US3771823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically controlled hold-open device
Assignee: Schlage Lock Co LLC
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Filing: 1972-02-24
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Granted: 1973-11-13
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Expires: 1992-02-24
Abstract
Abstract An electrically releasable hold-open device for use with a door closing mechanism employing a latch device that engages an element reciprocating in a trackway. The latch device has a pair of arms that are controlled by a solenoid. The solenoid, when energized, operates a wedge to spread the arms. The arms in spread position perform a latching function in cooperation with a cavity on the reciprocating element. The solenoid when deenergized deactivates the latching function.
Inventors
- 👤 R Schnarr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:11
CPC Classifications
E; E05; E05C; E05C17/00; E05C17/02; E05C17/04; E05C17/12; E05C17/24; E05C17/28; E05F; E05F3/00; E05F3/22; E05F3/221; E05F3/222; E05B; E05B47/00; E05F1/00; E05F1/002; E05F1/006; E05F2003/228; E05Y; E05Y2201/00; E05Y2201/40; E05Y2201/46; E05Y2201/462; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132; Y; Y10; Y10T; Y10T292/00; Y10T292/28; Y10T292/289; Y10T292/293
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
143 words
In an electrically controlled door hold-open mechanism for use with a door closing mechanism, the combination comprising, an element mounted for reciprocable movements along a predetermined path during door opening and closing movements, at least one arm member mounted for latching movements with said element when the door is moved to a hold-open position, solenoid means for moving said arm member to latching position when energized, a finger on said arm member adapted to be positioned in the path of and for engagement by said element when said solenoid means is energized, means on said finger for camming the arm to one side when said element is moved to hold-open position, means on said finger for latching said element in hold-open position, switch means in circuit with said electrically energized means for controlling the hold-open position and deactivated position of said arm member.
Claim 2
Dependent Claim
143 words
In an electrically controlled door hold-open mechanism for use with a door closing mechanism, the combination comprising, an element mounted for reciprocable movements along a predetermined path during door opening and closing movements, at least one arm member mounted for latching movements with said element when the door is moved to a hold-open position, solenoid means for moving said arm member to latching position when energized, a finger on said arm member adapted to be positioned in the path of and for engagement by said element when said solenoid means is energized, means on said finger for camming the arm to one side when said element is moved to hold-open position, means on said finger for latching said element in hold-open position, switch means in circuit with said electrically energized means for controlling the hold-open position and deactivated position of said arm member.
Claim 3
Dependent Claim
24 words
The electrically releasable hold-open mechanism defined by claim 1 wherein said arm member is pivoted whereby the finger engages said element in hold-open position.
Claim 4
Dependent Claim
23 words
The electrically releasable hold-open mechanism defined by claim 1 wherein said element has a cavity for engagement by said finger in hold-open position.
Claim 5
Dependent Claim
23 words
The electrically releasable hold-open mechanism defined by claim 3 wherein said finger coacts with a cavity in said element in a hold-open position.
Claim 6
Dependent Claim
104 words
In an electrically controlled door hold-open device, the combination comprising, an element mounted for reciprocating movements along a predetermined path during door opening and closing movements, a cavity in one end of said element, at least one arm member having a finger thereon for entering said cavity when the door is moved to a hold-open position, means for coacting between said finger and said cavity to perform a hold-open function, solenoid means for operating said arm member and for latching said finger in said cavity to perform such door hold-open function, and switch means in circuit with said solenoid for electrically controlling said solenoid.
Claim 7
Dependent Claim
104 words
In an electrically controlled door hold-open device, the combination comprising, an element mounted for reciprocating movements along a predetermined path during door opening and closing movements, a cavity in one end of said element, at least one arm member having a finger thereon for entering said cavity when the door is moved to a hold-open position, means for coacting between said finger and said cavity to perform a hold-open function, solenoid means for operating said arm member and for latching said finger in said cavity to perform such door hold-open function, and switch means in circuit with said solenoid for electrically controlling said solenoid.
Claim 8
Dependent Claim
31 words
The door hold-open device of claim 5 wherein a pair of arms are pivotally mounted with fingers for performing a latching function in cooperation with said cavity in the reciprocating element.
Claim 9
Dependent Claim
109 words
In an electrically controlled hold-open device, the combination comprising, a door closer, a trackway adapted to be secured to a door frame, a reciprocable element mounted for movements in said trackway, arm means connected between said door closer and said reciprocable element, said element having side and end walls, a pair of arm members positioned within said trackway to coact with the end wall of said element, means on said arm members and said element for performing a latching function, said arm members pivoted for movements to latching condition, solenoid means for controlling said arm members, and switch means in circuit with and for controlling energization of said solenoid.
Claim 10
Dependent Claim
109 words
In an electrically controlled hold-open device, the combination comprising, a door closer, a trackway adapted to be secured to a door frame, a reciprocable element mounted for movements in said trackway, arm means connected between said door closer and said reciprocable element, said element having side and end walls, a pair of arm members positioned within said trackway to coact with the end wall of said element, means on said arm members and said element for performing a latching function, said arm members pivoted for movements to latching condition, solenoid means for controlling said arm members, and switch means in circuit with and for controlling energization of said solenoid.
Claim 11
Dependent Claim
31 words
The hold-open device of claim 7 in which said reciprocating element includes a cavity in the end wall for coaction with means on the arm member to perform a latching function.
Claim 12
Dependent Claim
110 words
In an electrically controlled hold-open device, the combination comprising, a door closer, an element mounted for reciprocating movements along a predetermined path during door opening and closing movements, arm means connected between said door closer and said reciprocating element, said reciprocating element is provided with a cavity, a pair of pivoted arm members adapted to be moved relative to each other for latching and unlatching coaction with said element to perform door hold-open and release functions, solenoid means for operating said arm members, said solenoid means when energized spreading said arm members for latching action in said cavity, and switch means in circuit with and for controlling said solenoid means.
Claim 13
Dependent Claim
110 words
In an electrically controlled hold-open device, the combination comprising, a door closer, an element mounted for reciprocating movements along a predetermined path during door opening and closing movements, arm means connected between said door closer and said reciprocating element, said reciprocating element is provided with a cavity, a pair of pivoted arm members adapted to be moved relative to each other for latching and unlatching coaction with said element to perform door hold-open and release functions, solenoid means for operating said arm members, said solenoid means when energized spreading said arm members for latching action in said cavity, and switch means in circuit with and for controlling said solenoid means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |