US1117132A - Range. - Google Patents

Description

H. E. JANES.

RANGE.

APPLICATION FILED JULY 9, 1914.

1, 1 1 '7., 1 32., Patented Nov. 10, 1914.

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N J NWN 'l L 11/ y By NVE/WOR f TRNEYS UNITED srarns rA'rnN'r OFFICE.

HENRY n. JANns, or NEW YORK, N. Y.

RANGE.

To all whom t may concern Be 1t known that 1, HENRY E. JANEs, a

citizen of the United States, residing in the borough of Manhattan of the city of New York, in the State of New York, have 1nvented certain new and useful Improvel ments in Ranges, of which the following is ka specification, reference being had to the accompanying drawings, forming a part hereof.

The desirability of drop doors for the ovens of ranges, that is, of doors which are hinged along the lower edge and swing It is necessary, of course, to counterbalance the door in some way, either by springs or by counterweights, but when springs are employed, it is not practicable under the conditions imposed, either to counterbalance the doors properly at all points in their movement, or to provide proper checks, and moreover, after a period of use, the springs themselves are apt to break, so that the consequence is that sooner or later the doors are subjected to shocks in opening and breakages occur. Similar dihculties have also been experienced in the use of counterweights, with which, on account ofthe limitations of space, it has been practically impossible to counterbalance the doors prop-` erly at all points in their movement.

It is the object of the present invention to overcome the difficulties which have existed hitherto in the proper counterbalancing of drop doors and have practically prevented the general use of such doors and t0 provide such a construction in every way practicable,

4as will provide for a proper counterbalanc-v ing of the door throughout its movement,

and for the prevention of shocks.

In accordance with the invention, the increasing leverage of the weight of the door, as it swings from a vertical position to a horizontal position, is itself made to increase the resistance to the rapid movement of the door, so that it is practically impossible for Speccation of Letters Patent.`

.bracket c3.

Patented Nov. 1o, 1914.

Application filed July 9, 1914. Serial No. 849,912.

the doorto be stopped in its eXtreme open position with such a shock asis likely to cause breakage.

The invention will be more fully explained hereinafter with reference to the accompanying drawing in which it is illustrated and in which- Figure l is al view Vin vertical section showing so muchofuan ordinary range as is necessary to enable the application ofthe invention thereto tobe understood. Fig. 2 is a partial view of the same in front elevation partly broken away.

ln both Figs. land 2 the door is represented by full lines in its closed position and in Fig. 1 the positions assumed by the door and its connected parts when the door is opened to the full extent, are represented by dotted lines. y

The range to which the'improvement is applied may be of any suitable construction.

As shown in yFig. l, it may comprise the' usual upper part or body a and base b. Within the latter may be provided, as usual, awarming oven.v The main-oven door c is provided aty its lower edge with pintles c, (only one of which is shown) which are recured to or forming part ofthe front of the range. The pintles c may lbe formed `and secured to the oven door in the usual manner, and it will be understood upon ,reference to the drawings, how readily breakage of pintles might occur. To the door c, near each vertical edge thereof, is secured ,a Each bracket c3 is engaged by the head CZ of a rod or link d which Ahas at its lower end a cross-pinor headdz. f vThe latter engages a preferably slottedand vertically movable block e which is arranged to slide verticallyon the front wall b of the ybase b. Such lfront wall is slotted ver- `ceived in bearing brackets o2 suitably setically as-at o?, so as to guide the block e in its movements. rlhe block e'may be composed of the outer slotted plate or bracket e, the inner lever-engaging plate e2, a spacing block e3, which travels in the slot b2, and a bolt e4 by which the other parts are united. llithin the warming oven in the base o at each end thereof, is mounted 'a counterbalancing lever f, the front end of which engages the lip @5 of the lever-engaging plate b2. The two levers f carry at blocks e.

their rear ends the single counterweight f which alsoacts as a bar to connect the two counterbalance levers f.

With the parts in the positions shown in full lines in Figs. l and 2, the door c being closed, it will be seen that after the door has been lifted slightly to free it from the detent, and is swung outwardly, the vertical slots of the block c permit the first part of the swinging movement of the door to be accomplished without any downward movement of the link or arm CZ which simply swings outwardly upon its pivot cl2. 1i/l/hen, however, the door has been swung outwardly and downwardly for a large extent of movement, the heads cl2 bear upon the sliding blocks c and cause them to be moved downwardly, the weight of the door being then counterbalanced by the counterweights f through levers 1t will now be understood that as the door swings out sufliciently to cause the heads cl2 to bear against block e, a considerable and always increasing thrust is transmitted through the rods d against the face plate e of the sliding This thrust causes the face plates Vto bear more closely against the front plate b of the warming oven, at each side of the slot b2, so that the friction between the face plate e and the plate b is constantly increased as the door approaches the horizonrtal position shown by dotted lines in Fig. 1, and the resistance to the movement of the door is therefore increased, reaching its maximum as the door reaches the horizontal position. Therefore, in the opening movement of the door, the increasing leverage of the door is compensated for and the action of the counterweight f is assisted by the increasing friction of the face plate c against the front plate ZJ of the warming oven. 1t is therefore impossible for the oven door, even if the support of the hand is withdrawn, to reach its extreme open position with a shock. 1n the closing of the door, the application of the lifting force to the outer edge of the door immediately relieves the friction of the sliding block against the front plate and permits the counterweight to act with its full force to assist the closing movement of the door, the friction of the rear plate e2 against the rear of the front plate b, being practically m'Z.

It will be understood that the arrangement, form and proportions of the parts will be varied to suit different conditions of use and that the invention, therefore, is not limited to the precise construction shown and described herein.

l claim as my invention:

1. In a range or the like, the combination of a door hinged at its lower edge, a vertically movable friction block, a support therefor, a rod in operative engagement with the door and the friction block and through which the thrust of the door is transmitted to the block and the friction thereof is increased as the door is swung from a vertical to a horizontal position, and means to counterbalance the door in its movements.

2. 1n a range or the like, the combination of a door hinged at its lower edge, a vertically movable friction block, a support therefor, a rod in operative engagement with the door and the friction block and through which the thrust of the door is transmitted to the block and the friction thereof is increased as the door is swung from a vertical to a horizontal position, and a counterbalancing lever engaging the frictional block to oppose the swinging of the door from a vertical to a horizontal position.

3. In a range having a body and a base, the combination of a door hinged at its lower edge to the body, a friction block guided for vertical movement on the front plate of the base, a thrust rod in operative engagement with the door and the friction block, and a counterbalancing lever in operative engagement with the friction block.

t. 1n a range having a body and a base, the combination of a door hinged at its lower edge to the body, a friction block guided for vertical movement on the front plate of the base, a thrust rod in operative engagement with the door and the friction block, and a counterbalancing lever in operative engagement with the friction block, the friction block having a slotted bracket for engagement with the corresponding end of the thrust rod.

This specilication signed and witnessed this sixth day of July, A. D. 1914.

HENRY E. JANES.

TWitnesses:

HAROLD A. l-lAzLETT, HARRY HnnnNBnRe.

Gopies of this patent may be obtained for ve cents each, by addressing the Commissioner o1 Patents,

Washington, D. C.

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