US655107A - Door-check. - Google Patents

Description

No. 655,!07. Patented luly 3|, |900.

F. H. OGDEN.

D 0 R C H E C K.

(Application med Qqt. 1e, 1899.)

(nu Model.) 2 smets--sheetk WITNESSES: rb INVENTOR ATTORNEYS m: cams Pmns cc. wom-uws., wAsmNcron, n. c.

No. 655,|07. Patented .luly 3|, |900.

F. H. UGDEN.

DOOR CHECK.

(Application med oct. 1e, 1899.)

(No Model.) 2 Sheets-Sheet 2 wnNEssEs:

ATTORNEYS UNITED STATES *PAT-ENT EEIQE.

EEEDERrcK n. oeDEN, 0E NEWARK, NEW JERsEY, AssIeNoE oF oNE- HALE r.ro `HENRY ILL; f QE SAME PLACE.

.Y -sPEerErcAcr'roN' forming parier Letters ra/ent N6. 655,107', dated July e1, 1900.

" Application md octot'er 16.1599. sanita. 733,705. (Nomad.)

To all whom,` tm/cry concern.'v

Be it known that I, FREDERICK H. GGDEN,

a citizen of the United States, residing at Newark, in the county of Essex and State'of New Jersey, have invented certain new and useful Improvements in Door Checks and Closersg and I do hereby declare the followin'gto be a full, clear7 and exact descriptionof the inve'nl tion, 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 door-checks.

My invention consists in the novel means employed for operating the piston of the doorcheck, whereby the check may be applied either toa righthand door or to a left-hand door without opening vthe check andwhereby the check offersuno resistance other than that of spring tension'to swinging the door wide open and instantly begins to retard the motion of the door from `whatever position theV door may start to close,thereby avoiding' shock to the mechanism of the check and strain to the doorand hinges. V

The objects of my invention are to, avoid` the necessity ofopening the checkto change` it from adjustment for a right-hand ,door to' adj ustment for a Vleft-hand door, or `vice versa, to prevent thecheckfrom offering resistance to swinging the door wide open,and to pre'- vent undue and sudden strain to the mechanism of the check and to the door and its hinges. These objects are attained in' the door-check herein described, and illustrated in the drawings: which accompany and form a part of this specification, in which the same reference-numerals indicate the same or corresponding parts, andin which- Figure 1` shows a'central vertical section of my improved door-check, taken on a plane at right ,angles to the eccentric-shaft. Fig. 2 shows a central vertical section of the doorcheck, taken on a plane at right angles to that of Fig. 1. Figs. 3 andtare detail views showing the arrangement of the springs, Fig. 3 being a vertical section, and Fig. 4 a top View showing half of the upper spring broken away; and Fig. 5 is an elevation and partial sect-ion of the check, showing the use of a .yoke instead of an eccentric-strap for transy mitting motion to thepiston.

In the drawings, 1O'is`` the 4main casing of the check.

15 `isfa central shaft or spindle, to which is attached a leverVA 14, which is one ofthe two 'hinged levers by which the spindles of doorchecks are' cnstomarily connected to Aa doorfranie.'

The casing 10 is divided' internally into an upper or spring chamber 16, within which are the springs 17 and 172, and a lower chamber 18, in the upper portion of which are gears, a cam-shaft, and a cam or eccentric and eccentric-strap or equivalentdevice for operating the piston. `The lower portion of the chamber18,the workin g cylinder proper, contains a vertically-movable piston20.

In theform of check shown in Figs. 1 and 2 motion is `communicated from the spindle 15 to the piston 20`by`th`e' following means: A `cam-.shaft 24 is`rotatably mounted in lugs 30', depending from a plate 30,separating the `chambers 16 and 18, and is at right angles to the aXisof spindle V15. Upon the lowerend ofV spindle 15 is a bevel-gear26,"and upon'the `shaft 24is a larger gear 25, intermeshingwith gear 2,6. Uponshaft 24. is an eccentric 23, vthe eccentric-strap22 of which is pivotally'connected to lugs on thepiston 20.

In the form of check shown in Fig. 5 the eccentric orcam 23 lies within a y'oke 22', rigidly connected to Vthe piston 2O and guided by ribslO, projecting from the casing 10.1f This construction isthe substantial equivalent of that shown in Figs. land 2. `l

In the piston is a check-valve 4.1; which opens when the piston moves upward, permitting free passage of liquid from above the piston to below the same." The piston `is also provided with a leakage-passage 36, arranged to be partly or completely closed by a screw valve-plug?, uponthe end voffwhich'is a spur-wheel 3S, adapted to mesh with a pinionrod 39, which passes through the bottom of the casing of the check and has upon its end the cylinder the Valve 37 may be opened or.

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closed, as desired.

When the length of the toggle-levers by which the check is operated is correct or is that which is usual, the eccentric or cam is on its dead-center when the door is in its closed position. Therefore in whichever direction the spindle'l and the shaft 24 be rotatedthe piston will be raised.V As here-- inafter described, under certain conditions the length of one of the toggle-levers may be changed from this normal adjustmentin order that the checking action of the piston may cease slightly before the door is closed; but in any case, whether the check be `attached to a right-hand door or to ,a left-hand door, the piston'will be raised whenthedoor is opened.

the door is swung wide open and is as nearly as possible back against the wall the motion of the piston is reversed before the door reaches the limit of its swing. The doorcheck,.therefore, may and frequently does actually resist the movement of the door through the last Vfew degrees of its swing.`

This is objectionable, both because of the resistance thus offered and because when the door is .released after havingbeen opened widely it is permitted to move Without restraint fora considerable distance, and thereby to acquire considerable momentum before the checking action begins.

The result is that when the check does begin to act a sudden and severe strain is imposed upon the` mechanism ofthe check and upon the door and its hiuges,'with theresult that the mechanism of the check is often broken or injured,

and the hinges are often strained ortheir screws torn from the wood. The premature reversal of the motion of the piston is due to the `fact that the toggle-levers by which the check ,is operated as the door swings multiply "the angular movement ofthe door. so

causing kthe spindle of the check to'rotate through a greater Vangle than that through` whichthe door swings, so that if the door bey opened widely the spindle of the checkmay be rotated through an angle greater than one hundred and Aeighty degrees. In this check,

however, the `spindle is connected to the horir zontal shaft carrying the eccentric by reducing-gearing, and the eccentric-being arranged to swing through about one "hundred and eighty degrees before the motion of Vthe piston is reversedtunlessin the meantime the motion of the spindle 15 be also reversed)rno` such vreversal of motion of the piston as will checljthe further opening of the door or permit the door to close without restraint for a considerable distance may take place. restraining action of the check begins immet l5. In most liquid checks heretofore used when The are imposed either upon its mechanism or' upon the door and its hinges.

In former checks it has been customary to employ but a single spring, and in order to adapt the check for use on a left-hand door when it is already adjusted for a right-hand door-,or vice versa, it has `been necessary to remove the cover to the spring-chamber and reverse the spring. In my check, however, I employ two springs 17 and 172, which are oppositely placed. One end of each of these springs engages a side of a groove 34 in the side of the chamber 16, and the other end of each spring engages a lug 33, projecting from the bushing 32, `which surrounds the spindle This bushing is provided at the top with a iianged headhaving ratchet-teeth adapted to be engaged bya pawl 43 on thelever 14, as is customary. It will beseen that with this arrangement in vWhichever direction the bushing 32 is rot-ated one of the springs 17 or 172 is brought under tension, whiletheend of the other spring remains stationary, the bushing 32 slipping idly past it.

The operation of. my check is .as follows: When the door is opened, no matter whether the spindle 15`be rotated to the right vor to the left, the piston is caused to rise, the checkvalve 4l permitting the free passage of .the fluid from above the 'pistonto below-it, and at the same time one of the springs is wound up. When the door is released andlbegins to close again under the-action of that spring which is under tension, .the piston :moves downward, the check-valve 4l closing, and the door can close onlyas rap-idly asispermitted bythe `escape of iluidfrom-thefspace beneath the piston through the leakage-opening 36. When the door has almost closed, the eccentric has almost reacheditsdead-center, and therefore thev check-at suchpoint oers comparatively little .resistance Ato. `the closing of the door, ,thus permittingthespring to overcome the friction ofthe Alock ofthe door. If desired, the check may beso adjusted that when the door is closed the eccentric is not precisely .atits dead-center, but has passed the dead-center slightly.. s Inusuch case the piston begins to move upwardngjust before the door is completely closed., thusentirelystopping the checking action and leaving the entire Vforce of-the springavzailable to overcome; the friction of the lock.--T-his `adjustment `may be made by adjusting-the length of the adj ustabletoggle-lever by which the check is connected tothe door-frame, one voahe toggle-levers being customarily adjust- .a e' i A ,t In orderYV to adapt this check from adjustment fora right-hand door to adj ustmentfor a left-hand door, or vice versa, itis necessary :merely 'to reverse the pawl 43and to rotate the bushing 32 by meansof a .key in the customary manner in ythe direction in whichsaid bushngw'illbe rotated Vwhen V'the door lis vopened to .theextent `which'is necessary in ICO IIO

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order to place the springunder the desired initial tension. Y

I do not limit myself to the use of two oppositely-arranged springs, as shown in the accompanying drawings, but may use instead a single spring, as has been customary heretofore, the spring being reversed when it is desired to adapt the check for a door opening in a different direction from that for which the check is already adjusted.

I regard the construction shown in Figs. l and 2, in which an eccentric and eccentricstrap are employed, and the construction shown in Fig. 5, in which an eccentric cam and yoke are employed for operating the piston, as equivalent constructions, and in th,e following claims employ the term cam to include both the cam proper, such as shown in Fig. 5, and the eccentric shown in Figs. 1

and 2, it being well recognized that an eccentric is as truly a cam as it is a crank.

Having thus completely described my invention, what I claim, and des-ire to secure by Letters Patent, is,n

1. In a door-check, Athe combination, with a vertical working cylinder, a vertically-movable piston therein, and a vertical spindle mounted to be rotated, and connections between the door and spindle to rotate the latter when the door swings, of mechanism driven from said spindle to transmit the motion thereof to the piston, said mechanism comprising a cam, reducinggearing to transthe door swings,`of a shaftV arranged at right angles to the axes of the cylinder and 'spindle, reducing-gearing connecting the spindle and shaft, an eccentric on the shaft, and a device connected to the piston and movable by the eccentric to transmit movement from the latter to the piston, the arrangement and proportion of said parts being such that the eccentric will be at a dead-center when the piston is at either limit of its travel, whereby the piston has a substantially-continuous motion in one direction during the, opening or closing movement of the door.

In testimony whereof I have hereunto af' fixed my signature in the presence of two witnesses.

' FREDERICK H. OGDEN'. Witnesses: E. M. MARBLE, H. M. MARBLE,

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