US2234259A

US2234259A - Door construction

Info

Publication number: US2234259A
Application number: US252330A
Authority: US
Inventors: William D Kelly
Original assignee: Stewart Warner Corp
Current assignee: Stewart Warner Corp
Priority date: 1939-01-23
Filing date: 1939-01-23
Publication date: 1941-03-11
Anticipated expiration: 1958-03-11

Description

March 11, 1941. I w, KE L 2,234,259

DOOR CONSTRUCTION Filed Jan. 23,1939, 2 Sheets-Sheet 1 ATTORNEYS.

March 11, 1941. w. D. KELLY 2,234,259

DOOR CONSTRUCTION Filed Jan. 25, 1939 2 Sheets-Shee t 2 Gog n N lllllllllllllllil' v mom L9 Wallz avrz l7 ATTORNEY5.

Patented Mar. 11,1941

William D. Kelly, Western Springs, 111., assignor to Stewart-Warner Corporation, Chicago,v 11]., a corporation of Virginia Application January as, 1939, Serial'No. 252,330

6 Claims.

The present invention relates to a new and improved door construction and more particularly to a construction of means for guiding and controlling the opening and closing movement or I the like;

My invention may be used with any door construction but is particularly adapted for use with doors of stoves or refrigerators or other units having doors of considerable thickness. In such units it is often desirable for reasons of design that'the edges of adjacent doors be in close proximity. This may be desired merely for appearance or in order'to provide a minimum of fixed structure between adjacent openings. One specific application of the invention is in connection with a stove oven door which is located immediately above a grill door, the oven door swinging down from the top.

It is an object of the present invention to provide anew and improved door construction for swinging doors.

It is a further object to provide a door supporting structure for controlling the swinging movement of doors with particular reference to 25 the movement of that'edge ofthe door maintained adjacent the'fixed structure to which the door is secured.

It is an additional object to provide a structure of this character adapted for use with doors 30 of substantial thickness used adjacent similar doors or set into the fixed structure.

It is also an object to provide a construction which is simple in design, composed oi. but few parts and adapted for commercial production and 35 use.

Other and further objects will description proceeds.

I have shown a preferred embodiment of my invention in the accompanying drawings in which- Figure 1 is a fragmentary vertical elevation showing the construction with the parts in closed appear as the position in full lines and in open position in broken lines; Figure 2 is a'plan view of the construction;

and r Figure 3 is a vertical section taken on line 33 of Figure 1. I

The supporting stove structure is shown gen- 50 erally at II, and a lower door 12 is shown, this door being mounted in any suitable manner and closing a chamber below the oven which is closed bythe door construction shown in detail herein. The oven door It is provided with the inner wall I4 and the intumed edge I! located adja- ,cent the face ii of the oven structure. The fixed guide or cam arm I l is secured to the lateral edge wall l8 of the door by means of the machine'screws It This arm has an arcuate portion 20 extending between the upper stop roller 5 2| and the lower guide roller 22, this arm being formed with upper and lower cam surfaces engaging the two rollers. The arm I! is further provided withthe hooked portion 23 adapted to engage the stop roller 2| with the parts in open 10 position as indicated in broken lines in Figure 1. The rear face of the hooked portion 23 of the arm I! -is provided with the

opposed cam surfaces

24 and 25. These are adapted to engage the latch rollers 26. These rollers 26 are carried 15 by the latch slide 21 which passes through the slide holder 28 and is held in-position by pin 29 passing through the end of the member 21. The compression spring 30 is fitted around the member 21 and bears against the shoulder 3| so v as to normally thrust the latch rollers forwardly toward the door. The hook link 32 has a fixed pivot 33 upon the oven side wall and its opposite end is provided with the pivot 34 securedto the lateral edge wall I 8 of the door at the point adjacent its lower edge.

As best shown in Figures 2 and 3, the guide roller 22 is provided upon each side with the

washers

35 and 36 so as to maintain the arm' I! in bearing'relation upon the roller. The roller and washers are supported on the pivot 31 and are held in place by the U-pin 38 which is snapped into place in a groove in the supporting pivot. The stop roller 2! is also supported on a pivot 39 carried by the oven wall, and the roller is held on the pivot by a U-pin 40 snapped upon the pivot. As will be apparent from Figures 2 and 3, the door is preferably provided with these guide arms and hook. linkconnections at both sides of the door. The parts are duplicates and 40 the supporting pivots merely extend in opposit directions from the oven wall.

The position of the parts in the open and closed position is clearly shown in Figure 1. With the -parts in the closed position, as shown in full lines, when the upper edge of the door I3 is pulled to the left to open it,- the arms H, which are rigidly fixed to the door, move over the guide rollers 22 and this causes the door to lift, due -to the fact that the lower edge of the arcuate portion 20 of the arm 11 is not on a circular arc having the lower edge of the door for a center, but on a curve having centers spaced farther away from the arm than the lower edge of the door. As the door is swung forward, the

, of the stove construction.

roller 22,- cause the lower edge to swing upwardly so that it fully clears the upper edge of the lower adjacent door l2. The stop roller 2| in addition to serving as a stop in the final open position, alsopreventsthe arm H from lifting off the roller 22 in the earlier stages of the opening movement. The upper edge of the arcuate vportion 20 of the arm H H such as to maintain contact with the roller 2| is formed upon a curve throughout the opening and' closing-movement of the door. h

It will be apparent that the first portion of the opening movement is resisted by the engagement of the latch roller 26 against the cam surface 24. The roller rises onthis cam, however,

compressing the spring 36, and as the roller passes over the point between

cam surfaces

24 and 25, the door is released forfree opening movement. When the door is swung in the reverse direction the parts take a reverse movement,.the arms I'l being guided by the rollers 2| and 22. 'As thedoor approaches closed position the cam surface 25 thrusts the latch rollers 26 against the springs 30 and the springs are compressed until the rollers 26 pass over against the cam surface 24, when compression is only partially released so that the springs and rollers serve to hold the door firmly in closed position.

The combined swinging and lifting movement imparted to the lower edge of the door by its linked connection to the oven permitsthis lower edge to be located closely adjacent other portions of the stovewhich project outwardly as far as the outer face of the door. a The adjacent portions may be a similar door to a broiler or warmingoven or the like, or may be' a fixed portion It will lie-understood that the doors of modern types of stoves are of substantial thickness to permit of the door being provided with insulation.

While I have shown one preferred form of construction by way of example, the device may be modified to meet varying conditions and requirements and I contemplate such changes and variations as come within the spirit and scope of the appended claims.

I claim: p

1. Support construction for swinging doors comprising a link pivotally connected to the door adjacent one edge thereof and connected to fixed door supporting structure, a guide arm rigidly connected 'to an intermediate portion of the door, and guide means associated with the lower side of the arm for lifting movement of the arm and door during the opening of the door.

2. Support construction for swinging doors comprising a link pivotally connected to the door adjacent 'one edge thereof and connected to fixed door supporting structure, a guide arm rigidly connected to an intermediate portion of the door said armhaving cam portions on the lower side thereof, and guide means associated with the cam portions of the arm for lifting movement of the armand door during the opening of the door.

3. Support construction for swinging doors comprising a, link pivotally connected to the door adjacent one edge thereof and connected to fixed door supporting structure, a guide arm rigidly connected to an intermediate portion of the door, cam surfaces upon upper and lower edges of the arm, and fixed guide means engaging said cam surfaces for lifting and limiting movement of the door during the opening of the door.

4. Support construction for swinging doors of substantial thickness, comprising a link pivotally connected at one end to the door atva point adjacent but spaced from an edge and the irmer face of the door and connected at the other end to fixed door supporting structure, a guide arm rigidly connected to an intermediate portion of the door, and guide means associated with the arm for guiding movement of the arm and door to cause the edge of the door adjacent the link connection to'have a lifting and swinging movement.

5. Support construction for swinging doors of substantial thickness, comprising a link pivotally connected at one end to the door at a point adjacent but spaced from an edge and the inner face of the door and connected at the other endto fixed door supporting structure, a guide arm rigidly connected to an intermediate portion of the door, said arm having upper and lower cam surfaces, and guide rollers associated with the arm engaging the upper and lower cam surfaces for guiding movement of the arm and door to cause the edge of the door adjacent the link connection to have a lifting and swinging movement. 6. Support construction for swinging doors of substantial thickness, comprising a link pivotally' connected at one end to the door at a point adjacent but spaced from an edge and the inner face of the door and connected at the other end to fixed door supporting structure, a guide arm rigidly connected to an intermediate portion of the door, oppositely inclined cam surfaces on the free end of the arm, spring latch means engaging said surfaces, and guide means associated with the arm for guiding movement of the arm and door to cause the edge of the door adjacent the link connection to have a lifting and swinging movement.

" WILLIAM D. KELLY.