US656543A - Pneumatic door-check. - Google Patents

Description

Patgnted nu fzl', I900. E. H. HARRISON & T/LAWSON.

PNEUMATIC DOOR CHECK.

(Application filed July 7, 1899.)

2 Sheets-Sheet l.

INVENTORS' ORNEYS.

1b,. M85911, BY M6 ar'lrm (No Model) WITNESSES:

No. 656,543. Patented Au 2!, I900.

' E. H. HARBISUN & T. LAWSON.

PNEUMATIC noun GHEGK.

(Application filed Jul 7, 1699.

{No Mudql.)

WITNESSES' INYENTOR5=- 1 i'fl /d, I (E Fr k inimn iilniren nni tr llrrioni ENOR ll. liJiRRISON AND THOMAS LAW'SON, F NEWl'l-iRK, NElV JERSEY.

melanin/ eno noon oi- SPECIFICATKON forming part of Letters; Peienl cleteci .iliugnst 21, 1300.

Applioeiinn filed July 7, 1899 Sorini Ho. 753E110. (No model.)

5 a rear end. view of the pneumatic cylint lie it known ii-lint we, Enos ll. HARRISON and THIUMz'sS ilnm'son, citizens of l-llQUllillGCl Sialos, residing at Newark, in the count-y of Essex and Sta-be of New Jersey, have invented cert-min new and useful improvements in ilnei mitio Dom-Cheeks; anti We do hereby lilo followin lo lie a lull, clear, and oxaiomiosoriyuion of the invention, such as will enable others skilled in time art; to which it ap- PGl JZilIlra' to lllilliO end use the some, reference being had to the accompanying drawings, and to letters 01 reference marked thereon, which form oi purl, of this specification.

The objects of this invention are to pro rifle oi pneumatic riuor-oheok which will be applicable to a, double-acting door or a door onprilile of opening inwardly and onlwairally on its hinges, to provide ii cheek which will be less visible to the rye and one thetwill not an; oifoobnnlly and efficiently in checking ililfllDWfl-lil movement of tho door as in Gllfifili" in its outward movement, to reduce illlE': cool; of cone naction and provide ii iii mole and coin pawn nrrengenieni which will be durable and strong and less liable to get out; of order, and to secure other advantages and results, some oi? which may be roi'errei to hereinafter in oonneelion. wiin the description 'of the worklog ports.

The invention consists in the improvedpneumzicio ioor-olleolii nnil in; l-lie ill'l'illlgfi" moons and combinations of pin-to of the some, all snbsmniiel-ly will be heroine-lilo]! eei; forth, and finally omlirnoeil in the clauses oi the claim.

. liielerring to the accompanying drawings, in which like letters of reference iili oorreepomiing parts in OzuSll oi. the several ligores- Fignre l is a front elevation of lhe upper pawl; of :1.- door and iizge frame to which our inn proved door-chock has been applied, the sin-id door mn'l' its frame being;- in pnrtiol section to Show the operating pin-ls more clearly. lllff. 2 in a, sectional View oi the door ll'llill'd and olieelc, taken. at line :11, Fig. i. Fig. is a Win of the (loo-Pollock detached from the ons i 0, and showing the pin-ls, on on onlnrgeil e :aile with o, (5(llll'l60illlg-2ll'lll of ;i type adopt e l i'or is, single-noting (loor. 'l ig, l in n oes- Zion olllie some, taken no lixioiy, Fig. 31 Fig".

enowing 11 means for adjusting the nir'eeenpe v re. iii Elie n sectional detail ion in; lin is a side eleveiion in (lei/nil, elion'in ooneirnolerl 1' ill rloni'i melin door. in :3; rl rim-swings, o ind zitoe 2i bBll-plllfi,

Wllifill donglindinolly slotted, or at u-'-, to r oeiv n, oonneoling-nrm I) and perm it the movelnont oi the slime longitudinally when operated noon by line pielonrmi (1. Ti 9 said slot a is located at one end of the bed-plate and extomle to a point about at tile miridle of the midi boil-pinto, the other end of the said bed.- plarle being uneloilod end on the upper or ine; the connecting-min "vi-mil. side furnishing o seat or support fore pnenmniie cylinder 0, soldered to said plate or otherwise suitably eeonreil thereto. Also on liie upper aide of illlO ezziri pinto re around the slot n, is formed on upwardly-projeeting flange a", tile llliililf} face of which ooincidos' with line inni-r'ie Wells of the slot, Boid ineirlo wells of the Silltl. flange (1 serve as beam ings for it roller (1, attach-oil to the arm 11,

Trill be hereinafter more fully described, and also form a l; the upper edne El. slidewny for o. sliding plate j, which lies in. line or approximately in. line with the longitudinal axis of the pneumatic cylinder 1;. 'llieenid eiiiling pinto f is threaded at its anal toward, mill (1' lilo :illt-llflihlfiil (Z, which extends. inwardly in o {Mild cylinder where lilo Enid rod is pro- Viciorl n L n lis'l -onl1en(l g, of leather, backed by e we oone zrneiion adopted ho secure a. proper impervious ill; in the cylinder. The said sliding plate j in provided with or receives the upper end of n slurilj", which extends llOWl1- n'zirdiy through the slot o and upon which is arranged the roller 0 above referred to, and at tile lower end of swirl stud fastened the eonneoliggqirm b, which extends to ziyplote h adapted to lie fmsionocl'to the top of the door ii it will unnerslood that, the boil-plate no is lei; into the top of lhe floor-casing m and fastened by screws 11 in Snell position that its 1' or liililfil face is flush with the-surface oeeing'. Enid pinto is disposed directly nlloro-l-lie cioor when normal position orin the some vertical plane, and the casing m is ll washer or of any other suitable deeply recessed to receive the parts carried 1 by said bed-plate.

The parts of the check are so arranged and disposed that when the door is opened in one direction or in the other the piston is drawn out of its cylinder and an inflow of air isioc casioned through the valve 1 at the end of the said cylinder. Upon releasing the door a suitable spring, arranged at the hinges 1 of to the door or upon the piston, as shown in Figs.

3 and 4 and marked it, servesto close said door automatically against the body. of air contained within the cylinder. Said cylinder is provided at its rear end with a leak-hole 0,

:5 adapted to permit a slow outflow of the-confined air, so that the door impelled by the spring gradually and slowly closes as permitted by the air slowly outfiowing through said leak-hole. jlhe speed of the outflow is and 22 may be regulated and controlled by a screw p, which enters the outflow-opening and tends to close the same, the screw being held in said outflow-opening by a spring q and nut'q, the

so that the latter holds the screw into the out-v passage openingo with greater or less firmness, thus regulating the degree of pressure required to open the outflow-valve.

To permit a free infiow'of air to the interior of the cylinder when the piston is drawn outwardly, an inwardly-opening check-valve r is provided at the end of the cylinder. This 40 valve may be of any suitable construction to be unseated by the inflowing air and firmly seated by outflowing air to prevent any as cape of. the compressed air, except through the leak-valve 0..

5 To secure compactness and reduce the strain on the door, we prefer to employa doorclosing spring :70 in connection with the pneumatic piston-rod d, the spring being arranged between the head of the piston and a bearing s, fastened to the bed-plate 0. outside of the said piston. The said spring is coiled around the piston-rod d and tends to close the door against the outflowing air, as above indicated. Obviously thissprin g could be dispensed with and springs employed at the hinges in any usual manner;

Itwill beseen from the foregoing description-ef our construction that the bedplate a, yrith al'l'the parts it supports when appiied'to a door, lies out of sight in the recesst in the door-frame or casing, with the lower surface .of'said'bedmlate flush with the surface of the door-frame. The said recessis' on t. directly top of the door, as doesalso the plate h, and

thus all the parts are unnoticeable and a very pleasing appearance is secured. When the door is opened, the connecting-arm is the only part broughtinto prominent view.

Where our improved device is applied to a door opening in only one direction, we prefer to use a connecting-arm b and-plate h, as 7 5 shown in Fig. 3; but in connection with a double-acting door it becomes necessary to use the slightly-modified form shown more particularly in Figs. 2 and 7, so as to permit a free swing to either side. Furthermore, while we have shown the cylinder 0 and cooperating parts circular in cross-section it will be evident that to enable the same to be fitted into anarrower recess or space, such as would be provided by a thinner door, the said cylinder may be oval and inserted edgewise. Other slight changes and modifications may be made without departing from the spirit and scope of the invention.

Having thus described the invent-ion, what 99 we claim as new is- 1. In a door-check, the combination of a plate adapted to be sunk into a recess in the top of the door-frame directly above the door when in closed position, said plate'being Ion-= gitudinally slotted at one end and having at the opposite longitudinal sides of said slot upwardly-projecting ribs, said ribs forming at their edges slideways for a piston-slide and at their inner faces formingbearingsurfaces roe for a roller, avalved cylinder secured longitudinally upon the upper surface of the plate at the end opposite the said slot and adapted to lie in the recess in the door-frame, a piston working in said cylinder and having its outer to 5 end adjustably connected to a slide arranged on said slideways, a pin pivotally arranged in said slide and extending downward through. the slot, a roller arranged on said pin in said slot, and an arm adapted to lie beneath the 1&0

slotted portion of the plate when the door is closed and having its end next the cylinder pivoted on said pin and its opposite end pivoted to the door, substantially as set forth.

2. In a doorcheck,'the combination of a n5 plate slotted near one end and havinga valved cylinder on the nnslotted end arranged inline, with the slot,'a piston working in said cylinder, a slide at the outer end of said piston and reciprocating. at the upper side of the-slotted 12o plate longitudinally slotted and flanged on the inner side fora portion or its-length and also having at its'inner sidea valved cylinder :36

longitudinally-disposed at the unslotted end of said plate, a piston working at one endinsaid-cylinder and at the opposite end connected to a slide, said slide arranged on the 656,843 inner efiges of the flanges, a roller arranged We have hereunto set our hands this; 20th day betweeneaid flanges, an arm serving to 0011- of June, 1899.

neet the slide with the door and a pivotal pin ENOS H. HARRISON.

connecting the arm, slide and roller and hold- V THOMAS LAWSON. 5 ing the same in opei'ative position, substan- Witnesses: tially as set forth. i CHARLES H. FELL;

In testimony that we claim the foregoing (L B. PITNEY.

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