US1524919A - Circuit-continuing device - Google Patents

Description

H. A. DOUGLAS CIRCUIT CONTINUING DEVICE Fi-Ied March 22. 1923 751 67. (Wag 5 &

Patented Feb. 3, 1925.

U N I HARRY A. DOUGLAS, OF BRONSON, MICHIGAN.

CIRCUIT-CONTINUING DEVICE.

Application filed March 22, 1923. Serial No. 626,992.

To all whom it may concern:

Be it known that'I, HARRY A. DOUGLAS,

citizen of the United States, residing at.

Bronson, in the county of Branch and State of Michigan, have invented a certain new and useful Improvement in Circuit-Continuing Devices, of which the followingis a full, clear, concise, and exact description. My invention relates to circuit continuing devices employing contact carriers and mountings therefor and resides in the provision of improved means for effecting the assembly of such carriers and their mountings. My invention is of particular service in connection with incandescent lamps which are carried by shells, these shells preferably having their construction modified, in accordance with my invention,-whereby the contact carriers in the shells which are complemental to the incandescent lamps may be assembled with the mountings that are to support the entire lamp structures.

My invention has actually been embodied in a so-called cowl lamp'structure, the lamp holding shell having a formation which supports the cowl and also entering into the preferred construction for effecting the as-v sembly of the cowl lamp and the mounting. The invention, however, is not to be limited to its employment in connection with incandescent lamps as other forms of contact carriers may be assembled with their mountings by means of my invention.

In carrying out my invention the shell which is assembled with the contact carrier itself carries lateral projections spaced apart longitudinally of the shell. 'Ihe mounting partially fills the space between these projections to permit of the reception of a retaining device which is interposed between and engages said mounting and one of said projections to hold the mounting and the other lateral projection in assembly, said retaining device being adjustable from its position to permit removal of the shell and the parts carried thereby.

In the preferred embodiment of the invention the retaining device includes two keys each having an outwardly facing holding portion receivable between and engage able with the mounting and two ears which constitute the laterally projecting formation of the shell upon one side of the mounting. Each of these keys has a stem portion received in registering openings formed in the mounting and through the other lateral projection of the shell which is desirably continued into a cylindrical skirt that is spaced apart from the body portion of the shell. These keys thus serve not only to prevent longitudinal movement of the shell with respect tothe mounting but also the rotary movement of the shell within the mounting. A leaf spring preferably enters into the construction of the retaining device, this spring being disposed in the space between the cylindrical skirt and the body of the shell. This spring spreads the keys apart and holds them in retaining positions.

The invention will be more fully explained by reference to the accompanying drawing in which Fig. 1 is a view, partially in elevation and partially in section, of a cowl lamp constructed in accordance with the preferred embodiment of the invention; Fig. 2 is a view illustrating the base of the incandescent lamp in elevation and parts in association therewith in section; Fig. 3 is a sectional view on line .33-of Fig. 1; Fig. 4 is a perspective view of the preferred form of retaining device; Fig. 5 is a front view with the lamp removed; and Fig. 6 is a view on line 6-6 of Fig. 1.

Like parts are indicated by similar characters of reference throughout the different figures.

One contact carrier illustratedis in the form of the base 1 of an incandescent lamp whose filament 2 has one end connected with the contact 3 upon the end of the lamp base, the other end of the filament being connected with the metal sheath which surrounds the base of the lamp whereby the device is constituted a single pole device,

though it is to be understood that the in-' vention is not to be thus limited.

Bayonet pins 4 are provided, upon the lamp base and are receivable within bayonet slots 5 formed in the metallic cylindrical shell 6 at one end of this shell. A ring 7 of insulation constitutes another contact carrier which, together with the contact thereon, is assembled with the mounting by means of the construction of my invention,

the shell 6 being preferably employed as a part of the means for mounting this contact carrier but to the employment of which the invention is not to be limited. This ring is located within the other end of the shell and carries a cup 8 through whose bottom a contact plunger 9 extends. This contact plungeris surrounded by a coiled spring 10 which presses the contact head 11 of the contact plunger 9 against the lamp terminal 3 when the bayonet pins 4 are withintheir bayonet seats. The spring 10 thus not only causes the lamp to be included in circuit but also maintains its assembly with the shell.

The shell is formed with a lateral continua'tion 1'2 and a surrounding cylindrical skirt 13 which is spaced apart from the body of'the shell and is connected therewith by said lateral continuation or projection 12. Ears 14. are struck laterally from the shell upon opposite sides thereof and opposite that end of the skirt which is remote from the lateral continuation 12, these cars being spaced apart from said skirt longitudinally of "the shell. The dash board or other mounting 15 is formed with a hole 16 through which the shell and its ears may be passed in the process of assembling the lamp structure and its mounting. The skirt 13 however, is too large for passage through the opening '16 so that when the structure is in its final position engagement between the mounting and the adjacent end of the skirt 13 is'ri orced. The opening 16 is desirably contracted except where the cars 14: areto pass therethrough. The lateral continuation or projection 12 is formed with radial openings 17 which register with the portions of the opening 16 that permit passageof the cars 14. The retaining device desirably includes two keys each having an outwardly facingholding portion 18 recciv able between and engageable with the mounting and the ears. Each of these keys has a stem portion 19 received in the registering openings 17 and 16. These keys thus serve not onlyto prevent longitudinal movement of the shell with respect to the mounting but also the rotary movement oi the shell within the mounting. A leaf spring 20 preterably enters into the structure ottlie retaining device, this springbeing disposed in the space between the cylindrical skirt and the body; of the shell. This spring spreads the keys apart and holds them in retaining positions.

The keys project outwardly through the openings 17 sutficiently to permit them to be engaged whenever the. lamp structure is in be removed, in which event the keys are pressed toward each other against the force of the spring 20. When the keys are inser'ted the noses 18 thereof are first entered into the openings 17. These noses slant as indicated so that the spring 20 will be automatically contracted as thekeys are in passage. 'l Vhen the key noses 18 are in the spaces between the cars 14 and the mounting rea ers 15 the spring 20 will spread the keys apart to bring the noses into holding engagement with the mounting.

While T have herein shown and particu larly described the preferred embodiment of my invention I do not wish tobe limited to the precise details of construction shown as changes may readily be made without departing from the sipirt of my invention, but having thus described my invention I claim as new and desire to secure by Letters Patent the following 1. The combination with a contact carrier; of a shell with which said carrier is assembled and which shell carries lateral projections spaced apart longitudinally of the shell; a mounting in the space between said projections; and a retaining device interposedbetween and engaging said mounting and one of said lateral projections to hold the mounting and the'other lateral projection in assembly, said retaining device being adjustable from its position to permit removal of said shell and including a spring for yieldingly retaining it in holding position, said mounting and one of said lateral projections being formed to permit passage of the re-taining'device through the mounting to holding position between the mounting and the other lateral projection. V

2. The combination with a contact carrier; of a cylindrical shell with which said carrier is assembled and which shell is pro vided with a surrounding lateral continuation and a surrounding skirt which is connected therewith by said lateral continua tion, said shell also being provided witl'i laterally projecting ears upon opposite sides thereof and opposite the end of'said skirt which is remote from said lateral continuation, said ears being spaced apart from said skirt longitudinally of the'shell; a mounting in the space between said lateral con tinuat-ion and said ears and? engaged with the adjacent end of said skirt and spaced apart from said ears; and a retaining device interposed between and engaging said mounting and said ears.

3. The combination with a contact carrier; of a cylindrical shell with which said carrier is assembled and which shell is provided with. a surrounding lateral continua tion and a surrounding skirt which is con nected therewith by said lateral continuation, said shellalso being provided with lateral P oje t a eras enpes te thereof and opposite tl' c'jend of said skirt which is remote from said. lat continua tion, said ears being spaced apart- TIOllTi said skirt longitudinally of the shell; amounting in the space between said lateral continua tion and said ears and? engaged with the ad:- jacent end of said skirt andspaced apart from said ears; and a key structure having a holding portion receivable between and engageable with the mounting and one of the lateral projections, said key structure also having a stem portion received in registering openings formed in the mounting and the other lateral projection, there being portions margining said openings which obstruct movement of the shell in the plane of the mounting.

4. The combination with a contact carrier; of a cylindrical shell with which said carrier is assembled and which shell is provided with a surrounding lateral continuittion and a surrounding skirt which is spaced apart from the body of the shell and is con nected therewith by said lateral continuation, said shell also being provided with laterally projecting ears upon opposite sides thereof and opposite the end of said skirt which is remote from said lateral continuation, said ears being spaced apart from said skirt 1ongitudinally of the shell; a mounting in the space between said lateral continuation and said ears and engaged with the adjacent end of said skirt and spaced apart from said ears; and a retaining device including two keys each having an outwardly facing holding portion receivable between and engageable with the mounting and one of said ears and also having a stem portion received in registering openings formed in the mounting and the said lateral continuation of the shell, there being portions margining said openings which obstruct movement of the shell in the plane of the mounting, the retaining device also including a leaf spring disp in the space between the shell and its cylindrical continuation, this leaf spring carrying said keys and pressing them outwardly to retain them in holding positions,

5. The combination with a contact carrier provided with lateral projections spaced apart longitudinally thereof; of a mounting in the space between said projections; and a key structure having a holding portion receivable between and engageable with the mounting and one of the lateral projections, said key structure also having a stem portion received in registering openings formed in the mounting and the other lateral projection, there being portions margining said openings which obstruct movement of the contact carrier in the plane of the mounting.

6. The combination with a contact carrier provided with lateral projections spaced apart longitudinally thereof; of a mounting in the space between said projections; I a key structure having a holding portion receivable between and engageable with the mounting and one of the lateral projections, said key structure also having a stem portion received in registering openings formed in the mounting and the other lateral project-ion, there being portions margining said openings which obstruct movement of the contact carrier in the plane of the mounting; and a spring member pressing upon the key in a direction to keep it in holding position.

In witness whereof, I hereunto subscribe my name this 19 day of February, A. D.

HARRY A. DOUGLAS.

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