US3790921A - Electric connecting device for an encased refrigerating machine - Google Patents

Electric connecting device for an encased refrigerating machine Download PDF

Info

Publication number
US3790921A
US3790921A US00198205A US3790921DA US3790921A US 3790921 A US3790921 A US 3790921A US 00198205 A US00198205 A US 00198205A US 3790921D A US3790921D A US 3790921DA US 3790921 A US3790921 A US 3790921A
Authority
US
United States
Prior art keywords
spring
casing
cap
housing assembly
cover
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
US00198205A
Other languages
English (en)
Inventor
E Nielsen
H Pedersen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Danfoss AS
Original Assignee
Danfoss AS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Danfoss AS filed Critical Danfoss AS
Application granted granted Critical
Publication of US3790921A publication Critical patent/US3790921A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B31/00—Compressor arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—Component parts or details not otherwise provided for in this subclass
    • F25B2400/07—Details of compressors or related parts
    • F25B2400/077—Compressor control units, e.g. terminal boxes, mounted on the compressor casing wall containing for example starter, protection switches or connector contacts

Definitions

  • the invention relates to an electrical housing assembly for a refrigeration machine which attaches to the casing wall of the refrigeration machine.
  • the housing assembly encloses a plug element which is mounted on insulated guide pins which extend through the casing wall.
  • the housing assembly comprises a plastic box which surrounds the plug element and a U-shaped spring for attaching the cover to the casing wall.
  • Attaching means for the spring include guide trackelements having hooking edges which facilitate the easy snapping of the spring into and out of its attached position.
  • the invention relates to an electric connecting device for an encased refrigerating machine, which device comprises a plug element carrying a terminal and mounted on guide pins which extend through and are insulated against the casing wall, a holder secured to the casing, and a cap which covers the plug element and is detachably applied to the holder by means of a fixing element.
  • the cap prevents contact with the electrical components. It is secured to a complementary holder by means of at least one screw.
  • the holder consists of a shaped sheet-metal part securely welded to the casing.
  • the screw has been considered to be necessary so that the cap does not become detached as a result of the continuous vibration of the casing.
  • the fitting and removal of the cap however causes difficulties particularly when, as is the usual practice, the casing has already been fitted in a cold cabinet and is not therefore fully accessible.
  • the screw has to be introduced into the associated tapped part and can easily get lost. If it is located at a point difficult of access, the large number of turns of the screw-driver necessary for tightening and loosening the screw, as well as the need for fully tightening it cause considerable trouble.
  • the object of the invention is to provide an electric connecting device of the initially stated kind which can be attached and released considerably more easily but nevertheless ensures that the cap fits securely on the casing.
  • the fixing element being constituted by a substantially U-shaped spring which straddles the cap, engages behind stop faces on the holder by means of outwardly bent hooks at its free ends, and has a central web which resiliently urges the cap against an abutment surface on the casing, by the side walls of the cap incorporating a guide track for the limbs of the spring, said track being provided with a bridge element, and by the limbs of the spring each incorporating an outwardly directed projection which is at some distance from the hook and which is located between the bridge element and the holder in the locked position.
  • the cap can be withdrawn.
  • the release of the spring can be achieved by for example pushing the flat tip of a screwdriver between the bridge element and a limb of the spring and then turning the screw-driver slightly about its longitudinal axis.
  • the limb of the spring can of course also be engaged at some other point and pressed inwards.
  • each projection is at a distance from the hook that is greater than the width of the bridge element.
  • the projection can have already moved out of the bridge element again. The result of this is that the hook moves outwards, and the curved spring is prevented from falling out of the cap. The fixing element cannot therefore get lost.
  • each limb of the spring each embody an angled portion, between the projection and the central web, that bears against the side wall of the cap.
  • these angled portions ensure that each hook is not only pressed inwards but is even turned inwardly and can therefore be guided into the latching position in an unrestricted manner.
  • each angled portion forms a solid backing element which increases the expanding force for effecting latching, since the spring arm between the hook and the backing element is shorter than the limb of the spring as a whole.
  • the inner wall of the bridge element extends obliquely inwards towards the open side of the cap. In this way, a gradual increase in friction is achieved so that the greatest force can be applied only just before the latching position is reached.
  • the guide track may extend obliquely outwards in the direction of the openside between the base of the cap and the bridge element. This again leads to a gradual increase in friction.
  • the spring When the spring is fitted for the first time, the books can easily pass over this inclined face. Finally, when the spring is released, the angled portions of its limbs are guided inwards along these inclined faces into the position in which the spring is relieved of tension, so that the movement of the spring away from the casing is aided.
  • the spring is made of steel strip.
  • Steel strip can be readily bent into the required shape, and.
  • FIG. l shows the connecting device of the invention in the assembled condition
  • FIG. 2 is a cross-section through the connecting device at the level at which the fixing spring is positioned, the spring being seen in its outer position
  • FIG. 3 is a simplifed illustration corresponding to FIG. 2, but with the spring aboutto move into the latching position, and
  • FIG. 4 provides a similar illustration to that of FIG. 3, but with the spring located in the latching position.
  • a plug element 5 which is illustrated in broken lines in FIG. 2; the plug element, apart from embodying terminals for connecting the external supply lead, may alsoincorporate a starting relay and an excess temperature protective cutout.
  • a holder 6 which comprises stop faces 8 provided on each of two bent-up tabs 7.
  • a terminal 9 for the earth wire is also provided on the holder.
  • the plug element 5 is covered by a cap 10 which is urged by means of a U-shaped spring 11 of strip material towards a bearing face secured to or constituted by the cap.
  • the spring is held in a guide track 12 which is straddled by a bridge element 13.
  • the spring 11 consists of a central web 14 which has a median bearing face which slopes upwards towards the corners 15.
  • Each limb 16 of the spring incorporates an angled portion 17 whereby it bears against the cap 10, a projection 18 and, at its free end, a hook 19.
  • the inner surface of the bridge element 13 is inwardly inclined towards the open end of the cap 10, and outside the bridge element the surface of the cap is outwardly inclined in a portion 21 towards the open side of the cap.
  • the distance between each projection 18 and each hook 19 is greater than the width of the bridge element.
  • each limb 16 is pressed inwards. This can be done by engaging a tool between the bridge element 13 and the tabs 7. It is however considerably more effective to introduce a screw-driver into the gap between the bridge element and the wall of the cap and parallel with this wall and to press the lower portion of the limb 16 inwards by rotating the screw-driver about its longitudinal axis.
  • the projection 18 disengages from the lower edge of the bridge element 13, the entire spring is automatically pushed away from the casing. This happens as a result of the effect of the spring force of the central web 14 on the one hand and of the effect of the inclined surfaces 21 along which the angled portions 17 slide in the upward direction, on the other. Consequently, the spring moves into the position shown in FIG. 3, and the cap can be easily removed.
  • An electrical housing assembly for a refrigerating machine which is attachable to the casing wall of the refrigerating machine comprising, a plug element attached to said wall, insulatingmeans between said wall and said plug, a cover surrounding said plug, retainer members extending from said casing on opposite sides of said cover, channel shaped guide members extending from said casing on opposite sides of said cover, said guide members extending outwardly a greater distance than said retainer members, said retainer members and said guide members having hooking edges, a U-sh'aped spring straddling said cover, said spring having leg elements with hooks at their extremities and projections spaced from said hooks, said hooks and said projections being engageable with said hooking edges.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Motor Or Generator Frames (AREA)
US00198205A 1970-11-10 1971-11-12 Electric connecting device for an encased refrigerating machine Expired - Lifetime US3790921A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2055184A DE2055184C2 (de) 1970-11-10 1970-11-10 Elektrische Anschlußvorrichtung für eine gekapselte Kältemaschine

Publications (1)

Publication Number Publication Date
US3790921A true US3790921A (en) 1974-02-05

Family

ID=5787654

Family Applications (1)

Application Number Title Priority Date Filing Date
US00198205A Expired - Lifetime US3790921A (en) 1970-11-10 1971-11-12 Electric connecting device for an encased refrigerating machine

Country Status (8)

Country Link
US (1) US3790921A (it)
AU (1) AU3545071A (it)
BR (1) BR7107494D0 (it)
CA (1) CA933270A (it)
DE (1) DE2055184C2 (it)
ES (1) ES396819A1 (it)
FR (1) FR2113704A5 (it)
IT (1) IT940049B (it)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2490591C1 (ru) * 2012-03-16 2013-08-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Московский государственный университет приборостроения и информатики" Устройство для измерения длины линейно протяженных ферромагнитных объектов
WO2023158552A1 (en) * 2022-02-18 2023-08-24 Danfoss A/S Housing arrangement for refrigerant compressor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2869098A (en) * 1955-07-25 1959-01-13 Comar Electric Company Strap type instrument mounting
US3239794A (en) * 1961-11-20 1966-03-08 Danfoss Ved Ing M Clausen Mounting assembly for lead-in unit and receptacle for hermetically enclosed motor compressor
US3491327A (en) * 1967-11-20 1970-01-20 Westland Plastics Inc Safety cover for electrical plug outlets

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2869098A (en) * 1955-07-25 1959-01-13 Comar Electric Company Strap type instrument mounting
US3239794A (en) * 1961-11-20 1966-03-08 Danfoss Ved Ing M Clausen Mounting assembly for lead-in unit and receptacle for hermetically enclosed motor compressor
US3491327A (en) * 1967-11-20 1970-01-20 Westland Plastics Inc Safety cover for electrical plug outlets

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2490591C1 (ru) * 2012-03-16 2013-08-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Московский государственный университет приборостроения и информатики" Устройство для измерения длины линейно протяженных ферромагнитных объектов
WO2023158552A1 (en) * 2022-02-18 2023-08-24 Danfoss A/S Housing arrangement for refrigerant compressor

Also Published As

Publication number Publication date
DE2055184C2 (de) 1978-06-29
ES396819A1 (es) 1974-06-16
BR7107494D0 (pt) 1973-05-24
DE2055184A1 (it) 1972-04-27
AU3545071A (en) 1973-05-17
FR2113704A5 (it) 1972-06-23
CA933270A (en) 1973-09-04
IT940049B (it) 1973-02-10

Similar Documents

Publication Publication Date Title
KR0132582B1 (ko) 브러시 지지 장치
US5320542A (en) Safety cover for sockets
US4324503A (en) Two-piece anchorage device
US2457023A (en) Encasing assembly
EP0220807A2 (en) Retaining device for mounting electrical units
US6302361B1 (en) Switch mounting bracket
US3617611A (en) Grounding connection for outlet box
US3790921A (en) Electric connecting device for an encased refrigerating machine
US4713017A (en) Electrical power receptacle
US2974183A (en) Gasket for electric equipment
US2671887A (en) Continuous electrical outlet
US2708779A (en) Cover clip
US2447676A (en) Electrical receptacle
US2932000A (en) Housing unit and mounting means
US2152468A (en) Lamp holder for refrigerators or the like
US2231976A (en) Electrical receptacle
JPS6343769Y2 (it)
US3159365A (en) Spring fastening
US3093324A (en) Vehicle lamp
US2709723A (en) Encased microphones
US3049371A (en) Spring held and biased latch
US3120574A (en) Screw guard for electrical gutters
JPS5990372A (ja) 電気機器の端子カバ−装置
KR960019864A (ko) 벽 관통 전기 컨넥터 하우징
US2925982A (en) Channel biased ballast holddown