Patent US4725818A successfully refreshed from Google Patents.
US4725818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Walk through test system
Assignee: ADT Services GmbH
•
Filing: 1985-09-13
•
Granted: 1988-02-16
•
Expires: 2005-09-13
Abstract
Abstract Walk through test system for testing devices such as pull stations, smoke detectors, alarm bells and the like for alarm and trouble conditions without the assistance of a central panel operator. The devices are connected in a loop or loops distributed throughout one or more zones remote from a central panel. Alarm and trouble conditions are detected at the central panel. When a device is placed in alarm by the workman, a coded alarm is sounded which is aurally detectable by the workman at the location of the device, remote from the central panel. The coded alarm identifies the zone loop in which the device is connected. When a trouble condition is created in a loop by the workman, an alarm is sounded which is aurally detectable at the location of the loop, remote from the central panel. The alarm is coded to indicate to the workman that a trouble condition has been detected at the central panel. A device which has been placed in alarm is automatically reset by the central panel after the coded alarm has been sounded, so that the next device can be tested.
Inventors
- 👤 Charles J. Motyka
- 👤 Lawrence Kaplan
- 👤 Henry F. Harrington
- 👤 Rudolph B. Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:38
CPC Classifications
G; G08; G08B; G08B29/00; G08B29/12; G08B29/14; G08B25/00; G08B25/01; G08B25/018
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
88 words
Method of testing devices distributed throughout one or more zone loops remote from a central panel, comprising: monitoring said devices in a test mode for an alarm condition, placing at least one of said devices in an alarm condition, detecting the alarm condition at the central panel and automatically sounding an audible on/off code which is aurally detectable at the location of the device placed in said alarm condition, said audible on/off code identifying the zone loop in which the device placed in said alarm condition is connected.
Claim 2
Dependent Claim
88 words
Method of testing devices distributed throughout one or more zone loops remote from a central panel, comprising: monitoring said devices in a test mode for an alarm condition, placing at least one of said devices in an alarm condition, detecting the alarm condition at the central panel and automatically sounding an audible on/off code which is aurally detectable at the location of the device placed in said alarm condition, said audible on/off code identifying the zone loop in which the device placed in said alarm condition is connected.
Claim 3
Dependent Claim
128 words
Method of testing devices distributed throughout one or more zone loops remote from a central panel, comprising: monitoring said devices in a test mode for an alarm condition and a trouble condition, placing at least one of said devices in an alarm condition, detecting the alarm condition at the central panel and automatically sounding an audible on/off code which is aurally detectable at the location of the device placed in said alarm condition, said audible on/off code identifying the zone loop in which the device placed in said alarm condition is connected, creating a trouble condition in a zone loop, and detecting the trouble condition at the central panel and automatically sounding an audible alarm which is aurally detectable at the location of said last mentioned zone loop.
Claim 4
Dependent Claim
128 words
Method of testing devices distributed throughout one or more zone loops remote from a central panel, comprising: monitoring said devices in a test mode for an alarm condition and a trouble condition, placing at least one of said devices in an alarm condition, detecting the alarm condition at the central panel and automatically sounding an audible on/off code which is aurally detectable at the location of the device placed in said alarm condition, said audible on/off code identifying the zone loop in which the device placed in said alarm condition is connected, creating a trouble condition in a zone loop, and detecting the trouble condition at the central panel and automatically sounding an audible alarm which is aurally detectable at the location of said last mentioned zone loop.
Claim 5
Dependent Claim
28 words
Method according to claims 1 or 2 including the step of automatically resetting the device placed in said alarm condition after said audible on/off code has been sounded.
Claim 6
Dependent Claim
100 words
Apparatus for testing devices distributed throughout one or more zone loops remote from a central panel, comprising: means at the central panel for monitoring each of said devices in a test mode for an alarm condition, sounding means for sounding an alarm which is aurally detectable at the location of each of said zone loops, and means at the central panel for detecting a device in an alarm condition and for automatically causing said sounding means to sound an alarm which is coded so as to identify the zone loop in which said device in said alarm condition is connected.
Claim 7
Dependent Claim
100 words
Apparatus for testing devices distributed throughout one or more zone loops remote from a central panel, comprising: means at the central panel for monitoring each of said devices in a test mode for an alarm condition, sounding means for sounding an alarm which is aurally detectable at the location of each of said zone loops, and means at the central panel for detecting a device in an alarm condition and for automatically causing said sounding means to sound an alarm which is coded so as to identify the zone loop in which said device in said alarm condition is connected.
Claim 8
Dependent Claim
135 words
Apparatus for testing devices distributed throughout one or more zone loops remote from a central panel, comprising: means at the central panel for monitoring each of said devices in a test mode for an alarm condition, sounding means for sounding an alarm which is aurally detectable at the location of each of said zone loops, means at the central panel for detecting a device in an alarm condition and for automatically causing said sounding means to sound an alarm which is coded so as to identify the zone loop in which said device in said alarm condition is connected, and means at the central panel for detecting a trouble condition in a zone loop and for automatically causing said sounding means to sound an alarm which is coded to indicate detection of a trouble condition.
Claim 9
Dependent Claim
135 words
Apparatus for testing devices distributed throughout one or more zone loops remote from a central panel, comprising: means at the central panel for monitoring each of said devices in a test mode for an alarm condition, sounding means for sounding an alarm which is aurally detectable at the location of each of said zone loops, means at the central panel for detecting a device in an alarm condition and for automatically causing said sounding means to sound an alarm which is coded so as to identify the zone loop in which said device in said alarm condition is connected, and means at the central panel for detecting a trouble condition in a zone loop and for automatically causing said sounding means to sound an alarm which is coded to indicate detection of a trouble condition.
Claim 10
Dependent Claim
24 words
Apparatus according to claims 4 or 5 wherein said alarm which is coded to identify the zone loop is coded in an on/off code.
Claim 11
Dependent Claim
38 words
Apparatus according to claims 4 or 5 including means at said central panel for automatically resetting said device in said alarm condition after said coded alarm which identifies said zone loop has been sounded by said sounding means.
Claim 12
Dependent Claim
55 words
Apparatus according to claim 5 wherein said sounding means includes plural bells connected in a loop, and said means for detecting a trouble condition includes means for detecting a trouble condition in the bell loop and for automatically causing said sounding means to sound said alarm which indicates detection of a trouble condition in response.
Claim 13
Dependent Claim
33 words
Apparatus according to claims 5 or 8 wherein said alarm which is coded to indicate detection of said trouble condition is sounded continuously by said sounding means over a preset interval of time.
References Cited (Backward Citations)
US276708A
Cited
US277836A
Cited
US3231879A
Cited
US3252156A
Cited
US3422252A
Cited
US3448447A
Cited
US3452345A
Cited
US3562730A
Cited
US3570446A
Cited
US3623087A
Cited
US3611362A
Cited
US3552350A
Cited
US3717862A
Cited
US3619728A
Cited
US3627993A
Cited
US3665462A
Cited
US3968182A
Cited
US3821733A
Cited
US3919528A
Cited
US3886534A
Cited
US3848241A
Cited
US3927404A
Cited
US3938118A
Cited
US4044351A
Cited
US3928849A
Cited
US3955183A
Cited
US3930246A
Cited
US4064507A
Cited
US4032909A
Cited
US4117479A
Cited
US4141006A
Cited
US4201982A
Cited
US4095212A
Cited
US4151514A
Cited
US4321592A
Cited
US4322631A
Cited
US4412750A
Cited
US4245296A
Cited
US4323890A
Cited
US4274087A
Cited
US4257035A
Cited
US4286208A
Cited
US4467423A
Cited
US4270121A
Cited
US4349812A
Cited
US4342985A
Cited
US4345459A
Cited
US4361031A
Cited
US4384477A
Cited
US4498074A
Cited
US4370566A
Cited
US4370566B1
Cited
US4489312A
Cited
US4406995A
Cited
US4517554A
Cited
US4412211A
Cited
US4400685A
Cited
US4398168A
Cited
US4481502A
Cited
US4498075A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-15 | 1991-08-17 | 1992-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-15 | 1995-08-17 | 1996-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-15 | 1999-08-17 | 2000-02-16 | $7700.00 | Window Closed / Lapsed |