US874721A

US874721A - Door closer and check.

Info

Publication number: US874721A
Application number: US21452504A
Authority: US
Inventors: Robert Adams
Original assignee: Individual
Current assignee: Individual
Priority date: 1904-06-28
Filing date: 1904-06-28
Publication date: 1907-12-24
Anticipated expiration: 1924-12-24

Description

' 'PATENTED DEG. Q4, 1907- R. ADAMS. DOOR CLOSER AND CHECK.

APPLICATION FILED JUNE 28, 1904.

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APPLIOATION FILED JUN}; 28, 1904.

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PATBNTED'DEG. 24, 1907.

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APPLIOATIOF FILED JUNE 28, 1 904.

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ROBERT ADAMS, OF LONDON, ENGLAND.

DOOR CLOSER AND CHECK.

Specification of Letters Patent.

Patented Dec. 24, 1907.

Application filed June 28, 1904:. Serial No. 214,525.

To all whom it may concern:

Be it known that 1, ROBERT ADAMS, a subject of the King of Great Britain, residing at 67 Newington Causeway, London, England, engineer, have invented certain new and useful Improvements in Door Closers and Checks, of which the following is a specification.

The object of my invention is to effect improvements in single and double acting doorsprings and in checks for same, and consists in simplifying the construction and reducing friction in action and the amount of workmanship necessary in finishing and assembling the various parts. By my improvements thecost of production of such articles is reduced, while providing for all the necessary adjustments and retaining (or) and improving the general eiiiciency of the more expensive arrangements.

My invention is illustrated by the accom panying drawings in which Figure 1 is a plan view of a double action door-spring and check; Fig. 2 is a detail sectional view of the-spring-fitting; Fig. 3 is a plan view of a single action door-spring and check; Fig. 4 is a plan view of a checking device suitable for use with the door springs.

Referring to the double-action door-spring shown in Fig. 1, a is the pivot or lower center upon which the door is mounted. a represents one of a pair of arms integral with the pivot. I provide a pair of action-plates 6, one at each side of the box, said action-plate 6 being fulcrumed at p in suitable recesses cast or formed in the walls of the box, their opposite ends being connected to the arms a by linksn and o The action-plates e are formed or provided with abutments n to limit the motion one way of the links 12?, so that, as shown in Fig. 1, when the door is in its closed position the pivots of the links are out of line. By this means, whichever way the door is opened, the links which are not in tension, being collapsible, freely fold out of the way so as to offer no resistance to the spring action. The links a are preferably curved as shown to accommodate the pivot and provide a smooth action when the door is being opened.

d is the spring which is compressed between the action plates e, the arrangement and construction of the spring-fitting being designed, as shown in Fig. 2, to facilitate the adjustment of its powerand to enable the same to be readily mounted and dismounted from between the action-plates e. For this purpose the sdpring d is mounted between the abutments 2 and 01 the former being formed or provided with a screw-threaded (or partially screw-threaded) stem (1 and the latter (d being formed with a tubular socket d Interposed between the spring (1 and the abutment d is a flanged nut d which is internally threaded to engage the screw thread of the stem (1 Both abutments d and d are formed with knife-edges or like projections 61 which engage in corresponding recesses e formed in the plates e, so that neither abutment is capable of rotating, thus enabling the nut d to be rotated for adjustment with the use of one hand only. The stem (1 is free to slide within the socket d The end of the stem 61 is drilled through at (i so that when the door is opened and the spring compressed, the hole (1 arrives opposite and coincides with a hole at drilled through the abutment (1 in this steel pin or wire may be inserted t ough d and d to interlock the two parts, and on further opening the door the spring fitting may be wholly removed.

The action-plates e are preferably formed of a channel or box section as shown in Fig. 2, and are each formed with two or more recesses c for the abutment edges d", so as to enable the spring to act equally between the plates interchangeably at a greater or lesser leverage to suit external conditions or other requirements, also to enable the spring to act upon one plate at a greater leverage than the other so as to secure complete closing in opposition to extra external resistance at one side, such as wind. One or both of the actionplates e may be provided with a screw f or other means for securing alinement of the door by setting oif the actionplates more or less angularly from the walls of the box. The screws f ortheir equivalent are also useful to compensate for slackness of the pivots arising from wear, and for general adjustment purposes.

In the single-action door-spring shown in Fig. 3, the spring (I is compressed between the action plate a and the end wall of the box; in this case the plate 6 is arranged across the box as shown, being fulcrumed at p and connected to the arms a of the pivot a by a curved link n. The end wall of the box and the action-plate e are each provided with recesses c, to allow of the adjustment of the spring leverage.

osition a Fig. 4 shows a modification in which each action-plate is acted upon by a separate spring, which may be of the ordinary type as shown or of the type shown in Fig. 2. I11 this door spring (which is shown as a doubleaction spring). the arm a of the pivot a is provided with a stud and (or) anti-friction roller a which works against the inner surfaces of the V shaped lever is pivoted to the box at k. The lever 7L may be formed in two parts, as two arms pivoted upon a common pivot 7c. The action-plates e are fulcrumed at p in the side walls of the box, and are connected by links Z with the lever or double arms is as shown.

The checking devices shown in Figs. 1, S, and 4 are particularly suitable for use with the doorsprings hereinbefore described owing to their peculiar arrangement and construction in combination with said doorspring fittings. In Figs. 1 and 4 the check cylinder h is pivoted at i in the bottom of the box and in a cross plate m, the piston rod 0 being pivoted at 0 to the end of a forked check lever t which is pivoted at t to a cross plate 25 The door-pivot a is formed with an arm a which carries a stud or stud and roller a arranged to work within the fork of the check lever 25, as indicated by the full and dotted lines in Fig. 4, in which figure the spring fittings are omitted for the sake of clearness.

As will be understood, for a single action the check lever 25 has only one pair of guides 1*, 1" as shown by the dotted .lines in Fig. 3, the check piston rod 0 being pivoted to the check lever t at the end of the guide 1*.

I claim 1. In a door closer, the combination with a casing, of a door pivot rotatably mounted in said casing, links operatively connected with and adapted to be actuated by the pivot, plates having one end thereof operatively connected to the said links, and the other ends fulcrumed in the casing, an arm on said pivot, a lever operatively connected to said arm, an adjustable actuating spring engaging the plates for returning the pivot to its normal position, and adjusting devices for regulating the tension of said spring.

2. In a combined door closer and check, the combination with a casing, of a door pivot rotatably mounted in said casing, links operatively connected with and adapted to be actuated by the pivot, plates having one end thereof operatively connected to the said links, and the other ends fulcrumed in the casing, an arm on said pivot, a lever operatively connected to said arm, a checking device actuated by the latter for retarding the movement of the pivot in one direction, an adjustable actuating spring engaging the plates for returning the pivot to its normal position, and adjusting devices for regulating the tension of said spring.

3. In a door closer and check, the combination with a recessed casing, of a movable pivot, links fulcrumed in the recessed portion of the casing and operatively connected with and adapted to be actuated by the movable pivot, actuating plates operatively connected to said links, an adjustable spring contacting with the plates intermediate their extremities and adapted to control the movement of the pivot, and a checking device operatively connected to and actuated by the pivot and working in opposition to the spring for retarding the movement of the pivot.

4. In a combined door closer and check, the combination with a casing having recesses in its sides, a rotary pivot mounted therein and provided with laterally extended arms, links connected with and adapted to be actuated by the arms of the pivot, plates having one extremity mounted in the recessed portion of the casing, and the other extremi ty connected to the links, an adjustable spring intermediate the extremities of the said plates and in contact therewith, and a checking device opcratively connected with and adapted to be actuated by the pivot for retarding the movement thereof.

5. In combination, a casing, a movable pivot mounted therein, links operatively connected with and adapted to be operated by the same, a spring, and plates in contact with the spring at one side thereof intermediate their extremities and with the casing at the opposite side of one extremity.

6. In combination, a casing having recesses, a movable pivot having arms in said casing, links operatively connected with and adapted to be actuated by the arms of the pivot, plates connected with said links at one end thereof, and the other end of the same mounted in the recesses, and a spring mounted in the casing between the plates and having contact intermediate the extremities of the latter for controlling the movement thereof. 7

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

ROBERT ADAMS. Witnesses:

GEORGE C. DOWNING, WALTER J. SKERTEN.