US3691328A - Permutation switch - Google Patents

Permutation switch Download PDF

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Publication number
US3691328A
US3691328A US116172A US3691328DA US3691328A US 3691328 A US3691328 A US 3691328A US 116172 A US116172 A US 116172A US 3691328D A US3691328D A US 3691328DA US 3691328 A US3691328 A US 3691328A
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US
United States
Prior art keywords
tumbler
tumblers
spring
circuit board
fingers
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
US116172A
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English (en)
Inventor
William J Davidson
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.)
Teccor Electronics Inc
Original Assignee
ECC Corp (FORMERLY ELECTRONIC CONTROL CORPORATION)
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
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Application filed by ECC Corp (FORMERLY ELECTRONIC CONTROL CORPORATION) filed Critical ECC Corp (FORMERLY ELECTRONIC CONTROL CORPORATION)
Application granted granted Critical
Publication of US3691328A publication Critical patent/US3691328A/en
Anticipated expiration legal-status Critical
Assigned to TECCOR ELECTRONICS, INC. reassignment TECCOR ELECTRONICS, INC. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). 4/15/76 TEXAS Assignors: ECC CORPORATION, A CORP. OF TEXAS
Assigned to ECC CORPORATION (FORMERLY: ELECTRONIC CONTROL CORPORATION) reassignment ECC CORPORATION (FORMERLY: ELECTRONIC CONTROL CORPORATION) CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). 12/31/69 - TX Assignors: ELECTRONIC CONTROL CORPORATION
Assigned to BANKERS TRUST COMPANY reassignment BANKERS TRUST COMPANY SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RANCO INCORPORATED A CORP. OF DELAWARE
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H27/00—Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings
    • H01H27/10—Switch operated by setting members according to a single predetermined combination out of several possible settings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00—Locks
    • Y10T70/70—Operating mechanism
    • Y10T70/7153—Combination
    • Y10T70/7322—Permutation

Definitions

  • a pin is insertable from the rear of the switch through openings in the outer tumbler portions to both move the lock member into release positions and lock such outer portions together. This permits use of the dial to change the azimuthal position of the peripheral segments relative to the dial indicia to change the combination of the switch.
  • the spring fingers are portions of a circuit board which also includes conductors leading from the fingers to terminals.
  • the circuit board is made flat and is then folded and installed into openings for same formed in a dielectric support member.
  • a principal object of the present invention is to provide multi-position connections between the conductive or dielectric region carrying portions of the tumblers and the dial controlled tumbler rotating elements, for the purpose of providing an almost infinite number of combination settings.
  • each tumbler comprises an inner portion which is freely rotatable. about the support shaft, and an annular outer portion which concentrically surrounds the inner portion.
  • the outer portion carries the make or break regions of the tumblers.
  • a releasable lock means normally connects the two tumbler portions together for conjoint rotation. When the lock means are released the inner tumbler portions are rotatable relative to the outer tumbler portions.
  • the lock means are arranged so that they can all be simultaneously moved into their release positions by an elongated pin inserted from the rear of the switch through aligned openings in the outer portions of the tumbler.
  • the pin serves to both release the lock means and to secure together the outer portions of the tumblers.
  • the dial is turned in accordance with the existing combination of the switch to place the conductive or dielectric regions of the tumblers in a circuit making or breaking position relative to the contact brushes or fingers.
  • the pin element is then inserted through the tumbler outer portions for the purpose of releasing the lock means and also holding the outer tumbler portions togetherand the conductive or dielectric segments thereof aligned.
  • the dial is manipulated for the purpose of changing the relative azimuthal positions of the inner tumbler portions, and the tumbler rotation causing elements thereon, relative to the outer tumbler portions and the conductive or dielectric regions thereon.
  • This manipulation also serves to change the relative azimuthal positions of the conductive or dielectric regions relative to the indicia on the dial.
  • the pin is then removed, permitting automatic return of the lock means to their lock positions. This readies the switch for further operation by use of the new combination.
  • each switch is provided with a longitudinally split inner casing of a dielectric material.
  • Each casing part is adapted to be radially joined with the other part to form a cylindrical casing.
  • Each part includes an axial recess formed in its outer surface for receiving a folded portion of a circuit board, and side windows in the recess for accommodating contact finger portions of the circuit board.
  • a generally radial slot is provided in a radial end wall of each part to port shelves for the opposite ends of the contact fingers are provided at the region of the windows and also laterally across the inner casing part.
  • the circuit board provides the contact fingers which ride on the peripheries of the tumblers and the conductors leading from such fingers to terminals at which wires are connected to the switch.
  • the circuit boards are initially formed in a flat condition
  • the conductive areas may be formed by printing, depositing, or by otherwise providing conductive strips or areas on a nonconductive base member or substrate. Then the circuit board is folded into a particular configuration for insertion into the recess, windows, slots and other regions formed for them in the casing inner parts.
  • the inner casing parts are moved radially into engagement with the tumbler set.
  • the spring contact fingers deflect and apply an inward force on the tumblers when the casing parts are in place.
  • FIG. 1 is an axial sectional view of an embodiment of the invention, with some internal parts shown in side elevation;
  • FIG. 2 is an exploded isometric view of the embodiment:
  • FIG. 3 is a cross-sectional view taken substantially along line 3-3 of FIG. 1;
  • FIG. 4 is a rear elevational view taken from the aspect denoted by line 4-4 in FIG. 1;
  • FIG. 5 is an exploded isometric view of one of the tumblers, looking towards the side of the tumbler on which the locking member is located;
  • FIG. 6 is an assembled isometric view of the tumbler taken from substantially the SAME aspect as FIG. 5;
  • FIG. 7 is an assembled isometric view of the tumbler taken from an aspect looking towards the opposite side of the tumbler;
  • FIG. 8 is a side elevational view of the tumbler, taken from an aspect looking towards the same side of the tumbler that is the front side in FIG. 7;
  • FIG. 9 is an axial sectional view taken through the tumbler substantially along line 99 of FIG. 8;
  • FIG. 10 is a side elevational view of the tumbler looking towards the side of the tumbler on which the locking member is situated;
  • FIG. 11 is an axial sectional view taken substantially along line 1ll1 of FIG. 10;
  • FIG. 12 is a top plan view of an electrical contact finger-lead wire circuit board
  • FIG. ,13 is an isometric view of the circuit board showing it shaped for use;
  • FIG. 14 is a fragmentary top plan view of a modified circuit board, usable in a normally open switch.
  • FIG. 15 is a fragmentary top plan view of still another modified form of circuit board, formed to include a third conductor.
  • the present invention relates to both normally open and normally closed switches.
  • normally open switch By way of typical and therefore nonlimitive example, the invention is illustrated and will now be described in connection with a normally open switch.
  • the switch 10 is shown to comprise a casing having a cylindrical side wall 12, an integral front wall 14 and a removable rear cover plate 16.
  • a tumbler-supporting and operating shaft 18 is journaled, such as by a journal 20, within anopening provided in the front wall 14.
  • Shaft 18 is shown to have a non-circular (e.g. square) cross-sectional portion 22 at its forward end which snugly fits within a socket of similar shape formed in a concealed control knob 24, and secured by a laterally extending set screw 26.
  • a conical entrance way 28 is formed in the forward portion of control knob 24.
  • the side walls of entrance way 28 slope radially inwardly towards a noncircular socket 30 for receiving a similarly shaped inner end portion 32 of a combination dial 34,
  • the switch 10 and the control knob 24 may be secured inside of a cabinet or behind a wall or barrier 35 (FIG. 2), with access to it consisting only of a relatively small opening in the wall portion of the cabinet, or in the barrier 35, which opening is coaxially aligned with the socket 30, for receiving the inner end portion 32 of the control dial 34.
  • each tumbler T is in the form of a two part circular disc or wheel.
  • the inner part 36 has an axial opening 38 therein sized for receiving a tubular bushing 40 which surrounds the shaft 18.
  • the annular outer tumbler portion 42 includes a central axial opening 44 for receiving an axial extension 46 of the inner tumbler portion 36.
  • Lock mechanisms hereinafter to be described in detail, nor.- mally connect the two tumbler portions together for conjoint rotation.
  • a radial actuator arm 44 (FIG. 1) is secured in a fixed position to the rear end portion of the shaft 18.
  • This arm 48 includes a noncircular opening at its mounted end in which is received a complementary shaped rear end portion of the shaft A a cotter pin 50 may extend through the rear end portion of shaft 18 for the purpose of holding the arm 48 and the tumblers T on the shaft surrounding sleeve 40.
  • Arm 48 also includes a forwardly directed axial pin or abutment 51 which rides in a circular channel 54 formed in the rear side of the inner tumbler portion 36.
  • An axially extending driving pin 52 extends forwardly from each tumbler inner portion 36.
  • a radially extending driving abutment 56 (FIG 10, for example) is provided on the rear side of each inner tumbler portion 36.
  • the driving pin 52 of each tumbler T travels a collision path with the abutment 56 of the tumbler immediately forwardly of it.
  • the driving web 56 of the rear tumbler T is positioned to be in the rotational path of the forwardly projecting pin 51 on arm 48.
  • each tumbler T is provided with adjoining V notches, some of which are designated 58,
  • Each outer tumbler portion 42 is made from plastic or some other dielectric material and a region of its periphery is recessed at 60 (FIG. 5, for example) to receive a segment 62 of a conductive material.
  • a longitudinally split inner casing or housing composed of complementary parts 64, 66 is received within the casing 12, 14.
  • These members 64, 66 are made from a dielectric material (eg plastic) and serve to retain and properly position a pair of folded circuit board members 68, 70.
  • FIGS. 12 and 13 depicting a circuit board 68.
  • the board 68 is shown in its flat condition. It is shown to include a base member 72 of plastic, plasticized paper, etc. which is dielectric in nature. Conductive lead lines or paths 74, 76 are printed, deposited, or otherwise emplaced on the member 62. Also, an insulative layer or laminate may be placed over the conductive paths 74, 76 to provide an insulative cover therefor. One end of each conductive path 74, 76 is connected to a flat, apertured terminal member 78, 80. The opposite ends of the conductive paths 74, 76 connect to initially flat, outside located conductor members or fingers 82, 84.
  • the flat circuit boards 68, 70 are suitably folded and creased into the configuration shown by FIG. 13, for example.
  • a portion 86 of each board 68, at the base of the contact fingers 82, 84, is folded as pictured and is placed within an axially elongated, generally radial recess 88 formed in the housing member 64, 66.
  • the contact fingers project chordwise of the housing member 64, 66, through windows provided for them in the side wall of recess 88. Some of these windows are designated 90.
  • a straight flat portion 92 of the circuit board 68, 70 is located within a slot 94 formed in the end wall of the recess 88.
  • a folded terminal carrying portion 96 of the circuit board 68, 70 is disposed rearwardly of the cover member 16, with the terminal end portions 78, 80 fitting within recesses formed therefor and are secured to the member 16 by means of clamp screws 98, 100.
  • the just described construction of the contact fingers 82, 84 and the lead conductors 74, 76 therefor can be mass produced economically and they, together with the split construction of the inner housing 64, 66 provide for an easy assembly of the internal working components of the switch 10.
  • the folded circuit boards 68, 70 are fitted onto the inner housing parts 64, 66. As shown by FIG. 3, the free ends of the contact fingers 82, 84 rest on a shelf 102 which is substantially in coplanar parallelism with the similar shelf 104 at the base of the windows 90.
  • the straight flat portions 92 of the circuit board member 68, 70 are positioned within additional slots 108 in rear cover member 16 which are alignable with the slots 94.
  • the inner housing parts 64, 66 are brought radially together on opposite sides of the tumbler set 106 (FIG. 2).
  • the tumbler set comprises the tumblers T and the sleeve 40.
  • the assemblage of the inner housing parts 64, 66, the folded circuit board 68, 70, the tumbler set 106 and cover 16 is slid endwise relatively into the outer casing 12, 14.
  • Screw fasteners 110 are inserted through openings 112 provided in the rear cover 16 and are threaded into interiorly tapped sockets formed in inner boss portions 114 which are integral with the side wall 12 of the casing 12, 14.
  • the fasteners 110 secure the cover member to the casing 12, 14 and indirectly hold the assembled internal components of the switch in proper position within the casing l2, 14.
  • Each set of contact fingers 82, 84 (i.e. each folded circuit board 68, forms with the set of tumblers T an independent switch.
  • a simple variation which would further increase the number of circuits of which the switch 10 may be a part would be to provide a separate lead-in wire (FIG. 15) for the rearmost paired contact fingers 82, 84.
  • a third circuit will be formed between conductor 74 and the third conductor 75.
  • the terminal 79 for the third conductor could be located between terminal 78, 80.
  • the rear cover 16 is shown to include a clamp screw 116 and a socket for the third terminal associated with each circuit board 68, 70.
  • the contact fingers 82, 84 in the illustrated embodiment, and the contact fingers in the non-illustrated normally closed switch embodiment, are spring members and contain sufficient spring energy to normally urge their central portions relatively tightly against the periphery of the tumblers T.
  • the central portions of the contact fingers 82, 84 are inwardly bent so as to form a projection which closely fits with the V groov'es or valleys 58 (FIG. 3).
  • the making or breaking of the electrical circuit in either the normally open switch or the normally closed switch can only be accomplished by rotating the tumblers T relative to each other about their supporting shaft means 18, 40, by means of the dialing knob 34, and then only by an authorized person who has knowledge of the number of turns to the right or left thereof to bring the various conductive or dielectric minor regions of the tumbler peripheries into contact with the contact fingers.
  • the knob 34 and hence shaft 18 and actuator arm 48, will be rotated several revolutions, so as to bring the driving pins 51, 52, beginning with the arm 48, into engagement with the driving webs or abutments 56 of the adjacent tumblers T so that the successive tumblers T will in turn be picked up” and be rotated along with the arm 48.
  • the first stop at the indicator mark 120 (FIG. 2) will result in the conductive segment 62 of the front tumbler T being brought into engagement with its respective contact fingers 82, 84, thus initially establishing a current path through these two contact fingers and the forward conductive segment 62 alone.
  • the knob 34 is rotated in the opposite direction. This causes the driving pin 51 on the actuator arm 48 to first disengage itself from one side of the driving web 56 of the rear tumbler, and to then rotate around into engagement with the other side of said web 56, causing driving pin 52 of the rear or fourth tumbler T to pick up the web 56 of the third tumbler T immediately forwardly thereof, to rotate the same in said opposite direction.
  • Pin 52 of the third tumbler T will pick up the web 56 of the second tumbler T, to rotate the same until its conductive segment 62 is engaged by the tips of its respective contact fingers 82, 84, and held against further rotation thereby.
  • the circuit path has been extended to also include the conductive region 62 of the second tumbler T and the two contact fingers 82, 84 in contact therewith. Additional rotation of the dial 34 and the actuator arm 48 in the original direction of rotation will similarly impart rotation to the third tumbler T to position its conductive segment 62 and the associated contact fingers 82, 84 in a contact making position.
  • the tumblers T are constructed so that they can be used to quickly and conveniently vary the relative azimuthal positions of the pins and webs 52, 56 relative to the dial indicia to establish almost an indefinite number of different combinations.
  • a preferred embodiment of the tumbler construction making the large number of combination changes possible will now be described.
  • each outer tumbler portion 42 is recessed to receive a greater portion of the inner tumbler portion 36.
  • the forward side of each outer tumbler portion 42 is recessed at 120, immediately bordering the central opening 42, to form a one sided annular groove or rabbet that is slightly larger in diameter than the central opening 44.
  • the axial extension 46 of the inner tumbler portion 36 includes a radial flange or annulet 122 which is fittable into the rabbet 120. The forward portion of the annulet 122 is beveled so that the inner tumbler portion 36 can be snapped fitted into the outer tumbler portion 42.
  • the lock means provided for normally connecting the inner and outer tumbler portions 36, 42 together for conjoint rotation includes a radially movable lock member 124.
  • the outer tumbler portion 42 is formed to include a radial slideway 126 in which the lock member 124 is received.
  • the slideway, 126 is defined in part by a pair of wings 128, 130 which serve to retain the member 124 in the slideway 126 in the axial direction.
  • the fit between the lock member 124 and the slideway 126 is loose enough to permit the member 124 to move easily in the radial direction.
  • the inwardly directed end portion of member 124 is serrated or otherwise patterned and the peripheral surface of the inner tumbler portion 36 is complementarily patterned at 134.
  • a circumferential groove 136 is formed in the member 42 radially outwardly from the slideway 126.
  • This groove 136 has a continuous outer radial boundary and includes inner radial restraining or boundary means 138, 140 only at its ends.
  • the intermediate portion of the spring seat 136 is unrestrained or bounded in the radially inward direction.
  • a normally inwardly biased leaf spring 142 is fitted within the spring seat 136. It includes an intermediate portion which rests on the lock member 124 and serves to bias it radially inwardly, causing its serrations 132 to mate with the serrations 134 on the inner tumbler part 136.
  • a release pin receiving opening 144 is provided axially through the radial wall portion 146 of each tumbler outer portion 42 in a region which is normally at least partially covered by a midportion of the lock member 124.
  • the angle X (FIG. 8) between the center of opening 144 and the center of the conductive segment 62 is the same for each tumbler T.
  • the openings 144 are also axially aligned with each other and with an opening 148 in the rear cover (FIG. 2).
  • Each lock member 124 is surrounded by a camming surface 152.
  • the leaf spring 142 normally urges the member 124 into a position in which its opening 150 is positioned slightly radially inwardly of the corresponding opening 144, and the radially outer portion of the cam surface 152 is generally aligned with the openings 144.
  • the combination of a given switch 10 is simply and quickly changed by a person dialing the existing combination to place the segment 62 in line and the openings 144 in alignment with each other and with the rear cover opening 148. Then an elongated pin 154 is inserted successively first through the opening 148 and then the openings 144 in the respective outer tumbler portions 42. Wall means 149 may be provided to make opening 148 be an elongated guide passageway for the pin 154.
  • the pin 154 Since entrance into the openings 144 is partially blocked by the lock members 124, the pin 154 must first move the lock levers 124 out of the way.
  • the sloping cam surface 152 serves to facilitate this movement.
  • the force of the pin 154 on the incline set cam surface 152 causes an outward sliding movement of the lock member 124 within its slideway 126 against the resistance of the leaf spring 142.
  • pin 154 When pin 154 is situated within the openings 144 it serves to hold the patterned end portions 132 of the lock members 124 radially outwardly from a position of locking engagement with the patterned peripheries 134 of the inner tumbler portions 136. It also serves to lock together the outer tumbler portions 42 and hold them in a constant position with respect to the contact fingers 82, 84.
  • a second spring seat 156 is located diametrically across the tumbler outer portion 42 from spring seat 136. It is .of similar construction, having means at its two ends for holding a second leaf spring 158.
  • This second leaf spring 158 is biased radially inwardly and rests on the pattern periphery 134 of the tumbler inner portion 36. Its function is to retard relative rotation between the two tumbler parts 36, 42, so that rotation will not occur unless it is positively caused by a rotation of the inner tumbler portion 36 relative to the outer tumbler portion 42. [n this respect it has the same rotational retarding effect as the contact fingers 82, 84 on the tumblers T in their entireties.
  • a permutation switch tumbler comprising an inner portion which in use rotates about a central support; an annular outer portion surrounding said inner portion, said outer portion having conductive and dielectric regions; and a radially movable releasable lock member carried by one of said portions, said lock member being movable radially between a lock position wherein it makes locking engagement with the other portion and the two portions are locked together for conjoint rotation, and a release position wherein it is free of engagement with said other portion and the two tumbler portions are rotatable relative to each other, said lock member including an oblique side located cam surface oriented such that a generally axial inward force against said surface will cause a radial sliding movement of the locking lever from its lock position into its release position.
  • a permutation switchtumbler according to claim 1, wherein said inner portion has a patterned periphery, said lock member is carried by said outer portion and has a patterned end portion directed towards said periphery, and said tumbler further includes spring means normally urging said releasable lock member towards the inner portion and its patterned free end portion against the patterned periphery of said inner portion.
  • a permutation switch tumbler according to claim 2 further including second spring means anchored on said outer portion and exerting a drag force on said inner portion when the two portions are not locked together.
  • a permutation switch tumbler according to claim 1 wherein said outer portion comprises a radially directed slideway for receiving the lock member, and a circumferentially extending leaf spring retaining recess positioned radially outwardly of said slideway, wherein said lock member is slidably received in said slideway, and wherein a springis contained within said spring recess, said spring serving to normally urge the lock member radially inwardly toward the inner portion of the tumbler.
  • a permutation switch tumbler wherein said spring means is a leaf spring and said spring recess includes means holding the end portions of said leaf spring, with an intermediate portion of said spring being bowed and in force applying contact with said lock member.
  • a permutation switch of a type comprising a plurality of coaxial, independently rotatable, generally cylindrical tumblers, each of which has conductive and dielectric peripheral regions, conductor elements resting on the periphery of each tumbler, a tumbler control member, and means associated with said tumblers and operable upon selective rotation of said tumbler control member for rotating said tumblers into positions wherein the conductive segments are in circuit-making contact with the conductor elements or the dielectric regions are in circuit-breaking contact with the conductor elements, the improvement comprising: said conductor elements comprising a plurality of spring fingers, and said switch including a circuit board to which end portions of said fingers are secured, electric conductor strips on said circuit board extending from at least some of said fingers, each to a terminal, said tumblers being at least partially surrounded by a dielectric support member formed to engage portions of said circuit board and hold said fingers in position to contact said tumblers.
  • said dielectric support member includes a recess for receiving a portion of the circuit board which is situated adjacent where the spring fingers connect to the circuit board.
  • said support member includes means for supporting the opposite ends of the spring fingers, said spring fingers being unrestrained between their ends and each including an intermediate portion which is in contact with the periphery of one of the tumblers.
  • the permutation switch improvement of claim 6, further including a wall portion formed to include terminal stations, with said circuit board including a portion extending to said terminal stations and serving to place the said terminals at said terminal stations.
  • said wall portion is a radial wall spaced rearwardly of said tumblers, said radial wall includes a slot for receiving a portion of the circuit board, and a terminal end portion of the circuit board is on the opposite side of said wall from said tumblers and is folded back against said radial wall.
  • said dielectric support member is in part at least a segment of a cylinder, said member includes an axially extending recess formed in an outer portion thereof which is sized to receive a portion of the circuit board which is situated immediately inwardly of where the spring fingers connect to the circuit board.
  • said support member includes means for supporting the opposite ends of the spring fingers, said spring fingers being unrestrained between their ends and each including an intermediate portion which is in contact with the periphery of one of the tumblers.
  • said support member includes means for supporting the opposite ends of the spring fingers, said spring fingers being unrestrained between their ends and each including an intermediate portion which is in contact with the periphery of one of the tumblers.

Landscapes

  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Tumbler Switches (AREA)
  • Contacts (AREA)
  • Lock And Its Accessories (AREA)
US116172A 1971-02-17 1971-02-17 Permutation switch Expired - Lifetime US3691328A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11617271A 1971-02-17 1971-02-17

Publications (1)

Publication Number Publication Date
US3691328A true US3691328A (en) 1972-09-12

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ID=22365684

Family Applications (1)

Application Number Title Priority Date Filing Date
US116172A Expired - Lifetime US3691328A (en) 1971-02-17 1971-02-17 Permutation switch

Country Status (5)

Country Link
US (1) US3691328A (de)
CA (1) CA949629A (de)
CH (2) CH546005A (de)
DE (1) DE2165407C3 (de)
GB (2) GB1353216A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3801761A (en) * 1973-07-05 1974-04-02 F Green Combination electrical switch
US3878346A (en) * 1973-07-05 1975-04-15 Franklin L Green Combination electrical switch
US4472951A (en) * 1982-01-08 1984-09-25 Morden Lawrence E Combination lock
US4726204A (en) * 1985-02-08 1988-02-23 Minilock S.A. Key-less combination cylinder lock, and a combination-changing tool
US4787222A (en) * 1986-11-24 1988-11-29 Novatek Medical Inc. Combination lock for blood identification system
US6062051A (en) * 1993-09-18 2000-05-16 Nam; Du Hyun Dial lock slide for a slide fastener
US20070142788A1 (en) * 2005-12-13 2007-06-21 Philippe Kohlbrenner E-Module

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3801761A (en) * 1973-07-05 1974-04-02 F Green Combination electrical switch
US3878346A (en) * 1973-07-05 1975-04-15 Franklin L Green Combination electrical switch
US4472951A (en) * 1982-01-08 1984-09-25 Morden Lawrence E Combination lock
US4726204A (en) * 1985-02-08 1988-02-23 Minilock S.A. Key-less combination cylinder lock, and a combination-changing tool
US4787222A (en) * 1986-11-24 1988-11-29 Novatek Medical Inc. Combination lock for blood identification system
WO1990004076A1 (en) * 1988-10-05 1990-04-19 Novatek Medical, Inc. Combination lock for blood identification system
US6062051A (en) * 1993-09-18 2000-05-16 Nam; Du Hyun Dial lock slide for a slide fastener
US20070142788A1 (en) * 2005-12-13 2007-06-21 Philippe Kohlbrenner E-Module

Also Published As

Publication number Publication date
CA949629A (en) 1974-06-18
GB1372951A (en) 1974-11-06
DE2165407A1 (de) 1972-08-31
DE2165407C3 (de) 1975-01-16
CH546005A (de) 1974-02-15
CH559422A5 (de) 1975-02-28
DE2165407B2 (de) 1974-06-06
GB1353216A (en) 1974-05-15

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AS Assignment

Owner name: TECCOR ELECTRONICS, INC.

Free format text: CHANGE OF NAME;ASSIGNOR:ECC CORPORATION, A CORP. OF TEXAS;REEL/FRAME:005518/0099

Effective date: 19760412

Owner name: ECC CORPORATION (FORMERLY: ELECTRONIC CONTROL COR

Free format text: CHANGE OF NAME;ASSIGNOR:ELECTRONIC CONTROL CORPORATION;REEL/FRAME:005503/0268

Effective date: 19691230

AS Assignment

Owner name: BANKERS TRUST COMPANY, NEW YORK

Free format text: SECURITY INTEREST;ASSIGNOR:RANCO INCORPORATED A CORP. OF DELAWARE;REEL/FRAME:005758/0180

Effective date: 19900730