Door bolt with electric alarm

Claim 2

In a door bolt with electric alarm, a door bolt, a door bolt housing assembly mounted to a door and carrying said door bolt as the door bolt travels between locked and unlocked positions, alarm means including a power source, an operating indicator and an alarm, means for detecting the position of said door bolt including a detector switch and an intruder switch connected in circuit with said power source, operating indicator and alarm, said detector switch having normally open contacts, which are moved to a closed position when said door bolt is moved to a locked position, completing a circuit between said power source and indicator, said intruder switch including normally open switch contacts connecting said alarm to said power source through the contacts of said detector switch, an actuating arm controlling the opening and closing of said intruder switch contacts and a roller wheel fastened on said actuating arm and positioned for contact by said door bolt when the door bolt is in a locked position, movement of said door bolt in a manner other than normal opening or closing causing said intruder switch to complete an electrical circuit from said power source to said alarm.

Claim 3

The structure of claim 1 further characterized in that said alarm is a buzzer.

Claim 4

The structure of claim 1 further characterized in that said operating indicator is a lamp.

Claim 5

The structure of claim 1 further characterized in that said intruder switch and detector switch are positioned such that the opening of said switch contacts of said intruder switch occur before said door bolt depresses said actuator button of said detector switch.

Claim 6

The structure of claim 4 further characterized in that said door bolt releases said roller wheel and said actuating arm of said intruder switch closing said switch contacts when an intruder applies force to the door or severs said door bolt, said alarm actuated by the closing of said switch contacts of said intruder switch and said detector switch.

Claim 7

The structure of claim 5 further characterized in that said door bolt housing assembly includes means for positioning said door bolt to depress and release the actuator button of said detector switch as said door bolt is placed in the locked position and to depress and release said actuator button as said door bolt is unlocked.

Claim 8

The structure of claim 6 further characterized in that the contacts of said detector switch are latched closed when said actuator button is depressed and released by said door bolt when being locked and in that said contacts are opened when said actuator button is depressed and released by said door bolt when being unlocked.

Claim 9

In a door bolt with electric alarm, a door bolt, a door bolt housing assembly mounted to a door and carrying said door bolt as the door bolt travels between locked and unlocked positions, alarm means including a power source, an operating indicator and an alarm, means for detecting the position of said door bolt including a detector switch and an intruder switch connected in circuit with said power source, operating indicator and alarm, said detector switch having normally open contacts, which are moved to a closed position when said door bolt is moved to a locked position, completing a circuit between said power source and indicator, said intruder switch including a pair of normally open contacts, an actuator button controlling the opening and closing of said intruder switch contacts, and an actuator arm which, when displaced, actuates said actuator button, said door bolt including a bolt sleeve fastened by spring means on the end of said door bolt that enters said detecting means, with said detecting means including a housing having a jam housing cam, movement of said door bolt in a manner other than normal opening or closing causing said intruder switch to complete an electrical circuit frOm said power source to said alarm.

Claim 10

In a door bolt with electric alarm, a door bolt, a door bolt housing assembly mounted to a door and carrying said door bolt as the door bolt travels between locked and unlocked positions, alarm means including a power source, an operating indicator and an alarm, means for detecting the position of said door bolt including a detector switch and an intruder switch connected in circuit with said power source, operating indicator and alarm, said detector switch having normally open contacts, which are moved to a closed position when said door bolt is moved to a locked position, completing a circuit between said power source and indicator, said intruder switch including a pair of normally open contacts, an actuator button controlling the opening and closing of said intruder switch contacts, and an actuator arm which, when displaced, actuates said actuator button, said door bolt including a bolt sleeve fastened by spring means on the end of said door bolt that enters said detecting means, with said detecting means including a housing having a jam housing cam, movement of said door bolt in a manner other than normal opening or closing causing said intruder switch to complete an electrical circuit frOm said power source to said alarm.

Claim 11

The structure of claim 8 further characterized in that said bolt sleeve contacts said jam housing cam causing said bolt sleeve to apply force to said actuating arm of said intruder switch when an intruder applies force to the door or severs said door bolt and attempts to open the door, said bolt sleeve continuing to apply force to said actuating arm of said detector switch.

Claim 12

The structure of claim 9 further characterized in that said alarm is connected to said power source through the switch contacts of said detector switch and said switch contacts of said intruder switch, said switch contacts of said intruder switch closing when said bolt sleeve applies force to said actuating arm of said intruder switch, said alarm being actuated by said power source.

Claim 13

In a door bolt with electric alarm, a door bolt, a door bolt housing assembly mounted to a door and carrying said door bolt as the door bolt travels between locked and unlocked positions, alarm means including a power source, an operating indicator and an alarm, means for detecting the position of said door bolt including a detector switch and an intruder switch connected in circuit with said power source, operating indicator and alarm, said detector switch having normally open contacts, which are moved to a closed position when said door bolt is moved to a locked position, completing a circuit between said power source and indicator, said intruder switch including normally open switch contacts, with both said intruder switch and detector switch including an actuator button controlling the opening and closing of said switch contacts, said alarm being connected to said power source through the contacts of said intruder switch and through the contacts of said detector switch, said detector means including a spring applying force to said door bolt in a normal direction to the door, said door bolt including a bolt cam at the end thereof extending into said detecting means, said bolt cam being arranged in said door bolt so as to contact said actuator button of said detector switch only when said door bolt is in the locked position, movement of said door bolt in a manner other than normal opening or closing said intruder switch to complete an electrical circuit from said power source to said alarm.

Claim 14

In a door bolt with electric alarm, a door bolt, a door bolt housing assembly mounted to a door and carrying said door bolt as the door bolt travels between locked and unlocked positions, alarm means including a power source, an operating indicator and an alarm, means for detecting the position of said door bolt including a detector switch and an intruder switch connected in circuit with said power source, operating indicator and alarm, said detector switch having normally open contacts, which are moved to a closed position when said door bolt is moved to a locked position, completing a circuit between said power source and indicator, said intruder switch including normally open switch contacts, with both said intruder switch and detector switch including an actuator button controlling the opening and closing of said switch contacts, said alarm being connected to said power source through the contacts of said intruder switch and through the contacts of said detector switch, said detector means including a spring applying force to said door bolt in a normal direction to the door, said door bolt including a bolt cam at the end thereof extending into said detecting means, said bolt cam being arranged in said door bolt so as to contact said actuator button of said detector switch only when said door bolt is in the locked position, movement of said door bolt in a manner other than normal opening or closing said intruder switch to complete an electrical circuit from said power source to said alarm.

Claim 15

The structure of claim 11 further characterized in that said actuator button of said intruder switch is depressed opening said contacts when said door bolt is in the locked position before said bolt cam contacts said actuator button of said detector switch, said switch contacts of said detector switch closing when said bolt cam contacts said actuator button actuating said operating indicator.

Claim 16

The structure of claim 12 further characterized in that said door bolt allows said actuator button of said intruder switch to be released when an intruder applies force to the door and said door bolt moves away from said actuating button of said intruder switch or when intruder severs said door bolt and said spring pushes said door bolt away from said actuator button of said intruder switch.

Claim 17

The structure of claim 13 further characterized in that said contacts of said intruder switch close when an intruder applies force or severs said door bolt and said door bolt releases said actuator button, said alarm being actuated by the switch contacts of said intruder switch.