US1052019A - Door-check. - Google Patents

Description

F. J. SPRING.

DOOR CHECK.

APPLIOATIONHLBD MAY 1s, 1912.

1,052,019, Patented Feb.4,1913.

WITNESSES FRANK J. SPRING, OF READING, PENN SYLYANIA.

DOOR-CHECK..

Specification of Letters Patent.

Patenten Feb. 4,1913.

- Application filed May 16, 1912. Serial No. 697,606.

To all whom t may concern.'

Be it known that I, FRANKYJ. SPEING, a citizen of the United States, residing at Reading, in the .county of Berks and State.

of Pennsylvania, have invented certain new and useful Improvements in Door-Checks, of which the following is a specication.

This invention relates to improvements 1n door checks and the object is to provide a device of simple construction that may be applied with equal facility to either a right or left hand door, and one which may be changed from a right to a left hand door action without removing or changing any. of theparts, the device being free toact 1n either direction and being provided with means for attaching it to the door jamb so that it will be in position for either movef mentof the door. I

The device is so constructed that the door may be opened with a minimum of eort and the return of the door is substantially uniform during .almost the whole of its closing path.

The invention is more fully described 1n the followin specification and clearly illustrated in t e accompanying drawing, in which yFigure 1 is aplan view, showingmy device in position on a closed door, with the l open position shown dotted.v Fig. 2 is a central longitudinal section ofthe casing. Fig. 3 is a detail of the by-pass regulating screw. Fig. 4: is a .detail of the roller bearing. v

The numeral 1 designates a door and 2 the jamb. i

3 designates the check casing which has a cover 4 formed with a securing plate 5 by means of which it is secured to the door.

The device is provided witlrthe usual arm 7 for connection tothe door jamb and in this case .I form this arm witha ball and socket joint at its connection with the check operating arm 8. This arm 8 is secured to a vertical shaft 9 located in the check casing, passing through the cover, and formed at its lower extremity with an anti-friction surface 10 adapted to rest in a suitable cuplike depression 11 in the bottom of the casing, so as to reduce the friction at this point to a minimum. Any other simple ball bearing may be employed if desired. Inside the casing, and secured to the shaft 9 by means of a pin 12 is located a movable or rotary cylindrical member 15', adapted to turn with the shaft. This member is formed with one or more inclined 'faces on its lower edge, and at its lowermost .pq-int it is provided with suitable anti-friction rollers 17 In the casing, below this hrotatable member, I secure a like cylindrical member 18, adapted to move only in a vertical direction in the casing, being guided by one or more guide strips 19, and formed at its upper edge with inclmed surfaces corresponding with thosev on vthe upper member, and against which the rollers 17 will bear when thel upper member is. rotated. These members 15 and 18 are hollow and thel member 18 is provided with a valve 20 to permit the passage of the liquid 21, as is usual in this .type of check.

This member 18 is backed by a spring 22 which serves to keep it in normal position against the upper member, and a by-pass 23 1s formed in the wall thereof, provided with a regulating screw 24.

With the parts in position as shown, the

'closing of the door-will cause the shaft 9 to turn in the casing and to turn with it the upper member 15; thismovement will force the lower member 18 down on the guides, through the action of the'rollers-on the inclined surfaces; as it is thus moved, the liquid in the casing will be forced slowly through the by-pass 23 and permit the slow and regular closing of the door. When the door'is fully closed, the liquid' will be insider the lower member, which member will be in the lower end of thecasing, and the rollers will be at thev top of the inclined surfaces on said member. The opening of the door, will, as is usual, turn the arm and shaft 9 in the opposite direction, and permit the lower member 18, through the action of the spring 22, to ride up with relation to the upper member, and'when this movement begins, the valve 20 will open and permit the liquidv to pass out easily, thus permitting the door to be opened without undue eort.V The only resistance in opening the door, is the usual closing spring 26, which, in this case is inclosed in a tubular member secured to the operating arm at its jointure with the jamb connecting arm 7. The spring` is joined to the casing in any suitable manner, so that when the door opens, as shown in Fig. 1, the spring is drawn into tension so that when the door is released it will act to close it. This closing is slightly aided however by the action of the spring in the check casing whose action is at all times opposed to that on the operating arm. Y

It is evident that to apply my device to a left hand door itis only necessary to place the operating arm on the opposite side oi the casing from that shown in Fig. 1 and secure the arm 7 to the jamb on that side.

AInasmuch as the parts 'are free to swing' nected to the casing cover, a jamb engaging arm connected with the check operating arm and adapted to be, swung from one side of the casing t-o the other, whereby to hold said check operating arm in position for right or left hand action, a rotating cylindrical member within the casing and secured to the shaft, said member having an inclined lower edge, a roller secured to the lowermost point of said member, a second cylindrical member having its upper edge inclined and adapted to be engaged by the rollers and to be moved vertically in a downward direction by the rotary action of the upper member, guides for the lower member, said member having a valve in its lower wall and a by-pass in its vertical wall, a regulating screw formed with a slotted bearing point located in the by-pass and a spring within the casing to keep the said cylindrical members normally in contact with each other.

2. In a reversible door check and closer the combination of a cylindrical casing formed with a cup like receptacle in its bottom, a rotary shaft seated therein, a reversible operating arm connected to the shaft, a cylindrical member rotatably mounted on the shaft and located within the casing, said Loeaoie member having its lower face inclined, a

'whereby the rotation of the upper cylindrical member will move the lower cylin drcal member in one direction, a spring lo cated between the bottom of the Icasing and the lower member to move the said member in the opposite direction, a valve in the bottom of the lower member, a vertical slot in the outer wall of said lower member to serve as a liquid bypass and a regulating screw formed with a slotted bearing-pointppassing through the casing wall Aand adapted to regulate the passage of liquid through the bypass. f Y

3. In .a reversible door check and closer the combination of a casing, a cover therefor provided with means for securing it to the door, a reversible operating arm having means for securing it to the door jamb for either right or left hand action, a pair of cylindrical cams in the casing, one of whichy is mounted for rotary movement within the casing and the other for vertical movement therein, means on the rotary cam for moving the vertically movable cam in a downwardly direction, a spring for moving said vertil cally movable cam in an upwardly direction, a shaft to which the rotary cam is secured, a bearing in the bottom of the casing for the shaft, a valve in the vertically movable cam, guides in the inner wall` of the casing -for said vertically movable cam, a by-pass in said vertically movable 4cam and a slottedscrew in the by-pass to regulate the flow of liquid therethrough. Y

. In testimony whereof I afix my signature in presence of two Witnesses.

FRANK d. SPRING.

Witnesses:

CLARA E. YOUNG, HAROLD A. WHITE.

Copies of this patent may be obtained for ylive cents each, by addressing the Commissioner of Patents,

Washington, D. C.

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