US1654599A - Fitting-table heater - Google Patents

Description

Jan. 3, 1928.

E. J. OVING'TON FITTING TABLE HEATER Filed Feb. 5. 1926 2 Shegts-$heet 1 u! w a im w Jan. 3, 1928.

E. J. ovmca'rbu FITTING TABLE HEATER Filed Feb. 5. 1926 2 Sheets-Sheet 2 lit) ' tening the zylonite.

Patented Jan. 3, 1928.

EDWA D J'. ovmeron, or AUBURNDALE, MASSACHUSETTS.

' FITTING-TABLE HEATER.

Application filed February 7 The developement pf the zylonite spectacle, frame as a substitutefor bone'and shell ias required new methodsand new, devices for bending and shaping the material to fit it'to the wearers face. Zylonite is a cellulose compound and is softened by heat, but in order to obtain the best results in bending and shaping such an article as a zylonite spectacle frame to fit the human features, the application of the heat to the various parts ofthe frame must be localized at certain parts of the frame to permit a sharp bending andshaJingatthese points, andmusa be widely distributed at'other parts of the frame which require a long, slow curving bending or shaping.

Various expcdients have been devised for this purpose. The parts of the frame to be softened have been placed in boiling water and then shaped, or they have been placed over acandlc flame, a small alcohol flame, or other crude source of heat. l'Vhere electricity has been used, it hasbeen the common practice to construct a truncated cone on a small round or. square toaster or electric grid so that the rising heated air passing through the small opening at the top of the cone may be utilized for the purpose of sof- All these expedients are open to the objection that they do not permit that combination of heat localization and heat distribution demanded by thepeculiar character and shape of the article being treated. a

To the end, therefore, of avoiding the ob jections existing in earlier types and methods while at the same time providing a heater which will combine the essentials above pointed out, I have deviscdmy present invention. According to it, the heater is constructed and arranged to permit a decidedly localized application of the heat at certain parts of the frame and a wide dis-; ribution of the heat at other partsof the frame, as conditions require.

In carrying out my invention, I construct the heater itself as a unit of double purpose and result. In one area, it is arranged to produce a thin, narrow strip of rising heated air bounded and concentrated on its edges by an ascending column of cool air carried along by the heated air. This narrow strip of heated air supplies the concentrated or localized heat as above. In another area,

5, 1928. Serial No. 86,158.

the heateris arranged on a totally different principle, namely, there is no appreciable rising column of heated air, the air being stopped from ascending into the heater by abafile plate which acts on its under face as a baffle and on its upper surface as a radiant heat reflector. In this manner, over this area of the heater, a circular or substantially circular hot area of'wide distribution is provided in which larger portions of the frame, as for instance, the rim or perhaps the curve in the bow of the spectacle frame may be evenly heated. At the juncture of these two main areas of the heater, there exists a hot spot, which results from the peculiar physical relation of the two areas to each other. This hot spot is used where a small amount of intense heat might be required to m my soften heavy parts of the frame, such as the nose-piece or the butt piece where' the temple oins the rim. These and various other features of advantage which will appear more particularly hereinafter are so cured in the heater described and illustrated in the "accompanying specification and drawings, throughout which like reference characters are employed to indicate corre sponding parts, and in the drawings:

Figs. 1 and 2 are side and plan views, respectively, of a selected embodiment of my heater which Well illustrates the principles involved. i

Fig, 3 is a section on the line 33 of Fig. 1. i

Figs. 4: and 5 are sections on the lines 4:. 4: and 55, respectively, of Fig. 2.

Fig. G is a detail view of the combined battle and reflector unit removed.

. Fig. 7 is a fragmentary plan view partitween the narrow sheet of convected heated air and the substantially circular column 01 radiant heat.

My heater comprises a base 1 and a superposed. shell 2 suitably connected thereto. The base is footed to permit a circulation of air beneath it and in use preferably rests upon a footed insulator 3 resting on the fitting table l.

In plan View, the heater shell preferably has the banjo shape shown in Fig. 2. This type of shell has pronounced advantages in that the rims or round portions oi the zylonite frames can be softened over the circular area of the shell, and the other parts of the frame can be soilitened either lengthwise or crosswise over the rectangular part 6 of the shell, the parts 5 and 6 at their juncture defining a relatively limited area which I shall designate as a hot spot 7 and where. the heat is concentrated to maximum intensity. The top of the shell is perforated, as best snown in Fig. 2, and the base of the shell is also open, as indicated at 8 and 9 in liig. el.

Mounted within the shell and suitably insulated therefrom is a coiled resistance wire Vt. As here shown, the wire 1V is carried by an insulator ol. inica or other appropriate material it), which extends tl'n'ough the elongated part (3 of the shell as a narrow strip 11 and at the cicular.

Spacing ol the wire in the coils closer or further apart depending upon whether a greater or less intensity of heat is desired at certain points.

lVithin the circular part 5 of the shell. the ends of the resistance wire are carried beneath the heads or a pair of binding screws 13 which are set through an insulated block i l mounted on the circular wall 5 of the hell, and the lead wires 15 from the currcit source are carried througl'i the base and "fastened by said screws in electrical contact with the ends of the resist ance wires.

Set within the circular shell 5, between the lower edge oi? the mica insulator 12 and the top edge ol the base 1, is a combination reflector and ballle plate 16 which is peripherally notched, as indicated at 17. The purpose oi this member 16 two-told. As a balile, it deflects the air rising through the aperture 53 and directs it through the notch l7 so that the air passes through the s called hot spot T (Fi T) existing at the juncture of the circular part 5 with. the rectangular part 6 ol the shell. As a reflector, it reflects the radiant heat thrown oil by the resistance wire at the square portion 12 of the heat unit.

The double action of the member 16 is illustrated diagrannnatically in Fig. 8 wherein the heat waves en'ianating from the resistance wire are indicated by the series of: arrows It and are shown as being reflected at B by the reflector lace of the member 10, and the action of the member 16 as a ballle is indicated by the series of arrows C. The radiant heat at this part of the shell, therefore, is increased by the heat thrown down from the resistance wire as well as that thrown upward, presenting a space wherein the radiant heat is con centrated as a substantially circulararea D.

(Fig. 10.)

In the rectangular portion (3 of the shell, be generated heat is in the form of a relnarrow ehangated strip or sheet of heated air, indicated at E, in Figs. 9 and it).

In Fig. this dianrauuna 9 l have atten'ipted to illustrate lically by the several series in this ligure, the arrows F inrisin'r currents o'l air which will be as they pass the resistance unit and 1 ica'leil by the arrows group F in Fig. l). he outside arrows (l in said ll,?,lli'( indicale currents of air rising through the base which will not be healed appreciably, but the eliect of which will be to localize the concmitration of the heated strip or sheet indicated by the arrows F, will. the currents ol air indicated by the arrows ll in Fig. 9, and which represent currents ol air coming; up over the outer edges of the rectangular part (3 oi the shell.

From the foregoing (flescription it will be e 'ident that I provide three zones of heal application, viz, the zone I) of wide distribution, which is produced by the radiant heat given oil by the resistance wire about the prared portion 12 and reflected baclc by the reflector face or? the asbestos ballle member 16, which ineinber however acts to prcvcrl' any appreciable rising column of heated air from passing: through the part 5 of the casting; the relatively inn-row. elongated zone I) of concentrated heat application which is produced by the rising cohunn of heated air bounded on edges by an ascending column of cool air carried along by the heated air: and the none or hot spot 7 ol intense heat application lying: between the zones D and E Various nmdifications in the con truction and operation of my dc ice may obviously be resorted lo, all without departing l roin the spirit of my invention it within the limitv of the appended claims,

lllil What I therefore claim and desire to secure by Letters Patent is:

1. In a heater of the class described, a frame and a hea'ting'el'ement associated therewith and constructed and arranged to supply a restricted zone of convected heat and an adjacent enlarged zone of radiant heat, there being a space intermediate of said zones constitutinga limited area of intense heat application.

2, In a heater of the class described, a base, a superposed shell presenting an enlarged areaand an adjacentrestricted area, a combination battle and reflector withi said enlarged area, and a heating element associated with said shell and effective within said enlarged area thereof to produce a zone of wide heat radiation within which the balile acts to prevent any appreciable column of rising heated air and effective withinwsaid restricted area of the shell to produce a zone of localized heat convection bounded and concentrated on its edges by an ascending column of cool air.

3. In a heater of the class described, a base, a superposed shell presenting an enlarged area and an adjacent restricted area, a combination baffle and reflector within said. enlarged area, and aheating element associ ated with said shell and effective within said enlarged area thereof to produce a zone of wide heat radiation within which the baflle acts to prevent any appreciable column of rising heated air and effective within said restricted area of the shell to produce a zone of localized heat convection bounded and concentrated on its edges by an ascending column of cool air, there being a space intermediate of said zones constituting a limited area of intense heat application.

4-. In a heater of the class described, a base, a superposed shell presenting an en larged generally circular area and an adjacent relatively narrow area, a combination baffle and reflector within said enlarged area, and a heating element associated withsaid shell and effective within said circular area thereof to produce a zone of wide heat radiation within which the baffle acts to prevent any appreciable column of rising heated air and effective within said narrow area of the shell to produce a zone of localized heat convection bounded and concentrated on its edges by an ascending column of cool air.

5. In heater of the class described, a base. a superposed shell presenting an enlarged generally circular area and an adjacent relatively narrow area, a combination battle and reflector within said enlarged area, and a heating element associated. with said shell and effective within said circular area thereof to produce a-zone of wide heat radiation within which the baiiie acts to prevent any appreciable column of rising heated air and effective within said narrow area of the shell to produce a zone of localized heat convection bounded and concentrated on its edges by an ascending column of cool air, there being a space intermediate of said bodies of heat constituting a limitedarea of intense heat application. 7

in a heater of the/class described, a base and a superposed shell presenting a generally circular area and an adjacent elon gated relatively narrow area, a heating element associated with said shell and presenting adjacent saidenlarged area a surface of wide heat dispersion and adjacent said relatively narrow area a surface of localized heat dispersion, an insulated mounting for said heating element consisting of a pair of insulating strips disposed side by side longie tudinally of said elongated area and sepa-, rated and bent upon themselves within said circular area to present an enlarged heating surface generally approximating the interior configuration of said enlargedarea of the shell.

7. In a heater of theclass described, a base and a superposed shell presenting a generally circular area and an adjacent elongated relatively narrow area, a heating element associated with said shell and presenting adjacent said enlargedarea a surface of wide heat dispersion and adjacent said relatively narrow area a surface of localized heat dispersion, said areas at their juncture defining a limited area of intense heat application, an insulated mounting for said heating element consisting of a pair of insulating strips disposed side by side longitudinally of said elongatedarea and separated and bent upon themselves within said circular area to present an enlarged heating surface generally approximating the interior configuration of said enlarged area of the shell.

8. In a heater of the class described, a base and a superposed shell presenting a generally circular area and an adjacent elongated relatively narrow area, a heating element associated with said shell and presenting adjacent said enlarged area a surface of wide heat dispersion and adjacent said relatively narrow area a surface of localized heat dispersion, said areas at their juncture defining a limited area of intense heat application, an insulated mounting for said heat ing element consisting of a pair of insulating strips disposed side by side longitudinally of said elongated area and separated and bent upon themselves within said circular area to present an enlarged heating surface generally approximating the interior configuration of said enlarged area of the shell, and a combination bafiie and deflector disposed within said enlarged area and having a cutout disposed towards said area of heat appli cation of concentrated intensity.

9. In a heater of the class described, a base and a superposed shell presenting an en larged area and an adjacent restricted area, a heating element associated With said shell, and an insulated mounting for said heating element consisting oil a pair of insulating strips disposed side by side longitudinally Within said restricted area and separated and bent upon themselves Within said enlarged area to present an en arged heating surface generally approltiinating the interior configuration oi said enlarged area of the well.

10. In a heater of the class described, a

base and a super 'iosed slell presenting an enlarged area and an adjacent restricted area, said area at their juncture defining a limited area or intense heat application, heating eleu'ient and a combination battle and deflector disposed Within said enlar ed a 'ea and having a cutout disposed towards 'd are. of heat application of concentrated intensity.

11, In a heater oi the class described, a base and a superposed shell pref ntinp' an enlarged area and an adjacent restrieti-al area, said areas at their juncture defining a limited area oil. intense heat application, 2 heating element associated with said shell.

12, In a heater ol? the cla described, 2 frame having an elongated portion and an adjacent enlarged portioin and a heating element associated with said ii ranie and presenting an elongated portion cooperating with said elongated portion oi the 'lraine to supply a restricted zone of convected heat associated with said shell,.

and presenting an adjacent enlarged portion cooperating with said enlarged portion of the frame to supply an adjacent enlarged zone of radiant heat.

3. In a heater of the class described, a frame having a narrow elongated portion ano an adjacent suhstantially circular portion, and a heating element associated with said. frame and presenting a narrow elongated portion cooperating with said elongated portion of the frame to supply a restricted Zone or coniected heat and presenting an adjacent substantially circular Pt "tion cooperatingwith said substantially circular portion ol the frame to supply an adjacent substai'itially circular zone of radiant heat and a combination bulileand reflector member within said generally circular mne.

in a heater ot' the class described, a frame having a narrow elongated portion and an adjacent substantially circular por Lion, and a heating element associated with said frame and presenting a narrow elongated portion cooperating with said elonga ed portion of the frame to supply a r ricted zone oi conrected heat and present 3; an adjacent substantially circular portion cooperating with said substantially circular portion of the frame to supply an adjacent substantially circular zone of radino heat.

in testimony whereof I atlia my signature.

EDTVARD J. OVINGTON.

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