← Back to Patent Explorer
US3728675A Expired / Lapsed US ⏱️ 0.0 years remaining

Cycle alarm apparatus

Assignee: DVA Corp
•
Filing: 1971-05-17
•
Granted: 1973-04-17
•
Expires: 1991-05-17
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract Alarm apparatus suitable for attachment to a motor-cycle for producing an audible alarm when an unauthorized person tilts the cycle from the rest position in which it was left. The apparatus comprises a casing containing the alarm circuit and a selfcontained power supply, the casing being mountable in a fixed angular position on the motorcycle, preferably at the rear of the cycle so that the license plate can then be mounted over the rear of the casing. The casing is held to the cycle by fastening means which are accessible only when a removable portion of the casing is removed, and the alarm circuit is responsive to the removal of the closure portion of the casing to produce an electrical alarm signal when the closure portion is removed so that one cannot remove the entire casing or open the casing to disable it without sounding the alarm. The angle of the cycle is sensed by a pair of mercury switches within the casing, one for sensing tilt in one angular direction and the other for sensing tilt in the other direction from a reference angular position normally defined by the position in which the cycle is held by its stand. The two mercury switches are preferably independently adjustable in angular position so as to accommodate any stand angle. The battery within the casing energizes an alarm circuit whenever either one of the mercury switches is closed by tilting of the cycle or when the closure for the casing is removed, provideded also that a key-operated line switch has also been closed by the operator upon leaving the cycle. The alarm circuit includes a timing circuit such that when one of the switches has been closed and is then reopened, the alarm signal will continue for a predetermined length of time and will then terminate, thereby providing an adequate alarm in case of tampering with the cycle yet preventing continued operation of the alarm which will unduly deplete the battery supply.

Inventors

  • 👤 R Horn
  • 👤 I Bash

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 06:15
CPC Classifications
B; B60; B60R; B60R25/00; B60R25/10; B60R25/1004; B60R25/1006; B60R25/1007; B60R2025/1013; B60R2025/1016

Claims Analysis

Total Claims: 12
Claim 1
Independent Claim 189 words
A cycle alarm, comprising: an enclosure adapted to be secured to a cycle; angle-sensing switch means secured to and within said enclosure, comprising a first switch having a first condition in which it remains so long as said enclosure is positioned within a predetermined range of angular positions with respect to the vertical and responsive to a departure of said enclosure from said range of angular positions to actuate said first switch to a second condition thereof; a source of electrical supply voltage within said enclosure; alarm means within said enclosure for generating alarm signals when supplied with said supply voltage; means connecting said source and said first switch with said alarm means to generate said alarm signals when said first switch is actuated to said second condition thereof; means for continuing said alarm signals for at least a predetermined interval after each actuation of said first switch to said second condition despite return of said switch to said first condition thereof, and for terminating said alarm signals automatically at a time following return of said switch to said first condition by an interval equal to said predetermined interval.
Claim 2
Dependent Claim 189 words
A cycle alarm, comprising: an enclosure adapted to be secured to a cycle; angle-sensing switch means secured to and within said enclosure, comprising a first switch having a first condition in which it remains so long as said enclosure is positioned within a predetermined range of angular positions with respect to the vertical and responsive to a departure of said enclosure from said range of angular positions to actuate said first switch to a second condition thereof; a source of electrical supply voltage within said enclosure; alarm means within said enclosure for generating alarm signals when supplied with said supply voltage; means connecting said source and said first switch with said alarm means to generate said alarm signals when said first switch is actuated to said second condition thereof; means for continuing said alarm signals for at least a predetermined interval after each actuation of said first switch to said second condition despite return of said switch to said first condition thereof, and for terminating said alarm signals automatically at a time following return of said switch to said first condition by an interval equal to said predetermined interval.
Claim 3
Dependent Claim 86 words
The cycle alarm of claim 1, in which said angle-sensing means comprises a second switch in parallel with said first switch, said first switch being actuated to its closed condition when said enclosure departs from said range of angular positions in one angular sense, and said second switch being operated to its closed condition when said enclosure departs from said angular range in the opposite angular sense, each of said first and second switches being independently settable to different angular positions with respect to said enclosure.
Claim 4
Dependent Claim 28 words
The cycle alarm of claim 1, in which said alarm means comprises sound generating means responsive to supply thereto of said supply voltage to sound an audible alarm.
Claim 5
Dependent Claim 45 words
The cycle alarm of claim 3, comprising electronic switch means connected between said source and said sound generating means, said electronic switch means being normally open but responsive to actuation of said first switch to said second condition to be rendered conductive at least intermittently.
Claim 6
Dependent Claim 34 words
The cycle alarm of claim 4, comprising means responsive to actuation of said first switch to said second condition to render said electronic switch means intermittently conductive, thereby to sound said audible alarm intermittently.
Claim 7
Dependent Claim 39 words
The cycle alarm of claim 1, comprising a trigger circuit connected between said first switch and said alarm means initiating operation of said alarm means only when the voltage supplied to said trigger circuit rises above a predetermined level.
Claim 8
Dependent Claim 67 words
The cycle alarm of claim 6, comprising resistance-capacitance timing circuit means connected between said source and said trigger circuit by way of said first switch for providing prompt turn-on of said trigger circuit when said first switch is actuated to said second condition and for delaying by a predetermined time interval the turn-off of said trigger circuit when said first switch is returned to said first condition.
Claim 9
Dependent Claim 26 words
The cycle alarm of claim 1, comprising a key switch on said enclosure connected to control connection of said source to the remainder of the circuit.
Claim 10
Dependent Claim 62 words
The cycle alarm of claim 8, comprising capacitance means for maintaining operation of said alarm means for a predetermined time interval after each actuation of said first switch to said second condition, and diode means connected to discharge said capacitance means more rapidly when said key switch is open than when said key switch is closed and said first switch is open.
Claim 11
Dependent Claim 64 words
The cycle alarm of claim 1, in which said enclosure is provided with a removable cover portion, and with another portion mountable to said cycle and having fastening means operable only from the interior of said enclosure to remove said enclosure from said cycle, said enclosure containing additional switch means operable in response to removal of said cover portion to operate said alarm means.
Claim 12
Dependent Claim 32 words
The cycle alarm of claim 1, in which said alarm means comprises means responsive to application thereto of said supply voltage to generate audio-modulated radio-frequency signals for radiation to a remote receiver.

References Cited (Backward Citations)

US1298055A Cited
US2823367A Cited
US3461423A Cited
US3531793A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-04-16 1976-10-16 1977-04-17 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-04-16 1980-10-16 1981-04-17 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-04-16 1984-10-16 1985-04-17 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag