US1380100A

US1380100A - Lamp

Info

Publication number: US1380100A
Application number: US142729A
Authority: US
Inventors: Ellsworth A Hawthorne
Original assignee: Individual
Current assignee: Individual
Priority date: 1917-01-16
Filing date: 1917-01-16
Publication date: 1921-05-31
Anticipated expiration: 1938-05-31

Description

E.A. HAWTHORNE.

LAMP.

APPLICATION FILEDJAN. I6. 1917.

Patented' May 31, 1921.

l LAMP.

Specification of Letters Patent. Ilaptqented ltgty 31, 1921.

Application sied January 1e, 1,917. serial` Nb. 142,729.

To all whom t may concern:

Be it known that I, ELLswoRTHA. HAW- THoRNE, a citizen of the United States, and a resident of Bridgeport, in the county of 5 Fairfield and State of Connecticut, have invented an Improvement in Lamps, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts. l

y This invention Vrelates to lamps, and is more particularly concerned with means for fastening parts ofl the lamp togetherv in sucha manner as to hold them securely, and to facilitate assembling and dismounting them. l v

My invention will be best understood by reference to the following description, when taken in connection with the accompanying drawings of one specific embodiment thereof, while its scope will be more particularly pointed out in the appended claims.

In the drawings: Figure 1 is` a central, longitudinal sectional view, partly in'elev'ation, of a lamp embodying my invention; l j

Fig. 2 is a detail sectional view, on an en larged scale, of a portion of Fig. 1;

Fig. 3 is a detail sectional view, on an enlarged scale, on line 3 3 of Fig. 1; and

Fig. 4 is a detail, sectional view, on an enlarged scale, on line 4 4 of Fig. 1.

Referring to the drawings, and to the embodiment of my invention which is selected for illustration, I have there shown a lamp having a suitable principal light source, or light-producing means, herein in the form of an incandescent electric bulb 5, whose rays are suitably focused and projectedV by one or more reflectors, herein a parabolic re# flector 6, disposed at the rear of the main light source, and a spherical reflector 7, disposed forward of the main light source. Incidentally, this spherical reflector serves also as a shield to limit the range of a supplemental light source, or light-producing means, herein in the form of an incandescent electric bulb 8. It is unnecessary herein to consider the manner in which these reflectors affect the light rays, since such featurey forms the subject matter of an application,

of'another party. Itl will suffice to say that the light rays may be,v and herein are, projected through suitable light-transmitting means, herein in the form of a lens or glaza ing 9.

The lamp is provided with a suitable casing, herein comprising two parts 10 and 11. In the `present instance, the part 10 constitutes the body of the casing, and the 'part 11 the bezel or door. rThe latter hereinserves as a mounting or frame for vthe lensor glazing 9, and to that end, the front face of the latter is seated against a suitableseat 12, herein formed as a part'of the bezel,`the glazing lbeing held seated thereagainst` by appropriate means, Suchfor example as a retaining ring 13, whose periphery is seated in and interlocked withav grooved' bead 14 provided in the bezel 11. f

The body 10 and bezel 11k are herein telescoped, one upon the other, and one of thern,l

herein the body 10, is provided with a seat 15, against which is seated a flange 16, formed onthereflector 6. This flange, in turn, is provided with a seat 17 for a flange 18 formed onthe'reflector 7, the latter being herein centered with relation to the reflector l 6 by a lip or shoulder 19, best shown in Fig.

2, formed on thev flange 16,-,and encircling the flange 18. l, Y

As a means for retaining the reflectors so seated Vone against'the other, and such other against its seat inthe casing, I have herein provided a retaining member in the form of a ring 20, seated against the flange 18. This ring may be, and herein is, seated in a grooved bead 21 formed in the body 10 of the casing. This ring is preferably expansible and contractible,and is normally expanded so that part of its cross section enters the grooved bead 21, as best shown in Fig. 2. n f

As a means for holding the -retaining member 20 in place, and for securing the casing parts 10 and 11 together,I have provided suitable means, herein comprising a plurality of radial screws 22, extending through perforations 23 formed in a flange 24 on the bezel 11, and extending also through bayonet slots 25 provided in a flange 26 on the bodyv 10. `The

flanges

24 and 26 are mounted to turn and move axially one upon the other, so that the two casing parts may be locked together by first moving them in an axial direction to'introduce the screws 22 into the bayonet slots 25,-.and then 'turn- This actionr will be readily understood by CIK an inspection of Fig. 4;, Which shows *onev of the bayonet slots with the screnT therein.

Threaded on to the screws 22 are nuts 2T, Which serve a tivo-fold purpose. ln the first place, these nuts hold their respective screws in place, and when tightened, clamp the casing parts together'. 1n the second place, these nuts are utilized as a means for exerting pressure against the ring 2O in an axial direction against the flange 18, thereby holding the latter against its. seat 17, and also holding` the flange 16 against its seat 15.

This result is herein obtained by providing a nut having a corner 28, Whose radius (represented by the line nl in 3) from the axis of the nut to such corner is slightly greater than the shortest distance 'from said axis to the ring 20. Assuming ythat the screw and nut are provided with, ,right-hand threads, 1when the screw is turned in the direction of the arron7 B in Fig. 3 to tighten the same, the natural tendency Ais to turn the nut about its axis in the direction of said arrow. r1`he corner 28, therefore, exerts a wedging action against the ring 2G, thereby forcing the latter in an axial direction toward the seat 15n V1`his will naturally tend to expand the ring radially into its bead, thus seating the ring firmly thereinto, and seating` the reflectors one against the other, and the latter against its seat in the casing.

rlhus it will be seen that 'there is provided a single means which fastens the two parts of the casing together, and fastens the reflectors therein. By simply loosening the screws 22 to the proper extent, yet Without entirely unscreyving them, the casing parts may be separated by turning one upon the other the required distante' to bring the screws inv line with the entrances of the bayonet slots, and then oppositely moving the casing parts axially to Withdraw the screws from the bayonet slots. The parts are reassembled by simply reversing the foregoing operation.

While 1 have herein shown and deserioed one specific form or embodiment of. my invention. for illustrative purposes, and have disclosed and discussed in detail the ron-l struction and arrangement incidental to one specific application thereof, it is to be understood that the invention is limited neither to the mero details or relative arrange .rent of parts, nor to its specific embodiment herein shown, but that extensive deviations from the illustrated rorm or embodiment of the invention may be made Within the siope of: the appended claims, Without departing from the principles thereof.

Having thus described my invention, Twhat l claim d desire by Letters Patent to procure is 1. 1n a lamp, the combination of a casing in two parts, one telescoped Within the other,

one being provided With a plurality of bayonet slots, and one being provided With a seat, a plurality of reflectors disposed Within said casing, one or" said reflectors being seated against the other, and such other reflector being seated against said seat, a retaining member for retaining said reflectors so seated, and means 'for holding said retaining member in place and for holding said casing parts together, said means including iastening elements located in said bayonet slots, respectively.

2. in a lamp, the combination of a casing comprisingtvvo parts, one telescoped ivithin the other, one being provided with a plurality of openings, and one being provided with a seat, a reflector disposed Within said casing and seated against said seat, and means for holding said reector seated against said seat` and for holding said casing parts together, said means comprising fastening elements extending through said openings to the exterior of said casing and being operable by movement relatively to both of said easing parts to urge said reflector against said seat.

3. ln a lamp, the combination of a casing in tvvo parts, one telescoped Within the other, one being provided with a' plurality of bayonet slots, and one being provided with a seat, a plurality of reflectors disposed Within said casing, one of said reflectors being seated against the other, and such other reflector being seated against said seat, a retaining member for retaining said reflectors so seated, and means for holding sai d retaining member in place and for holding said casing parts together, said means including threaded elements extending through said .bayonet slots, respectively. Y

Il., 1n a lamp, the combination of a casing in tivo parts one telescoped Within the other, one being provided with a plurality of slots, and one being provided with a seat, a reflector disposed Within said casing and seated against said seat, and means for holding said reflector` seated against said seat and for holding said casing parts together, said means including` threaded elements extending from the exterior of said casing through said slotsq respectively and operable independently of relative movement of said casing parts.

5. 1n a lamp, the combination of a casing in tivo parts one telescoped Within the other,

one being provided with. a plurality of'bayonet slots, and one being provided with a seat, a plurality of' reflectorsdisposed Within said casing, one of said reflectors being seated against the other, and such other reflector being seated against said seat, a retaining member for retaining said reflectors so seated, and means for holding said retaining member in place and for holding said casing parts together, said means including screws extending through said bayonet slots, respectively, and ,nuts threaded onto said screws, respectively, and engaging said retaining member.-

6. In a lamp, the combination of a casing in two parts one telescoped within the other, one being provided with a plurality of bayonet slots, and one being provided with a seat, a reflector disposed within said casing and seated against said seat, and means for holding said reflector seated against said seat and for holding said casing parts together, said means including screws extending through said bayonet slots, respectively, and nuts threaded onto said screws, respectively, and, by relative turning movement of said screws and nuts, urging said reflector against said seat.

7. In a lamp, the combination of a casing in two parts one telescoped within the other, one being provided with a plurality of bayonet slots, and one being provided with aV seat, a plurality of reflectors disposed within said casing, one of said reflectors being seated against the other, and such other reflector being seated against said seat, a retaining member for retaining said reflectors so seated, and means for holding said retaining member in place and for holding Said casing parts together, saidmeans including screws extending through said bayonet slots, respectively, and nuts threaded onto said screws, respectively, and havingportions engaging said retaining member with a wedging action.

8. In a lamp, the combination of a casing in two parts,'one telescoped within the other, one being provided with a plurality of bayonet slots, and one being provided with a seat, a reflector disposed within said casing and seated against said seat, and means for holding said reflector seated against said seat and for holding said casing parts together, said means including screws extending through said bayonet slots, respectively, and nuts threaded onto said screws, respectively, and exerting a wedging action against said reflector to hold the latter against said seat.

9. In a lamp, the combination of a casing in two parts one telescoped within the other, one being provided with a plurality of bayonet slots and one being provided with a seat, a plurality of reflectors disposed within said casing, one of said reflectors having its marginal portion seated against the other, and such other reflector having its marginal portion seated against said seat, a retaining member for retaining said reflectors so seated, and means for holding said retaining member in place and for holding said casing parts together, said means including fastening elements located in said bayonet slots, respectively.

l0. In a lamp, the combination of a casing comprising twoparts, one telescoped within the other, each being provided Ywith a plurality of openings, and one being provided with a seat, a` reflector housed within said casing and having its marginal portion seated against said seat, and means for holding said marginal portio'n so seated and forholding said casing parts together, said means including screws'extending from the exterior of said casing into said openings. e f

l1. In a lamp, the combination of a casing in two parts, one provided with a generally VL-shaped bayonet slot and one being provided with a seat, a reflector disposed within said casing and -having its marginal portion seated against said seat, and means for urging said marginal portion in an axial direction against said seat andvfor holding ,p

said casing parts together, said means including a fastening element located 1n said bayonet slot and exerting an axial thrust ing provided with a plurality of openings, v

a reflector having` a marginal portion seating in a rearward direction in said casing, and means to urge said reflector rearwardly against its seat, said means including a plurality of screws extending through said" openings to the exterior of said casing and being operable by movement relatively to said casing to. urge saidreflector against said seat.

14. In a lamp, thecombination of a casing in two parts, one of which presents a seat, a redector within said casing and seated axially against said seat, and means for exerting a leverage action in an axial direction to secure said casing parts to each other and to urge said reflector against said seat, said means comprising an actuating element normally accessible and operable from the exterior of said casing.

15. In a lamp, the combination of a casing in two parts, a reflector, and means to secure said parts to each other, said means having provision for exerting holding pressures in an axial direction against said reflector and in a radial direction with relation to said casing.

16. In a lamp, the combination of acasing in two parts, a reflector, and means to secure said parts to each other, said means including a threaded member exerting holding pressures in an axial direction against said reflector and in a radial direction With relation to said casing.

17'. In alamp, the combination of casing in two parts, a reflector, and means to secure said parts to each other, said means including a radially disposed threaded mein" ber exerting` holding` pressures in an axial direction against said reflector and in a radial direction with relation to said easing.

18. ln a lamp, the combination of a oasing inv two parts, a reflector, and means to secure said parts to eaeh other, said means including; a pair of cooperating radially disposed threaded members exerting holding pressures in an axial direction against said i5 reiector and in a radial direction with relation to said easing.

ln testimony whereof, I have signed my name to this specification.

ELLSVVORTM A. HAWTHORNE.