US2735166A - Hand hole forming method for cellular - Google Patents

Hand hole forming method for cellular Download PDF

Info

Publication number
US2735166A
US2735166A US2735166DA US2735166A US 2735166 A US2735166 A US 2735166A US 2735166D A US2735166D A US 2735166DA US 2735166 A US2735166 A US 2735166A
Authority
US
United States
Prior art keywords
hand hole
covering
duct
cellular
forming method
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
Publication date
Application granted granted Critical
Publication of US2735166A publication Critical patent/US2735166A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F19/00—Other details of constructional parts for finishing work on buildings
    • E04F19/08—Built-in cupboards; Masks of niches; Covers of holes enabling access to installations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49764—Method of mechanical manufacture with testing or indicating
    • Y10T29/49778—Method of mechanical manufacture with testing or indicating with aligning, guiding, or instruction

Definitions

  • This invention relates to cellular oor wire distributing systems and more particularly to hand hole forming method therefor.
  • FIG. 1 is a perspective view of a portion of a cellular iloor structure embodying the present invention
  • Figure 2 is a partial transverse sectional elevation of a duct and related structure
  • Figure 3 is a partial transverse sectional elevation of a duct and related floor structure, with a hand hole formed therein.
  • the floor is shown as constructed of preformed concrete slabs 1 having wire receiving cells 2 therein.
  • Crossover metal ducts 3 are provided in transverse relation to the cells 2.
  • Each duct has bottom openings 4 each communicating with a complementary opening 5 in the slab 1 leading to a respective cell 2.
  • a metal grommet 6 preferably lines the wall of the communicating openings, such grommet having a lower edge head 7 and an upper rounded edge flange 8 engaging the duct, such rounded edges permitting ease of movement of Wires through the grommet while preventing injury to the wires.
  • Knockouts 9 are provided in the upper wall of the duct 3, each knockout having a diameter approximately equal to that of the desired hand hole. Each knockout is formed in the usual manner by partially severing the wall of the duct along the line 10. Mounted axially in each knockout is a removable marker such as a grub screw 11.
  • the oor is provided with the customary top ill 12 of cementitious or like material, the upper surface of which is preferably tiush with that of the upper wall of duct 3.
  • the floor covering 13 of linoleum or the like is then applied to the iloor as by the layer of adhesive 14.
  • the covering 13 is punctured to expose the head of the screw, which is adjusted to lie ilush with the surface of the covering.
  • a knockout 9 in the required location is immediately identitied by means of its marker 11. With the center of the knockout thus clearly determined, it is a simple matter to scribe a circle on the floor covering the exact size desired to form the required hand hole. Severing of the scribed covering disc and removal of the underlying knockout is then readily eifected.
  • a threaded peripheral ring 15 is preferably applied to the opening in the duct as by screws 16 or the like, such ring being adapted to receive a threaded cover disc 17, which may be conveniently removed and applied as desired.
  • the disc 17 is preferably formed with a shallow circular recess 1S in its upper surface to receive a disc 19 of floor covering of complementary size.
  • a method of forming a hand hole in a iloor duct concealed by a preformed floor covering which comprises identifying a circular knockout portion in said duct by applying a marker to the axis of said portion prior to laying of said floor covering puncturing said covering by the marker to provide a visible indication of the axis of said portion, said marker projecting upwardly from said knockout portion a distance not substantially greater than the thickness of the floor covering subsequently scribing a circle on said covering about said axis, and then removing the scribe-enclosed covering portion and the underlying knockout portion to form the hand hole and applying a separable hand hole cover structure to said hand hole.
  • a method of forming a hand hole in a oor duct concealed by a linoleum covering which comprises identifying a circular knockout portion in said duct by applying a grub screw to the axis of said portion prior to the laying of said linoleum covering, puncturing said covering by the grub screw to provide a visible indication of the axis of said portion, said screw projecting upwardly from said knockout portion a distance not substantially greater than the thickness of the lineolum covering, subsequently scribing a circle on said covering about said axis, removing the scribe-enclosed covering portion and the underlying knockout portion to form the hand hole, fixing a threaded ring to the periphery of said hand hole, applying to said ring a recessed, threaded cover disc and fixing in the recess of said cover disc, a portion of said linoleum covering to be substantially flush with the surface of said linoleum covering.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Duct Arrangements (AREA)

Description

Feb. 2l, 1956 J. HOSEASON 2,735,166
HAND HOLE FORMING METHOD FOR OEE u AR O FLOOR WIRE OISTRIEUTING sYsTE Filed Aug. e, 1955 IN V EN TUR. Harry J /sea san United States Patent O HAND HOLE FORMING METHOD FOR CELLULAR FLOOR WIRE DISTRIBUTING SYSTEMS Harry J. Hoseason, Toronto, Ontario, Canada Application August 6, 1953, Serial No. 372,666
2 Claims. (Cl, 29-467) This invention relates to cellular oor wire distributing systems and more particularly to hand hole forming method therefor.
In such systems, it is usual to provide Wire containing cells with ducts extending transversely of the cells. Each duct has communication with one or more of the cells over which it passes and access to the duct from the floor surface must be provided. Usually, a floor covering, such as linoleum is laid directly over the ducts and, While the location of the ducts is known, it will be apparent that accurate measurements are necessary before cutting through the oor covering to produce a hand hole in any chosen duct.
It is an object of this invention to provide a method for quickly, accurately and neatly producing hand holes in covered ducts for floor wire distributing systems.
This invention will be described with reference to the accompanying drawing, in which Figure 1 is a perspective view of a portion of a cellular iloor structure embodying the present invention,
Figure 2 is a partial transverse sectional elevation of a duct and related structure, and
Figure 3 is a partial transverse sectional elevation of a duct and related floor structure, with a hand hole formed therein.
In the drawing, the floor is shown as constructed of preformed concrete slabs 1 having wire receiving cells 2 therein. Crossover metal ducts 3 are provided in transverse relation to the cells 2. Each duct has bottom openings 4 each communicating with a complementary opening 5 in the slab 1 leading to a respective cell 2. A metal grommet 6 preferably lines the wall of the communicating openings, such grommet having a lower edge head 7 and an upper rounded edge flange 8 engaging the duct, such rounded edges permitting ease of movement of Wires through the grommet while preventing injury to the wires.
Knockouts 9 are provided in the upper wall of the duct 3, each knockout having a diameter approximately equal to that of the desired hand hole. Each knockout is formed in the usual manner by partially severing the wall of the duct along the line 10. Mounted axially in each knockout is a removable marker such as a grub screw 11.
The oor is provided with the customary top ill 12 of cementitious or like material, the upper surface of which is preferably tiush with that of the upper wall of duct 3. The floor covering 13 of linoleum or the like is then applied to the iloor as by the layer of adhesive 14.
With the head of the grub screw 11 in elevated position, as shown in Figure 2, the covering 13 is punctured to expose the head of the screw, which is adjusted to lie ilush with the surface of the covering.
When it is desired to provide a hand hole in the duct, a knockout 9 in the required location is immediately identitied by means of its marker 11. With the center of the knockout thus clearly determined, it is a simple matter to scribe a circle on the floor covering the exact size desired to form the required hand hole. Severing of the scribed covering disc and removal of the underlying knockout is then readily eifected.
A threaded peripheral ring 15 is preferably applied to the opening in the duct as by screws 16 or the like, such ring being adapted to receive a threaded cover disc 17, which may be conveniently removed and applied as desired. The disc 17 is preferably formed with a shallow circular recess 1S in its upper surface to receive a disc 19 of floor covering of complementary size.
I claim:
1. A method of forming a hand hole in a iloor duct concealed by a preformed floor covering which comprises identifying a circular knockout portion in said duct by applying a marker to the axis of said portion prior to laying of said floor covering puncturing said covering by the marker to provide a visible indication of the axis of said portion, said marker projecting upwardly from said knockout portion a distance not substantially greater than the thickness of the floor covering subsequently scribing a circle on said covering about said axis, and then removing the scribe-enclosed covering portion and the underlying knockout portion to form the hand hole and applying a separable hand hole cover structure to said hand hole.
2. A method of forming a hand hole in a oor duct concealed by a linoleum covering which comprises identifying a circular knockout portion in said duct by applying a grub screw to the axis of said portion prior to the laying of said linoleum covering, puncturing said covering by the grub screw to provide a visible indication of the axis of said portion, said screw projecting upwardly from said knockout portion a distance not substantially greater than the thickness of the lineolum covering, subsequently scribing a circle on said covering about said axis, removing the scribe-enclosed covering portion and the underlying knockout portion to form the hand hole, fixing a threaded ring to the periphery of said hand hole, applying to said ring a recessed, threaded cover disc and fixing in the recess of said cover disc, a portion of said linoleum covering to be substantially flush with the surface of said linoleum covering.
References Cited in the file of this patent UNITED STATES PATENTS 1,533,759 Richardson Apr. 14, 1925 2,113,675 Brown Apr. 12, 1938 2,266,610 Martin Dec. 16, 1941 2,594,810 Schaub Apr. 29, 1952 2,620,080 Tomlin Dec. 2, 1952 2,666,546 Reilly Jan. 19, 1954
US2735166D Hand hole forming method for cellular Expired - Lifetime US2735166A (en)

Publications (1)

Publication Number Publication Date
US2735166A true US2735166A (en) 1956-02-21

Family

ID=3444580

Family Applications (1)

Application Number Title Priority Date Filing Date
US2735166D Expired - Lifetime US2735166A (en) Hand hole forming method for cellular

Country Status (1)

Country Link
US (1) US2735166A (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2841280A (en) * 1954-05-06 1958-07-01 Bulova Watch Co Inc Package for watch main-spring
US2900101A (en) * 1957-09-30 1959-08-18 Gen Electric Finished cover for underfloor junction box
US2913136A (en) * 1957-01-29 1959-11-17 Porter Co Inc H K Junction box for underfloor conduit and duct systems for cellular floors
US2936092A (en) * 1958-01-06 1960-05-10 Porter Co Inc H K Flush linoleum pan for headerduct outlet
US3263580A (en) * 1964-05-26 1966-08-02 James G Macmillan Safety adaptor for manholes
US3603048A (en) * 1970-04-02 1971-09-07 Textron Inc Carpet-underfloor adapter
US3772841A (en) * 1969-11-24 1973-11-20 A Barak Method of constructing indoor or patio green and a plug for the golf cup thereof
US4637181A (en) * 1983-06-01 1987-01-20 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Elevated waterproof access floor system and method of making the same
US20060070314A1 (en) * 2004-10-06 2006-04-06 Connor Sport Court Int'l., Inc. Tile with multiple-level surface
US20070044412A1 (en) * 2003-06-24 2007-03-01 Forster Cheryl M Interlocking floorboard tile system and method of manufacture
US20090235605A1 (en) * 2004-10-06 2009-09-24 Thayne Haney Method of Making A Modular Synthetic Floor Tile Configured For Enhanced Performance
US20100236176A1 (en) * 2004-02-25 2010-09-23 Connor Sport Court International, Inc. Modular Tile With Controlled Deflection
US20100247984A1 (en) * 2009-03-27 2010-09-30 Sanyo Electric Co., Ltd. Sealed cell
US7849642B2 (en) 2004-03-12 2010-12-14 Connor Sport Court International, Inc. Tile with wide coupling configuration and method for the same
US8407951B2 (en) 2004-10-06 2013-04-02 Connor Sport Court International, Llc Modular synthetic floor tile configured for enhanced performance

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1533759A (en) * 1924-07-12 1925-04-14 Henry F Richardson Junction box
US2113675A (en) * 1936-04-22 1938-04-12 Charles S Brown Method of forming electrical conduit coutlet boxes
US2266610A (en) * 1940-05-18 1941-12-16 Smith Corp A O Hot water tank connection
US2594810A (en) * 1949-06-15 1952-04-29 Erwin L Schaub Method of relining worn bearing surfaces
US2620080A (en) * 1949-04-18 1952-12-02 Frederick M Tomlin Guard and locater for electrical outlet boxes
US2666546A (en) * 1951-04-17 1954-01-19 Norman A Reilly Outlet box locator

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1533759A (en) * 1924-07-12 1925-04-14 Henry F Richardson Junction box
US2113675A (en) * 1936-04-22 1938-04-12 Charles S Brown Method of forming electrical conduit coutlet boxes
US2266610A (en) * 1940-05-18 1941-12-16 Smith Corp A O Hot water tank connection
US2620080A (en) * 1949-04-18 1952-12-02 Frederick M Tomlin Guard and locater for electrical outlet boxes
US2594810A (en) * 1949-06-15 1952-04-29 Erwin L Schaub Method of relining worn bearing surfaces
US2666546A (en) * 1951-04-17 1954-01-19 Norman A Reilly Outlet box locator

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2841280A (en) * 1954-05-06 1958-07-01 Bulova Watch Co Inc Package for watch main-spring
US2913136A (en) * 1957-01-29 1959-11-17 Porter Co Inc H K Junction box for underfloor conduit and duct systems for cellular floors
US2900101A (en) * 1957-09-30 1959-08-18 Gen Electric Finished cover for underfloor junction box
US2936092A (en) * 1958-01-06 1960-05-10 Porter Co Inc H K Flush linoleum pan for headerduct outlet
US3263580A (en) * 1964-05-26 1966-08-02 James G Macmillan Safety adaptor for manholes
US3772841A (en) * 1969-11-24 1973-11-20 A Barak Method of constructing indoor or patio green and a plug for the golf cup thereof
US3603048A (en) * 1970-04-02 1971-09-07 Textron Inc Carpet-underfloor adapter
US4637181A (en) * 1983-06-01 1987-01-20 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Elevated waterproof access floor system and method of making the same
US20070044412A1 (en) * 2003-06-24 2007-03-01 Forster Cheryl M Interlocking floorboard tile system and method of manufacture
US8955268B2 (en) 2004-02-25 2015-02-17 Connor Sport Court International, Llc Modular tile with controlled deflection
US20100236176A1 (en) * 2004-02-25 2010-09-23 Connor Sport Court International, Inc. Modular Tile With Controlled Deflection
US8596023B2 (en) 2004-02-25 2013-12-03 Connor Sport Court International, Llc Modular tile with controlled deflection
US7849642B2 (en) 2004-03-12 2010-12-14 Connor Sport Court International, Inc. Tile with wide coupling configuration and method for the same
US20060070314A1 (en) * 2004-10-06 2006-04-06 Connor Sport Court Int'l., Inc. Tile with multiple-level surface
US8397466B2 (en) 2004-10-06 2013-03-19 Connor Sport Court International, Llc Tile with multiple-level surface
US8407951B2 (en) 2004-10-06 2013-04-02 Connor Sport Court International, Llc Modular synthetic floor tile configured for enhanced performance
US20090235605A1 (en) * 2004-10-06 2009-09-24 Thayne Haney Method of Making A Modular Synthetic Floor Tile Configured For Enhanced Performance
US20100247984A1 (en) * 2009-03-27 2010-09-30 Sanyo Electric Co., Ltd. Sealed cell

Similar Documents

Publication Publication Date Title
US2735166A (en) Hand hole forming method for cellular
US2930504A (en) Electrical junction box
US3603048A (en) Carpet-underfloor adapter
US3303264A (en) Dual service conduit and outlet system
US3029964A (en) Junction box for underfloor wiring system
US6209214B1 (en) Combination template/level for installing utility boxes
US20100095543A1 (en) Tool for Installing an Electrical Outlet Box
US20080006624A1 (en) Frame for a wall cut-out
US2672749A (en) Wire distributing cellular metal floor
US3343704A (en) Electrical outlet box
GB2100329A (en) Apparatus for obtaining a test core
US2931533A (en) Wire distributing apparatus
US4899506A (en) Large capacity electrical service fitting for concrete floors
US3081896A (en) Closures for access openings and method of using the same
US1758126A (en) Outlet locator
US2929529A (en) Terrazzo holder for under-floor junction box
US2830662A (en) Wallboard cutter for outlet boxes
US2619828A (en) Wire distributing cellular metal floor
US3187922A (en) Flush pans
US3199713A (en) Adapter for access units of underfloor ducts
EP3511483A1 (en) Waterproof panel for shower tray
US4012873A (en) Protective cap for underfloor access housing
US2207301A (en) Underfloor duct
US5598638A (en) Electrical stick
US1758989A (en) Underfloor duct system and method of making