US625495A - Door check and closer - Google Patents

Description

No. 625,495. Patented May 23, I899.

a. w. FERNALD.

DOOR CHECK AND CLOSER.

' (Application filed m. 16, 1898.) (No Model.) 3 Sheets-Sheet I.

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(No Model.)

G. W. FERNALD.

Patented May 23; I899.

DOOR CHECK AND CLOSER.

(Application filed Mar. 16, 1898.)

3 Sheets-She 2.

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No. 625,495. Patented May 23, I899. G. W. FERNALD.

DOOR CHECK AND CLOSER.

(Application filed Mar. 16, 1898.)

3 SheetsSheet 3.

ITNE'EEES 7% X42 UNITED STATES PATENT OFFICE.

GEORGE \V. FERNALD, OF NEEDHAM, MASSACHUSETTS.

DOOR CHECK AND CLOSER.

SPECIFICATION forming part of Letters Patent No. 625,495, dated May 23, 1899.

Application filed March 1 6,1 8 9 8.

T 0 all whom it may concern:

Be it known that I, GEORGE WV. FERNALD, a citizen of the United States, residing at Needham, in the county of Norfolk and Commonwealth of Massachusetts, have invented a new and useful Improvement in Door Holding, Releasing, and Checking Devices, of which the following is a full specification.

My invention relates to a device for regulating the action of door springs or weights; and it consists in so constructing and arranging the parts that the opening, holding open, and closing of the door are under perfect regulation and control.

Mechanism in which my invention is embodied is illustrated in the accompanying drawings, in which Figure 1 is a view showing in elevation a part of a door and its casing, showing one of my regulators in its simplest form. A doorspring is also shown. Fig.2 shows, partly in plan and partly in section, the parts shown in Fig. 1. Fig. 3 shows in elevation parts of a door and frame having my invention attached, the door being closed. Fig. 4 shows the same parts as in Fig. 3, the door being open. Fig. 5 is a cross-section taken on lines 5 5 of Fig. 4. Fig. 6 is a view, partly in elevation and partly in section, of a modification to adapt my device to a door that swings in both directions. Fig. 7 is a plan view of the device as shown in Fig. 6. Fig. 8 is a crosssection taken on line 8 8 of Fig. 7.

In the drawings, Figs. 1 and 2, E represents a door, and E its casing. The door is hung on ordinary hinges, as H, and a spring-hinge H. Their parts are not new and need not be more fully described. To the casing E a plate A is attached, to which plate A an air-cylinder C is made fast. This cylinder has a small outwardly-opening valve 0. A small opening is made in the cylinder and is partly closed by the loosely-fittin g screw 0 By adj usting the screw the amount of air admitted can be regulated at will. A closely-fitting piston B works in the air-cylinder O. The piston B has a rod B, the end of which is connected to the sliding block B. The block B has also attached to it by a pivot at D a swinging arm D. This swinging arm D has at its outer end a series of holes D D (see Fig. 2,) adapted to receive the end of a vertically-disposed -tion shown by dotted lines in Fig. 2.

Serial No. 674,003. (N0 model.)

pivot-pin D mounted on the bracket D attached to the door E. The several holes D D in the arm D are made for convenience in adjusting the parts.

In the operation of the foregoing parts the opening of the door moves the pin D in the same direction, and this pin drawing on the arm D shifts the block B toward the cylinder 0 and simultaneously pushes the piston-rod into the said'cylinder and forces the piston B gradually to the location of the valve 0. By this movement of the piston the said valve is opened and the air in the cylinder escapes and the piston and relative parts assume the posi- When the door is closed either by the spring-hinge H or by any other device, the piston B returns against the pressure of the atmosphere or air, there being created a substantial vacuum within said cylinder'by said return of the pis ton, and as this forms an added but cushioned and yielding resistance to the force exerted by the said spring-hinge it follows that the inward swing of the door is checked and softened when the piston is brought against the cushion resistance stated. When the piston passes the small opening controlled by the screw 0 the air is drawn therethrough into the cylinder behind or to the left of the piston for use during a successive opening operation. By the movement of the piston toward the left in the opening operation of the door a small portion of air in the cylinder may pass out through the small opening controlled by screw 0 but the opening regulated by the valve C beinglarger and offering comparatively no resistance the major portion of the air will outflow or escape therethrough.

The piston B in the air-cylinder O is con structed as shown in Figs. 6 and 8, which may be described as follows: The rod B has a screw-thread cut upon it, as shown, and has a fixed or check nut B against which the yielding packing b abuts. A second screwnut B is located at the other end of the yielding packing 19 This screw-nut B has points affixed to it, which are adapted to engage with holes made in the fixed disk B (See Fig. 8.) Hence by turning the piston-rod B, thereby causing the screw-nut B to move against the soft packing b the said packing may be com pressed, so as to fit tightly in the cylinder.

For the purpose of automatically holding the door open I have the following-described device, (see Figs. 3, 4, and 5:) A sliding casing F is mounted upon a fixed base-piece F. The motion of the sliding casing F is in a direction lateral to the movement of the block B. Its forward motion is given to it by the bentlever K K, pivoted at K The bentlever K K is arranged so that when the block B comes in contact with it when the door is wide open it will act upon the pin F in the casing F and throw the said casing forward. Within the casing a spring-bolt L is placed. This bolt L moves with the casing, but also has a motion within the casingthat is, the spring F Fig. 5, throws it forward in advance of the casin g when it is free and allows it to be forced back into the casing by the campiece L under certain conditions, as will be explained. The cam-pieceL' has a notch L with which the rounded end of the bolt L engages, as shown in Figs. 4 and 5. An electromagnet M operates an armature M. The said armature has a detent M which is adapted to engage with a corresponding detent F on the slide F and hold it forward, and thus cause the spring 13 to hold the bolt L forward in its engagement with the notch L in the campiece L. The armature h is thrown forward by the spring M so as to engage with and hold the casing F.

When the door is held open by the bolt L and it is desired to allow the door to close, the magnet lWI is energized by sending a current of electricity through it by a conveniently-located push-button.

The door is not held absolutely by the bolt L, as it has a rounded engaging end, and if the door is acted upon by any considerable force the bolt will yield, it being held by the spring F and thus allow the block B to slide and the door to close.

In the modification shown in Figs. 6 and 7 the door is adapted to swing both ways and the cylinder and its piston device is placed immediately over the door between it and the upper casing, as shown in the drawings.

I claim- 1. In a door check and closer, the combination with a cylinder, a piston therein, a sliding block operatively connected with the piston,

and mechanism for connecting the block to a door, of a locking-bolt arranged to engage the block, mechanism for tripping the bolt, and mechanism for retracting the bolt, substantially as specified.

2. In a door check and closer, an air-cylinder having a piston and sliding block attached, means for connecting the same to the casing and the door; a sliding bolt adapted to engage with and hold the said sliding block, thereby holding the door open; an electromagnetically-controlled detent adapted to hold or release said sliding bolt, substantially as and for the purpose set forth.

3. In a door check and closer, the combination with a cylinder, piston, a sliding block 0peratively connected with the piston,and mechanism for connecting the block with a door, of a spring-actuated locking-bolt arranged to engage the block, a trip-lever operatively connected with the bolt and in the path of the block, and mechanism for retracting the bolt, substantially as specified.

4. In a door check and closer the combination with a cylinder and piston, of a sliding block operatively connected with the piston and provided with a curved recess, a springactuated locking-bolt provided with a curved end arranged toengage the recess, a detent for dogging the bolt in its locked position, mechanism for withdrawing the detent, and means for connecting the block with a door, substantially as specified.

5. In a .door check and closer the combination with a cylinder, of'a threaded piston rod extending therein, a nut carried at the extremity of the rod, and a second nut upon the rod and expansible packing intermediate of the nuts, of a disk fixed within the cylinder and cooperating mechanism carried by the last-named nut and disk to retain the nut against rotation whereby the packing may be expanded by the turning of the piston-rod, substantially as specified.

In witness whereof I have hereunto set my hand and seal.

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