US3077967A - Safety switch for mechanized files - Google Patents

Safety switch for mechanized files Download PDF

Info

Publication number
US3077967A
US3077967A US842086A US84208659A US3077967A US 3077967 A US3077967 A US 3077967A US 842086 A US842086 A US 842086A US 84208659 A US84208659 A US 84208659A US 3077967 A US3077967 A US 3077967A
Authority
US
United States
Prior art keywords
wire
circuit
contacts
trays
motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US842086A
Other languages
English (en)
Inventor
Benjamin W Woodward
Walter G Anders
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unisys Corp
Original Assignee
Sperry Rand Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sperry Rand Corp filed Critical Sperry Rand Corp
Priority to US842086A priority Critical patent/US3077967A/en
Priority to CH1072660A priority patent/CH403712A/it
Priority to GB32834/60A priority patent/GB938687A/en
Priority to FR839348A priority patent/FR1268207A/fr
Priority to BE595339A priority patent/BE595339A/fr
Application granted granted Critical
Publication of US3077967A publication Critical patent/US3077967A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42F—SHEETS TEMPORARILY ATTACHED TOGETHER; FILING APPLIANCES; FILE CARDS; INDEXING
    • B42F17/00—Card-filing arrangements, e.g. card indexes or catalogues or filing cabinets
    • B42F17/28—Card-filing arrangements, e.g. card indexes or catalogues or filing cabinets in the form of endless bands or revolving drums
    • 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
    • A47B63/00—Cabinets, racks or shelf units, specially adapted for storing books, documents, forms, or the like
    • A47B63/06—Cabinets, racks or shelf units, specially adapted for storing books, documents, forms, or the like with parts, e.g. trays, card containers, movable on pivots or on chains or belts
    • A47B63/067—Cabinets, racks or shelf units, specially adapted for storing books, documents, forms, or the like with parts, e.g. trays, card containers, movable on pivots or on chains or belts with a noria lift

Definitions

  • This invention relates to mechanized files and more particularly to an endless conveyor file having a plurality of card trays mounted to travel in an endless vertical path within the file casing. In devices of this type the trays are moved to a reference position wherein the tray desired is disposed in front of the operator at an open upper portion of the file casing.
  • the main object. of the invention is to. provide a simple, efiicient and economical construction of switch which is located adjacent the reference position sothat the machine is stopped whenever the hand of the operator comes in contact with the switch bar especially when the trays are in motion. This is obviously to prevent injury to the hand of the operator if it is extended too far into the casing, especially when the trays are in motion.
  • a further object is to provide a simple circuit arrangement which will efifect the stoppage of the motor and will prevent itstarting again until the circuit is deliberately reestablished.
  • this invention involves a'grounded cable disposedunder tension closelyadj'acent one or more charged
  • the cable is centered within slightly oversize holes in electrically charged .plates- .-Any contact-made between the cable and the plates will result in quickly stopping the machine through the intermediary of associated contacts and circuit relays and connections.
  • the cable is held in a taut line by a constant spring pressure by specific means later described.
  • FIG. 1 is a partial perspective view of the top of a file casing with the upper front cover removed to show the trays therein in the reference position and with the safety switch in position with respect thereto;
  • FIG. 2 is a perspective exploded view of the details of the'switch and its mounting
  • FIG. 3 is aview showing the local circuit involving the safety switch.
  • FIG. 4 is a view showing the circuit for the entire mechanized file including the safety switch.
  • FIG. 1 is shown the file casing 30 with the upper front cover removed to expose the trays 32 in the socalled reference position 31 where the trays and their contents are available to the operator either for examination or removal of the trays.
  • these trays are mounted on conveyor means which moves them either up or down in an endless path and that, upon actuation Patented Feb. 19, 19133 of proper buttons or similar devices, designated trays may be thus presented.
  • the side portions 33 and 34 of the casing form chambers within which are housed the specific means for supporting the safety switch.
  • the safety switch includes an elongated substantially rigid tubular element 35 of insulating material constituting a manual pressure bar extending between the side portions 33 and 34 of the casing and across in front of the reference position as shown.
  • This element 35 embraces an elongated bare wire 36 of conductive material which extends between bracket members 37 and 38 disposed within the side portions 33 and 34 of the casing.
  • the bracket members 37 and 38 are suitably grounded on the casing of the machine.
  • the wire 36 passes through an opening 39 in the bracket 38 and is fixed to the bracket 38 in any suitable manner not shown.
  • the wire is connected to a slideable metallic stem 40 movable within a sleeve 41 in the bracket 3-7.
  • the stem has a headed portion 43 between which and the sleeve 41 is disposed a coiled spring 42 which tends to stretch the wire 36 and hold it under desired tension to maintain it taut.
  • FIG. 2 there is an insulated block 44 bolted to the corner of the side portion 34 and there is a similar block similarly fixed to the corner of the side portion 33 but not shown in FIG. 2.
  • To these blocks 44 are respectively fastened conductive plates 45 and 46. These plates 45 and 46 are connected in circuit in a manner to be explained later.
  • Each plate is provided .with an aperture 47 through which the wire 36 passes but not normally in contact therewith.
  • a slit 48 extends from the aperture 47 in each plate to the adjacent edge thereof. The portion of the plate beneath the slit may be bent aside suflicient to permit the wire 36 to he slipped into the aperture 47 and then moved back to close the opening thus formed.
  • the actuating circuit of the safety switch consists of a relay BR having a low voltage mag netic coil, a pair of normally closed contacts BR-l operated by relay BR and connected in series with the magnet coils of the motor-control relays U and D; a set of transfer contacts having normally closed contacts BR-Z in series with a green pilot light, shown in the complete electrical diagram of FIG. 4, and normally open contacts BR-3 connected from one terminal of a low voltage transformer for example, 6 volts through a reset switch RS to terminal 9 of the BR magnet coil.
  • the holding circuit consists of a pair of normally closed contacts RS forming part of a series circuit from terminal 6 of the transformer through RS, normally open contacts BR-3 (when closed) and relay BR magnet coil to terminal 7 of the transformer.
  • the indicator or pilot light circuit consists of a circuit from terminal 6 of the transformer through switch RS,
  • FIG. 4 shows a typical complete circuit for a machine of this kind, and includes the safety switch described with respect to FIG. 3.
  • the safety switch is indicated by the letters FSS. Since we are not concerned with all the details of the complete circuit, it will only be described in general and only particularly in respect to how the safety switch affects it.
  • the upper front panel is opened as-shown in FIG. 1 thus exposing the card trays which are in the reference position as well as the safety switch as shown. If it is desired to move the trays in the lip-direction a start button and'the up button are pressed which will energize the motor and close the contacts U-Z o f'the relay U.
  • relay BR This will establish a circuit through relay BR up to the safety switch FSS.
  • auxiliary interlock switches FPS, BPS, CS, F85, and HCS are open.
  • contacts U-2 and D-2 on the corresponding relays are open, as are contacts B-1 and Zen relay BR since there is no closed electrical path from one side of the transformer secondary through magnet coil BR to the other side of the transformer.
  • relay contacts BR-2 are closed and thus the green light is lit by connection from terminal 7 of the transformer through the lamp, contacts BR-2, reset contacts RS to terminal 6 of the transformer.
  • relay contacts D-2 or U-Z are closed. If, during this operation period, contacts FSS of the safety switch are closed by the operators hand a closed electrical circiut will exist from terminal 6 of the transformer, through safety switch contacts FSS, closed contacts U-2 or D-2 and BR magnet coil to terminal 7 of the transformer.
  • the magnet BR coil being energized will cause normally closed contact BR-l to open, thus removing electrical power from the magnet coil of relay U or D. This will deenergize the motor and apply dynamic braking to instantly stop the apparatus. Actuation of the magnet coil BR also causes norr'n'ally closed contacts BR-2 to open, thus causing the green light to be extinguished.
  • normally open contacts BR-3 are caused to close, completing an electrical circuit from ter' minal 6 of the transformer through reset switch RS, contacts BR-3 and relaymagnet coil BR to terminal 7 of the transformer.
  • relay BR is held in actuated condition through its own contacts until such time that the reset switch RS is manually opened. The electrical holding circuit is then disrupted and the relay BR reverts to normal deenergized condition.
  • a safety device for a mechanized file wherein a pinrality of trays are moved by a motor and motor controlled circuit meansiwithin a casing provided with an opening permitting access to the trays, comprising a grounded wire extending across the opening, yieldably adjustable means for holding the wire taut, and an electrically charged plate in said circuit means disposed closely adjacent said Wire for deenergizing the motor control circuit to stop the motor when said wire is moved against the resistance of said holding means and into contact with said plate.
  • a safety device for a mechanized file wherein a plurality of trays are moved by a motor and motor controlled circuit means within a casing provided with an opening permitting access to the trays, comprising a grounded wire associated with said circuit means and extending completely across said opening, adjustable means for yieldably holding said wire taut, a substantially rigid manual pressure bar extending the length of the wire in said opening and constituting an insulating sleeve for said wire, and a plurality of electrically charged plates associated-with the circuit means-and' disposed closely adjacent said wire and arranged in-spaced'relation therealong for deenergizing the mot-or'control circuit to stop the motor when said wireris moved against the resistance of said holding means and into contact with n plate.
  • the safety deviceiof claim 3 in which the charged plates each have an opening through which the wire passes but normally out of'contact wtih the edges thereof.
  • the casing in which the casingincludes side portions at opposite ends of the opening, the wire.v extending into said side portions, the adjustable yielding means for holding t-hewire taut being disposed in one of said side portions, each of saidplates having an opening larger than the diameter of the wire and through which the wire passes and said openings being slotted to provide means for initially positioning thewirc in said openings.
  • Safety switch means for a mechanizedfile having a casing having an opening in which trays of cards are moved by a circuit controlled motor, a conductive wire extending across said opening, a substantially rigid manual pressure bar extending the length of the wire in said opening and constituting an insulating sleeve for said wire, oppositely spaced charged plates each'having an opening through which the wire passes without contacting the same, yieldably adjustable means for holding the wire taut for free passage through said plateopenings, relays withcontacts to close the.
  • control relay in circuit with said contacts when they are closed, said control relaybeing energized when the conductive wire contacts acharged'plate, and a contact operated by the control relay and in circuit with the first mentioned relays to open the circuit of said relays and open the motor control circuit.
  • the safety switch means of claim 6 including a pilot 2 light normally in circuit with another normally closed contact of the control relay and still another normally open contact controlled by the control relay to establish a holding circuit for said control relay when the last mentioned contact is closed, and a reset switch normally closed and in said holding circuit, said reset switch when opened breaking the holding circuit and permitting the relays-and contacts to restore to normal condition.

Landscapes

  • Sorting Of Articles (AREA)
  • Pile Receivers (AREA)
  • Switch Cases, Indication, And Locking (AREA)
US842086A 1959-09-24 1959-09-24 Safety switch for mechanized files Expired - Lifetime US3077967A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US842086A US3077967A (en) 1959-09-24 1959-09-24 Safety switch for mechanized files
CH1072660A CH403712A (it) 1959-09-24 1960-09-22 Dispositivo di sicurezza per schedario
GB32834/60A GB938687A (en) 1959-09-24 1960-09-23 Safety switch for mechanized filing systems for documents and like articles
FR839348A FR1268207A (fr) 1959-09-24 1960-09-23 Interrupteur de sécurité pour les classeurs mécaniques
BE595339A BE595339A (fr) 1959-09-24 1960-09-23 Commutateur de sécurité pour classeurs mécanisés.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US842086A US3077967A (en) 1959-09-24 1959-09-24 Safety switch for mechanized files

Publications (1)

Publication Number Publication Date
US3077967A true US3077967A (en) 1963-02-19

Family

ID=25286491

Family Applications (1)

Application Number Title Priority Date Filing Date
US842086A Expired - Lifetime US3077967A (en) 1959-09-24 1959-09-24 Safety switch for mechanized files

Country Status (4)

Country Link
US (1) US3077967A (it)
BE (1) BE595339A (it)
CH (1) CH403712A (it)
GB (1) GB938687A (it)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3181921A (en) * 1964-02-03 1965-05-04 Gen Electric Safety and control mechanism for power-operated structure
US3256395A (en) * 1960-07-13 1966-06-14 Maschf Augsburg Nuernberg Ag Operator safety device for rotating machinery parts
US3285682A (en) * 1964-07-08 1966-11-15 Kranel Mfg Co Kitchen cabinet structure
US3698527A (en) * 1971-01-15 1972-10-17 Nicholas W Wiggers Press guard and parts monitor
US3887252A (en) * 1972-12-06 1975-06-03 Roneo Vickers Ltd Light operated guard
EP2206449A1 (de) * 2009-01-09 2010-07-14 Rudolf Meyer Spannvorrichtung zum Vorspannen eines Möbelbauteils
CN113779137A (zh) * 2020-06-29 2021-12-10 北京沃东天骏信息技术有限公司 一种数据归档的方法和装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2208721A (en) * 1939-10-17 1940-07-23 Demosthenes Nicholas Burglar alarm
US2295441A (en) * 1940-05-16 1942-09-08 Wingfoot Corp Safety device
US2554124A (en) * 1946-03-05 1951-05-22 Zita Wallace Salmont Means for automatic control of machinery or other devices
US2607866A (en) * 1950-05-11 1952-08-19 Arthur W Fruh Trap switch
US2696417A (en) * 1951-04-05 1954-12-07 Charles N Breyner Fixture for sterile instruments
US2758901A (en) * 1953-04-17 1956-08-14 Craig Machine Inc Automatic filing cabinet

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2208721A (en) * 1939-10-17 1940-07-23 Demosthenes Nicholas Burglar alarm
US2295441A (en) * 1940-05-16 1942-09-08 Wingfoot Corp Safety device
US2554124A (en) * 1946-03-05 1951-05-22 Zita Wallace Salmont Means for automatic control of machinery or other devices
US2607866A (en) * 1950-05-11 1952-08-19 Arthur W Fruh Trap switch
US2696417A (en) * 1951-04-05 1954-12-07 Charles N Breyner Fixture for sterile instruments
US2758901A (en) * 1953-04-17 1956-08-14 Craig Machine Inc Automatic filing cabinet

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3256395A (en) * 1960-07-13 1966-06-14 Maschf Augsburg Nuernberg Ag Operator safety device for rotating machinery parts
US3181921A (en) * 1964-02-03 1965-05-04 Gen Electric Safety and control mechanism for power-operated structure
US3285682A (en) * 1964-07-08 1966-11-15 Kranel Mfg Co Kitchen cabinet structure
US3698527A (en) * 1971-01-15 1972-10-17 Nicholas W Wiggers Press guard and parts monitor
US3887252A (en) * 1972-12-06 1975-06-03 Roneo Vickers Ltd Light operated guard
EP2206449A1 (de) * 2009-01-09 2010-07-14 Rudolf Meyer Spannvorrichtung zum Vorspannen eines Möbelbauteils
CN113779137A (zh) * 2020-06-29 2021-12-10 北京沃东天骏信息技术有限公司 一种数据归档的方法和装置

Also Published As

Publication number Publication date
BE595339A (fr) 1961-01-16
CH403712A (it) 1965-12-15
GB938687A (en) 1963-10-02

Similar Documents

Publication Publication Date Title
US2916633A (en) Photoelectric article detector
US3077967A (en) Safety switch for mechanized files
JPS5519795A (en) Electric circuit element breakage detector
CH486138A (de) Trennvorrichtung für vollisolierte elektrische Hochspannungsschaltanlagen
CH418435A (de) Schaltgerät, insbes. Luftschütz für hohe Einschaltstromspitzen
US2249488A (en) Timing device
US1919802A (en) Apparatus for testing insulation
US2454882A (en) Means for obtaining load and voltage recordings of electrical distribution systems on a single recorder
US2541915A (en) Automatic poise operating means for weighing scales
US3040211A (en) Apparatus for indicating an electrically grounded condition
BR7704580A (pt) Dispositivo de separacao de fio para maquinas testeis
US2087860A (en) Automatic counter
US1844790A (en) Voltage regulator
US2586125A (en) Apparatus for testing the continuity of fuses
US2297819A (en) Circuit selecting switch
US2394294A (en) Time delay relay circuit
US2898548A (en) Testing apparatus
US2035875A (en) Vibrator and circuit
US1820203A (en) Automatic cut-off switch
ES445003A1 (es) Aparato detector de anomalidades en vehiculos, maquinas y construcciones fijas.
US2812136A (en) Core winding apparatus
US1849376A (en) Electric transformer
US2126981A (en) Control apparatus
GB881415A (en) Apparatus for testing an insulated electrical conductor
US2112638A (en) Testing device