US1824345A

US1824345A - Stove door

Info

Publication number: US1824345A
Application number: US456638A
Authority: US
Inventors: Christopher L Hardwick
Original assignee: Hardwick Stove Co
Current assignee: Hardwick Stove Co
Priority date: 1930-05-28
Filing date: 1930-05-28
Publication date: 1931-09-22
Anticipated expiration: 1948-09-22

Description

Sept. 22, 1931.

C. L. HARPWICK STOVE DOOR Filed May 28, 1930 2 Sheets-Sheet l C. L Mwick.

Sept. 22, 1931. c. L. HARDWICK STOVE DOOR Filed may 8. 1950 2 sheets-Sheet 2 Patented Sept. 22, 1931 UNITED STATES PATENT OFFICE CHRISTOPHER L. HARDWICK, OF CLEVELAND, TENNESSEE, ASSIGNOB TO HARDWICK STOVE COMPANY, OF CLEVELAND, TENNESSEE, A FIRM COMPOSED OF CHRISTOPHER HARDWICLK AND MRS. J. H. HAEDWICK s'rovn DOOR Application filed May 28,

This invention has reference to oven doors and relates particularly to the construct on thereof whereby the presence of fastening devices on the outer side of the door is avoided. The invention seeks to provide a structure in which the handle will be secured in place by fasteners inserted through the inner or back plate of the door and the back plate will be reinforced against buckling under pressure from the fastenings. The in- 'vention also seeks to provide a simple and inexpensive construction whereby the end portions of the door will be reinforced and a simple and convenient hinge mounting w ll be provided. The invention is illustrated in the accompanying drawings and will be hereinafter first fully described andthen more particularly defined in the appended claims.

In the drawings:

Figure 1 is a front elevation of a door embodying the invention,

Fig. 2 is a rear elevation with the back plate partly broken away and partly in section,

Fig. 3 is a longitudinal section on the line 3-3 of Fig. 2,

Fig. 4 is an enlarged transverse section on the line 4--4 of Fig. 2,

Fig. 5 is a longitudinal section through the handle, and

Fig. 6 is an enlarged detail perspective view of one of the corner reinforcements.

In carrying out the present invention, there is provided a front plate 1 of sheet metal which is slightly arched to have an attractive form and a back plate 2 which is also of sheet metal and of corresponding contour but is flat through its area. The edge portions of the front plate are turned backward to form flanges, indicated at 3, and the edge portions of the back plate are turned forward to formflanges, indicated at 4, which will fit closely within the flanges 3 of the front late. The flange 3 at the lower edge of the ront plate is provided with upstanding lips 5 at intervals in its length so that there is presented a trough within which the lower edge of the back plate may fit. In assembling the plates, the lower edge of the 1930. Serial 110. 456,638.

The handle 7 is of the usual form employed in oven door handles and is provided at its ends with lugs 8 arranged to pass through openings 9 in the front plate and having threaded sockets 10 formed therein, the handle being shaped to provide shoulders 11 around the bases of the respective lugs which bear against the front plate 1 and thereby limit the extent to which the lugs may be inserted. Fastening bolts 12 are engaged in the sockets 10, being inserted through openings provided therefor in the back plate -in'alinement with the sockets and a brace 13 is disposed between the front and back plates and is in the form of a U-shaped bridge having its arch bearing against the back plate and its legs or side portions bearing against the front plate, the arch or shoulder having openings formed therethrough to permit the insertion of the bolts 12, as will be understood. The provision of this brace 13 effectually reinforces the front and back plates against buckling under the stress imposed thereon by the fastening bolts.

In the ends and lower corners of the door are provided brackets 14 which effectually reinforce the corners ofthe door and provide a strong and inexpensive support for the trunnions or hinge pins 15. These brackets are also constructed of sheet metal and each comprises a base 16 of substantially inner longside of the bracket is formed with a flange 20 which pro ects forward to bear against the front plate and converges upwardly toward the flange 17 as Wlll be understood upon reference to Fig. 2. The short side of the bracket will be disposed adjacent the lower edges of the front and back plates and is rolled to form a hp 21 and a groove 22 with a shoulder or stop 23 at the innerend of the groove while the outer end thereof is open, as shown in Fig. 6. The bracket is secured in place by short bolts 24 inserted through the

end flanges

3 and 4 of the front and back plates and the flange 17 of the bracket, as shown in Figs. 2 and 3, and an opening 25 is formed through the-flange 17 adjacent the lower end thereof and in alinement with the groove 22 to permit the hinge pin or tunnions 15 to be inserted endwise into the groove and abut the stop 23, the trunnion assing through the opening 6, as will be un erstood upon reference to Fig. 2. The hinge pin or trunnion is of such length that when it has been inserted in place and is bearing against the stop 23, the outer end ortion will project beyond the end of the oor in position to engage a socket or other cooperating member in or on the door frame. The flange 17 of the bracket is also constructed with an extension 26 having an opening 27 in its outer extremity which is shaped to define shoulders 28 adapted to engage lugs or projections on the door frame whereby the opening and closing movement of the door will be limited to avoid slamming or forcible impact of the door against the frame, the opening 27 being intended to receive one end of a retractile spring which has its opposite end secured within the wall of the oven so that, when the oven door has been opened and its closing is desired, a slight push upon the door will be suflicient to initiate the .closing "-rinovement, and the closing will be completed b the action of the spring. One of the stop s oulders 28 is so disposed that it will bring theopening movement of the door to a stop when the door has reached a horizontal position.

From the foregoing description, taken in connection with the accompanying drawings, it will be seen that I have provided an exceedingly simple and inexpensive structure whereb an oven door will be thoroughly rein orced and the. cost of production will be minimized. The corner brackets may be very easily stam ed out of sheet metal and placed in position between the front and back plates of the door. After the brackets have been placed in position and the back plate rocked into proper relation to the front plate the hinge pin 15 is inserted endwise into the groove 22 of the bracket so that the assembly will be complete. The bracket will be secured in place ,be understood. The bracing bridge 13 is disposed between the front and back plates and may be held in position temporarily by pins inserted through the front plate while the corner brackets and the back plate are being secured. The pins or other holding devices may then be shifted to the back plate while the handle 7 is being fitted to the front plate after which the fastening bolts will be inserted and turned home.

Having thus described the invention, I claim:

1. In an oven door, a front plate having flanges around its edges, a back plate having flanges to fit against the inner sides of the flanges on the front plate, reinforcin brackets of sheet material fitted between t 1e front and back plates at the lower corners thereof and provided along their side edges with flanges in contact with both the front and the back plates and further provided at their lower ends with hinge-supporting elements, hinge pins inserted through the end flanges of the front and back plates and resting in said hinge-supporting elements, and a fastening bolt inserted through the end flanges of the front and back plates and through the adjacent side flange of the respective bracket.

2. In an oven door, front'and back plates having marginal flanges, a corner bracket having a side flange bearing against the end flange of the back plate, a fastenin bolt inserted through said flange and the flanges of the front and back plates, the corner bracket having its inner side converging upwardly toward its outer side and provided with an upstanding flange extending, between and bearing against the front and back plates, and a hinge pin carried by said bracket and rojectin through the end portions of the ront and ack plates.

3. In an oven door, front and back plates secured together at their ends, corner brackets fitted between said plates and each consisting of a basal portion bearing against the back plate with its side edges converging toward the free edges of the front and back plates, the inner side edge of the bracket being formed with a flange extending to the front plate and the outer side edge portion of the bracket being bent forwardly to bear against the front late and constructed with a flange exten ing to the back plate, and means at the lower end of the bracket to support a hinge pin.

4. A corner bracket for oven doors having a basal portion adapted to bear against the back plate of the oven door and havextend between and brace the front and back lates of the door, the lower end of the bracket being rolled to define a groove and a stop at the inner end of the groove w ereby a hinge pin may be supported by the bracket.

5. In an oven door, front and back plates having marginal flanges, corner brackets disposed between and secured at their outer sides to the front and back plates, the lower ends of the brackets being rolled to define grooves, and a stop closing the inner end,

of the respective groove, and a hinge pin inserted endwise into said groove with its inner end bearing against said stop.

6. In an oven door, front and back plates secured together at their ends, corner brackets disposed between the front and back plates and secured thereto at the ends of the same, said brackets having flanges along their side edges extendin between the front and back plates to rein orce the same and provided at their lower ends with grooves alined with openings in the ends of the front and back plates, stops at the inner ends of the respective grooves, and hinge pins inserted through the ends of the front and back plates to rest in the respective grooves and bear against said stops, the brackets having extensions projecting through the marginal portions of the front and back plates at a right angle to the hinge pins and provided at their extremities with stop shoulders and constructed to be engaged with a retracting spring.

In testimony whereof I affix my signature.

CHRISTOPHER L. HARDWICK. [1a. 9.]