US1886880A

US1886880A - Electric heating unit

Info

Publication number: US1886880A
Application number: US420673A
Authority: US
Inventors: Rene G Hare
Original assignee: Individual
Current assignee: Individual
Priority date: 1929-02-26
Filing date: 1930-01-14
Publication date: 1932-11-08
Anticipated expiration: 1949-11-08

Description

Nov. 8, 1932.

R. G. HARE ELECTRIC HEATING UNIT Original Filed Feb. 26, 1929 F .1. I" .2: F" {7 L25 9 H H O O Q 0 O Q 0 Q Inflation Rene'dflrre,

Patented Nov. 8, 1932 PATENT ()FFlfiE REN'E G. HARE, OF ARDMOB-E, PENNSYLVANIA ELECTRIC HEATING UNIT Original application filed February 26, 1929, Serial No. 342,759. Divided and this application filed January 14, 1930. Serial No. 429,673.

My invention relates to an electric heating unit adapt-ed to term the component part of a device such, for example, as a necktie press hereof, in which:

Figure 1 is a plan View illustrating an early stage in the formation of an electric eating unit embodying the main features of my present i vention;

Fig. 2 is a similar View of an intermediate stage;

Fig. 3 is a similar view of a heating unit in the -al stage of its fabrication, ready be incorporated in th apparatus in which it i d to be user, for example, a

Cum,

' an enlarged transverse sectional ting unit, the section bemg 1 of Fig. 3;

a nan view of a device used for Fig. 5 is securing the ends of the heating wires to the lead-in wires which device is also adapted '11 wires beiig shown in operal erew1th Fig. 0 i y spective view, slightly onlarge l, oii o device shown in Fig. 5, but without the 7,1 W associated therewith;

Referring to drawing, the heating unit there shown comprises preferably three sheets, 15, 16, and of asbestos or similar insulating material. Arranged between the

sheets

15 and 16 is esistance wire 18, which beginning near one of the corners, extends preferably lo (finally back and forth,

ends another corner.

The

sheets

15 and 16 are united to each other by means of a suitable cement 19, such water or s' -icato of soda solution, in which the w re 18 is imbedded when the same sets. The

sheets

16 and 17 are also united to each other by a cement 20, in a similar manner.

The sheet 16 is preferably made shorter than the

sheets

15 and 17 so as to provide apock t in which a member 21, preferably made of a sleet of vulcanized fibre or the like, is positioned. The member 21 is pr0- vioed near its central portion with two holes and 23; also two holes 24; and 25, located short distances from the

holes

22 and 28 respectively. The member 21 is also provided near its respective end portions with struck up tabs or

tongues

26 and 27.

The electrical. energy for heating the unit 05 is supplied by a suitable cable 28, comprising a pair of insulated wires 30 and 31. The wire 30 extends through the hole 22, from one face to the other of the member 21, thence through the other hole 24, beyond which the insulation is removed, and the wire bent back in hook-like form as at 32.

In like manner, the wire 31 extends through the

holes

23 and 25 of the member 21,

and likewise has the insulation removed" and is then wrapped or coiled around the bared and hook-like end of the wire 30. In like manner, the other end of the resistance wire extends under the tab or tongue 27 of the member 21, and is similarly oined to the barod and hook-like end of the wire 31.

The member 21, and the wire ends associated therewith hereinbefore set forth, are imbodded in the cement which secures the same in place in the pocket between the ends of

tie sheets

15 and 17, said pocket being" provided by reason of the sheet 16 being shorter than the

sheets

15 and 17.

In fabricating the heating unit the sheet 15 is first placed upon a suitable table, such, for example, as that of the machine of my invention, described in my application for Letters P21139111, filed February 26, 1929, Serial No. 342,759, of which this application is a division, being located by means of two groups of pins, one group 35 penetrating the sheet near one end thereof, and the other group 36 penetrating the sheet near the other end thereof.

The resistance wire 18 being secured at one end to a suitable clamping post 37, is then arranged on top of the sheet by means of the two groups of pins 35 and 36, extending longitudinally back and forth over said sheet 15, and around said pins 35 and 36, and finally being secured to another clamping post 38 (see Fig. 1).

The sheet, with the wire arranged thereon as above described, is now coated with a suitable cement, such as water glass or the like. The sheet 16 is then placed over the sheet 15 with the wires and cement thereon, and is clamped against the same, the pins 85 and 36 penetrating the sheet 16, and the parts being held clamped together until the cement sets.

As before noted, the sheet 16 is somewhat shorter in length than the sheet 15, and in the space thus provided the member 21, with the ends of the wires 30 and 31 secured therein as hereinbefore described, is placed in position upon the end of the sheet 15 which projects beyond the end of the sheet 16.

The ends of the heating wire 18, being re leased from the clamping posts 37 and 38, are brought under the respective struck up

portions

26 and 27, after which they are coiled around the bared hook-like ends of the wires 30 and 31,130 establish an electrical connection therewith.

The pins 35 and 36 having meanwhile been withdrawn, the exposed surface of the sheet 16, as well as the member 21 and the parts associated therewith, are coated with the cement, after which the sheet 17 is placed thereon and clamped in position until the cement sets. The heating unit, after the cement has set, isthen ready for incorporation in the article (such as a necktie press or the like) in which it is to be used.

It will be seen that there is thus provided an electric heating unit of novel construction and arrangement, which may be readily and expeditiously made at a minimum of expense.

It will, of course, be understood that various changes and modifications may be made without departing from the spirit of my invention.

Having thus described the nature and characteristic features of my invention, what I claim as new and desire to secure by Letters Patent, is:

1. An electric heating unit comprising three thin flat rigid sheets of insulating ma terial cemented to each other, a resistance wire extending back and forth between two of said sheets and held in place by the cement which holds said sheets together, the intermediate sheet of the heating unit being'shorter than the outer sheets to provide a pocket thered between, lead-in wires, a device for securing said lead-in wires cemented in place in the pocket aforesaid, the ends of the resistance wire being secured to the ends of the lead-in wires, and the end portions of the wires being imbedded in the cement by which the device for securing the lead-in wires is held in place.

2. An electric heating unit comprising three thin flat rigid sheets of insulating material cemented to each other, a resistance wire extending back and forth between two of said sheets and held in place by the cement which holds said sheets together, the intermediate sheet of the heating unit being shorter than the outer sheets to provide a pocket therebetween, lead-in wires, a device for securing said lead-in wires comprising a strip of insulating material cemented in place in the pocket aforesaid, said strip having a plurality of holes through which the lead-in wires extend, the ends of the resistance wire being secured to the ends of the'lead-in wires, and the portions of the wires associated with the strip being imbedded in the cement by which the strip is held in place. i

3. An electric heating unit comprising three thin fiat rigid sheets of insulating material cemented to each other, a resistance wire extending back and forth between two of said sheets and held in place by the cement which holds said sheets together, the intermediate sheet of the heating unit being shorter than the outer sheets to provide a pocket therebetween, lead-in wires, a device for securing said lead-in wires comprising a strip of insulating material cemented in place in the pocket aforesaid, said strip having a plurality of holes through which the lead-in wires extend, said strip having tongue portions for confining the resistance wire near the ends thereof, the ends of the resistance wire being secured to the ends of the lead-in wires, and the portions of the wires associated with the strip being imbedded in the cement by which the strip is held in place:

In testimony whereof, I have hereunto signed my name.

RENE G. HARE.