US1930490A

US1930490A - Checking device

Info

Publication number: US1930490A
Application number: US540370A
Authority: US
Inventors: Righetti Homer
Original assignee: Individual
Current assignee: Individual
Priority date: 1931-05-27
Filing date: 1931-05-27
Publication date: 1933-10-17
Anticipated expiration: 1950-10-17

Description

96%. 17, 1933. H RlGHETT] 1,93,43@

CHECKING DEVICE Filed May 27. 1931 FIG. 1. )2

III

IN VEN TOR.

BY fly? 1 ATTORNE Patented Oct. 17, 1933 I CHECKING DEVICE Homer Righetti, San Francisco, Calif., assignor of one-third to William McMillan and one-third to Cerf Rosenthal, both of San Francisco, Calif.

Application May 27, 1931. Serial No. 540,370 g 11 Claims.

This invention relates to devices for checking the thrust of one body relative to another, and more particularly the invention relates to the type of checking devices in which is provided a 6 fluid pressure medium adapted to flow through ports from one chamber to another, responsive to the relative movement of bodies to which the device is attached. The device is capable; of numerous uses, but for purposes of exemplification m has been illustrated and described herein with relation to a door which has movement relative to a door jamb.

Objects of the invention are to provide a checking device eflicient in operation, economical in construction, with a minimum number of operating parts, which occupies a relatively small space and may be obscured from view within the body to which the device is attached. Further objects are to provide a checking device in which a fluid pressure medium flowing through ports from one chamber to another absorbs the thrust on one body relative to another; to provide in a. checking device a tension means having varying degrees of tension according to a; change of length -of leverage; to provide a door closing means wherein the force or leverage for closing the door is progressively increased as the door approaches a closed position from an open position; and, generally, to improve upon known types v of checking devices of the character described.

With the above mentioned and other objects in view, the invention consist in the novel construction and combination of parts hereinafter described, illustrated in the accompanying drawing '35; and pointed outin the claims hereto appended;

it being understood that various changes in the form, proportion, size and minor details of construction within the scope of the claims may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

To more clearly comprehend the invention, ref erence is directed to the accompanying drawing, wherein--- Fig. 1 is abroken horizontal view on line l-1 of Fig. 2, partly in section.

Fig. 2 is a vertical section of cylinder, and showing wedge member and tension device in full lines.

Fig. 3 is a horizontal view partly in section of a modified form of tension device.

Referring to the drawing, wherein like characters of reference designate corresponding parts,5 represents a door of any'usual type, and 6 represents generally a door jamb, consisting of studding '1 and finish frame a, the latter. being built around the studding and secured thereto by any suitable means, suchas nails 9, and providing a box-like chamber 10. The door is provided with a. pintle hinge 11 having a pair of

butts

12 and 13, the former secured to the jamb, 6-and 60. the latter to the door 5, as by screws 14. The butt 1 13 is provided in spaced relation tothe pintle with a tongue 15, preferably arcuate at substantially in horizontal cross section and wedge= shaped in the vertical front plane, and thebutt 5,

12 has opening 17 through which the wedge 15 is received, and also an opening 18 for purposes hereafter described.

Mounted in a recess 16 in the jamb and secured thereto in any suitable manner is'a frame 19 7 having spaced members adapted to guide a .cyl inder in reciprocal path, and as herein exemplified comprise opposing grooved r guides 20 which slidingly support for vertical reoiprocation therein a tubular member 21, preferably 751, cylindrical, which is provided .at opposite sides at its outer walls with rails 22 which have sliding relation to the grooves 20, so that the tubular member 21 may be vertically reciprocated relative to said grooves, excessive downward moveso mentbeing prevented by the .ends 23 of the grooves. The cylinder 21' is fenestrated in its vertical walls,

asat

24 and 25, for reception therethrough ofthe wedge tongue 15 as the door. is 5 swung on its hinges, the fenestration opening 24 adjacent the hinge being preferablyvertically longer and horizontally wider than the opening 25, since opening 24 must receive the'butt of the tongue 15 and also a flexible member 56, and opening 25 receives therethrough the vertically narrowed apex of tongue 15. The cylinder member is provided with. a head portion 26.which is adapted to bear on the upper edge of the wedge 15, as the dooris successively opened and closed, and the bearing on the wedge may be given anti-friction. qualities by mounting in the head a roller 27. .j The lower portion of the cylinder has a fluid pressure piston mechanism comprising within the cylinder walls a vertically 'slidable pistonwhich may be integrally formed, and having a bearing head 30, preferably conical on its upper bearing face, and provided with air vent opening 28, and a piston head 32, and therebetween 5 a connecting rod 31 of lesser transverse diameter. than the bearing head and piston head; provid ing, with the cylinder walls, a chamber 33be-'-. tween the bearing head and'the piston head, and w communicating with which, as at an opening 34,

. cylinder. and comprising,

is a by-pass conduit which extends from said chamber 33 to and communicates with a second chamber 36 in the cylinder below the piston head 32, as at opening 37, which latter opening has a suitable check valve 38, herein shown as a ball type, which opens to permit a supply of fluid A, such as oil, to flow into chamber 36 through opening 37 and checks flow in the opposite direction. I I

A second opening or port 39 is provided in chamber 36 and connects with the by-pass conduit 35

intermediate openings

34 and 37, and the flow through which is controlled or regulated by a suitable valve which may be a set screw 40 mounted through the wall of the'tubular member, and provided with a cap nut 41. The valve may be manipulated through opening 18 in the butt 12. The bearing head 30 and piston head 32 are snugly slidable within the cylinder, and,

their upward reciprocation may be accomplished and made more quickly responsive by a compression spring 44 mounted in chamber 36 beneath the plunger 32, this latter spring 44 also serving to vertically depress the cylinder walls as the door is opened and-the tongue 15 thereby removed.

A second by-pass 42 isprovided from chamber 33 to 36, having a regulating valve or set screw 43, so that when piston 32 in its downward movement passes the port or opening 29, the fluid in chamber 36 may readily, and with very little resistance,be forced into chamber 33. V

A tension means generally indicated 45 is also provided preferably in spaced relation to..the in the exemplification herein, a vertically disposed shaft 46 mounted against axial. rotation at eachits ends, asat 4'7, to links 48, which have pivotal connections 49 to the'frame19. A drum 50 having a radial face is mountedeccentrically on the shaft and preferably iscycloidalin plan but. may also be of .other shapes to. meet particular conditions. The drum is adaptedffor rotation on shaft 46 to coil and uncoil aspring 51 secured at one end'to the drum, as at 52, and at the. other end fixedly secured to aibracket 53,-as at 54, the tension of the spring being adjustably regulated by any suitable means such as a. screw driven worm 55.1 An elongated flexible member 56, preferably a tape, chain or. cable, is securedat one end to the butt 13, preferably. thy-releasable means, such as pin 5'7, and extends'tothe drum 50, passes around the radial face thereof and has its other end attached to the drum, as at 58. Inthe arrangement shown inFig. 2, a bracket 59 is provided, preferably integral with the frame 19, which extends from its point :of. mounting to a point adjacent the drum 50 and thereat mounts a roller bearing against whichthe drum 50 and its associated coiled flexible tape bears..-

, When the door is closed,-as shownin full lines in Fig. 1,, the arcuate tongue 7:15 .isdisposed through the

openings

24 and 25 of the cylinder, and. the entire cylinder, including the piston mechanism in the lower portion thereof, isin a raised position, due to head 26 or roller 27 bearing on the upper edge of the: tongue. In this position-bearing head 30 is depressed by the lower edge, of-the wedge tongue, and asupply of fluid, such as oil, occupies chamber 33, and the drum 50 .is in'position where the tape-or cable hasa tangentialpoint B relative. to the drum which is the shortest leverage reach ordistance of the eccentric mounting. of the drum on shaft 46,- in which position the spring 51 is set for-low tentongue is carried outwardly with the hinge butt 13, which action permits the cylinder 21 to drop downwardly partially by gravity, and partially actuated by spring 44 and the bearing head 30 against the lower edge of the wedge 15. As the wedge is withdrawn from the cylinder, the piston in the cylinder-is raised by spring 44, and the fluid in chamber 33 is pumped or forced by the upward movement of piston head 32 through-the by-pass 35 and through the opening 37, into chamber 36. The end of the tape 52 is likewise carried outwardly by the butt 13 and rotates the drum 50 on its eccentric mounting'on shaft 46, and as the disc is thus rotated, the tension of the spring 48 increases, but the leverage distance of the tangential point B of the tape and drum is increased with relation to shaft 46 so as to compensate the increased tension of the spring.

- In the device of Fig. 1, this action is accom plished by the mounting of the shaft 46' in the pivoted links 48. The stress or pull on the tape 56 maintains the drum 50' in contact with roller 60 and as the drum is rotated byunwindingthe tape from the drum, due to outward movement of thedoor 5, 'theleverage reach or distance of 'the tangential point relative to'the drum'mounting on shaft 46 increases, which causes the links- 48 to swing on pivots 49 away from the vertical plane of tape56; and vice versa, when the door is in the course of closing, the leverage reach ordis tance decreases and the links 48 swing back toward the vertical plane of tape 52. i I.

When the door swings from anopen-position to a closed position, the apex of the tongue wedges between the cylinder head roller 27' and the upper face of the bearing head '30 of the piston, thereby raising the cylinder and simultaneou'sly depressing the piston, including piston head 32." The check valve'38 being closed to outward flow,'the'piston head 32 forces the fiuid to cham-- ber 33 through the relatively smaller opening or port 39, and thus provides a checkto the action of spring 51. As the door approaches the closed position, the'drurn 50 is reverselypivoted' on its eccentric mounting and gradually decreases the leverage distance to the tangential 'pointB of disc and tape, thus increasing the poundage of leverage, though the spring 51 is decrea'singits tension.

This arrangement provides for compensating the decrease and increase of spring tensionby automatic adjustment of the leverage factor,-'and' preventsexcessive tension on the door when itis opened, yet provides'suflicient tension'when the door closely approaches its" closed'position, so'asto completely closethe door against the usual and well known action of its latch (not'shown): When the door has reached a position where it is almost but not completely closed, the-piston head'32 passes the opening 29 of thesecondary by-pass 42 which now permits the fluid to be forced from chamber 36 to chamber 33 with substantially no resistance, so that the door snaps closed against the action of the door latch. 7

There is preferably included inrthe structure,

a roller 61 over which the flexible member or tape. 52may glide, and which by provision of a spring.

actuated mounting member 62 may be adapted to serve as a stop for the door at certain positions by means of small lugs 63, 0f which there may be one or more in spaced recesses 64 which threadedly support same. 7

In Fig. 3 is shown a modification of a tension means in which the drum has a planetary movement on a fixedly positioned shaft 65, which corresponds to shaft 46 in Figs. land 2. In Fig. 3, the drum 50 rotates on shaft 65, and by reason of the eccentric mounting of the drum thereon, the leverage reach is increased and decreased by the planetary movement of the drum as it is rotated responsive to the winding or unwinding of the tape or cable 56. This modification while satisfactory requires more operating space in the recess 10 than is required in the structures of Figs. 1 and 2.

1. A checking deviceforhin'ged bodies adapted for relative movement, comprising a reciprocable tubular member having a fenestrated wall portion and adapted for mounting on one of said bodies, said tubular member being closed at one end and provided with a conduit communicating at spaced openings with the interior of the tubular member, a check valve in one of said openings, a piston member adapted for reciprocation within the tubular member and provided with spaced heads and a connection therebetween, a wedgeshaped tongue mounted on the other of said first mentioned bodies adapted for entry between an edge wall of said fenestrated portion and the upper of said piston heads, whereby said tubular 35- member and said piston may be relatively moved in opposite directions, and means whereby one of said first mentioned bodies may be moved relatively to the other of said bodies.

2. A checking device for hinged bodies adapted for relative movement, comprising a reciprocable tubular member having a fenestrated wall portion and adapted for mounting on one of said bodies, said tubular member being closed at one end and provided with a conduit communicating at spaced openings with the interior of the tubular member, a check valve in one of said openings, a piston member adapted for reciprocation within the tubular member and provided with spaced heads, and a connection therebetween, a wedgeshaped tongue, arcuate in horizontal plane, mounted on the other of said first mentioned bodies, and adapted for entry between an edge wall of said fenestrated portion and the upper of said piston heads, wherebysaid tubular member and said piston may be relatively moved in opposite directions, and means whereby one of said first mentioned bodies may be moved relatively to the other of said bodies.

3. A checking device for bodies adapted for hinged relative movement, comprising a fluid pressure cylinder mounted reciprocably on one of said bodies and provided with a conduit communicating with the interior of the cylinder at V spaced points, a piston adapted for reciprocation in said cylinder, means mounted on the other of said first mentioned bodies adapted to engage and thereby reciprocate said cylinder and piston each in an opposite direction, a tension device. comprising a pivoted bracket, a shaft mounted on the bracket, a drum mounted on the shaft, spring means adapted to rotate said drum, a flexible member connected at one end to one of said first mentioned bodies and adapted at the other end to wind on said drum, the axis of rotaone of said piston heads, a

tion of said drum being eccentric-to the radial face of the drum.

4. A checking device for bodies adapted for hinged relative movement, comprising a fluid pressure-cylinder mounted on one of said bodies and provided with a conduit communicating with the interior of the cylinder at spaced points, a piston adapted for reciprocation in said cylinder, means mounted on the other of said first mentioned bodies adapted to engage and thereby reciprocate said cylinder and piston in opposite directions, a tension device comprising a shaft, a cycloidal drum rotatably mounted eccentrically on'the shaft, spring means adapted to rotate said drum, a flexible member connected at one end to' one of said first mentioned bodies and adapted at the other end to Wind on the drum, the axis of-rotation of said drum being eccentric to the tangent point of said drum and said flexible member. I

5. A checking device for bodies adapted for hinged relative movement, comprising a fluid pressure cylinder mounted on one of said bodies and provided with a conduit communicating with the interior of the cylinder at spaced points, a piston adapted for reciprocation in said cylinder, means mounted on the other of said first mentioned bodies adapted to engage and thereby reciprocate said cylinder and piston in opposite directions, a tension device comprising a pair of pivoted links, a shaft mounted therebetween,. a drum mounted forrotation on the shaft, spring means adapted to rotate said drum, a flexible member connected at one end to one of said first mentioned bodies and adapted at the other end to wind on the radial face of the drum, the axis of rotation of said drum being eccentric to the tangent point of said drum and said flexible member. 6. A checking device for hinged bodies adapted for! relative movement, comprising a tubular member adapted for mounting on one of said bodies, said tubular member being closed at one end, a pair of piston heads mounted in spaced relation in said tubular member and adapted for reciprocation therein, said tubular member being provided with a conduit communicatingat spaced openings with the interior-0f the tubular member on opposite sides of one of said piston heads, a check valve in one of said openings, means mounted on the other of said first mentioned bodies adapted. to depress one of said piston heads within said tubular body, and means whereby one of said first mentioned bodies may be moved relatively to the other of said bodies. 7. A checking device for hinged bodies adapted for relative movement, comprising a reciprocable tubular member adapted for mounting on one of said bodies, said tubular member being closed at one end, a pairof piston heads connectedly mounted in spaced relation in said tubular memher and adapted for reciprocation therein, said tubular member being provided with a conduit communicating with the interior of the tubular member at spaced openings'on opposite sides of check valve in one of said openings, a Wedge-shaped tongue arcuate in horizontal plane mounted on the other of said first mentioned bodies adapted for entry between a portion of said'tubular member and the other 8. A checking device for bodies adapted for hinged relative movement, comprising a fluid pressure cylinder mounted reciprocably on one of said bodies and provided with a conduit communicating with the interior of thecylinder at spaced points, a piston adapted for reciprocation in said cylinder, means mounted on the other oi said first mentioned bodies adapted to engage and thereby reciprocate said cylinder and piston each in an opposite direction, a tension device comprising a pivoted bracket, a shaft, a member rotatably mounted eccentrically on the bracket, spring means adapted to rotate said rotatably mounted member, a flexible member connected at one end to one of said first mentioned bodies and adapted at the other end to wind on the rotatably mounted member, the axis of rotation of said rotatably mounted member being eccentric to the radial face of said member. 7

9. A checking device for hinged bodies adapted for relative movement, comprising means whereby stress of shock may be absorbed when said hinged bodies are moved toward each other, a.

rotatably mounted member having an arcual eccentric radial face, a flexible member connected to said rotatably mounted member and to one of said hinged bodies and adapted for Winding against said radial face, and means adapted to tension said flexible member.

10. A. checking device, for hinged bodies adapted for relative movement, including a pair of members having simultaneous reciprocation in opposite directions, means'including an arci'iate shaped wedge for causing saidfreciprocation during relative movement 'ofis'aid bodies,- a rotatably mounted member hav n arcual eccentric radial face, a flexiblememberconnected to said rotatably mounted member and to one of said hingedbodies' and adapted fonwinding againstsaid radial face, and means'adapted to tension said member, I, i s

11. A checkingdevice for rbodieshingedly connected for relative movement'comprising means mounted on one of said bodies including 'a compression cylinder, a piston 'slidable the cylinder and dividing the cylinder 'intoaflpairof chambers, said cylinder including a by pas's from'one chamber to the other chamber, a head member overlying ,the-cyhnden the head member and cylinder having relative reciprocation, and. the other of said hinged bodies; hav ihg fmounted thereon a wedge member ar'cuate plan adapted tolslidablyie ngage respective opposing faces of the head member and cylinder, and means whereby one of said. hinged bodies .may be moved relative to the other.['' 1.1" HOMER RIGHE'ITII.