April 8, 1924. 1,489,447 H. L. LEEB TRAY RAISING MECHANISM Filed Sept. 17. 1921 N 3 N INVENTOR. .i. M
BY M r/ 173M l I ATTORNEY.
Patented Apr. 8, 1924.
VUNITED STATES PATENTOFFICE HENRY L. LEEB, OF SOUTH ORANGE, NEW JERSEY, ASSIGNOR TO THE PRO-METHEUS ELECTRIC COMPANY, OF
NEW YORK, N. Y., A CORPORATION or NEW YORK. f
Application filed September 17, 1921.-
To all whom it may concern.
Be it known that I,.HENRY L. LEEB, a citizen of the United States, residing at South Orange, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Tray-Raising Mechanism, fully described and repre sented in thefollowing specification andthe accompanying drawings, forming a part of t e same. V
This invention relates to tray raising mechanism and has for an object to provide a. simple mechanism for raising and lowering a tray in a receptacle.
The mechanism affords a support for it tray from which the tray may be readily removed and a connection with the cover of the receptacle for raising the support when the cover is opened and lowering the support when the cover is closed.
In carrying out the invention I provide a. tray support rigidly connected to a supporting link which is pivotally secured to the hinged cover of a receptacle, and means for constraining the movement of the link in suchmanner that as the cover is] turned on its hinge all positions assumed by the link are parallel to eachother so that the tray support is not tipped when in itsmovement.
While the tray raising mechanism may be applied to receptacles of all sorts it is particularly useful when applied to a sterilizer as a means for raising and lowering the perforated tray in which the instruments to be sterilized are supported. In'the accompanying drawings, therefore, I have illustrated the mechanism as applied to the sterilizer. 7
In these'drawings: a
-,Fig. 1 is an endelevation of a sterilizer having a tray'raising mechanism incorporating the invention, one side of the water receptaclebeing broken away;
Fig.2 is a front elevation of the sterilizer, showing the front of the water receptacle broken away f Fig. 3 is a detailed sectional view taken on the line 3-3 of Fig. 1 and showing the connection between the link, the support and the guide. ,7
The sterilizer shown in the drawings has a casing 10, the upper portion 11, of which serves. as a water receptacle. The wateris lowered by movement of.
serial No. 501,296.
usually kept at about the level indicated by the dotted line. 12. Within the casing 10 belo-w-thebottom of the-receptacle 11 may beprovided electrical or other means for heating the water in the receptacle. Thereceptacle-is provided with a hinged cover 13. Within the receptacle 11 is aperforated tray 20 the opposite ends of which are supported on movable tray supports 21, 21. The tray supports 21, 21 are Open so as to permit the tray to be lifted from them. They are most desirably made in the form of angles as shown and each of them is shorter than the width of the receptacle 11. ,Their supporting surfaces 22 aresmooth so as to permit sliding of the tray upon them.
hetray support 21 is carried by a supporting link 23 which is pivotally connected to the cover 13 at 24. The tray support 21 and the link 23 arerigidly secured together so that they make each other.- In order to prevent the tray support 21 from. tipping as it is raised or the cover, means are provided for constraining the movement of the supporting link 23 in such a way that as the cover moves all positions assumedby the link are parallel'to each other; It willv be noted that as the cover' l3 is turned about its hinge-the pivot point of the link 23.will move in the are indicated by the dotted line A. cans are provided for constraining a point of the link 23 spaced from its pivot point to move in an are similar to the are A sothat the direction of :thelinkwill not change as the cover is move In the form illustrated the. constraining means for the link 23comprises a guide 25 which has outwardly turned ends 26 secured to an. inner wall of the receptaclell. The guide25 contains a slot 27 which has the form of an are similar to the are A. To the link 23 near its lower end is secured a pin 28 which passes-through the slot 27 inthe guide 25. The pin is provided with a head 2.9,to prevent it from sliding out of the slot. Asillustrated in Fig.3 the pin 28 may serve also as a rivet tosecure rigidly together the tray support21 and the link 23. The support and the link are most desirably secured together at such an angle that the support extends horizontally, as illustrated.
a fixed angle with a 21 is carried and the guide 25 are in the same way as the link 23 guide '25.
The operation of the device described is as follows lNith the cover open and the parts in the position illustrated in the drawing the instruments to be sterilized are to be placed in the tray 20. The cover is then closed. During this movement each end of each of the links 23, 23 move in similar arcs so that the tray suppo-rtsQl, 21' remain always horizontal. During the lowering the supports are moved towards the front of the tank 11 (to the right in Fig. 1), their supporting surfaces 2:2 sliding under the tray 20 which is constrained against forward movement by engagement of the inner wall of the receptacle 11. The lowering of the tray plunges the instruments into the hot water in the tank 11. After the sterilizing has been completed the cover 13 is opened, raising the tray to the position illustrated in the drawing. The instruments may then be removed from the tray or, if desired, the entire tray may be lifted from the supports 21, 21 and removed from the receptacle.
I wish it clearly understood that the invention has been described in connection with a sterilizer merely for the purpose of illustration as it is applicable to many other sorts of receptacles. Furthermore, the word tray should be understood in a broad sense as covering any inner receptacle or article-support which may be placed within the receptacle, regardless of whether or not such inner receptacle or article-support is customarily referred to as a tray.
Many changes may and arrangement of without departing from the invention. lVhile'I shall not attempt to mention all such changes, I wish to note that it is not essential that the constraining means have the form ofslotted guides.
What is claimed is:
1. Tray raising mechanism for a receptacle having a hinged cover, comprising a supporting link pivotallyv secured to the cover, means for constraining the link so that during the movement of the cover all positions of the link are parallel to each other, and a tray support rigidly secured to the link.
2. Tray raising mechanism for a receptacle having a hinged cover, comprising a supporting link pivotally secured to the cover, means for constraining the link so that, during the, movement of the cover all positions, of the link are parallel to each other, and a tray support rigidly secured to the link at such angle thereto as to extend horizontally.-
3-. Tray raising mechanism for a receparranged and the be made in the form the parts described tacle having a hinged cover, comprising a link pivotally secured to the cover so that its pivot point moves in an arc as-the cover is turned on its hinge, means for constraining a point of the link spaced from its pivot point to move in an are similar to the arc in which the pivot point of the link moves so that the direction in which the link extends remains unchanged during the movement of the cover, and a tray support rigidly secured to the link.
f. Tray raising mechanism'for a receptacle having a hinged cover, comprising a supporting link having its upper end pivoted to the cover so that said upper end moves in an arc as the cover on its hinge, means for constraining the movement of a point of the link spaced from its upper end to move in an arc similar to the are in which the upper end of the link moves so that the direction in which the link extends remains unchanged movement of the cover, a tray support rigidly secured to the link and having a smooth supporting surface upon which the tray may slide. 7 5. Tray raising mechanism for a receptacle'having a hinged cover, comprising a supporting link having its upper end pivoted to the cover so that said upper end moves in an are as the cover is turned on its hinge, means for constraining the movement of a point of the link spaced from its upper end to move in an are similar to the arc in which the upper end of the link moves, and an open tray support rigidly secured to the link and having a smooth supporting surface upon which the tray may slide and from which it may be lifted.
6. Tray raising mechanism for a receptacle having a cover, comprising supporting strips located adjacentto opposite inner walls of the receptacle and having supporting surfaces adapted to extend under opposite ends of the tray, and a rigid connection between each of said strips and the cover arranged to retain the strips always horizontal and to depress and raise the strips as the cover is closed and opened. I
7. Tray raising mechanism for a recep-, tacle having ahinged cover comprising supports for opposite ends of tray located adjacent opposite inner walls of the receptacle, a link rigidly connected to each of said supports and pivotally connected to the cover, guides secured to opposite inner walls of the receptacle and each having an are shaped slot,-and a pin extending from a point of each link spaced from its pivot point through one of said slots.
8. Tray raising mechanism for a receptacle having a hinged cover comprising angles located adjacent to" opposite inner walls of the receptacle and each having a during smooth surface extending under one end of the tray, links having their upper ends pivoted to the cover, guides secured to opposite inner walls of the receptacle and each containing an arc-shaped slot, and two rivets each serving to secure together one of the angles and one of the links and having an extension passing through the slot in one of the guides.
9. The combination with a receptacle having vertical inner walls, of a horizontal tray suppoit having a smooth supporting surface, actuating mechanism for said support adapted to give it simultaneous vertical and horizontal movements in the receptacle, and a tray having a sliding engagement With the supporting surface of said support and constrained against horizontal movement by a sliding contact with the inner Wall of the receptacle.
whereof I have hereunto set presence of two subscribing In testimony my hand in the witnesses.
HENRY L. LEEB. Witnesses:
A. JAREcKY, HILDA M. BECK.