US1037641A - Door-check. - Google Patents

Description

J. KOC n. DooRGv PPPPP OATION FILED 11111.13, 1912. 1,037,641, Patented Sept. 3, 1912.

' 2 SHEETS-SHEET l.A

Zac-@@5115 @Mi-MAQ @m JoHNxocH, JRS, or BRooKLINE, MASSACHUSETTS.

'DOOR-CHECK.

Specification of Letters Patent.

' Patented sept. 3, 1912.

Application led January 13, 1912.. Serial No. 671,047.

To all 'whom t may concern:

Be it known that I, JOHN KOCH, Jr., a citizen of the United States, residing at Brookline, in the county of Norfolk and State of Massachusetts, have invented new and' useful Improvements in Door-Checks, of which the following is a specification.

This invention relates to door checks of a simple and inexpensive construction designed primarily for use on all types of fly screen doors and inside ysolid wood doors.

The annoyance caused by the repeated slamming of doors is a matter of common knowledge, and it is the purpose ofk my invention to provide at a moderate costl a check which will at all times be positive in its operation.

The device consists of the combination of a bracket, a pin hung loosely therein and thus permitted a limited lateralmovement as well as free revolution to an unrestricted degree, a rubber ball or other resilient body suspended by axial penetration from the lower end of said pin and free to revolve thereon, and a lat spring so disposed as to restrict the lateral movement of the pin in the direction of the bracket and cause` the pin to re-bound on impact with the spring.

Generally it will be found preferable to attachy the-device to the frame of the door, but ,when desired, it may be attached to the door, or to one of a pair of double doors.

When attached to the door frame, I find it advisable to secure a guard to the edge of the door in such a position that'the ball is prevented from' swinging in behind the door as the latter closes. While not essential to the successful operation of my device, this guard eliminates all possibility that the door when suddenly opened will catch 4the ball or suspending pin and tear the device from its frame or weaken its fastenings. When the device is attached to one of a pair of double doors the guard will beA fastened to the other of the pair.

In the accompanying drawing illust-rating my invention, Figure l isa front elevation of the upper portion of a door frame showing my new device attached thereto and the `door partially open. Fig. 2 is a front eleva tion of a portlon of a closed door and door frame showing my device attached to the latter. Fig. 3 is a plan View7 of my device attached to the door frame showing the door and door frame in section. Fig. 4 is a side elevation of my device attached to the door frame, as viewed from the left of Fig. 3. Fig. 5 is a plan view of my device attached to the door showing the door anddoor frame in section. Fig. 6 1s a front elevation ofthe upper portion ofa pair of double doors showing my device attached to one of the- Same.

Similar letters of reference indicate corr., 4responding parts in the several figures of the drawing.

In the drawing, A represents the/bracket, B the pin, C the ball, and D the flat spring.

E is the. door andlF the door frame. G is the guard.

X is the helical spring whichvoperates to close the door.

-Y Y are'` the screws which secure the bracket A to the door or door frame, as the case may be.`

In Fig. 1 the device is shown attached to the frame F ofthe door E by fastening the bracket A thereto by means of the screws Y Y in such a position that the periphery of the ball Cl projects about one-half of .an inch into t-he pathway of the door.

The method of operation is as follows: As the door E,actuated by the force of the helical spring X, swings shut, its progress is checked by contact with the ball C. The force of this impact drives the pin B against the face of the flat spring D, thus bringing this spring into action. The combined resiliency of the ball C and spring D causes,

the door ,to re-bound and the ball C to resume its normal position in the pathway of .the door. Thev continued pressure of the helical spring X gradually overcomes vthe momentum imparted by the shock of the rebound and once more throws the door against the ballC, but with less force than before. Again the joint resiliency of the ball C and flat spring D causes the door to re-bound, but this time `with lessened force and consequently to a diminished distance. This operation is repeated until the door is nearly closed. At each successive repetition, the force of the impact and, consequently, the length of the re-bound are diminished untilthe former has become so slight that no re-vbound results and but little resistance.

is 'offered by the ball C to the insistent pressure of the helical spring X. Actuated by this pressure, thedoor now gradually pushes the b all C aside and quietly closes. This step in the operation 1s rendered possible by the lateral play allowed the pin B in the slightly ajar by currents of air.

bracket A, and facilitated by the rotation of the ball C on the pin B, and of the pin B to the employment of a yielding feature in the part D, but claim that any stop or detent constructed and located substantially like the part D, whether the same be flexible or rigid, is within the scope of my invention.

All prior devices of Athis type have been fatally defect-ive in that they lacked certainty of operation. This failure to operateon occasions generally assumed one of two forms. At times, the resistance offered by the ball or block, in the position in which it lay, would prove insuiiicient, and the door would rapidly drive it aside and close with a slam. At' others, when for any reason the impact was slight, the ball would not be driven or pushed out of the way, but would be hugged between the door and the casing, and the door thus prevented fromclosing. This last was particularly apt to occur when the door was but partially opened or thrown Both of these dilicultiesr have been obviated and eliminated in the use of my device, which is positive and never-failing in its operation under all conditions.

I-Iaving thus described my invention and the operation thereof, what I claim as new, and desire to secure by Letters Patent is 1. In a door check, the 'combination of a bracket, a pin rotatably supported and free to swing therein, a stop secured to said pin,

. and a detent adapted to limit the lateral movement of said pin.

2. In a door check the combination of a support, a stop, means for suspending the stop from said support, and a spring :formed independently of said means'for suspendin the stop and adapted to limit the latera movement thereof.

3. In a door check the combination of a supporting member, a pin hung therein, a

stop suspended upon said pin, and a sprlng formed independently of said pin and adapted to limit lateral movements ofl said pin.

4. In a door check the combination of a supporting member, a pin resting loosely therein, a resilient body suspended upon said pin, and a spring resting in contact with said pin and adapted to r'es'trict its lateral movement. v l

5. In a door check, the combinatlon of a bracket, a pin'loosely sup orted therein and free to revolve and, swing aterally therein, a

stop secured to said pin and free'to revolve axially on said pin and a spring adapted to limit the lateral movement of said stop.

6. In a door check, the combination of a bracket, a pin loosely supported therein and free to revolve and swing laterally therein, a stop secured to said pin and free to revolve axially on said-pin and a detent adapted to limit the lateral movement of said 1n.`

7. In a door vcheck the combinatlon of a bracket, a pin loosely supported therein and free to revolve and swing laterally therein, a

stop secured to said pin and free to revolve axially on said pin, anda sprin formed independently of said pin and a apted to limit the lateral movement of said stop.

8. In a door check the combination of a bracket secured to the door casing, a pin hung loosely therein, a stop suspended on said pin and free to revolve axially, and a flat spring attached to the. under side of said bracket and normally resting incontact with said pin and adapted to restrict the lateral movement -of said pin and to prevent contact of said stop with the door casing.

9. In a door check the combination of a stop, means for suspending the stop, a. sprlng formed independently of said means for suspendin'v the stop and adaptedto limit 'its mot-ion, an a guard attached to the door and adapted to limit lateral movement of the stop.

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