US3803375A - Hinge plate switch structure - Google Patents
Hinge plate switch structure Download PDFInfo
- Publication number
- US3803375A US3803375A US00343545A US34354573A US3803375A US 3803375 A US3803375 A US 3803375A US 00343545 A US00343545 A US 00343545A US 34354573 A US34354573 A US 34354573A US 3803375 A US3803375 A US 3803375A
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- United States
- Prior art keywords
- hinge
- hinge plate
- abutment
- electrical circuit
- circuit control
- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
- H01H3/16—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch 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. for a door switch, a limit switch, a floor-levelling switch of a lift
- H01H3/161—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch 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. for a door switch, a limit switch, a floor-levelling switch of a lift for actuation by moving a closing member, e.g. door, cover or lid
- H01H3/162—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch 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. for a door switch, a limit switch, a floor-levelling switch of a lift for actuation by moving a closing member, e.g. door, cover or lid associated with a hinge of the closing member
Definitions
- the present invention relates generally to improvements in door hinge structures equipped with means for controlling an electrical circuit.
- the present application discloses a pair of hingedly coupled hinge plates or leaves in which one of the hinge plates supports switch means and the other hinge plates supports an adjustably projectable abutment member adapted to engage a complementary shiftable switch controlling member projecting from the other hinge plate.
- the adjustably projectable element comprises an electrically nonconductive generally cylindrical member adapted to be rotated for the purpose of axially shifting said member to position the exposed surface, thereof a predetermined distance from the exposed surface of the hinge plate on which said member is mounted.
- the present invention contemplates a hinge structure equipped with electrical control means of the general type referred to above, wherein novel, axially or longitudinally abutment means is provided in association with the hinge plate attached to the door member.
- the present invention presents an improved novel arrangement'whereby the extent of projection of a switch actuating member beyond the exposed surface of a hinge plate attached to a door member may be installed and adjusted with a minimum amount of effort and skill.
- FIG. 1 is afragmentary perspective view of a door and door jamb having in association therewith a novel hinge structure of the type contemplated by the present invention
- FIG. 2 is an enlarged perspective view of the hinge structure shown in FIG. I, more clearly to illustrate the electrical switch device and applicant's novel axially adjustable generally cylindrical abutment means for actuating said switch device;
- FIG. 3 is a fragmentary vertical sectional view of the hinge plates of FIG. 2 and the elements. associated therewith as said hinge plates are approaching each other;
- FIG. 4 is a fragmentary vertical sectional view similar to FIG. 3 disclosing the above-mentioned hinge plates after the adjustable abutment means carried by one of the plates has been moved into engagement with the switch actuating projection associated with the other hinge plate;
- FIG. 5 is a detailed vertical sectional view taken substantially along the line 55 of FIG. 2 more clearly to ating abutment means, a C-ring normally attached to v the abutment member being shown in detached relation thereto.
- FIG. 1 a hinge structure representative of one embodiment of the present invention is designated generally by the numeral 10, FIG. 1 and 2.
- the hinge structure 10 is illustrated in operative association with a door member 12 and a door jamb 14.
- the hinge structure 10 comprises two hinge plates or leaves 16 and 18.
- the hinge plate l6' is provided with a plurality of screw accommodating apertures 20 to facilitate attachment thereof the vertical edge of the door member 12.
- a hinge plate 18 is provided with a plurality of screw accommodating apertures 22 to facilitate attachment of the hinge plate to the door jamb 14.
- An electrical circuit control device or switch mechanism 24 is suitably attached to the rear or unexposed side of the hinge plate 18 as clearly shown in FIG. 2 to 4 inclusive.
- the circuit control device 24, being secured to the side of the hinge leaf attached directly to the door jamb is lodged within a complementary recess in said jamb.
- the control mechanism 24 as disclosed herein is commonly marketed under the trademark Micro-Switch, obviously the present invention is not limited to any specific design of switch mechanism but contemplates the use of various available electrical control devices which may be operated as an incident to the shifting of a shiftable control element such as the element designated by the numeral 26.
- the control element or button 26 may be shifted from the projected position shown in FIG. 3 to the position shown in FIG. 4 for actuating the switch mechanism 24.
- Suitable terminal members 28 are adapted to accommodate electrical conductors (not shown). It will be noted that the shiftable switch control or contact member 26 is biased to the left as viewed in FIGS. 3 and 4 through the agency of a leaf spring 30. Thus in order to shift the element 26 from its position of maximum projection beyond the exposed surface of the hinge plate 18 to its retracted position shown in FIG. 4 the force of the leaf spring 30 must be overcome.
- a generally cylindrical abutment member 32 is eventually moved into engagement with the shiftable element 26 as clearly shown in FIG. 4.
- the abutment member 32 may be axially adjusted within aperture 34 provided in the hinge plate 16 FIG. 3 and 4.
- the abutment member 32 may be formed from suitable electrical nonconducting material as for example nylon. Material such as nylon affords the resiliency required to maintain the abutment 32 in a fixed position of adjustment. Obviously other suitable material may be used.
- a tight fit of the abutment 32 within the aperture 34 of the hinge plate 16 serves to secure the abutment in any desired position of projection beyond the exposed surface of the hinge plate 16.
- a suitable spanner wrench or tool 36 as illustrated in FIG.
- a suitable C-ring 38 may be attached to the shank of the abutment 32 as clearly shown in FIGS. 3 and 4.
- the C-ring 38 serves to prevent the installer or anyone who may tamper with the abutment 32 from completely backing out said abutment.
- a head 38a at the opposite extremity prevents the abutment from being urged clear through the hinge plate 16.
- the abutment accommodating aperture 34 of the hinge plate 16 may be threaded so as to accommodate a smooth unthreaded shank of the abutment 32.
- the thread convolutions in the hinge plate 16 will cause corresponding thread convolutions to be indented or impressed within the softer plastic abutment so as to assure a verytight fit which can only be overcome by the application of a suitable turning tool such as the spanner tool 36.
- FIG. 6 a slightly modified switch mechanism designated generally by the numeral 24a is disclosed. This illustration is incorporated in the drawing merely to illustrate that various modifications of switch mechanisms may be employed to function in cooperation with the abutment 32.
- a projecting button or switch control element 26a of the switch mechanism 24a is adapted to be engaged by the exposed extremity of the axially adjustable abutment member 32.
- abutment means adjustably projectable from the exposed surface of said first hinge plate comprises a rotatable, longitudinally adjustable substantially cylindrical element mounted within said first aperture means in saidfirst hinge plate.
- abutment means adjustably projectable from the exposed surface of said first hinge plate comprises a generally cylindrical plastic member with thread convolutions impressed in the peripheral surface thereof by internal convolutions defining the said first aperture in said first hinge plate.
- An electrical circuit control hinge device as set forth in claim 1, wherein means is provided for limiting the extent to which said abutment means may be adjustably projected outwardly from said first hinge plate.
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- Computer Security & Cryptography (AREA)
- Hinges (AREA)
Abstract
The present invention relates generally to improvements in door hinge structures equipped with means for controlling an electrical circuit. The present application discloses a pair of hingedly coupled hinge plates or leaves in which one of the hinge plates supports switch means and the other hinge plates supports an adjustably projectable abutment member adapted to engage a complementary shiftable switch controlling member projecting from the other hinge plate. In the disclosed embodiment, the adjustably projectable element comprises an electrically nonconductive generally cylindrical member adapted to be rotated for the purpose of axially shifting said member to position the exposed surface, thereof a predetermined distance from the exposed surface of the hinge plate on which said member is mounted.
Description
United States Patent [191 Foltz [73] Assignee: Lawrence Brothers, Inc., Sterling,
Ill.
221 Filed: Mair. 21, 1913 21 Appl.No.:343,545
[75] Inventor:
[52] US. Cl. ZOO/61.7, ZOO/61.82 [51] Int. Cl. I-I0lh 3/16 [581' Field of Search ZOO/61.64, 61.83, 158; 339/4; 16/128 R, DIG. l4, DIG. 23, DIG. 34, DIG. 39
[56] I References Cited UNITED STATES PATENTS 3,272,935 /1966 Beller et al. ZOO/61.7 3,524,960 8/1970 Lohff 200/158 UX 3,729,603 4/1973 Foltz 339/4 X 2,726,405 12/1955 Smith et al.'.... ZOO/61.7 X 1,902,195 3/1933 vSwahn 339/4 X 1,744,040 l/l930 Elzer 339/4 [451 Apr. 9, 1974 Primary Examiner-James R. Scott Attorney, Agent, or Firm-Olson, Trexler, Wolters, Bushnell & Fosse, Ltd.
[ 5 7 ABSTRACT The present invention relates generally to improvements in door hinge structures equipped with means for controlling an electrical circuit. The present application discloses a pair of hingedly coupled hinge plates or leaves in which one of the hinge plates supports switch means and the other hinge plates supports an adjustably projectable abutment member adapted to engage a complementary shiftable switch controlling member projecting from the other hinge plate. In the disclosed embodiment, the adjustably projectable element comprises an electrically nonconductive generally cylindrical member adapted to be rotated for the purpose of axially shifting said member to position the exposed surface, thereof a predetermined distance from the exposed surface of the hinge plate on which said member is mounted.
8 Claims, 7 Drawing Figures HINGE PLATE SWITCH STRUCTURE SUMMARY OF THE INVENTION In applicants co-pending application for Letters patent, Ser. No. l75,l48, filed Aug. 26, 1971, now U.S. Pat. No. 3,729,603 a hinge structure is disclosed which is of the general type adapted to accommodate the novel feature contemplated by the present invention. In applicants aforesaid pending application, the exposed surface of the hinge plate attached to the door directly engages a shiftable switch controlling element associated with the other hinge plate attached to the door jamb. Variations in the space between the exposed surfaces of hinge plates when in door closing position sometime occur. For example, there is considerable difference in the spacing between leaves on hinges applied to square edged doors as compared with hinges applied to bevelled edged doors when said doors are in closed position. Under such circumstances, unsatisfactory functioning of the switch control mechanism may be experienced. It is, therefore, one of the important objects of the present invention to provide a hinge structure of the general type referred to above equipped with novel means for assuring the proper functioning of the circuit control device despite variations in the spacing of the exposed surfaces of the hinge plates.
More specifically, the present invention contemplates a hinge structure equipped with electrical control means of the general type referred to above, wherein novel, axially or longitudinally abutment means is provided in association with the hinge plate attached to the door member.
Still more specifically, the present invention presents an improved novel arrangement'whereby the extent of projection of a switch actuating member beyond the exposed surface of a hinge plate attached to a door member may be installed and adjusted with a minimum amount of effort and skill.
BRIEF DESCRIPTION OF THE DRAWING The foregoing and other objects and advantages will be more apparent from the following detailed description when considered in connection with the accompanying drawing wherein:
FIG. 1 is afragmentary perspective view of a door and door jamb having in association therewith a novel hinge structure of the type contemplated by the present invention;
FIG. 2 is an enlarged perspective view of the hinge structure shown in FIG. I, more clearly to illustrate the electrical switch device and applicant's novel axially adjustable generally cylindrical abutment means for actuating said switch device;
FIG. 3 is a fragmentary vertical sectional view of the hinge plates of FIG. 2 and the elements. associated therewith as said hinge plates are approaching each other;
FIG. 4 is a fragmentary vertical sectional view similar to FIG. 3 disclosing the above-mentioned hinge plates after the adjustable abutment means carried by one of the plates has been moved into engagement with the switch actuating projection associated with the other hinge plate;
FIG. 5 is a detailed vertical sectional view taken substantially along the line 55 of FIG. 2 more clearly to ating abutment means, a C-ring normally attached to v the abutment member being shown in detached relation thereto.
DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to the drawing more in detail, wherein like numerals have been employed to designate similar parts through the various views it will be observed that a hinge structure representative of one embodiment of the present invention is designated generally by the numeral 10, FIG. 1 and 2. In FIG. 1, the hinge structure 10 is illustrated in operative association with a door member 12 and a door jamb 14. The hinge structure 10 comprises two hinge plates or leaves 16 and 18. The hinge plate l6'is provided with a plurality of screw accommodating apertures 20 to facilitate attachment thereof the vertical edge of the door member 12. Likewise, a hinge plate 18 is provided with a plurality of screw accommodating apertures 22 to facilitate attachment of the hinge plate to the door jamb 14.
An electrical circuit control device or switch mechanism 24 is suitably attached to the rear or unexposed side of the hinge plate 18 as clearly shown in FIG. 2 to 4 inclusive. The circuit control device 24, being secured to the side of the hinge leaf attached directly to the door jamb is lodged within a complementary recess in said jamb. While the control mechanism 24 as disclosed herein is commonly marketed under the trademark Micro-Switch, obviously the present invention is not limited to any specific design of switch mechanism but contemplates the use of various available electrical control devices which may be operated as an incident to the shifting of a shiftable control element such as the element designated by the numeral 26. The control element or button 26 may be shifted from the projected position shown in FIG. 3 to the position shown in FIG. 4 for actuating the switch mechanism 24. Suitable terminal members 28 are adapted to accommodate electrical conductors (not shown). It will be noted that the shiftable switch control or contact member 26 is biased to the left as viewed in FIGS. 3 and 4 through the agency of a leaf spring 30. Thus in order to shift the element 26 from its position of maximum projection beyond the exposed surface of the hinge plate 18 to its retracted position shown in FIG. 4 the force of the leaf spring 30 must be overcome.
As the door member'l2 is moved toward its closed position, a generally cylindrical abutment member 32 is eventually moved into engagement with the shiftable element 26 as clearly shown in FIG. 4. Particular attention is directed to the fact that the abutment member 32 may be axially adjusted within aperture 34 provided in the hinge plate 16 FIG. 3 and 4. The abutment member 32 may be formed from suitable electrical nonconducting material as for example nylon. Material such as nylon affords the resiliency required to maintain the abutment 32 in a fixed position of adjustment. Obviously other suitable material may be used. A tight fit of the abutment 32 within the aperture 34 of the hinge plate 16 serves to secure the abutment in any desired position of projection beyond the exposed surface of the hinge plate 16. A suitable spanner wrench or tool 36 as illustrated in FIG. 7 may be employed to rotate and thereby adjustably control the extent of projection of the exposed extremity of the abutment member 32 beyond the exposed surface of the hinge plate 16. To limit the extent to which the abutment member 32 may be projected beyond the exposed surface of the hinge plate 16, a suitable C-ring 38 may be attached to the shank of the abutment 32 as clearly shown in FIGS. 3 and 4. The C-ring 38 serves to prevent the installer or anyone who may tamper with the abutment 32 from completely backing out said abutment. A head 38a at the opposite extremity prevents the abutment from being urged clear through the hinge plate 16. In instances where desirable, the abutment accommodating aperture 34 of the hinge plate 16 may be threaded so as to accommodate a smooth unthreaded shank of the abutment 32. In such instances, the thread convolutions in the hinge plate 16 will cause corresponding thread convolutions to be indented or impressed within the softer plastic abutment so as to assure a verytight fit which can only be overcome by the application of a suitable turning tool such as the spanner tool 36.
It is important that the degree'of projection of the abutment member 32 beyond the exposed surface of the hinge plate 16 be such that it will properly engage and shift the switch actuating abutment or member 26. By employing applicants novel axially adjustable abutment member 32,each door installation may be adjusted so as to assure the proper functioning of the switch mechanism as an incident to the engagement of the abutment 32 with the switch control member 26 is assured. In FIG. 6 a slightly modified switch mechanism designated generally by the numeral 24a is disclosed. This illustration is incorporated in the drawing merely to illustrate that various modifications of switch mechanisms may be employed to function in cooperation with the abutment 32. A projecting button or switch control element 26a of the switch mechanism 24a is adapted to be engaged by the exposed extremity of the axially adjustable abutment member 32.
While for purposes of disclosure, certain specific structural features representative of the present inventener elements such as screw members for attachment to the verticl edge of a swingable door member and ineluding first aperture means and the second being apertured to accommodate fastener elements such as screw members for attachment in a fixed position upon a vertical door frame and including second aperture means generally aligned with said first aperture means as said hinge plates relatively approach one another, electrical circuit control means mounted on said second hinge plate including a control member projectable through said second aperture means and from the exposed surface of said second hinge plate and shiftable transversely of said second hinge plate, means for connecting said control means with an electrical conductor, electrically non-conductive abutment means adjustably mounted in said first aperture means and projectable from the exposed surface of said first hinge plate in position to engage the exposed surface of the control member projecting from said second hinge plate as an incident to the approach thereto of said first hinge plate, and means for biasing said control member toward the projecting position thereof.
2. An electrical circuit control hinge device as set forth in claim 1, wherein the abutment means adjustably projectable from the exposed surface of said first hinge plate comprises a rotatable, longitudinally adjustable substantially cylindrical element mounted within said first aperture means in saidfirst hinge plate.
3. An electrical circuit control hinge device as set forth in claim 1, wherein said abutment means adjustably projectable from the exposed surface of said first hinge plate comprises a rotatably adjustable impressionable plastic member having the general physical characteristics of nylon.
4. An electrical circuit control hinge device as set forth in claim 1, wherein the abutment means adjustably projectable from the exposed surface of said first hinge plate comprises a generally cylindrical plastic member with thread convolutions impressed in the peripheral surface thereof by internal convolutions defining the said first aperture in said first hinge plate.
5. An electrical circuit control hinge device as set forth in claim 1, wherein means is provided for limiting the extent to which said abutment means may be adjustably projected outwardly from said first hinge plate.
6. An electrical circuit control hinge device as set forth in claim 5', wherein said means for limiting the extent of outward projection of said abutment is in the nature of a C-ring attached thereto.
7. An electrical circuit control hinge device as set forth in claim 1, wherein means is provided for limiting the extent to which the abutment may be moved axi-' ally inwardly with respect to an associated hinge plate.
8. An electrical circuit control hinge device as set forth in claim 7, wherein said means for limiting the inward axial movement of said abutment comprises a head section.
Claims (8)
1. An electrical circuit control hinge device including first and second pivotally connected hinge plates, the first of said plates being apertured to accommodate fastener elements such as screw members for attachment to the vertical edge of a swingable door member and including first aperture means and the second being apertured to accommodate fastener elements such as screw members for attachment in a fixed position upon a vertical door frame and including second aperture means generally aligned with said first aperture means as said hinge plates relatively approach one another, electrical circuit control means mounted on said second hinge plate including a control member projectable through said second aperture means and from the exposed surface of said second hinge plate and shiftable transversely of said second hinge plate, means for connecting said control means with an electrical conductor, electrically non-conductive abutment means adjustably mounted in said first aperture means and projectable from the exposed surface of said first hinge plate in position to engage the exposed surface of the control member projecting from said second hinge plate as an incident to the approach thereto of said first hinge plate, and means for biasing said control member toward the projecting position thereof.
2. An electrIcal circuit control hinge device as set forth in claim 1, wherein the abutment means adjustably projectable from the exposed surface of said first hinge plate comprises a rotatable, longitudinally adjustable substantially cylindrical element mounted within said first aperture means in said first hinge plate.
3. An electrical circuit control hinge device as set forth in claim 1, wherein said abutment means adjustably projectable from the exposed surface of said first hinge plate comprises a rotatably adjustable impressionable plastic member having the general physical characteristics of nylon.
4. An electrical circuit control hinge device as set forth in claim 1, wherein the abutment means adjustably projectable from the exposed surface of said first hinge plate comprises a generally cylindrical plastic member with thread convolutions impressed in the peripheral surface thereof by internal convolutions defining the said first aperture in said first hinge plate.
5. An electrical circuit control hinge device as set forth in claim 1, wherein means is provided for limiting the extent to which said abutment means may be adjustably projected outwardly from said first hinge plate.
6. An electrical circuit control hinge device as set forth in claim 5, wherein said means for limiting the extent of outward projection of said abutment is in the nature of a C-ring attached thereto.
7. An electrical circuit control hinge device as set forth in claim 1, wherein means is provided for limiting the extent to which the abutment may be moved axially inwardly with respect to an associated hinge plate.
8. An electrical circuit control hinge device as set forth in claim 7, wherein said means for limiting the inward axial movement of said abutment comprises a head section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US00343545A US3803375A (en) | 1973-03-21 | 1973-03-21 | Hinge plate switch structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US00343545A US3803375A (en) | 1973-03-21 | 1973-03-21 | Hinge plate switch structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3803375A true US3803375A (en) | 1974-04-09 |
Family
ID=23346555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US00343545A Expired - Lifetime US3803375A (en) | 1973-03-21 | 1973-03-21 | Hinge plate switch structure |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3803375A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4049934A (en) * | 1976-07-30 | 1977-09-20 | Lawrence Brothers Inc. | Security hinge having adjustable cam operator and reciprocable cam follower actuated switch |
| US4066857A (en) * | 1975-07-24 | 1978-01-03 | Stanley Works | Switch activating hinge having reciprocating cam follower switch actuator |
| US4150265A (en) * | 1977-03-14 | 1979-04-17 | Buildex Incorporated | Hinge-activated switch |
| US4168409A (en) * | 1978-08-14 | 1979-09-18 | Lawrence Brothers, Inc. | Security hinge with sealed switch and operator concealed therein |
| USRE30716E (en) * | 1975-07-24 | 1981-08-18 | The Stanley Works | Switch activating hinge having reciprocating cam follower switch actuator |
| US4418636A (en) * | 1981-09-08 | 1983-12-06 | Caterpillar Tractor Co. | Position indicator for a truck body |
| US4444514A (en) * | 1981-10-23 | 1984-04-24 | Lyf Electronics Inc. | Device to permit reproducing or player pianos to serve as musical clocks |
| US6503751B2 (en) | 1996-02-09 | 2003-01-07 | Thermo Forma Inc. | Controlled atmosphere incubator |
| US20030041572A1 (en) * | 2001-08-28 | 2003-03-06 | Thermo Forma Inc. | Incubator having combined HEPA and VOC filter |
| US20050034421A1 (en) * | 2003-08-11 | 2005-02-17 | Che Ting Hsu | Safety catch device of sealing machine |
| US20050045457A1 (en) * | 2003-08-29 | 2005-03-03 | Tae-Ho Park | Door switch actuating structure for refrigerator |
| US20070063586A1 (en) * | 2003-09-11 | 2007-03-22 | Hermann Neidlein | Device for establishing an electrical connection |
| US20070068780A1 (en) * | 2005-09-26 | 2007-03-29 | Bernstein Ag | Switching hinge |
| US20190093403A1 (en) * | 2017-09-28 | 2019-03-28 | Ergomat, Inc. | Gate Supportive, Signal Transmitting Hinge |
-
1973
- 1973-03-21 US US00343545A patent/US3803375A/en not_active Expired - Lifetime
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4066857A (en) * | 1975-07-24 | 1978-01-03 | Stanley Works | Switch activating hinge having reciprocating cam follower switch actuator |
| USRE30716E (en) * | 1975-07-24 | 1981-08-18 | The Stanley Works | Switch activating hinge having reciprocating cam follower switch actuator |
| US4049934A (en) * | 1976-07-30 | 1977-09-20 | Lawrence Brothers Inc. | Security hinge having adjustable cam operator and reciprocable cam follower actuated switch |
| US4150265A (en) * | 1977-03-14 | 1979-04-17 | Buildex Incorporated | Hinge-activated switch |
| US4168409A (en) * | 1978-08-14 | 1979-09-18 | Lawrence Brothers, Inc. | Security hinge with sealed switch and operator concealed therein |
| US4418636A (en) * | 1981-09-08 | 1983-12-06 | Caterpillar Tractor Co. | Position indicator for a truck body |
| US4444514A (en) * | 1981-10-23 | 1984-04-24 | Lyf Electronics Inc. | Device to permit reproducing or player pianos to serve as musical clocks |
| US6503751B2 (en) | 1996-02-09 | 2003-01-07 | Thermo Forma Inc. | Controlled atmosphere incubator |
| US20030041572A1 (en) * | 2001-08-28 | 2003-03-06 | Thermo Forma Inc. | Incubator having combined HEPA and VOC filter |
| US6878177B2 (en) | 2001-08-28 | 2005-04-12 | Thermo Forma, Inc. | Incubator having combined HEPA and VOC filter |
| US6857249B1 (en) * | 2003-08-11 | 2005-02-22 | Che Ting Hsu | Safety catch device of sealing machine |
| US20050034421A1 (en) * | 2003-08-11 | 2005-02-17 | Che Ting Hsu | Safety catch device of sealing machine |
| US20050045457A1 (en) * | 2003-08-29 | 2005-03-03 | Tae-Ho Park | Door switch actuating structure for refrigerator |
| US20070063586A1 (en) * | 2003-09-11 | 2007-03-22 | Hermann Neidlein | Device for establishing an electrical connection |
| US7361855B2 (en) * | 2003-09-11 | 2008-04-22 | Magcode Ag | Device for establishing an electrical connection |
| US20070068780A1 (en) * | 2005-09-26 | 2007-03-29 | Bernstein Ag | Switching hinge |
| US7271358B2 (en) * | 2005-09-26 | 2007-09-18 | Bernstein Ag | Switching hinge |
| US20190093403A1 (en) * | 2017-09-28 | 2019-03-28 | Ergomat, Inc. | Gate Supportive, Signal Transmitting Hinge |
| US11131132B2 (en) * | 2017-09-28 | 2021-09-28 | Ergomat, Inc. | Gate supportive, signal transmitting hinge |
| US20220018172A1 (en) * | 2017-09-28 | 2022-01-20 | Ergomat, Inc. | Gate supportive, signal transmitting hinge |
| US11686137B2 (en) * | 2017-09-28 | 2023-06-27 | Ergomat, Inc | Gate supportive, signal transmitting hinge |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AS | Assignment |
Owner name: LASALLE NATIONAL BANK, ILLINOIS Free format text: LICENSE MORTGAGE;ASSIGNOR:LAWRENCE BROTHERS, INC.;REEL/FRAME:007613/0037 Effective date: 19950725 |