Patent US3768087A successfully refreshed from Google Patents.
US3768087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intrusion detecting alarm system
Assignee: Duracell Inc USA
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Filing: 1972-06-23
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Granted: 1973-10-23
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Expires: 1992-06-23
Abstract
Abstract An intrusion alarm including a vibrator, an energizing battery, and a switch controllable by an intrusion detector element to connect the battery to the vibrator, all mounted on a frame to be mounted on a vibratable panel, such as a door or window pane.
Inventors
- 👤 G Kaye
- 👤 G Sussingham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:14
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/02; G08B13/08
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
206 words
A signalling system, suitable for use as an intrusion alarm, comprising: a sound producer including a vibrating element; a supporting frame structure having a high coefficient of transmission of audible frequencies, and serving to support said vibrating element; means for attaching said frame structure to an external panel for amplifying the sound of said vibrating element; a battery-operable device for energizing said vibrating element; a battery; a switch operable to connect said battery to said device and to disconnect said battery from said device, said switch including a stationary contact; a movable contact supported on a cantilever springblade; and means for adjustably positioning said movable contact to selectively control said switch to function or not to function under predetermined conditions, said adjustable positioning means including a push pin supported for and capable of rotation and axially reciprocatable movement and mechanically coupled to said movable contact against the resisting spriNg force of said spring blade, a handle to rotate and axially move said push pin, and a detent to hold said pin in a forward position against the spring action of said spring blade; and means responsive to an intrusion attempt for controlling the switch to connect the battery to the device for energizing said sound producer.
Claim 2
Dependent Claim
206 words
A signalling system, suitable for use as an intrusion alarm, comprising: a sound producer including a vibrating element; a supporting frame structure having a high coefficient of transmission of audible frequencies, and serving to support said vibrating element; means for attaching said frame structure to an external panel for amplifying the sound of said vibrating element; a battery-operable device for energizing said vibrating element; a battery; a switch operable to connect said battery to said device and to disconnect said battery from said device, said switch including a stationary contact; a movable contact supported on a cantilever springblade; and means for adjustably positioning said movable contact to selectively control said switch to function or not to function under predetermined conditions, said adjustable positioning means including a push pin supported for and capable of rotation and axially reciprocatable movement and mechanically coupled to said movable contact against the resisting spriNg force of said spring blade, a handle to rotate and axially move said push pin, and a detent to hold said pin in a forward position against the spring action of said spring blade; and means responsive to an intrusion attempt for controlling the switch to connect the battery to the device for energizing said sound producer.
Claim 3
Dependent Claim
129 words
A signalling system, as in claim 1, including additionally, an elongated metallic supporting frame; an electromagnet coil having a core, with its core supported on the upper end of said frame, and positioned to point the open end of the core away from said frame; an armature cantilever-supported by a reed and disposed to be attracted by said open end of said core; a back contact normally engaged by said armature reed as a switch to establish a circuit to the electromagnet coil, said back contact switch being opened by attracted movement of the armature toward said core to open the coil circuit to cause the armature to function as a vibrating switch; and means connecting said battery in a circuit including said vibrating switch and said electromagnet coil.
Claim 4
Dependent Claim
35 words
A signalling system, as in claim 2, in which said frame and said reed and armature are of magnetic material to provide a magnetic path of low reluctance for the magnetic flux of the coil.
Claim 5
Dependent Claim
86 words
A signalling system, as in claim 3, in which said frame is shaped, in part, to constitute an L, as two contiguous sides of a virtual rectangle, with the armature and said reed disposed to constitute an equivalent opposite long side of said virtual rectangle and said core of the coil disposed with its air gap to said armature to constitute an equivalent opposite short side of said virtual rectangle, whereby said virtual rectangle defines the path of the magnetic flux developed by said electromagnet coil.
Claim 6
Dependent Claim
27 words
A signalling system, as in claim 4, in which said elements disposed along said virtual rectangular path are of high permeability to be good magnetic flux conductors.
Claim 7
Dependent Claim
37 words
A signalling system, as in claim 2, in which said frame, said core, said cantilever reed, and the air-gap between the core and said armature, define a magnetic path for the magnetic flux of the electromagnet coil.
Claim 8
Dependent Claim
156 words
A cell mounting, as a sub-combination of the system in claim 1, comprising: a support; a housing, consisting of a hollow box receptacle with back, side and end walls, and open at the front, mounted on said support; an elongated cradle for a battery cell, to fit into said hollow box, and including; a hollow frame structure having elongated forward and back walls, and two top and bottom end walls, with open sides to permit insertion and removal of a battery cell, and having a narrow elongated forwardly disposed handle for said cradle, the width of inner spacing between said front and back walls being such as to permit a snug sliding fit for an intended electric cell; and two resilient leaf spring terminals supported on the receptacle box end walls, to be engaged by the polar terminals of the electric cell in said cradle with a rubbing action, as the cell is inserted or removed.
Claim 9
Dependent Claim
123 words
A cell mounting, as in claim 7, in which each of said resilient leaf-spring terminals is supported on one or the other end wall of said hollow box receptacle, and has a resilient spring blade directed inwardly into said hollow box receptacle, and extends downward into the path of an end terminal of a cell to be inserted into said elongated cradle; and said cradle is shaped with a horizontal slot in each of its top and bottom end walls to provide a free space for each such associated resilient spring blade to extend into and through said horizontal slot and into said path of the related end terminal of a cell being inserted by said elongated cradle into said hollow housing receptacle.
Claim 10
Dependent Claim
144 words
A cell mounting, as in claim 8, in which each end wall, top and bottom, is provided with said horizontal slot to permit access movement of each said rElated spring blade to engage a terminal end of a cell in said cradle, and said forward wall of said cradle is provided at each end, with a vertical slot on said forward wall as a continuation from the inner end of said horizontal slot and extending inwardly in said forward wall to provide an open space for free removal of the cradle past the free end of each cantilevered spring blade, in case the cradle may have been inserted without a cell therein, which condition would have permitted each blade to extend axially into the carriage to block removal of the carriage in the absence of said slot into the forward wall of the carriage.
Claim 11
Dependent Claim
97 words
A cradle as an element of the sub-combination in claim 7, comprising an elongated rectangular frame including a forward long wall, a rearward long wall, and top and bottom end walls, with the framed space between the long walls fully accessible from either side to press an elongated electric cell into or out of said frame, a front-to-back slot in each top and bottom end wall to provide access space for an external contact to engage an end terminal of either electrode of the cell; and a handle on the rearward long wall for manipulating the cradle.
Claim 12
Dependent Claim
51 words
A system, as in claim 1, in which said system is applied to a door leading to an area to be safeguarded, and in which said means for adjustably positioning said movable contact may be operated to lock said contact in open switch condition when the intrusion signal is not desired.
Claim 13
Dependent Claim
89 words
A system, as in claim 1, in which a sleeve element is mounted on said frame as a stationary support and guide for said push pin, and said sleeve element has a deep slot lengthwise in its wall, and a shallow slot in its end edge disposed transversely to said deep slot; and a guide on said pin is movable in said deep slot to permit free movement of said pin to switch-closing position when the system is set to function in response to an intrusion or unauthorized entry.
Claim 14
Dependent Claim
30 words
A system, as in claim 12, in which said pin is provided with a detent movable to said shallow slot to prevent free movement of said pin to switch-closing position.
Claim 15
Dependent Claim
22 words
A system, as in claim 13, in which said guide and said detent are combined as a unit element on said pin.
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |