US1852448A

US1852448A - Stake for logging bunks

Info

Publication number: US1852448A
Application number: US433005A
Authority: US
Inventors: Frederick W Chriswell
Original assignee: Pacific Car and Foundry Co
Current assignee: Paccar Inc
Priority date: 1930-03-04
Filing date: 1930-03-04
Publication date: 1932-04-05
Anticipated expiration: 1949-04-05

Description

April 5, 1932. ,F. w. cHRlswL-:LL

STAKE FOR LOGGING BUNKS Filed March 4, 195o e ,222/ MNN.

Patented Apr. 5, 1932 PATENT OFFICE nm Wm-um .FREDERICK W. CHRISWELL, OF SEATTLE, WASHINGTON, ASSIGNOR T PACIFIC CAR AND FOUNDRY COMPANY, OF SEATTLE, WASHINGTON, A CORPORATION OF 'WASH-` y on to the car. l0

INGTON STAKE FOR LOGGING BUNKS Application inea March 4,

This invention relates to stakes for logging bunks and more particularly to a means for holding the stakes in upright position. ln service it is frequently necessary to fold the stakes down upon the bunks in order that the car may pass beneath, the loading device and in loading it often happens that the stakes are struck by a log as the log is swung Nhere the stakes are fixed in upright position the car is not suitable for use with those types of loading devices which require that the st-akes be lowered on to the bunks and the stakes or bunks are often damaged when the stakes are struck by logs is also an object of this invention to provide yielding means for holdingthe stakes in upright position which will permit of the stakes being folded down upon the bunks by a pressure or blow insufficient to injure the stakes y or bunks and which will not interfere with the usual operation of the stakes outwardly from the cars in the discharging of the logs from thecars.

With these and other objects in view as i will appear more fully herein after, the invention consists substantially in the construction, combination. location and relativearrangement of the parts, all as will be more fully herein set forth, as shown in the accompanying drawings and finally pointed out in the appended claims. y

In the drawings Fig. 1 is a side elevation of a logging bunk of suitable type with stakes applied to each end thereof and equipped with means for retaining the stakes in upright position constructed in accordance with this invention; and

Fig. 2 is a top plan view drawn to a larger scale of a portion of one end of the structure shown in Fig. 1; and

Fig. 3 is a horizontal section showing the 1930. Serial No. 433,005..

application of the means `for retaining the stake in upright position, the stake being shown folded down on to the bunk; and

Fig. 4 is a fragmentary view showing in elevation the lower portion of the stake. In the drawings the invention is shown in connection with a `bunk formed of pair of spaced parallel rails l mounted upon an underframe 2 (shown in broken lines) and having stakes 4 pivotally mounted at each end of the bunk. The stakes are restrained from movement outwardly of the carby chains 6 which have ends pivotally attached to ears or lugs 8 attached to the rails l, pass over shoulders 10 on the stakes 4 and extend through eyes 12 attached to the opposite rails 1 and to the-far ends of the bunk where links of the chains 6 'engage with lugs 16 attached to the rails 1 and the ends of the chains are attached to hooks 18 formed integral withthe lugs 16. As shown the stake is prevented from movement outwardly by the engagement of links of the chains 6 with the lugs 16 and when it is desired to discharge the logs from the car the chains 6 are disengaged from the lugs 16 and allowed to run through the eyes 12 and over the shoulders 10 as the logs force the stakes of one side of the car outwardly of the car. The chains 6 are arranged so that the stakes 4 are controlled from the opposite sides of the car.

Whilethe chains 6 prevent the stakes 4 from moving outwardly of the car, it is desirable to restrain the stakes 4 from movement inwardly `of the car while permitting the stakes to be readily folded down upon the bunk when desired. To restrain the stakes against inward movement there is provided at each end of the bunk ahousing 9.() attached to one of the railsv 1 by a bolt 22 and by the pin 24 upon which this stake 4 is mounted. In the housing 20 is a plunger 26 having a tapered end 9.8 and provided with a shoulder 30 which is engaged by a spring 32 confined between the housing 20 and the shoulder 30 and which serves to press the plunger toward the stake. Between the stake 4 and the inner surfaces of the rails 1 are placed end fillers 34 secured to the rails by rivets 36 which secure the lugs 16 to the rails 1 and by rivets 38. The pivot pin 24 upon which the stake 4 is mounted also extends through bothend illers and through the base of the lugs 16 and is readily accessible in case repair or replacement of the stake is necessary. 'Each stak-e 4 is, as shown in Fig. 4, enlarged at its end where it engages with the pivot pin 24 and is provided with a beveled or inclined surface 4() which is so placed on the stake 4 that when the stake is in its upright position the surface 40 will be engaged by the tapered end 28 of the plunger 26, the inclination of the surface 40 and of the end of the plunger 26 being the same so that Ythe surfaces will engage. The above described construction constitutes a spring detent controlled in its action by movement of the stake. The engagement of the

surfaces

28 and 40 forms a means by which the stake 4 when in raised position is restrained from pivotal movement inwardly of the car to fold down upon the bunk but whenever sutlicient pressure is'applied to the stake 4 either intentionally or by a blow by a log the inclined surface 40 of the stake 4 will force back the plunger 26 against the action of the spring 32 and the stake will fold down to the position shown in Fig. 3 in which position the end surface of the plunger 26 bears against the side face of the stake. In order to permit of a free movement outwardly of the stake when the stake is released the stake is cut away or chamfered as at 42 so that the stake will clear the plunger 26 when the stake is moved outwardly and the plunger will be left in its forward position.

In the operation of this device with the stake in raised position, the plunger 26 will yieldingly retain the stakein its raised position against pivotal movement inwardly of the car but uponthe application of suitable pressure to the stake the plunger will be forced back by the stake and the stake will assume the dropped position on the bunk. Vith the stake in raised position the stake may, when the retaining chain 6 is released, pivot outwardly of the car free of interfen ence by the plunger 26.

Vhile the preferred form of the invention has been shown and described it is to be un derstood that the invention is not limitedto the exact details of construction shown and described as it is obvious that various modi'- flcations thereof within the scope of the claims will occur to persons skilled in the art.

Vhat is claimed is:

1. In a logging car, a bunk, a stake pivotally mounted thereon to swing transversely of the car and means Ayieldingly holding said stake against movement inwardly of said car while permitting free movement out# wardly of said car.

2. In a logging car, a bunk, a stake pivotally mounted thereon, a chain associated with the bunk and connected tothe stake intermediate its extremities to rigidly prevent movement of the stake in one direction and a spring pressed plunger retaining said stake in upright position.

3. In a logging car, a bunk, a stake pivotally mounted thereon and a spring pressed plunger, said plunger engaging said stake to retain said stake against pivotal movement inwardly of said car while permitting free outward movement of said stake.

4. In a logging car, a bunk comprising spaced rails, a stake pivotally mounted between said rails, and a spring pressed plunger mounted on one and only one of said rails and engaging said stake.

5. In a logging car, a bunk comprising placed rails, a stake pivotally mounted between said rails, a housing carried by one of said rails, and a spring pressed plunger mounted in said housing and engaging said stake.

6. In a logging car, a bunk comprising spaced rails, a stake pivotally mounted between said rails, and a spring pressed plunger carried by one of said rails and engaging said stake, said plunger and stake having cooperating surfaces wherebysaid `stake may retract said plunger to move 1n one dlrection.

7. In a logging car, a bunk comprising spacedrails, a stake pivotally mounted .be-

tween said rails and a spring pressed plunger yieldingly holdingsaid stake against movement in one direction, said stake being shaped to permit free movement in the opposite direction past said plunger. Y

8. In a logging car, a bunk comprising spaced rails, a stake pivotally mounted between said rails and a spring pressed plunger mounted on one of said rails,v said plunger having a tapered end and said stake having a correspondingly inclined cooperating surface whereby saidplunger yieldingly holds said stake against movement in one direction.

9. In a logging car. a bunk comprising spaced rails. a stake "pivotally mounted between said rails and a spring pressed plunger mounted on one of said rails, said plunger having a tapered end Vand said stake having a correspondingly inclined cooperating surface whereby said plunger yieldingly holds said stake against movement in one direction and said stake retracts said plunge er upon application of pressure-to force said stake to move in that direction.

10. In a'logging car, a bunk, a stake pivotallv mounted thereon, a spring pressed member active when the stake is in upright position to resist movement thereof in one direction and allow free movement thereof in the opposite direction and means adapted to overcome the spring action by pressure on the stake.

1l. In a logging car` a bunk, a stake pivotally mounted thereon, a spring detent the action of which is controlled by pressure on and movement of the stake, said detent being active when the stake is in upright lposition to resist inward pivotal movement t ereof yet allowing outward pivotal movement of said stake.

l2. In a logging car, a bunk, a stake pivotally mounted thereon, a spring detent the action of which is controlled by pressure on and movement of the stake, said detent being active when the stake is in upright position to resist inward pivotal movement thereof yet allowing outward pivotal movement of said stake, and other means for holding the stake against outward pivotal movement.

13. In a logging car, a bunk, a pivotally mounted stake, and a spring detent on the bunk acting on the stake to sustain its weight against tendency to move inwardly; said de tent being constructed and arranged to be overcome by pressure applied to the stake, and being held inactive by the stake until the return of the latter to its upright position.

In Witness whereof I have hereunto set my hand.

FREDERICK W. CHRISWELL.