US652746A - Door-check. - Google Patents

Description

Patented July 3, I900.

A Rm 4 2 5 6 0 N DOOR CHECK.

(Application filed Jan. 22, 1900.)

(No Model.)

we NORRIS PETERS co. PNOTO-LITHO., WASHINGTON. a. c.

'N-ITED- STATES:

PATENT DOOR-CHECK.

SPECIFICATION forming part of Letters Patent No. osaveauatedaul 3, 1900.

Application filed January 22, 1900:. Serial No. 2,394. (No model.)

To aZZ whom it may concern:

Be it known that I, ARTHUR R. COLBURN, a citizen of the United States, residing at Washington, in the District of Columbia, have invented certain new and useful Improvements in Door-Checks, of which the following is a specification.

This invention relates to door-checks, and particularly to that construction in which the air under compression in a cylinder is allowed to escape, permitting a spring to effect the final closing of the door.

The invention has for its object to simplify and improve the construction of the cylinder and air-compressing piston therein by providing a tubular stem extending from, and comin unicating with the working face of the pis ton and adapted to contact with a separated member for the purpose of primarily checking or preventing the escape of air from the cylinder either wholly or partially, so as to receive the initial impact of the separate member and afterward permit a gradual escape of air from the cylinder as desired and according to the necessities of the case in the final closing and latching of the door.

The invention has for a further object to:

provide means for mounting the'cylinder of the check so as to permit an oscillatory motion of the same in a horizontal plane as may be needed to direct the stem towardthe'contacting member at a proper angle and to restore the cylinder to its initial position after such motion.

Another'object of the invention is to provide a tip, located upon the tubular stem, so as to substantially close the aperture in the primary impact or violent contact between the separatedmembers whose closing is modified and governed by said invention and af-' bythe closing of the door. Fig. 2 is a longi tudinal section of the parts shown in Fig. 1 with the door 'in a closed position. Fig. 3 is aside elevation of a modified application of the check mounted upon the door and adapted to contact the casing, the door being shown in a closed position.

Like letters of reference refer to like parts in the several figures of the drawings.

In the application of the invention herein illustrated and described the checking-cylinder, with its tubular stem extending from the piston, has been shown in Figs. 1 and 2 as applied'to a door-casing, as at A, and a door A is adapted to contact with the free end of the tubular stem, thereby forcing the same inward to compress the air within the cylinder. This position of the cylinder, however, is not essential, and it may be arranged in any desired location, as in Fig. 3, wherein it is shown mounted upon the door A and the free end of the tubular stem adapted to contact the door-casin g A,the essential object being that the tubular stem through which the air escapes from the cylinder shall come in contact with a separated member however located It will also 'be'understood that the door A'or other movable member the action of which is sought to be governed or modified turn the door to its closed or latched position after the air under compression has escaped from the cylinder.

In the form and application of the invention here illustrated a cylinder B has been provided which may be of any desired size or construction, dependent upon the character of-the work to be accomplished. This cylinder is provided with any form of piston, preferably as shown at B, through which the tubular stem 13 extends and communicates with the space between the working face of the piston and the closed end of the'cylinder. A suitable means is also provided for projecting this stem from the cylinder, and thus placing the piston in position for its-subsequent operation, and one form of which means'is illustrated in the restoring-spring B, which may be connected at one end to the cap or cylinder-head B and at its opposite end to the piston. A. compressible tip 0, of

ail

suitable elastic material, is provided at the free end of the tubular stem andhas an aperture therein through which the air may escape from the tubular stem, said aperture being adapted to be closed by heavy initial impact of a contacting member when in operation and after said impact to regain substantially its former normal form and condition and allow the air to escape through anotch O in the contact-surface of said tip or through some equivalent aperture adapted to be closed by violent impact. The tip is made of compressible material adapted to flatten or yield under the force of impact, whereby said notch or opening will be for the time being compressed or closed, forming in said cylinder a complete or partial air-cushion, dependent upon the pressure upon the tip,

, whereby to overcome said impact, whereupon said tip will resume sufficiently its normal shape and dimensions, thus allowing said notch or opening to be restored, which will then permit the escape of air from said cylinder and tubular stem. The construction whereby this result may be accomplished may be varied without atfecting the principle of action described.

The parts herein described constitute the essential elements of the invention and when placed in position for use leave the door perfectly free in its opening movement, as all the operative parts are mounted upon one member and are independent of the other.

The cylinder B may be mounted in any suitable manner and rigidly, if desired; but for the purpose of permitting an oscillating motion of the cylinder in order that the stem extending from the piston may accommodate itself to the are described by the point of contact with the separate member means are herein illustrated for pivot-ally mounting the cylinder. In the present illustration this means consists of a band or sleeve D, surroundingthe cylinder and pivotally mounted by' means of a pintle D in a securing-plate D In the form of the invention illustrated in Figs. 1 and 2 this plate may be applied to the casing of a door, and thus permits a free pivotal movement of the cylinder. lVhen this oscillation of the cylinder is permitted, it is also necessary to restore the cylinder to itsinitial position for a subsequent operation,

and for this purpose a restoring-spring E, extending longitudinally of the cylinder, is provi'ded,which is shown as carried by the plate D and has a portion E resting in a recess in said plate to prevent a pivotal movement of the spring,while the opposite end E of said spring composes a loop through which the free end of the cylinder passes. It will be obvious that any oscillatory movement of the cylinder will place the spring E under tension, and when the cylinder and piston are freed from the contacting member the spring E acts to restore the piston to its initial position for the next operation. In the application of the invention shown in Fig. 3, where the cylinder is carried by the door and contacts with the casing, the sleeve D and spring E are shown as mounted on a bracket F. The construction and operation of' the parts in this modified application of the invention are otherwise the same as hereinbefore described in connection with Figs. 1 and 2. It will be obvious that this pivotal mounting of the cylinder will permit the same to be thrown to one side and out of operative position whenever desired, as the cylinder may be slipped through the loop E thus relieving the tension of the spring thereon and permitting the cylinder T to be turned at an angle to its normal position or altogether removed for any desired purpose.

From the foregoing description the operation of the invention will be apparent, and it may be only necessary to state that the primary action of the checking device is to stop the door in its closing motion under the tension of its spring and afterward by the gradual escape of air from the cylinder through the escape-notch O to permit the final closing and latching of the door with an easy and practically-noiseless movement. When the door is opened, no tension is exerted thereon by the checking device, which in no wise resists the opening thereof; but, on the contrary, it will be apparent that the restoringspring B acts rather to assist in the opening of the door after the same has been unlatched.

It is obvious that the simple construction of the several parts permits the device to be readily and easily placed in position or removed whenever found necessary or desirable, and the parts are readily separable for any purpose. While the invention has been illustrated as applied for the purpose of checking the closing of a door, it may be applied to any structure or device in which separated members are adapted to contact with each other, and although it has been shown in a particular position upon the casing and also upon the door it may, however, be applied in any desired position, either upon the upper or side frame of the casing or door. It will be further obvious that changes can be made in the details of the construction of the cylinder and its operating parts and mechanism without departing from the spirit of the invention as defined by the appended claims.

Having described my invention and-set forth its merits, what I claim, and desire to secure by Letters Patent, is-

1. A pneumatic door-check comprising a cylinder having a closed end, a piston therein, a tubular stem communicatingwith the working face of said piston, to permit the discharge of air therefrom, and a tip provided upon the free end of said stem and adapted to partially or wholly prevent the discharge of air therefrom by contact with an object separate therefrom; substantially as specified.

2. A pneumatic door-check comprising a cylinder, a piston therein provided with a tubular stem having an opening in its free end adapted to wholly'or partially close by contact with an object separate therefrom, and means for returning said piston to its initial position; substantially as described.

3. A pneumatic door-check comprising a cylinder, a piston therein provided with a tubular stem having an opening in its free end adapted to be Wholly or partially closed by contact with an object separate therefrom, and a spring extending between said piston and a portion of the cylinder for restoring the piston to its initial position; substantially as specified.

4. A door and door casing or jamb in combination with a pneumatic door-check, comprising a cylinder pivoted to one of said members and free to oscillate independently of the other member, a piston therein, a tubular stem communicating with the working face of said piston, a compressible tip on the free end of said stem, and means for normally projecting said stem; substantially as specified.

5. A pneumatic door-check comprising a pivoted cylinder, a piston therein, a tubular stem communicating with the working face of said piston, acompressible tip on the free end of said stem, means for normally projecting said stem, and means for restoring said cylinder to its initial position after movement on its pivot; substantially as specified.

6. In a pneumatic door-check the combination of a sleeve adapted to be pivoted to a fixed or immovable object, an air-cylinder longitudinally disposed within said sleeve, a piston within said cylinder having a tubular stem extending from the same, a compressible tip on the free end of said stem, and means for normally projecting said stem; substantially as described.

7. A pneumatic door-check comprising a cylinder, a piston therein, a tubular stem extending to said piston, a tip on said stem having, a discharge-outlet at its free end, adapted to be automatically Varied in capacity by contact-pressure from a separated member, and

means for normally projecting said stem; substantially as specified.

8. The combination with a casing and door mounted therein, of a cylinder secured to one of said members and having a tubular stem to permit the escape of air from said cylinder and adapted tocont-act at the free end with the other member to limit said escape; substantially as specified.

9. A pneumatic door-check comprising a cylinder, a piston therein a tubular stem communicating with the working face of the piston, a compressible tip on the free end of said stem, and means for normally projecting said stem; substantially as specified.

10. A pneumatic door-check comprising a cylinder, a piston therein, a tubular stem connecting with the working face of said piston, means for projecting said stem, and a sleeve surrounding said cylinder and adapted to be swiveled in a support; substantially as specified.

11. A pneumatic door-check comprising a cylinder, a piston therein, a tubular stem connecting with the working face of said piston, means for projecting said stem, a sleeve surrounding said cylinder and swiveled in a support, and a restoring-spring embracing the free end of said cylinder; substantially as specified.

12. A pneumatic door-check comprising a cylinder, a com pressing-piston tl1erein,a sup porting-plate, a sleeve surrounding said cyl inder and swiveled in said plate, anda spring secured to said plate extending parallel with said cylinder and embracing the free end thereof; substantially as specified.

13. A pneumatic door-check, comprising a cylinder, a compressing-piston therein, a tubular stem connecting with the working face of said piston, means for normally projecting said stem, and a compressible tip upon the contact end of said stem having therein an escape-recess extending within its contactsurface; substantially as specified.

14. The combination with the door-casing and door mounted therein of a cylinder pivotally mounted upon one of said members, a piston and tubular stem within said cylinder and adapted at its free end to contact with the other member, means for projecting said stem, and means for restoring said cylinder to its initial position; substantially as specified.

15. A pneumatic door-check comprising a cylinder with means for compressing air there in, and an automatically-variable dischargeopening from said cylinder adapted to be con trolled by contact with an object separate therefrom; substantially as specified.

In testimony whereof I aftix my signature in presence of two witnesses.

ARTHUR R. COLBURN.

Witnesses:

ALFRED T. GAGE, ALBERT HARPER.

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