US2696417A - Fixture for sterile instruments - Google Patents

Fixture for sterile instruments Download PDF

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US2696417A
US2696417A US219432A US21943251A US2696417A US 2696417 A US2696417 A US 2696417A US 219432 A US219432 A US 219432A US 21943251 A US21943251 A US 21943251A US 2696417 A US2696417 A US 2696417A
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cabinet
motor
trays
fixture
panel
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US219432A
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Jouk Leon
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CHARLES N BREYNER
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CHARLES N BREYNER
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B81/00—Cabinets or racks specially adapted for other particular purposes, e.g. for storing guns or skis
    • A47B81/04—Cabinets or racks specially adapted for other particular purposes, e.g. for storing guns or skis specially adapted for storing dishware

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  • This invention relates to cabinets provided with one or more mobile elements, the movement of which is controlled by a photoelectric cell.
  • the'invention relates to fixture for sterile instruments such as used for medical purposes in dentistry, otorhinology, laryngology, general surgery, appliance for storing dressings and also to cabinets for food products such as used in pastry shops, butcher shops, delicatessen stores.
  • Such cabinets are provided either with a door or a tray or other mobile element and with photoelectric cell means to control the movement of such mobile element.
  • the invention described herein covers the fixtures used to enclose the sterile instruments utilized by dentists or surgeons and also refers to the other applications indicated-in the above paragraph 2 (for all food industries).
  • the main purpose of this invention is the automatic opening of the cabinet when the practitioner 1 approaches with his hand to take an instrument, and this happens without it being necessary for him to touch any non-sterile part of the cabinet such as e. g. a handle.
  • the fixture includes at least one part which is mobile in relation to the main structure of the fixture and which allows, by being displaced, the access to the sterile instruments contained in the said fixture.
  • This motion is controlled by an electric motor.
  • the fixture also'includes means of emitting a pencil of lightor infra-red rays (which will be referred to hereunder as the light beam) which is made to pass in front of the mobile part and then onto a photo-electric cell.
  • the latter is connected with the motor in order to permit displacement of the said part in the direction which allows access to the instruments when the light beam is interrupted and in the opposite direction when the said light beam is reestablished.
  • the mobile element may consist of a drawer or tray having the function of carrying the instruments, and is mounted riding on the main, but also mobile, element. Or it may consist of a door or panel capable of shutting 01f the space in which are placed the instruments.
  • the fixture would include several riding trays holding the instruments, as well as a retractable panel, preferably of transparent material, placed in front of the trays, this panel being connected to the electric motor in such a manner as to move when the light beam is interrupted and before the trays ride out of the fixture.
  • Fig. 1 represents, in perspective, a form of execution of this fixture according to the invention
  • Fig. 2 is a view of an alternate method of execution, also shown in perspective;
  • Fig. 3 is a vertical section of the fixture in Fig. 2, however, showing it in a closed position;
  • Fig. 4 is a view similar to that given in Fig. 3, the fixture in this case being open;
  • Fig. 5 is a perspective drawing representing a practical method of carrying out the gearing device which controls the movement of the trays and of the retractable panel;
  • FIG. 8 is a schematic drawing of an alternate variant fixture, according to the invention.
  • the fixture 1 consists of a recess 2 and is equipped with trays 3 which can ride horizontally and thereby place themselves in this recess.
  • Means, not represented in the drawings, are foreseen to provide permanent sterilization, hot or cold, of the instruments placed on the trays 3.
  • a plate 4 of transparent material such as Plexiglass is mounted vertically on the fixture so as to shut ofi, when it isin a high position, the space wherein are located the trays when these are put back inside the cabinet.
  • the objects and instruments carried by the trays are thus kept isolated from the surrounding atmosphere and consequently are sterile.
  • a projector 5 is provided to send a light beam onto a photo-electric cell 6 after having been reflected on a series of mirrors such as 7. This produces a barrage of light which is necessarily interrupted when one approaches the hand to seize one of the instruments carried by the tray.
  • the recess must be sufficiently deep so that when the trays emerge they do not cut the light beam; if this were to happen, the trays would never reassume their original position.
  • the photo-electric cell 6 e. g. is disposed in such a manner, described hereafter, that when the light beam is cut, this brings about the lowering of the transparent plate. 4 and the exit of the trays 3- in the recess, and their return to their original position when the light beam is reinstituted.
  • the fixture does not possess a recess and the optical apparatus is placed a certain distance in front of the fixture so that the trays in their exterior position do not cut the light beam.
  • the light beam emitted by the projector 5 is transmitted to the cell 6 by the means of two mirrors 7a and 7b.
  • the trays 3 are fixed on guiding rails 8 which can ride on horizontal shafts 9 secured at their rear extremity to the body of the fixture. These trays have on each lateral side fingers (or catch pins) 10 which are lodged in grooves 11 found in the connecting rods 12, or in the case of the bottom tray the fingers are attached to the connecting rods.
  • the connecting rods 12 are jointed at their upper extremity, which is free, to small connecting rods 13, these themselves pivoting underneath the upper wall of the cabinet.
  • An electric motor 14 is connected by a belt 15 to a driving pulley 16 the axle of which is connected at each end to a drum 18.
  • a crank 24, with a finger 20 at its end, is secured to a shaft 17 fixed to pulleys 16 on each lateral side of the trays.
  • the drums 18 are 6 and 7 are electrical diagrams showing the con- 3 I mounted loosely on the shaft 17 and can be drawn by this shaft by means of lugs 26Zz'on the drums and lugs*26b" on the cranks, said lugs each extending over a sector of 90 and said lugs supported by bearings 33.
  • Theiielectric-motor 14 should preferablyibe a series motor, the same being-of thetyp'eiiin whichla change zin: direction of rotation can .benobtainedwbyt reversing direction of current running through. thewindioatorsi or: field in relation tothe :currentinthearmature of.:'the'..30 motor.
  • Terminals .2721 are connectedntowthe field-coil:27:of' motor 14.
  • the other :end of .coil 13% is connected' 'by'lead 134 to terminal 1350f a conventional amplifier 136;tho' otherterrninal .137 of the latter being connectedeto lead 146 by lead 138;”
  • The-input terminals 139,;1140' are connected: to the photo-electric tube-6 by leads 141,142,"
  • Switch 23 is openxwhen plate 4 is in itsuppermost position closing 6 thecabinets Movement of plate 4 downwardly. will cause I switch 23 to open.
  • - Switch 22 is closedby the lowermost tray whenzthe cabinet is closed, as shownin the position of Fig. 3, but is opened whenxthe. trays move to the open position of Fig. 4.
  • I Switches 22,23 are preferably acti-' vated-bycontactwith the lowermost tray and plate 4 in a conventional manner obvious to those skilled in the art.
  • Fig; 6 illustrates'theposition of Fig. 3 when the cabi-w net :is closed.
  • switch 23 is open and: switch 22'i's closed;
  • the circuit through the'armature 28 is open because switch 23 is open and the motor thereforeis stopped.-
  • the circuittozthe. photo electricncell is open andthe. relay 29 is deenergized,.lmoving switch arms 4% 41 from the 80 position of Fig; 6 to the position of Fig. 7.
  • photo-electric cell-w means .to control the. direction of Irotation-of said motor 2. and.. including means to project. a beam -adapted to be 1" interrupted by movement of an .operatofls .hand-radja'cent said .cabinet.
  • a cabinet-formedfwithsa frontop'en- 5 ing, a panel :slidable up and down at'thei' fIOH'C'OfTthC cabinet to close-randzopen-"said opening,wa pluralityof trays slidably mounted within said cabinet, a slottedlink interconnecting said trays,'"a diskrotatablymounted 'with in the cabinet electric motor control means to rotate said disk, a pin on said disk, a fork on one of-said trays engageable with said pin and a cable interconnecting said disk with said panel.
  • a cabinet formed with an opening, a panel to close said opening, a tray within said cabinet and movable through said openinganelectrio'motor within said cabinet, means controlled by said electric motor to first open the' panel and then project thetray through said opening uponrotating said motorin one direction, and for retracting said tray into the cabinet and then closing said-panel upon rotating said motor in an opposite direction and photoelectric cell means to control the operation of said motor.
  • said photo-electric cell means including means to project a light beam adapted to be interrupted by movement of the operators hand adjacent the cabinet.
  • a cabinet formed with an opening, a panel to close said opening, a tray within said cabinet and movable through said opening, an electric motor Within said cabinet, means controlled by said electric motor to first open the panel and then project the tray through said opening upon rotating said motor in one direction, and for retracting said tray into the cabinet and then closing said panel upon rotating said motor in an opposite direction, and photo-electric cell means to control the operation of said motor, means to automatically stop the operation of said motor after projection of said tray and after the closing of said panel, respectively, said photo-electric cell means including means to project a light beam adapted to be interrupted by movement of the operators hand adjacent said cabinet.

Description

Dec. 7, 1954 JOUK 2,696,417
FIXTURE FOR STERILE INSTRUMENTS Filed April 5, 1951 3 Sheets-Sheet l INVENTOR LEON JOUK ATTORNEY Dec. 7, 1954 JOUK 2,696,417
FIXTURE FOR STERILE INSTRUMENTS Filed April 5, 1951 5 Sheets-Sheet 2 q s I I a I ;i o m N N FIG?) INVENTOR LEON JOUK ATTORNEY Dec. 7, 1954 JOUK 2,696,417
I FIXTURE FOR STERILE INSTRUMENTS Filed April 5, 1951 3 Sheets-Sheet 3 3? I37 v I |3| 270 270 I39 14: 6 INVENTOR LEON JOUK 27 29 34 I35 I36 140 I42 ATTORNEY United States Patent FIXTURE FOR STERILE INSTRUMENTS Leon Jouk, Le Pre Saint-Gervais, France, assignor to Charles N. Breyner, New York, N. Y.
Application April 5, 1951, Serial No. 219,432
7 Claims. (Cl. 312223) This invention relates to cabinets provided with one or more mobile elements, the movement of which is controlled by a photoelectric cell.
'More particularly, the'invention relates to fixture for sterile instruments such as used for medical purposes in dentistry, otorhinology, laryngology, general surgery, appliance for storing dressings and also to cabinets for food products such as used in pastry shops, butcher shops, delicatessen stores.
Such cabinets are provided either with a door or a tray or other mobile element and with photoelectric cell means to control the movement of such mobile element.
The invention described herein covers the fixtures used to enclose the sterile instruments utilized by dentists or surgeons and also refers to the other applications indicated-in the above paragraph 2 (for all food industries). The main purpose of this invention is the automatic opening of the cabinet when the practitioner 1 approaches with his hand to take an instrument, and this happens without it being necessary for him to touch any non-sterile part of the cabinet such as e. g. a handle.
The fixture, according to the invention, includes at least one part which is mobile in relation to the main structure of the fixture and which allows, by being displaced, the access to the sterile instruments contained in the said fixture. This motion is controlled by an electric motor. The fixture also'includes means of emitting a pencil of lightor infra-red rays (which will be referred to hereunder as the light beam) which is made to pass in front of the mobile part and then onto a photo-electric cell. The latter is connected with the motor in order to permit displacement of the said part in the direction which allows access to the instruments when the light beam is interrupted and in the opposite direction when the said light beam is reestablished.
Under these conditions, when the practitioner extends his hand to seize an instrument, he interrupts inevitably the light beam and as a result the mobile element moves giving access to the instruments. As soon as he withdraws his hand, after having taken the desired instru' ment, the light beam is reestablished and the mobile element reassumes its originalposition.
The mobile element may consist of a drawer or tray having the function of carrying the instruments, and is mounted riding on the main, but also mobile, element. Or it may consist of a door or panel capable of shutting 01f the space in which are placed the instruments.
In a favorable manner of execution, the fixture would include several riding trays holding the instruments, as well as a retractable panel, preferably of transparent material, placed in front of the trays, this panel being connected to the electric motor in such a manner as to move when the light beam is interrupted and before the trays ride out of the fixture.
Further characteristics of the invention will appear in the complementary description made hereafter with reference to the annexed drawings, given as non-limiting examples, and in which:
Fig. 1 represents, in perspective, a form of execution of this fixture according to the invention;
1 Whenever the word practitioner appears in this patent, it refers not only to medical practitioners but also to anyone uls)ing the cabinet in any field as mentioned in paragraph 2 a ove.
2 Likewise instruments can be substituted by objects dealt with in paragraph 2 also.
Fig. 2 is a view of an alternate method of execution, also shown in perspective;
Fig. 3 is a vertical section of the fixture in Fig. 2, however, showing it in a closed position;
Fig. 4 is a view similar to that given in Fig. 3, the fixture in this case being open;
Fig. 5 is a perspective drawing representing a practical method of carrying out the gearing device which controls the movement of the trays and of the retractable panel;
Figs. nection between the photo-electric cell and the motor; and P Fig. 8 is a schematic drawing of an alternate variant fixture, according to the invention.
As represented in Fig. 1, the fixture 1 consists of a recess 2 and is equipped with trays 3 which can ride horizontally and thereby place themselves in this recess. Means, not represented in the drawings, are foreseen to provide permanent sterilization, hot or cold, of the instruments placed on the trays 3.
A plate 4 of transparent material such as Plexiglass is mounted vertically on the fixture so as to shut ofi, when it isin a high position, the space wherein are located the trays when these are put back inside the cabinet. The objects and instruments carried by the trays are thus kept isolated from the surrounding atmosphere and consequently are sterile. A projector 5 is provided to send a light beam onto a photo-electric cell 6 after having been reflected on a series of mirrors such as 7. This produces a barrage of light which is necessarily interrupted when one approaches the hand to seize one of the instruments carried by the tray. The recess must be sufficiently deep so that when the trays emerge they do not cut the light beam; if this were to happen, the trays would never reassume their original position. The photo-electric cell 6 e. g. is disposed in such a manner, described hereafter, that when the light beam is cut, this brings about the lowering of the transparent plate. 4 and the exit of the trays 3- in the recess, and their return to their original position when the light beam is reinstituted.
In the alternate variant sample represented in Fig. 2, the fixture does not possess a recess and the optical apparatus is placed a certain distance in front of the fixture so that the trays in their exterior position do not cut the light beam.
In this method of execution, the light beam emitted by the projector 5 is transmitted to the cell 6 by the means of two mirrors 7a and 7b.
As can be seen in Figs. 3 and 4, the trays 3 are fixed on guiding rails 8 which can ride on horizontal shafts 9 secured at their rear extremity to the body of the fixture. These trays have on each lateral side fingers (or catch pins) 10 which are lodged in grooves 11 found in the connecting rods 12, or in the case of the bottom tray the fingers are attached to the connecting rods. The connecting rods 12 are jointed at their upper extremity, which is free, to small connecting rods 13, these themselves pivoting underneath the upper wall of the cabinet. An electric motor 14 is connected by a belt 15 to a driving pulley 16 the axle of which is connected at each end to a drum 18. On each of these two drums is attached one of the ends of a cable 19 the other end of which is attached to the lower end of plate 4. The diameter of these drums is such that half a rotation corresponds to the necessary displacement of the plate. The drums possess knobs or crank pins 20 which can, when the drums are rotating, engage the fork or prongs fixed to the bottom tray. When the drums assume the position represented in Fig. 3, they make possible the descent of plate 4 by a rotation of and causes the exit of the trays 3, as is seen in Fig. 4. A switch or commutator which is thrown open when plate 4 is lifted to its closed position, is provided to stop the motor when the plate and trays have reassumed their original position.
In order to avoid that cables 19 slacken, one can arrange the displacement of trays 3 and panel 4 in the manner ascribed in Fig. 5. A crank 24, with a finger 20 at its end, is secured to a shaft 17 fixed to pulleys 16 on each lateral side of the trays. The drums 18 are 6 and 7 are electrical diagrams showing the con- 3 I mounted loosely on the shaft 17 and can be drawn by this shaft by means of lugs 26Zz'on the drums and lugs*26b" on the cranks, said lugs each extending over a sector of 90 and said lugs supported by bearings 33.
At-the-be'ginningof the rotation of the shaft '173 in the direction of the arrow 25, the--*lugs 2a-make cont-act with the lugs 26b "and as a result'of'the tension'exertedthe panel 4 opens itselfy Whenthe shaft 17"ha's rotated: 180", the panel is completely lowered, and the drums stop. The shaft 17 continuing to move, thefingers 20' i'nl0 terweave with the fork 21"and seoure the exit of-the trays'3. -Fork 21in-this'case'hasits'slotopeningiup wardly 'bu't said fork is fixed to the lowest "tray as in Figs;
3 and 4.
The shaft-17 turning in the opposite direction; as soon as the" -1ight beamhasbeienmeestablishedg the trays 3 return into the cabinet; then, the lugs 26b coming intoi play with the1ugs26a, thei'drums '18 are drawn alohgand the panel 4 returns upwards. 1
his clear from-the above that the cables-19 "do not slacken. In'additiom: the cranks and the forks are placed. 2 at the level of the trays'and the whole can beenclosed-lin an enclosure 32* which is fairly insulating' 'since. 616 01113 1 communication withthe outside:consists'of the openings for the shaft 17. 2'
Theiielectric-motor 14 should preferablyibe a series motor, the same being-of thetyp'eiiin whichla change zin: direction of rotation can .benobtainedwbyt reversing direction of current running through. thewindioatorsi or: field in relation tothe :currentinthearmature of.:'the'..30 motor.
Referring nowto-Fi'gs. 6 and-7 there is shown a wiring diagram illustrating:.theaelectrical: control forzmotor14- under the influence of photo-electric tube: Theztermi: 1 na'ls:30 are connected toi' a source'of electricalfienergy I35 (notshown). Armature-28 of 'motor 14 is connected by" lead 146 lto one. of .the. terminals $30 and also'to switch 23tby lead.46a;-- Leada46connects switch 23-:toterminal... 421.3 The other .tertninaiuiitl' is connected to terminal 114st. byrlead'47i Terminal 44is connectedto terminalw43a40 by. lead. 43a and1terminal 45' is connected-:- by lead :48 'I to switch: 22 (which; inlz'turni is wconnected'vito lead 146m by leadt'49.
A relay-indicatedgenerally by the referen'cernumeral 29.."comprisesia pair of switch arms; 49; 41-'pivoted"aboutw4,5 terminals 27a and adapted to contact either terminals: 42-; 43 'or terminals 44,45 r A reciprocally movable solenoid: core r129 is connected toarms 4tlg=41 andxis activatedz in one;direction-by.a solenoid coil 13d) and in the opposite direct-ion by a springl3lfixed atone end to any'convenient stationary position of the device, saidportion "being 1 indicated schematically at 132; 1
Terminals .2721 are connectedntowthe field-coil:27:of' motor 14. Solenoid coil 130 is connected at :onezend to t lead .47-=by lead 1335: The other :end of .coil 13% :is connected' 'by'lead 134 to terminal 1350f a conventional amplifier 136;tho' otherterrninal .137 of the latter being connectedeto lead 146 by lead 138;" The-input terminals 139,;1140' are connected: to the photo-electric tube-6 by leads 141,142,"
When a hand is interposed 'to interrupt the beam of" lightsistriking photo-electric tube 6, relay. coil 130 is deenergized to move switch arms 46*, 41-from the position shown in Fig. -6 to that shown in Fig. 7. Switch 23 is openxwhen plate 4 is in itsuppermost position closing 6 thecabinets Movement of plate 4 downwardly. will cause I switch 23 to open.- Switch 22 is closedby the lowermost tray whenzthe cabinet is closed, as shownin the position of Fig. 3, but is opened whenxthe. trays move to the open position of Fig. 4. I Switches 22,23 are preferably acti-' vated-bycontactwith the lowermost tray and plate 4 in a conventional manner obvious to those skilled in the art.
Fig; 6 illustrates'theposition of Fig. 3 when the cabi-w net :is closed. In suchposition switch 23is open and: switch 22'i's closed; The circuit through the'armature 28is open because switch 23 is open and the motor thereforeis stopped.- However, when a hand is interposed .in the1path. of I the. .light'ray from the :photo electric cell, the circuittozthe. photo electricncell is open andthe. relay 29 is deenergized,.lmoving switch arms 4% 41 from the 80 position of Fig; 6 to the position of Fig. 7. The current then flows through armature 28' through wires 46a, 48a,- switch 22, wire 43, terminal 45; switch arm '41, inductor 27," switch arm '40, wires 43a'and 47. The'motor pro ceeds to move theplate 4 downwardly and'to 'there'aftensgi move the trays forwardly through the opening in the cabinet?" Assoon'a's'the"plate"4 moves'awayfronrswitch" 23, it closes and when the trays 3 are fully projected, the switch 22 opens itself as shown in Fig. 7, thereby stopping the motor. This position is illustrated in Fig. 7 which now shows switch 22 open.
When the hand is thereafter. taken away from its position, interrupting the lightthrough the photo electric cell 6, the circuit=tothet'relayf29lis again completed and the switch arms 40, 41 move back to the position of Fig. 6. At this'time switch :23 is closedso that current passes through thetinductor'27 in a reversedirection-thereby reversing the direction of the motor and causing trays 3 to move ba'ckinto the cabinet andthe'plateytothereafter move up to its closing position of Fig. .-.4. Such operation again opens switch 23'"and closes switch 22, but the opening of switch 23 when the switch arms 40, 41 are engaging terminals 42, 43 prevents any current from passing through. .Yinductors 275 and. rotation :of r'thermotor stops:
It is understood that one can; witho'ntxdivergirrg from :2 thez'basic. "frame r-of the :invention,r.-modify l theitdetaiis; of theimanners of .executiontof thezfixtureas :dfiSCIlbEdiEtbOl/C. 1; Thus,.e. gv plate 4, instead of .movingrup, and: down, could. bemounted.pivotingiaround a: horizontal axis, as is shown in :Fig. 38. =.Theicontrol-.of=.tl 1ertrays and thezplate'sor inn general of the mobile element, could be carriedtoubvbyvmeans of an eccentric axle, a cam,;levers orzentirely'tdifferentdevices." Oneicouldplan a hand: operated-cranky: to obscure the photo-electric cell-or the projectorzwhen; the'drawers are open; in orders-to maintain thisposition.
Having thus described: myinvention; I claims as new: and desire to secure by-Letters Patent? 1. In combination, a cabinet-formedwith an opening, a panel to close said opening, a tray movably mounted with in rsaid-cabinet and movable through; said opening, an electric reversible motor, meanscontrolledbyrthei'motor. to openthe'panel andzthereafter to move said traythrough i said opening upon rotating-the motort-in one -direction"- and to retract-said trayinto the cabinet through said-opening and thereafter-close said.- panel upon irotatinga said motor in :an opposite-tdirectionand. photo-electric cell-w means =.to control the. direction of Irotation-of said motor 2. and..including means to project. a beam -adapted to be 1" interrupted by movement of an .operatofls .hand-radja'cent said .cabinet.
2. .ln-combination; a cabinet-formed.withanopening, a panel slidable relative tothetcabinet to positions 'covering. and uncoveringsaid opening, a. pluralityof trays" slidably mounted within said-cabinet one-abovetheuother and movable through,saidopening-When.it is uncovered, anelectric motor-withint'thecabinet, means-controlled by i said motor to slidably move said panel from covering to 2:
"uncovering position and to thereafter-move said trays through said. opening so. asntoprojectfrom -said cabinet upon rotating-saidamotor in one direction tofirst retract Saidtrays into said.cabinet-and-thereafter-move said-panel .back to covering position upon. rotating said motor .in anopposite.direction,- photo-electric'cellcrneans' to control the directionofsaid:motor'includingmeans to" t projectthe light" beam. exteriorly of. the cabinet and. means to receive said light. beam whereby the handof the operator moving across the: beam willinterrupt thel-beami.
3. In combination, a cabinet-formedfwithsa frontop'en- 5 ing, a panel :slidable up and down at'thei' fIOH'C'OfTthC cabinet to close-randzopen-"said opening,wa pluralityof trays slidably mounted within said cabinet, a slottedlink interconnecting said trays,'"a diskrotatablymounted 'with in the cabinet electric motor control means to rotate said disk, a pin on said disk, a fork on one of-said trays engageable with said pin and a cable interconnecting said disk with said panel.
4. 'In combination, a cabinet formed with an opening, a panel to close said opening, a tray within said cabinet and movable through said openinganelectrio'motor within said cabinet, means controlled by said electric motor to first open the' panel and then project thetray through said opening uponrotating said motorin one direction, and for retracting said tray into the cabinet and then closing said-panel upon rotating said motor in an opposite direction and photoelectric cell means to control the operation of said motor.
5. Theicombinatio'n ofclaim 4, in'cornbination with means to automatically stop the'op'eration'of said motor after projection of said tray and after the closing of said panel, respectively.
6. The combination of claim 4, said photo-electric cell means, including means to project a light beam adapted to be interrupted by movement of the operators hand adjacent the cabinet.
7. In combination, a cabinet formed with an opening, a panel to close said opening, a tray within said cabinet and movable through said opening, an electric motor Within said cabinet, means controlled by said electric motor to first open the panel and then project the tray through said opening upon rotating said motor in one direction, and for retracting said tray into the cabinet and then closing said panel upon rotating said motor in an opposite direction, and photo-electric cell means to control the operation of said motor, means to automatically stop the operation of said motor after projection of said tray and after the closing of said panel, respectively, said photo-electric cell means including means to project a light beam adapted to be interrupted by movement of the operators hand adjacent said cabinet.
References Cited in the file of this patent UNITED STATES PATENTS
US219432A 1951-04-05 1951-04-05 Fixture for sterile instruments Expired - Lifetime US2696417A (en)

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US3028209A (en) * 1957-07-25 1962-04-03 Whirlpool Co Movable kitchen units and control means therefor
US3077967A (en) * 1959-09-24 1963-02-19 Sperry Rand Corp Safety switch for mechanized files
US3224825A (en) * 1963-10-28 1965-12-21 Diebold Inc Power file counter construction
US3259443A (en) * 1964-04-09 1966-07-05 Lavigne Marcel Display cabinet
US3389948A (en) * 1965-09-27 1968-06-25 Seeburg Corp Automatic delivery mechanism
US3640596A (en) * 1969-12-10 1972-02-08 Sperry Rand Corp Safety apparatus for mechanical filing cabinets
US3887252A (en) * 1972-12-06 1975-06-03 Roneo Vickers Ltd Light operated guard
US5730316A (en) * 1995-06-15 1998-03-24 Crane Company Multiple-product merchandising machine
EP2218360A1 (en) * 2009-02-13 2010-08-18 Astron Engineering Limited A display cabinet
SE2130094A1 (en) * 2020-06-17 2022-03-28 Rgt S R O Hygienic covering of food counters

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US1112917A (en) * 1911-07-05 1914-10-06 Monroe Kohn Display apparatus.
US2187012A (en) * 1937-01-19 1940-01-16 Brenner Edward Light-controlled actuating device
US2231790A (en) * 1939-07-11 1941-02-11 Holt H Andress Apparatus for use in sterilizing
US2419459A (en) * 1944-02-01 1947-04-22 Gen Electric Photoelectric detecting apparatus

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2994572A (en) * 1957-05-29 1961-08-01 Union Stock Yard & Transit Co Chicago Refrigerated display counter with automatic door opening
US3028209A (en) * 1957-07-25 1962-04-03 Whirlpool Co Movable kitchen units and control means therefor
US3077967A (en) * 1959-09-24 1963-02-19 Sperry Rand Corp Safety switch for mechanized files
US3224825A (en) * 1963-10-28 1965-12-21 Diebold Inc Power file counter construction
US3259443A (en) * 1964-04-09 1966-07-05 Lavigne Marcel Display cabinet
US3389948A (en) * 1965-09-27 1968-06-25 Seeburg Corp Automatic delivery mechanism
US3640596A (en) * 1969-12-10 1972-02-08 Sperry Rand Corp Safety apparatus for mechanical filing cabinets
US3887252A (en) * 1972-12-06 1975-06-03 Roneo Vickers Ltd Light operated guard
US5730316A (en) * 1995-06-15 1998-03-24 Crane Company Multiple-product merchandising machine
EP2218360A1 (en) * 2009-02-13 2010-08-18 Astron Engineering Limited A display cabinet
SE2130094A1 (en) * 2020-06-17 2022-03-28 Rgt S R O Hygienic covering of food counters
SE545537C2 (en) * 2020-06-17 2023-10-17 Rgt S R O Hygienic covering of food counters

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