US3558101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
String tensioning device
Assignee: Individual
•
Filing: 1968-06-18
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Granted: 1971-01-26
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Expires: 1988-06-18
Abstract
Abstract A string tensioning device for use in tensioning a string or cord used in grade level establishment and similar operations, the device including a back plate having a pair of substantially parallel flanges extending normal to the side edges thereof, and having a stake receiving sleeve secured thereto. Secured to one of the flanges and projecting outwardly therefrom in a direction substantially normal to the plane of the back plate is a wagging handle. A crank arm extends parallel to the back plate and is rotatably journaled in the flanges. A stop pin is spaced from, and extends substantially parallel to the crank arm and is slidably mounted in the flanges attached to the back plate. The stop pin has a head thereon and a spring which resiliently opposes axial sliding movement of the stop pin in the flanges. The stop pin is of a length such that it can be forced against the resilient bias of the spring into a position where one end of the stop pin opposite its head is interposed in the path of movement of the crank arm so that the crank arm can be prevented from rotating by contact with the stop pin.
Inventors
- 👤 Hubert L Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:14
CPC Classifications
E; E04; E04G; E04G21/00; E04G21/14; E04G21/16; E04G21/18; E04G21/1808; A; A01; A01K; A01K89/00; A01K89/015; D; D06; D06F; D06F53/00; D06F53/04; D06F53/045; Y; Y10; Y10T; Y10T24/00; Y10T24/21
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
222 words
A device for tensioning a flexible member comprising: a back plate; a stake-receiving sleeve secured to said back plate on one side thereof; a pair of parallel flanges secured to opposed side edges of said back plate and projecting in the opposite direction therefrom as the direction of projection of said sleeve, said flanges having a first pair of aligned apertures therethrough and a second pair of aligned apertures therethrough spaced from said first pair of aligned pa apertures, and positioned vertically therebelow; a crank arm extending through said first paid of aligned apertures and parallel to said back plate, said crank arm being rotatably journaled in said flanges; a stop pin extending slidably through said second pair of aligned apertures and parallel to said back plate, said stop pin being movable between a first position in which it extends into the path of rotational movement of said crank arm and a second position in which it is clear of said path of rotational movement; and a guide sleeve secured between said flanges and surrounding said stopping, said guide sleeve being positioned directly below, and extending substantially parallel to, said crank arm for guiding a flexible member from a vertically lower point to a point on the periphery of said crank arm to facilitate winding said flexible member on said crank arm.
Claim 2
Independent Claim
222 words
A device for tensioning a flexible member comprising: a back plate; a stake-receiving sleeve secured to said back plate on one side thereof; a pair of parallel flanges secured to opposed side edges of said back plate and projecting in the opposite direction therefrom as the direction of projection of said sleeve, said flanges having a first pair of aligned apertures therethrough and a second pair of aligned apertures therethrough spaced from said first pair of aligned pa apertures, and positioned vertically therebelow; a crank arm extending through said first paid of aligned apertures and parallel to said back plate, said crank arm being rotatably journaled in said flanges; a stop pin extending slidably through said second pair of aligned apertures and parallel to said back plate, said stop pin being movable between a first position in which it extends into the path of rotational movement of said crank arm and a second position in which it is clear of said path of rotational movement; and a guide sleeve secured between said flanges and surrounding said stopping, said guide sleeve being positioned directly below, and extending substantially parallel to, said crank arm for guiding a flexible member from a vertically lower point to a point on the periphery of said crank arm to facilitate winding said flexible member on said crank arm.
Claim 3
Dependent Claim
34 words
A tensioning device as defined in claim 1 and further characterized as including an elongated wagging handle secured to one of said flanges and projecting therefrom in a direction substantially normal to said plate.
Claim 4
Independent Claim
184 words
A device for tensioning a flexible member comprising: a back plate; a stake-receiving sleeve secured to said back plate on one side thereof; a pair of parallel flanges secured to opposed side edges of said back plate and projecting in the opposite direction therefrom as the direction of projection of said sleeve, said flanges having a first pair of aligned apertures therethrough and a second pair of aligned apertures therethrough spaced from said first pair of aligned apertures; a crank arm extending through said first paid of aligned apertures and parallel to said back plate, said crank arm being rotatably journaled in said flanges; a stop pin extending slidably tr through said second pair of aligned apertures and parallel to said back plate, said stop i pin being movable between a first position in which it extends into the path of rotational movement of said crank arm and a second position in which it is clear of said path of rotational movement; and an elongated wagging handle secured to one of said flanges and projecting therefrom in a direction substaNtially normal to said plate.
Claim 5
Independent Claim
184 words
A device for tensioning a flexible member comprising: a back plate; a stake-receiving sleeve secured to said back plate on one side thereof; a pair of parallel flanges secured to opposed side edges of said back plate and projecting in the opposite direction therefrom as the direction of projection of said sleeve, said flanges having a first pair of aligned apertures therethrough and a second pair of aligned apertures therethrough spaced from said first pair of aligned apertures; a crank arm extending through said first paid of aligned apertures and parallel to said back plate, said crank arm being rotatably journaled in said flanges; a stop pin extending slidably tr through said second pair of aligned apertures and parallel to said back plate, said stop i pin being movable between a first position in which it extends into the path of rotational movement of said crank arm and a second position in which it is clear of said path of rotational movement; and an elongated wagging handle secured to one of said flanges and projecting therefrom in a direction substaNtially normal to said plate.
Claim 6
Independent Claim
194 words
A device for tensioning a flexible member comprising: a back plate; a stake-receiving sleeve secured to said back plate on one side thereof; a pair of parallel flanges secured to opposed side edges of said back plate and projecting in the opposite direction therefrom as the direction of projection of said sleeve, said flanges having a first pair of aligned apertures therethrough and a second pair of aligned apertures therethrough spaced from said first pair of aligned apertures; a crank arm extending through said first pair of aligned apertures and parallel to said back plate, said crank arm being rotatably journaled in said flanges; a stop pin extending slidable slidably through said second pair of aligned apertures and parallel to said back plate, said stop pin being movable between a first position in which it extends into the path or rotational movement of said crank arm and a second position in which it is clear of said path of rotational movement; a head on one end of said stop pins; spring means between said head and one of said flanges; and movement limiting means on the other end o of said stop pin .
Claim 7
Independent Claim
194 words
A device for tensioning a flexible member comprising: a back plate; a stake-receiving sleeve secured to said back plate on one side thereof; a pair of parallel flanges secured to opposed side edges of said back plate and projecting in the opposite direction therefrom as the direction of projection of said sleeve, said flanges having a first pair of aligned apertures therethrough and a second pair of aligned apertures therethrough spaced from said first pair of aligned apertures; a crank arm extending through said first pair of aligned apertures and parallel to said back plate, said crank arm being rotatably journaled in said flanges; a stop pin extending slidable slidably through said second pair of aligned apertures and parallel to said back plate, said stop pin being movable between a first position in which it extends into the path or rotational movement of said crank arm and a second position in which it is clear of said path of rotational movement; a head on one end of said stop pins; spring means between said head and one of said flanges; and movement limiting means on the other end o of said stop pin .
Claim 8
Dependent Claim
44 words
A tensioning device as defined in claim 2 and further characterized to include: a head on one end of said stop pin; a spring between said head and one of said flanges; and movement limiting means on the other end of said stop pin.
Claim 9
Independent Claim
232 words
A system for establishing a horizontal reference level comprising: a pair of spaced, vertically extending stakes; a tensioning device including: a back plate; a sleeve secured to said back plate on one side thereof and l slidably receiving one of said stakes; a pair of parallel flanges secured to opposed side edges of said back plate and projecting in the opposite direction therefrom as the direction of projection from the back plate of said sleeve, said flanges having a first pair of aligned apertures therethrough and a second pair of aligned apertures therethrough spaced from said first pair of aligned apertures; a crank arm extending through said first pair of aligned apertures and parallel to said back plate, said crank arm being rotatably journaled i in said flanges; and a stop pin extending slidably through said second pair of aligned apertures and parallel to said back plate, said stop pin being movable between a first position in which it extends into the pate path of rotational movement of said crank arm and a second position in which it is clear of said path o of rotational movement; means supporting said tensioning device on said one stake at a selected location; and an elongated flexible member extending horizontally between said stakes and having one end portion passed through an angle of substantially 90* around said stop pin and wound upon said crank handle.
Claim 10
Independent Claim
232 words
A system for establishing a horizontal reference level comprising: a pair of spaced, vertically extending stakes; a tensioning device including: a back plate; a sleeve secured to said back plate on one side thereof and l slidably receiving one of said stakes; a pair of parallel flanges secured to opposed side edges of said back plate and projecting in the opposite direction therefrom as the direction of projection from the back plate of said sleeve, said flanges having a first pair of aligned apertures therethrough and a second pair of aligned apertures therethrough spaced from said first pair of aligned apertures; a crank arm extending through said first pair of aligned apertures and parallel to said back plate, said crank arm being rotatably journaled i in said flanges; and a stop pin extending slidably through said second pair of aligned apertures and parallel to said back plate, said stop pin being movable between a first position in which it extends into the pate path of rotational movement of said crank arm and a second position in which it is clear of said path o of rotational movement; means supporting said tensioning device on said one stake at a selected location; and an elongated flexible member extending horizontally between said stakes and having one end portion passed through an angle of substantially 90* around said stop pin and wound upon said crank handle.
References Cited (Backward Citations)
US73019A
Cited
US2236305A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |