US978403A - Knockdown trestle. - Google Patents

Knockdown trestle. Download PDF

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Publication number
US978403A
US978403A US55284010A US1910552840A US978403A US 978403 A US978403 A US 978403A US 55284010 A US55284010 A US 55284010A US 1910552840 A US1910552840 A US 1910552840A US 978403 A US978403 A US 978403A
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legs
tenons
trestle
mortise
pair
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Expired - Lifetime
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US55284010A
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Henry Schott
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
    • B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
    • B25H1/06—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby of trestle type

Definitions

  • My invention relates to improvements in knockdown trestles and has for its object to provide means for so securing the supporting legs to the cross bar of the trestle that a very snug engagement between the same is accomplished; the pairs of legs at the same time being readily removed when so desired for convenience in storing and carrying the trestle.
  • FIG. l is a side view partially in section of my improved trestle with the cross bar and legs in their assembled position
  • Fig. 2 is an end view of the trestle
  • Fig. 3 is a detail view of one pair of legs in their folded position
  • Fig. 4 is a detail section taken in the plane of the line A-A of Fig. 1, looking in the direction of the arrows.
  • the cross bar of the trestle is denoted by 1, which cross bar is provided with mortises 2, each of which is fitted to receive the tenons 3, 4, of a pair of legs 5, 6, which legs are hinged together at 7. These tenons 3 and 4 are so cut as to leave lateral shoulders 8, 9, and outer longitudinal shoulders 10, 11, arranged to bear against the under side of the cross bar 1 when the legs are in position.
  • a spring 12 is interposed between the inner end wall of each mortise 2 and the tenons 3, 4, which spring tends to force the tenons snugly into engagement with the outer wall of the mortise.
  • This spring 12 is herein shown as secured to the cross bar 1 by means of a screw 13.
  • a spring 14 is interposed between each pair of legs 5, 6, above their hinged connection 7 the free end of which spring eX- tends upwardly between the tenons 3 and 4 tending to force the tenons apart and thus crowd them snugly into engagement with the side walls of the mortise 2.
  • This spring 14 may be secured to one of the legs, as, for instance, the leg 5 by a screw 15.
  • a trestle constructed as herein shown and described, may be readily knocked down for convenience in storing or carrying, and when the parts are assembled, all lost motion is taken by the springs and a very firm and rigid structure is provided.
  • a trestle comprising a cross bar having mortises therein, pairs of legs having tenons fitted to enter said mortises, each pair of legs being hinged together and a spring for each pair of legs tending to force the tenons apart against the side walls of the mortise.
  • a trestle comprising a cross bar having mortises therein, pairs of legs having tenons fitted to enter said mortises, each pair of legs being hinged together and a spring interposed between the tenons of each pair of legs above the hinge tending to force the tenons apart against the side walls of the mortise.
  • a trestle comprising a cross bar having mortises therein, pairs of legs having tenons fitted to enter said mortise, each pair of legs being hinged together and springs tending to force the tenons of each pair of legs into snug engagement with an end wall of the mortise and tending to force the tenons apart against the side walls of the said mortise.
  • a trestle comprising a cross bar having mortises therein, pairs of legs having tenons fitted to enter said mortises, each pair of legs being hinged together, a spring interposed between one end wall of the mortise and the tenons, tending to force the tenons into snug engagement with the other end wall of the mortise and a spring interposed between the tenons above the hinge tending to force the tenons apart against the side walls of the said mortise.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Special Chairs (AREA)

Description

H. SGHOTT.
KNOOKDOWN TRESTLE. APPLICATION mum APR. 1, 1910.
978,403. Patented Dec. 13, 1910.
HENRY SCHOTT, OF NEW YORK, N. Y.
KNOGKDOWN TRESTLE.
Specification of Letters Patent.
Patented Dec. 13, 1910.
Application filed April 1, 1910. Serial No. 552,840.
To all whom 'it may concern:
Be it known that I, HENRY Sonor'r, a subject of the German Emperor, and resident of the borough of Manhattan, in the city and State of New York, have invented a new and useful Improvement in Knockdown Trestles, of which the following is a specification.
My invention relates to improvements in knockdown trestles and has for its object to provide means for so securing the supporting legs to the cross bar of the trestle that a very snug engagement between the same is accomplished; the pairs of legs at the same time being readily removed when so desired for convenience in storing and carrying the trestle.
A practical embodiment or; my invention is represented in the accompanying drawings, in which Figure l is a side view partially in section of my improved trestle with the cross bar and legs in their assembled position, Fig. 2 is an end view of the trestle, Fig. 3 is a detail view of one pair of legs in their folded position, and Fig. 4 is a detail section taken in the plane of the line A-A of Fig. 1, looking in the direction of the arrows.
The cross bar of the trestle is denoted by 1, which cross bar is provided with mortises 2, each of which is fitted to receive the tenons 3, 4, of a pair of legs 5, 6, which legs are hinged together at 7. These tenons 3 and 4 are so cut as to leave lateral shoulders 8, 9, and outer longitudinal shoulders 10, 11, arranged to bear against the under side of the cross bar 1 when the legs are in position.
A spring 12 is interposed between the inner end wall of each mortise 2 and the tenons 3, 4, which spring tends to force the tenons snugly into engagement with the outer wall of the mortise. This spring 12 is herein shown as secured to the cross bar 1 by means of a screw 13.
A spring 14 is interposed between each pair of legs 5, 6, above their hinged connection 7 the free end of which spring eX- tends upwardly between the tenons 3 and 4 tending to force the tenons apart and thus crowd them snugly into engagement with the side walls of the mortise 2. This spring 14 may be secured to one of the legs, as, for instance, the leg 5 by a screw 15.
A trestle constructed as herein shown and described, may be readily knocked down for convenience in storing or carrying, and when the parts are assembled, all lost motion is taken by the springs and a very firm and rigid structure is provided.
\Vhat I claim is 1. A trestle comprising a cross bar having mortises therein, pairs of legs having tenons fitted to enter said mortises, each pair of legs being hinged together and a spring for each pair of legs tending to force the tenons apart against the side walls of the mortise.
2. A trestle comprising a cross bar having mortises therein, pairs of legs having tenons fitted to enter said mortises, each pair of legs being hinged together and a spring interposed between the tenons of each pair of legs above the hinge tending to force the tenons apart against the side walls of the mortise.
3. A trestle comprising a cross bar having mortises therein, pairs of legs having tenons fitted to enter said mortise, each pair of legs being hinged together and springs tending to force the tenons of each pair of legs into snug engagement with an end wall of the mortise and tending to force the tenons apart against the side walls of the said mortise.
4. A trestle comprising a cross bar having mortises therein, pairs of legs having tenons fitted to enter said mortises, each pair of legs being hinged together, a spring interposed between one end wall of the mortise and the tenons, tending to force the tenons into snug engagement with the other end wall of the mortise and a spring interposed between the tenons above the hinge tending to force the tenons apart against the side walls of the said mortise.
in testimony, that I claim the foregoing as my invention, I have signed my name in presence of two witnesses, this thirty-first day of March 1910.
' HENRY SCHOTT. Witnesses:
l (inouon BARRY, C. S. Sunncmcn.
US55284010A 1910-04-01 1910-04-01 Knockdown trestle. Expired - Lifetime US978403A (en)

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US55284010A US978403A (en) 1910-04-01 1910-04-01 Knockdown trestle.

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3139951A (en) * 1961-12-04 1964-07-07 Clayton William Support stand
US3529697A (en) * 1969-05-26 1970-09-22 Ernest F Kossian Collapsible saw horse
US4014405A (en) * 1975-06-30 1977-03-29 Breisch John H Knock-down sawhorse
US5628382A (en) * 1995-09-29 1997-05-13 Hill; Dennis R. Collapsible sawhorse
DE202015104137U1 (en) * 2015-08-07 2016-11-09 Horst Böhrs folding Bock

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3139951A (en) * 1961-12-04 1964-07-07 Clayton William Support stand
US3529697A (en) * 1969-05-26 1970-09-22 Ernest F Kossian Collapsible saw horse
US4014405A (en) * 1975-06-30 1977-03-29 Breisch John H Knock-down sawhorse
US4124093A (en) * 1975-06-30 1978-11-07 Jonvin Corporation Work-supporting device
US5628382A (en) * 1995-09-29 1997-05-13 Hill; Dennis R. Collapsible sawhorse
DE202015104137U1 (en) * 2015-08-07 2016-11-09 Horst Böhrs folding Bock

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