US3900795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Installation and test tool for ionization smoke detector
Assignee: Honeywell Inc
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Filing: 1973-08-15
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Granted: 1975-08-19
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Expires: 1993-08-15
Abstract
Abstract In the present invention a ceiling mounted smoke detector assembly has a permanently mounted ceiling fixture portion and a detachably mounted smoke detector head adapted for mounting to the fixture portion. To provide for ease of installation, removal, and/or testing of the smoke detector head or of testing the entire assembly there is an installation and testing tool which mechanically and electrically interlocks with the smoke detector head.
Inventors
- 👤 Larry D Larsen
- 👤 Lee Schuck
- 👤 Joseph C Pekarek
- 👤 Richard C Mott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:54
CPC Classifications
G; G08; G08B; G08B17/00; G08B17/10; G08B17/11; G08B17/113; G08B29/00; G08B29/12; G08B29/14; G08B29/145
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
193 words
In a smoke detector system an installing and testing tool mechanically and electrically cooperating and interlocking with a smoke detector device, the system comprising in combination: a smoke detector device having a permanently mounted overhead fixture portion with a plurality of electrical contacts which are adapted to be wired to a central station, and said device having a detachably mounted smoked sensor portion adapted for mounting to said fixture portion, said smoke sensor portion including a plurality of electrical contacts positioned to match with the contacts of the fixture portion, said smoke sensor portion having a pair of tabs with electrical test terminals thereon, said tabs being adapted to engage and be grasped by an installing and testing tool; an installing and testing tool for said smoke sensor portion, said tool having tab engaging and grasping means, said last named means including test probe finger means positioned to make contact with said electrical test terminals on said tabs when said tabs are engaged and grasped by said tool, and said tool having extended handle means which is rotationally operative to cause said tab engaging and grasping means to grasp and release said tabs.
Claim 2
Dependent Claim
193 words
In a smoke detector system an installing and testing tool mechanically and electrically cooperating and interlocking with a smoke detector device, the system comprising in combination: a smoke detector device having a permanently mounted overhead fixture portion with a plurality of electrical contacts which are adapted to be wired to a central station, and said device having a detachably mounted smoked sensor portion adapted for mounting to said fixture portion, said smoke sensor portion including a plurality of electrical contacts positioned to match with the contacts of the fixture portion, said smoke sensor portion having a pair of tabs with electrical test terminals thereon, said tabs being adapted to engage and be grasped by an installing and testing tool; an installing and testing tool for said smoke sensor portion, said tool having tab engaging and grasping means, said last named means including test probe finger means positioned to make contact with said electrical test terminals on said tabs when said tabs are engaged and grasped by said tool, and said tool having extended handle means which is rotationally operative to cause said tab engaging and grasping means to grasp and release said tabs.
Claim 3
Dependent Claim
42 words
The invention according to claim 1 and further comprising: said tool including an electrical source for energizing said smoke sensor portion by wAy of said electrical test terminals, said tool and smoke sensor portion providing an independently operative and portable smoke sensor.
Claim 4
Dependent Claim
27 words
The invention according to claim 1 and further comprising: said tool having meter means and circuit means connecting said meter means to said test probe finger means.
Claim 5
Dependent Claim
28 words
The invention of claim 1 wherein said smoke sensor tabs are a portion of a printed circuit board on which board the electronic circuit of the smoke sensor.
Claim 6
Dependent Claim
29 words
The invention of claim 1 wherein said tool tab engaging and grasping means further includes a pair of L-shaped extended fingers adapted to reach behind said smoke sensor tabs.
Claim 7
Dependent Claim
90 words
The invention according to claim 1 wherein the smoke detector device further comprises insert-and-rotate-to-lock bayonet type fastening means on said two device portions for mounting and securing said smoke sensor portion to said fixture portion, said fastening means having no spring loading during insertion to present no resistance to insertion; and wherein at least a portion of the electrical contacts of said smoke detector device are resilient and provide a spring loading on one device portion relative to the other upon rotation-to-lock said smoke sensor portion to said fixture portion.
Claim 8
Dependent Claim
139 words
An installing and testing tool for use with a detachably mounted smoke detector device, the tool comprising in combination: base member means including thereon a plurality of extended smoke detector device engaging fingers and test probe finger means cooperating with said extended engaging fingers, the engaging fingers and the test probe finger means being adjustable one relative to the other and adapted for engaging and interlocking with tabs of a smoke detector device; and, handle means rotatably mounted to said base member means, and cam means connected to said handle means and positioned together with said base member means and rotatable by said handle means to cause said test probe finger means and said smoke detector engaging fingers to move one relative to the other when said handle means is being rotated with respect to said base member means.
Claim 9
Dependent Claim
139 words
An installing and testing tool for use with a detachably mounted smoke detector device, the tool comprising in combination: base member means including thereon a plurality of extended smoke detector device engaging fingers and test probe finger means cooperating with said extended engaging fingers, the engaging fingers and the test probe finger means being adjustable one relative to the other and adapted for engaging and interlocking with tabs of a smoke detector device; and, handle means rotatably mounted to said base member means, and cam means connected to said handle means and positioned together with said base member means and rotatable by said handle means to cause said test probe finger means and said smoke detector engaging fingers to move one relative to the other when said handle means is being rotated with respect to said base member means.
Claim 10
Dependent Claim
33 words
The invention of claim 7 wherein said test probe finger means provide electrical contact from test points on the tabs of a smoke detector device through a multiconductor cable to a test set.
Claim 11
Dependent Claim
37 words
The invention of claim 7 and further comprising: battery powered Test set means including multiconductor cable means eletrically connected to said test probe finger means so that operational tests can be made on a smoke detector device.
Claim 12
Independent Claim
173 words
A method of installing and testing smoke detector heads into ceiling fixtures using an installation and testing tool comprising the steps of: inserting smoke detector tab grasping means of an installation and testing tool into a smoke detector head and rotating said tool in a first direction until the tab grasping means contact the smoke detector tabs; rotating further in the first direction the handle of the tool with respect to the smoke detector head to lock together the tool and smoke detector head; inserting the tool mounted smoke detector head into ceiling fixture; rotating the tool and smoke detector head in the first direction to lock the smoke detector head into the ceiling fixture; rotating still further in the first direction the handle of the tool with respect to the now installed smoke detector head to unlock the tool from the smoke detector head; rotating tool in the opposite direction until the tab grasping means are clear of the smoke detector tabs and withdrawing the tool from the installed smoke detector head.
Claim 13
Independent Claim
173 words
A method of installing and testing smoke detector heads into ceiling fixtures using an installation and testing tool comprising the steps of: inserting smoke detector tab grasping means of an installation and testing tool into a smoke detector head and rotating said tool in a first direction until the tab grasping means contact the smoke detector tabs; rotating further in the first direction the handle of the tool with respect to the smoke detector head to lock together the tool and smoke detector head; inserting the tool mounted smoke detector head into ceiling fixture; rotating the tool and smoke detector head in the first direction to lock the smoke detector head into the ceiling fixture; rotating still further in the first direction the handle of the tool with respect to the now installed smoke detector head to unlock the tool from the smoke detector head; rotating tool in the opposite direction until the tab grasping means are clear of the smoke detector tabs and withdrawing the tool from the installed smoke detector head.
Claim 14
Dependent Claim
190 words
In a smoke detector system an installing and testing tool mechanically and electrically cooperating and interlocking with a smoke detector device having a permanently mounted overhead fixture portion with a plurality of electrical contacts which are adapted to be wired to a central station, and said device having a detachably mounted smoke sensor portion adapted for mOunting to said fixture portion, said smoke sensor portion including a plurality of electrical contacts positioned to match with the contacts of the fixture portion, said smoke sensor portion having a pair of tabs with electrical test terminals thereon, said tabs being adapted to engage and be grasped by an installing and testing tool; the installing and testing tool comprising: an installing and testing tool for said smoke sensor portion, said tool having tab engaging and grasping means, said last named means including test probe finger means positioned to make contact with said electrical test terminals on said tabs when said tabs are engaged and grasped by said tool, and said tool having extended handle means which is rotationally operative to cause said tab engaging and grasping means to grasp and release said tabs.
Claim 15
Dependent Claim
190 words
In a smoke detector system an installing and testing tool mechanically and electrically cooperating and interlocking with a smoke detector device having a permanently mounted overhead fixture portion with a plurality of electrical contacts which are adapted to be wired to a central station, and said device having a detachably mounted smoke sensor portion adapted for mOunting to said fixture portion, said smoke sensor portion including a plurality of electrical contacts positioned to match with the contacts of the fixture portion, said smoke sensor portion having a pair of tabs with electrical test terminals thereon, said tabs being adapted to engage and be grasped by an installing and testing tool; the installing and testing tool comprising: an installing and testing tool for said smoke sensor portion, said tool having tab engaging and grasping means, said last named means including test probe finger means positioned to make contact with said electrical test terminals on said tabs when said tabs are engaged and grasped by said tool, and said tool having extended handle means which is rotationally operative to cause said tab engaging and grasping means to grasp and release said tabs.
Claim 16
Dependent Claim
26 words
The method of claim 10 and comprising the additional step of: testing said smoke detector head while said tool and smoke detector head are locked together.
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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |