US1690952A - Doorcheck - Google Patents

Description

Nov. 6, 1928.

' 1,690,952 J. C. SCHMIDT ET AL DOOROHEGK Filed May 18, 1927 2 Sheets-Sheet 1 INVENTOR5 ATTORNEY Nov. 6, 1928. 1,690,952

J. C. SCHMIDT Er AL DOORCHBCK Filed lay 18, 1927 2 Sheets-Sheet 2 medium of a cap Patented Nov. 6, 1928.

UNITED STATES PATIENT OFFICE.

JOHN C. SCHMIDT, O! CHICAGO, AND WILLIAM. EICHHOLZ, OF CICEBO, ILLINOIS.

nooncnncx.

Application filed May 18,

l This invention relates to certain novel improvements in door checks and has for its principal object the provision of an improved construction of this character which will be highly efficient in use and economical in manufacture.

Among the salient objects of the invention is to provide a door check, of the character hereinafter described, which will function to prevent slamming action of the door when moved into closing position either manually or by an outside e ent and whereby mechanism is provided w ich is put into operation .by the opening of the door to yieldablyresist the closing movement of the door without totally stoppin the door in such movement. A further 0 ject of the invention is to provide a door check, of the character hereinafter described, which comprises mechanism for ieldably restraining without stopping the oor during its 0 ening and closin movement whereby the oor will gradual y close in the action of a slow steady movement without the usual chatter or vibration.

Other objects will appear hereinafter. The invention consists in the novel combination and arrangement of arts to be hereinafter described and claime i The invention will be best understood by reference to the accompanying drawings, showing the preferred form of construction and in which: Fig. 1 is a transverse vertical sectional detail view of the invention; Fig. 2 is 1 detail view taken substantially on line 2-2 of Fig. 1;

I Fig. 3 is a perspective view of certain of the'braking elements embodied in the invention; 1 Fig. 4 is a'lperspective view of an operating arm or be crank embodied in+the invention; and

Fig. 5 is a diagrammatical plan view showing the invention associated with a door and a door casing. Referring more partielualrly to the drawings, showing the preferred form of construction, a housing is indicated at 10. This housin has formed as an integral art thereof brac ets 11 which are ada te to be attached to a door 12 through t e medium of suitable connecting elements 13 The housing 10 has its open top closedthrough the plate 13 sedured to the housthe medium of -sc'rews 14.'

- ing 10 throug 1927.. Serial No. 182,406.

This cap late has a centrally located boss'15 ,formed thereon. and formed in thisboss 15 is 8..08I1t1'81 bore 16 for reasons hereinafter set forth. The housing 10 has formed therein a centrally located here 17 and the lower end. portion, termed for'convenience, the'base' 18, is enlarged and has a hollow interior 19. The bore 17 opens excentrically with respect to the interior 19 of the base 18 for reasons hereinafter set forth. The base 18 is closed through the medium of a suitable cap 20 secured to the base by means of screws 21;

Rotatably arranged in the bore 17 is a cylinder 22. This cylinder 22 at its lower end portion is open and provided with an enarged flange 23 which enga es the interior wall of the bore 17. Forme as an inte part of the cylinder 22 is a. stud 24. stud 24 has a cylindrical ortion 25 which works in .the bore 16 and tted to the outer "end portion 26 of the stud is an arm 27. This al his arm 27 has an opening 28 formed therein with .one side of, the opening provided with a flat surface 29 adapted to engage a flat surface 30 formed on this outer end portion 29 whereby to prevent rotation of the arm 27 independently of rotation of the stud 24. The arm 27 is held from displacement from the stud 24 through the medium of a. nut 31 threaded upon a threaded portion 32 of the stud and against a lock washer 33. Formed in the stud 24 is a passage 34 and arranged at a predetermined point in this passage is a reduced portion 35 having a threaded opening 36 formed therein. The lower end portion of the passage 3 tis restricted to provide a seat 37 adapted for engagement with the tapered end portion 38 of the needle39. This needle 39 has an intermediate portion 40 threaded for threaded engagement with the threaded opening 36 and "the exterior portion of the needle provides'a -finger cap 41 wh'erebyto facilitate adjusting the needle relat Embracing the -cylinder 22 and arran in the housing 10 is'a coilspring 42. en

the various parts are disposed as shownin Fig. 1 this spring 42 is under tension, this beingbrought about in a manner to beset I I forth hereinafter. One end rtion 43 of this coil .spring is connected to. e late 18 as at 44 inany. approved manner. e opposite end portion 45.0f the sprin 42 is connected to the flange 23 of the cylin er 22 in any approved manner.

Movable in the cylinder. 22 is a piston. 46.

ve to the seat 37.

v I I This i'ston 46 hasa. passage 47 formed therein an this passage has its interior portion 48 ill enlarged and provides a. seat 49 for a' pellet 50arranged" in the enlarged portion 48 of the passage.

Associated with the, piston 46 is a packing structure 51 of any approved construction whereb to revent the escape of air between the cylindrleal wall of the piston and the interior wallof the cylinder 22; The piston 46has connected thereto a bolt 52. I.h1s bolt 52 has a threaded end portion 53 and threaded upon this threaded end portion is a nut 54 set in a counter sunk portion 55 of the piston 46. The opposite or exterior end portion of the bolt 52 provides a slotted head Pivotally connected to this slotted head through the medium of a pin 57 is one end ears 62 and ears 64 is a crank 61.

portioniof a link 58. The opposite end portion of the link 58 is connected, by means of a. pin 59, to a slotted end portion 60 of a bell The flange 23 of the cylinder 22 has formed as an integral part thereof spaced ears 62 and carrie by t ese ears 62 is a pin 63 which provides pivotal connection between the ears.

and the bell crank 61 which in the present instance is disposed between these ears 62.

' Opposite the ears 62 the flange 23 has formedfas an integral part thereof spaced ears 64 and slidab y arranged between the ush bar 65. This push bar 65 is substantial y U-shaped to provide a lo 'tudinal slot 66. At the end portion' 67 d f lzhe push bar 65 there is formed slots 68 which extend diagonally in a transverse direction with respect to these end portions and o rable inthese slots are end or tions 69' o a pin 70. This pin 70 provides connection between-the arm 71 of the bell crank 61 and the push bar.65. The push bar I 65 has formed at its bight I rtion 72 a trans- I ing 74. This ear 73 is adapted to be pro ect-' I substantially arcuate in p an' view and has. up roved manner a' verse ear 73 provided wit a vertical 0 ened the slotted head 75 formed as an integrai part of a brake shoe v76. This head 75 has aligned openings 77 formed therein and these openings are adapted toregister with the openings 74'and projected in these openingsis apin 78 which provides pivotal conneotlon between the brake shoe 76. I

The brake shoe 76 in the resent instance is push bar and the a ong its longitudinal peripheral edges.

- Formed in the end portions 67 of the ush bar 65 are bores 82 and projected in t ese bores 82 against the action of spring members ition against the'sprin cylinder 22. The piston 46 in the cylinder 22 forces the air out 83, arranged in these bores, are pins 84 carried by a'plate 85 havin formed as an in tegral' part thereof a hea 86. This head 86 has a beveled surface 87 adapted. for wiping engagement with the interior wall of the 7 base 18.

The arm 27 has its outer end portion 88 pivotally connected as at 89 to a link 90 iv-s otall connected to a bracket 91 secure to;

:the cor casing 92 with which the door 12 is t associated.

In operation, when the door 12 is moved to open position with respect .to its casin the cylinder 22 will be rotated by action 0 the arm 27. In rotation of this cylinder 22. the sprin 42 is placed under tension. When the cylin er 22 rotates the ears 62 and 64 act to rotate the push bar and'its brake shoe. As

"herein indicated the bore of the cylinder 22 opens excentrically with res act to the bore 19 of the base 18 and when t e cylinder22 is V rotated the brake shoe will have wiping engagement with the wall of the bore 19 and as rotated the brake shoe will act upon the push bar to move the same in a longitudinal di-' rection. As this push bar moves in this lon gitudinal direction the bell crank 61 is pivoted about its pin 63 and pivots the end ortion 60 thereof in an upward direction. his pivotal movement of the bell crank in this irection will act u on the link 58 and ush the piston 46 inwar to exhaust the air rom the cylinder 22. At t is point it will be noted that the spring 42 is under tension, the piston 46 in its outer position with respect to the cylinder 22, and-the brake shoe in a position furthest from the centralaxis of the cylinder .2201 the bore thereof. When the door is released for movement into closing posiurged into closing positionby the'spring 42 the brake shoe having wiping en agement with res ect to the interior wall 0 the bore 19 will 0 e'ck this closin movement sufficient .to permit the door to c ose at a slow steady pace. As the door is moved to closing pos1- tion by theaction of the s ring 42, the brake shoe-46 acts upon the pus bar 65 and urges this push bar to move'in a longitudinal direc- 61in an op osite direction to that herein mentioned an as the bell crank pivots in this through the passage 34 and by reason of the slow escape of the air through this ass'age 34 the piston will co-act with the bra e'ehoe directionthe link 58-.will be caused to act on i to check the movement of thedoor sufliciently enough to permit the door to close at a slow even pace.

As the piston 46 is movedoutwardly from the cylinder 22 air enters the cylinder 22 through the passage 47, it being pointed out i that as the air passes through this passage 47 into the cylinder 22 the pellet 50 will be raised by the air pressure from closing whichwill function efliciently to control the speed of movement of a door into door closing position and that the device may be used on any type or weight of door.

It will be' important to note that as the hell I crank 61 pivots in either of those directions the pin 70 will work along the edges of the slots 68 and thereby prevent chattering or vibration of the push bar during either of those two movements.

While we have illustrated and described the preferred form of construction for carrying our invention into effect, this is capable of variation and modification, without d e.

arting from the spirit of the invention. e, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail ourselves of such variations and modifications as come within the scope of the appended claims.

Having thus described our'invention what we claim asnew and desire to protect by Letters Patent is: I v v 1. A door check including a housing-havinga bore formed therein and comprising a base provided with a hollow interior, said bore excentrically opening into the interior of said base, a cylinder rotatably arranged in thebore, a spring member embracing the cylin der and having'one end ortion connected thereto and an opposite en rtion connected to the housing means for imparting opening movement of a door to said cylinder, a piston movable in the cylinder, a brake shoe rotatably arranged in the interior of said base and having wiping en a ment with respectto the interior wall 0 t e base, a push bar having connection with said brake shoe, and

means operable by movement, of said cylinder for moving the piston in one directionin the cylinder for urging said push bar to actuate said brake shoe for brakingengagement with'res ect to said base. i

' 2. A door 0 eck including a housing having a bore formed therein and comprising a base provided with a hollow i'nterior, said.

bore excentrically opening into. the interior of said base, a cylinder rotatablyarranged in the bore, a spring member embracing'the cylthe cylinder, a valve structure I passage .of air through said. passage, a, coil and having wiping en agementwith respect to the interior wall of the base, a push bar having connection with said brake shoe, and means operable by movement of said cylinder for moving the piston in one direction in the cylinder for urgingsaidrpush bar to actuate inwardly.

said brake shoe for braking engagement with respect to said base, said means includin a bell crank pivotally supported by said cylin-' der, a slot and in connection tween one end portion of t e bell crank and said push bar, and a' link connection between the opposite end portion of the bell crank and the piston.

ing a central bore formed therein, a base formed on' the housing and havin a hollow interior arranged concentrically with res ect to the bore, a cylinder rotatably arrange in the bore and having a stud extendin exterior of the housing, said stud being provided with a passage to permit exit of air from within the cylinder, a valve structure controlling passage of air through said passage, means operable by the cylinden'for resisting rotation of the cylinder in one direction, a piston operable in the cylinder, a brake shoe operable on the interior wall of the base, a push bar rotatable with the cylinder and having connection, with the brake shoe, a head bearing member having engagement with said wall and having slidable and yieldable connection withthe push bar, said push bar having an end portion provided with slots ar- 3. .A door-{check including a housing havranged diagonally and transversely with rea bell crank pivthe cylinder, a in provber carried by the piston, and a link connection between said last mentioned member and the opposite end portion of said bell crank.

'inga central bore formed therein, a base formed on the housing. and havin a hollow interior'arranged concentrically with res t to the bore, a cylinder rotatably arrange in the bore and having a stud extending exterior of the housing, said stud'being provided with a passage to permit exit of air from within springeinbracing the cylinder and having one end P01131011"CODDGCtGdthGIBtO and an opposite end portion-connected to the brineing for resisting rotation of said cylinder in one direction, a piston operable in the -c linder, a brake shoe operable on the interior slots and provi ing con-' A- door check including a housing hav controlling wall of the base, a push bar rotatable with the cylinder and having connection with the brake shoe, a head bearing member having engagement with said wall and having slidable and yieldable connection with the push bar, saidpush bar having an end ortion provided with slots, arranged diagona ly and transversely with respect to the sides thereof,

a bell crank'pivotally supported by the cyl- 1 inder, a pin projecting through said slots and providing connection between one end Eortion' of the bell crank and the push bar, a ead bearing member carried by the piston, and a link connection between said last mentioned member and the opposite end portion of said bell crank.

In testimony whereof we afiix our signatures. 7

JOHN G. SCHMIDT. WILLIAM EICHHOLZ.

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