US2654829A - Glass lifting mechanism for hurricane lamps - Google Patents

Description

P. F. M. PlTAVY GLASS LIFTING MECHANISM FOR HURRICANE LAMPS Filed June 1, 1951 Oct. 6, 1953 3 Sheets-Sheet l I I f ush/r0 7510\96 501/60 1: five/57?? y 1 JUL/.6.

0a. 6, 1953 P. F. M. PlTAV Y 2,654,829

GLASS LIFTING MECHANISM FOR HURRICANE LAMPS Filed June 1, 1951 5 Sheets-Sheet 2 P. F. M. PITAVY GLASS LIFTING MECHANISM FOR HURRICANE LAMPS Oct. 6, 1953 3 SheetsShe et 5 Filed June 1, 1951 IZ/Ilnlrot 725786 [kn/cola mom: 727 v/ MW u Patented Oct. 6, 1953 GLASS LIFTING MECHANISM FOR HURRICANE LAMPS Pierre Francois Marie Pitavy, Chalon-sur-Saone,

France, assignor to "Societe Anonyme dite:

ciete Industrielle de Ferbianterle, Paris, France, a corporation of France Application June 1, 1951, Serial No. 229,365 ,In France September 15, 1950 3 Claims.

1 Hurricane lamps are already known in "which the bail is availed of for the purpose of moving the bulb-shaped glass chimney up and down in order to light the lantern. More specifically, a.

particular hurricane lantern type is known in which the bail can overturn freely to one side of the lantern as well as through a portion of its possible displacement towards the other side, the remainder of this latter possible displacement being availed of to lift the glass.

My invention is concerned with a hurricane lamp of the kind described which is provided with a simple and cheap glass-lifting mechanism, the whole of which .is enclosed in the lantern and consequently removed fromany riskof inju y.

The lamp glass is moved up and down through the medium of a chimney which surmounts the same, and my invention also extends to means whereby said glass is removably secured to said chimney.

A lamp according tomy invention will now be described more specifically hereinafter, reference being had to the appended drawings in which:

Figure l is a sectional view taken on the axis of the top portion of the lantern and shows the parts at the beginning of the glass-lifting action.

Figure 2 is a similar sectional view taken at right angles to Fig. 1.

Figure 3 is a fractional plan view .of Fig. .1.

Figure 4 is a sectional view taken on the axis of the top portion of the lantern and shows the parts at the completion of the glass-lifting action.

Figure 5 is a further sectionalview taken on the axis of the top portion of the lantern ready for use, i. c. with the chimney lowered andwith its bail fully dropped to that side where its fall is unrestricted.

Figure 6 is a bottom plan view of the chimney with the glass removed.

Figure 7 is a sectional view taken on line X--X in Fig. 6.

Figure 8 is an elevational view of the top portion of the glass.

Figure 9 is an elevational, partly sectional, view of the connection of the glass with the movable chimney.

Figure 10 is a sectional view taken on line Y--Y in Fig. 9.

The framework of the lamp comprises a bonnet which includes an outer stamped metal barrel I secured to the top ends of a pair of tubular uprights 2 and in which is hinged at 3 the lantern 2 ball 4 while its neck 5 serves as a guide for the slidable chimney 6.

A further barrel-like part I stamped .to asymmetrical U-section is fitted in and secured to said outerharrel I. Said member 1 serves as a guide for a ferrule 8 rigid with theslidable chimney, so that the latter is guided at .two places.

A coil spring 9 abutting atits top end against the neck 5 of the fixed outer barrel I and at its bottom end against the ferrule 8 downwardly urges the whole slidable chimney assembly composed of said ferrule B, chimney B and a cover III on the latter.

The two ends ll (see Fig. 3) of the ball 4 project through a pair of longitudinal slots l2 cut in ferrule 6 and are bent twice and interconnected by a sleeve la, the bailends assembled in this manner thus having the trapezoidal outline shown in Fig. 3. Arranged within the slidable chimney is a spring wire clip 14 the two legs l5 of which are kept engaged at the ends 16 thereof and'by their own resiliencyin a pair of holes in the ferrule 8.

As shown more particularly in Fig. 4, the double bend lll3ll formed by the ends of the bail 4 is located in a plane which intersectsa certain angle with that of the bail proper in order that the slidable chimney shall be locked in its lifted position when the bail is swung down to its chimney lifting position.

The operation of the device is as follows:

Referring again to Fig, 2, CDE in dash and dot line denotes the are over which the bail is freely movable, i. e. remains inoperative, in either direction; C-F-G denotes the are over which the ball is effective to lift the slidable chimney when swung downin the direction of the arrow f; the ball is shownin its position at the beginning of its chimney-lifting action. The bail 4 as already stated is-swingably mounted in bearing holes or eyelets 3 punched through the outer barrel I. The hook or wire clip I4 is caught by the sleeve l3 and becomes effective through the ends I6 of the legs I5 to lift the movable chimney against the action of the loading spring 9.

At the completion of the glass-lifting stroke, the ball 4 and the slidable chimney 8-6l0 occupy the position illustrated in Fig. 4, in which the triangle a b-c formed by the lines through the three centres l3, 3 and I6 clearly shows that the chimney is positively kept in its lifted position since the link system a'-b-c is locked, owing to the fact that the line w-c in the direction of which the action spring 9 is exerted assuming a position beyond the line b-c along der of the restoration process will be taken care of by the spring.

It will be appreciated that with the exception of the unavoidable shifting of the chimney in its guides 5 and I the whole operation of the mechanism only involves pivotal motions, whereby friction is reduced to a minimum.

With the lantern glass removed from its mounting, the downward stroke of the slidable chimney is limited by the length of the slots l2 through which project the ends H of the bail.

The means whereby the glass [1 of the lantern is secured to the ferrule 8 rigid with the slidable chimney are shown in Figs. 6 to 10.

The glass I! is formed at its top end with a bead I8 which delimits a guide bevel 20 and a groove l9. On the other hand, the ferrule 8 is formed at its lower edge with a bent-in portion 2| in which a wire spring 22 is received the two free ends of which are shown at 23. The said wire spring 22, which is retained by its own resiliency within the bent-in portion 2! is formed with straight slightly secant sections 24 (see Figs. 6 and adapted to cooperate with the bead [8 on top of the glass H in the fashion of the female and the male portions of a pressure button.

In fixing the glass to the bonnet, it is only necessary to lay the former upright on the grid of the lantern and to depress the slidable chimney with the aid of the bail, for the purpose of which the resistance opposed by the coil spring 9 should be sufiiciently high to allow the wire spring 22 to swallow the bead l8 and get home into the groove I9 of the glass. sired to detach the glass [1 from the chimney, it is only necessary to keep the glass pressed by its lower part upon the grid of the lantern and to swing the bail in glass-lifting direction, as a result of which the wire spring 22 is slipped once more past the bead l8 and consequently the glass is released from the slidable chimney.

It is to be understood that this lamp glass coupling device is only given by way of example and it can be substituted by any equivalent means involving the cooperation of a bead at the top end of the glass providing a groove for the accommodation of a member rigid with.the chimney 8 adapted to snap thereinto.

I claim:

1. A hurricane lamp comprising a. fixed bonnet, a vertically slidable chimney mounted in said bonnet, a loading spring interposed between said fixed bonnet and said slidable chimney, a swingable bail hinged to the bonnet formed with- When it is dev in the chimney with a double bend, a pair of diametrically opposite longitudinal slots in the wall of the chimney for the bail to project therethrough and a double-armed V-shaped clip within the chimney, hinged by its arms to the latter at the base thereof and separate from the double bend of the bail, the apex of the V-shaped clip being return-bent to provide a hook positioned in the path of swinging movement of the double bend upon rotation of the bail.

2. A hurricane lamp comprising a fixed bonnet, a vertically slidable chimney mounted in said bonnet, a loading spring interposed between said fixed bonnet and said slidable chimney, a swingable bail hinged to the bonnet formed within the chimney with a double bend in a plane at an angle to that of the bail proper, a pair of diametrically opposite longitudinal slots in the wall of the chimney for the bail to project there through, a double-armed V-shaped clip within the chimney, hinged by its arms to the latter at the base thereof and separate from the double bend of the bail, the apex of the V-shaped clip being return-bent to provide a hook positioned in the path of swinging movement of the double bend upon rotation of the bail, and means at the bottom end of the slidable chimney to detachably connect the lamp glass therewith.

3. A hurricane lamp comprising a fixed bonnet, a vertically slidable chimney mounted in said bonnet, a loading spring interposed between said fixed bonnet and said slidable chimney, a swingable bail hinged to the bonnet and formed within the chimney with a double bend in a plane at an angle to that of the bail proper, a pair of diametrically opposite longitudinal slots in the wall of the chimney for the bail to project therethrough, a double-armed V-shaped clip Within the chimney, hinged by its arms to the latter at the base thereof and separate from the double bend of the bail, the apex of the V-shaped clip being return-bent to provide a hook positioned in the path of swinging movement of the double bend upon rotation of the ball, a lamp l glass formed at its top edge with a bead defining a guide bevel at its margin and a groove immediately below said bead, a peripheral recess on the inside of the lower end of said slidable chimney and a resilient wire positioned in and having a portion projecting at least in part from said recess, said wire being resiliently biased toward the center of said chimney.

PIERRE FRANCOIS MARIE PITAVY.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 863,872 Prahm Aug. 20, 1907 967,401 Lyhne Aug. 16, 1910 981,589 Whipple et al Jan. 10, 1911

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