US2454234A - Portable alarm - Google Patents

Portable alarm Download PDF

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Publication number
US2454234A
US2454234A US587875A US58787545A US2454234A US 2454234 A US2454234 A US 2454234A US 587875 A US587875 A US 587875A US 58787545 A US58787545 A US 58787545A US 2454234 A US2454234 A US 2454234A
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United States
Prior art keywords
door
alarm
panel
lever
closure
Prior art date
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Expired - Lifetime
Application number
US587875A
Inventor
Sundel Samuel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ALEXANDER SUNDEL
CHRIST BASTIS
Original Assignee
ALEXANDER SUNDEL
CHRIST BASTIS
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Application filed by ALEXANDER SUNDEL, CHRIST BASTIS filed Critical ALEXANDER SUNDEL
Priority to US587875A priority Critical patent/US2454234A/en
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Publication of US2454234A publication Critical patent/US2454234A/en
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Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/16—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. for a door switch, a limit switch, a floor-levelling switch of a lift
    • H01H3/161—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. for a door switch, a limit switch, a floor-levelling switch of a lift for actuation by moving a closing member, e.g. door, cover or lid

Definitions

  • the device of the presentinvention is an improvement on my previous patents, No. 1,099,777, of June 9, 1914, and No. 1,377,939 of May 10, 1921, onPortable burglar alarms.
  • This invention accomplishes all the objects of my prior patents by use of a much simpler mechanism, employing fewer parts and eliminating the necessity of securing or anchoring part of the mechanism.
  • the invention also contemplates an alarm which is more positive in operation and may be adjusted to conform to variations in door and door frame constructions.
  • Figure l is a front elevational view of an alarm constructed in accordance with the present invention illustrating its application;
  • Figure 2 is a top plan view of the same
  • Figure 3 is a side elevational view of theadjustable door jamb engaging plate and detent
  • Figure 4 is a fragmentary topplan View of a modified form of the invention showing the free end of the reversible lever in spaced relation to its contact plate,
  • a door jamb or frame 5 is shown, in which a door 6 is mounted in a manner well known in the art.
  • the device of my invention consists of a self contained portable unit, capable of application to any movable or fixed object. When used as a burglar alarm, the unit is mounted upon the door, operation being effected upon opening the door.
  • the unit embodies a panel I which is equipped with a pair of supporting plates 8, each of the plates having an eye adapted for the reception of a screw 9. The screws may be engaged in the door as illustrated in the drawing.
  • the panel carries on its front face, an audible signal, generally designated [0, which, in this instance, is shown to be an electric bell, the clapper ll of which is operated by electro-magnets l2.
  • the electro-magnets are in circuit, as indicated at [3, with batteries M which are detachably mounted in a cylindrical case, IS.
  • the bottom of the case is equipped with a removable cap 16 which carries a spring I! that normally urges the batteries upwardly in the case l5 to engage a contact I8 detachably mounted on the panel.
  • the bell circuit is closed in the present embodiment of the invention by the opening of the door.
  • the specific means used in the present instance for performing this function includes a reversible inherently resilient lever it, one end of which is spaced from and'pivotally engaged to the panel, bein secured from displacement by a wing nut 21! threaded ona .complemental shaft 20', as illustrated to advantage in Figure '2.
  • the opposite end of the lever extends beyond one side of thcpanel :1 and is bent at-righ't angles as-indicated at 2
  • the rightangle extension 2i carries a bifurcated plate-22, the branches of the bifurcation straddling a threaded shank 23 which-extends outwardly from the right angled portionii of the reversible lever and is engaged with a hum nu he do r jamb engagin d o the-plate 22 carriesa pivotally mounted spacer 25 which is adapted to engage the door jamb when the device of theipresent inventionis used as a burglar alarm.
  • the lever [B is adapted to be positioned over either of the strips .26 to close the circuit and sound the alarm.
  • the lever I9 is normally he i 1 a ion t t und r in s r by an adjusting screw 21. The screw is hand operated and may be urged, in an obvious manner, into engagement with the panel I. By use of the screw 21, adjustment of the reversible lever I! may be made to retain the lever spaced from its subjacent strip 26.
  • the device is used as a burgler alarm in the following manner:
  • the screw 21 is adjusted to hold the lever l9 out of contact with the strip 26 and the panel 1 is secured to an open door 6.
  • the pivoted spacer 25 is then manually maintained in its extended position (shown by dotted lines in Figure 3) as the door 6 is moved to its closed position.
  • the spacer 25 then engages the door frame 5 and the lever I9 is held in spaced relationship with the contact 26.
  • the screw 21 is next unscrewed so that it cannot prevent the lever [9 from moving into contact with strip 26 when the door is opened by a prowler.
  • the device is now set.
  • the detent 25 is not set. By bifurcating the plate 22, the latter may be adjusted so as to conform to variations in door and door jamb constructions and contours.
  • the screw 21 is urged against the panel so as to feed the operating end of the reversible lever outwardly; or if desired, the lever may be swun on its axis so as to place the operative end thereof at a point above the panel.
  • the alarm may be used with a door opening from either side of the door jamb.
  • the panel 1 is secured to a fixed object in a room and a cable 28 engaged with the free end of the lever l9.
  • the cable is drawn taut to pull the lever away from the contact strip 26.
  • the cable may be made of fusible or ignitible material to break when exposed to a flame or when subjected to predetermined temperatures.
  • Any failure of the cable 28 results in sounding the alarm. This includes breakage of the cable such as by contact of a part of the body of an intruder therewith.
  • a portable self-contained alarm of the type including a mounting panel adapted to be secured to a closure, a circuit maker and breaker embodying a pair of relatively spaced contacts fixedly secured to the panel, a resilient contact strip pivoted to the panel and movable about its pivot into a position overlying a selected one of the fixed contacts and extending beyond the edge ofthe closure, and a spacer pivotally mounted on the extended end of said resilient contact strip, the pivoted spacer having a set position extending from the resilient contact strip and into engagement with the closure frame when the closure is closed, the spacer being automatically pivotable, when the closure is opened, to a free position wherein it does not engage the closure frame when the closure is subsequently closed.
  • a portable self-contained alarm of the type including a mounting panel adapted to be secured to a closure, a circuit maker and breaker embodying a contact fixedly secured to the panel, a resilient contact strip secured at one end to the panel, the other end overlying the fixed contact and extending beyond the edge of the closure, and a spacer pivotally mounted on the extended end of said resilient contact strip, the pivoted spacer having a set position extending from the resilient contact strip and into engagement with the closure frame When the closure isclosed, the spacer being automatically pivotable, when the closure is opened, to a free position wherein it does not engage the closure frame when the closure is subsequently closed.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Burglar Alarm Systems (AREA)

Description

Nov. 16, 1948.
Filed April 12, 1945 mNi Patented Nov. 16, 1948 UNITED STATES CE ORT ALARM Application April-12, 1945, SerialNo. 587,875
,2 Claims. 1
The device of the presentinvention is an improvement on my previous patents, No. 1,099,777, of June 9, 1914, and No. 1,377,939 of May 10, 1921, onPortable burglar alarms. This invention accomplishes all the objects of my prior patents by use of a much simpler mechanism, employing fewer parts and eliminating the necessity of securing or anchoring part of the mechanism.
The invention also contemplates an alarm which is more positive in operation and may be adjusted to conform to variations in door and door frame constructions.
Other objects of the invention will be manifest from'the following description of the present preferred form of the invention, taken in connection with the accompanying drawings, wherein:
Figure l is a front elevational view of an alarm constructed in accordance with the present invention illustrating its application;
Figure 2 is a top plan view of the same;
Figure 3 is a side elevational view of theadjustable door jamb engaging plate and detent;
and
Figure 4 is a fragmentary topplan View of a modified form of the invention showing the free end of the reversible lever in spaced relation to its contact plate,
In order to illustrate the application of the invention, a door jamb or frame 5 is shown, in which a door 6 is mounted in a manner well known in the art.
The device of my invention consists of a self contained portable unit, capable of application to any movable or fixed object. When used as a burglar alarm, the unit is mounted upon the door, operation being effected upon opening the door. The unit embodies a panel I which is equipped with a pair of supporting plates 8, each of the plates having an eye adapted for the reception of a screw 9. The screws may be engaged in the door as illustrated in the drawing. The panel carries on its front face, an audible signal, generally designated [0, which, in this instance, is shown to be an electric bell, the clapper ll of which is operated by electro-magnets l2. The electro-magnets are in circuit, as indicated at [3, with batteries M which are detachably mounted in a cylindrical case, IS. The bottom of the case is equipped with a removable cap 16 which carries a spring I! that normally urges the batteries upwardly in the case l5 to engage a contact I8 detachably mounted on the panel.
The bell circuit is closed in the present embodiment of the invention by the opening of the door. The specific means used in the present instance for performing this function, includes a reversible inherently resilient lever it, one end of which is spaced from and'pivotally engaged to the panel, bein secured from displacement by a wing nut 21! threaded ona .complemental shaft 20', as illustrated to advantage in Figure '2. The opposite end of the lever extends beyond one side of thcpanel :1 and is bent at-righ't angles as-indicated at 2|. The rightangle extension 2i carries a bifurcated plate-22, the branches of the bifurcation straddling a threaded shank 23 which-extends outwardly from the right angled portionii of the reversible lever and is engaged with a hum nu he do r jamb engagin d o the-plate 22 carriesa pivotally mounted spacer 25 which is adapted to engage the door jamb when the device of theipresent inventionis used as a burglar alarm.
Contact strips 25 are mounted on the outer face of the panel"! at the upper end of the latter, 1 9th ft tri s be ng in l t a omm cation, as illustrated in thedrawing, with the contact I8 The lever [B is adapted to be positioned over either of the strips .26 to close the circuit and sound the alarm. The lever I9 is normally he i 1 a ion t t und r in s r by an adjusting screw 21. The screw is hand operated and may be urged, in an obvious manner, into engagement with the panel I. By use of the screw 21, adjustment of the reversible lever I!) may be made to retain the lever spaced from its subjacent strip 26.
The device is used as a burgler alarm in the following manner: The screw 21 is adjusted to hold the lever l9 out of contact with the strip 26 and the panel 1 is secured to an open door 6. The pivoted spacer 25 is then manually maintained in its extended position (shown by dotted lines in Figure 3) as the door 6 is moved to its closed position. The spacer 25 then engages the door frame 5 and the lever I9 is held in spaced relationship with the contact 26. The screw 21 is next unscrewed so that it cannot prevent the lever [9 from moving into contact with strip 26 when the door is opened by a prowler. The device is now set.
When the door 6 is opened, the lever I9 springs into contact with the strip 26 and the alarm is sounded. The moment the pivoted spacer 25 leaves the door frame 5, the spacer swings downwardly to the position shown in Figure 3. Then, if the unauthorized person opening the door quickly shuts the door upon hearing the alarm, his closing of the door will not shut off the alarm because after the spacer 25 has dropped down,
the lever l9 remains in contact with the strip 26 even though the door is closed. By this construction, the occupant of the room is fully aroused and warned of the attempted entrance. The occupant himself must turn off the alarm by urging screw 21 against the panel 1. He can then instigate an investigation of the premises.
In the event the device is to be used as an ordinary doorbell, the detent 25 is not set. By bifurcating the plate 22, the latter may be adjusted so as to conform to variations in door and door jamb constructions and contours. When the device is to be rendered inoperative, the screw 21 is urged against the panel so as to feed the operating end of the reversible lever outwardly; or if desired, the lever may be swun on its axis so as to place the operative end thereof at a point above the panel. By providing strips 26 at opposite sides of the panel '1, the alarm may be used with a door opening from either side of the door jamb.
Should it be desired to use the present invention as a fire alarm, the panel 1 is secured to a fixed object in a room and a cable 28 engaged with the free end of the lever l9. The cable is drawn taut to pull the lever away from the contact strip 26. The cable may be made of fusible or ignitible material to break when exposed to a flame or when subjected to predetermined temperatures.
Any failure of the cable 28 results in sounding the alarm. This includes breakage of the cable such as by contact of a part of the body of an intruder therewith.
While I have herein described a preferred embodiment of this invention, it is to be understood that various changes may be made therein within the scope of the claims hereto appended.
What I claim is:
1. In a portable self-contained alarm of the type including a mounting panel adapted to be secured to a closure, a circuit maker and breaker embodying a pair of relatively spaced contacts fixedly secured to the panel, a resilient contact strip pivoted to the panel and movable about its pivot into a position overlying a selected one of the fixed contacts and extending beyond the edge ofthe closure, and a spacer pivotally mounted on the extended end of said resilient contact strip, the pivoted spacer having a set position extending from the resilient contact strip and into engagement with the closure frame when the closure is closed, the spacer being automatically pivotable, when the closure is opened, to a free position wherein it does not engage the closure frame when the closure is subsequently closed.
2. In a portable self-contained alarm of the type including a mounting panel adapted to be secured to a closure, a circuit maker and breaker embodying a contact fixedly secured to the panel, a resilient contact strip secured at one end to the panel, the other end overlying the fixed contact and extending beyond the edge of the closure, and a spacer pivotally mounted on the extended end of said resilient contact strip, the pivoted spacer having a set position extending from the resilient contact strip and into engagement with the closure frame When the closure isclosed, the spacer being automatically pivotable, when the closure is opened, to a free position wherein it does not engage the closure frame when the closure is subsequently closed.
SAMUEL SUNDEL.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 723,478 Mills Mar. 24, 1903 828,834 Bell Aug. 14, 1906 842,407 Mamy Jan. 29, 1907 1,009,285 Crowley Nov. 21, 1911 1,012,590 Bobo Dec. 26, 1911 1,115,830 Jones, Jr. Nov. 3, 1914 1,156,809 Pidgeon Oct. 12, 1915 1,204,513 Smith Nov. 14, 1916 1,377,939 Sundel May 1 0, 1921 1,595,520 Larson Aug. 10, 926 1,784,479 Bellman Dec. 9, 1930 2,193,690 Johnson Mar. 12, 1940
US587875A 1945-04-12 1945-04-12 Portable alarm Expired - Lifetime US2454234A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2943308A (en) * 1956-03-15 1960-06-28 Everett A Westphal Protective alarm system

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US723478A (en) * 1902-04-15 1903-03-24 George W Mills Burglar-alarm.
US828834A (en) * 1906-02-06 1906-08-14 Burton S Bell Burglar-alarm.
US842407A (en) * 1903-12-09 1907-01-29 Gustave Mamy Extra-highly-vibrating contact-breaker.
US1009285A (en) * 1911-02-14 1911-11-21 William Crowley Portable burglar-alarm.
US1012590A (en) * 1908-07-31 1911-12-26 Charles F Bobo Electric door-alarm.
US1115830A (en) * 1912-01-13 1914-11-03 James Jones Jr Burglar-alarm.
US1156809A (en) * 1915-03-17 1915-10-12 Thomas L Pidgeon Burglar-alarm bolt.
US1204513A (en) * 1915-08-20 1916-11-14 James W Smith Burglar-alarm.
US1377939A (en) * 1919-10-02 1921-05-10 Louis M Rudman Portable burglar-alarm
US1595520A (en) * 1922-04-18 1926-08-10 Palmer J Larson Door or window operated switch
US1784479A (en) * 1928-11-26 1930-12-09 Bellman Edward Alarm-control unit
US2193690A (en) * 1938-12-02 1940-03-12 Edward S Johnson Burglar alarm

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US723478A (en) * 1902-04-15 1903-03-24 George W Mills Burglar-alarm.
US842407A (en) * 1903-12-09 1907-01-29 Gustave Mamy Extra-highly-vibrating contact-breaker.
US828834A (en) * 1906-02-06 1906-08-14 Burton S Bell Burglar-alarm.
US1012590A (en) * 1908-07-31 1911-12-26 Charles F Bobo Electric door-alarm.
US1009285A (en) * 1911-02-14 1911-11-21 William Crowley Portable burglar-alarm.
US1115830A (en) * 1912-01-13 1914-11-03 James Jones Jr Burglar-alarm.
US1156809A (en) * 1915-03-17 1915-10-12 Thomas L Pidgeon Burglar-alarm bolt.
US1204513A (en) * 1915-08-20 1916-11-14 James W Smith Burglar-alarm.
US1377939A (en) * 1919-10-02 1921-05-10 Louis M Rudman Portable burglar-alarm
US1595520A (en) * 1922-04-18 1926-08-10 Palmer J Larson Door or window operated switch
US1784479A (en) * 1928-11-26 1930-12-09 Bellman Edward Alarm-control unit
US2193690A (en) * 1938-12-02 1940-03-12 Edward S Johnson Burglar alarm

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2943308A (en) * 1956-03-15 1960-06-28 Everett A Westphal Protective alarm system

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