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 Title: |
US3848750:
CRANE TIP ALARM
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Hoge, Daniel W.; Wilmington, CA 90744
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| Assignee: |
None
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| Published / Filed: |
1974-11-19
/ 1973-02-09
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| Application Number: |
US1973000331218
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| IPC Code: |
Advanced:
B66C 23/90;
IPC-7:
B66C 23/84;
G08C 21/00;
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| ECLA Code: |
B66C23/78; B66C23/90B;
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| U.S. Class: |
Current:
212/277;
116/202;
212/302;
340/685;
340/689;
340/870.29;
340/870.31;
Original:
212/069;
212/039.MS;
116/124.F;
340/190;
340/267.C;
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| Field of Search: |
212/39 MS,69
340/188 R,188 CH,190,267 C
116/124 F
222/055
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| Priority Number: |
| 1973-02-09 |
US1973000331218 |
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| Abstract: |
The invention provides several tilt indication/warning devices for use on equipment or vehicles having a rotating, angularly upstanding boom such as fire-fighting and rescue apparatus and particularly mobile cranes such as used to shift containerized cargo between the holds of ships and land carriers.
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| Attorney, Agent or Firm: |
Johnson, Howard L. ;
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| Primary / Asst. Examiners: |
Reeves, Robert B.; Lane, H. S.
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| Family: |
None
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First Claim:
Show all 9 claims |
I claim:
1. A device for indicating tilting of a structure on which it is mounted, said device comprising photoelectric emitting means suspended by a pendulum swingable over an annular area above vertically aligned photoelectric receiving means electrically connected to a first signaling device, said pendulum also carrying an annular electrical conducting element spacedly disposed within a larger surrounding annular electrical conducting element, contiguity between the two annular elements serving to make a circuit to a second tilt signaling device, whereby the two tilt signaling devices indicate progressive amounts of tilt of said structure.
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| Background / Summary: |
Show background / summary
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| Drawing Descriptions: |
Show drawing descriptions
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| Description: |
Show description
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| Forward References: |
Show 16 U.S. patent(s) that reference this one
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