US1573394A

US1573394A - Parking lamp

Info

Publication number: US1573394A
Application number: US45208A
Authority: US
Inventors: James J Gough
Original assignee: CHICAGO ELECTRIC Manufacturing CO
Current assignee: CHICAGO ELECTRIC Manufacturing CO
Priority date: 1925-07-22
Filing date: 1925-07-22
Publication date: 1926-02-16
Anticipated expiration: 1943-02-16

Description

Feb.- 16 '.1926'.

J. J. GOUGH PARKING LAMP Filed J'uly 22, 1925 may be slid back and forth circumferent-i ally of the casing. To connect the two parts of the switchingmember, I provide the switching element 26 with a pair of slots 21 and provide the companion element with a pair of arms 22, which arms are yof a width correspending to the width of the slot 19. Each of these arms extends through one of the slots 21 and has its free end bent over the inn-er face of the switching element 26 as shown in Fig. 7, so as to secure the latter element to the casing. One end of the switching element 26 is bent inwardly so as to afford a linger 23 adapted to engage the auxiliary wing 15 on one of the shanl-1s12 Vof the metal lamp-bulb holder, and this linger desirably `is indentedA as shown in Fig., 7 so thatit will yieldingly interlock with the end of the wing 15 when the switching member is moved from the circuit-opening position (shown in full lines in Fig. 7) to its circuit-closing position as shown in dotted lines in the same figure. FurtherI more, the main portionof the switching element 26 is initially formed of a general curvature greater in radius than the bore oi' the tubular casing portion 5, so that the fas' tening of this switching element to the cas ing by means of the digitally movable fastening element will flex the element 26 to a reduced curvature, thereby forcing it into a frictional engagement with the bore of the casing so as to prevent accidental displacement of the switching member from any position to which it has been manually moved. By making the spaced arms 22 of a width corresponding to that ofthe slot 19, I enable these to guide the switching element 26 so as to restrict the. latter to movements circumferentially of thetubularcasing por tion, and by providing the fastening element of this switching member with an enlarged head 20, I avoid the necessity of employing auxiliary fastening elements.

To avoida grounding of the metal holder` through a. possible tilting of the bolts 2, I desirably provide the lower .insulator 9. with a pair of upwardly projecting wings 24, each of which extends between one arm 12 of the lamp-bulb holder and the head of vone of the bolts 2. Y

Thus constructed, and with the bore of thel tubular casing portion of Va diameter greater than the bulb of the lamp-bulb, a removal of the screw 4 permits the main portion of the casing to be lifted off the base, thereby affording convenient access to the binding post' 16 and permitting a removal or replacing the lamp bulb. By clamping the bight of the holder between the central portions of the two insulators, I provide a convenient fastening for this holder' withoutelectrically'connecting it to the casing, Vthereby securing a quite simplev construction suitable for use with a circuit which has one side grounded in the usual manner. n'

However, while I have illustrated and described m'y invention in a highly desirableY embodiment, I do not wish to be limited to the details of the construction and arrangement here disclosed, it being obvious that many changes might be made without departing either from the spirit of my invention'or from the appended claims.

I claim as my invention 1. In a lighting device of the class described, a metallic casing including a base, a substantially U-shaped bulb holder having its bight secured to the base, a lamp bulb having its base gripped between the arms of the holder, means insulating the holder from the casing, a resilient contact member Vdisposed for engaging the axial terminal of the lamp bulb, and a switching member movably mounted on the casing for movement ing member being disposed for engaging the tip of one arm of the holder.

2. A lighting deviceas per claim 1, in

which the switching ymember has its armengaging portion formed for interlocking Y with the said tip to hold the switching member yieldingly in its circuit-closing position. 3. In a lighting device, a lamp bulb, a U-shaped holder gripping the base of the circumferentiallv ofthe latter, the switch- Y lamp bulb between its arms, a supporting tively at opposite sides of the holder and extending through the base for securing the device to a support, one of the insulators having portions thereof extending longitudinally ofthe holder between the latter and the threaded members'. 4. In a lighting device of the class described, a metallic casing having a base, a substantially U-shaped bulb holder having its bight secured to the base, a lamp bulb having its base gripped between the arms of the holder, means insulating the holder from the casing, a resilient contact member disposed for engaging the. axial terminal of the lamp bulb, and a switching' member mounted on the casing and adapted to be moved into and out of contact with the holder, the casing having a slot extending circumferentially thereof; the switching member comprising a metal strip disposed inside the casing and a forked element presentingv a digitally movable head outside the vcasing and having arms extending through the slot and the strip, the arms having a width corresponding to that of the slot so as to guide the switching member,

the strip having portions engaging the bore of the casing and another portion extending inwardly of the casing and adapted to contact with the holder when the switching member is in one position.

5. In a lighting device, a lamp bulb, a metallic casing housing the base portion thereoiz and connected to one terminal of a circuit; a metallic lamp-bulb holder comprising a substantially U-shaped member having its bight rigidly secured to the casing and having each shank provided at its free end with a laterally extending arm, the said arms being concaved toward each other and gripping the base of the lamp bulb between them; means insulating the lamp-bulb holder from the casing; a contact member in sulated from the said holder and casing and connected to the other terminal of the circuit; and a metal switching member movably mounted on the casing, the holder having one shank provided with an additional arm disposed so as to be engaged by the switching member when the latter is in one position.

6. In a lighting device, a lamp bulb, a metallic bulb holder, a metallic casing having a tubular portion housing the holder, and a resilient metallic switching element mounted upon and guided by the said casing portion for slidable movement circum iferentially thereof and having one end por tion adapted in one position to contact with the holder, the switching element being disposed within the bore of the said casing portion and having a general curvature of greater' radius than the said bore; and means connecting the switching element to the said casing portion and drawing the said element against the said casing portion to flex the said element to a reduced radius, thereby causing friction for preventing accidental movement ot' the said element.

Signed at Chicago, Illinois, July 13th,

JAMES J. GOUGH.