Patent US4358758A successfully refreshed from Google Patents.
US4358758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door locking alarm device
Assignee: Individual
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Filing: 1981-03-16
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Granted: 1982-11-09
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Expires: 2001-03-16
Abstract
Abstract A combination door lock and alarm has an upper end clip engageable with the door handle, a shaft extending in an adjustable length tube and terminating in a non-skid rubber end adapted to engage the floor or carpet. The clip at the upper end of the shaft is angularly mounted and has its lower end lying in a plane substantially aligned with the longitudinal axis of the shaft. An alarm device is also mounted on the shaft and includes an actuator for it with a switch contact normally abutting or close to abutment with the surface of the door at a point below the door handle. Responsive to inward movement and pressure on the door the alarm will be actuated. At the same time, the locking action of the shaft and clip will divert the opening inward forces into forces directed against the floor so that the door cannot be opened.
Inventors
- 👤 David C. Morton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:51
CPC Classifications
E; E05; E05C; E05C19/00; E05C19/003; E05C19/004; E05B; E05B45/00; E05B45/06; Y; Y10; Y10T; Y10T292/00; Y10T292/65; Y10T292/67
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
101 words
A door locking and alarm device for portable use and ready installation on a door handle comprising: an adjustable length shaft portion; a non-skid end portion mounted on the lower end of the shaft portion; a door handle engaging clip fixed to the upper end of said shaft portion and mounted on it substantially aligned to its longitudinal axis; and an alarm device mounted on said shaft portion and having an actuator therefor in abutment with the inner surface to the door when the device is in use for providing an alarm responsive to a limited movement of the door inwardly.
Claim 2
Dependent Claim
101 words
A door locking and alarm device for portable use and ready installation on a door handle comprising: an adjustable length shaft portion; a non-skid end portion mounted on the lower end of the shaft portion; a door handle engaging clip fixed to the upper end of said shaft portion and mounted on it substantially aligned to its longitudinal axis; and an alarm device mounted on said shaft portion and having an actuator therefor in abutment with the inner surface to the door when the device is in use for providing an alarm responsive to a limited movement of the door inwardly.
Claim 3
Dependent Claim
40 words
The combination as set forth in claim 1 wherein said adjustable length shaft portion includes inner and outer telescoping sleeve portions and a plunger adjustably registerable with one of a plurality of holes longitudinally arranged in said outer sleeve portion.
Claim 4
Dependent Claim
45 words
The combination as set forth in claim 1 wherein said alarm device is of the electrically operated, audible type and said actuator comprises a movable contact mounted proximate the upper end of said shaft and normally in engagement with the inner surface of the door.
Claim 5
Dependent Claim
41 words
The combination as set forth in claim 1 wherein a swiveling mounting means is included intermediate said clip and the upper end of said shaft to permit its being pivoted and stored in an inactive position against the inner door surface.
Claim 6
Dependent Claim
25 words
The combination as set forth in claim 1 wherein said alarm device is of the electrically operable type having its own electrical power source included.
Claim 7
Dependent Claim
20 words
The combination as set forth in claim 5 wherein said alarm device actuator comprises a normally open contact and switch.
Claim 8
Dependent Claim
24 words
The combination as set forth in claim 1 wherein said clip is operable to engage the shaft associated with a knob of said handle.
Claim 9
Dependent Claim
105 words
A door locking device for portable use and ready installation on a door knob and door knob shaft, comprising: an adjustable length shaft portion; a nonskid end portion mounted on the lower end of said shaft portion; a rigid clip having resilient free end portions engagable about said door knob shaft; said clip having a base portion connected to the upper end of said shaft portion and in substantial alignment with the longitudinal axis of said shaft, said clip base portion pivotally connected to the upper end of said shaft portion to allow storage of said device against the door surface in an inactive position.
Claim 10
Dependent Claim
105 words
A door locking device for portable use and ready installation on a door knob and door knob shaft, comprising: an adjustable length shaft portion; a nonskid end portion mounted on the lower end of said shaft portion; a rigid clip having resilient free end portions engagable about said door knob shaft; said clip having a base portion connected to the upper end of said shaft portion and in substantial alignment with the longitudinal axis of said shaft, said clip base portion pivotally connected to the upper end of said shaft portion to allow storage of said device against the door surface in an inactive position.
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) | 1985-11-08 | 1986-05-10 | 1986-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-08 | 1990-05-10 | 1990-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-08 | 1994-05-10 | 1994-11-09 | $7700.00 | Window Closed / Lapsed |