Entry alarm
First Claim
1. In self contained battery operated alarm apparatus of the type using audible alarm means and a trip switch which when closed will sound the alarm, arranged such that the alarm apparatus can be located and oriented on a door such as to close the trip switch when the door is ajar, the improvement comprising:
- a) arm-disarm circuit means controlling an arm-disarm circuit arranged such that when said arm-disarm circuit means is energized said arm-disarm circuit is open and when said arm-disarm circuit means is deenergized said arm-disarm circuit is closed; and
having first interconnecting circuitry connecting said arm-disarm circuit to said alarm apparatus such that when said arm-disarm circuit is open the alarm is prevented from sounding;
b) an arm-disarm box containing said arm-disarm circuit means, having attachment means arranged to attach said arm-disarm box to a door on the side opposite the alarm apparatus;
said arm-disarm box having a slot of a predetermined depth extending inwardly from a slot opening of a predetermined size and shape in the surface thereof;
c) battery means and an arm-disarm switch having a spring loaded switch arm extending therefrom with a normally open first position and a closed second position, said battery means and said arm-disarm switch being connected such as to energize said arm-disarm circuit means whenever said arm-disarm switch is closed, and having an insert with a first and second dimension with a size and shape such that said first and second dimensions will mate with and fit within the slot opening, and with a third dimension greater than said slot depth such that said insert can be inserted into said slot to the bottom thereof with a predetermined amount of said insert extending outwardly therefrom;
said arm-disarm switch being located and oriented within said arm-disarm box relative to said slot such that when said insert is inserted to the bottom of said slot, said arm of said arm-disarm switch will be forced by said insert from the first to the second position.
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Accused Products
Abstract
A self contained alarm is arranged to be attached to a door or near a building opening. One version uses a spring loaded switch held open by a door frame, which closes and sounds an audible alarm when the door is opened. A relay with normally open contacts is energized with the alarm to maintain the alarm until a reset switch is opened by a card or key inserted into a mating slot. Another version uses a rotary trip switch which is operated by a line. The line is placed across a building opening to be guarded and closes the rotary switch if the line is disturbed. A second embodiment uses an arm-disarm switch also operated by a card or key inserted into a mating slot to control a second relay. This arm-disarm switch is placed in a second box on the outside of a door to be guarded to permit arming the alarm after the door is closed. Here contacts of the second relay keep the alarm circuit open until the card or key is withdrawn to provide an arm-disarm function.
42 Citations
17 Claims
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1. In self contained battery operated alarm apparatus of the type using audible alarm means and a trip switch which when closed will sound the alarm, arranged such that the alarm apparatus can be located and oriented on a door such as to close the trip switch when the door is ajar, the improvement comprising:
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a) arm-disarm circuit means controlling an arm-disarm circuit arranged such that when said arm-disarm circuit means is energized said arm-disarm circuit is open and when said arm-disarm circuit means is deenergized said arm-disarm circuit is closed; and
having first interconnecting circuitry connecting said arm-disarm circuit to said alarm apparatus such that when said arm-disarm circuit is open the alarm is prevented from sounding;b) an arm-disarm box containing said arm-disarm circuit means, having attachment means arranged to attach said arm-disarm box to a door on the side opposite the alarm apparatus;
said arm-disarm box having a slot of a predetermined depth extending inwardly from a slot opening of a predetermined size and shape in the surface thereof;c) battery means and an arm-disarm switch having a spring loaded switch arm extending therefrom with a normally open first position and a closed second position, said battery means and said arm-disarm switch being connected such as to energize said arm-disarm circuit means whenever said arm-disarm switch is closed, and having an insert with a first and second dimension with a size and shape such that said first and second dimensions will mate with and fit within the slot opening, and with a third dimension greater than said slot depth such that said insert can be inserted into said slot to the bottom thereof with a predetermined amount of said insert extending outwardly therefrom;
said arm-disarm switch being located and oriented within said arm-disarm box relative to said slot such that when said insert is inserted to the bottom of said slot, said arm of said arm-disarm switch will be forced by said insert from the first to the second position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. In self contained battery operated alarm apparatus of the type using audible alarm means and a trip switch which when closed will sound the alarm, arranged such that the alarm apparatus can be located and oriented on a door such as to close the tip switch when the door is ajar, said alarm apparatus having holding circuit means for controlling a holding circuit, said holding circuit means comprised of a relay having a coil, and wherein said holding circuit comprises a set of contacts of said relay, said contacts being closed when said coil is energized and open when said coil is deenergized, said relay being connected to said alarm apparatus such as to be energized whenever the alarm is sounded, said set of contacts of said relay being connected to the alarm apparatus such as to sound said alarm whenever said set of relay contacts are closed, the improvement comprising:
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a) an alarm box arranged to contain the alarm apparatus, said alarm box having a slot of a predetermined depth extending inwardly from a slot opening of a predetermined size and shape in the surface thereof; b) a reset switch having a spring loaded switch arm extending therefrom with a normally closed first position and an open second position, said reset switch being connected in series with and opening said holding circuit whenever said reset switch is open and completing said holding circuit whenever said reset switch is closed; c) an insert with a first and second dimension of a size and shape such that said first and second dimensions will mate with and fit within said slot opening, and with a third dimension greater than said slot depth such that said insert can be inserted into said slot to the bottom thereof with a predetermined amount of said insert extending outwardly therefrom;
said reset switch being located and oriented within said alarm box relative to said slot such that when said insert is inserted to the bottom of said slot, said arm of said reset switch will be forced by said insert from the first to the second position. - View Dependent Claims (11, 12, 13)
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14. In self contained battery operated alarm apparatus of the type using audible alarm means arranged to be placed within a building near an outer opening thereof, having a switch with a switch trip comprising an attached line for closing said switch, and being connected to said alarm apparatus such as to sound the alarm when said switch is closed, said line being arranged such that whenever said line is disturbed said line will close said switch, the improvement comprising:
a) said switch comprising a rotary switch having a rotor with spring return means for returning said rotor to an initial open position, said rotary switch having means for completing a number of switch closures for each rotor rotation, having rotation means for rotating said rotor by means of said line, and having said line connected thereto, said line being arranged to extend from said rotary switch across a building opening when the alarm apparatus is attached near the building opening with a predetermined orientation, such that when said line is disturbed said rotor will be rotated by said line and cause a closure of said switch. - View Dependent Claims (15, 16, 17)
Specification