US642947A - Door-check. - Google Patents

Description

Patented Feb. 6, 1900.- J. L. ZESIGER.

DOOR CHECK.

(Application filed Mar. 22, 1899.)

2 Sheeta-Sheet I.

(No Model.)

INVENTUI-T JOHN LZEsiGER.

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No. 642,947. Patented Feb. 6, I900.

J. L. ZESIGEB.

000B CHECK.

(Application filed Mar. 22, 1899.) (No Model.) 2 Sheets,-Shaet 2.

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Nrn STATES JOHN L. ZESIGER, OF CLEVELAND, OHIO.

DOOR-CHECK.

SPECIFICATION formingpart of Letters Patent No. 642,947, dated February 6, 1900.

Application filed March 22, 1899. SerialNo. 710,026. (No model.)

To all whom it may concern.-

Be it known that I, JOHN L. ZESIGER, a citizen of the United States,residing at Cleveland, in the county of Ouyahoga and State of Ohio, have invented certain new and useful Improvements in Door-Checks; and I do declare that the following is afull, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to locking-stops for doors, blinds, and the like, and is an improvement on my invention as embodied in Letters Patent of the United States, reissued July 26, 1898, No. 11,684. In the practical development of the check or stop as shown and set forth in said patent I found that it was defective or faulty in several essential particulars, and that sundry improvements were necessary to make the stop mechanically complete and commercially acceptable. In this work of development the conception of the invention was likewise enlarged, and I have made several new adaptations thereof and supplemented the old construction with certain new and material features, all substantially as shown and described, and particularly pointed out in the claims.

In the accompanying drawings the first five views relate to the same form of stop and are nearest in appearance to the stop shown in my former patent. Thus Figure 1 shows a crosssection of a door swung open and engaged with or by my improved form of stop. Figs. 2, 3, and 4c show each a longitudinal sectional elevation of the stop-casing and an elevation of the rotative catch in different positions, the position in Fig. 2 being that of readiness to engage with a section of the door in near proximity, in Fig. 3 engaged position corresponding to Fig. 1, and Fig. 4 with the catch closed Without the door and showing its limitations, as hereinafter fully described. Fig. 5 is a perspective view of the casin g and catch, showing the spring partially withdrawn. Fig. 6 is an elevation of a section of a door and a catch and easing thereon and a stop on the floor, the same being a modification of the invention, as hereinafter fully described. Figs. 7, 8, and 9 are views showing a modification adapted to be used with the doors of bookcases, cupboards, and the like, in which one of the members may be attached to the bottom of a shelf or other place. Fig. 7 is a longitudinal section of the casing fixed to the bottom of a shelf and showing a section of a closed door having the catch immovably looked, as hereinafter fully described. Fig.

8 is an elevation looking inward on line 8 8, Fig. 7; and Fig. 9 is a bottom plan looking 6o upward from line 9 9, Fig. 7. Fig. 10 is a sectional elevation of a form of device adapted to be fixed directly upon the floor and engage the lower edge of the door.

In all the foregoing views and forms of the invention there are certain important improvements common to all, and these will first be noticed in connection with Figs. lto 5. In these figures, A represents the casing of the stop, which is cast entirely in one piece, with an open end for the insertion and operation of the rotative catch B, and an open edge, within which is located the flat spring C.

I have found that it is desirable to have the spring C so constructed and arranged as to be removable at any time without separating the parts, and to this end I use a perfectly straight flat piece,which is the same at both ends, and may be reversed and inverted and support the said spring in the casing across a bridge a and beneath a web a at the heel of the casing inside the spring. This web has an inclined under surface, so that when the spring is inserted it will strike this inclined surface and be guided directly to its place. This enables the spring to be easily removed and replaced and to be exchanged or reversed as occasion may require.

Another point of novelty in this case as compared with my patent is in the form or go shape of the catch B. The old construction was defective in'several particulars. In the first place its edges corresponding to edges 2 and 3 were at right angles to each other,while in the present construction this part of the catch is substantially V shape. Hence formerly it was possible and indeed a common experience for a door to disengage from the catch without swinging the catch back on its pivot over the point 4, especially if the stop was not carefully placed at the right elevation orthe door came alittle too high. Then probably the catch would turn back where it had been, and when the door was swung against the catch againit would strike against Io 5 the arm corresponding to c in this construction instead of against arm 0 as it should. This disclosed another material defect in my old stop. \Vhen the door struck thus against arm 0', there was nothing to prevent it carrying the catch forward as far as the door could go in the L-shaped recess 1), and thus throwing the catch where it could not work and from which it was difficult to remove. For this reason I have constructed the arms 0 and c of different lengths from the center of rotation or axis Z), the degree of difference being plainly seen in Fig. 4, where the arm 0, which the door strikes in turning the catch to engagement, has rotated in past the edge a of the casing, and the arm 0 is sufliciently longer to bestopped by said edge. This is not a working position of the catch, but one to which it may be thrown accidentally and was common under the old construction. If it should be in this position now, the door could not carry itby the edge a and the stop simply would not lock until the catch was turned back to right position. Another advantage flowing directly from the Vshape of the sides of the catch is the smaller size of the recess between the arms 0 and c for the door as compared with my old stop, and by forming the bottom of the recess with a curved or concave surface 5 I can get closer to the pivot-point Z), and thus not only throw the catch more decidedly from one position to the other, but it will be impossible for the door to disengage without carrying the catch wholly over its point 4: onto the other straight side. Hence there is no half-way working of the catch possible in thisstop. Also when the door is engaged, as in Fig. 3, the spring 0 being long enough to engage on the point 4: below the pivot, and this part of the catch beingV shape instead of right-angled, the spring bears only on the point where it should and on no other part of the catch. The point 4 also is rounded in this instance instead of being sharp, as formerly, and hence works more smoothly and lasts longer and yet possesses the power to throw the spring even farther than before. The V shape of the catch in addition causes it to swing farther both in its open and its closed positions than formerly, and this makes a material difference in the operations of the device, obviating objections which were very decided in my old stop. On the return or reverse movement of the catch B the stop Z7 strikes the end of spring 0, and on the forward move ment the arm 0 strikes the edge a", so that in both directions the catch has its limitations, and it can rotate only between these and not go beyond them in either direction. The door D has a recess and keeper d, which is entered by arm 0 when looking occurs, as in Fig. 3; but still the lock is such that it will yield to a strong pull and let the-door be released. The catch therefore is automatic both ways and requires no handling to operate it.

Fig. 6 shows a modification where the catchcasing A has a stem 6 inserted in the door D and the catch E engages a stop E, fixed to the floor; but it might be fixed to the wall or base-board. In other respects it is like the foregoing construction.

In Figs. 7 to 9 the casing A carrying catch B is shown as attached to the under side of a shelf F, say, of a bookcase; but it may be in any like relation, and the spring 0 is in the same relation as formerly, while a keeper (1 is affixed to door D The other features of these parts are the same as in Figs. 1 to 5 and are so lettered; but there is an additional element by which a permanent locking of the door is possible. This consists of the horizontally-swinging and somewhat peculiarlyshaped dog G, pivoted beneath the outer end of casingA at g and having a finger g, adapted to enter between spring 0 and the shelf after the door D has been closed, thus preventing the catch from being rota-ted and effectually locking door D The finger g has a substantial wedge shape, as seen in Fig. 8, which makes the closure of the catch very effective.

A further and final modification of the invention is shown in Fig. 10, in which the easing A is understood to be fixed to the floor and the door D has a recess in its bottom edge, with a keeper-plate d at the front. The catch B has the V-shaped edges and the differential arms and other features, as in Figs. 1 to 5, and the spring C serves the same purpose. Other modifications could be shown, but these are deemed sufficient to illustrate the character and scope of the invention.

The so-called L-shaped recess 1) is rounded along its longer side hin the several views to adapt it to doors which may swing more than usually close to the casing and for that reason require room to come into the recess and operate the catch, whereas if this recess were not thus formed they would simply abut against the casing and stop. Hence the curved or inclined edge It is very important, as I have learned by experience.

The rounded feature h is common alike to all the casings and is so marked in all.

In Figs. 4: and 5 the spring 0 is shown as partly withdrawn, and these views also show the position of the catch B when the withdrawal of the spring can be effected; but yet it is held frictionally from dropping out even in this position of the catch.

An important feature in Fig. 10 is the dustguard 8 at its front, which is formed integral with the casing A and immediately behind which comes the spring 0. In both positions the catch 13 comes out flush with this part of the casing, and hence dust is kept out from beneath the spring and accumulations thereunder are prevented.

hat I claim is- 1. The casing having a recess in its end with an overhanging edge, in combination with a double-armed catch pivoted in said recess and having one arm of a length to pass within the said overhanging edge of the casing and the other arm of a greater length to env gage therewith, thereby preventing the catch over the spring and lock it down upon the catch, substantially as described.

4. The casing and the catch and spring therein, and a dog pivotally connected with the casing and having a tapered end to swing in over the spring and prevent the catch from rotating, in combination with a keeper engaged by said catch, substantially as described.

iVitness my hand to the foregoing specification this 18th day of March, 1899.

JOHN L. ZESIGER.

Vitnesses:

H. T. FISHER, It. 13. Mosnn.

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