US3862389A - Positive stop electrical switch - Google Patents
Positive stop electrical switch Download PDFInfo
- Publication number
- US3862389A US3862389A US345089A US34508973A US3862389A US 3862389 A US3862389 A US 3862389A US 345089 A US345089 A US 345089A US 34508973 A US34508973 A US 34508973A US 3862389 A US3862389 A US 3862389A
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- Prior art keywords
- housing
- contact
- annular
- housings
- insulating material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
- H01H1/40—Contact mounted so that its contact-making surface is flush with adjoining insulation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/04—Cases; Covers
- H01H13/06—Dustproof, splashproof, drip-proof, waterproof or flameproof casings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/12—Movable parts; Contacts mounted thereon
- H01H13/14—Operating parts, e.g. push-button
- H01H13/18—Operating parts, e.g. push-button adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift
Definitions
- ABSTRACT 20 0?1 9 1 5g g yi A positive stop electrical switch having two-cup like f 200/155 C housings the openend of each mates and closedly telescopes on the othercausing the enclosed contacts [56] Refernces Cited to make and convey the electrical signal, thereon the y contacts act as a positive stop, or if necessary the U T STATES PATENTS contacts in conjunction with the shoulder of the hous 857,446 6/1907 Comstock 200/86 R ings act as a positive stop.
- the object of the invention is to provide an'electrical switch which .is an integral part of a positive stop such that the signal action and the stopping action occur simultaneously.
- a positive stop electrical switch having two cup like housings in which the open end of each mates and closedly telescopes on the other.
- the base housing contains a ring like contact having an external lead wire. Inside the ring contact is a disc like contact with an external lead wire.
- the ring contact, disc contact and base housing are insulated from each other.
- the operator housing encloses and is insulated from a disc contact.
- the machine cycle closedly telescopes the housings causing the disc in the operator. housing to contact the ring and disc in the base housing.
- the contacts are so constructed and supported that upon closing they either independently, orin conjunction with the shoulder of the housings, become a positive stop.
- FIG. 1 is a plan view of the cup like base half of the invention showing the inside arrangement.
- FIG. 2 is a plan view of the cup like operator half of the invention showing the inside arrangement.
- FIG. 3 is a cross sectional side view of the invention in its entirety taken at line 1-1 FIG. 1 and line 22 FIG. 2.
- the cup like base 1 has a circular cavity the bottom portion of which is slightly enlarged so as to mechanically hold in place the insulating material 2 such as, for example, plastic (see FIG. 3).
- a ring like contact 3 (see FIG. 1 and FIG. 3) connected to an external lead wire 4 which exits the base 1 through hole 5.
- a disc like contact 6 Also embedded in the insulation 2 is a disc like contact 6 connected to an external lead wire 7 which likewise exits the base 1 through the holeS.
- the ring contact 3 and the disc contact 6 are tapered such that they are mechanically held in the insulation 2 (see FIG. 3).
- the base 1 is provided with an annular shoulder 8 having a series of holes 9 for accepting the springs 10.
- Annular grooves 11 are provided in the insulation 2 and an annular groove 12 is provided at the outer edge of shoulder 8 (see FIG. 3).
- Thegrooves 11' andthe groove 12 accept sludgecaused by wear.
- the annular notch 13 accepts the outer portion of the O-ring 14 and allows it to act asboth a seal and a retainer.
- the anti-friction insert 15 in the base 1 aids the telescoping movement of the operator 20.
- the outer raised portion of the base 1 has annular sawteeth 16 for engaging and holding a protective and pliable band 17 such as, for example, a rubber-band. Winged bosses 18 with holes 19 project from the base I for mounting.
- the cup like operator 20' is made simular to the base 1.
- the operator 20 has a circular cavity the bottom portion of which is slightly enlarged so as to mechanically hold the insulation 21. Embedded in the insulation 21 is a disc like contact 22 tapered such that it is mechanically held in place.
- the annular groove 23 holds the O-ring 14 in place.
- the outer raised portion of the operator 20 has annular sawteeth 24 for holding the band 17 in place.
- the springs 10 press against the shoulder 25 of the operator 20 to maintain proper clearance between the operator contact '22 and the base contacts 3 and 6 (see FIG. 3).
- the clearance gap between the contacts may be partially filled with insulating oil.
- the positive stop limit switch is mounted to the stationary part of a machine.
- the workhead of the machine when near the end of its work stroke, contacts the outer face of the operator 20.
- the force of the springs 10 is overcome and the operator 20 is forced toward the base 1.
- the electrical signal is initiated (to return the workhead) and simultaneously the device mechanically acts as a positive stop.
- the positive stop electrical switch has now performed its dual functions of conveying an electrical signal and thereon acting as a positive stop.
- the shoulder 25 of operator 20 When the device is used on-small to medium size machines, the shoulder 25 of operator 20 will be machined a few thousandths below the surface of contact 22. This allows the contacts 3, 6, and 22 to act as a positive stop without any support from the shoulder 25 of operator 20. When medium to large machinery is encountered the shoulder 25 of operator 20 will be machined even with the surface of contact 22 and the shoulder 8 of base 1 will be machined even with the surface of contact 3 and contact 6. This allows said contacts and said shoulders to act together as a positive stop.
- a combined mechanical stop and electrical switch comprising a cuplike base housing and a cuplike operator housing disposed in opposed relationship to one another and positioned in slidable telescopic relationship to define a substantially closed chamber therebetween, each of said housings defining therein an inside cavity, a body of insulating material substantially filling each of said cavities and being fixed relative to the respec-' tive housing, an electrical contact embedded within each body of insulated material with said electrical contacts as mounted on the opposed housings being deposed opposite one another and positioned for contacting one another when said housings are slidably moved toward one another, the cavity in one of said housings having a bottom portion which is enlarged so as to mechanically hold the body of insulating material therein,
- said one housing comprising a disk having a tapered edge which is embedded and mechanically held within the respective body of insulating material, the exposed surface of said disk being substantially flush with the open end of said one housing, said one housing having an annular groove formed on the outer circumference thereof, an annular seal ring disposed within said groove and sealingly engaged between said pair of housings, and an annular flexible seal disposed in surrounding relationship to and extending between said pair of housings.
- a combined mechanical stop and electrical switch comprising first and second cuplike housings disposed opposite one another and positioned in sliding telescopic relationship to one another to define a substantially closed chamber therebetween, said first housing defining therein a first cavity which has a first body of insulating material fixed therein and a first electrical contact embedded within said first body of insulating taining a spring, said second housing having a second cavity formed in the bottom thereof and surrounded by said shoulder with said second cavity being filled with a second body of insulating material, the bottom portion of said second cavity being at least slightly enlarged to mechanically hold said second body of insulating material therein, a tapered ringlike contact embedded and mechanically held in said second body of insulating material, a tapered disk-shaped contact 'disposed within said ringlike contact and embedded and mechanically held in said second body ofinsulating material, a pair of external lead wires with one of said wires being connected to said ringlike contact and the other of said wires being conntected to said diskshaped contact, said
- a first cup-shaped housing including a first base wall and a first annular sidewall fixed to said base wall and projecting outwardly therefrom, said first annular sidewall defining a first cavity therein;
- a first body of insulating material positioned within said first cavity and fixed relative to said first housing;
- first electrical contact member fixedly mounted on said first body of insulating material, said first contact member having an exposed contact surface which faces the open end of said first housing;
- a second cup-shaped housing disposed opposite and slidably telescopically mounted on said first cupshaped housing for defining a substantially closed compartment therebetween, said second housing including a second base wall and a second annular sidewall fixed to said second base wall and projecting outwardly therefrom, said first and second annular sidewalls being slidably telescopically received one within the other, and said second annular'sidewall defining a second cavity which opens toward and is disposed opposite said first cavity;
- a second electrical contact member fixedly mounted on said second block of insulating material, said second contact member having an exposed contact surface which faces toward the open end of said second housing member whereby the exposed contact surfaces on said first and second contact member are disposed directly opposite one another;
- said first and second housing being relatively slidably movable toward and away from one another between a first position wherein said exposed contact surfaces are spaced from one another and a second position wherein said exposed contact surfaces engage one another;
- stop means coacting between said first and second housings for limiting relative movement of said first housing toward said second housing, said stop means including a first stop surface associated with said first housing and a second stop surface fixedly associated with said second housing, said first and second stop surfaces being disposed directly opposite one another and spaced apart when said firstand said second housings are in said first position, said stop surfaces being disposed in engagement with one another when said first and second housings are in said second position.
- said first contact member comprises a ringlike member
- said second contact member comprises a disklike member of a size sufficient to engage said ringlike member
- said first body of insulating material has a third contact member fixedly mounted thereon and positioned within but spaced from said ringlike member, said third contact member having an exposed contact surface thereon which is substantially flush with the contact surface formed on said ringlike member, whereby said disklike member engages both said ringlike member and said third contact member when said housings are in said second position, and a pair of electrical leads associated with said device and extending externally of said first housing, one of said leads being connected to said ringlike member and the other of said leads being connected to said third contact member.
- said first housing has an annular shoulder fixedly associated therewith and disposed within said first annular sidewall, said annular shoulder being spaced axially inwardly from the free end of said first annular sidewall, and said second annular sidewall being slidably telescopically received within said first annular sidewall, and said second annular sidewall having the free end thereof defining one of said stop surfaces thereon, and said annular shoulder defining the other stop surface thereon.
- a device accordinging to claim 5, further including an elongated flexible annular sleeve disposed in surrounding relationship to and extending axially between said first and second housings.
- a device further including spring means coacting between said first and second housings for normally resiliently urging same away from one another-to normally maintain said housings in said first position.
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- Push-Button Switches (AREA)
Abstract
A positive stop electrical switch having two cup like housings the open end of each mates and closedly telescopes on the other causing the enclosed contacts to make and convey the electrical signal, thereon the contacts act as a positive stop, or if necessary the contacts in conjunction with the shoulder of the housings act as a positive stop.
Description
Lowe
1 1 POSITIVE STOP ELECTRICAL SWITCH 3,383,487 5/1968 Wiener 200/168 G [76] Inventor: Charles Thomas Lowe, 5165 Torrey I Rd., Flint, Mich, 48507 Primary ExaminerG. Rubinson Assistant Examiner-William J. Smith [22] Fled: 1973 3 Attorney, Agent, or FirmWodhams, Blanchard and 21 Appl. No.: 345,089 Flynn [52] US. Cl. 200/302, 200/86 R, 200/159 R [57] ABSTRACT 20 0?1 9 1 5g g yi A positive stop electrical switch having two-cup like f 200/155 C housings the openend of each mates and closedly telescopes on the othercausing the enclosed contacts [56] Refernces Cited to make and convey the electrical signal, thereon the y contacts act as a positive stop, or if necessary the U T STATES PATENTS contacts in conjunction with the shoulder of the hous 857,446 6/1907 Comstock 200/86 R ings act as a positive stop. 1,622,809 3/1927 Rodman 200/150 A 1,935,838 11/1933 Efstathiou 200/86 R 7 Claims, 3 Drawing Figures I I; 23 p 4 2 22 g 7 2/ v I 1 1 Jan. 21, 1975 POSITIVE STOP ELECTRICAL SWITCH This invention relates to a'device having the duel functions of conveying an electrical signal and being a positive stop.
The object of the invention is to provide an'electrical switch which .is an integral part of a positive stop such that the signal action and the stopping action occur simultaneously. I
This object is accomplished by providing a positive stop electrical switch having two cup like housings in which the open end of each mates and closedly telescopes on the other. The base housing contains a ring like contact having an external lead wire. Inside the ring contact is a disc like contact with an external lead wire. The ring contact, disc contact and base housing are insulated from each other. The operator housing encloses and is insulated from a disc contact. The machine cycleclosedly telescopes the housings causing the disc in the operator. housing to contact the ring and disc in the base housing. The contacts are so constructed and supported that upon closing they either independently, orin conjunction with the shoulder of the housings, become a positive stop.
The advantages and economies of the positive stop electrical switch will become clear from the following detailed description, with reference to the accompanying drawings, in which:
FIG. 1 is a plan view of the cup like base half of the invention showing the inside arrangement.
FIG. 2 is a plan view of the cup like operator half of the invention showing the inside arrangement.
FIG. 3 is a cross sectional side view of the invention in its entirety taken at line 1-1 FIG. 1 and line 22 FIG. 2.
The cup like base 1, preferrably made of metal,,has a circular cavity the bottom portion of which is slightly enlarged so as to mechanically hold in place the insulating material 2 such as, for example, plastic (see FIG. 3). Embedded in the insulation 2 is a ring like contact 3 (see FIG. 1 and FIG. 3) connected to an external lead wire 4 which exits the base 1 through hole 5. Also embedded in the insulation 2 is a disc like contact 6 connected to an external lead wire 7 which likewise exits the base 1 through the holeS. The ring contact 3 and the disc contact 6 are tapered such that they are mechanically held in the insulation 2 (see FIG. 3).
The base 1 is provided with an annular shoulder 8 having a series of holes 9 for accepting the springs 10.
Annular grooves 11 are provided in the insulation 2 and an annular groove 12 is provided at the outer edge of shoulder 8 (see FIG. 3). Thegrooves 11' andthe groove 12 accept sludgecaused by wear.
The annular notch 13 accepts the outer portion of the O-ring 14 and allows it to act asboth a seal and a retainer. The anti-friction insert 15 in the base 1 aids the telescoping movement of the operator 20.
. The outer raised portion of the base 1 has annular sawteeth 16 for engaging and holding a protective and pliable band 17 such as, for example, a rubber-band. Winged bosses 18 with holes 19 project from the base I for mounting. The cup like operator 20', preferrably made of metal, is made simular to the base 1. The operator 20 has a circular cavity the bottom portion of which is slightly enlarged so as to mechanically hold the insulation 21. Embedded in the insulation 21 is a disc like contact 22 tapered such that it is mechanically held in place. The annular groove 23 holds the O-ring 14 in place. The outer raised portion of the operator 20 has annular sawteeth 24 for holding the band 17 in place.
' The springs 10 press against the shoulder 25 of the operator 20 to maintain proper clearance between the operator contact '22 and the base contacts 3 and 6 (see FIG. 3). To suppress arcing of said contacts when the electrical circuit is broken, the clearance gap between the contacts may be partially filled with insulating oil.
In operation the positive stop limit switch is mounted to the stationary part of a machine. The workhead of the machine, when near the end of its work stroke, contacts the outer face of the operator 20. The force of the springs 10 is overcome and the operator 20 is forced toward the base 1. As the operator contact 22 comes into contact with the base contacts 3 and 6 the electrical signal is initiated (to return the workhead) and simultaneously the device mechanically acts as a positive stop. The positive stop electrical switch has now performed its dual functions of conveying an electrical signal and thereon acting as a positive stop.
When the device is used on-small to medium size machines, the shoulder 25 of operator 20 will be machined a few thousandths below the surface of contact 22. This allows the contacts 3, 6, and 22 to act as a positive stop without any support from the shoulder 25 of operator 20. When medium to large machinery is encountered the shoulder 25 of operator 20 will be machined even with the surface of contact 22 and the shoulder 8 of base 1 will be machined even with the surface of contact 3 and contact 6. This allows said contacts and said shoulders to act together as a positive stop.
- Having thus described my invention I claim as new and desire to secure by Letters Patent:
1. A combined mechanical stop and electrical switch, comprising a cuplike base housing and a cuplike operator housing disposed in opposed relationship to one another and positioned in slidable telescopic relationship to define a substantially closed chamber therebetween, each of said housings defining therein an inside cavity, a body of insulating material substantially filling each of said cavities and being fixed relative to the respec-' tive housing, an electrical contact embedded within each body of insulated material with said electrical contacts as mounted on the opposed housings being deposed opposite one another and positioned for contacting one another when said housings are slidably moved toward one another, the cavity in one of said housings having a bottom portion which is enlarged so as to mechanically hold the body of insulating material therein,
and the contact as associated with said one housing comprising a disk having a tapered edge which is embedded and mechanically held within the respective body of insulating material, the exposed surface of said disk being substantially flush with the open end of said one housing, said one housing having an annular groove formed on the outer circumference thereof, an annular seal ring disposed within said groove and sealingly engaged between said pair of housings, and an annular flexible seal disposed in surrounding relationship to and extending between said pair of housings.
2. A combined mechanical stop and electrical switch, comprising first and second cuplike housings disposed opposite one another and positioned in sliding telescopic relationship to one another to define a substantially closed chamber therebetween, said first housing defining therein a first cavity which has a first body of insulating material fixed therein and a first electrical contact embedded within said first body of insulating taining a spring, said second housing having a second cavity formed in the bottom thereof and surrounded by said shoulder with said second cavity being filled with a second body of insulating material, the bottom portion of said second cavity being at least slightly enlarged to mechanically hold said second body of insulating material therein, a tapered ringlike contact embedded and mechanically held in said second body of insulating material, a tapered disk-shaped contact 'disposed within said ringlike contact and embedded and mechanically held in said second body ofinsulating material, a pair of external lead wires with one of said wires being connected to said ringlike contact and the other of said wires being conntected to said diskshaped contact, said wires extending through a hole provided in said second housing, the exposed surfaces of said ringlike contact and said disk-shaped contact being substantially flush with the plane of said annular shoulder, said second body of insulating material being provided with an annular groove therein between said ringlike contact and said disk-shaped contact, said second body of insulating material having a further annular groove formed therein between said ring-shaped contact and said shoulder, and said second housing having an annular groove formed therein between said shoulder and said wall portion, said wall portion having an annular notch on the inside circumference thereof adapted to accommodate therein an annular sealing ring, an annular antifriction insert mounted on the inside circumference of said wall portion adjacent the open end of said second housing, and the outer circumference of said second housing having projection means positioned for engagement with a flexible annular shield adapted to surround and'extend between said first and second housings.
3. In an electrical switch device, the improvement comprising:
a first cup-shaped housing including a first base wall and a first annular sidewall fixed to said base wall and projecting outwardly therefrom, said first annular sidewall defining a first cavity therein;
a first body of insulating material positioned within said first cavity and fixed relative to said first housing;
a first electrical contact member fixedly mounted on said first body of insulating material, said first contact member having an exposed contact surface which faces the open end of said first housing;
a second cup-shaped housing disposed opposite and slidably telescopically mounted on said first cupshaped housing for defining a substantially closed compartment therebetween, said second housing including a second base wall and a second annular sidewall fixed to said second base wall and projecting outwardly therefrom, said first and second annular sidewalls being slidably telescopically received one within the other, and said second annular'sidewall defining a second cavity which opens toward and is disposed opposite said first cavity;
a second block of insulating material disposed within said second cavity and fixed relative to said second housing;
a second electrical contact member fixedly mounted on said second block of insulating material, said second contact member having an exposed contact surface which faces toward the open end of said second housing member whereby the exposed contact surfaces on said first and second contact member are disposed directly opposite one another;
said first and second housing being relatively slidably movable toward and away from one another between a first position wherein said exposed contact surfaces are spaced from one another and a second position wherein said exposed contact surfaces engage one another; and
mechanical stop means coacting between said first and second housings for limiting relative movement of said first housing toward said second housing, said stop means including a first stop surface associated with said first housing and a second stop surface fixedly associated with said second housing, said first and second stop surfaces being disposed directly opposite one another and spaced apart when said firstand said second housings are in said first position, said stop surfaces being disposed in engagement with one another when said first and second housings are in said second position.
4. A device according to claim 3, wherein said first contact member comprises a ringlike member, wherein said second contact member comprisesa disklike member of a size sufficient to engage said ringlike member, and wherein said first body of insulating material has a third contact member fixedly mounted thereon and positioned within but spaced from said ringlike member, said third contact member having an exposed contact surface thereon which is substantially flush with the contact surface formed on said ringlike member, whereby said disklike member engages both said ringlike member and said third contact member when said housings are in said second position, and a pair of electrical leads associated with said device and extending externally of said first housing, one of said leads being connected to said ringlike member and the other of said leads being connected to said third contact member. 1
5. A device according to claim 3, wherein said first housing has an annular shoulder fixedly associated therewith and disposed within said first annular sidewall, said annular shoulder being spaced axially inwardly from the free end of said first annular sidewall, and said second annular sidewall being slidably telescopically received within said first annular sidewall, and said second annular sidewall having the free end thereof defining one of said stop surfaces thereon, and said annular shoulder defining the other stop surface thereon.
6. A device acording to claim 5, further including an elongated flexible annular sleeve disposed in surrounding relationship to and extending axially between said first and second housings.
7. A device according to claim 6, further including spring means coacting between said first and second housings for normally resiliently urging same away from one another-to normally maintain said housings in said first position.
Claims (7)
1. A combined mechanical stop and electrical switch, comprising a cuplike base housing and a cuplike operator housing disposed in opposed relationship to one another and positioned in slidable telescopic relationship to define a substantially closed chamber therebetween, each of said housings defining therein an inside cavity, a body of insulating material substantially filling each of said cavities and being fixed relative to the respective housing, an electrical contact embedded within each body of insulated material with said electrical contacts as mounted on the opposed housings being deposed opposite one another and positioned for contacting one another when said housings are slidably moved toward one another, the cavity in one of said housings having a bottom portion which is enlarged so as to mechanically hold the body of insulating material therein, and the contact as associated with said one housing comprising a disk having a tapered edge which is embedded and mechanically held within the respective body of insulating material, the exposed surface of said disk being substantially flush with the open end of said one housing, said one housing having an annular groove formed on the outer circumference thereof, an annular seal ring disposed within said groove and sealingly engaged between said pair of housings, and an annular flexible seal disposed in surrounding relationship to and extending between said pair of housings.
2. A combined mechanical stop and electrical switch, comprising first and second cuplike housings disposed opposite one another and positioned in sliding telescopic relationship to one another to define a substantially closed chamber therebetween, said first housing defining therein a first cavity which has a first body of insulating material fixed therein and a first electrical contact embedded within said first body of insulating material, the second housing having a wall portion wHich projects inwardly from the open end of the housing to a point about midway of the housing, said wall portion being of reduced thickness to define an inner annular shoulder at the inner end thereof, said shoulder having a plurality of openings formed therein each containing a spring, said second housing having a second cavity formed in the bottom thereof and surrounded by said shoulder with said second cavity being filled with a second body of insulating material, the bottom portion of said second cavity being at least slightly enlarged to mechanically hold said second body of insulating material therein, a tapered ringlike contact embedded and mechanically held in said second body of insulating material, a tapered disk-shaped contact disposed within said ringlike contact and embedded and mechanically held in said second body of insulating material, a pair of external lead wires with one of said wires being connected to said ringlike contact and the other of said wires being conntected to said disk-shaped contact, said wires extending through a hole provided in said second housing, the exposed surfaces of said ringlike contact and said disk-shaped contact being substantially flush with the plane of said annular shoulder, said second body of insulating material being provided with an annular groove therein between said ringlike contact and said disk-shaped contact, said second body of insulating material having a further annular groove formed therein between said ring-shaped contact and said shoulder, and said second housing having an annular groove formed therein between said shoulder and said wall portion, said wall portion having an annular notch on the inside circumference thereof adapted to accommodate therein an annular sealing ring, an annular antifriction insert mounted on the inside circumference of said wall portion adjacent the open end of said second housing, and the outer circumference of said second housing having projection means positioned for engagement with a flexible annular shield adapted to surround and extend between said first and second housings.
3. In an electrical switch device, the improvement comprising: a first cup-shaped housing including a first base wall and a first annular sidewall fixed to said base wall and projecting outwardly therefrom, said first annular sidewall defining a first cavity therein; a first body of insulating material positioned within said first cavity and fixed relative to said first housing; a first electrical contact member fixedly mounted on said first body of insulating material, said first contact member having an exposed contact surface which faces the open end of said first housing; a second cup-shaped housing disposed opposite and slidably telescopically mounted on said first cup-shaped housing for defining a substantially closed compartment therebetween, said second housing including a second base wall and a second annular sidewall fixed to said second base wall and projecting outwardly therefrom, said first and second annular sidewalls being slidably telescopically received one within the other, and said second annular sidewall defining a second cavity which opens toward and is disposed opposite said first cavity; a second block of insulating material disposed within said second cavity and fixed relative to said second housing; a second electrical contact member fixedly mounted on said second block of insulating material, said second contact member having an exposed contact surface which faces toward the open end of said second housing member whereby the exposed contact surfaces on said first and second contact member are disposed directly opposite one another; said first and second housing being relatively slidably movable toward and away from one another between a first position wherein said exposed contact surfaces are spaced from one another and a second position wherein said exposed contact surfaces engage one another; and mechanical stop means coacting between said first and second housings for limiting relative movement of said first housing toward said second housing, said stop means including a first stop surface associated with said first housing and a second stop surface fixedly associated with said second housing, said first and second stop surfaces being disposed directly opposite one another and spaced apart when said first and said second housings are in said first position, said stop surfaces being disposed in engagement with one another when said first and second housings are in said second position.
4. A device according to claim 3, wherein said first contact member comprises a ringlike member, wherein said second contact member comprises a disklike member of a size sufficient to engage said ringlike member, and wherein said first body of insulating material has a third contact member fixedly mounted thereon and positioned within but spaced from said ringlike member, said third contact member having an exposed contact surface thereon which is substantially flush with the contact surface formed on said ringlike member, whereby said disklike member engages both said ringlike member and said third contact member when said housings are in said second position, and a pair of electrical leads associated with said device and extending externally of said first housing, one of said leads being connected to said ringlike member and the other of said leads being connected to said third contact member.
5. A device according to claim 3, wherein said first housing has an annular shoulder fixedly associated therewith and disposed within said first annular sidewall, said annular shoulder being spaced axially inwardly from the free end of said first annular sidewall, and said second annular sidewall being slidably telescopically received within said first annular sidewall, and said second annular sidewall having the free end thereof defining one of said stop surfaces thereon, and said annular shoulder defining the other stop surface thereon.
6. A device acording to claim 5, further including an elongated flexible annular sleeve disposed in surrounding relationship to and extending axially between said first and second housings.
7. A device according to claim 6, further including spring means coacting between said first and second housings for normally resiliently urging same away from one another to normally maintain said housings in said first position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US345089A US3862389A (en) | 1973-03-26 | 1973-03-26 | Positive stop electrical switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US345089A US3862389A (en) | 1973-03-26 | 1973-03-26 | Positive stop electrical switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3862389A true US3862389A (en) | 1975-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US345089A Expired - Lifetime US3862389A (en) | 1973-03-26 | 1973-03-26 | Positive stop electrical switch |
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| US (1) | US3862389A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2435752A2 (en) * | 1978-09-05 | 1980-04-04 | Graniou Louis Electr | Sealing of opto-electronic pushbutton - requires sealing ring in groove of rubber ring glued to cap |
| US4386253A (en) * | 1979-11-15 | 1983-05-31 | Hundt & Weber Schaltgerate Gmbh | Switch |
| WO1988010503A1 (en) * | 1987-06-27 | 1988-12-29 | Swf Auto-Electric Gmbh | Electric switch, in particular steering column switch for motor vehicles |
| WO1994016373A1 (en) * | 1993-01-12 | 1994-07-21 | A-Dec, Inc. | Seal for push-button switches |
| WO1999063560A1 (en) * | 1998-06-01 | 1999-12-09 | Tapeswitch Corporation | Electrical switch mat |
| US6483058B2 (en) | 2000-09-07 | 2002-11-19 | Itt Manufacturing Enterprises, Inc. | Sealed manual reset switch |
| EP4063070A1 (en) * | 2021-03-26 | 2022-09-28 | Raytheon Technologies Corporation | Machining fixture and method of using the same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US857446A (en) * | 1903-11-24 | 1907-06-18 | Homer G Comstock | Block-signal system for railways. |
| US1622809A (en) * | 1921-10-25 | 1927-03-29 | Westinghouse Electric & Mfg Co | Insulating liquid |
| US1935838A (en) * | 1931-10-10 | 1933-11-21 | Efstathiou Theofanis | Signaling apparatus |
| US3383487A (en) * | 1966-07-18 | 1968-05-14 | Wiener Robert | Thin flexible magnetic switch |
-
1973
- 1973-03-26 US US345089A patent/US3862389A/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US857446A (en) * | 1903-11-24 | 1907-06-18 | Homer G Comstock | Block-signal system for railways. |
| US1622809A (en) * | 1921-10-25 | 1927-03-29 | Westinghouse Electric & Mfg Co | Insulating liquid |
| US1935838A (en) * | 1931-10-10 | 1933-11-21 | Efstathiou Theofanis | Signaling apparatus |
| US3383487A (en) * | 1966-07-18 | 1968-05-14 | Wiener Robert | Thin flexible magnetic switch |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2435752A2 (en) * | 1978-09-05 | 1980-04-04 | Graniou Louis Electr | Sealing of opto-electronic pushbutton - requires sealing ring in groove of rubber ring glued to cap |
| US4386253A (en) * | 1979-11-15 | 1983-05-31 | Hundt & Weber Schaltgerate Gmbh | Switch |
| WO1988010503A1 (en) * | 1987-06-27 | 1988-12-29 | Swf Auto-Electric Gmbh | Electric switch, in particular steering column switch for motor vehicles |
| EP0297388A1 (en) * | 1987-06-27 | 1989-01-04 | SWF Auto-Electric GmbH | Electric switch, in particular a steering wheel switch for a motor vehicle |
| WO1994016373A1 (en) * | 1993-01-12 | 1994-07-21 | A-Dec, Inc. | Seal for push-button switches |
| US5413358A (en) * | 1993-01-12 | 1995-05-09 | A-Dec, Inc. | Seal for push-button switches |
| WO1999063560A1 (en) * | 1998-06-01 | 1999-12-09 | Tapeswitch Corporation | Electrical switch mat |
| US6054658A (en) * | 1998-06-01 | 2000-04-25 | Tapeswitch Corporation | Electrical switch mat |
| US6483058B2 (en) | 2000-09-07 | 2002-11-19 | Itt Manufacturing Enterprises, Inc. | Sealed manual reset switch |
| EP4063070A1 (en) * | 2021-03-26 | 2022-09-28 | Raytheon Technologies Corporation | Machining fixture and method of using the same |
| EP4327977A3 (en) * | 2021-03-26 | 2024-05-01 | RTX Corporation | Machining fixture positioning switch |
| US12226869B2 (en) | 2021-03-26 | 2025-02-18 | Rtx Corporation | Machining fixture positioning switch |
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