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Publication numberUS781994 A
Publication typeGrant
Publication dateFeb 7, 1905
Filing dateJun 28, 1904
Priority dateJun 28, 1904
Publication numberUS 781994 A, US 781994A, US-A-781994, US781994 A, US781994A
InventorsReinhold Boltze
Original AssigneeReinhold Boltze
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 781994 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

PATENTBD PEB. 7, 1905.




Patented February '7, 1905.



SPECIFICATION forming part of Letters Patent No. 781.994, dated February 7, 1905. Application filed June 28, 1904. Serial No. 214,552.

l?) f/// 1x1/wm, it rit/ty Concern:

Be it known that I, REINHOLD BOLTZE, farmer, a subject ot' the Grand Duke of' Saxe- 1V eimar, residing at llveimar, German Empire. have inventedcertain new and useful Improvements in Carriage-Poles, of which the Vfollowingl is a specification.

My invention relates to an improved carriage-pole in which provision is made for lessening the shocks caused to the draft-animals when stopping or from the oscillation of the pole.

In carrying the invention into effect a spring' l of suitable f'orm is incased in the end of' the pole, which spring' is connected with a crosspiece with two eyes for the reception ot' the pole-chains. The cross-piece is capable of' sliding axially in the end ot' the pole and may or may not be arranged to revolve at the same time and is acted upon by the spring, s that when thehorses are checkingthe vehicle in descending downhill or when suddenly stopped or when the pole oscillates the shocks which hitherto acted in a distressing manner on the withers and forelegs of the animals are mitigated or entirely taken up by the elasticity of the spring.

The annexed drawings show various forms of the invention.

Figures 1 and Q are longitudinal sections showing the spring extended and under compression. Fig. 3 is a section on line A B, Fig. 2. Fig. i is a longltudinal sectlon of an alternative arrangement with springI extended. Fig. 5 is a similar view with the spring compressed. Fig'. 6 is a longitudinal section of a further modification. Fig. 7 is a transverse section on line B C, Fig. 6. Fig. 8 is a transverse section illustrating an alternative form of pin to that illustrated in Fig'. 6.

Referring to Figs. 1 to 3, there are shown a cross-piece 1, with two eyes or rings for the reception otl the pole-chains, and a spring 2, acting upon it, arranged in a cap or box 4, fitted on the fore end of the pole 3, the spring' 2 being in this instance in the form of' a buf'- Vfer-spring inserted between the fore end ot' the pole itself and the cross-piece. The crosspiece 1 is provided with eyes 5 for the reception ofl the pole-chains placed diametrically opposite to each other and 'is shaped circularly where contained within the capfl and projecting on either side through longitudinal slots 6 in the cap 1. 1n the center the cross-piece 1 has a guide-pin7otl round, angular, or other suitable cross-section, which slides within a recess 8 in the fore end ot' the pole. ln addition the cross-piece 1 has a sleeve-like extension 9 projecting backward and which serves as a guide sliding within the cap a. In order to permit the guide-sleeve 9 to recede upon the pole 3 while the springe is under tension, the pole is recessed at the end at 10 fora suitable distance. In order to permit convenient insertion of' the parts arranged within the cap 4, the latter is provided at its front end with a cover-plate 11, arranged to screw into the cap. Between this cover and the cross-piece 1 a sof't elastic disk or washer of' felt, rubber, asbestos, or the like is inserted to take up the thrust and prevent any noise when the crosspiece 1 strikes against the cover on the reexpansion of' the spring after compression. Similarly the rear end of' the spring rests on an elastic disk or washer 13, arranged upon the end face of' the pole. 1fl while the carriage is ruiming downhill the animals are checking the vehicle or if` at any time the vehicle is suddenly stopped or ii the pole oscillates, the jerks and thrusts are taken up by the elasticity of the spring 2, so that they will either act but slightly on the pole-chains or not be f'elt at all by the animals.

Figs. 4 and 5 show another form ofl my invention with the spring in a state ofl compression and in which Af'orm the spring?. is placed in front of the cross-piece 1. In this instance the front end of the spring 2 carries a sleeve 15, fitted with a fiange le and connected with the cross-piece 1 by chains or some other means ot' connection 16. The cross-piece 1 is placed at the back of' a partition 17, fitted with an elastic disk or washer 18 in the cap 4, which, as before, is provided with longitudinal slots 6, and this partition 17 is connected with the cover-plate 11 by a central guide-pin. lVhen the spring is compressed, the sleeve 15 will slide on the pin 19. Between the cover-plate l11 and the flange 14 of the guide-sleeve 15 an elastic packing or washer 20 is likewise provided.

While in the forms shown in Figs. 1 to 5 the cross-piece 1 is inclosed in the cap, its eyes 5 only (for the reception of the pole-chains) projecting from the cap 4, the cross-piece 1 in the form of construction shown in longitudinal section in Fig. 6 is arranged entirely exposed on a central guide-pin 7. Approximately in the middle of its length this pin is provided with a stop-disk 21. Between this latter and the forel end of the pole the spring 2 is inserted. While the spring is compressed the rear end of the pin 7, which at this point is round, slides in a central bore 8. The front end of the pin is either likewise round or, as shown in Figs. 7 and 8, either of angular or elliptical form. The front end of the guidepin 7 is carried loosely through the coverplate 11, screwed into the cap, and between this cover-plate and the stop-disk 21 the elastic disk or washer 1Q is arranged for the same purpose as in the forms previously described. Similarly the elastic disk or washer 13 is provided between the rear end of the spring' 2 and the front end of the pole 3. As will be readily seen in this form, it is not necessary to provide the cap 4, which serves as the receptacle for spring 2, with slots for the passage of the two arms of the cross-piece carrying the eyes 5. In all cases the cap 4 is rigidly and immovably fixed to the fore end of the pole.

It may be mentioned that, if desired, the cross-piece 1 may be arranged on the guidepin 7 with liberty to oscillate horizontally.

Having now particularly described and Eascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is- 1. In a device of the class set forth, the combination with a pole, an inclosing means on the fore end of the same, a cross-piece movably cooperating with the said inclosing means and having devices for attachment of polechains, and a resilient device cooperating with the cross-piece.

2. In a device of the class set forth, the combination with a pole, of an inclosure applied to the fore end thereof, a cross-piece slidably cooperating with said inclosure, and a resilient means engaging the cross-piece, the crosspiece being provided with devices for attachment of pole-chains or the like.

3. In a device of the class setforth, the combination with a pole, of an inclosure iitted over the fore end of the pole, a cross-piece cooperating with the inclosure and having means for attachment thereto of pole-chains or the like, and a resilient device bearing upon a part of the cross-piece, the latter being longitudinally slidable.

4. In a device of the class set forth, the combination with a pole, of an inclosure applied to the fore end thereof, a slidable cross-piece having a stem member movable in the inclosure, and a resilient means within the inclosure through which the stem member movably projects.

5. In a device of the class set forth, the cornbination with a pole, of an inclosure applied to the fore end thereof and having slots therein at diametrically opposite points, a crosspiece engaging the said slots and having terminal means for attachment of pole-chains or the like, and a spring cooperating with the cross-piece in the manner set forth.

6. In a device of the class set forth, the combination witha pole, of an inclosure fitted on the fore end of the pole and having diametrically opposed slots, a cross-piece having the terminals thereof movabl y projecting through the slots and provided with means for attachment of pole-chains or the like, and a spring cooperating with the cross -piece, the said spring being of volute form and compressible into compact condition.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.



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US7181821Jul 17, 2003Feb 27, 2007Shell Oil CompanyJoining expandable tubulars
US7774917Nov 7, 2006Aug 17, 2010Tubefuse Applications B.V.Forge welding tubulars
Cooperative ClassificationB62C5/02