US 3057343 A
Description (OCR text may contain errors)
Oct. 9, 1962 w. N. NELSON ETAL 3,057,343
WALL OVEN I Filed Oct. 9, 1959 HUI v A z a? r. L g
' zzzz'w' zygfaz/eo Patented Oct. 9, 1 962 free 3,057,343 WALL (EVEN Willis N. Nelson and Arthur W. Oherbcck. Wisconsin Rapids, Wis., assignors to Preway, Inc, a corporation of Wisconsin Filed Oct. 9, 1959, Ser. No. 845,467 3 Claims. (Cl. 126-273) This invention relates to a built-in wall oven and more particularly to such an oven having structure for centering and locking the oven in place.
An object of this invention is to provide a new and improved built-in wall oven with centering and locking structure.
Another object of this invention is to provide a built-in wall oven having structure permanently associated there with which in a retracted position does not hinder placing the oven through an opening into a mounting cavity and which may be extended to center and lock the oven in place by manually operable means operated from within the oven.
Further objects and advantages will become apparent from the following detailed description taken in connection with the accompanying drawings in which:
FIG. 1 is a vertical side elevation of the built-in wall oven shown in place in a cavity with the cavity defining walls shown in section;
FIG. 2 is a fragmentary plan view of the wall oven shown in place behind the front wall which in part defines the oven receiving cavity;
FIG. 3 is a horizontal section on an enlarged scale taken generally along the line 3-3 in FIG. 1; and
FIG. 4 is a vertical section taken generally along the line 44 in FIG. 3.
While this invention is susceptible of embodiments in many different forms, there is shown in the drawings and will herein be described in detail an embodiment of the invention with the understanding that the present disclosure is to be considered as an exemplification of the principles of the invention and is not intended to limit the invention to the embodiment illustrated. The scope of the invention will be pointed out in the appended claims.
As shown in the drawings the built-in wall oven, indicated generally at 10, is mounted within a cavity having a bottom panel 10, a top panel 11 and a rear panel 12 with a front wall 13. This cavity may be formed structurally into a building or may be formed in a suitable cabinet which is positioned in a kitchen or the like. The front wall 13 has an opening 14 therein of a size somewhat larger than the dimensions of the oven whereby the oven may be positioned within the cavity with an oven front panel 15 positioned against the outer face of the front wall 13.
The oven 10 has a bottom wall and a top 21 with side Walls 22 and 23 and rear wall 24 extending vertically jg therebetween. The oven bottom wall 20 has means for supporting the oven within the cavity comprising support legs 25 and 26 at each side of the oven which rest upon the cavity bottom panel 10.
It is necessary to lock the oven in place within the cavity to prevent outward movement from vibration or continual opening and closing of the oven door and structure integral with the oven is provided for this purpose. The locking means comprises a pair of identical units, each indicated generally at 30, associated one with each of the oven side walls 22 and 23. The locking means 30 associated with the side wall 23 is shown in detail in FIGS. 3 and 4 and comprises a generally U-shaped bracket 31 mounted interiorly of the oven and in an opening 32 in the oven side wall 23. This bracket has a pair of flanges 33 and 34 which are atttached to the oven side wall 23 by bolts 35 and 36. The bracket 31 mounts a U-shaped lock member having vertically spaced legs 37 and 38 and is guided for in and out movement by a guide plate 39 also attached to the side wall 23 of the oven by the bolts 35 and 36.
Means for operating the lock member comprises a rotatable threaded member 40 which is loosely mounted in an opening (not shown) in a base 41 of the U-shaped bracket 31 and an opening (not shown) in the guide plate 39. The threaded member 40 has a slotted head 42 disposed interiorly of the bracket base 41 for access from within the interior of the oven through an opening 43 in an oven interior wall 44. This opening 43 may be closed by a plug button 45 which is easily removed from the opening to permit insertion of a tool, such as a screw driver, into the opening into engagement with the head 42 of the threaded member 40. The threaded member 49 is held in position by the head 42 as well as a nut 46 attached to the opposite end of the threaded member and secured thereto by suitable means such as welding. The threaded member 49 threadably engaged a threaded nut 47 attached to the lock member whereby rotation of the threaded member 40 will result in linear movement of the lock member.
A spacer plate 54 is attached to the side wall of the oven and substantially encloses the oven locking structure.
The front edges of the lock member legs 37 and 38 are each provided with a sloped cam surface 51 which tapers toward the free end of the leg for a purpose more fully described hereinafter.
When the built-in oven is shipped the integral lock members are retracted to have the legs 37 and 38 thereof disposed substantially entirely within the spacer plates 50 and the oven is inserted through the front wall opening 14 without interference from the lock members. An installer then removes the plug buttons 45 to expose the openings 43 in the inner oven walls 44. The threaded members 49 are then rotated by use of a screw driver and this rotation gradually shifts the lock members outwardly away from the oven side walls until the cam surfaces 51 engage the rear of the front wall 13. The shift of the lock members outwardly is done progressively and alternately at each side whereby the cam surfaces 51 are caused to center the oven within the cavity. With the lock members projected as shown in FIG. 3 the oven is then locked against movement out of the cavity and the plugs 45 may be replaced.
In addition to centering the oven, the cam surfaces 51 on the lock members also compensate for slightly different widths of the opening 14 in the front wall 13 as well as different thicknesses of the front wall 14 to enable centering and secure locking of the oven in place under varying conditions as found in the actual installation.
1. A wall oven of the built-in type for placement within a cavity having a front wall with an opening, said oven having a casing with a bottom wall and a pair of upstanding side walls, means associated with each side wall for centering and locking the oven in place in said cavity comprising, a U-shaped bracket attached to the side wall and positioned generally interiorly of the side wall in an opening therein with the U-shape opening toward the outside of the casing, a U-shaped lock member movably mounted relative to said bracket and having vertically spaced legs spanning to a guide plate attached to the bracket, a threaded member rotatably fixed to said bracket and threadably attached to said lock member and having an actuable end exposed at the bracket base interiorly of the side wall, said lock member legs having their front edges formed as sloped cam surfaces tapering toward their ends whereby the lock members are positioned sub- 3 stantially within the oven casing as the casing is placed in said cavity and are then projected to positions whereby the cam surfaces are adapted to engage the front wall to center and lock the oven casing in place.
2. A built-in wall oven for placement within a cavity having a front wall with an opening permitting insertion of the oven, said oven having a casing with a pair of upstanding side Walls, means associated with each side wall for centering and locking the oven in place in said cavity comprising, a bracket attached to the side wall and positioned interiorly of the side wall, a U-shaped lock member movably mounted relative to said bracket and having vertically spaced legs, and a threaded member r0- tatably fixed to said bracket and threadably attached to said lock member and having an actuable end exposed interiorly of the side wall, said lock member legs having their front edges formed as sloped cam surfaces tapering toward their ends whereby the cam surfaces are adapted to engage the rear side of the front Wall to center and lock the oven casing upon movement thereof outwardly of the oven casing.
3. An oven centering and locking device comprising, a U-shaped bracket for attachment to the side wall of an oven, a U-shaped lock member movably mounted relative to said bracket and having spaced legs spanning a guide plate attached to the bracket, a threaded member rotatably fixed to said bracket and threadably attached to said lock member and having an actuable end exposed at the bracket base, said lock member legs having edges formed as sloped cam surfaces tapering toward their ends for selective engagement with a wall surrounding the oven to center and lock an oven casing in place.
References Cited in the file of this patent UNITED STATES PATENTS 1,336,058 Wilson Apr. 5, 1920 2,512,188 Wait et a1. June 20, 1950 2,672,390 Blashfield Mar. 16, 1954 2,739,584 Hupp Mar. 27, 1956 2,831,955 Sheidler Apr. 22, 1958 2,921,576 Nolan Jan. 19, 1960 2,955,891 McDonnold Oct. 11, 1960