US3873141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door securing apparatus having remotely controlled means to hold its latch bolt in a retracted position
Assignee: C Hager and Sons Hinge Manufacturing Co
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Filing: 1973-11-01
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Granted: 1975-03-25
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Expires: 1993-11-01
Abstract
Abstract An apparatus for securing a door includes a latch bolt which engages the door frame when extended and prevents the door from opening. To release the door the latch bolt is retracted by manually operated operating means, and a dogging mechanism retains the operating means in a position wherein it holds the latch bolt in its retracted position. This enables the door to be opened and closed during periods of high use without operating any of the parts of the apparatus, thus reducing wear and preventing early failure. The dogging mechanism is electrically operated and is controlled from a remote location.
Inventors
- 👤 Francis C Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:09
CPC Classifications
E; E05; E05B; E05B65/00; E05B65/10; E05B65/1046; E05B65/106; E05B65/1066; E05B47/00; E05B65/1093; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0801; Y10T292/0822; Y10T292/0834; Y10T292/0836; Y10T292/0844; Y10T292/0908; Y10T292/096; Y10T292/1014; Y10T292/1022; Y10T292/1031; Y10T292/1043; Y10T292/1075; Y10T292/1083; Y10T292/1092; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5159
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
236 words
An apparatus for securing a door in a structure framing the door, said apparatus comprising a bolt mounted on the door and movable between extended and retracted positions, the bolt when in its extended position being capable of engaging the structure framing the door so as to secure the door in that structure; a movable handle on the door, the handle being normally in a standby position; intermediate operating means interconnecting the handle and the bolt for causing the bolt to move to its retracted position when the handle is moved away from its standby position; a latching dog engageable with the intermediate operating means and movable between latching and release positions, the latching dog when urged to its latching position being capable of engaging the intermediate means each time the intermediate means, as a result of the handle being moved, brings the bolt to its retracted position, the latching dog when engaged with the intermediate means restraining the intermediate means such that the latch bolt remains retracted, whereby the first individual to move the handle away from its standby position when the latching dog is urged to its latching position will cause the latching dog to engage and retain the intermediate means so as to maintain the latch bolt in its retracted position; and electromagnetic means connected with the latching dog for urging the latching dog to and holding it in one of its positions.
Claim 2
Independent Claim
236 words
An apparatus for securing a door in a structure framing the door, said apparatus comprising a bolt mounted on the door and movable between extended and retracted positions, the bolt when in its extended position being capable of engaging the structure framing the door so as to secure the door in that structure; a movable handle on the door, the handle being normally in a standby position; intermediate operating means interconnecting the handle and the bolt for causing the bolt to move to its retracted position when the handle is moved away from its standby position; a latching dog engageable with the intermediate operating means and movable between latching and release positions, the latching dog when urged to its latching position being capable of engaging the intermediate means each time the intermediate means, as a result of the handle being moved, brings the bolt to its retracted position, the latching dog when engaged with the intermediate means restraining the intermediate means such that the latch bolt remains retracted, whereby the first individual to move the handle away from its standby position when the latching dog is urged to its latching position will cause the latching dog to engage and retain the intermediate means so as to maintain the latch bolt in its retracted position; and electromagnetic means connected with the latching dog for urging the latching dog to and holding it in one of its positions.
Claim 3
Independent Claim
227 words
An apparatus for securing a door in a structure framing the door, said apparatus comprising a bolt mounted on the door for engaging the framing structure and securing the door thereto when projected from the door, the bolt being retractable to release the door from the framing structure; a slide carried by the door and movable between first and second positions; means interconnecting the slide and the bolt such that movement of the slide from its first position to its second position will cause the bolt to retract; a spring urging the slide to its first position; a lever pivotally mounted with respect to the door and engaged with the slide such that when the lever is moVed, the slide will move toward its second position against the force exerted by the spring and will retract the latch bolt; a handle on the lever for manually moving the lever; a latching dog pivoted with respect to the door and movable between latching and release positions, the latching dog when urged to its latching position becoming engaged with the slide when the slide is moved to its second position so as to hold the slide in the second position against the force exerted by the spring, whereby the bolt will remain retracted; and electromagnetic means for moving the latching dog to and holding it in its latching position.
Claim 4
Independent Claim
227 words
An apparatus for securing a door in a structure framing the door, said apparatus comprising a bolt mounted on the door for engaging the framing structure and securing the door thereto when projected from the door, the bolt being retractable to release the door from the framing structure; a slide carried by the door and movable between first and second positions; means interconnecting the slide and the bolt such that movement of the slide from its first position to its second position will cause the bolt to retract; a spring urging the slide to its first position; a lever pivotally mounted with respect to the door and engaged with the slide such that when the lever is moVed, the slide will move toward its second position against the force exerted by the spring and will retract the latch bolt; a handle on the lever for manually moving the lever; a latching dog pivoted with respect to the door and movable between latching and release positions, the latching dog when urged to its latching position becoming engaged with the slide when the slide is moved to its second position so as to hold the slide in the second position against the force exerted by the spring, whereby the bolt will remain retracted; and electromagnetic means for moving the latching dog to and holding it in its latching position.
Claim 5
Dependent Claim
28 words
An apparatus according to claim 2 wherein the slide moves vertically with its first position being below its second position, and the lever pivots about a horizontal axis.
Claim 6
Dependent Claim
34 words
An apparatus according to claim 3 wherein the latching dog pivots about a horizontal axis and has at least one projection which extends beneath the slide when the slide is in its latching position.
Claim 7
Independent Claim
282 words
An apparatus for securing a door in a structure framing the door, said apparatus comprising a bolt mounted on the door for engaging the framing structure and securing the door thereto when projected from the door, the bolt being retractable to release the door from the framing structure; a slide carried by the door and movable vertically between upper and lower positions; means interconnecting the slide and the bolt such that movement of the slide from its lower position to its upper position will cause the bolt to retract; a spring urging the slide to its lower position; a lever pivotally mounted with respect to the door for rotational movement about a horizontal axis, the lever projecting away from the door and being engaged with the slide such that when the lever is moved, the slide will move toward its upper position against the force exerted by the spring and will retract the latch bolt; a handle spaced from the door and mounted firmly on the lever such that when the handle is depressed toward the door, the lever will move and will in turn move the slide to its upper position; a latching dog pivoted with respect to the door and movable between engaged and released positions, the latching dog when urged to its latching position while the slide still is in its lower position becoming engaged with the slide when the slide is moved into its upper position so as to hold the slide in the upper position against the force exerted by the spring, whereby the bolt will remain retracted; and electromagnetic means for moving the latching dog from one of its positions to the other of its positions.
Claim 8
Independent Claim
282 words
An apparatus for securing a door in a structure framing the door, said apparatus comprising a bolt mounted on the door for engaging the framing structure and securing the door thereto when projected from the door, the bolt being retractable to release the door from the framing structure; a slide carried by the door and movable vertically between upper and lower positions; means interconnecting the slide and the bolt such that movement of the slide from its lower position to its upper position will cause the bolt to retract; a spring urging the slide to its lower position; a lever pivotally mounted with respect to the door for rotational movement about a horizontal axis, the lever projecting away from the door and being engaged with the slide such that when the lever is moved, the slide will move toward its upper position against the force exerted by the spring and will retract the latch bolt; a handle spaced from the door and mounted firmly on the lever such that when the handle is depressed toward the door, the lever will move and will in turn move the slide to its upper position; a latching dog pivoted with respect to the door and movable between engaged and released positions, the latching dog when urged to its latching position while the slide still is in its lower position becoming engaged with the slide when the slide is moved into its upper position so as to hold the slide in the upper position against the force exerted by the spring, whereby the bolt will remain retracted; and electromagnetic means for moving the latching dog from one of its positions to the other of its positions.
Claim 9
Dependent Claim
20 words
An apparatus according to claim 5 wherein the electromagnetic means when energized urges the latching dog to its engaged position.
Claim 10
Dependent Claim
69 words
A device according to claim 1 wherein the intermediate operating means includes a spring which urges the operating means to the position in which the operating means allows the bolt to assume its extended position; and wherein the electromagnet means when energized urges the latching dog to a position wherein it will engage the operating means and hold the operating means in the position which keeps the bolt retracted.
Claim 11
Dependent Claim
57 words
A device according to claim 7 wherein the intermediate operating means includes a slide which moves in opposition to the spring and a lever arm for operating the slide; and wherein the latching dog engages a surface fixed in position on and movable with the slide when the slide is in a position which compresses the spring.
Claim 12
Dependent Claim
79 words
A device according to claim 8 wherein the slide moves in a vertical direction and is urged downwardly by the spring; and wherein the lever arm has an outwardly exposed portion and pivots about a horizontal axis, the lever arm moving and slide upwardly against the force exerted by the spring when the lever arm is depressed toward the door, and the latching dog being capable holding the slide in the elevated position when the electromagnet means is energized.
Claim 13
Dependent Claim
62 words
A device according to claim 9 wherein the operating means includes another lever arm pivoted about a horizontal axis and spaced laterally across the door from the lever arm which operates the slide, the other lever arm being adjacent to the bolt, and the handle is a cross bar interconnecting the two lever arms so that the lever arms operate in unison.
Claim 14
Dependent Claim
52 words
A device according to claim 1 wherein the latching dog is spring loaded to a position wherein it will engage the operating-means and hold the operating-means in its restraining position; and wherein the electromagnet means when energized urges the latching dog to a position wherein it will not engage the operating means.
Claim 15
Dependent Claim
41 words
A device according to claim 1 wherein the operating means includes means mounted firmly on the bolt and having a surface which extends generally transverse to the direction of movement for the bolt, and wherein the latching dog engages that surface.
Claim 16
Dependent Claim
23 words
A device according to claim 12 wherein the means mounted firmly on the bolt is a tab on the end of the bolt.
Claim 17
Dependent Claim
41 words
A device according to claim 13 wherein the operating means further includes a rotatable spindle and a lever which is pivoted by the spindle when the spindle is rotated, the lever further engaging the tab when pivoted to retract the bolt.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |