed for a single lamp having but one rod-tube.
  • the plate U is provided with the rubber blocks T and is clamped upon the chimney by two clamping-screws S S, one upon each side of the chimney-opening U'.
  • ing-screws S S engage nuts inserted in one of the clamping-blocks, one of said nuts being represented at V, Fig. 4.
  • the locking-plate 'R is slipped down on the rod-tubes Gr to allow the hooks E and F to be engaged when the locking plate R is pushed upwardly against the under side of the board C and clamped in position by means of the clamping-screws S, with the rubber blocks T preferably slightly compressed and bearing against the under side of the board C, thoreby holding the lamp against.
  • upward Inovernent which would break the Contact of the hooksE and F,and also holding the lamp from being swayed by the wind or other causes.
  • the locking-plate R may be applied to the rod-tubes Gabove the board C and resting thereon either with or without a locking-plate upon the under side of the board, as represented. Therefore I do not confine myself t0 the specific position of the locking-plate R or to the use of a single locking-plate on a lamp.
  • the essential feature of my locking device consists in the employment of a plate carried by the lamp and parallel with the horizontal board C or the hanger-board of the lamp, preferably with a yielding pressure between the plate and the hanger-board, said yielding pressure tending to maintain the plate parallel with the board C, and thereby holding the lamp in a vertical position or restore the lamp in case it has been moved out of a Vertical position.
  • a plate carried by the lamp and parallel with the horizontal board C or the hanger-board of the lamp preferably with a yielding pressure between the plate and the hanger-board, said yielding pressure tending to maintain the plate parallel with the board C, and thereby holding the lamp in a vertical position or restore the lamp in case it has been moved out of a Vertical position.

Description

UNITED. STATES JAMES A. BRENNAN, OF WORCESTER, MASSACHUSETTS.
ELECTRIC-ARC` LANI P.
I i SPECIFICATION forming part of Letters Patent No. 664,209, dated December 18, 1900.
Application iiled September 11| 1897. Serial No. 651,392. tllo model.)
T0 all whom/ it' may 'con/cern:
Be it known that'I, JAMES A. BRENNAN, a citizen of the United States, residing at Worcester, in the county of Worcester and State of Massachusetts, have invented a new and useful Improvement in Arc-Lamps, of which the following is a specification, accompanied by drawings forming'a. part of the same, inwhich-Y Figure l represents in front elevation an arc-lamp, a portion of the hood being broken away. Fig. 2 is an enlarged view of a portion of the feed-wire connected with the lower carbons and showing my improved feed-Wire guard. Fig. 3 is a perspective View of the locking-plate carried by the lamp-chimneys and held against the board from which the lamp is suspended in order to maintain the lamp in a vertical position, the plate shown in Fig. 3 being adapted for a double lamp; and Fig. 4 is a top view of a locking-plate designed for a single lamp and having a portion broken away to disclose one of the clamping-screws.
Similar letters refer to similar parts in the different figures.
My present invention relates to certain improvements in the class of electric lamps known as arc-lamps; and it has for its objects to provide a guard for the feed-Wire throughout that section exposed either to the heat of the lamp or to the contact of the attendant in replacing the carbons by which the insulation of the feed-Wire is liable to become impaired and also to provide means whereby the lamp can be maintained in a true vertical position and held from being swayed by the wind or other causes.
Referring to the drawings, Fig. 1 represents in front elevation an arc-lamp supported upon a post A by meansl of the vertical rods B B, which sustain a horizontal board C, to which the hood D is attached and from which the lamp proper is suspended by means of metallic hooks E, attached to the board C and engaging hooks F, attached to the lamp, said hooks constituting a part of the circuit through which an electric current is supplied to the upper carbons.
G G denote the rod-tubes of the lam p,which in the present instance is represented as a needing protection.
double lamp or having two pairs of carbons consisting of the upper carbons H H and the lower carbons I I. The lower carbons I I and globe J are suspended by rods K K, and the lower carbons are supplied with an electric current through a feed-Wire L, which is carl ried down in contact with the inner side of one of the rods K. The Wire L consists of a metallic core cov ered with insulating material N in the usual manner, and to that portion of the feed-wire which is most exposed to the heat of the lamp I apply a metal guard inclosing the insulating material and consisting of a closely-Wound coil of wire forming a flexible sleeve O, which is capable of being drawn on over the end of the feed-Wire and brought into position to cover that portion subjected to the greatest heat or liable to be impaired by the attendant in replacing the carbons. The sleeve O is wound upon an arbor of sufficient length to protect as ,much ofthe wire as needs protection and of the proper internal diameter to allow it to be slipped over the feed-wire, so it can readily be applied to or removed from any lamp or a new one'substituted.
I am aware that it is not new to wind a coil of wire around an electric cable to form an outside armor to prevent mechanical injuries thereto, and I do not claim such; but my invention consists of a previously-wound coil forming a sleeve adapted to be slipped over the end of the feed-wire and adjusted in position to cover the portion of the feed-wire When placed in position, the sleeve O is capable of being bent to it the side of the arm B, as at P P', and is held in position by a wire O, wound around the sleeve O and the arm B.
The device, as represented in the accompanying drawings, for locking the lamp in a vertical position consists of a locking-plate R, (represented in perspective view in Fig. 3,) comprising the two clamping-blocks R' and R2, provided with holes Rs R3, fitting the rod-tubes G G, upon which the lockingplate is clamped by means of a tighteningscrew S. The upper side of the locking-plate is preferably provided with rubber blocks T, attached to the locking-plate and bearing against the under side of the board C, from which the lamp is suspended, in order to allow the lamp to yield slightly, the tension of IOO the rubber blocks T also serving to hold the hooks E and F in close contact, so as not to impair the circuit.
In. Fig. 4I have represented a locking-plate U, provided with a single hole U', designed for a single lamp having but one rod-tube. The plate U is provided with the rubber blocks T and is clamped upon the chimney by two clamping-screws S S, one upon each side of the chimney-opening U'. ing-screws S S engage nuts inserted in one of the clamping-blocks, one of said nuts being represented at V, Fig. 4. The locking-plate 'R is slipped down on the rod-tubes Gr to allow the hooks E and F to be engaged when the locking plate R is pushed upwardly against the under side of the board C and clamped in position by means of the clamping-screws S, with the rubber blocks T preferably slightly compressed and bearing against the under side of the board C, thoreby holding the lamp against. upward Inovernent, which would break the Contact of the hooksE and F,and also holding the lamp from being swayed by the wind or other causes.
In case a feed-wire is employed for the upper set of carbons the locking-plate R may be applied to the rod-tubes Gabove the board C and resting thereon either with or without a locking-plate upon the under side of the board, as represented. Therefore I do not confine myself t0 the specific position of the locking-plate R or to the use of a single locking-plate on a lamp.
The essential feature of my locking device consists in the employment of a plate carried by the lamp and parallel with the horizontal board C or the hanger-board of the lamp, preferably with a yielding pressure between the plate and the hanger-board, said yielding pressure tending to maintain the plate parallel with the board C, and thereby holding the lamp in a vertical position or restore the lamp in case it has been moved out of a Vertical position. For convenience Iconnect The clamp;m f
the plate to the lamp by clamping it to the rod-tubes; but I do not confine myself to this method of supporting the locking-plate by the lamp.
It is customary in arc-lamps suspended from the board C to provide an opening through the center of the board of considerable size to receive the rod-tubes G, and the space within the hood affords a secure and Dinviting place for birds to build their nests. By clamping the locking-plate to the rodtubes I am able to hold it sul'liciently near the board C to close this opening and prevent the access of birds to the hood of the lamp.
What I claim as my invention, and desire to secure by Letters Patent, is-
1. In an electric-arc lamp, the combination with the lamp-tubes and hanger-board, of a plate adjustably attached to the lamp-tubes and bearing against the hanger-board, whereby the lamp is held from swaying, substantially as described.
2. In an electric-arc lamp, the combination with the lamp-tubes and a hanger-board, of a plate adjustably attached to said tubes and held parallel with the hanger-board and yielding blocks interposed between said plate and said hanger-board and in contact therewith, substantially as described.
3. In an electric-arc lamp, the combination with the rod-tubes and hanger-board, of a locking-plate, means for adjustably attaching said locking-plate to the rod-tubes of the lamp, whereby it is held in a position parallel with the hanger-board, yielding cushions interposed between said locking-plate and said hanger-board and means for supporting the lamp from said hanger-board, substantially as described.
Dated this 23d day of August, 1897.
JAMES A. BRENNAN.
Witnesses:
RUFUs B. FOWLER, M. C. PRICE.
US65139297A 1897-09-11 1897-09-11 Electric-arc lamp. Expired - Lifetime US664209A (en)

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