US1331349A - Door-closer - Google Patents

Description

P. MIKKELSEN.

DOOR CLOSER.

APPLICATION FILED AUG-4, 1919.

Patented Feb. 17, 1920.

[N VE N TOR A/lnmeys UNITED srnrnsrnrnivr OFFICE.

PEDER MIKKELSEN, OF STAMFORD, CONNECTICUT, ASSIGNOR TO THE YALE & TOWN E MANUFACTURING COMPANY, OF STAMFORD, CONNECTICUT.

DOOR-CLOSER.

Specification of Letters Patent.

Patented Feb. 17, 1920.

To all whom it may concern:

Be it known that I, PEDER MIKKELsEN, a citizen of the United States, and a resident of Stamford, in'the county of Fairfield and State of Connecticut, have in vented certain new and useful Improvements in Door-Closers; and I do hereby declare the following to be a full, clear, and

exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in that type of door closers having means for normally holding a door in open position, and it consists in improved means for releasing the door holding means in the event of a fire so that the door will then automatically close and shut off the draft and thus assist in confining the fire to the room in which it started.

In the accompanying drawings; Figure 1 is a view partly in section and partly in side elevation of a door closer with my improvements applied thereto and Fig. 2 is a bottom plan view of the same.

The improvement is designed for use with door closers or with combined checks and closers, hence I do not confine its application to either and by the term door closer, I intend to include combined checks and closers.

5 represents the casing of a door closer, and 6 is the spindle to which the lever arm 7 is secured, the said lever arm being adapted for cooperation with the mechanism of the door closer and the door for closing the latter in the usual and well known manner.

For the purpose of holding the door open the lever arm 7 is provided with a spring pressed dog 8, and the cap of the closer 5 is provided with an upwardly pro]ect1ng stop or rib 9, which is engaged by the lower beveled end of the dog 8 when the door is in open position, the dog riding over the stop during the opening movement of the door and dropping behind the same when the door is fully open, the pressure of the spring 11 bearing against the dog being sufficient under normal conditions'to prevent the latter from rising out of engagement with the stop, but not of course preventing the free manual operation of the door either in opening oi closing. The spring 11 bearing against the dog operates to prevent the spring in the door closerfrom closing the door when the dog is the spring holding the mal tension.

The dog 8 is mounted to move in the lever arm 7 and is provided with a chisel or beveled lower end to engage the stop 9, and with a head 10 which limits its downward movement and against which the free end of the long flat spring 11 bears, the head of the dog being grooved to re ceive the end of the spring which prevents the dog from turning in its bearings. opposite end of the spring 11 is provided with a hole to receive the end 12 yoke or support 13 which latter 1s b1fur cated as shown in Fig. 1, the two members thereof passing through holes in the lever arm and resting at their lower ends 011 the holding ring 14;. The spring 11 may be secured to the yoke, or it may be loosely seated on the same, the function of the yoke being to hold the spring in normal position and under the tension imparted to it by the tension screw 15 which passes through the lever arm 7 and spring 11 and is secured by a nut. By adjusting the nut the tension of the spring can be increased or diminished as may be necessary.

Passing through the lever arm between the holes in the latter for the side members of the yoke 13, is the screw 16 to the lower end of which is screwed the taper headed sleeve 17 the head 18 of which forms a seat for the fusible carrier 19. This carrier consists of two members made of comparatively thin metal, each disk shaped at one end and hook shaped at the other enc, each disk and hook being connected by a neck. The hooks 19 are reversely bent so as to interlock, as shown in Figs. 1 and 2, and the disks overlap and are secured together by a readily fusible alloy or solder, and when the parts are so assembled, the necks of the two members rest side by side and form a seat or carrier for the holding ring 1 1. The adjacent edges of the necks of the two members of the support 19 are cut away to form a circular open seat to receive and engage the taper head 18 of the sleeve 17, and when so secured forms under normal conditions a solid unyielding seat for the ring 14 and also the yoke, so that normally the yoke forms an unyielding support for the spring 11 and is capable of withstanding any tension that may be applied to the behind the stop and latter is under norvertically latter by It is evident end of the spring is removec the screw or bolt 15 and its nut,

however that instead of using a nut on the screw the latter may engage threads in either the leverarm or the spring.

, With this construction it will be seen that when the spring 11 is put under tension by the screw 15 itwill bear at one end against the dog 8 and at the other end onthe yoke 13. As the yoke is supported by the ring 1% resting on the fusible carrier, which in'turn is seated on the tapering head of sleeve 17, it will be seen that the pressure of the spring 11 on the yoke tends to separatethe two members'of the fusible carrier. The diskshaped ends of the fusible carrier are removed from the lever armand exposed on both sides to the temperature of the room, hence if the temperature rises abnormally, as in the case of a fire, it melts the alloy or solder thus permitting the pressure of the spring 11, which pressure is indirectly borne bythe fusible carrier 19, to separate or spread the members of the latter and force them down on thetapering surfaces of the head of sleeve 17. This withdrawal of the support for the yoke holding ring 14:, permitsthe yoke to settle down on the upper surface of the lever arm and release the tension of the spring 11 on the dog 8, so that the latter will be free tobe forced up and over the stop by the spring (not shown) of the door closer, thus permitting the door to close under the action. of the said door closer spring. f ,2 y

The tension bolt 15 should have a loose connection with the lever armor spring 11, or both, so that when the seat for the enter the spring will not bind on the tension bolt or the latter will not bind in the lever arm, but'that the said parts will be free to moveto relieve the dog of the pressure of spring 11.

The head 18 of the sleeve 17 may beo'f greater diameter than the ring 1% so that after the separation of the member comprising the fusible carrier the-ring will settle down and be supported by the head, or the ring mayhave an internal diameter that will permit it to drop away after the release of the fusible carrier, I

It is evident that many slight changes might be resorted to in the relative arrangement of parts shown and described without departing fromthe spirit. and scope of my invention. Hence I would have it' understood that I do not wish to confine myself to the exact construction and arrangement of parts'shown' and described, but

Having fully described my invention what I claim as new and desire to secure by Letters-Patent, is y, i

1. The combination of a door closer hav-.- ing a stop, a lever arm, a dog mountedin said lever armand engaging the stop for seat and normally supporting the yoke depending below the same,

securedtothe depending end of said screw, a fusible carrier resting on holding thedoor open, a spring one end of which bears on said dog, the other end ofthespring-and straddling a part of the lever arm so as to drop thereon when its support is removed, a tapering seat secured to and depending from the lever arm, a fusible carrier mounted on said a tension screw carried by the lever. arm .and engaging the spring intermediate its ends for adjusting thetension of the latter. l

2. The combination of a doorv closer having a stop, a lever arm, a dog ;mount'ed in said lever arm and'engaging the stop' for holding the door open, a spring one end of which bears on said dog, a bifurcated yoke normally supporting the oher end of said spring, the bifurcated member of said yoke passing through holes in the lever arm, a tapering seat secured'to' and depending from the lever arm, a fusible carrier mounted on said seat and forming the normal support for the yoke and a tension screw carried by the lever arm and engaging thespring intermediate its ends for adjusting the tension of the spring. a V V 3. The ccmbinationofa door closer ll'ZtV. ing a stop, said lever arm and engaging the stop, a spring one end of which bears on saiddo'gm bifurcated yoke normally supporting the other end of the spring the bifurcated member ofsaid yoke passing through'the lever arm, a screw secured'tothelever arm and dependmg below the same a taper-lngseat secured to the depending end of saidsorew, a fusible carrier resting on said seat and normally supporting'the yoke, and a tension screw-carried by the'leve'r arm and en aging the spring intermediatethe'endsof t e latter for adjusting the tension'of the spring.

4. The combination of ing a stop, a lever arm, a dog mounted in said lever armand engaging the stop, a spring one end of which bears on said dog, a bifurcated yoke normally supporting the otherendof the spring, thebifurcatedmember of said yokepassing'through the lever arm, a screw secured to the lever arm and atapermg seat I i the "seat, a ring mounted on said carr er and forming a sup:

tension screw carried by the lever armand engaging the spring intermediate the ends a yoke supporting a lever arm, a dog mounted in aldoor closer hav- "and V port for the lower-fend of the yoke and a of the latter for-fadj'usting'the tension Of 7 the spring. f I J Intestimony' whereof, I have signed this 7 specificationin the presence of two subscribing witnesses, ,1

v PEDER MIKKELSEN.

yWlll HGSS GSI 3'1 1 1: JosEPH MoHALE,:

Guns. A. BERRY.

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