US1208129A

US1208129A - Alarm for knobs.

Info

Publication number: US1208129A
Application number: US1153015A
Authority: US
Inventors: Edward J Fuller
Original assignee: Individual
Current assignee: Individual
Priority date: 1915-03-02
Filing date: 1915-03-02
Publication date: 1916-12-12
Anticipated expiration: 1933-12-12

Description

E. J. FULLER.

ALARM FOR KNOBS.

APPLICATION FILED MAR.2,1915.

Patented Dec. 12, 1916.

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EDWARD J. FULLER, OF NEW YORK. N. Y.

ALARM FOR KN OBS.

Application filed March 2, 1915.

To all whom it may concern Be it known that I, EDWARD J. FULLER, a citizen of the United States, and resident of the borough of Manhattan, in the city and State of New York, have invented a new and useful Improvement in Alarms for Knobs, of which the following is a specification.

This invention relates to an improvement in an alarm for knobs and has for its object to provide a device which is electrically opis represented in the accompanying drawings, in which- Figure 1 represents an end elevation of a portion of a door showing the knob located upon the outside of the door in section, F1g.

- represents a transverse section through the outside knob taken in the plane of the line AA of Fig. 1, Fig. 3 represents a transverse section of the same taken in the plane of the line I3I3 of Fig. 1, and Fig. 4: represents a transverse section taken in the plane of the line CC of Fig. 1.

The door, denoted by 1, is provided with a lock 2 having a latch 3 and a spindle t passing through the lock, to which spindle the shank of a knob 5 is secured by means of a screw 6, all of which is of well known and. approved construction.

The shank 7 of the hollow knob 8 is secured to the spindle 4: by a screw 9. The free end of the shank 7 is provided with an exteriorly threaded portion 10 which has a free threaded engagement with a plate 11, which plate is secured to an interior flange 12 of the knob 8 by means of screws 13. The plate 11 is provided with a slot 14: through which projects a pin 15 fixed in the shank 7. This pin and slot engagement admits of a limited movement of the knob 8 and plate 11 upon the shank 7.

To yieldingly hold the pin 15 in the center of the slot 14 so that the movement of the knob 8 will be the same if turned to the right or to the left, I provide springs 16, 17, the inner ends of which engage the pin 15 and the outer ends engage 18 in Specification of Letters Patent.

Patented Dec. 12, 1916.

Serial No. 11,530.

the plate 11 at points diametrically opposite the pin 15.

A contact piece 19 is adjustably fixed, to turn with the knob 8, upon a stud 20 projecting inwardly within the knob and between nuts 21,22, which have a screw-threaded engagement with the stud 20.

A gravity operated contact piece 23 is mounted to freely swing upon the stud 20 in position to be engaged by the fixed contact piece 19.

In the alarm shown and described, an electric bell 2a is placed at any desirable point and a battery 25 having a wire 26, leads therefrom to the bell. A wire 27 passes from the bell through the lock 2, and channel 28 cut in the shank S and is connected to the pin 15. A wire 29 passes from the battery through the lock and channel and is connected to the contact piece 23 at 30. The contact piece 23 is insulated from the fixed contact piece 19, as shown at 31 in Figs. 1 and 3. Thus it will be seen that the alarm is placed in an open circuit, which is adapted to be closed by the fixed contact piece 19 coming in contact with the loose contact piece 23.

To throw the alarm out of use, a switch 32 is located in the wire 26 between the bell and the battery.

In operation, supposing the parts to be in the position shown in Figs. 1 and 3, the fixed contact piece being free of the loose contact piece 23: Upon turning the knob 8 either to the right or to the left, the fixed contact piece will be brought into engagement with the loose contact piece, as shown in dotted lines in Fig. 3, whereupon the circuit will be closed and the alarm operated, which alarm will continue to operate as long as the circuit is closed. When the knob is released, the spring 16 or 17 will return it to its normal position, thus separating the contact pieces and breaking the circuit.

It will be understood that the fixed contact piece will be brought into engagement with the loose contact piece before the end of the slot 14- has reached the pin 15, so that the spindle t and latch 3 will not be moved until after the alarm has operated. After the end of the slot has reached the pin, the further turning motion of the knob will be imparted to the pin and shank, and thence to the spindle which withdraws the latch.

It is evident that various changes may be resorted to in the form, construction and arrangement of the several parts without departing from the spirit and scope of my invention; and hence I do not wish to limit myself to the specific details set forth except as they be included in the claims.

What I claim is 1. A shank, a hollow knob turnable thereon, an electric alarm having a fixed contact piece carried by the knob and a movable contact piece mounted to swing freely within said knob in position to be engaged by the fixed contact piece, whereby the turning of said knob on the shank will bring the contact pieces together to operate the alarm.

2. A shank, a hollow knob turnable thereon, an electric alarm having a fixed contact piece carried by the knob and a movable contact piece mounted to swing freely within said knob in position to be engaged by the fixed contact piece, whereby the turning of said knob on the shank will bring the contact pieces together to operate the alarm, and means for automatically separating the contact pieces when the knob is released.

3. A shank, a hollow knob tnrnable thereon, an electric alarm having a fixed contact piece carried by the knob and a movable contact piece mounted to swing freely within. said knob in position to be engaged by the fixed contact piece, a lost motion connection between the shank and the knob, whereby the turning of the knob will bring the contact pieces together to operate the alarm, and means for automatically separating the contact pieces when the knob is released.

4. A shank, a hollow knob turnable thereon, said knob having a slot therein, a pin secured to said shank and projecting through said slot for limiting the movement of the knob upon said shank. an electric alarm having a fixed contact piece carried by the knob and a movable contact piece mounted to swing freely within said knob in position to be ei'igaged by the fixed contact piece, whereby the turning of the knob will bring the contact pieces together to operate the alarm, and means between said pin and knob for automatically separating the contact pieces when the knob is released.

A shank, a hollow knob including a removable plate turnable on said shank, said plate having a slot therein, a pin secured to said shank and projecting through said slot for limiting the movement of the knob upon said shank, anelectric alarm having a fixed contact piece carried by the knob and a movable contact piece mounted to swing freely within said knob in position to be engaged by the fixed contact piece, whereby the turning of the knob will bring the contact pieces together to operate the alarm and a spring actuated means between said pin and knob for automatically separating the contact pieces when the knob is released.

In testimony, that I claim the foregoing as my invention, I have signed my name, in presence of two witnesses, this twenty-fifth day of February, 1915.

EDWARD J. FULLER. lVitnesses F. Gnonon BARRY, C. S. SUNDGREN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.