US1468391A - Balanced oven door - Google Patents

Description

sew; 1331 923.. 1 4683% C.. B. MOSS] ET AL BALANCED OVEN DOOR Filed March 17, 1925 0 I e .1. $19 I! f l s o 15 I I fi 45 I i o i 8 1 7- 5 4 a INVENTOR &

v A TTORNE Y Patented Sept. 18, 1923.

* ewes-"seam eereerhoseiea CHARLES B.-MOSSI, oE'BEooKL N, AND HENRY ALEXANDER onEvoEA, or NEW YORK, n. Y.

EAL'ANoED OVEN noon.

Applicationfiled March 17, 1923. Serial No. 625,841.

To all whom it may concern;

Be it known that we, CHARLES Mossr and HENRY ALEXANDER CHEVOLA, eltizens of the United States, residing, respectively, in

the borough of Brooklyn, city ofNew York, county of Kings, and State of New York, and the borough of Bronx, city of New York, county of Bronx, and State of New York, have invented certain new and use ful Improvements in Balanced Oven Doors, of which the following is a specification.

Our invention relates to means for counterbalancing oven doors or ranges, stoves and the like, which doors are generally hinged or pivoted at the bottom and it is our object to provide such doors with balancing means which will hold the door firmly closed, which will not permit the door to fall in opening, and which when the door is op n will have no tendency to throw it shut and burn the arms of the baker.

In the accompanying drawing Fig. l is a face View of an oven equipped with our improved balanced door; Fig. 2 a side view of the balancing mechanism with the door in closed and Fig. 3 a like view with the door in open position. 7

The oven door 1 is pivoted at its bottom to opposed brackets 2 and 3 which are secured to the front of the range or stove.

These brackets are made in opposed pairs for each door and a description of the construction of one of them will be suflicient.

The bracket, enclosing the balance device, comprises a hollow frame 4 having a flat back 5 which back is bolted against the range front. The bracket has a bearing hole 6 through which a squared end pintle 7 on the door 1 extends from the outside to the inside of the bracket frame.

The balancing means comprises a short arm 8 with a squared opening placed on the pintle 7 and extends forwardly into the hollow bracket frame at the free end pivotally engaging a plunger 9 which telescopes into a tube 10 the end of which rests in the pocket-like abutment 12 inthe bottom of the frame 4: but which tube is free to oscillate therein. A spring 11 within the tube tends V to drive the plunger 9 outwards.

A stop 13 on the outside of the bracket 42 in the path of the descending door limits the compressing the spring-11 and oscillating V the plunger, tube and spring on the pocket 12 which acts as an abutment until the door strikes the stop 13. When this position is reached the pivotal connection between arm 8 and plunger 9 is below the axis of rotation 6 and below and inside of the center of gravity of the door so that the door will remain open indefinitely without any tendency to fly shut and injure the arms of a baker who is operating the oven.

\When the door is to be closed it is simply lifted until the center of gravity is passed when the spring will push the door tightly shut and hold it there.

By this construction the parts are few, simple and cheap to make and the efficiency of the device is not destroyed by grease getting into the working parts and causing them to slip too freely as has been the case with a large number of such devices.

It is obvious that other mechanical forms of telescoping parts and spring arrangements may be substituted for the plunger,

tube and coil spring shown without departing from our invention but the form shown is the cheapest, simplest and best now known to us.

WVe claim 1. Balancing means for doors comprising a frame adapted to pivotally carry a door, an arm, one end of which is adapted to engage a door, the free end extending outwardly, a plunger pivotally secured to the free end of the arm, a second piece co-operating withthe plunger, a spring bearing on the plunger and second piece tending to normally force them in opposite directions, said second piece being pivotally mounted on the frame.

2. Balancing means for doors comprising a frame adapted to pivotally carry a door, an arm one end of which is adapted to e11- gage a door the free end extending outthe frame to limit the downward movement wardly, a plunger pivotally secured to the of the door.

free end of the arm, a tube into which the plunger telescopes and pivotally mounted on afiixed oursignatures. 7 thelower part of the frame, a coil spring 7 7 f Within the tube tending normally to force CHARLES E. MOSSI.

the tube and plunger apart and a stop on HENR Y ALEXANDER CHE In testimony whereof We have hereunto 10

Images